1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
9 JH/01 Avoid costly startup code when not strictly needed. This reduces time
10 for some exim process initialisations. It does mean that the logging
11 of TLS configuration problems is only done for the daemon startup.
13 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
15 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
16 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
19 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
20 DKIM signing is being done. Previously a transport_filter would always
21 disable CHUNKING, falling back to traditional DATA.
23 JH/05 Regard command-line receipients as tainted.
25 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
27 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
28 PAM library frees one of the arguments given to it, despite the
29 documentation. Therefore a plain malloc must be used.
31 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
32 on-stack buffers were used, resulting in a taint trap when DSN information
33 copied from a received message was written into the buffer.
35 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
36 the ordering of its ARC headers. This caused a crash.
38 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
39 a new record was being constructed with information from the peer, a trap
42 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
43 installation would get error messages from DMARC verify, when it hit the
44 nonexistent file indicated by the default. Distros wanting DMARC enabled
45 should both provide the file and set the option.
46 Also enforce no DMARC verification for command-line sourced messages.
48 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
49 could, depending on the platform, hang at the STARTTLS response.
51 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
52 message on a connection. Previously if one message had ARC headers and
53 the following one did not, a crash could result when adding an
54 Authentication-Results: header.
56 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
57 Exim main code and Exim-related utities. The introduction of taint
58 tracking also did many adjustments to string handling. Since then, eximon
59 frequently terminated with an assert failure.
61 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
62 check for 452 responses. This slightly helps the inefficieny of doing
63 a large alias-expansion into a recipient-limited target. The max_rcpt
64 transport option still applies (and at the current default, will override
65 the new feature). The check is done for either cause of synch, and forces
66 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
67 connection. The new facility is not tunable at this time.
69 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
70 library live data was being used, so the results became garbage. Make
71 copies while it is still usable.
73 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
74 on delivery deferred (==) and failed (**) lines (if a delivery was
75 attemtped). Previously it was only on completion (=>) lines.
77 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
78 for the expansion of the server_scram_iter and server_scram_salt options.
80 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
81 are now specifically given a NO_DATA response without hitting the system
82 resolver. The library goes on to do the now-standard TXT lookup.
83 Use of dnsdb lookups is not affected.
85 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
86 only retrieve the errormessage once. Previously two calls to dlerror()
87 were used, and the second one (for mainlog/paniclog) retrieved null
90 JH/20 Taint checking: disallow use of tainted data for
91 - the appendfile transport file and directory options
92 - the pipe transport command
93 - the autoreply transport file, log and once options
94 - file names used by the redirect router (including filter files)
96 Previously this was permitted.
98 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
99 adjusted the size of a major service buffer; this failed because the
100 buffer was in use at the time. Change to a compile-time increase in the
101 buffer size, when this authenticator is compiled into exim.
103 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
104 previous fast-mode was untenable in the face of glibs using mmap to
105 support larger malloc requests.
107 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
108 New values supported, if defined on system where compiled:
109 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
110 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
112 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
113 running a limited number of proceses in parallel, a benefit is gained. The
114 amount varies with the platform hardware and load. The use of the option
115 queue_run_in_order means we cannot do this, as ordering becomes
118 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
119 had introduced a string-copy (for ensuring NUL-termination) which was not
120 appropriate for that case, which can include embedded NUL bytes in the
121 block of data. Investigation showed the copy to actually be needless, the
122 data being length-specified.
124 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
125 done during a receiving connection, and both used TLS, global info was
126 used rather than per-connection info for tracking the state of data
127 queued for transmission. This could result in a connection hang.
129 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
130 Previously, when delivering serveral messages down a single connection
131 only the first would provide a SIZE. This was due to the size information
132 not being properly tracked.
134 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
135 TAI (at 37 seconds currently), pretend to be in UTC for time-related
136 expansion and logging. Previously, spurious values such as a future
137 minute could be seen.
139 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
140 it could crash from a null-deref. This could also affect the
141 ${addresses: } operator and ${readsock } item.
143 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
144 message following a mime one, the variable was not reset.
150 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
151 side, to decode a TLS 1.3 packet capture.
153 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
154 Previously the default library behaviour applied, sending two, each in
157 JH/03 Debug output for ACL now gives the config file name and line number for
160 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
162 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
164 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
165 buffer overrun for (non-chunking) other transports.
167 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
168 TLS1.3, means that a server rejecting a client certificate is not visible
169 to the client until the first read of encrypted data (typically the
170 response to EHLO). Add detection for that case and treat it as a failed
171 TLS connection attempt, so that the normal retry-in-clear can work (if
172 suitably configured).
174 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
175 and/or domain. Found and fixed by Jason Betts.
177 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
178 configuration). If a CNAME target was not a wellformed name pattern, a
181 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
182 the OS reports them interleaved with other addresses.
184 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
185 used both for input and for a verify callout, both encrypted, SMTP
186 responses being sent by the server could be lost. This resulted in
187 dropped connections and sometimes bounces generated by a peer sending
190 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
191 string. Previously it was possible to cause undefined behaviour in a
192 library routine (usually a crash). Found by "zerons".
194 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
197 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
198 API was removed, so update to use the newer ones.
200 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
201 any timeout set, is taking a long time. Previously we would hang on to a
202 rotated logfile "forever" if the input was arriving with long gaps
203 (a previous attempt to fix addressed lack, for a long time, of initial
206 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
207 shared (NFS) environment. The length of the tempfile name is now
208 4 + 16 ("hdr.$message_exim_id") which might break on file
209 systems which restrict the file name length to lower values.
212 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
213 shared (NFS) environment.
215 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
216 did for all versions <4.90). Notably -M, -m, --invert, -I may be
219 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
220 on some platforms for bit 31.
222 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
223 to changes apparently associated with TLS1.3 handling some of the APIs
224 previously used were either nonfunctional or inappropriate. Strings
225 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
226 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
227 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
228 This affects log line X= elements, the $tls_{in,out}_cipher variables,
229 and the use of specific cipher names in the encrypted= ACL condition.
231 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
233 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
234 verification result was not updated unless hosts_require_ocsp applied.
236 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
237 queue_list_requires_admin set to false, non-admin users were denied the
240 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
241 directory-of-certs mode. Previously they were advertised despite the
244 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
245 A single TCP connection by a client will now hold a TLS connection open
246 for multiple message deliveries, by default. Previoud the default was to
249 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
250 default. If built with the facility, DANE will be used. The facility
251 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
253 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
254 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
255 must be defined and you must still, unless you define DISABLE_TLS, manage
256 the the include-dir and library-file requirements that go with that
257 choice. Non-TLS builds are still supported.
259 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
262 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
263 default. If the platform supports and has the facility enabled, it will
264 be requested on all coneections.
266 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
267 controlled by the build-time option SUPPORT_PIPE_CONNECT.
269 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
271 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
272 success-DSN messages. Previously the From: header was always the default
273 one for these; the option was ignored.
275 JH/28 Fix the timeout on smtp response to apply to the whole response.
276 Previously it was reset for every read, so a teergrubing peer sending
277 single bytes within the time limit could extend the connection for a
278 long time. Credit to Qualsys Security Advisory Team for the discovery.
280 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
281 delivery address, which leaked information of the results of local
282 forwarding. Change to the original envelope recipient address, per
285 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
286 requested. Previously not bounce was generated and a log entry of
287 error ignored was made.
289 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
291 JH/32 Introduce a general tainting mechanism for values read from the input
292 channel, and values derived from them. Refuse to expand any tainted
293 values, to catch one form of exploit.
295 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
296 was unused and the unexpanded text used for the test. Found and
297 fixed by Ruben Jenster.
299 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
300 an attempt to use a TLS library read routine dereffed a nul pointer,
303 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
304 them in our smtp response.
306 JH/36 Have the general router option retry_use_local_part default to true when
307 any of the restrictive preconditions are set (to anything). Previously it
308 was only for check_local user. The change removes one item of manual
309 configuration which is required for proper retries when a remote router
310 handles a subset of addresses for a domain.
312 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
313 link count into consideration.
315 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
316 caused the extension of big_buffer, the following lines were ignored.
318 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
319 accordance with RFC 2308. Previously there was no expiry, so a longlived
320 receive process (eg. due to ACL delays) versus a short SOA value could
323 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
325 JH/39 Promote DMARC support to mainline.
327 JH/40 Bug 2452: Add a References: header to DSNs.
329 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
330 parameters. The relevant library call is documented as "Deprecated: This
331 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
332 3.6.0, DH parameters are negotiated following RFC7919."
334 HS/06 Change the default of dnssec_request_domains to "*"
336 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
337 carried on and emitted a BDAT command, even when PIPELINING was not
340 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
341 buffer was used for the filename, resulting in a trap when tainted
342 arguments (eg. $domain) were used.
344 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
345 recommended to avoid a possible server-load attack. The feature can be
346 re-enabled via the openssl_options main cofiguration option.
348 JH/45 local_scan API: documented the current smtp_printf() call. This changed
349 for version 4.90 - adding a "more data" boolean to the arguments.
350 Bumped the ABI version number also, this having been missed previously;
351 release versions 4.90 to 4.92.3 inclusive were effectively broken in
352 respect of usage of smtp_printf() by either local_scan code or libraries
353 accessed via the ${dlfunc } expansion item. Both will need coding
354 adjustment for any calls to smtp_printf() to match the new function
355 signature; a FALSE value for the new argument is always safe.
357 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
358 the file-offset (which the Linux syscall does, and exim expects); this
359 resulted in an indefinite loop.
361 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
362 to do ARC verification. The Authentication-Results: header line added
363 by the configuration then had no ARC item.
369 JH/01 Remove code calling the customisable local_scan function, unless a new
370 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
372 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
373 non-signal-safe functions being used.
375 JH/03 Bug 2269: When presented with a received message having a stupidly large
376 number of DKIM-Signature headers, disable DKIM verification to avoid
377 a resource-consumption attack. The limit is set at twenty.
379 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
380 report of oldest_pass in ${authres } in consequence, and separate out
381 some descriptions of reasons for verification fail.
383 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
384 files in the spool were present and unlocked. A queue-runner could spot
385 them, resulting in a duplicate delivery. Fix that by doing the unlock
386 after the unlink. Investigation by Tim Stewart. Take the opportunity to
387 add more error-checking on spoolfile handling while that code is being
390 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
391 No known attacks, no CVE, this is defensive hardening.
393 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
394 a queue-runner could start a delivery while other operations were ongoing.
395 Cutthrough delivery was a common victim, resulting in duplicate delivery.
396 Found and investigated by Tim Stewart. Fix by using the open message data
397 file handle rather than opening another, and not locally closing it (which
398 releases a lock) for that case, while creating the temporary .eml format
399 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
401 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
402 $sender_verify_failure/$recipient_verify_failure to "random".
404 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
407 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
408 Previously this would segfault.
410 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
413 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
414 like zero, since the resolver should be doing this for us, But we need one
415 as a CNAME but no MX presence gets the CNAME returned; we need to check
416 that doesn't point to an MX to declare it "no MX returned" rather than
417 "error, loop". A new main option is added so the older capability of
418 following some limited number of chain links is maintained.
420 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
422 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
423 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
424 now-deprecated earlier definitions used only specified the range up to TLS
425 1.2 (in the older-version library docs).
427 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
429 JH/15 Rework TLS client-side context management. Stop using a global, and
430 explicitly pass a context around. This enables future use of TLS for
431 connections to service-daemons (eg. malware scanning) while a client smtp
432 connection is using TLS; with cutthrough connections this is quite likely.
434 JH/16 Fix ARC verification to do AS checks in reverse order.
436 JH/17 Support a "tls" option on the ${readsocket } expansion item.
438 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
439 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
440 Previously the "utf8" would be re-prepended for every additional message.
442 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
443 Previously thery were accepted, resulting in issues when attempting to
444 forward messages to a non-supporting MTA.
446 PP/02 Let -n work with printing macros too, not just options.
448 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
449 one parent address was copied, and bogus data was used at delivery-logging
450 time. Either a crash (after delivery) or bogus log data could result.
451 Discovery and analysis by Tim Stewart.
453 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
454 Previously if the string ended mid-character, we did not insert the
455 promised '?' replacement.
457 PP/04 Documentation: current string operators work on bytes, not codepoints.
459 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
460 should pack well giving a smaller memory footprint so better caching and
461 therefore performance. Group the declarations where this can't be done so
462 that the byte-sized flag variables are not interspersed among pointer
463 variables, giving a better chance of good packing by the compiler.
465 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
466 non-null, to avoid issues with sites running BATV. Previously reports were
467 sent with an empty envelope sender so looked like bounces.
469 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
470 The ignore_error flag wasn't being returned from the filter subprocess so
471 was not set for later routers. Investigation and fix by Matthias Kurz.
473 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
474 and a msg:complete for the whole, when a message is manually removed using
475 -Mrm. Developement by Matthias Kurz, hacked on by JH.
477 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
478 a "Gnu special" function, asprintf() in the DB utility binary builds; I
479 hope that is portable enough.
481 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
482 requiring a known-CA anchor certificate; make it now rely entirely on the
483 TLSA as an anchor. Checking the name on the leaf cert against the name
484 on the A-record for the host is still done for TA (but not for EE mode).
486 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
487 included in delivery lines for non-proxied connections, when compiled with
488 SUPPORT_SOCKS and running with proxy logging enabled.
490 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
491 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
492 move the existing event to fire before the normal logging of message
493 failure so that custom logging is bracketed by normal logging.
495 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
496 msg:fail:internal event. Developement by Matthias Kurz.
498 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
499 far too small for todays use of crypto signatures stored there. Go all
500 the way to the max DNS message size of 64kB, even though this might be
501 overmuch for IOT constrained device use.
503 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
504 copy a string over itself. The library routine is documented as not
505 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
507 JH/32 For main options check_spool_space and check_inode_space, where the
508 platform supports 64b integers, support more than the previous 2^31 kB
509 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
510 the previous G, M, k.
512 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
513 $authenticated_fail_id variable on authentication failure. Previously
516 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
517 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
518 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
519 GNUTLS_SEC_PARAM_MEDIUM.
521 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
522 side. Previously we would continue as if no SNI had been received.
524 JH/36 Harden the handling of string-lists. When a list consisted of a sole
525 "<" character, which should be a list-separator specification, we walked
526 off past the nul-terimation.
528 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
529 causes) even when the retry time is not yet met. Previously they were
530 not, meaning that when (say) an account was over-quota and temp-rejecting,
531 and multiple senders' messages were queued, only one sender would get
532 notified on each configured delay_warning cycle.
534 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
536 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
537 cipher-suites, an error can be left on the stack even for a succeeding
538 accept; this results in impossible error messages when a later operation
541 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
542 return error codes indicating retry. Under TLS1.3 this becomes required.
544 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
545 it only wrote the new authenticators, resulting in a lack of tracking of
546 peer changes of ESMTP extensions until the next cache flush.
548 JH/41 Fix the loop reading a message header line to check for integer overflow,
549 and more-often against header_maxsize. Previously a crafted message could
550 induce a crash of the recive process; now the message is cleanly rejected.
552 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
553 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
559 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
560 When redis_servers is set to a list of > 1 element, and the Redis servers
561 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
562 case of MOVED into a DEFER case instead, thus moving the query onto the
563 next server in the list. For a cluster of N elements, all N servers must
564 be defined in redis_servers.
566 GF/02 Catch and remove uninitialized value warning in exiqsumm
567 Check for existence of @ARGV before looking at $ARGV[0]
569 JH/01 Replace the store_release() internal interface with store_newblock(),
570 which internalises the check required to safely use the old one, plus
571 the allocate and data copy operations duplicated in both (!) of the
572 extant use locations.
574 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
575 modifier. This matches the restriction on the commandline.
577 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
578 Previously only the last row was returned.
580 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
581 we assumed that tags in the header were well-formed, and parsed the
582 element content after inspecting only the first char of the tag.
583 Assumptions at that stage could crash the receive process on malformed
586 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
587 While running the DKIM ACL we operate on the Permanent memory pool so that
588 variables created with "set" persist to the DATA ACL. Also (at any time)
589 DNS lookups that fail create cache records using the Permanent pool. But
590 expansions release any allocations made on the current pool - so a dnsdb
591 lookup expansion done in the DKIM ACL releases the memory used for the
592 DNS negative-cache, and bad things result. Solution is to switch to the
593 Main pool for expansions.
594 While we're in that code, add checks on the DNS cache during store_reset,
595 active in the testsuite.
596 Problem spotted, and debugging aided, by Wolfgang Breyha.
598 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
599 When none of the hosts presented to a transport match an already-open
600 connection, close it and proceed with the list. Previously we would
601 queue the message. Spotted by Lena with Yahoo, probably involving
604 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
605 Previously a spurious "250 OK id=" response was appended to the proper
608 JH/08 The "support for" informational output now, which built with Content
609 Scanning support, has a line for the malware scanner interfaces compiled
610 in. Interface can be individually included or not at build time.
612 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
613 by the template makefile "src/EDITME". The "STREAM" support for an older
614 ClamAV interface method is removed.
616 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
617 rows affected is given instead).
619 JH/11 The runtime Berkeley DB library version is now additionally output by
620 "exim -d -bV". Previously only the compile-time version was shown.
622 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
623 SMTP connection. Previously, when one had more receipients than the
624 first, an abortive onward connection was made. Move to full support for
625 multiple onward connections in sequence, handling cutthrough connection
626 for all multi-message initiating connections.
628 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
629 routers. Previously, a multi-recipient message would fail to match the
630 onward-connection opened for the first recipient, and cause its closure.
632 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
633 a timeout on read on a GnuTLS initiating connection, resulting in the
634 initiating connection being dropped. This mattered most when the callout
635 was marked defer_ok. Fix to keep the two timeout-detection methods
638 JH/15 Relax results from ACL control request to enable cutthrough, in
639 unsupported situations, from error to silently (except under debug)
640 ignoring. This covers use with PRDR, frozen messages, queue-only and
643 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
645 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
646 metadata, resulting in a crash in free().
648 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
649 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
650 Broken also in d185889f4, with init system revamp.
652 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
653 Previously we abruptly closed the connection after reading a malware-
654 found indication; now we go on to read the "scan ok" response line,
657 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
658 ACL. Previously, a crash would result.
660 JH/19 Speed up macro lookups during configuration file read, by skipping non-
661 macro text after a replacement (previously it was only once per line) and
662 by skipping builtin macros when searching for an uppercase lead character.
664 JH/20 DANE support moved from Experimental to mainline. The Makefile control
665 for the build is renamed.
667 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
668 was allocated for every new TLS startup, meaning one per message. Fix
669 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
671 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
672 reported the original. Fix to report (as far as possible) the ACL
673 result replacing the original.
675 JH/23 Fix memory leak during multi-message connections using STARTTLS under
676 OpenSSL. Certificate information is loaded for every new TLS startup,
677 and the resources needed to be freed.
679 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
681 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
684 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
685 DATA response info to the (existing) per-recipient response info for
686 the "C=" log element. It can have useful tracking info from the
687 destination system. Patch from Simon Arlott.
689 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
690 length value. Previously this would segfault.
692 HS/02 Support Avast multiline protoocol, this allows passing flags to
693 newer versions of the scanner.
695 JH/28 Ensure that variables possibly set during message acceptance are marked
696 dead before release of memory in the daemon loop. This stops complaints
697 about them when the debug_store option is enabled. Discovered specifically
698 for sender_rate_period, but applies to a whole set of variables.
699 Do the same for the queue-runner and queue-list loops, for variables set
700 from spool message files. Do the same for the SMTP per-message loop, for
701 certain variables indirectly set in ACL operations.
703 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
704 as a multi-recipient message from a mailinglist manager). The coding had
705 an arbitrary cutoff number of characters while checking for more input;
706 enforced by writing a NUL into the buffer. This corrupted long / fast
707 input. The problem was exposed more widely when more pipelineing of SMTP
708 responses was introduced, and one Exim system was feeding another.
709 The symptom is log complaints of SMTP syntax error (NUL chars) on the
710 receiving system, and refused recipients seen by the sending system
711 (propating to people being dropped from mailing lists).
712 Discovered and pinpointed by David Carter.
714 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
715 replaced by the ${authresults } expansion.
717 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
719 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
720 allows proper process termination in container environments.
722 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
723 Previously the "final dot" had a newline after it; ensure it is CR,LF.
725 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
726 and "err_perm", deprecated since 4.83 when the RFC-defined words
727 "temperror" and "permerror" were introduced.
729 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
730 transport-filters or DKIM-signing. The restriction was lost in the
731 consolidation of verify-callout and delivery SMTP handling.
732 Extend the restriction to also cover ARC-signing.
734 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
735 in defer=pass mode supply a 450 to the initiator. Previously the message
738 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
739 tls_require_ciphers is used as before.
741 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
742 "pass_unscanned". Only tmpfails from the scanner are written to
743 the paniclog, as they may require admin intervention (permission
744 denied, license issues). Other scanner errors (like decompression
745 bombs) do not cause a paniclog entry.
747 JH/36 Fix reinitialisation of DKIM logging variable between messages.
748 Previously it was possible to log spurious information in receive log
751 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
752 triggered odd behaviour from Outlook Express clients.
754 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
757 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
758 since the IETF WG has not yet settled on that versus the original
759 "bare" representation.
761 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
762 Previously the millisecond value corrupted the output.
763 Fix also for syslog_pid=no and log_selector +pid, for which the pid
764 corrupted the output.
770 JH/01 Rework error string handling in TLS interface so that the caller in
771 more cases is responsible for logging. This permits library-sourced
772 string to be attached to addresses during delivery, and collapses
773 pairs of long lines into single ones.
775 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
776 during configuration. Wildcards are allowed and expanded.
778 JH/02 Rework error string handling in DKIM to pass more info back to callers.
779 This permits better logging.
781 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
782 do not close it down and have the child transport start it up again on
783 the passed-on TCP connection. Instead, proxy the child (and any
784 subsequent ones) for TLS via a unix-domain socket channel. Logging is
785 affected: the continued delivery log lines do not have any DNSSEC, TLS
786 Certificate or OCSP information. TLS cipher information is still logged.
788 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
789 identical IP addresses on different listening ports. Will also affect
792 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
793 add noisy ifdef guards to special-case this sillyness.
794 Patch from Bernd Kuhls.
796 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
797 than 255 are no longer allowed.
799 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
800 Disable the session-cache too, which might reduce our load. Since we
801 currrectly use a new context for every connection, both as server and
802 client, there is no benefit for these.
803 GnuTLS appears to not support tickets server-side by default (we don't
804 call gnutls_session_ticket_enable_server()) but client side is enabled
805 by default on recent versions (3.1.3 +) unless the PFS priority string
808 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
809 <https://reproducible-builds.org/specs/source-date-epoch/>.
811 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
812 the check for any unsuccessful recipients did not notice the limit, and
813 erroneously found still-pending ones.
815 JH/08 Pipeline CHUNKING command and data together, on kernels that support
816 MSG_MORE. Only in-clear (not on TLS connections).
818 JH/09 Avoid using a temporary file during transport using dkim. Unless a
819 transport-filter is involved we can buffer the headers in memory for
820 creating the signature, and read the spool data file once for the
821 signature and again for transmission.
823 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
824 4.77 as the kernel support then wasn't solid, having issues in 64bit
825 mode. Now, it's been long enough. Add support for FreeBSD also.
827 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
828 case where the routing stage had gathered several addresses to send to
829 a host before calling the transport for the first, we previously failed
830 to close down TLS in the old transport process before passing the TCP
831 connection to the new process. The new one sent a STARTTLS command
832 which naturally failed, giving a failed delivery and bloating the retry
833 database. Investigation and fix prototype from Wolfgang Breyha.
835 JH/12 Fix check on SMTP command input synchronisation. Previously there were
836 false-negatives in the check that the sender had not preempted a response
837 or prompt from Exim (running as a server), due to that code's lack of
838 awareness of the SMTP input buffering.
840 PP/04 Add commandline_checks_require_admin option.
841 Exim drops privileges sanely, various checks such as -be aren't a
842 security problem, as long as you trust local users with access to their
843 own account. When invoked by services which pass untrusted data to
844 Exim, this might be an issue. Set this option in main configuration
845 AND make fixes to the calling application, such as using `--` to stop
848 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
849 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
850 responses to those, into a single TLS record each way (this usually means
851 a single packet). As a side issue, smtp_enforce_sync now works on TLS
854 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
855 affects you only if you're dancing at the edge of the param size limits.
856 If you are, and this message makes sense to you, then: raise the
857 configured limit or use OpenSSL 1.1. Nothing we can do for older
860 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
861 cmdline element to get the documented default one. Previously it was
864 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
865 are unsuable for non-message-specific reasons - eg. connection timeout,
866 banner-time rejection.
868 JH/16 Fix logging of delivery remote port, when specified by router, under
871 PP/06 Repair manualroute's ability to take options in any order, even if one
872 is the name of a transport.
875 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
877 JH/17 Change the list-building routines interface to use the expanding-string
878 triplet model, for better allocation and copying behaviour.
880 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
881 Previously it was constructed the first time a possibly-matching string
882 was met in the configuration file input during startup; now it is done
885 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
886 compatible one, to avoid the (poorly documented) possibility of a config
887 file in the working directory redirecting the DB files, possibly correpting
888 some existing file. CVE-2017-10140 assigned for BDB.
890 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
891 cache-hot. Previously, although the result was properly cached, the
892 initial verify call returned a defer.
894 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
895 the main verify for receipient in uncached-mode.
897 JH/22 Retire historical build files to an "unsupported" subdir. These are
898 defined as "ones for which we have no current evidence of testing".
900 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
901 if present. Previously it was ignored.
903 JH/24 Start using specified-initialisers in C structure init coding. This is
904 a C99 feature (it's 2017, so now considered safe).
906 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
907 if was a fixed-sized field and bitmask ops via macros; it is now more
910 PP/07 GitHub PR 56: Apply MariaDB build fix.
911 Patch provided by Jaroslav Škarvada.
913 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
914 during Coverity cleanups [4.87 JH/47]
915 Diagnosis and fix provided by Michael Fischer v. Mollard.
917 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
918 the right size to place the terminating semicolon on its own folded
919 line, the header hash was calculated to an incorrect value thanks to
920 the (relaxed) space the fold became.
922 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
923 and confused the parent.
925 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
926 which could crash as a result. This could lead to undeliverable messages.
928 JH/28 Logging: "next input sent too soon" now shows where input was truncated
931 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
932 matters on fast-turnover and PID-randomising systems, which were getting
933 out-of-order delivery.
935 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
936 a possibly-overlapping copy. The symptom was that "Remote host closed
937 connection in response to HELO" was logged instead of the actual 4xx
940 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
941 Previously only that bufferd was discarded, resulting in SYMTP command
944 JH/32 DKIM: when a message has multiple signatures matching an identity given
945 in dkim_verify_signers, run the dkim acl once for each. Previously only
946 one run was done. Bug 2189.
948 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
949 "panic the current process" to "deliberately defer". The panic log is
950 still written with the problem list name; the mail and reject logs now
951 get a temp-reject line for the message that was being handled, saying
952 something like "domains check lookup or other defer". The SMTP 451
953 message is still "Temporary local problem".
955 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
956 A crafted sequence of BDAT commands could result in in-use memory beeing
957 freed. CVE-2017-16943.
959 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
960 from SMTP input. Previously it was always done; now only done for DATA
961 and not BDAT commands. CVE-2017-16944.
963 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
964 to the message (such as an overlong header line). Previously this was
965 not done and we did not exit BDAT mode. Followon from the previous item
966 though a different problem.
972 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
973 than -2003 did; needs libidn2 in addition to libidn.
975 JH/02 The path option on a pipe transport is now expanded before use.
977 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
978 Patch provided by "Björn", documentation fix added too.
980 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
981 missing a wire-to-host endian conversion.
983 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
984 close after a BDAT command line could be taken as a following command,
985 giving a synch failure. Fix by only checking for synch immediately
986 before acknowledging the chunk.
988 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
989 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
990 macro. Patches provided by Josh Soref.
992 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
993 Previously we did not; the RFC seems ambiguous and VRFY is not listed
994 by IANA as a service extension. However, John Klensin suggests that we
997 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
998 the dkim code may be unix-mode line endings rather than smtp wire-format
999 CRLF, so prepend a CR to any bare LF.
1001 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1002 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1004 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1005 the first were themselves being wrongly included in the feed into dkim
1006 processing; with most chunk sizes in use this resulted in an incorrect
1007 body hash calculated value.
1009 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1010 DKIM signature block, for verification. Although advised against by
1011 standards it is specifically not ruled illegal.
1013 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1015 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1016 missing a body hash (the bh= tag).
1018 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1019 It seems that HAProxy sends the Proxy Protocol information in clear and
1020 only then does a TLS startup, so do the same.
1022 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1023 TCP connections (such as for Spamd) unless the daemon successfully set
1024 Fast Open mode on its listening sockets. This fixes breakage seen on
1025 too-old kernels or those not configured for Fast Open, at the cost of
1026 requiring both directions being enabled for TFO, and TFO never being used
1027 by non-daemon-related Exim processes.
1029 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1030 endings, at least on the first header line. Try to canonify any that get
1031 past that check, despite the cost.
1033 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1034 now limited to an arbitrary five deep, while parsing addresses with the
1035 strip_excess_angle_brackets option enabled.
1037 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1038 instead leave the unprompted TLS handshake in socket buffer for the
1039 TLS library to consume.
1041 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1043 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1045 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1046 region in one operation, for speed, and this leaves assigned pointers
1047 dangling. Add checks run only under the testsuite which checks all
1048 variables at a store-reset and panics on a dangling pointer; add code
1049 explicitly nulling out all the variables discovered. Fixes one known
1050 bug: a transport crash, where a dangling pointer for $sending_ip_address
1051 originally assigned in a verify callout, is re-used.
1053 PP/06 Drop '.' from @INC in various Perl scripts.
1055 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1057 PP/08 Reduce a number of compilation warnings under clang; building with
1058 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1059 should be warning-free.
1061 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1063 HS/01 Fix portability problems introduced by PP/08 for platforms where
1064 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1066 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1067 chunk. This allows us to accept broken chunked messages. We need a more
1068 general solution here.
1070 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1071 already-broken messages in the queue.
1073 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1075 JH/19 Fix reference counting bug in routing-generated-address tracking.
1081 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1082 supports it and a size is available (ie. the sending peer gave us one).
1084 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1085 years of being deprecated). The replacements are the ACLs
1086 acl_smtp_mime and acl_not_smtp_mime.
1088 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1089 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1090 or even an in-clear connection were permitted. Now, if the host lookup
1091 was dnssec and dane was requested then the host is only used if the
1092 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1093 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1094 if one fails this test.
1095 This means that a poorly-configured remote DNS will make it incommunicado;
1096 but it protects against a DNS-interception attack on it.
1098 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1099 non-noisy when a race steals the message being considered.
1101 JH/05 If main configuration option tls_certificate is unset, generate a
1102 self-signed certificate for inbound TLS connections.
1104 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1105 in rewrites and routers.
1107 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1108 and logged a warning sing 4.83; now they are a configuration file error.
1110 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1111 (lacking @domain). Apply the same qualification processing as RCPT.
1113 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1115 JH/10 Support ${sha256:} applied to a string (as well as the previous
1118 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1119 a cutthrough deliver is pending, as we always want to make a connection.
1120 This also avoids re-routing the message when later placing the cutthrough
1121 connection after a verify cache hit.
1122 Do not update it with the verify result either.
1124 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1125 when routing results in more than one destination address.
1127 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1128 signing (which inhibits the cutthrough capability). Previously only
1129 the presence of an option was tested; now an expansion evaluating as
1130 empty is permissible (obviously it should depend only on data available
1131 when the cutthrough connection is made).
1133 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1134 the relevant preceding SMTP command did not note the pipelining mode.
1136 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1137 Previously they were not counted.
1139 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1140 as one having no matching records. Previously we deferred the message
1141 that needed the lookup.
1143 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1144 distinguished as "(=".
1146 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1147 for missing MX records. Previously it only worked for missing A records.
1149 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1151 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1152 after the data-go-ahead and data-ack. Patch from Jason Betts.
1154 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1155 even for a "none" policy. Patch from Tony Meyer.
1157 JH/22 Fix continued use of a connection for further deliveries. If a port was
1158 specified by a router, it must also match for the delivery to be
1161 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1162 When one of the recipients of a message was unsuitable for the connection
1163 (has no matching addresses), we lost track of needing to mark it
1164 deferred. As a result mail would be lost.
1166 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1168 JH/25 Decoding ACL controls is now done using a binary search; the source code
1169 takes up less space and should be simpler to maintain. Merge the ACL
1170 condition decode tables also, with similar effect.
1172 JH/26 Fix problem with one_time used on a redirect router which returned the
1173 parent address unchanged. A retry would see the parent address marked as
1174 delivered, so not attempt the (identical) child. As a result mail would
1177 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1178 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1179 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1182 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1183 Main config options check_{log,spool}_{inodes,space} are now
1184 100 inodes, 10MB unless set otherwise in the configuration.
1186 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1187 Previously it only applied to the main-section connection policy
1190 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1192 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1193 by me. Added RFC7919 DH primes as an alternative.
1195 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1196 are not in the system include path.
1198 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1199 GnuTLS, when a session startup failed (eg because the client disconnected)
1200 Exim did stdio operations after fclose. This was exposed by a recent
1201 change which nulled out the file handle after the fclose.
1203 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1204 signed directly by the cert-signing cert, rather than an intermediate
1205 OCSP-signing cert. This is the model used by LetsEncrypt.
1207 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1209 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1210 an incoming connection.
1212 HS/02 Bug 1802: Do not half-close the connection after sending a request
1215 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1216 fallback to "prime256v1".
1218 JH/34 SECURITY: Use proper copy of DATA command in error message.
1219 Could leak key material. Remotely exploitable. CVE-2016-9963.
1225 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1226 and 3.4.4 - once the server is enabled to respond to an OCSP request
1227 it does even when not requested, resulting in a stapling non-aware
1228 client dropping the TLS connection.
1230 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1231 support variable-length bit vectors. No functional change.
1233 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1234 The I= interface field on outgoing lines is now after the H= remote
1235 host field, same as incoming lines. There is a separate
1236 outgoing_interface log selector which allows you to disable the
1239 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1240 If not running log_selector +smtp_connection the mainlog would be held
1241 open indefinitely after a "too many connections" event, including to a
1242 deleted file after a log rotate. Leave the per net connection logging
1243 leaving it open for efficiency as that will be quickly detected by the
1244 check on the next write.
1246 HS/01 Bug 1671: Fix post transport crash.
1247 Processing the wait-<transport> messages could crash the delivery
1248 process if the message IDs didn't exist for some reason. When
1249 using 'split_spool_directory=yes' the construction of the spool
1250 file name failed already, exposing the same netto behaviour.
1252 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1253 mime_regex ACL conditions.
1255 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1256 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1257 to HELO, local diagnostic string.
1259 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1260 log line to debug. Even when configured with a tls authenticator many
1261 client connections are expected to not authenticate in this way, so
1262 an authenticate fail is not an error.
1264 HS/02 Add the Exim version string to the process info. This way exiwhat
1265 gives some more detail about the running daemon.
1267 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1268 matter for fast-change records such as DNSBLs.
1270 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1271 retry record, even if constant. There may be multiple transports with
1272 different interface settings and the retry behaviour needs to be kept
1275 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1277 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1279 JH/10 Bug 840: fix log_defer_output option of pipe transport
1281 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1282 hosts_randomize. This matters a lot when combined with mua_wrapper.
1284 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1285 ${quote_pgsql:<string>} operator.
1287 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1289 JH/14 Change header file name for freeradius-client. Relevant if compiling
1290 with Radius support; from the Gentoo tree and checked under Fedora.
1292 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1294 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1295 option transport_filter, meaning no filtering.
1297 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1299 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1300 defaults to "*" (all hosts). The variable is now available when not built
1301 with TLS, default unset, mainly to enable keeping the testsuite sane.
1302 If a server certificate is not supplied (via tls_certificate) an error is
1303 logged, and clients will find TLS connections fail on startup. Presumably
1304 they will retry in-clear.
1305 Packagers of Exim are strongly encouraged to create a server certificate
1306 at installation time.
1308 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1309 with the $config_file variable.
1311 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1312 in transport context, after the attempt, and per-recipient. The latter type
1313 is per host attempted. The event data is the error message, and the errno
1314 information encodes the lookup type (A vs. MX) used for the (first) host,
1315 and the trailing two digits of the smtp 4xx response.
1317 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1318 to write to mainlog (or rejectlog, paniclog) in the window between file
1319 creation and permissions/ownership being changed. Particularly affects
1320 installations where exicyclog is run as root, rather than exim user;
1321 result is that the running daemon panics and dies.
1323 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1325 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1326 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1327 "pri" and "weight". Note that the previous implicit priority given by the
1328 list order is no longer honoured.
1330 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1331 for DKIM processing.
1333 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1334 by defining SUPPORT_SOCKS.
1336 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1337 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1338 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1339 variables are renamed to proxy_{local,external}_{address,port}.
1341 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1342 for a build by defining SUPPORT_I18N
1344 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1345 of the query string, and make ${quote_redis:} do that quoting.
1347 JH/29 Move Events support from Experimental to mainline, enabled by default
1348 and removable for a build by defining DISABLE_EVENT.
1350 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1352 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1353 cached by the daemon.
1355 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1356 by defining LOOKUP_REDIS. The libhiredis library is required.
1358 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1359 keys are given for lookup.
1361 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1362 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1363 only supported when built with TLS support. The PolarSSL SHA routines
1364 are still used when the TLS library is too old for convenient support.
1366 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1367 openssl_options), for security. OpenSSL forces this from version 1.1.0
1368 server-side so match that on older versions.
1370 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1371 allocation for $value could be released as the expansion processing
1372 concluded, but leaving the global pointer active for it.
1374 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1375 and to use the domains and local_parts ACL conditions.
1377 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1378 incorrectly not doubled on cutthrough transmission, hence seen as a
1379 body-termination at the receiving system - resulting in truncated mails.
1380 Commonly the sender saw a TCP-level error, and retransmitted the message
1381 via the normal store-and-forward channel. This could result in duplicates
1382 received - but deduplicating mailstores were liable to retain only the
1383 initial truncated version.
1385 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1387 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1389 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1390 we're in there, support oversigning also; bug 1309.
1392 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1394 HS/04 Add support for keep_environment and add_environment options.
1396 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1397 either intentional arithmetic overflow during PRNG, or testing config-
1400 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1401 delivery resulted in actual delivery. Cancel cutthrough before DATA
1404 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1405 rejects a recipient: pass the reject to the originator.
1407 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1408 Many were false-positives and ignorable, but it's worth fixing the
1411 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1412 for the new environment-manipulation done at startup. Move the routines
1413 from being local to tls.c to being global via the os.c file.
1415 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1416 an extract embedded as result-arg for a map, the first arg for extract
1417 is unavailable so we cannot tell if this is a numbered or keyed
1418 extraction. Accept either.
1424 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1427 JH/02 The smtp transport option "multi_domain" is now expanded.
1429 JH/03 The smtp transport now requests PRDR by default, if the server offers
1432 JH/04 Certificate name checking on server certificates, when exim is a client,
1433 is now done by default. The transport option tls_verify_cert_hostnames
1434 can be used to disable this per-host. The build option
1435 EXPERIMENTAL_CERTNAMES is withdrawn.
1437 JH/05 The value of the tls_verify_certificates smtp transport and main options
1438 default to the word "system" to access the system default CA bundle.
1439 For GnuTLS, only version 3.0.20 or later.
1441 JH/06 Verification of the server certificate for a TLS connection is now tried
1442 (but not required) by default. The verification status is now logged by
1443 default, for both outbound TLS and client-certificate supplying inbound
1446 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1449 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1450 Status Notification (bounce) messages are now MIME format per RFC 3464.
1451 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1452 under the control of the dsn_advertise_hosts option, and routers may
1453 have a dsn_lasthop option.
1455 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1456 default, modifiable by a malware= option. The list separator for
1457 the options can now be changed in the usual way. Bug 68.
1459 JH/10 The smtp_receive_timeout main option is now expanded before use.
1461 JH/11 The incoming_interface log option now also enables logging of the
1462 local interface on delivery outgoing connections.
1464 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1465 if the interface and destination host and port all match.
1467 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1470 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1471 Patch from Andrew Lewis.
1473 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1474 now supports optional time-restrictions, weighting, and priority
1475 modifiers per server. Patch originally by <rommer@active.by>.
1477 JH/16 The spamd_address main option now supports a mixed list of local
1478 and remote servers. Remote servers can be IPv6 addresses, and
1479 specify a port-range.
1481 JH/17 Bug 68: The spamd_address main option now supports an optional
1482 timeout value per server.
1484 JH/18 Bug 1581: Router and transport options headers_add/remove can
1485 now have the list separator specified.
1487 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1490 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1493 JH/21 Support for the A6 type of dns record is withdrawn.
1495 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1496 rather than the verbs used.
1498 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1499 from 255 to 1024 chars.
1501 JH/24 Verification callouts now attempt to use TLS by default.
1503 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1504 are generic router options now. The defaults didn't change.
1506 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1507 Original patch from Alexander Shikoff, worked over by JH.
1509 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1510 files if ZCAT_COMMAND is not executable.
1512 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1514 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1516 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1517 Normally benign, it bites when the pair was led to by a CNAME;
1518 modern usage is to not canonicalize the domain to a CNAME target
1519 (and we were inconsistent anyway for A-only vs AAAA+A).
1521 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1523 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1524 when evaluating $sender_host_dnssec.
1526 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1527 $sender_helo_dnssec variable.
1529 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1531 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1533 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1535 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1536 documented as working, but never had. Support all but $spam_report.
1538 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1539 added for tls authenticator.
1541 HS/03 Add perl_taintmode main config option
1547 TL/01 When running the test suite, the README says that variables such as
1548 no_msglog_check are global and can be placed anywhere in a specific
1549 test's script, however it was observed that placement needed to be near
1550 the beginning for it to behave that way. Changed the runtest perl
1551 script to read through the entire script once to detect and set these
1552 variables, reset to the beginning of the script, and then run through
1553 the script parsing/test process like normal.
1555 TL/02 The BSD's have an arc4random API. One of the functions to induce
1556 adding randomness was arc4random_stir(), but it has been removed in
1557 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1558 function when detected.
1560 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1561 cause callback expansion.
1563 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1564 syntax errors in an expansion can be treated as a string instead of
1565 logging or causing an error, due to the internal use of bool_lax
1566 instead of bool when processing it.
1568 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1569 server certificates when making smtp deliveries.
1571 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1573 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1575 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1577 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1578 Merged patch from Sebastian Wiedenroth.
1580 JH/05 Fix results-pipe from transport process. Several recipients, combined
1581 with certificate use, exposed issues where response data items split
1582 over buffer boundaries were not parsed properly. This eventually
1583 resulted in duplicates being sent. This issue only became common enough
1584 to notice due to the introduction of connection certificate information,
1585 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1587 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1588 size buffer was used, resulting in syntax errors when an expansion
1591 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1592 version 3.3.6 or later.
1594 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1595 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1596 both become "event_action", the variables become $event_name, $event_data
1597 and $event_defer_errno. There is a new variable $verify_mode, usable in
1598 routers, transports and related events. The tls:cert event is now also
1599 raised for inbound connections, if the main configuration event_action
1602 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1603 early OCSP support, but no stapling (appears to be less than 1.0.0).
1605 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1606 server certificate names available under the smtp transport option
1607 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1610 JH/10 Time-related extraction expansions from certificates now use the main
1611 option "timezone" setting for output formatting, and are consistent
1612 between OpenSSL and GnuTLS compilations. Bug 1541.
1614 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1615 encoded parameter in the incoming message. Bug 1558.
1617 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1618 include certificate info, eximon was claiming there were spoolfile
1621 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1623 JH/14 Log delivery-related information more consistently, using the sequence
1624 "H=<name> [<ip>]" wherever possible.
1626 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1627 are problematic for Debian distribution, omit them from the release
1630 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1632 JH/16 Fix string representation of time values on 64bit time_t architectures.
1635 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1636 output list separator was used.
1641 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1642 checkers that were complaining about end of non-void function with no
1645 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1646 This was a regression introduced in 4.83 by another bugfix.
1648 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1650 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1651 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1657 TF/01 Correctly close the server side of TLS when forking for delivery.
1659 When a message was received over SMTP with TLS, Exim failed to clear up
1660 the incoming connection properly after forking off the child process to
1661 deliver the message. In some situations the subsequent outgoing
1662 delivery connection happened to have the same fd number as the incoming
1663 connection previously had. Exim would try to use TLS and fail, logging
1664 a "Bad file descriptor" error.
1666 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1667 utilities have not been installed.
1669 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1670 temporary space as the ACL may create new global variables.
1672 TL/01 LDAP support uses per connection or global context settings, depending
1673 upon the detected version of the libraries at build time.
1675 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1676 to extract and use the src ip:port in logging and expansions as if it
1677 were a direct connection from the outside internet. PPv2 support was
1678 updated based on HAProxy spec change in May 2014.
1680 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1682 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1683 Properly escape header and check for NULL return.
1685 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1688 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1690 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1691 characters in header names, implemented as a verify condition.
1692 Contributed by Michael Fischer v. Mollard.
1694 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1695 results permerror and temperror. Previous values are deprecated but
1696 still accepted. In a future release, err_perm and err_temp will be
1697 completely removed, which will be a backward incompatibility if the
1698 ACL tests for either of these two old results. Patch contributed by
1699 user bes-internal on the mailing list.
1701 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1703 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1704 selectors, in both main and reject logs.
1706 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1709 JH/07 Add malware type "sock" for talking to simple daemon.
1711 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1713 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1714 routers/transports under cutthrough routing.
1716 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1717 numbers. Touch up "bool" conditional to keep the same definition.
1719 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1721 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1723 JH/12 Expand items in router/transport headers_add or headers_remove lists
1724 individually rather than the list as a whole. Bug 1452.
1726 Required for reasonable handling of multiple headers_ options when
1727 they may be empty; requires that headers_remove items with embedded
1728 colons must have them doubled (or the list-separator changed).
1730 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1731 view the policy declared in the DMARC record. Currently, $dmarc_status
1732 is a combined value of both the record presence and the result of the
1735 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1737 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1738 dnslookup router and the smtp transport (applying to the forward
1741 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1742 of ldap servers used for a specific lookup. Patch provided by Heiko
1745 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1746 New variable $lookup_dnssec_authenticated for observability.
1748 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1749 Patch submitted by Lars Timman.
1751 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1753 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1754 Requires trusted mode and valid format message id, aborts otherwise.
1755 Patch contributed by Heiko Schlichting.
1757 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1758 certextract with support for various fields. Bug 1358.
1760 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1761 is requested by default, modifiable by smtp transport option
1764 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1765 operate on certificate variables to give certificate fingerprints
1766 Also new ${sha256:cert_variable}.
1768 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1770 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1771 Christian Aistleitner.
1773 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1775 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1776 file. Patch from Wolfgang Breyha.
1778 JH/25 Expand the coverage of the delivery $host and $host_address to
1779 client authenticators run in verify callout. Bug 1476.
1781 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1782 align with daemon_smtp_ports. Bug 72.
1784 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1785 support and error reporting did not work properly.
1787 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1788 and is readable. Patch from Andrew Colin Kissa.
1790 TL/14 Enhance documentation of ${run expansion and how it parses the
1791 commandline after expansion, particularly in the case when an
1792 unquoted variable expansion results in an empty value.
1794 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1796 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1797 by renaming away from it. Addresses GH issue 15, reported by
1800 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1802 TL/15 SECURITY: prevent double expansion in math comparison functions
1803 (can expand unsanitized data). Not remotely exploitable.
1810 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1812 PP/02 Make -n do something, by making it not do something.
1813 When combined with -bP, the name of an option is not output.
1815 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1818 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1819 $sender_host_name and config options to manage this, and basic check
1822 PP/05 DSCP support for outbound connections and control modifier for inbound.
1824 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1825 (Only plugin which currently uses this is kerberos4, which nobody should
1826 be using, but we should make it available and other future plugins might
1827 conceivably use it, even though it would break NAT; stuff *should* be
1828 using channel bindings instead).
1830 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1831 name; added for Sendmail compatibility; requires admin caller.
1832 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1833 just ignore it); requires trusted caller.
1834 Also parse but ignore: -Ac -Am -X<logfile>
1837 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1839 TL/02 Add +smtp_confirmation as a default logging option.
1841 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1842 Patch by Magnus Holmgren from 2007-02-20.
1844 TL/04 Bugzilla 1281 - Spec typo.
1845 Bugzilla 1283 - Spec typo.
1846 Bugzilla 1290 - Spec grammar fixes.
1848 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1850 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1852 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1853 mailing list by by Dmitry Isaikin.
1855 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1857 JH/02 Support "G" suffix to numbers in ${if comparisons.
1859 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1861 NM/01 Bugzilla 1197 - Spec typo
1862 Bugzilla 1196 - Spec examples corrections
1864 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1866 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1867 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1870 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1871 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1873 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1874 "acl {{name}{arg}...}", and optional args on acl condition
1877 JH/05 Permit multiple router/transport headers_add/remove lines.
1879 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1881 JH/07 Avoid using a waiting database for a single-message-only transport.
1882 Performance patch from Paul Fisher. Bugzilla 1262.
1884 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1887 JH/09 Add $headers_added variable, with content from use of ACL modifier
1888 add_header (but not yet added to the message). Bugzilla 199.
1890 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1891 Pulled from Bugzilla 817 by Wolfgang Breyha.
1893 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1895 (nb: this is the same fix as in Exim 4.80.1)
1897 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1900 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1903 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1905 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1906 advertise SMTP AUTH mechanism to us, instead of a generic
1907 protocol violation error. Also, make Exim more robust to bad
1908 data from the Dovecot auth socket.
1910 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1912 When a queue runner is handling a message, Exim first routes the
1913 recipient addresses, during which it prunes them based on the retry
1914 hints database. After that it attempts to deliver the message to
1915 any remaining recipients. It then updates the hints database using
1918 So if a recipient address works intermittently, it can get repeatedly
1919 deferred at routing time. The retry hints record remains fresh so the
1920 address never reaches the final cutoff time.
1922 This is a fairly common occurrence when a user is bumping up against
1923 their storage quota. Exim had some logic in its local delivery code
1924 to deal with this. However it did not apply to per-recipient defers
1925 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1927 This change adds a proper retry rule check during routing so that the
1928 final cutoff time is checked against the message's age. We only do
1929 this check if there is an address retry record and there is not a
1930 domain retry record; this implies that previous attempts to handle
1931 the address had the retry_use_local_parts option turned on. We use
1932 this as an approximation for the destination being like a local
1933 delivery, as in LMTP.
1935 I suspect this new check makes the old local delivery cutoff check
1936 redundant, but I have not verified this so I left the code in place.
1938 TF/02 Correct gecos expansion when From: is a prefix of the username.
1940 Test 0254 submits a message to Exim with the header
1944 When I ran the test suite under the user fanf2, Exim expanded
1945 the header to contain my full name, whereas it should have added
1946 a Resent-Sender: header. It erroneously treats any prefix of the
1947 username as equal to the username.
1949 This change corrects that bug.
1951 GF/01 DCC debug and logging tidyup
1952 Error conditions log to paniclog rather than rejectlog.
1953 Debug lines prefixed by "DCC: " to remove any ambiguity.
1955 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1957 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1958 Bug spotted by Jeremy Harris; was flawed since initial commit.
1959 Would have resulted in OCSP responses post-SNI triggering an Exim
1960 NULL dereference and crash.
1962 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1964 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1965 Bug detection, analysis and fix by Samuel Thibault.
1966 Bugzilla 1331, Debian bug #698092.
1968 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1970 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1971 Server implementation by Todd Lyons, client by JH.
1972 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1973 config variable "prdr_enable" controls whether the server
1974 advertises the facility. If the client requests PRDR a new
1975 acl_data_smtp_prdr ACL is called once for each recipient, after
1976 the body content is received and before the acl_smtp_data ACL.
1977 The client is controlled by both of: a hosts_try_prdr option
1978 on the smtp transport, and the server advertisement.
1979 Default client logging of deliveries and rejections involving
1980 PRDR are flagged with the string "PRDR".
1982 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1983 fclose(). Diagnosis by Todd Lyons.
1985 PP/17 Update configure.default to handle IPv6 localhost better.
1986 Patch by Alain Williams (plus minor tweaks).
1989 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1990 This is now consistent with GnuTLS, and is now documented: the
1991 previous undocumented portable approach to treating the option as
1992 unset was to force an expansion failure. That still works, and
1993 an empty string is now equivalent.
1995 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1996 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1997 not performing validation itself.
1999 PP/20 Added force_command boolean option to pipe transport.
2000 Patch from Nick Koston, of cPanel Inc.
2002 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2005 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2007 PP/21 Fix eximon continuous updating with timestamped log-files.
2008 Broken in a format-string cleanup in 4.80, missed when I repaired the
2009 other false fix of the same issue.
2010 Report and fix from Heiko Schlichting.
2013 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2014 Report from Prashanth Katuri.
2016 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2017 It's SecureTransport, so affects any MacOS clients which use the
2018 system-integrated TLS libraries, including email clients.
2020 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2021 using a MIME ACL for non-SMTP local injection.
2022 Report and assistance in diagnosis by Warren Baker.
2024 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2026 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2028 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2029 last id that failed so it may be referenced in subsequent ACL's.
2031 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2034 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2035 ldap library initialization, allowing self-signed CA's to be
2036 used. Also properly sets require_cert option later in code by
2037 using NULL (global ldap config) instead of ldap handle (per
2038 session). Bug diagnosis and testing by alxgomz.
2040 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2041 the src/util/ subdirectory.
2043 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2044 renamed to Transport Post Delivery Action by Jeremy Harris, as
2047 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2048 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2049 redis_servers = needs to be configured which will be used by the redis
2050 lookup. Patch from Warren Baker, of The Packet Hub.
2052 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2054 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2055 hostname or reverse DNS when processing a host list. Used suggestions
2056 from multiple comments on this bug.
2058 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2060 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2061 Missed a few lines, added it to make the runtest require no keyboard
2064 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2065 contains upper case chars. Make router use caseful_local_part.
2067 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2068 support when GnuTLS has been built with p11-kit.
2074 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2076 This, or similar/improved, will also be change PP/11 of 4.82.
2082 PP/01 Handle short writes when writing local log-files.
2083 In practice, only affects FreeBSD (8 onwards).
2084 Bugzilla 1053, with thanks to Dmitry Isaikin.
2086 NM/01 Bugzilla 949 - Documentation tweak
2088 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2091 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2093 PP/02 Implemented gsasl authenticator.
2095 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2097 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2098 `pkg-config foo` for cflags/libs.
2100 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2101 with rest of GSASL and with heimdal_gssapi.
2103 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2104 `pkg-config foo` for cflags/libs for the TLS implementation.
2106 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2107 properties get this fed in as external SSF. A number of robustness
2108 and debugging improvements to the cyrus_sasl authenticator.
2110 PP/08 cyrus_sasl server now expands the server_realm option.
2112 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2113 Patch by Jeremy Harris.
2115 PP/10 Added dbmjz lookup type.
2117 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2119 PP/12 MAIL args handles TAB as well as SP, for better interop with
2120 non-compliant senders.
2121 Analysis and variant patch by Todd Lyons.
2123 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2124 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2125 Patch from Dirk Mueller <dmueller@suse.com>
2127 PP/13 tls_peerdn now print-escaped for spool files.
2128 Observed some $tls_peerdn in wild which contained \n, which resulted
2129 in spool file corruption.
2131 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2132 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2133 or write after TLS renegotiation, which otherwise led to messages
2136 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2137 as a tracking header (ie: a signed header comes before the signature).
2138 Patch from Wolfgang Breyha.
2140 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2141 comma-sep list; embedded commas doubled.
2143 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2145 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2147 Report and patch from Dmitry Banschikov.
2149 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2150 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2151 failures. We appear to now support TLS1.1+ with Exim.
2153 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2154 lets Exim select keys and certificates based upon TLS SNI from client.
2155 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2156 before an outbound SMTP session. New log_selector, +tls_sni.
2158 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2159 NULL dereference. Report and patch from Alun Jones.
2161 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2162 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2163 Not seeing resolver debug output on NetBSD, but suspect this is a
2164 resolver implementation change.
2166 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2167 Left warnings. Added "eximon gdb" invocation mode.
2169 PP/21 Defaulting "accept_8bitmime" to true, not false.
2171 PP/22 Added -bw for inetd wait mode support.
2173 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2174 locate the relevant includes and libraries. Made this the default.
2176 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2177 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2179 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2180 This may cause build issues on older platforms.
2182 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2183 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2184 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2185 Added SNI support via GnuTLS too.
2186 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2188 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2190 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2191 Applied second patch from Janne, implementing suggestion to default
2192 multiple-strings-in-record handling to match SPF spec.
2194 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2196 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2197 read-only, out of scope).
2198 Patch from Wolfgang Breyha, report from Stuart Northfield.
2200 PP/29 Fix three issues highlighted by clang analyser static analysis.
2201 Only crash-plausible issue would require the Cambridge-specific
2202 iplookup router and a misconfiguration.
2203 Report from Marcin Mirosław.
2205 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2207 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2208 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2209 As part of this, removing so much warning spew let me fix some minor
2210 real issues in debug logging.
2212 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2213 assignment on my part. Fixed.
2215 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2216 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2217 Janne Snabb (who went above and beyond: thank you).
2219 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2220 string otherwise requires a connection and a bunch more work and it's
2221 relatively easy to get wrong. Should also expose TLS library linkage
2224 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2225 64-bit ${eval} (JH/03).
2227 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2228 GNU libc to support some of the 64-bit stuff, should not lead to
2229 conflicts. Defined before os.h is pulled in, so if a given platform
2230 needs to override this, it can.
2232 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2233 protection layer was required, which is not implemented.
2234 Bugzilla 1254, patch from Wolfgang Breyha.
2236 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2237 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2238 tls_dhparam take prime identifiers. Also unbreak combination of
2239 OpenSSL+DH_params+TLSSNI.
2241 PP/39 Disable SSLv2 by default in OpenSSL support.
2247 PP/01 Solaris build fix for Oracle's LDAP libraries.
2248 Bugzilla 1109, patch from Stephen Usher.
2250 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2252 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2255 TF/02 Fix a couple more cases where we did not log the error message
2256 when unlink() failed. See also change 4.74-TF/03.
2258 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2259 lock up or crash if it happened to be inside a call to libc when it
2260 got a SIGUSR1 from exiwhat.
2262 The SIGUSR1 handler appends the current process status to the process
2263 log which is later printed by exiwhat. It used to use the general
2264 purpose logging code to do this, but several functions it calls are
2265 not safe for signals.
2267 The new output code in the SIGUSR1 handler is specific to the process
2268 log, and simple enough that it's easy to inspect for signal safety.
2269 Removing some special cases also simplifies the general logging code.
2270 Removing the spurious timestamps from the process log simplifies
2273 TF/04 Improved ratelimit ACL condition.
2275 The /noupdate option has been deprecated in favour of /readonly which
2276 has clearer semantics. The /leaky, /strict, and /readonly update modes
2277 are mutually exclusive. The update mode is no longer included in the
2278 database key; it just determines when the database is updated. (This
2279 means that when you upgrade Exim will forget old rate measurements.)
2281 Exim now checks that the per_* options are used with an update mode that
2282 makes sense for the current ACL. For example, when Exim is processing a
2283 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2284 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2285 must specify per_mail/readonly. If you omit the update mode it defaults to
2286 /leaky where that makes sense (as before) or /readonly where required.
2288 The /noupdate option is now undocumented but still supported for
2289 backwards compatibility. It is equivalent to /readonly except that in
2290 ACLs where /readonly is required you may specify /leaky/noupdate or
2291 /strict/noupdate which are treated the same as /readonly.
2293 A useful new feature is the /count= option. This is a generalization
2294 of the per_byte option, so that you can measure the throughput of other
2295 aggregate values. For example, the per_byte option is now equivalent
2296 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2298 The per_rcpt option has been generalized using the /count= mechanism
2299 (though it's more complicated than the per_byte equivalence). When it is
2300 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2301 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2302 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2303 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2304 Note that using per_rcpt with a non-readonly update mode in more than
2305 one ACL will cause the recipients to be double-counted. (The per_mail
2306 and per_byte options don't have this problem.)
2308 The handling of very low rates has changed slightly. If the computed rate
2309 is less than the event's count (usually one) then this event is the first
2310 after a long gap. In this case the rate is set to the same as this event's
2311 count, so that the first message of a spam run is counted properly.
2313 The major new feature is a mechanism for counting the rate of unique
2314 events. The new per_addr option counts the number of different
2315 recipients that someone has sent messages to in the last time period. It
2316 behaves like per_rcpt if all the recipient addresses are different, but
2317 duplicate recipient addresses do not increase the measured rate. Like
2318 the /count= option this is a general mechanism, so the per_addr option
2319 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2320 example, measure the rate that a client uses different sender addresses
2321 with the options per_mail/unique=$sender_address. There are further
2322 details in the main documentation.
2324 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2326 TF/06 Removed a few PCRE remnants.
2328 TF/07 Automatically extract Exim's version number from tags in the git
2329 repository when doing development or release builds.
2331 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2332 Bugzilla 879. Patch from Paul Fisher.
2334 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2335 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2338 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2340 PP/05 Variable $av_failed, true if the AV scanner deferred.
2341 Bugzilla 1078. Patch from John Horne.
2343 PP/06 Stop make process more reliably on build failure.
2344 Bugzilla 1087. Patch from Heiko Schlittermann.
2346 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2347 Bugzilla 1089. Patch from Heiko Schlittermann.
2349 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2350 Bugzilla 1131. Patch from Holger Weiß.
2352 PP/09 Handle IPv6 addresses with SPF.
2353 Bugzilla 860. Patch from Wolfgang Breyha.
2355 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2357 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2360 PP/11 match_* no longer expand right-hand-side by default.
2361 New compile-time build option, EXPAND_LISTMATCH_RHS.
2362 New expansion conditions, "inlist", "inlisti".
2364 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2366 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2368 PP/14 fix log_write() format string regression from TF/03.
2369 Bugzilla 1152. Patch from Dmitry Isaikin.
2375 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2377 PP/02 Harmonised TLS library version reporting; only show if debugging.
2378 Layout now matches that introduced for other libraries in 4.74 PP/03.
2380 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2382 PP/04 New "dns_use_edns0" global option.
2384 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2387 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2388 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2390 TK/01 Updated PolarSSL code to 0.14.2.
2391 Bugzilla 1097. Patch from Andreas Metzler.
2393 PP/07 Catch divide-by-zero in ${eval:...}.
2394 Fixes bugzilla 1102.
2396 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2399 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2400 format-string attack -- SECURITY: remote arbitrary code execution.
2402 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2403 time unintentionally subject to list matching rules, letting the header
2404 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2405 arbitrary string expansion). This allowed for information disclosure.
2407 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2408 INT_MIN/-1 -- value coerced to INT_MAX.
2414 NM/01 Workaround for PCRE version dependency in version reporting
2417 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2418 This fixes portability to compilers other than gcc, notably
2419 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2421 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2422 makefiles for portability to HP-UX and POSIX correctness.
2424 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2425 Also via indented variable definition in the Makefile.
2426 (Debugging by Oliver Heesakkers).
2428 PP/02 Restore caching of spamd results with expanded spamd_address.
2429 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2431 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2432 Improves build reliability. Fix from: Frank Elsner
2434 NM/02 Fix wide character breakage in the rfc2047 coding
2435 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2437 NM/03 Allow underscore in dnslist lookups
2438 Fixes bug 1026. Patch from Graeme Fowler
2440 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2441 Code patches from Adam Ciarcinski of NetBSD.
2443 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2446 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2447 is logged, to avoid truncation. Patch from John Horne.
2449 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2450 Patch from Jakob Hirsch.
2452 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2453 SQL string expansion failure details.
2454 Patch from Andrey Oktyabrski.
2456 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2457 Patch from Simon Arlott.
2459 PP/09 New lookups functionality failed to compile on old gcc which rejects
2460 extern declarations in function scope.
2461 Patch from Oliver Fleischmann
2463 PP/10 Use sig_atomic_t for flags set from signal handlers.
2464 Check getgroups() return and improve debugging.
2465 Fixed developed for diagnosis in bug 927 (which turned out to be
2468 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2469 Patch from Mark Zealey.
2471 PP/12 Bugzilla 1056: Improved spamd server selection.
2472 Patch from Mark Zealey.
2474 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2475 Based on patch from Heiko Schlittermann.
2477 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2478 Patch from Uwe Doering, sign-off by Michael Haardt.
2480 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2481 variable declaration deep within a block. Bug and patch from
2484 PP/15 lookups-Makefile IRIX compatibility coercion.
2486 PP/16 Make DISABLE_DKIM build knob functional.
2488 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2489 Patch by Simon Arlott
2491 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2492 variable argument macros. Our copy now differs from upstream.
2498 TF/01 Failure to get a lock on a hints database can have serious
2499 consequences so log it to the panic log.
2501 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2502 controlled using the smtp_confirmation log selector.
2504 TF/03 Include the error message when we fail to unlink a spool file.
2506 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2507 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2508 for maintaining out-of-tree patches for some time.
2510 PP/01 Bugzilla 139: Documentation and portability issues.
2511 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2512 Handle per-OS dynamic-module compilation flags.
2514 PP/02 Let /dev/null have normal permissions.
2515 The 4.73 fixes were a little too stringent and complained about the
2516 permissions on /dev/null. Exempt it from some checks.
2517 Reported by Andreas M. Kirchwitz.
2519 PP/03 Report version information for many libraries, including
2520 Exim version information for dynamically loaded libraries. Created
2521 version.h, now support a version extension string for distributors
2522 who patch heavily. Dynamic module ABI change.
2524 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2525 privilege escalation vulnerability whereby the Exim run-time user
2526 can cause root to append content of the attacker's choosing to
2529 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2532 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2533 If dropping privileges for untrusted macros, we disabled normal logging
2534 on the basis that it would fail; for the Exim run-time user, this is not
2535 the case, and it resulted in successful deliveries going unlogged.
2536 Fixed. Reported by Andreas Metzler.
2542 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2543 only prepend for the Resent-* case. Fixes regression introduced in
2544 Exim 4.70 by NM/22 for Bugzilla 607.
2546 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2547 increasing numbers of administrators be bitten by this.
2549 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2551 PP/03 Bugzilla 994: added openssl_options main configuration option.
2553 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2555 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2557 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2559 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2560 without a peer certificate, leading to a segfault because of an
2561 assumption that peers always have certificates. Be a little more
2562 paranoid. Problem reported by Martin Tscholak.
2564 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2565 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2566 NB: ClamAV planning to remove STREAM in "middle of 2010".
2567 CL also introduces -bmalware, various -d+acl logging additions and
2568 more caution in buffer sizes.
2570 PP/09 Implemented reverse_ip expansion operator.
2572 PP/10 Bugzilla 937: provide a "debug" ACL control.
2574 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2576 PP/12 Bugzilla 973: Implement --version.
2578 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2580 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2582 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2584 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2585 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2586 ignore trailing whitespace.
2588 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2590 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2593 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2594 Notification from Dr Andrew Aitchison.
2596 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2597 ExtendedDetectionInfo response format.
2598 Notification from John Horne.
2600 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2603 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2604 XSL and documented dependency on system catalogs, with examples of how
2607 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2610 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2611 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2612 configuration file which is writeable by the Exim user or group.
2614 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2615 of configuration files to cover files specified with the -C option if
2616 they are going to be used with root privileges, not just the default
2619 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2620 option (effectively making it always true).
2622 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2623 files to be used while preserving root privileges.
2625 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2626 that rogue child processes cannot use them.
2628 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2629 run-time user, instead of root.
2631 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2632 Exim run-time user without dropping privileges.
2634 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2635 result string, instead of calling string_vformat() twice with the same
2638 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2639 for other users. Others should always drop root privileges if they use
2640 -C on the command line, even for a whitelisted configure file.
2642 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2644 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2650 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2651 $data_path, and $header_path variables; fixed documentation bugs and
2654 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2655 exipick to access non-standard spools, including the "frozen" queue
2658 NM/01 Bugzilla 965: Support mysql stored procedures.
2659 Patch from Alain Williams
2661 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2663 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2664 Patch from Andreas Metzler
2666 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2667 Patch from Kirill Miazine
2669 NM/05 Bugzilla 671: Added umask to procmail example.
2671 JJ/03 installed exipick 20100323.0, fixing doc bug
2673 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2674 directory. Notification and patch from Dan Rosenberg.
2676 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2678 TK/02 Improve log output when DKIM signing operation fails.
2680 MH/01 Treat the transport option dkim_domain as a colon separated
2681 list, not as a single string, and sign the message with each element,
2682 omitting multiple occurences of the same signer.
2684 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2685 Bugzilla 985, 986. Patch by Simon Arlott
2687 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2688 Patch by Simon Arlott
2690 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2691 MBX locking. Notification from Dan Rosenberg.
2697 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2699 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2701 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2703 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2705 NM/04 Bugzilla 915: Flag broken perl installation during build.
2711 TK/01 Added patch by Johannes Berg that expands the main option
2712 "spamd_address" if it starts with a dollar sign.
2714 TK/02 Write list of recipients to X-Envelope-Sender header when building
2715 the mbox-format spool file for content scanning (suggested by Jakob
2718 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2719 (http://www.dcc-servers.net/) support via dccifd. Activated by
2720 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2722 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2723 by Mark Daniel Reidel <mr@df.eu>.
2725 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2726 When building exim an external PCRE library is now needed -
2727 PCRE is a system library on the majority of modern systems.
2728 See entry on PCRE_LIBS in EDITME file.
2730 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2731 conversation. Added nologin parameter to request.
2732 Patch contributed by Kirill Miazine.
2734 TF/01 Do not log submission mode rewrites if they do not change the address.
2736 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2738 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2739 log files in place. Contributed by Roberto Lima.
2741 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2743 TF/03 Bugzilla 615: When checking the local_parts router precondition
2744 after a local_part_suffix or local_part_prefix option, Exim now
2745 does not use the address's named list lookup cache, since this
2746 contains cached lookups for the whole local part.
2748 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2749 Robert Millan. Documentation is in experimental-spec.txt.
2751 TF/04 Bugzilla 668: Fix parallel build (make -j).
2753 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2755 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2756 Patch provided by Jan Srzednicki.
2758 TF/05 Leading white space used to be stripped from $spam_report which
2759 wrecked the formatting. Now it is preserved.
2761 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2762 that they are available at delivery time.
2764 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2766 TF/08 TLS error reporting now respects the incoming_interface and
2767 incoming_port log selectors.
2769 TF/09 Produce a more useful error message if an SMTP transport's hosts
2770 setting expands to an empty string.
2772 NM/06 Bugzilla 744: EXPN did not work under TLS.
2773 Patch provided by Phil Pennock.
2775 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2776 Patch provided by Richard Godbee.
2778 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2779 acl_smtp_notquit, added index entry.
2781 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2782 Patch provided by Eugene Bujak.
2784 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2785 accept(). Patch provided by Maxim Dounin.
2787 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2788 Patch provided by Phil Pennock.
2790 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2792 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2793 Patch provided by Brad "anomie" Jorsch.
2795 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2796 Patch provided by Dean Brooks.
2798 TK/05 Add native DKIM support (does not depend on external libraries).
2800 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2801 Patch provided by Graeme Fowler.
2803 NM/16 Bugzilla 851: Documentation example syntax fix.
2805 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2807 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2810 NM/19 Bugzilla 745: TLS version reporting.
2811 Patch provided by Phil Pennock.
2813 NM/20 Bugzilla 167: bool: condition support.
2814 Patch provided by Phil Pennock.
2816 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2817 clients. Patch provided by Phil Pennock.
2819 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2820 Patch provided by Brad "anomie" Jorsch.
2822 NM/23 Bugzilla 687: Fix misparses in eximstats.
2823 Patch provided by Heiko Schlittermann.
2825 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2826 Patch provided by Heiko Schlittermann.
2828 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2829 plus update to original patch.
2831 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2833 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2834 Patch provided by David Brownlee.
2836 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2838 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2840 NM/30 Bugzilla 888: TLS documentation bugfixes.
2842 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2844 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2845 Unlike the original bugzilla I have changed all shell scripts in src tree.
2847 NM/33 Bugzilla 898: Transport filter timeout fix.
2848 Patch by Todd Rinaldo.
2850 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2851 Patch by Serge Demonchaux.
2853 NM/35 Bugzilla 39: Base64 decode bug fixes.
2854 Patch by Jakob Hirsch.
2856 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2858 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2860 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2862 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2868 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2869 ALT-N's libdkim that I have put here:
2870 http://duncanthrax.net/exim-experimental/
2872 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2873 were called 'true' and it seems that C99 defines that as a reserved
2874 keyword to be used with 'bool' variable types. That means you could
2875 not include C99-style headers which use bools without triggering
2876 build errors in sieve.c.
2878 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2879 as mailq or other aliases. Changed the --help handling significantly
2880 to do whats expected. exim_usage() emits usage/help information.
2882 SC/01 Added the -bylocaldomain option to eximstats.
2884 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2886 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2888 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2894 PH/01 Another patch from the Sieve maintainer.
2896 PH/02 When an IPv6 address is converted to a string for single-key lookup
2897 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2898 dots are used instead of colons so that keys in lsearch files need not
2899 contain colons. This was done some time before quoting was made available
2900 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2901 (notated using the quote facility) so as to distinguish them from IPv4
2902 keys. This meant that lookups for IP addresses in host lists did not work
2903 for iplsearch lookups.
2905 This has been fixed by arranging for IPv6 addresses to be expressed with
2906 colons if the lookup type is iplsearch. This is not incompatible, because
2907 previously such lookups could never work.
2909 The situation is now rather anomalous, since one *can* have colons in
2910 ordinary lsearch keys. However, making the change in all cases is
2911 incompatible and would probably break a number of configurations.
2913 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2916 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2917 conversion specification without a maximum field width, thereby enabling
2918 a rogue spamd server to cause a buffer overflow. While nobody in their
2919 right mind would setup Exim to query an untrusted spamd server, an
2920 attacker that gains access to a server running spamd could potentially
2921 exploit this vulnerability to run arbitrary code as the Exim user.
2923 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2924 $primary_hostname instead of what libspf2 thinks the hosts name is.
2926 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2927 a directory entry by the name of the lookup key. Previously, if a
2928 symlink pointed to a non-existing file or a file in a directory that
2929 Exim lacked permissions to read, a lookup for a key matching that
2930 symlink would fail. Now it is enough that a matching directory entry
2931 exists, symlink or not. (Bugzilla 503.)
2933 PH/03 The body_linecount and body_zerocount variables are now exported in the
2936 PH/04 Added the $dnslist_matched variable.
2938 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2939 This means they are set thereafter only if the connection becomes
2942 PH/06 Added the client_condition to authenticators so that some can be skipped
2943 by clients under certain conditions.
2945 PH/07 The error message for a badly-placed control=no_multiline_responses left
2946 "_responses" off the end of the name.
2948 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2950 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2951 (without spaces) instead of just copying the configuration text.
2953 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2955 PH/11 Added $max_received_linelength.
2957 PH/12 Added +ignore_defer and +include_defer to host lists.
2959 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2960 way in which PCRE > 7.0 is built.
2962 PH/14 Implemented queue_only_load_latch.
2964 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2965 MAIL command. The effect was to mangle the value on 64-bit systems.
2967 PH/16 Another patch from the Sieve maintainer.
2969 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2971 PH/18 If a system quota error occurred while trying to create the file for
2972 a maildir delivery, the message "Mailbox is full" was not appended to the
2973 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2974 only to a quota excession during the actual writing of the file.
2976 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2977 characters?) which causes problems in log lines. The DN values are now
2978 passed through string_printing() before being added to log lines.
2980 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2981 and InterBase are left for another time.)
2983 PH/21 Added message_body_newlines option.
2985 PH/22 Guard against possible overflow in moan_check_errorcopy().
2987 PH/23 POSIX allows open() to be a macro; guard against that.
2989 PH/24 If the recipient of an error message contained an @ in the local part
2990 (suitably quoted, of course), incorrect values were put in $domain and
2991 $local_part during the evaluation of errors_copy.
2997 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2998 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3001 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3002 issue a MAIL command.
3004 PH/02 In an ACL statement such as
3006 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3008 if a client was not listed at all, or was listed with a value other than
3009 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3010 the condition was not true (as it should be), so access was not denied.
3011 The bug was that the ! inversion was incorrectly passed on to the second
3012 item. This has been fixed.
3014 PH/03 Added additional dnslists conditions == and =& which are different from
3015 = and & when the dns lookup returns more than one IP address.
3017 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3018 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3020 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3021 FSYNC, which compiles an option called disable_fsync that allows for
3022 bypassing fsync(). The documentation is heavily laced with warnings.
3024 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3026 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3027 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3028 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3029 including adding "make clean"; (3) Added -fPIC when compiling the test
3030 dynamically loaded module, to get rid of a warning.
3032 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3033 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3034 = 0s. The bug is otherwise harmless.
3036 PH/07 There was a bug in the dovecot authenticator such that the value of
3037 $auth1 could be overwritten, and so not correctly preserved, after a
3038 successful authentication. This usually meant that the value preserved by
3039 the server_setid option was incorrect.
3041 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3043 PH/09 Installed PCRE release 7.0.
3045 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3046 run for batched SMTP input. It is now run at the start of every message
3047 in the batch. While fixing this I discovered that the process information
3048 (output by running exiwhat) was not always getting set for -bs and -bS
3049 input. This is fixed, and it now also says "batched" for BSMTP.
3051 PH/11 Added control=no_pipelining.
3053 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3054 patch, slightly modified), and move the expansion of helo_data till after
3055 the connection is made in the smtp transport (so it can use these
3058 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3060 PH/14 Added log_selector = +pid.
3062 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3064 PH/16 Add ${if forany and ${if forall.
3066 PH/17 Added dsn_from option to vary the From: line in DSNs.
3068 PH/18 Flush SMTP output before performing a callout, unless control =
3069 no_callout_flush is set.
3071 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3072 was true (the default) a successful delivery failed to delete the retry
3073 item, thus causing premature timeout of the address. The bug is now
3076 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3078 PH/21 Long custom messages for fakedefer and fakereject are now split up
3079 into multiline responses in the same way that messages for "deny" and
3080 other ACL rejections are.
3082 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3083 with slight modification.
3085 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3086 draft, changing the syntax and factoring some duplicate code".
3088 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3089 for deliveries of the second and subsequent messages over the same SMTP
3092 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3093 ${reduce, with only minor "tidies".
3095 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3097 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3098 expansion side effects.
3100 PH/27 When a message times out after an over-quota error from an Exim-imposed
3101 quota, the bounce message says "mailbox is full". This message was not
3102 being given when it was a system quota that was exceeded. It now should
3105 MH/03 Made $recipients available in local_scan(). local_scan() already has
3106 better access to the recipient list through recipients_list[], but
3107 $recipients can be useful in postmaster-provided expansion strings.
3109 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3110 in the case of a MAIL command with additional options following the
3111 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3112 were accidentally chopped off.
3114 PH/29 SMTP synchronization checks are implemented when a command is read -
3115 there is a check that no more input is waiting when there shouldn't be
3116 any. However, for some commands, a delay in an ACL can mean that it is
3117 some time before the response is written. In this time, more input might
3118 arrive, invalidly. So now there are extra checks after an ACL has run for
3119 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3120 pipelining has not been advertised.
3122 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3124 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3125 returned in the SMTP response when smtp_return_error_details was false.
3126 This has been fixed.
3128 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3129 instead of the C I/O that was originally supplied, because problems were
3130 reported on Solaris.
3132 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3133 Exim which did not show up earlier: it was assuming that a call to
3134 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3135 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3136 was a macro that became an assignment, so it seemed to work. This has
3137 changed to a proper function call with a void return, hence the compile
3138 error. Exim's code has been fixed.
3140 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3143 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3145 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3147 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3148 because it turns out to be too big or there is a timeout) there is no
3149 "Completed" line in the log. When some messages of this type were
3150 selected by exigrep, they were listed as "not completed". Others were
3151 picked up by some special patterns. I have improved the selection
3152 criteria to be more general.
3154 PH/38 The host_find_failed option in the manualroute router can now be set
3155 to "ignore", to completely ignore a host whose IP address cannot be
3156 found. If all hosts are ignored, the behaviour is controlled by the new
3157 host_all_ignored option.
3159 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3160 homing or because of multiple MX records with /mx) generated more than
3161 one IP address, and the following item turned out to be the local host,
3162 all the secondary addresses of the first item were incorrectly removed
3163 from the list, along with the local host and any following hosts (which
3164 is what is supposed to happen).
3166 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3167 whoever called Exim into the -H file. In the case of the daemon it was
3168 behaving confusingly. When first started, it used values for whoever
3169 started the daemon, but after a SIGHUP it used the Exim user (because it
3170 calls itself on a restart). I have changed the code so that it now always
3173 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3174 message are rejected with the same error (e.g. no authentication or bad
3175 sender address), and a DATA command is nevertheless sent (as can happen
3176 with PIPELINING or a stupid MUA), the error message that was given to the
3177 RCPT commands is included in the rejection of the DATA command. This is
3178 intended to be helpful for MUAs that show only the final error to their
3181 PH/42 Another patch from the Sieve maintainer.
3183 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3184 Eximstats - Fixed some broken HTML links and added missing column headers
3186 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3187 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3189 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3191 PH/43 Yet another patch from the Sieve maintainer.
3193 PH/44 I found a way to check for a TCP/IP connection going away before sending
3194 the response to the final '.' that terminates a message, but only in the
3195 case where the client has not sent further data following the '.'
3196 (unfortunately, this is allowed). However, in many cases there won't be
3197 any further data because there won't be any more messages to send. A call
3198 to select() can be used: if it shows that the input is "ready", there is
3199 either input waiting, or the socket has been closed. An attempt to read
3200 the next input character can distinguish the two cases. Previously, Exim
3201 would have sent an OK response which the client would never have see.
3202 This could lead to message repetition. This fix should cure that, at
3203 least in a lot of common cases.
3205 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3206 advertised in response to EHLO.
3212 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3213 fixed by 4.65/MH/01 (is this a record?) are fixed:
3215 (i) An empty string was always treated as zero by the numeric comparison
3216 operators. This behaviour has been restored.
3218 (ii) It is documented that the numeric comparison operators always treat
3219 their arguments as decimal numbers. This was broken in that numbers
3220 starting with 0 were being interpreted as octal.
3222 While fixing these problems I realized that there was another issue that
3223 hadn't been noticed. Values of message_size_limit (both the global option
3224 and the transport option) were treated as octal if they started with 0.
3225 The documentation was vague. These values are now always treated as
3226 decimal, and I will make that clear in the documentation.
3232 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3233 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3236 MH/01 Don't check that the operands of numeric comparison operators are
3237 integers when their expansion is in "skipping" mode (fixes bug
3238 introduced by 4.64-PH/07).
3240 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3241 child addresses, Exim now panics and dies. Previously, because the count
3242 is held in a short int, deliveries were likely to be lost. As such a
3243 large number of recipients for a single message is ridiculous
3244 (performance will be very, very poor), I have chosen to impose a limit
3245 rather than extend the field.
3251 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3252 leftover -K file (the existence of which was triggered by #402).
3253 While we were at it, introduced process PID as part of the -K
3254 filename. This should rule out race conditions when creating
3257 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3258 processing considerably. Previous code took too long for large mails,
3259 triggering a timeout which in turn triggers #401.
3261 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3262 in the DK code in transports.c. sendfile() is not really portable,
3263 hence the _LINUX specificness.
3265 TF/01 In the add_headers option to the mail command in an Exim filter,
3266 there was a bug that Exim would claim a syntax error in any
3267 header after the first one which had an odd number of characters
3270 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3271 callout verification, Exim cached a "reject" for the entire domain. This
3272 is correct for most verifications, but it is not correct for a recipient
3273 verification with use_sender or use_postmaster set, because in that case
3274 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3275 case of MAIL FROM:<> rejection from other early rejections (e.g.
3276 rejection of HELO). When verifying a recipient using a non-null MAIL
3277 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3278 Whatever the result of the callout, the value of the domain cache is
3279 left unchanged (for any other kind of callout, getting as far as trying
3280 RCPT means that the domain itself is ok).
3282 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3285 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3286 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3287 session, the daemon ignores ECONNECT errors and logs others; it now
3288 ignores EPIPE as well.
3290 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3291 (quoted-printable decoding).
3293 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3294 later the small subsequent patch to fix an introduced bug.
3296 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3298 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3300 PH/08 An error is now given if message_size_limit is specified negative.
3302 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3303 to be given (somewhat) arbitrary names.
3305 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3308 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3309 miscellaneous code fixes
3311 PH/10 Added the log_reject_target ACL modifier to specify where to log
3314 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3315 hostname. This is wrong, because it relates to the incoming message (and
3316 probably the interface on which it is arriving) and not to the outgoing
3317 callout (which could be using a different interface). This has been
3318 changed to use the value of the helo_data option from the smtp transport
3319 instead - this is what is used when a message is actually being sent. If
3320 there is no remote transport (possible with a router that sets up host
3321 addresses), $smtp_active_hostname is used.
3323 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3324 tweaks were necessary in order to get it to work (see also 21 below):
3325 (a) The code assumed that strncpy() returns a negative number on buffer
3326 overflow, which isn't the case. Replaced with Exim's string_format()
3328 (b) There were several signed/unsigned issues. I just did the minimum
3329 hacking in of casts. There is scope for a larger refactoring.
3330 (c) The code used strcasecmp() which is not a standard C function.
3331 Replaced with Exim's strcmpic() function.
3332 (d) The code set only $1; it now sets $auth1 as well.
3333 (e) A simple test gave the error "authentication client didn't specify
3334 service in request". It would seem that Dovecot has changed its
3335 interface. Fortunately there's a specification; I followed it and
3336 changed what the client sends and it appears to be working now.
3338 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3341 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3342 address A is aliased to B and C, where B exists and C does not. Without
3343 -v the output is "A verified" because verification stops after a
3344 successful redirection if more than one address is generated. However,
3345 with -v the child addresses are also verified. Exim was outputting "A
3346 failed to verify" and then showing the successful verification for C,
3347 with its parentage. It now outputs "B failed to verify", showing B's
3348 parentage before showing the successful verification of C.
3350 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3351 look up a TXT record in a specific list after matching in a combined
3354 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3355 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3356 they consult the DNS. I had assumed they would set it the way they
3357 wanted; and indeed my experiments on Linux seem to show that in some
3358 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3359 To be on the safe side, however, I have now made the interface to
3360 host_find_byname() similar to host_find_bydns(), with an argument
3361 containing the DNS resolver options. The host_find_byname() function now
3362 sets these options at its start, just as host_find_bydns() does. The smtp
3363 transport options dns_qualify_single and dns_search_parents are passed to
3364 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3365 of host_find_byname() use the default settings of RES_DEFNAMES
3366 (qualify_single) but not RES_DNSRCH (search_parents).
3368 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3369 spool_read_header() do less string testing, by means of a preliminary
3370 switch on the second character of optional "-foo" lines. (This is
3371 overdue, caused by the large number of possibilities that now exist.
3372 Originally there were few.) While I was there, I also converted the
3373 str(n)cmp tests so they don't re-test the leading "-" and the first
3374 character, in the hope this might squeeze out yet more improvement.
3376 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3377 flag allowing group syntax was set by the header_syntax check but not
3378 turned off, possible causing trouble later; (2) The flag was not being
3379 set at all for the header_verify test, causing "group"-style headers to
3380 be rejected. I have now set it in this case, and also caused header_
3381 verify to ignore an empty address taken from a group. While doing this, I
3382 came across some other cases where the code for allowing group syntax
3383 while scanning a header line wasn't quite right (mostly, not resetting
3384 the flag correctly in the right place). These bugs could have caused
3385 trouble for malformed header lines. I hope it is now all correct.
3387 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3388 with the "reply" argument non-NULL. The code, however (which originally
3389 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3390 but it didn't always do it. This confused somebody who was copying the
3391 code for some other use. I have removed all the tests.
3393 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3394 feature that was used to support insecure browsers during the U.S. crypto
3395 embargo. It requires special client support, and Exim is probably the
3396 only MTA that supported it -- and would never use it because real RSA is
3397 always available. This code has been removed, because it had the bad
3398 effect of slowing Exim down by computing (never used) parameters for the
3399 RSA_EXPORT functionality.
3401 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3402 authenticator to fail if there's a tab character in the incoming data
3403 (there should never be unless someone is messing about, as it's supposed
3404 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3405 if the connection is using TLS or if the remote IP is the same as the
3406 local IP, and the "valid-client-cert option" if a client certificate has
3409 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3410 authenticators. This can be used for authorization after authentication
3411 succeeds. (In the case of plaintext, it servers for both authentication
3414 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3415 if any retry times were supplied.
3417 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3418 connection, where there is no client IP address to check. In this
3419 situation, the verify now always succeeds.
3421 PH/25 Applied John Jetmore's -Mset patch.
3423 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3425 PH/27 In a string expansion for a processed (not raw) header when multiple
3426 headers of the same name were present, leading whitespace was being
3427 removed from all of them, but trailing whitespace was being removed only
3428 from the last one. Now trailing whitespace is removed from each header
3429 before concatenation. Completely empty headers in a concatenation (as
3430 before) are ignored.
3432 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3433 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3435 PH/29 [Removed. This was a change that I later backed out, and forgot to
3436 correct the ChangeLog entry (that I had efficiently created) before
3437 committing the later change.]
3439 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3440 address errors (4xx response to RCPT) over the same connection as other
3441 messages routed to the same hosts. Such deliveries are always "forced",
3442 so retry times are not inspected. This resulted in far too many retries
3443 for the affected addresses. The effect occurred only when there were more
3444 hosts than the hosts_max_try setting in the smtp transport when it had
3445 the 4xx errors. Those hosts that it had tried were not added to the list
3446 of hosts for which the message was waiting, so if all were tried, there
3447 was no problem. Two fixes have been applied:
3449 (i) If there are any address or message errors in an SMTP delivery, none
3450 of the hosts (tried or untried) are now added to the list of hosts
3451 for which the message is waiting, so the message should not be a
3452 candidate for sending over the same connection that was used for a
3453 successful delivery of some other message. This seems entirely
3454 reasonable: after all the message is NOT "waiting for some host".
3455 This is so "obvious" that I'm not sure why it wasn't done
3456 previously. Hope I haven't missed anything, but it can't do any
3457 harm, as the worst effect is to miss an optimization.
3459 (ii) If, despite (i), such a delivery is accidentally attempted, the
3460 routing retry time is respected, so at least it doesn't keep
3461 hammering the server.
3463 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3464 in ${readsocket because some servers need this prod.
3466 PH/32 Added some extra debug output when updating a wait-xxx database.
3468 PH/33 The hint "could be header name not terminated by colon", which has been
3469 given for certain expansion errors for a long time, was not being given
3470 for the ${if def:h_colon_omitted{... case.
3472 PH/34 The spec says: "With one important exception, whenever a domain list is
3473 being scanned, $domain contains the subject domain." There was at least
3474 one case where this was not true.
3476 PH/35 The error "getsockname() failed: connection reset by peer" was being
3477 written to the panic log as well as the main log, but it isn't really
3478 panic-worthy as it just means the connection died rather early on. I have
3479 removed the panic log writing for the ECONNRESET error when getsockname()
3482 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3483 runs only) independently of the message's sender address. This meant
3484 that, if the 4xx error was in fact related to the sender, a different
3485 message to the same recipient with a different sender could confuse
3486 things. In particular, this can happen when sending to a greylisting
3487 server, but other circumstances could also provoke similar problems.
3488 I have changed the default so that the retry time for these errors is now
3489 based a combination of the sender and recipient addresses. This change
3490 can be overridden by setting address_retry_include_sender=false in the
3493 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3494 remote server are returned as part of bounce messages. This was not
3495 happening for LMTP over a pipe (the lmtp transport), but now it is the
3496 same for both kinds of LMTP.
3498 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3499 in header lines that were in fact CNAMEs. This is no longer the case.
3501 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3502 and queue runs started by the daemon processed all messages. This has
3503 been fixed so that -R and -S can now usefully be given with -q<time>.
3505 PH/40 Import PCRE release 6.7 (fixes some bugs).
3507 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3509 PH/42 Give an error if -q is specified more than once.
3511 PH/43 Renamed the variables $interface_address and $interface_port as
3512 $received_ip_address and $received_port, to make it clear that these
3513 values apply to message reception, and not to the outgoing interface when
3514 a message is delivered. (The old names remain recognized, of course.)
3516 PH/44 There was no timeout on the connect() call when using a Unix domain
3517 socket in the ${readsocket expansion. There now is.
3519 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3520 be meaningful with "accept".
3522 SC/01 Eximstats V1.43
3523 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3525 SC/02 Eximstats V1.44
3526 Use a glob alias rather than an array ref in the generated
3527 parser. This improves both readability and performance.
3529 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3530 Collect SpamAssassin and rejection statistics.
3531 Don't display local sender or destination tables unless
3532 there is data to show.
3533 Added average volumes into the top table text output.
3535 SC/04 Eximstats V1.46
3536 Collect data on the number of addresses (recipients)
3537 as well as the number of messages.
3539 SC/05 Eximstats V1.47
3540 Added 'Message too big' to the list of mail rejection
3541 reasons (thanks to Marco Gaiarin).
3543 SC/06 Eximstats V1.48
3544 Mainlog lines which have GMT offsets and are too short to
3545 have a flag are now skipped.
3547 SC/07 Eximstats V1.49 (Alain Williams)
3548 Added the -emptyok flag.
3550 SC/08 Eximstats V1.50
3551 Fixes for obtaining the IP address from reject messages.
3553 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3554 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3555 whitespace changes from 4.64-PH/27
3557 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3560 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3561 are found, allow negative numbers in numeric criteria)
3563 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3565 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3566 to match changes made in 4.64-PH/43
3568 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3570 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3571 "domain" is actually an IP address, and force a failure. This locks out
3572 those revolvers/nameservers that support "A-for-A" lookups, in
3573 contravention of the specifications.
3575 PH/48 When a host name was looked up from an IP address, and the subsequent
3576 forward lookup of the name timed out, the host name was left in
3577 $sender_host_name, contrary to the specification.
3579 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3580 restricted to single-key lookups, Exim was not diagnosing an error if
3581 * or *@ was used with a query-style lookup.
3583 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3585 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3586 long ago, but noone interested enough thought of it. Let's just say that
3587 the "1.1" means that there are some new functions that weren't there at
3588 some point in the past.
3590 PH/51 Error processing for expansion failure of helo_data from an smtp
3591 transport during callout processing was broken.
3593 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3594 tested/used via the -bh/-bhc/-bs options.
3596 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3597 bug, fixed in subsequent PCRE releases).
3599 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3600 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3602 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3608 SC/01 Use a glob alias rather than an array ref in eximstats generated
3609 parser. This improves both readability and performance.
3611 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3612 Don't display local sender or destination tables in eximstats unless
3613 there is data to show.
3614 Added average volumes into the eximstats top table text output.
3616 SC/03 Collect data on the number of addresses (recipients) as well
3617 as the number of messages in eximstats.
3619 TF/01 Correct an error in the documentation for the redirect router. Exim
3620 does (usually) call initgroups() when daemonizing.
3622 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3623 with consistent privilege compared to when running as a daemon.
3625 TF/03 Note in the spec that $authenticated_id is not set for local
3626 submissions from trusted users.
3628 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3629 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3631 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3632 by adding some example configuration directives to the default
3633 configuration file. A little bit of work is required to uncomment the
3634 directives and define how usernames and passwords are checked, but
3635 there is now a framework to start from.
3637 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3638 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3639 without this. I don't know how relevant this is to other LDAP libraries.
3641 PH/02 Add the verb name to the "unknown ACL verb" error.
3643 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3645 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3647 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3648 directory not expanded when it should be if an expanded home directory
3649 was set for the address (which is overridden by the transport).
3651 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3654 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3655 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3656 because it is too late at that time, and has no effect.
3658 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3659 security issue with \' (bugzilla #107). I could not use the
3660 PQescapeStringConn() function, because it needs a PGconn value as one of
3663 PH/08 When testing addresses using -bt, indicate those final addresses that
3664 are duplicates that would not cause an additional delivery. At least one
3665 person was confused, thinking that -bt output corresponded to deliveries.
3666 (Suppressing duplicates isn't a good idea as you lose the information
3667 about possibly different redirections that led to the duplicates.)
3669 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3670 systems where poll() doesn't work, in particular OS X.
3672 PH/10 Added more information to debugging output for retry time not reached.
3674 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3675 operations in malware.c.
3677 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3680 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3681 syslog_duplication set false, log lines that would normally be written
3682 both the the main log and to the reject log were not written to syslog at
3685 PH/14 In the default configuration, change the use of "message" in ACL warn
3686 statements to "add_header".
3688 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3689 not followed by a command (e.g. "seen endif").
3691 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3692 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3695 PH/17 Added extra conditions to the default value of delay_warning_condition
3699 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3700 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3701 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3704 The Auto-Submitted: and various List- headers are standardised, whereas I
3705 don't think Precedence: ever was.
3707 PH/18 Refactored debugging code in route_finduser() to show more information,
3708 in particular, the error code if getpwnam() issues one.
3710 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3711 This is apparently needed in addition to the PH/07 change above to avoid
3712 any possible encoding problems.
3714 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3715 but not after initializing Perl.
3717 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3718 output them only if debugging. By default they are written stderr,
3719 apparently, which is not desirable.
3721 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3724 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3727 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3729 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3730 authenticated or an ident call has been made. Suppress the default
3731 values for $authenticated_id and $authenticated_sender (but permit -oMai
3732 and -oMas) when testing with -bh.
3734 PH/24 Re-jigged the order of the tests in the default configuration so that the
3735 tests for valid domains and recipients precede the DNS black list and CSA
3736 tests, on the grounds that those ones are more expensive.
3738 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3739 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3740 This bug exists in every version of Exim that I still have, right back to
3743 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3744 However, an attempt to turn on case-sensitivity in a regex key by
3745 including (?-i) didn't work because the subject string was already
3746 lowercased, and the effects were non-intuitive. It turns out that a
3747 one-line patch can be used to allow (?-i) to work as expected.
3753 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3754 other effects) broke the use of negated acl sub-conditions.
3756 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3759 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3760 "Deny" causes Exim to reject the incoming connection with a 554 error.
3761 Unfortunately, if there is a major crisis, such as a disk failure,
3762 tcp-wrappers gives "deny", whereas what one would like would be some
3763 kind of temporary error. A kludge has been added to help with this.
3764 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3765 554 error is used if errno is still zero or contains ENOENT (which occurs
3766 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3769 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3771 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3772 errors. Otherwise a message that provokes a temporary error (when other
3773 messages do not) can cause a whole host to time out.
3775 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3776 addresses were routed directly to files or pipes from a redirect router.
3777 File deliveries just didn't batch; pipe deliveries might have suffered
3780 PH/06 A failure to get a lock for a hints database would erroneously always say
3781 "Failed to get write lock", even when it was really a read lock.
3783 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3784 of 0600. This has been changed to use the value of the lockfile_mode
3785 option (which defaults to 0600).
3787 PH/08 Applied small patch from the Sieve maintainer.
3789 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3790 folder from quota calculations, a direct delivery into this folder messed
3791 up the contents of the maildirsize file. This was because the regex was
3792 used only to exclude .Trash (or whatever) when the size of the mailbox
3793 was calculated. There was no check that a delivery was happening into an
3794 excluded directory. This bug has been fixed by ignoring all quota
3795 processing for deliveries into excluded directories.
3797 PH/10 Added the maildirfolder_create_regex option to appendfile.
3803 PH/01 The code for finding all the local interface addresses on a FreeBSD
3804 system running IPv6 was broken. This may well have applied to all BSD
3805 systems, as well as to others that have similar system calls. The broken
3806 code found IPv4 interfaces correctly, but gave incorrect values for the
3807 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3808 that it would not match correctly against @[] and not recognize the IPv6
3811 PH/02 The ipliteral router was not recognizing addresses of the form user@
3812 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3814 PH/03 Added disable_ipv6.
3816 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3817 decoded form, because it is most often used to construct To: headers
3818 lines in autoreplies, and the decoded form may well be syntactically
3819 invalid. However, $reply_address has leading white space removed, and all
3820 newlines turned into spaces so that the autoreply transport does not
3823 PH/05 If group was specified without a user on a router, and no group or user
3824 was specified on a transport, the group from the router was ignored.
3826 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3827 for visible compile-time settings that can be used to change these
3828 numbers, for those that want even more. Backwards compatibility with old
3829 spool files has been maintained. However, going back to a previous Exim
3830 release will lost any variables that are in spool files.
3832 PH/07 Two small changes when running in the test harness: increase delay when
3833 passing a TCP/IP connection to a new process, in case the original
3834 process has to generate a bounce, and remove special handling of
3835 127.0.0.2 (sic), which is no longer necessary.
3837 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3838 be the same on different OS.
3840 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3843 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3844 whether --show-vars was specified or not
3846 JJ/02 exipick: Added support for new ACL variable spool format introduced
3849 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3850 syntactically invalid From: or Reply-to: line, and a filter used this to
3851 generate an autoreply, and therefore failed to obtain an address for the
3852 autoreply, Exim could try to deliver to a non-existent relative file
3853 name, causing unrelated and misleading errors. What now happens is that
3854 it logs this as a hard delivery error, but does not attempt to create a
3857 PH/11 The exinext utility has a -C option for testing purposes, but although
3858 the given file was scanned by exinext itself; it wasn't being passed on
3859 when Exim was called.
3861 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3862 an end-of-file indication when reading a command response.
3864 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3865 compiled. In many other places in Exim, IPv6 addresses are always
3866 recognized, so I have changed this. It also means that IPv4 domain
3867 literals of the form [IPV4:n.n.n.n] are now always recognized.
3869 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3870 used if the router is not running as root, for example, when verifying at
3871 ACL time, or when using -bh. The debugging output from this situation was
3872 non-existent - all you got was a failure to exec. I have made two
3875 (a) Failures to set uid/gid, the current directory, or a process leader
3876 in a subprocess such as that created by queryprogram now generate
3877 suitable debugging output when -d is set.
3879 (b) The queryprogram router detects when it is not running as root,
3880 outputs suitable debugging information if -d is set, and then runs
3881 the subprocess without attempting to change uid/gid.
3883 PH/15 Minor change to Makefile for building test_host (undocumented testing
3886 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3887 additional section of a DNS packet that returns MX or SRV records.
3888 Instead, it always explicitly searches for A/AAAA records. This avoids
3889 major problems that occur when a DNS server includes only records of one
3890 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3891 fixed another bug: if SRV records were looked up and the corresponding
3892 address records were *not* found in the additional section, the port
3893 values from the SRV records were lost.
3895 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3896 using the correct key (the original address) when searching the retry
3897 rules in order to find which one to use for generating the retry hint.
3899 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3900 adding the default one. Similarly, if it contains a Reply-To: header, the
3901 errors_reply_to option, if set, is not used.
3903 PH/19 When calculating a retry time, Exim used to measure the "time since
3904 failure" by looking at the "first failed" field in the retry record. Now
3905 it does not use this if it is later than than the arrival time of the
3906 message. Instead it uses the arrival time. This makes for better
3907 behaviour in cases where some deliveries succeed, thus re-setting the
3908 "first failed" field. An example is a quota failure for a huge message
3909 when small messages continue to be delivered. Without this change, the
3910 "time since failure" will always be short, possible causing more frequent
3911 delivery attempts for the huge message than are intended.
3912 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3914 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3915 $1, $2, $3) because the numerical variables can be reset during some
3916 expansion items (e.g. "match"), thereby losing the authentication data.
3918 PH/21 Make -bV show the size of off_t variables so that the test suite can
3919 decide whether to run tests for quotas > 2G.
3921 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3922 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3923 filecount value is greater than 2G or if a quota value is greater than 2G
3924 on a system where the size of off_t is not greater than 4, a panic error
3927 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3928 never match. The debug and -bh output now contains an explicit error
3929 message indicating a malformed IPv4 address or mask.
3931 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3932 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3933 PH/23 above applies.
3935 PH/25 Do not write to syslog when running in the test harness. The only
3936 occasion when this arises is a failure to open the main or panic logs
3937 (for which there is an explicit test).
3939 PH/26 Added the /no_tell option to "control=freeze".
3941 PH/27 If a host name lookup failed very early in a connection, for example, if
3942 the IP address matched host_lookup and the reverse lookup yielded a name
3943 that did not have a forward lookup, an error message of the form "no IP
3944 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3945 could be logged. Now it outputs the IP address instead of "NULL".
3947 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3948 allows the sender and the authenticated sender to be set when
3949 submitting a message from within Exim. Since child_open_exim() is
3950 documented for local_scan(), the new function should be too.
3952 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3953 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3954 results in an empty string is now treated as unset.
3956 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3958 PH/31 Added sender_verify_fail logging option.
3960 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3961 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3962 tidied the source and removed it altogether.
3964 PH/33 When a queue run was abandoned because the load average was too high, a
3965 log line was always written; now it is written only if the queue_run log
3966 selector is set. In addition, the log line for abandonment now contains
3967 information about the queue run such as the pid. This is always present
3968 in "start" and "stop" lines but was omitted from the "abandon" line.
3970 PH/34 Omit spaces between a header name and the colon in the error message that
3971 is given when verify = headers_syntax fails (if there are lots of them,
3972 the message gets confusing).
3974 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3975 names, as there are now some PTR records that contain slashes. This check
3976 is only to protect against broken name servers that fall over on strange
3977 characters, so the fact that it applies to all lookups doesn't matter.
3979 PH/36 Now that the new test suite is complete, we can remove some of the
3980 special code in Exim that was needed for the old test suite. For example,
3981 sorting DNS records because real resolvers return them in an arbitrary
3982 order. The new test suite's fake resolver always returns records in the
3985 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3986 bounces) except when queue_only is set, to avoid logging races between
3987 the different processes.
3989 PH/38 Panic-die if .include specifies a non-absolute path.
3991 PH/39 A tweak to the "H" retry rule from its user.
3993 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3994 a label. They prevented compilation on older perls.
3996 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3997 a warning to be raised on newish perls.
3999 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4000 on queue. Changes to match documented behaviour of showing count of
4001 messages matching specified criteria.
4003 PH/40 Changed the default ident timeout from 30s to 5s.
4005 PH/41 Added support for the use of login_cap features, on those BSD systems
4006 that have them, for controlling the resources used by pipe deliveries.
4008 PH/42 The content-scanning code uses fopen() to create files in which to put
4009 message data. Previously it was not paying any attention to the mode of
4010 the files. Exim runs with umask(0) because the rest of the code creates
4011 files with open(), and sets the required mode explicitly. Thus, these
4012 files were ending up world-writeable. This was not a big issue, because,
4013 being within the spool directory, they were not world-accessible. I have
4014 created a function called modefopen, which takes an additional mode
4015 argument. It sets umask(777), creates the file, chmods it to the required
4016 mode, then resets the umask. All the relevant calls to fopen() in the
4017 content scanning code have been changed to use this function.
4019 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4020 to 24 hours. This avoids potential overflow problems when processing G
4021 and H retry rules. I suspect nobody ever tinkers with this value.
4023 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4025 PH/45 When the plaintext authenticator is running as a client, the server's
4026 challenges are checked to ensure they are valid base64 strings. By
4027 default, the authentication attempt is cancelled if an invalid string is
4028 received. Setting client_ignore_invalid_base64 true ignores these errors.
4029 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4030 they are received. Thus, the responses can be made to depend on the
4031 challenges. If an invalid string is ignored, an empty string is placed in
4034 PH/46 Messages that are created by the autoreply transport now contains a
4035 References: header, in accordance with RFCs 2822 and 3834.
4037 PH/47 Added authenticated_sender_force to the smtp transport.
4039 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4041 PH/49 Installed latest patch from the Sieve maintainer.
4043 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4044 was also set, the appendfile transport was unnecessarily scanning a
4045 directory of message files (e.g. for maildir delivery) to find the count
4046 of files (along with the size), even though it did not need this
4047 information. It now does the scan only if it needs to find either the
4048 size of the count of files.
4050 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4052 PH/52 Two bugs concerned with error handling when the smtp transport is
4055 (i) Exim was not creating retry information for temporary errors given
4056 for individual recipients after the DATA command when the smtp transport
4057 was used in LMTP mode. This meant that they could be retried too
4058 frequently, and not timed out correctly.
4060 (ii) Exim was setting the flag that allows error details to be returned
4061 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4062 recipients that were returned after the DATA command.
4064 PH/53 This is related to PH/52, but is more general: for any failing address,
4065 when detailed error information was permitted to be returned to the
4066 sender, but the error was temporary, then after the final timeout, only
4067 "retry timeout exceeded" was returned. Now it returns the full error as
4068 well as "retry timeout exceeded".
4070 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4071 do this, and (what is worse) MTAs that accept it.
4073 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4074 will now be deprecated.
4076 PH/56 New os.c-cygwin from the Cygwin maintainer.
4078 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4079 formats (previously only available in exim formats via -bpr, -bpru,
4080 and -bpra. Now also available in native and exiqgrep formats)
4082 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4083 with very large, slow to parse queues
4085 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4087 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4089 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4090 responses to authentication challenges, though it was showing the
4091 challenges; (ii) I've removed the CR characters from the debug output for
4094 PH/58 Allow for the insertion of a newline as well as a space when a string
4095 is turned into more than one encoded-word during RFC 2047 encoding. The
4096 Sieve code now uses this.
4098 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4099 data_4xx, lost_connection, tls_required.
4101 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4102 message was being sent as an SMTP response.
4104 PH/61 Add -l and -k options to exicyclog.
4106 PH/62 When verifying, if an address was redirected to one new address, so that
4107 verification continued, and the new address failed or deferred after
4108 having set something in $address_data, the value of $address_data was not
4109 passed back to the ACL. This was different to the case when no
4110 redirection occurred. The value is now passed back in both cases.
4112 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4113 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4114 use login_cap.h, so on its own it isn't the distinguishing feature. The
4115 new name refers directly to the setclassresources() function.
4117 PH/65 Added configuration files for NetBSD3.
4119 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4121 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4122 is preferred over IPv4.
4124 PH/68 The bounce_return_message and bounce_return_body options were not being
4125 honoured for bounces generated during the reception of non-SMTP messages.
4126 In particular, this applied to messages rejected by the ACL. This bug has
4127 been fixed. However, if bounce_return_message is true and bounce_return_
4128 body is false, the headers that are returned for a non-SMTP message
4129 include only those that have been read before the error was detected.
4130 (In the case of an ACL rejection, they have all been read.)
4132 PH/69 The HTML version of the specification is now built in a directory called
4133 spec_html instead of spec.html, because the latter looks like a path with
4134 a MIME-type, and this confuses some software.
4136 PH/70 Catch two compiler warnings in sieve.c.
4138 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4139 function verify_get_ident() calls ip_connect() to connect a socket, but
4140 if the "connect()" function timed out, ip_connect() used to close the
4141 socket. However, verify_get_ident() also closes the socket later, and in
4142 between Exim writes to the log, which may get opened at this point. When
4143 the socket was closed in ip_connect(), the log could get the same file
4144 descriptor number as the socket. This naturally causes chaos. The fix is
4145 not to close the socket in ip_connect(); the socket should be closed by
4146 the function that creates it. There was only one place in the code where
4147 this was missing, in the iplookup router, which I don't think anybody now
4148 uses, but I've fixed it anyway.
4150 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4151 well as to direct DNS lookups. Otherwise the handling of names in host
4152 lists is inconsistent and therefore confusing.
4158 PH/01 Two changes to the default runtime configuration:
4160 (1) Move the checks for relay_from_hosts and authenticated clients from
4161 after to before the (commented out) DNS black list checks.
4163 (2) Add control=submission to the relay_from_hosts and authenticated
4164 clients checks, on the grounds that messages accepted by these
4165 statements are most likely to be submissions.
4167 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4169 (1) Generate an error if the third argument for the ${prvs expansion is
4172 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4175 (3) Reset the variables that are obtained from the first argument of
4176 ${prvscheck and used in the second argument before leaving the code,
4177 because their memory is reclaimed, so using them afterwards may do
4180 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4181 one (it's much easier than Tom thought :-).
4183 (5) Because of (4), we can now allow for the use of $prvscheck_result
4184 inside the third argument.
4186 PH/03 For some reason, the default setting of PATH when running a command from
4187 a pipe transport was just "/usr/bin". I have changed it to
4190 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4191 anything to be listed in the output from -bV.
4193 PH/05 When a filter generated an autoreply, the entire To: header line was
4194 quoted in the delivery log line, like this:
4196 => >A.N.Other <ano@some.domain> <original@ddress> ...
4198 This has been changed so that it extracts the operative address. There
4199 may be more than one such address. If so, they are comma-separated, like
4202 => >ano@some.domain,ona@other.domain <original@ddress> ...
4204 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4205 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4206 not being looked up in the rDNS to get a host name, Exim was showing the
4207 IP address twice in Received: lines, even though the IP addresses were
4208 identical. For example:
4210 Received: from [1.2.3.4] (helo=[1.2.3.4])
4212 However, if the real host name was known, it was omitting the HELO data
4213 if it matched the actual IP address. This has been tidied up so that it
4214 doesn't show the same IP address twice.
4216 PH/07 When both +timestamp and +memory debugging was on, the value given by
4217 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4218 called by the debug printing, thereby overwriting the timestamp buffer.
4219 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4221 PH/08 When the original message was included in an autoreply transport, it
4222 always said "this is a copy of the message, including all the headers",
4223 even if body_only or headers_only was set. It now gives an appropriate
4226 PH/09 Applied a patch from the Sieve maintainer which:
4228 o fixes some comments
4229 o adds the (disabled) notify extension core
4230 o adds some debug output for the result of if/elsif tests
4231 o points to the current vacation draft in the documentation
4232 and documents the missing references header update
4236 o fixes a bug in processing the envelope test (when testing
4237 multiple envelope elements, the last element determined the
4240 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4241 Electronic Mail") by including:
4243 Auto-submitted: auto-generated
4245 in the messages that it generates (bounce messages and others, such as
4246 warnings). In the case of bounce messages for non-SMTP messages, there was
4247 also a typo: it was using "Auto_submitted" (underscore instead of
4248 hyphen). Since every message generated by Exim is necessarily in response
4249 to another message, thes have all been changed to:
4251 Auto-Submitted: auto-replied
4253 in accordance with these statements in the RFC:
4255 The auto-replied keyword:
4257 - SHOULD be used on messages sent in direct response to another
4258 message by an automatic process,
4260 - MUST NOT be used on manually-generated messages,
4262 - MAY be used on Delivery Status Notifications (DSNs) and Message
4263 Disposition Notifications (MDNs),
4265 - MUST NOT be used on messages generated by automatic or periodic
4266 processes, except for messages which are automatic responses to
4269 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4270 to the default Received: header definition.
4272 PH/12 Added log selector acl_warn_skipped (default on).
4274 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4275 variables because (a) they are in the wrong storage pool and (b) even if
4276 they were copied, it wouldn't work properly because of the caching.
4278 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4279 checking when decoding. Apparently there are clients that generate
4280 overlong encoded strings. Why am I not surprised?
4282 PH/15 If the first argument of "${if match_address" was not empty, but did not
4283 contain an "@" character, Exim crashed. Now it writes a panic log message
4284 and treats the condition as false.
4286 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4288 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4289 extension "envelope-auth". The code is finished and in agreement with
4290 other implementations, but there is no documentation so far and in fact,
4291 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4292 not changing the active code.
4294 Print executed "if" and "elsif" statements when debugging is used. This
4295 helps a great deal to understand what a filter does.
4297 Document more things not specified clearly in RFC3028. I had all this
4298 sorted out, when out of a sudden new issues came to my mind. Oops."
4300 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4303 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4304 canonical form (as documented). However, after a host name lookup from
4305 the IP address, check_host() was doing a simple string comparison with
4306 addresses acquired from the DNS when checking that the found name did
4307 have the original IP as one of its addresses. Since any found IPv6
4308 addresses are likely to be in abbreviated form, the comparison could
4309 fail. Luckily, there already exists a function for doing the comparison
4310 by converting both addresses to binary, so now that is used instead of
4311 the text comparison.
4313 PH/20 There was another similar case to PH/19, when a complete host name was
4314 given in a host list; looking up its IP address could give an abbreviated
4315 form, whereas the current host's name might or might not be abbreviated.
4316 The same fix has been applied.
4322 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4323 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4326 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4327 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4329 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4331 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4332 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4333 Also, for "Auto-Submitted", treat anything other than "no" as
4334 non-personal, in accordance with RFC 3834. (Previously it treated
4335 anything starting "auto-" as non-personal.)
4337 TF/01 The control=submission/name=... option had a problem with syntax
4338 errors if the name included a slash character. The /name= option
4339 now slurps the rest of the string, so it can include any characters
4340 but it must come last in the list of options (after /sender_retain
4343 PH/05 Some modifications to the interface to the fake nameserver for the new
4351 TK/01 Added the "success_on_redirect" address verification option. See
4352 NewStuff for rationale and an example.
4354 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4356 PH/02 Patch to exigrep to allow it to work on syslog lines.
4358 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4359 fread() to skip over the body file's header line, because in Cygwin the
4360 header line is locked and is inaccessible.
4362 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4363 co-exist for some time) to make it clear that it is the Exim ID that is
4364 referenced, not the Message-ID: header line.
4366 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4367 string_format() function, because snprintf() does not exist on all
4370 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4371 ${stat: expansion item.
4373 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4374 protocol synchronization error", to keep the pedants happy.
4376 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4377 well as for IRIX systems, when gcc is being used. See the host.c source
4380 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4382 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4385 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4386 transport and to the smtp transport in LMTP mode.
4388 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4390 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4391 run a filter in a subprocess. This could lead to confusion in subsequent
4392 lookups in the parent process. There should also be a search_tidyup() at
4393 the end of the subprocess.
4395 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4396 only if the host matched helo_try_verify_hosts, which caused the
4397 verification to occur when the EHLO/HELO command was issued. The ACL just
4398 tested the remembered result. Now, if a previous verification attempt has
4399 not happened, "verify = helo" does it there and then.
4401 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4403 TK/03 Fix log output including CR from clamd.
4405 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4406 exist provoked a memory error which could cause a segfault.
4408 PH/15 Installed PCRE 6.2
4410 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4412 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4413 of the problem. Specifically, suggested +O2 rather than +O1 for the
4416 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4418 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4419 record, the port was not correctly logged when the outgoing_port log
4420 selector was set (it logged the transort's default port).
4422 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4423 fallback_hosts, and "hosts" in the smtp transport.
4425 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4426 host errors such as "Connection refused".
4428 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4429 authentication with radiusclient 0.4.9:
4431 - Error returned from rc_read_config was caught wrongly
4432 - Username/password not passed on to radius server due to wrong length.
4434 The presumption is that some radiusclient API changes for 4.51/PH/17
4435 were not taken care of correctly. The code is still untested by me (my
4436 Linux distribution still has 0.3.2 of radiusclient), but it was
4437 contributed by a Radius user.
4439 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4440 expanding the "port" option of the smtp transport.
4442 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4443 while reading a MIME header. Thanks to Tom Hughes for a patch.
4445 PH/24 Include config.h inside local_scan.h so that configuration settings are
4448 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4449 that in an ACL for RCPT (for example), you can examine exactly what was
4452 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4453 commands, but it was not correctly comparing the address with the actual
4454 client host address. Thus, it would show the EHLO address in Received:
4455 header lines when this was not necessary.
4457 PH/27 Added the % operator to ${eval:}.
4459 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4460 it should be ignoring failures (because with -C, for example, it has lost
4461 privilege). It wasn't ignoring creation failures other than "already
4464 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4467 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4468 because an input line was too long, either on its own, or by virtue of
4469 too many continuations, the temporary file was not being removed, and the
4470 return code was incorrect.
4472 PH/31 Missing "BOOL" in function definition in filtertest.c.
4474 PH/32 Applied Sieve patches from the maintainer.
4476 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4478 PH/33 Added "verify = not_blind".
4480 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4481 Local/Makefile (with some defaults set). These are used in built scripts
4482 such as exicyclog, but they have never been used in the exim_install
4483 script (though there are many overriding facilities there). I have
4484 arranged that the exim_install script now takes note of these two
4487 PH/35 Installed configuration files for Dragonfly.
4489 PH/36 When a locally submitted message by a trusted user did not contain a
4490 From: header, and the sender address was obtained from -f or from an SMTP
4491 MAIL command, and the trusted user did not use -F to supply a sender
4492 name, $originator_name was incorrectly used when constructing a From:
4493 header. Furthermore, $originator_name was used for submission mode
4494 messages from external hosts without From: headers in a similar way,
4495 which is clearly wrong.
4497 PH/37 Added control=suppress_local_fixups.
4499 PH/38 When log_selector = +received_sender was set, and the addition of the
4500 sender made the log line's construction buffer exactly full, or one byte
4501 less than full, an overflow happened when the terminating "\n" was
4504 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4505 when the result of a list match is failure because a DNS lookup failed.
4507 PH/40 RM_COMMAND is now used in the building process.
4509 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4510 the "build-* directories that it finds.
4512 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4513 address in a domain literal was a prefix of an interface address.
4515 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4516 when verifying a sender address, unless rewrite_headers is false.
4518 PH/44 Wrote a long comment about why errors_to addresses are verified as
4519 recipients, not senders.
4521 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4522 the ratelimit ACL was added.
4524 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4526 PH/46 Added extra information about PostgreSQL errors to the error string.
4528 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4529 avoiding the need to install special zones in a real server. This is
4530 backwards compatible; if it can't find the fake resolver, it drops back.
4531 Thus, both old and new test suites can be run.
4533 TF/02 Added util/ratelimit.pl
4535 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4536 clock is set back in time.
4538 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4539 Candler <B.Candler@pobox.com>.
4541 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4542 OK for addresses that are the result of redirections.
4544 PH/48 A number of further additions for the benefit of the new test suite,
4545 including a fake gethostbyname() that interfaces to the fake DNS resolver
4548 TF/06 The fix for widen_domains has also been applied to qualify_single and
4549 search_parents which are the other dnslookup options that can cause
4552 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4555 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4557 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4558 service" if it encountered an MX record with an empty target hostname.
4559 The message is now "an MX or SRV record indicated no SMTP service".
4561 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4562 if the DNS of the sending site is misconfigured. This is quite a
4563 common situation. This change restores the behaviour of treating a
4564 helo verification defer as a failure.
4566 PH/51 If self=fail was set on a router, the bounce message did not include the
4567 actual error message.
4573 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4575 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4576 command itself ended in error, the underlying message about the transport
4577 filter timeout was being overwritten with the pipe command error. Now the
4578 underlying error message should be appended to the second error message.
4580 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4582 PH/02 Reduce the amount of output that "make" produces by default. Full output
4583 can still be requested.
4585 PH/03 The warning log line about a condition test deferring for a "warn" verb
4586 was being output only once per connection, rather than after each
4587 occurrence (because it was using the same function as for successful
4588 "warn" verbs). This seems wrong, so I have changed it.
4590 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4591 it should not have, which might have caused a crash in the right
4592 circumstances, but probably never did.
4594 PH/04 Installed a modified version of Tony Finch's patch to make submission
4595 mode fix the return path as well as the Sender: header line, and to
4596 add a /name= option so that you can make the user's friendly name appear
4599 TF/03 Added the control = fakedefer ACL modifier.
4601 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4602 Mark Lowes for thorough testing.
4604 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4606 TK/03 Merged latest SRS patch from Miles Wilton.
4608 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4609 with the definition in sysexits.h (which is #included earlier).
4610 Fortunately, Exim does not actually use EX_OK. The code used to try to
4611 preserve the sysexits.h value, by assuming that macro definitions were
4612 scanned for macro replacements. I have been disabused of this notion,
4613 so now the code just undefines EX_OK before #including unistd.h.
4615 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4616 in the smtp transport. When a block could not be written in a single
4617 write() function, the timeout was being re-applied to each part-write.
4618 This seems wrong - if the receiver was accepting one byte at a time it
4619 would take for ever. The timeout is now adjusted when this happens. It
4620 doesn't have to be particularly precise.
4622 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4623 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4625 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4626 without a domain if the check to <postmaster@domain> fails.
4628 SC/01 Eximstats: added -xls and the ability to specify output files
4629 (patch written by Frank Heydlauf).
4631 SC/02 Eximstats: use FileHandles for outputting results.
4633 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4635 SC/04 Eximstats: fixed display of large numbers with -nvr option
4637 SC/05 Eximstats: fixed merging of reports with empty tables.
4639 SC/06 Eximstats: added the -include_original_destination flag
4641 SC/07 Eximstats: removed tabs and trailing whitespace.
4643 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4645 TK/06 MBOX spool code: Add real "From " MBOX separator line
4646 so the .eml file is really in mbox format (even though
4647 most programs do not really care). Patch from Alex Miller.
4649 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4650 The latter is generated from $received_to and is only set if the
4651 message has one envelope recipient. SA can use these headers,
4652 obviously out-of-the-box. Patch from Alex Miller.
4654 PH/08 The ${def test on a variable was returning false if the variable's
4655 value was "0", contrary to what the specification has always said!
4656 The result should be true unless the variable is empty.
4658 PH/09 The syntax error of a character other than { following "${if
4659 def:variable_name" (after optional whitespace) was not being diagnosed.
4660 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4661 accidental colon was present, for example, could give incorrect results.
4663 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4664 result is used (not including appendfile, where other changes are about
4667 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4668 This involved changing a lot of size variables from int to off_t. It
4669 should work with maildirs and everything.
4671 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4672 spamd dying while we are connected to it.
4674 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4677 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4678 function for BDB 4.3.
4680 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4682 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4683 the sources for PCRE have been re-arranged and more files are now
4686 PH/15 The code I had for printing potentially long long variables in PH/11
4687 above was not the best (it lost precision). The length of off_t variables
4688 is now inspected at build time, and an appropriate printing format (%ld
4689 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4690 to be "long long int" or "long int". This is needed for the internal
4691 formatting function string_vformat().
4693 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4694 the configuration file to be ":syslog", then the script "guesses" where
4695 the logs files are, rather than using the compiled in default. In our
4696 case the guess is not the same as the compiled default, so the script
4697 suddenly stopped working when I started to use syslog. The patch checks
4698 to see if log_file_path is "". If so, it attempts to read it from exim
4699 with no configuration file to get the compiled in version, before it
4700 falls back to the previous guessing code."
4702 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4703 implementing BATV in an Exim configuration. See NewStuff for the gory
4706 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4707 Makefile that are specific to HP-UX.
4709 PH/18 If the "use_postmaster" option was set for a recipient callout together
4710 with the "random" option, the postmaster address was used as the MAIL
4711 FROM address for the random test, but not for the subsequent recipient
4712 test. It is now used for both.
4714 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4715 patch removes a few documentation additions to RFC 3028, because the
4716 latest draft now contains them. It adds the new en;ascii-case comparator
4717 and a new error check for 8bit text in MIME parts. Comparator and
4718 require names are now matched exactly. I enabled the subaddress
4719 extension, but it is not well tested yet (read: it works for me)."
4721 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4722 rework some of the code of TK/09 above to avoid the hardwired use of
4723 "%lld" and "long long". Replaced the call to snprintf() with a call to
4726 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4727 records point to non-existent hosts", "retry timeout exceeded", and
4728 "retry time not reached for any host after a long failure period".
4730 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4731 experimental DomainKeys support:
4733 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4734 (2) On an error such as an illegally used "control", the wrong name for
4735 the control was given.
4737 These problems did NOT occur unless DomainKeys support was compiled.
4739 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4741 PH/24 Added ${if match_ip condition.
4743 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4744 databases so that it will be absolutely obvious if a crash occurs in the
4745 DB library. This is a regular occurrence (often caused by mis-matched
4748 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4749 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4750 picked up on a user's system that detects such things. There doesn't seem
4751 to be a gcc warning option for this - only an attribute that has to be
4752 put on the function's prototype. It seems that in Fedora Core 4 they have
4753 set this on a number of new functions. No doubt there will be more in due
4756 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4757 specify a transport. However, if an address that was verified by such a
4758 router was the subject of a callout, Exim crashed because it tried to
4759 read the rcpt_include_affixes from the non-existent transport. Now it
4760 just assumes that the setting of that option is false. This bug was
4761 introduced by 4.51/PH/31.
4763 PH/28 Changed -d+all to exclude +memory, because that information is very
4764 rarely of interest, but it makes the output a lot bigger. People tend to
4765 do -d+all out of habit.
4767 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4768 code in os-type was giving problems when libc.so lives in lib64, like on
4771 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4772 aren't the modern standard, and it seems that some systems' include files
4773 don't always have them. Exim was already checking for some of the newer
4774 ones like T_AAAA, and defining it itself. I've added checks for all the
4775 record types that Exim uses.
4777 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4778 not automatically generating a new one, as it is supposed to. This
4779 prevented TLS from working. If the file did exist, but contained invalid
4780 data, a new version was generated, as expected. It was only the case of a
4781 non-existent file that was broken.
4783 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4784 with a change in libdomainkeys > 0.64.
4786 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4787 from DNS. If the selector record carries the flag, it now has
4788 precedence over the domain-wide flag.
4790 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4792 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4793 the use of a port name that isn't defined in /etc/services) occurred, the
4794 message was deferred as in a normal delivery, and thus remained on the
4795 spool, instead of being failed because of the mua_wrapper setting. This
4796 is now fixed, and I tidied up some of the mua_wrapper messages at the
4799 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4800 the messages in a hash of arrays rather than using individual hashes.
4801 This is a bit cleaner and results in dramatic memory savings, albeit
4802 at a slight CPU cost.
4804 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4805 as requested by Marc Sherman.
4807 SC/10 Eximstats: added histograms for user specified patterns as requested
4810 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4812 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4813 fopen() in the content-scanning modules that did not already have it.
4819 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4820 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4822 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4824 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4826 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4827 to test Sieve filters that use "vacation".
4829 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4830 that changes the way the GnuTLS parameters are stored in the cache file.
4831 The new format can be generated externally. For backward compatibility,
4832 if the data in the cache doesn't make sense, Exim assumes it has read an
4833 old-format file, and it generates new data and writes a new file. This
4834 means that you can't go back to an older release without removing the
4837 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4838 work if there are any delivery delays because "one_time" forces the
4839 parent to be marked "delivered", so its unseen clone is never tried
4840 again. For this reason, Exim now forbids the simultaneous setting of
4843 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4844 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4845 entry if you want to know the details. The fix, however, neglected to
4846 consider the case when local delivery batching is involved. The test for
4847 "previously delivered" was not happening when checking to see if an
4848 address could be batched with a previous (undelivered) one; under
4849 certain circumstances this could lead to multiple deliveries to the same
4852 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4853 in its include files, and this causes problems building Exim.
4855 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4856 header_syntax) but Exim was just ignoring anything given after a slash.
4857 In particular, this caused confusion with an attempt to use "verify =
4858 reverse_host_lookup/defer_ok". An error is now given when options are
4859 supplied for verify items that do not have them. (Maybe reverse_host_
4860 lookup should have a defer_ok option, but that's a different point.)
4862 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4863 defined by RFC 821) to 2048, because there were problems with some AUTH
4864 commands, and RFC 1869 says the size should be increased for extended
4865 SMTP commands that take arguments.
4867 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4870 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4871 "unknown" error; now it says that the functionality isn't in the binary.
4873 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4874 an address' error message when a string expansion fails (syntax or
4875 whatever). Otherwise the password may appear in the log. Following change
4876 PH/42 below, there is no longer a chance of it appearing in a bounce
4879 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4881 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4882 of its addresses was ever tried. (Bugzilla bug #2.)
4884 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4885 the result incorrectly in the debug output. (It correctly added a newline
4886 to what was transported.)
4888 TF/01 Added $received_time.
4890 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4891 commented out examples of how to interface to a virus scanner and to
4892 SpamAssassin. Also added commented examples of av_scanner and
4893 spamd_address settings.
4895 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4896 and controls are allowed in which ACLs. There were a couple of minor
4897 errors. Some of the entries in the conditions table (which is a table of
4898 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4899 negation of where the condition IS allowed.
4901 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4903 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4904 header file does not have a version number, so I've had to invent a new
4905 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4906 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4907 radiusclient), but it was contributed by a Radius user.
4909 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4910 files or directories, for OpenSSL.
4912 PH/19 When an Exim process that is running as root has to create an Exim log
4913 file, it does so in a subprocess that runs as exim:exim so as to get the
4914 ownership right at creation (otherwise, other Exim processes might see
4915 the file with the wrong ownership). There was no test for failure of this
4916 fork() call, which would lead to the process getting stuck as it waited
4917 for a non-existent subprocess. Forks do occasionally fail when resources
4918 run out. I reviewed all the other calls to fork(); they all seem to check
4921 PH/20 When checking for unexpected SMTP input at connect time (before writing
4922 the banner), Exim was not dealing correctly with a non-positive return
4923 from the read() function. If the client had disconnected by this time,
4924 the result was a log entry for a synchronization error with an empty
4925 string after "input=" when read() returned zero. If read() returned -1
4926 (an event I could not check), uninitialized data bytes were printed.
4927 There were reports of junk text (parts of files, etc) appearing after
4930 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4932 PH/22 Added support for macro redefinition, and (re)definition in between
4933 driver and ACL definitions.
4935 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4936 forgetting to use the resulting value; it was using the unexpanded value.
4938 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4939 hadn't been configured. The fix is from Juergen Kreileder, who
4940 understands it better than I do:
4942 "Here's what I see happening with three configured cyrus_sasl
4943 authenticators configured (plain, login, cram-md5):
4945 On startup auth_cyrus_sasl_init() gets called for each of these.
4946 This means three calls to sasl_listmech() without a specified mech_list.
4947 => SASL tests which mechs of all available mechs actually work
4948 => three warnings about OTP not working
4949 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4951 With the patch, sasl_listmech() also gets called three times. But now
4952 SASL's mech_list option is set to the server_mech specified in the the
4953 authenticator. Or in other words, the answer from sasl_listmech()
4954 gets limited to just the mech you're testing for (which is different
4956 => the return list contains just 'plain' or 'login', 'cram-md5' or
4957 nothing depending on the value of ob->server_mech.
4959 I've just tested the patch: Authentication still works fine,
4960 unavailable mechs specified in the exim configuration are still
4961 caught, and the auth.log warnings about OTP are gone."
4963 PH/25 When debugging is enabled, the contents of the command line are added
4964 to the debugging output, even when log_selector=+arguments is not
4967 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4968 answer is "GNU", and only if the return is "GNU/something" is the answer
4971 PH/27 $acl_verify_message is now set immediately after the failure of a
4972 verification in an ACL, and so is available in subsequent modifiers. In
4973 particular, the message can be preserved by coding like this:
4975 warn !verify = sender
4976 set acl_m0 = $acl_verify_message
4978 Previously, $acl_verify_message was set only while expanding "message"
4979 and "log_message" when a very denied access.
4981 PH/28 Modified OS/os.c-Linux with
4983 -#ifndef OS_LOAD_AVERAGE
4984 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4986 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4987 nomenclature these days.)
4989 PH/29 Installed patch from the Sieve maintainer that adds the options
4990 sieve_useraddress and sieve_subaddress to the redirect router.
4992 PH/30 In these circumstances:
4993 . Two addresses routed to the same list of hosts;
4994 . First host does not offer TLS;
4995 . First host accepts first address;
4996 . First host gives temporary error to second address;
4997 . Second host offers TLS and a TLS session is established;
4998 . Second host accepts second address.
4999 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5000 and peerdn, if requested) that were in fact used only for the second
5003 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5004 attention to any local part prefix or suffix that was matched by the
5005 router that accepted the address. It now behaves in the same way as it
5006 does for delivery: the affixes are removed from the local part unless
5007 rcpt_include_affixes is set on the transport.
5009 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5010 timeout during the DATA phase of an incoming message.
5012 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5013 applied a patch sanctioned by the Sieve maintainer.
5015 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5016 the uid or gid is negative. A case of a negative gid caused this to be
5017 noticed. The fix allows for either to be negative.
5019 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5020 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5023 PH/36 The change PH/12 above was broken. Fixed it.
5025 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5026 the grounds that routing the same address twice would always produce the
5027 same answer. This might have been true once, but it is certainly no
5028 longer true now. Routing a child address may depend on the previous
5029 routing that produced that child. Some complicated redirection strategies
5030 went wrong when messages had multiple recipients, and made Exim's
5031 behaviour dependent on the order in which the addresses were given.
5033 I have moved the duplicate checking until after the routing is complete.
5034 Exim scans the addresses that are assigned to local and remote
5035 transports, and removes any duplicates. This means that more work will be
5036 done, as duplicates will always all be routed, but duplicates are
5037 presumably rare, so I don't expect this is of any significance.
5039 For deliveries to pipes, files, and autoreplies, the duplicate checking
5040 still happens during the routing process, since they are not going to be
5043 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5044 It corrects a timeout issue with spamd. This is Ian's comment: "The
5045 background is that sometimes spamd either never reads data from a
5046 connection it has accepted, or it never writes response data. The exiscan
5047 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5048 blindly assumes that writes won't block so it may never time out."
5050 PH/39 Allow G after quota size as well as K and M.
5052 PH/40 The value set for $authenticated_id in an authenticator may not contain
5053 binary zeroes or newlines because the value is written to log lines and
5054 to spool files. There was no check on this. Now the value is run through
5055 the string_printing() function so that such characters are converted to
5056 printable escape sequences.
5058 PH/41 $message_linecount is a new variable that contains the total number of
5059 lines in the message. Compare $body_linecount, which is the count for the
5062 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5063 bounce and delay warning messages, except in certain special cases, which
5066 (a) An SMTP error message from a remote host;
5067 (b) A message specified in a :fail: redirection;
5068 (c) A message specified in a "fail" command in a system filter;
5069 (d) A message specified in a FAIL return from the queryprogram router;
5070 (e) A message specified by the cannot_route_message router option.
5072 In these cases only, Exim does include the error details in bounce and
5073 warning messages. There are also a few cases where bland messages such
5074 as "unrouteable address" or "local delivery error" are given.
5076 PH/43 $value is now also set for the "else" part of a ${run expansion.
5078 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5079 being worked on, but at least Exim now implements the latest version to
5082 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5083 process to complete was treated as a delivery failure, a timeout while
5084 writing the message to the pipe was logged, but erroneously treated as a
5085 successful delivery. Such timeouts include transport filter timeouts. For
5086 consistency with the overall process timeout, these timeouts are now
5087 treated as errors, giving rise to delivery failures by default. However,
5088 there is now a new Boolean option for the pipe transport called
5089 timeout_defer, which, if set TRUE, converts the failures into defers for
5090 both kinds of timeout. A transport filter timeout is now identified in
5093 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5094 systems where "make" and "gmake" are different, calling "gmake" at top
5095 level broke things. I've arranged for the value of $(MAKE) to be passed
5096 from the Makefile to this script so that it can call the same version of
5100 A note about Exim versions 4.44 and 4.50
5101 ----------------------------------------
5103 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5104 changes of various kinds. As a consequence, a big documentation update was
5105 needed. This delayed the release for rather longer than seemed good, especially
5106 in the light of a couple of (minor) security issues. Therefore, the changes
5107 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5108 release. So 4.44 and 4.50 are in effect two different branches that both start
5111 I have left the 4.50 change log unchanged; it contains all the changes since
5112 4.43. The change log for 4.44 is below; many of its items are identical to
5113 those for 4.50. This seems to be the most sensible way to preserve the
5114 historical information.
5120 1. Minor wording change to the doc/README.SIEVE file.
5122 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5123 computation of the current number of files was incorrect.
5125 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5126 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5129 4. Give more explanation in the error message when the command for a transport
5130 filter fails to execute.
5132 5. There are several places where Exim runs a non-Exim command in a
5133 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5134 was being done only for the command run by the queryprogram router. It is
5135 now done for all such subprocesses. The other cases are: ${run, transport
5136 filters, and the commands run by the lmtp and pipe transports.
5138 6. Added CONFIGURE_GROUP build-time option.
5140 7. Some older OS have a limit of 256 on the maximum number of file
5141 descriptors. Exim was using setrlimit() to set 1000 as a large value
5142 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5143 systems. I've change it so that if it can't get 1000, it tries for 256.
5145 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5146 was an oversight, and furthermore, ever since the addition of extra
5147 controls (e.g. 4.43/32), the checks on when to allow different forms of
5148 "control" were broken. There should now be diagnostics for all cases when a
5149 control that does not make sense is encountered.
5151 9. Added the /retain_sender option to "control=submission".
5153 10. $recipients is now available in the predata ACL (oversight).
5155 11. Tidy the search cache before the fork to do a delivery from a message
5156 received from the command line. Otherwise the child will trigger a lookup
5157 failure and thereby defer the delivery if it tries to use (for example) a
5158 cached ldap connection that the parent has called unbind on.
5160 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5161 of $address_data from the recipient verification was clobbered by the
5162 sender verification.
5164 13. The value of address_data from a sender verification is now available in
5165 $sender_address_data in subsequent conditions in the ACL statement.
5167 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5169 15. Added a new option "connect=<time>" to callout options, to set a different
5172 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5173 was its contents. (It was OK if the option was not defined at all.)
5175 17. A "Completed" log line is now written for messages that are removed from
5176 the spool by the -Mrm option.
5178 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5179 information about exactly what failed.
5181 19. Added -dd to debug only the daemon process.
5183 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5184 handles timeouts, both on the server side and network timeouts. Renamed the
5185 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5187 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5188 It is now set to "smtps".
5190 22. $host_address is now set to the target address during the checking of
5191 ignore_target_hosts.
5193 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5194 being passed; this would have caused $sender_host_name to have been used if
5195 matching the list had actually called for a host name (not very likely,
5196 since this list is usually IP addresses). A host name is now passed as
5199 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5200 code that specifies a non-restarting handler (typically sigaction() in
5201 modern systems) in an attempt to fix a rare and obscure crash bug.
5203 25. Narrowed the window for a race in the daemon that could cause it to ignore
5204 SIGCHLD signals. This is not a major problem, because they are used only to
5205 wake it up if nothing else does.
5207 26. A malformed maildirsize file could cause Exim to calculate negative values
5208 for the mailbox size or file count. Odd effects could occur as a result.
5209 The maildirsize information is now recalculated if the size or filecount
5212 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5213 support for a long time. Removed HAVE_SYS_VFS_H.
5215 28. Installed the latest version of exipick from John Jetmore.
5217 29. In an address list, if the pattern was not a regular expression, an empty
5218 subject address (from a bounce message) matched only if the pattern was an
5219 empty string. Non-empty patterns were not even tested. This was the wrong
5220 because it is perfectly reasonable to use an empty address as part of a
5221 database query. An empty address is now tested by patterns that are
5222 lookups. However, all the other forms of pattern expect the subject to
5223 contain a local part and a domain, and therefore, for them, an empty
5224 address still always fails if the pattern is not itself empty.
5226 30. Exim went into a mad DNS loop when attempting to do a callout where the
5227 host was specified on an smtp transport, and looking it up yielded more
5228 than one IP address.
5230 31. Re-factored the code for checking spool and log partition space into a
5231 function that finds that data and another that does the check. The former
5232 is then used to implement four new variables: $spool_space, $log_space,
5233 $spool_inodes, and $log_inodes.
5235 32. The RFC2047 encoding function was originally intended for short strings
5236 such as real names; it was not keeping to the 75-character limit for
5237 encoded words that the RFC imposes. It now respects the limit, and
5238 generates multiple encoded words if necessary. To be on the safe side, I
5239 have increased the buffer size for the ${rfc2047: expansion operator from
5242 33. It is now permitted to omit both strings after an "if" condition; if the
5243 condition is true, the result is "true". As before, when the second string
5244 is omitted, a false condition yields an empty string. This makes it less
5245 cumbersome to write custom ACL and router conditions.
5247 34. Failure to deliver a bounce message always caused it to be frozen, even if
5248 there was an errors_to setting on the router. The errors_to setting is now
5251 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5252 canonical form (fully expanded) before being placed in
5253 $sender_host_address.
5255 36. The table in the code that translates DNS record types into text (T_A to
5256 "A" for instance) was missing entries for NS and CNAME. It is just possible
5257 that this could have caused confusion if both these types were looked up
5258 for the same domain, because the text type is used as part of Exim's
5259 per-process caching. But the chance of anyone hitting this buglet seems
5262 37. The dnsdb lookup has been extended in a number of ways.
5264 (1) There is a new type, "zns", which walks up the domain tree until it
5265 finds some nameserver records. It should be used with care.
5267 (2) There is a new type, "mxh", which is like "mx" except that it returns
5268 just the host names, not the priorities.
5270 (3) It is now possible to give a list of domains (or IP addresses) to be
5271 looked up. The behaviour when one of the lookups defers can be
5272 controlled by a keyword.
5274 (4) It is now possible to specify the separator character for use when
5275 multiple records are returned.
5277 38. The dnslists ACL condition has been extended: it is now possible to supply
5278 a list of IP addresses and/or domains to be looked up in a particular DNS
5281 39. Added log_selector=+queue_time_overall.
5283 40. When running the queue in the test harness, wait just a tad after forking a
5284 delivery process, to get repeatability of debugging output.
5286 41. Include certificate and key file names in error message when GnuTLS fails
5287 to set them up, because the GnuTLS error message doesn't include the name
5288 of the failing file when there is a problem reading it.
5290 42. Allow both -bf and -bF in the same test run.
5292 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5294 44. The "Exiscan patch" is now merged into the mainline Exim source.
5296 45. Sometimes the final signoff response after QUIT could fail to get
5297 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5298 < 0 before doing a fflush(). This bug looks as though it goes back to the
5299 introduction of TLS in release 3.20, but "sometimes" must have been rare
5300 because the tests only now provoked it.
5302 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5303 (this can affect the format of dates).
5305 47. exim_tidydb, when checking for the continued existence of a message for
5306 which it has found a message-specific retry record, was not finding
5307 messages that were in split spool directories. Consequently, it was
5308 deleting retry records that should have stayed in existence.
5310 48. Steve fixed some bugs in eximstats.
5312 49. The SPA authentication driver was not abandoning authentication and moving
5313 on to the next authenticator when an expansion was forced to fail,
5314 contradicting the general specification for all authenticators. Instead it
5315 was generating a temporary error. It now behaves as specified.
5317 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5318 (the order specifies the preference for clients). The order is now AES256,
5319 AES128, 3DES, ARCFOUR128.
5321 51. Small patch to Sieve code - explicitly set From: when generating an
5324 52. Exim crashed if a remote delivery caused a very long error message to be
5325 recorded - for instance if somebody sent an entire SpamAssassin report back
5326 as a large number of 550 error lines. This bug was coincidentally fixed by
5327 increasing the size of one of Exim's internal buffers (big_buffer) that
5328 happened as part of the Exiscan merge. However, to be on the safe side, I
5329 have made the code more robust (and fixed the comments that describe what
5332 53. Now that there can be additional text after "Completed" in log lines (if
5333 the queue_time_overall log selector is set), a one-byte patch to exigrep
5334 was needed to allow it to recognize "Completed" as not the last thing in
5337 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5338 patch that reportedly fixes this has been added. I am not expert enough to
5339 create a test for it. This is what the patch creator wrote:
5341 "I found a little strange behaviour of ldap code when working with
5342 Windows 2003 AD Domain, where users was placed in more than one
5343 Organization Units. When I tried to give exim partial DN, the exit code
5344 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5345 But simultaneously result of request was absolutely normal ldap result,
5346 so I produce this patch..."
5348 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5349 REFERENCE, so I have modified the code to exclude the patch when that macro
5352 55. Some experimental protocols are using DNS PTR records for new purposes. The
5353 keys for these records are domain names, not reversed IP addresses. The
5354 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5355 leaves it alone. Component reversal etc. now happens only for IP addresses.
5358 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5360 57. Double the size of the debug message buffer (to 2048) so that more of very
5361 long debug lines gets shown.
5363 58. The exicyclog utility now does better if the number of log files to keep
5364 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5366 59. Two changes related to the smtp_active_hostname option:
5368 (1) $smtp_active_hostname is now available as a variable.
5369 (2) The default for smtp_banner uses $smtp_active_hostname instead
5370 of $primary_hostname.
5372 60. The host_aton() function is supposed to be passed a string that is known
5373 to be a valid IP address. However, in the case of IPv6 addresses, it was
5374 not checking this. This is a hostage to fortune. Exim now panics and dies
5375 if the condition is not met. A case was found where this could be provoked
5376 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5377 components; fortuitously, this particular loophole had already been fixed
5378 by change 4.50/55 above.
5380 If there are any other similar loopholes, the new check in host_aton()
5381 itself should stop them being exploited. The report I received stated that
5382 data on the command line could provoke the exploit when Exim was running as
5383 exim, but did not say which command line option was involved. All I could
5384 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5385 running as the user.
5388 61. There was a buffer overflow vulnerability in the SPA authentication code
5389 (which came originally from the Samba project). I have added a test to the
5390 spa_base64_to_bits() function which I hope fixes it.
5393 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5394 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5396 63. The daemon start-up calls getloadavg() while still root for those OS that
5397 need the first call to be done as root, but it missed one case: when
5398 deliver_queue_load_max is set with deliver_drop_privilege. This is
5399 necessary for the benefit of the queue runner, because there is no re-exec
5400 when deliver_drop_privilege is set.
5402 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5403 This has been fixed.
5405 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5406 was in use, was not putting the data itself into the right store pool;
5407 consequently, it could be overwritten for a subsequent message in the same
5408 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5411 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5413 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5414 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5415 the function were treating the return as a boolean value, which happened to
5416 work because 0=false and not-0=true, but is not correct code.
5418 68. The host_aton() function was not handling scoped IPv6 addresses (those
5419 with, for example, "%eth0" on the end) correctly.
5421 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5422 negated items (that is, ~something) in unsigned ints. Some compilers
5423 apparently mutter when there is no cast.
5425 70. If an address verification called from an ACL failed, and did not produce a
5426 user-specific message (i.e. there was only a "system" message), nothing was
5427 put in $acl_verify_message. In this situation, it now puts the system
5430 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5431 session; change 4.31/43 added the unwanted input to the log line - except
5432 that it did not do this in the start of session case. It now does.
5434 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5435 This is wrong and can cause the other end to generate a synchronization
5436 error if it is another Exim or anything else that does the synchronization
5437 check. A QUIT command is no longer sent after a timeout.
5439 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5440 during host lookups.
5442 74. The defer_ok option of callout verification was not working if it was used
5443 when verifying addresses in header lines, that is, for this case:
5445 verify = header_sender/callout=defer_ok
5447 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5448 those file descriptors could be used for SMTP connections. If anything
5449 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5450 could be sent to the SMTP client, causing chaos. The daemon now opens
5451 stdin, stdout, and stderr to /dev/null when it puts itself into the
5454 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5455 log by default. The user can override this with suitable Perl magic.
5457 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5458 the log message when discard triggers, was not working for the DATA ACL or
5459 for the non-SMTP ACL.
5461 78. Error message wording change in sieve.c.
5463 79. If smtp_accept_max_per_host was set, the number of connections could be
5464 restricted to fewer than expected, because the daemon was trying to set up
5465 a new connection before checking whether the processes handling previous
5466 connections had finished. The check for completed processes is now done
5467 earlier. On busy systems, this bug wouldn't be noticed because something
5468 else would have woken the daemon, and it would have reaped the completed
5471 80. If a message was submitted locally by a user whose login name contained one
5472 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5473 It caused a spool format error. I have fixed the spool reading code. A
5474 related problem was that the "from" clause in the Received: line became
5475 illegal because of the space(s). It is now covered by ${quote_local_part.
5477 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5480 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5482 83. Patch from Sieve maintainer to fix unterminated string problem in
5483 "vacation" handling.
5485 84. Some minor changes to the Linux configuration files to help with other
5486 OS variants using glibc.
5488 85. One more patch for Sieve to update vacation handling to latest spec.
5491 ----------------------------------------------------
5492 See the note above about the 4.44 and 4.50 releases.
5493 ----------------------------------------------------
5499 1. Change 4.43/35 introduced a bug that caused file counts to be
5500 incorrectly computed when quota_filecount was set in an appendfile
5503 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5504 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5507 3. Give more explanation in the error message when the command for a transport
5508 filter fails to execute.
5510 4. There are several places where Exim runs a non-Exim command in a
5511 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5512 was being done only for the command run by the queryprogram router. It is
5513 now done for all such subprocesses. The other cases are: ${run, transport
5514 filters, and the commands run by the lmtp and pipe transports.
5516 5. Some older OS have a limit of 256 on the maximum number of file
5517 descriptors. Exim was using setrlimit() to set 1000 as a large value
5518 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5519 systems. I've change it so that if it can't get 1000, it tries for 256.
5521 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5522 was an oversight, and furthermore, ever since the addition of extra
5523 controls (e.g. 4.43/32), the checks on when to allow different forms of
5524 "control" were broken. There should now be diagnostics for all cases when a
5525 control that does not make sense is encountered.
5527 7. $recipients is now available in the predata ACL (oversight).
5529 8. Tidy the search cache before the fork to do a delivery from a message
5530 received from the command line. Otherwise the child will trigger a lookup
5531 failure and thereby defer the delivery if it tries to use (for example) a
5532 cached ldap connection that the parent has called unbind on.
5534 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5535 of $address_data from the recipient verification was clobbered by the
5536 sender verification.
5538 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5539 was its contents. (It was OK if the option was not defined at all.)
5541 11. A "Completed" log line is now written for messages that are removed from
5542 the spool by the -Mrm option.
5544 12. $host_address is now set to the target address during the checking of
5545 ignore_target_hosts.
5547 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5548 being passed; this would have caused $sender_host_name to have been used if
5549 matching the list had actually called for a host name (not very likely,
5550 since this list is usually IP addresses). A host name is now passed as
5553 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5554 code that specifies a non-restarting handler (typically sigaction() in
5555 modern systems) in an attempt to fix a rare and obscure crash bug.
5557 15. Narrowed the window for a race in the daemon that could cause it to ignore
5558 SIGCHLD signals. This is not a major problem, because they are used only to
5559 wake it up if nothing else does.
5561 16. A malformed maildirsize file could cause Exim to calculate negative values
5562 for the mailbox size or file count. Odd effects could occur as a result.
5563 The maildirsize information is now recalculated if the size or filecount
5566 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5567 support for a long time. Removed HAVE_SYS_VFS_H.
5569 18. Updated exipick to current release from John Jetmore.
5571 19. Allow an empty sender to be matched against a lookup in an address list.
5572 Previously the only cases considered were a regular expression, or an
5575 20. Exim went into a mad DNS lookup loop when doing a callout where the
5576 host was specified on the transport, if the DNS lookup yielded more than
5579 21. The RFC2047 encoding function was originally intended for short strings
5580 such as real names; it was not keeping to the 75-character limit for
5581 encoded words that the RFC imposes. It now respects the limit, and
5582 generates multiple encoded words if necessary. To be on the safe side, I
5583 have increased the buffer size for the ${rfc2047: expansion operator from
5586 22. Failure to deliver a bounce message always caused it to be frozen, even if
5587 there was an errors_to setting on the router. The errors_to setting is now
5590 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5591 canonical form (fully expanded) before being placed in
5592 $sender_host_address.
5594 24. Updated eximstats to version 1.33
5596 25. Include certificate and key file names in error message when GnuTLS fails
5597 to set them up, because the GnuTLS error message doesn't include the name
5598 of the failing file when there is a problem reading it.
5600 26. Expand error message when OpenSSL has problems setting up cert/key files.
5603 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5604 (this can affect the format of dates).
5606 28. exim_tidydb, when checking for the continued existence of a message for
5607 which it has found a message-specific retry record, was not finding
5608 messages that were in split spool directories. Consequently, it was
5609 deleting retry records that should have stayed in existence.
5611 29. eximstats updated to version 1.35
5612 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5613 1.35 - bugfix such that pie charts by volume are generated correctly
5615 30. The SPA authentication driver was not abandoning authentication and moving
5616 on to the next authenticator when an expansion was forced to fail,
5617 contradicting the general specification for all authenticators. Instead it
5618 was generating a temporary error. It now behaves as specified.
5620 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5621 (the order specifies the preference for clients). The order is now AES256,
5622 AES128, 3DES, ARCFOUR128.
5624 31. Small patch to Sieve code - explicitly set From: when generating an
5627 32. Exim crashed if a remote delivery caused a very long error message to be
5628 recorded - for instance if somebody sent an entire SpamAssassin report back
5629 as a large number of 550 error lines. This bug was coincidentally fixed by
5630 increasing the size of one of Exim's internal buffers (big_buffer) that
5631 happened as part of the Exiscan merge. However, to be on the safe side, I
5632 have made the code more robust (and fixed the comments that describe what
5635 33. Some experimental protocols are using DNS PTR records for new purposes. The
5636 keys for these records are domain names, not reversed IP addresses. The
5637 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5638 leaves it alone. Component reversal etc. now happens only for IP addresses.
5641 34. The host_aton() function is supposed to be passed a string that is known
5642 to be a valid IP address. However, in the case of IPv6 addresses, it was
5643 not checking this. This is a hostage to fortune. Exim now panics and dies
5644 if the condition is not met. A case was found where this could be provoked
5645 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5646 components; fortuitously, this particular loophole had already been fixed
5647 by change 4.50/55 or 4.44/33 above.
5649 If there are any other similar loopholes, the new check in host_aton()
5650 itself should stop them being exploited. The report I received stated that
5651 data on the command line could provoke the exploit when Exim was running as
5652 exim, but did not say which command line option was involved. All I could
5653 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5654 running as the user.
5657 35. There was a buffer overflow vulnerability in the SPA authentication code
5658 (which came originally from the Samba project). I have added a test to the
5659 spa_base64_to_bits() function which I hope fixes it.
5662 36. The daemon start-up calls getloadavg() while still root for those OS that
5663 need the first call to be done as root, but it missed one case: when
5664 deliver_queue_load_max is set with deliver_drop_privilege. This is
5665 necessary for the benefit of the queue runner, because there is no re-exec
5666 when deliver_drop_privilege is set.
5668 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5669 was in use, was not putting the data itself into the right store pool;
5670 consequently, it could be overwritten for a subsequent message in the same
5671 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5674 38. Sometimes the final signoff response after QUIT could fail to get
5675 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5676 < 0 before doing a fflush(). This bug looks as though it goes back to the
5677 introduction of TLS in release 3.20, but "sometimes" must have been rare
5678 because the tests only now provoked it.
5684 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5685 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5686 Now it returns an integer. A number of calls were still expecting a T/F
5687 return. Fortuitously, in all cases, the tests worked in OK situations,
5688 which is the norm. However, things would have gone wrong on any write
5689 failures on the smtp file descriptor. This function is used when sending
5690 messages over SMTP and also when doing verify callouts.
5692 2. When Exim is called to do synchronous delivery of a locally submitted
5693 message (the -odf or -odi options), it no longer closes stderr before doing
5696 3. Implemented the mua_wrapper option.
5698 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5700 5. Implemented the functions header_remove(), header_testname(),
5701 header_add_at_position(), and receive_remove_recipient(), and exported them
5704 6. If an ACL "warn" statement specified the addition of headers, Exim already
5705 inserted X-ACL-Warn: at the start if there was no header name. However, it
5706 was not making this test for the second and subsequent header lines if
5707 there were newlines in the string. This meant that an invalid header could
5708 be inserted if Exim was badly configured.
5710 7. Allow an ACL "warn" statement to add header lines at the start or after all
5711 the Received: headers, as well as at the end.
5713 8. Added the rcpt_4xx retry error code.
5715 9. Added postmaster_mailfrom=xxx to callout verification option.
5717 10. Added mailfrom=xxxx to the callout verification option, for verify=
5720 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5721 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5723 12. Inserted some casts to stop certain compilers warning when using pointer
5724 differences as field lengths or precisions in printf-type calls (mostly
5725 affecting debugging statements).
5727 13. Added optional readline() support for -be (dynamically loaded).
5729 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5730 same clock tick as a message's arrival, so that its received time was the
5731 same as the "first fail" time on the retry record, and that message
5732 remained on the queue past the ultimate address timeout, every queue runner
5733 would try a delivery (because it was past the ultimate address timeout) but
5734 after another failure, the ultimate address timeout, which should have then
5735 bounced the address, did not kick in. This was a "< instead of <=" error;
5736 in most cases the first failure would have been in the next clock tick
5737 after the received time, and all would be well.
5739 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5740 being recognized when the domain list was tested by the match_domain
5741 condition in an expansion string.
5743 16. Added the ${str2b64: operator.
5745 17. Exim was always calling setrlimit() to set a large limit for the number of
5746 processes, without checking whether the existing limit was already
5747 adequate. (It did check for the limit on file descriptors.) Furthermore,
5748 errors from getrlimit() and setrlimit() were being ignored. Now they are
5749 logged to the main and panic logs, but Exim does carry on, to try to do its
5750 job under whatever limits there are.
5752 18. Imported PCRE 5.0.
5754 19. Trivial typo in log message " temporarily refused connection" (the leading
5757 20. If the log selector return_path_on_delivery was set and an address was
5758 redirected to /dev/null, the delivery process crashed because it assumed
5759 that a return path would always be set for a "successful" delivery. In this
5760 case, the whole delivery is bypassed as an optimization, and therefore no
5763 21. Internal re-arrangement: the function for sending a challenge and reading
5764 a response while authentication was assuming a zero-terminated challenge
5765 string. It's now changed to take a pointer and a length, to allow for
5766 binary data in such strings.
5768 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5770 23. Exim was not respecting finduser_retries when seeking the login of the
5771 uid under which it was called; it was always trying 10 times. (The default
5772 setting of finduser_retries is zero.) Also, it was sleeping after the final
5773 failure, which is pointless.
5775 24. Implemented tls_on_connect_ports.
5777 25. Implemented acl_smtp_predata.
5779 26. If the domain in control=submission is set empty, Exim assumes that the
5780 authenticated id is a complete email address when it generates From: or
5781 Sender: header lines.
5783 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5784 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5785 chown and chgrp in /bin and hostname in /usr/bin.
5787 28. Exim was keeping the "process log" file open after each use, just as it
5788 does for the main log. This opens the possibility of it remaining open for
5789 long periods when the USR1 signal hits a daemon. Occasional processlog
5790 errors were reported, that could have been caused by this. Anyway, it seems
5791 much more sensible not to leave this file open at all, so that is what now
5794 29. The long-running daemon process does not normally write to the log once it
5795 has entered its main loop, and it closes the log before doing so. This is
5796 so that log files can straightforwardly be renamed and moved. However,
5797 there are a couple of unusual error situations where the daemon does write
5798 log entries, and I had neglected to close the log afterwards.
5800 30. The text of an SMTP error response that was received during a remote
5801 delivery was being truncated at 512 bytes. This is too short for some of
5802 the long messages that one sometimes sees. I've increased the limit to
5805 31. It is now possible to make retry rules that apply only when a message has a
5806 specific sender, in particular, an empty sender.
5808 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5809 it possible to be selective about when SMTP synchronization is enforced.
5811 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5813 32. Implemented hosts_connection_nolog.
5815 33. Added an ACL for QUIT.
5817 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5820 35. Added mailbox_size and mailbox_filecount to appendfile.
5822 36. Added control = no_multiline_responses to ACLs.
5824 37. There was a bug in the logic of the code that waits for the clock to tick
5825 in the case where the clock went backwards by a substantial amount such
5826 that the microsecond fraction of "now" was more than the microsecond
5827 fraction of "then" (but the whole seconds number was less).
5829 38. Added support for the libradius Radius client library this is found on
5830 FreeBSD (previously only the radiusclient library was supported).
5836 1. When certain lookups returned multiple values in the form name=value, the
5837 quoting of the values was not always being done properly. Specifically:
5838 (a) If the value started with a double quote, but contained no whitespace,
5840 (b) If the value contained whitespace other than a space character (i.e.
5841 tabs or newlines or carriage returns) it was not quoted.
5842 This fix has been applied to the mysql and pgsql lookups by writing a
5843 separate quoting function and calling it from the lookup code. The fix
5844 should probably also be applied to nisplus, ibase and oracle lookups, but
5845 since I cannot test any of those, I have not disturbed their existing code.
5847 2. A hit in the callout cache for a specific address caused a log line with no
5848 reason for rejecting RCPT. Now it says "Previous (cached) callout
5849 verification failure".
5851 3. There was an off-by-one bug in the queryprogram router. An over-long
5852 return line was truncated at 256 instead of 255 characters, thereby
5853 overflowing its buffer with the terminating zero. As well as fixing this, I
5854 have increased the buffer size to 1024 (and made a note to document this).
5856 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5857 when Exim is waiting for an SMTP response from a remote server, Exim
5858 restarts its select() call on the socket, thereby resetting its timeout.
5859 This is not a problem when such interrupts are rare. Somebody set up a cron
5860 job to run exiwhat every 2 minutes, which is less than the normal select()
5861 timeout (5 or 10 minutes). This meant that the select() timeout never
5862 kicked in because it was always reset. I have fixed this by comparing the
5863 time when an interrupt arrives with the time at the start of the first call
5864 to select(). If more time than the timeout has elapsed, the interrupt is
5865 treated as a timeout.
5867 5. Some internal re-factoring in preparation for the addition of Sieve
5868 extensions (by MH). In particular, the "personal" test is moved to a
5869 separate function, and given an option for scanning Cc: and Bcc: (which is
5870 not set for Exim filters).
5872 6. When Exim created an email address using the login of the caller as the
5873 local part (e.g. when creating a From: or Sender: header line), it was not
5874 quoting the local part when it contained special characters such as @.
5876 7. Installed new OpenBSD configuration files.
5878 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5879 try to make them clearer.
5881 9. Callout options, other than the timeout value, were being ignored when
5882 verifying sender addresses in header lines. For example, when using
5884 verify = header_sender/callout=no_cache
5886 the cache was (incorrectly) being used.
5888 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5889 only the Cygwin environment.
5891 11. When return_path_on_delivery was set as a log selector, if different remote
5892 addresses in the same message used different return paths and parallel
5893 remote delivery occurred, the wrong values would sometimes be logged.
5894 (Whenever a remote delivery process finished, the return path value from
5895 the most recently started remote delivery process was logged.)
5897 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5898 lines when AUTH and/or TLS are in use. This is the "received protocol"
5899 field. Exim used to use "asmtp" for authenticated SMTP, without any
5900 indication (in the protocol name) for TLS use. Now it follows the RFC and
5901 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5902 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5903 names appear in log lines as well as in Received: header lines.
5905 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5906 extensions, and comparison tests, and to fix some bugs.
5908 14. Changes to the "personal" filter test:
5910 (1) The test was buggy in that it was just doing the equivalent of
5911 "contains" tests on header lines. For example, if a user's address was
5912 anne@some.where, the "personal" test would incorrectly be true for
5914 To: susanne@some.where
5916 This test is now done by extracting each address from the header in turn,
5917 and checking the entire address. Other tests that are part of "personal"
5918 are now done using regular expressions (for example, to check local parts
5919 of addresses in From: header lines).
5921 (2) The list of non-personal local parts in From: addresses has been
5922 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5923 taken from the Sieve specification recommendations.
5925 (3) If the message contains any header line starting with "List-" it is
5926 treated as non-personal.
5928 (4) The test for "circular" in the Subject: header line has been removed
5929 because it now seems ill-conceived.
5931 15. Minor typos in src/EDITME comments corrected.
5933 16. Installed latest exipick from John Jetmore.
5935 17. If headers_add on a router specified a text string that was too long for
5936 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5937 of string_sprintf() is now avoided.
5939 18. $message_body_size was not set (it was always zero) when running the DATA
5940 ACL and the local_scan() function.
5942 19. For the "mail" command in an Exim filter, no default was being set for
5943 the once_repeat time, causing a random time value to be used if "once" was
5944 specified. (If the value happened to be <= 0, no repeat happened.) The
5945 default is now 0s, meaning "never repeat". The "vacation" command was OK
5946 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5947 (I found it when inspecting the code).
5949 20. There is now an overall timeout for performing a callout verification. It
5950 defaults to 4 times the callout timeout, which applies to individual SMTP
5951 commands during the callout. The overall timeout applies when there is more
5952 than one host that can be tried. The timeout is checked before trying the
5953 next host. This prevents very long delays if there are a large number of
5954 hosts and all are timing out (e.g. when the network connections are timing
5955 out). The value of the overall timeout can be changed by specifying an
5956 additional sub-option for "callout", called "maxwait". For example:
5958 verify = sender/callout=5s,maxwait=20s
5960 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5961 to the end before writing, but this should make it even safer).
5963 22. Exim was forgetting that it had advertised PIPELINING for the second and
5964 subsequent messages on an SMTP connection. It was also not resetting its
5965 memory on STARTTLS and an internal HELO.
5967 23. When Exim logs an SMTP synchronization error within a session, it now
5968 records whether PIPELINING has been advertised or not.
5970 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5971 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5972 rather than long int.
5974 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5976 26. Added the never_mail option to autoreply.
5982 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5983 crash if the getsockname() call failed; this can happen if a connection is
5984 closed very soon after it is established. The problem was simply in the
5985 order in which certain operations were done, causing Exim to try to write
5986 to the SMTP stream before it had set up the file descriptor. The bug has
5987 been fixed by making things happen in the correct order.
5993 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5994 before the connection was closed, thus losing the rejection response.
5996 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5997 some early Solaris releases, but causes trouble in current releases where
5998 socklen_t is defined.
6000 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6003 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6006 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6007 that releasing the top of it at the end releases what was used for sub-
6008 expansions (unless the block got too big). However, discard this block if
6009 the first thing is a variable or header, so that we can use its block when
6010 it is dynamic (useful for very large $message_headers, for example).
6012 6. Lookups now cache *every* query, not just the most recent. A new, separate
6013 store pool is used for this. It can be recovered when all lookup caches are
6014 flushed. Lookups now release memory at the end of their result strings.
6015 This has involved some general refactoring of the lookup sources.
6017 7. Some code has been added to the store_xxx() functions to reduce the amount
6018 of flapping under certain conditions.
6020 8. log_incoming_interface used to affect only the <= reception log lines. Now
6021 it causes the local interface and port to be added to several more SMTP log
6022 lines, for example "SMTP connection from", and rejection lines.
6024 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6026 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6028 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6029 could be overwritten at the end of the current message (or the start of a
6030 new message if it was set in a HELO ACL). The value is now preserved for
6031 the duration of the SMTP connection.
6033 12. If a transport had a headers_rewrite setting, and a matching header line
6034 contained an unqualified address, that address was qualified, even if it
6035 did not match any rewriting rules. The underlying bug was that the values
6036 of the flags that permit the existence of unqualified sender and recipient
6037 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6038 non-local messages, and by -bnq for local messages) were not being
6039 preserved with the message after it was received.
6041 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6042 "next input=" as part of the text comprising the host identity instead of
6043 the correct text. The code was using the same buffer for two different
6044 strings. However, depending on which order the printing function evaluated
6045 its arguments, the bug did not always show up. Under Linux, for example, my
6046 test suite worked just fine.
6048 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6049 doesn't work with some older versions of Perl. It has been changed to "my",
6050 which in any case is probably the better facility to use.
6052 15. A really picky compiler found some instances of statements for creating
6053 error messages that either had too many or two few arguments for the format
6056 16. The size of the buffer for calls to the DNS resolver has been increased
6057 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6058 for addresses that have a lot of PTR records. This alleviates a problem; it
6059 does not fully solve it.
6061 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6062 buffer now truncates the list and logs the incident, which is the same
6063 action as happens when Exim is looking up a host name and its aliases.
6064 Previously in this situation something unpredictable would happen;
6065 sometimes it was "internal error: store_reset failed".
6067 18. If a server dropped the connection unexpectedly when an Exim client was
6068 using GnuTLS and trying to read a response, the client delivery process
6069 crashed while trying to generate an error log message.
6071 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6072 string, for example:
6074 warn message = H1: something\nH2: something
6076 the text was added as a single header line from Exim's point of view
6077 though it ended up OK in the delivered message. However, searching for the
6078 second and subsequent header lines using $h_h2: did not work. This has been
6079 fixed. Similarly, if a system filter added multiple headers in this way,
6080 the routers could not see them.
6082 20. Expanded the error message when iplsearch is called with an invalid key to
6083 suggest using net-iplsearch in a host list.
6085 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6086 ACLs are no longer actually imposed (and a message to that effect is
6089 22. If a "gecos" field in a passwd entry contained escaped characters, in
6090 particular, if it contained a \" sequence, Exim got it wrong when building
6091 a From: or a Sender: header from that name. A second bug also caused
6092 incorrect handling when an unquoted " was present following a character
6093 that needed quoting.
6095 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6096 was not being matched caselessly.
6098 24. Arranged for all hyphens in the exim.8 source to be escaped with
6101 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6102 properly. Recipient callout cache records were still being keyed to include
6103 the sender, even when use_sender was set false. This led to far more
6104 callouts that were necessary. The sender is no longer included in the key
6105 when use_sender is false.
6107 26. Added "control = submission" modifier to ACLs.
6109 27. Added the ${base62d: operator to decode base 62 numbers.
6111 28. dnsdb lookups can now access SRV records.
6113 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6114 the configuration file.
6116 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6117 (-v) mode. This makes the output for a verbose queue run more intelligible.
6119 31. Added a use_postmaster feature to recipient callouts.
6121 32. Added the $body_zerocount variable, containing the number of binary zero
6122 bytes in the message body.
6124 33. The time of last modification of the "new" subdirectory is now used as the
6125 "mailbox time last read" when there is a quota error for a maildir
6128 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6130 35. Added +ignore_unknown as a special item in host lists.
6132 36. Code for decoding IPv6 addresses in host lists is now included, even if
6133 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6134 address was recognized as an IP address, but was then not correctly decoded
6135 into binary, causing unexpected and incorrect effects when compared with
6142 1. Very minor rewording of debugging text in manualroute to say "list of
6143 hosts" instead of "hostlist".
6145 2. If verify=header_syntax was set, and a header line with an unqualified
6146 address (no domain) and a large number of spaces between the end of the
6147 name and the colon was received, the reception process suffered a buffer
6148 overflow, and (when I tested it) crashed. This was caused by some obsolete
6149 code that should have been removed. The fix is to remove it!
6151 3. When running in the test harness, delay a bit after writing a bounce
6152 message to get a bit more predictability in the log output.
6154 4. Added a call to search_tidyup() just before forking a reception process. In
6155 theory, someone could use a lookup in the expansion of smtp_accept_max_
6156 per_host which, without the tidyup, could leave open a database connection.
6158 5. Added the variables $recipient_data and $sender_data which get set from a
6159 lookup success in an ACL "recipients" or "senders" condition, or a router
6160 "senders" option, similar to $domain_data and $local_part_data.
6162 6. Moved the writing of debug_print from before to after the "senders" test
6165 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6166 problems for message scanning, either using a data ACL, or using
6167 local_scan() because the Received: header was not generated till after they
6168 were called (in order to set the time as the time of reception completion).
6169 I have revised the way this works. The header is now generated after the
6170 body is received, but before the ACL or local_scan() are called. After they
6171 are run, the timestamp in the header is updated.
6177 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6178 before starting a queue runner without re-exec. This happened only when
6179 deliver_drop_privilege was set or when the Exim user was set to root. The
6180 effect of the bug was that timeouts during subsequent deliveries caused
6181 crashes instead of being properly handled. The handler is now left at its
6182 default (and expected) setting.
6184 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6185 message, again when deliver_drop_privilege is set or Exim is run as root.
6186 The bug described in (1) was not present in this case, but the tidying up
6187 of the other signals was missing. I have made the two cases consistent.
6189 3. The ignore_target_hosts setting on a manualroute router was being ignored
6190 for hosts that were looked up using the /MX notation.
6192 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6195 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6196 operated on the sender address. After changing the $sender_address to <>
6197 for the sender address verify, Exim was re-instated it as the original
6198 (before rewriting) address, but remembering that it had rewritten it, so it
6199 wasn't rewriting it again. This bug also had the effect of breaking the
6200 sender address verification caching when the sender address was rewritten.
6202 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6203 This has been changed so that if the ip literal address matches
6204 ignore_target_hosts, the router declines.
6206 7. Added expansion conditions match_domain, match_address, and match_local_
6207 part (NOT match_host).
6209 8. The placeholder for the Received: header didn't have a length field set.
6211 9. Added code to Exim itself and to exim_lock to test for a specific race
6212 condition that could lead to file corruption when using MBX delivery. The
6213 issue is with the lockfile that is created in /tmp. If this file is removed
6214 after a process has opened it but before that process has acquired a lock,
6215 there is the potential for a second process to recreate the file and also
6216 acquire a lock. This could lead to two Exim processes writing to the file
6217 at the same time. The added code performs the same test as UW imapd; it
6218 checks after acquiring the lock that its file descriptor still refers to
6219 the same named file.
6221 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6222 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6225 11. Added the smtp_active_hostname option. If used, this will typically be made
6226 to depend on the incoming interface address. Because $interface_address is
6227 not set up until the daemon has forked a reception process, error responses
6228 that can happen earlier (such as "too many connections") no longer contain
6231 12. If an expansion in a condition on a "warn" statement fails because a lookup
6232 defers, the "warn" statement is abandoned, and the next ACL statement is
6233 processed. Previously this caused the whole ACL to be aborted.
6235 13. Added the iplsearch lookup type.
6237 14. Added ident_timeout as a log selector.
6239 15. Added tls_certificate_verified as a log selector.
6241 16. Added a global option tls_require_ciphers (compare the smtp transport
6242 option of the same name). This controls incoming TLS connections.
6244 17. I finally figured out how to make tls_require_ciphers do a similar thing
6245 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6246 before starting the TLS session.
6248 18. Tabs are now shown as \t in -bP output.
6250 19. If the log selector return_path_on_delivery was set, Exim crashed when
6251 bouncing a message because it had too many Received: header lines.
6253 20. If two routers both had headers_remove settings, and the first one included
6254 a superfluous trailing colon, the final name in the first list and the
6255 first name in the second list were incorrectly joined into one item (with a
6256 colon in the middle).
6262 1. Added -C and -D options to the exinext utility, mainly to make it easier
6263 to include in the automated testing, but these could be helpful when
6264 multiple configurations are in use.
6266 2. The exinext utility was not formatting the output nicely when there was
6267 an alternate port involved in the retry record key, nor when there was a
6268 message id as well (for retries that were specific to a specific message
6269 and a specific host). It was also confused by IPv6 addresses, because of
6270 the additional colons they contain. I have fixed the IPv4 problem, and
6271 patched it up to do a reasonable job for IPv6.
6273 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6274 delivery, the log line now contains "pipelined" if PIPELINING was used.
6276 4. An SMTP transport process used to panic and die if the bind() call to set
6277 an explicit outgoing interface failed. This has been changed; it is now
6278 treated in the same way as a connect() failure.
6280 5. A reference to $sender_host_name in the part of a conditional expansion
6281 that was being skipped was still causing a DNS lookup. This no longer
6284 6. The def: expansion condition was not recognizing references to header lines
6285 that used bh_ and bheader_.
6287 7. Added the _cache feature to named lists.
6289 8. The code for checking quota_filecount in the appendfile transport was
6290 allowing one more file than it should have been.
6292 9. For compatibility with Sendmail, the command line option
6300 and sets the incoming protocol and host name (for trusted callers). The
6301 host name and its colon can be omitted when only the protocol is to be set.
6302 Note the Exim already has two private options, -pd and -ps, that refer to
6303 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6304 "s", but I don't think that's a major issue.
6306 10. A number of refactoring changes to the code, none of which should affect
6309 (a) The number of logging options was getting close to filling up the
6310 32-bit word that was used as a bit map. I have split them into two classes:
6311 those that are passed in the argument to log_write(), and those that are
6312 only ever tested independently outside of that function. These are now in
6313 separate 32-bit words, so there is plenty of room for expansion again.
6314 There is no change in the user interface or the logging behaviour.
6316 (b) When building, for example, log lines, the code previously used a
6317 macro that called string_cat() twice, in order to add two strings. This is
6318 not really sufficiently general. Furthermore, there was one instance where
6319 it was actually wrong because one of the argument was used twice, and in
6320 one call a function was used. (As it happened, calling the function twice
6321 did not affect the overall behaviour.) The macro has been replaced by a
6322 function that can join an arbitrary number of extra strings onto a growing
6325 (c) The code for expansion conditions now uses a table and a binary chop
6326 instead of a serial search (which was left over from when there were very
6327 few conditions). Also, it now recognizes conditions like "pam" even when
6328 the relevant support is not compiled in: a suitably worded error message is
6329 given if an attempt is made to use such a condition.
6331 11. Added ${time_interval:xxxxx}.
6333 12. A bug was causing one of the ddress fields not to be passed back correctly
6334 from remote delivery subprocesses. The field in question was not being
6335 subsequently used, so this caused to problems in practice.
6337 13. Added new log selectors queue_time and deliver_time.
6339 14. Might have fixed a bug in maildirsizefile handling that threw up
6340 "unexpected character" debug warnings, and recalculated the data
6341 unnecessarily. In any case, I expanded the warning message to give more
6344 15. Added the message "Restricted characters in address" to the statements in
6345 the default ACL that block characters like @ and % in local parts.
6347 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6348 Three changes have been made:
6350 (a) There was a serious bug; a negative response to MAIL caused the whole
6351 recipient domain to be cached as invalid, thereby blocking all messages
6352 to all local parts at the same domain, from all senders. This bug has
6353 been fixed. The domain is no longer cached after a negative response to
6354 MAIL if the sender used is not empty.
6356 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6359 (c) A new callout option, "use_sender" has been added for people who want
6360 the modified behaviour.
6366 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6369 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6370 indeed breaks things for older releases.
6372 3. Added additional logging to the case where there is a problem reading data
6373 from a filter that is running in a subprocess using a pipe, in order to
6374 try to track down a specific problem.
6376 4. Testing facility fudge: when running in the test harness and attempting
6377 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6378 getting "No route to host". Convert this to a timeout.
6380 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6383 6. Some OS don't have socklen_t but use size_t instead. This affects the
6384 fifth argument of getsockopt() amongst other things. This is now
6385 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6386 can be set for individual OS. I have set it for SunOS5, OSF1, and
6387 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6388 some earlier ones do not.
6390 7. Change 4.30/15 was not doing the test caselessly.
6392 8. The standard form for an IPv6 address literal was being rejected by address
6393 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6394 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6395 this, as well as the form without the "IPv6" on the front (but only when
6396 address literals are enabled, of course).
6398 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6400 10. Exim crashed if a message with an empty sender address specified by -f
6401 encountered a router with an errors_to setting. This could be provoked only
6402 by a command such as
6406 where an empty string was supplied; "<>" did not hit this bug.
6408 11. Installed PCRE release 4.5.
6410 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6411 remained set. It is now erased.
6413 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6414 times from message ids (which are base 36 rather than the normal 62).
6416 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6417 were being counted as actual protocol errors, and logged if the log
6418 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6419 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6420 and DATA following a set of rejected RCPTs do not count as protocol errors.
6421 In other words, Exim assumes they were pipelined, though this may not
6422 actually be the case. Of course, in all cases the client gets an
6423 appropriate error code.
6425 15. If a lookup fails in an ACL condition, a message about the failure may
6426 be available; it is used if testing the ACL cannot continue, because most
6427 such messages specify what the cause of the deferral is. However, some
6428 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6429 that caused an old message to be retained and used if a later statement
6430 caused a defer, replacing the real cause of the deferral.
6432 16. If an IP address had so many PTR records that the DNS lookup buffer
6433 was not large enough to hold them, Exim could crash while trying to process
6434 the truncated data. It now detects and logs this case.
6436 17. Further to 4.21/58, another change has been made: if (and only if) the
6437 first line of a message (the first header line) ends with CRLF, a bare LF
6438 in a subsequent header line has a space inserted after it, so as not to
6439 terminate the header.
6441 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6442 unnecessarily, used atoi() instead of strtol(), and didn't check the
6443 termination when getting file sizes from file names by regex.
6445 19. Completely re-implemented the support for maildirsize files, in the light
6446 of a number of problems with the previous contributed implementation
6447 (4.30/29). In particular:
6449 . If the quota is zero, the maildirsize file is maintained, but no quota is
6452 . If the maildir directory does not exist, it is created before any attempt
6453 to write a maildirsize file.
6455 . The quota value in the file is just a cache; if the quota is changed in
6456 the transport, the new value overrides.
6458 . A regular expression is available for excluding directories from the
6461 20. The autoreply transport checks the characters in options that define the
6462 message's headers; it allows continued headers, but it was checking with
6463 isspace() after an embedded newline instead of explicitly looking for a
6466 21. If all the "regular" hosts to which an address was routed had passed their
6467 expiry times, and had not reached their retry times, the address was
6468 bounced, even if fallback hosts were defined. Now Exim should go on to try
6471 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6472 equivalent code in the SMTP transport. Some hosts send humungous responses
6473 to HELO/EHLO, more than 1024 it seems.
6475 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6476 gives compiler warnings in some environments. I've now done it "properly",
6479 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6480 (because of problems with the built-in one) was declared to return uschar *
6481 instead of char *, causing compiler failure.
6483 25. Fixed a file descriptor leak when processing alias/forward files.
6485 26. Fixed a minor format string issue in dbfn.c.
6487 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6489 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6490 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6493 29. When a sender address is verified, it is cached, to save repeating the test
6494 when there is more than one recipient in a message. However, when the
6495 verification involves a callout, it is possible for different callout
6496 options to be set for different recipients. It is too complicated to keep
6497 track of this in the cache, so now Exim always runs a verification when a
6498 callout is required, relying on the callout cache for the optimization.
6499 The overhead is duplication of the address routing, but this should not be
6502 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6503 to be verified with callout=postmaster, and the main callout worked but the
6504 postmaster check failed, the verification correctly failed. However, if a
6505 subsequent RCPT command asked for sender verification *without* the
6506 postmaster check, incorrect caching caused this verification also to fail,
6509 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6510 it was not caching the DNS options (qualify_single, search_parents) that
6511 were used when the lookup failed. A subsequent lookup with different
6512 options therefore always gave the same answer, though there were cases
6513 where it should not have. (Example: a "domains = !$mx_any" option on a
6514 dnslookup router: the "domains" option is always processed without any
6515 widening, but the router might have qualify_single set.) Now Exim uses the
6516 cached value only when the same options are set.
6518 32. Added John Jetmore's "exipick" utility to the distribution.
6520 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6521 than a timeout (e.g. a certificate is required, and is not provided), an
6522 Exim server now closes the connection immediately. Previously it waited for
6523 the client to close - but if the client is SSL, it seems that they each
6524 wait for each other, leading to a delay before one of them times out.
6526 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6527 maintained 0.8.x compatibility because I don't think many are using it, and
6528 it is clearly obsolete.
6530 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6533 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6534 client certificate was expired. A simple patch fixes this, though I don't
6535 understand the full logic of why the verify callback is called multiple
6538 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6539 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6540 which causes problems with some clients (such as the Certicom SSL Plus
6541 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6542 disables the coutermeasure allowing Eudora to connect."
6544 38. Exim was not checking that a write() to a log file succeeded. This could
6545 lead to Bad Things if a log got too big, in particular if it hit a file
6546 size limit. Exim now panics and dies if it cannot write to a log file, just
6547 as it does if it cannot open a log file.
6549 39. Modified OS/Makefile-Linux so that it now contains
6551 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6553 The two -D definitions ensure that Exim is compiled with large file
6554 support, which makes it possible to handle log files that are bigger than
6557 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6558 instance) a domain was checked against a named list that involved a lookup,
6559 causing $domain_data to be set, then another domain was checked against the
6560 same list, then the first domain was re-checked, the value of $domain_data
6561 after the final check could be wrong. In particular, if the second check
6562 failed, it could be set empty. This bug probably also applied to
6565 41. The strip_trailing_dot option was not being applied to the address given
6566 with the -f command-line option.
6568 42. The code for reading a message's header from the spool was incrementing
6569 $received_count, but never initializing it. This meant that the value was
6570 incorrect (doubled) while delivering a message in the same process in which
6571 it was received. In the most common configuration of Exim, this never
6572 happens - a fresh exec is done - but it can happen when
6573 deliver_drop_privilege is set.
6575 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6576 it now includes up to 150 characters of the unexpected data in the log
6579 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6580 and building data strings. The size of both of these buffers was 10 000
6581 bytes - far larger than anybody would *ever* want, thought I. Needless to
6582 say, somebody hit the limit. I have increased the maximum line length to
6583 20 000 and the maximum data length of concatenated lines to 100 000. I have
6584 also fixed two bugs, because there was no checking on these buffers. Tsk,
6585 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6586 buffer is too small.
6588 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6589 lsearch lookups. Now it does.
6591 46. When parsing a route_list item in a manualroute router, a fixed-length
6592 buffer was used for the list of hosts. I made this 1024 bytes long,
6593 thinking that nobody would ever have a list of hosts that long. Wrong.
6594 Somebody had a whole pile of complicated expansion conditions, and the
6595 string was silently truncated, leading to an expansion error. It turns out
6596 that it is easier to change to an unlimited length (owing to other changes
6597 that have happened since this code was originally written) than to build
6598 structure for giving a limitation error. The length of the item that
6599 expands into the list of hosts is now unlimited.
6601 47. The lsearch lookup could not handle data where the length of text line was
6602 more than 4095 characters. Such lines were truncated, leading to shortened
6603 data being returned. It should now handle lines of any length.
6605 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6606 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6609 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6610 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6611 no longer happens in comment lines. A list of replacements is now placed
6612 at the head of all of the source files, except those whose only change is
6613 to replace PERL_COMMAND in the very first #! line.
6615 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6616 messages on the queue, with a bottom-up merge sort, using code contributed
6617 by Michael Haardt. This should make operations like -bp somewhat faster on
6618 large queues. It won't affect queue runners, except when queue_run_in_order
6621 51. Installed eximstats 1.31 in the distribution.
6623 52. Added support for SRV lookups to the dnslookup router.
6625 53. If an ACL referred to $message_body or $message_body_end, the value was not
6626 reset for any messages that followed in the same SMTP session.
6628 54. The store-handling optimization for building very long strings was not
6629 differentiating between the different store pools. I don't think this
6630 actually made any difference in practice, but I've tidied it.
6632 55. While running the routers to verify a sender address, $sender_address
6633 was still set to the sender address. This is wrong, because when routing to
6634 send a bounce to the sender, it would be empty. Therefore, I have changed
6635 it so that, while verifying a sender address, $sender_address is set to <>.
6636 (There is no change to what happens when verifying a recipient address.)
6638 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6639 target A or AAAA records (if not already returned) without resetting the
6640 qualify_single or search_parents options of the DNS resolver. These are
6641 inappropriate in this case because the targets of MX and SRV records must
6642 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6643 target that, when qualified, matched something in the local domain. These
6644 two options are now turned off when doing these lookups.
6646 57. It seems that at least some releases of Reiserfs (which does not have the
6647 concept of a fixed number of inodes) returns zero and not -1 for the
6648 number of available inodes. This interacted badly with check_spool_inodes,
6649 which assumed that -1 was the "no such thing" setting. What I have done is
6650 to check that the total number of inodes is greater than zero before doing
6651 the test of how many are available.
6653 58. When a "warn" ACL statement has a log_message modifier, the message is
6654 remembered, and not repeated. This is to avoid a lot of repetition when a
6655 message has many recipients that cause the same warning to be written.
6656 However, Exim was preserving the list of already written lines for an
6657 entire SMTP session, which doesn't seem right. The memory is now reset if a
6658 new message is started.
6660 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6661 debugging output unless log_rewrite was also set.
6663 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6664 of (int)(handle) when we know that handle contains (void *)(-1).
6666 61. The Exim daemon panic-logs an error return when it closes the incoming
6667 connection. However "connection reset by peer" seems to be common, and
6668 isn't really an error worthy of noting specially, so that particular error
6671 62. When Exim is trying to find all the local interfaces, it used to panic and
6672 die if the ioctl to get the interface flags failed. However, it seems that
6673 on at least one OS (Solaris 9) it is possible to have an interface that is
6674 included in the list of interfaces, but for which you get a failure error
6675 for this call. This happens when the interface is not "plumbed" into a
6676 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6677 failure of the "get flags" call assumes that the interface is down.
6679 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6680 makes life easier for people who are doing arithmetic on fields extracted
6681 from dates, where you often get leading zeros that should not be
6682 interpreted as octal.
6684 64. Added qualify_domain to the redirect router, to override the global
6687 65. If a pathologically long header line contained very many addresses (the
6688 report of this problem mentioned 10 000) and each of them was rewritten,
6689 Exim could use up a very large amount of memory. (It kept on making new
6690 copies of the header line as it rewrote, and never released the old ones.)
6691 At the expense of a bit more processing, the header rewriting function has
6692 been changed so that it no longer eats memory in this way.
6694 66. The generation of the Received: header has been moved from the time that a
6695 message starts to be received, to the time that it finishes. The timestamp
6696 in the Received: header should now be very close to that of the <= log
6697 line. There are two side-effects of this change:
6699 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6700 logged header lines no longer include the local Received: line, because
6701 it has not yet been created. The same applies to a copy of the message
6702 that is returned to a non-SMTP sender when a message is rejected.
6704 (b) When a filter file is tested using -bf, no additional Received: header
6705 is added to the test message. After some thought, I decided that this
6708 This change does not affect the value of $received_for. It is still set
6709 after address rewriting, but before local_scan() is called.
6711 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6713 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6714 gave an unhelpful panic error message, and a defer error. I have managed to
6715 change this behaviour so that it now rejects any supplied certificate,
6716 which seems right, as the list of acceptable certificates is empty.
6718 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6719 gave an unhelpful defer error. I have not managed to make this reject any
6720 supplied certificates, but the error message it gives is "no certificate
6721 supplied", which is not helpful.
6723 70. exigrep's output now also includes lines that are not associated with any
6724 message, but which match the given pattern. Implemented by a patch from
6725 Martin Sluka, which also tidied up the Perl a bit.
6727 71. Recipient callout verification, like sender verification, was using <> in
6728 the MAIL FROM command. This isn't really the right thing, since the actual
6729 sender may affect whether the remote host accepts the recipient or not. I
6730 have changed it to use the actual sender in the callout; this means that
6731 the cache record is now keyed on a recipient/sender pair, not just the
6732 recipient address. There doesn't seem to be a real danger of callout loops,
6733 since a callout by the remote host to check the sender would use <>.
6734 [SEE ABOVE: changed after hitting problems.]
6736 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6737 temporary errors. However, in the case of such a code being given after
6738 the end of a data transmission (i.e. after ".") Exim was failing to write
6739 a retry record for the message. (Yes, there was some broken host that was
6740 actually sending 8xx at this point.)
6742 73. An unknown lookup type in a host list could cause Exim to panic-die when
6743 the list was checked. (An example that provoked this was putting <; in the
6744 middle of a list instead of at the start.) If this happened during a DATA
6745 ACL check, a -D file could be left lying around. This kind of configuration
6746 error no longer causes Exim to die; instead it causes a defer error. The
6747 incident is still logged to the main and panic logs.
6749 74. Buglet left over from Exim 3 conversion. The message "too many messages
6750 in one connection" was written to the rejectlog but not the mainlog, except
6751 when address rewriting (yes!) was being logged.
6753 75. Added write_rejectlog option.
6755 76. When a system filter was run not as root (that is, when system_filter_user
6756 was set), the values of the $n variables were not being returned to the
6757 main process; thus, they were not subsequently available in the $sn
6760 77. Added +return_path_on_delivery log selector.
6762 78. A connection timeout was being treated differently from recipients deferred
6763 when testing hosts_max_try with a message that was older than the host's
6764 retry timeout. (The host should not be counted, thus allowing all hosts to
6765 be tried at least once before bouncing.) This may have been the cause of an
6766 occasionally reported bug whereby a message would remain on the queue
6767 longer than the retry timeout, but would be bounced if a delivery was
6768 forced. I say "may" because I never totally pinned down the problem;
6769 setting up timeout/retry tests is difficult. See also the next item.
6771 79. The ultimate address timeout was not being applied to errors that involved
6772 a combination of host plus message (for example, a timeout on a MAIL
6773 command). When an address resolved to a number of possible hosts, and they
6774 were not all tried for each delivery (e.g. because of hosts_max_try), a
6775 message could remain on the queue longer than the retry timeout.
6777 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6780 81. Fixed an obscure SMTP outgoing bug which required at least the following
6781 conditions: (a) there was another message waiting for the same server;
6782 (b) the server returned 5xx to all RCPT commands in the first message so
6783 that the message was not completed; (c) the server dropped the connection
6784 or gave a negative response to the RSET that Exim sends to abort the
6785 transaction. The observed case was a dropped connection after DATA that had
6786 been sent in pipelining mode. That is, the server had advertised PIPELINING
6787 but was not implementing it correctly. The effect of the bug was incorrect
6788 behaviour, such as trying another host, and this could lead to a crash.
6794 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6795 and daemon.c were passed as pointers to ints; they should have been
6796 pointers to socklen_t variables (which are typically unsigned ints).
6798 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6801 3. Fixed a really odd bug that affected only the testing scheme; patching a
6802 certain fixed string in the binary changed the value of another string that
6803 happened to be identical to the end of the original first string.
6805 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6806 name", it returns that address as the IP address. On some operating
6807 systems (e.g. Solaris), it also passes back the IP address string as the
6808 "host name". However, on others (e.g. Linux), it passes back an empty
6809 string. Exim wasn't checking for this, and was changing the host name to an
6810 empty string, assuming it had been canonicalized.
6812 5. Although rare, it is permitted to have more than one PTR record for a given
6813 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6814 all the names associated with an address, because they do in Solaris.
6815 However, it seems that they do not in Linux for data that comes from the
6816 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6817 I found this out when I moved to a new Linux workstation and tried to run
6818 the Exim test suite.
6820 To get round this problem I have changed the code so that it now does its
6821 own call to the DNS to look up PTR records when searching for a host name.
6822 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6823 addresses that are only in /etc/hosts are still found.
6825 This behaviour is, however, controlled by an option called host_lookup_
6826 order, which defaults to "bydns:byaddr". If people want to use the other
6827 order, or indeed, just use one or the other means of lookup, they can
6828 specify it in this variable.
6830 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6831 some operating systems, this comes back from gethostbyaddr() as an empty
6832 string, and this is what Exim used to test for. However, it seems that in
6833 other systems, "." is yielded. Exim now tests for this case too.
6835 7. The values of check_spool_space and check_log_space are now held internally
6836 as a number of kilobytes instead of an absolute number of bytes. If a
6837 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6838 kilobyte. This means that much larger values can be stored.
6840 8. Exim monitor: an attempt to get the action menu when not actually pointing
6841 at a message produces an empty menu entitled "No message selected". This
6842 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6843 no entries in it ("Shell widget menu has zero width and/or height"). So I
6844 have added a single, blank menu entry in this case.
6846 9. Added ${quote_local_part.
6848 10. MIME decoding is now applied to the contents of Subject: header lines when
6851 11. Now that a reference to $sender_host_address automatically causes a reverse
6852 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6853 host lookup before query-style lookups in lists that might use this
6854 variable. This has therefore been abolished, and the "net-" prefix is no
6855 longer necessary for query-style lookups.
6857 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6858 have been a typo for LFLAGS, so it has been changed.
6860 13. The install script calls Exim with "-C /dev/null" in order to find the
6861 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6862 to be output. However, since Exim outputs its version number before the
6863 error, it didn't break the script. It just looked ugly. I fixed this by
6864 always allowing "-C /dev/null" if the caller is root.
6866 14. Ignore overlarge ACL variable number when reading spool file - insurance
6867 against a later release with more variables having written the file.
6869 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6870 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6871 this, as well as the form without the "IPv6" on the front.
6873 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6874 OS/Makefile-Darwin file.
6876 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6877 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6879 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6880 variable. However, some OS use ints for inodes. I've added cast to long int
6881 to get rid of the compiler warning.
6883 19. I had forgotten to lock out "/../" in configuration file names when
6884 ALT_CONFIG_PREFIX was set.
6886 20. Routers used for verification do not need to specify transports. However,
6887 if such a router generated a host list, and callout was configured, Exim
6888 crashed, because it could not find a port number from the (non-existent)
6889 transport. It now assumes port 25 in this circumstance.
6891 21. Added the -t option to exigrep.
6893 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6894 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6895 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6896 them is set, LOOKUP_LSEARCH is forced.
6898 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6900 24. Added sender and host information to the "rejected by local_scan()" log
6901 line; previously there was no indication of these.
6903 25. Added .include_if_exists.
6905 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6906 Linux. It turns out that not all file systems support this. Apparently some
6907 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6908 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6909 not supported on the file descriptor, is now ignored when Exim is trying to
6910 sync a directory. This applies only to Linux.
6912 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6914 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6915 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6918 29. Added support for maildirsize files from supplied patch (modified a bit).
6920 30. The use of :fail: followed by an empty string could lead Exim to respond to
6921 sender verification failures with (e.g.):
6923 550 Verification failed for <xxx>
6924 550 Sender verify failed
6926 where the first response line was missing the '-' that indicates it is not
6927 the final line of the response.
6929 31. The loop for finding the name of the user that called Exim had a hardwired
6930 limit of 10; it now uses the value of finduser_retries, which is used for
6931 all other user lookups.
6933 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6936 33. Exim was neglecting to zero errno before one call of strtol() when
6937 expanding a string and expecting an integer value. On some systems this
6938 resulted in spurious "integer overflow" errors. Also, it was casting the
6939 result into an int without checking.
6941 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6942 did not work. The code looks as if it has *never* worked, though it appears
6943 to have been documented since at least release 1.62. I have made it work.
6945 35. The "timeout_DNS" error in retry rules, also documented since at least
6946 1.62, also never worked. As it isn't clear exactly what this means, and
6947 clearly it isn't a major issue, I have abolished the feature by treating it
6948 as "timeout", and writing a warning to the main and panic logs.
6950 36. The display of retry rules for -brt wasn't always showing the error code
6953 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6954 timeout_connect_A, timeout_connect_MX.
6956 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6957 to the empty sender.
6959 39. The daemon was not analysing the content of -oX till after it had closed
6960 stderr and disconnected from the controlling terminal. This meant that any
6961 syntax errors were only noted on the panic log, and the return code from
6962 the command was 0. By re-arranging the code a little, I've made the
6963 decoding happen first, so such errors now appear on stderr, and the return
6964 code is 1. However, the actual setting up of the sockets still happens in
6965 the disconnected process, so errors there are still only recorded on the
6968 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6969 connections (as happens on some IP stacks) was logged at start up time as
6970 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6971 it from "IPv6 and IPv4", which means that two separate sockets are being
6974 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6975 says whether AF_INET or AF_INET6 was passed as an argument.
6977 42. Exiwhat output was messed up when time zones were included in log
6980 43. Exiwhat now gives more information about the daemon's listening ports,
6981 and whether -tls-on-connect was used.
6983 44. The "port" option of the smtp transport is now expanded.
6985 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6986 silently ignored. Now an error message is written to the main and panic
6989 46. There's a new ACL modifier called "logwrite" which writes to a log file
6990 as soon as it is encountered.
6992 47. Added $local_user_uid and $local_user_gid at routing time.
6994 48. Exim crashed when trying to verify a sender address that was being
6997 49. Exim was recognizing only a space character after ".include". It now also
6998 recognizes a tab character.
7000 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7001 extracting the relevant information from the specification. The man page no
7002 longer contains scrambled data for the -d option, and I've added a section
7003 at the front about calling Exim under different names.
7005 51. Added "extra_headers" argument to the "mail" command in filter files.
7007 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7010 53. Installed eximstats 1.29.
7012 54. Added transport_filter_timeout as a generic transport option.
7014 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7015 Cc: header lines. This was required by RFC 822, but it not required by RFC
7018 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7019 incoming messages that did not have them. Now it does so only if the
7020 message originates locally, that is, if there is no associated remote host
7021 address. When Resent- header lines are present, this applies to the Resent-
7022 lines rather than the non-Resent- lines.
7024 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7025 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7027 58. Messages for configuration errors now include the name of the main
7028 configuration file - useful now that there may be more than one file in a
7029 list (.included file names were always shown).
7031 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7032 for those rare installations that do not start the daemon as root or run it
7033 setuid root. I've cut out the call to initgroups() if the daemon is not
7036 60. The Exim user and group can now be bound into the binary as text strings
7037 that are looked up at the start of Exim's processing.
7039 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7041 62. Added $mailstore_basename variable.
7043 63. Installed patch to sieve.c from Michael Haardt.
7045 64. When Exim failed to open the panic log after failing to open the main log,
7046 the original message it was trying to log was written to stderr and debug
7047 output, but if they were not available (the usual case in production), it
7048 was lost. Now it is written to syslog before the two lines that record the
7049 failures to open the logs.
7051 65. Users' Exim filters run in subprocesses under the user's uid. It is
7052 possible for a "deliver" command or an alias in a "personal" command to
7053 provoke an address rewrite. If logging of address rewriting is configured,
7054 this fails because the process is not running as root or exim. There may be
7055 a better way of dealing with this, but for the moment (because 4.30 needs
7056 to be released), I have disabled address rewrite logging when running a
7057 filter in a non-root, non-exim process.
7063 1. The buildconfig auxiliary program wasn't quoting the value set for
7064 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7065 not defined. This bug was masked in 4.22 by the effect that was fixed in
7068 2. Some messages that were rejected after a message id was allocated were
7069 shown as "incomplete" by exigrep. It no longer does this for messages that
7070 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7072 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7073 have allow_domain_literals set, the ID did not get logged in the <= line.
7074 Domain literals are now always recognized in Message-ID: header lines.
7076 4. The first argument for a ${extract expansion item is the key name or field
7077 number. Leading and trailing spaces in this item were not being ignored,
7078 causing some misleading effects.
7080 5. When deliver_drop_privilege was set, single queue runner processes started
7081 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7082 same command in the process it spins off) were not dropping privilege.
7084 6. When the daemon running as "exim" started a queue runner, it always
7085 re-executed Exim in the spun-off process. This is a waste of effort when
7086 deliver_drop_privilege is set. The new process now just calls the
7087 queue-runner function directly.
7093 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7096 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7097 ignored. Though the use of -oP was forcing the writing of a pid file, it
7098 was always written to the default place.
7100 3. If the message "no IP address found for host xxxx" is generated during
7101 incoming verification, it is now followed by identification of the incoming
7102 connection (so you can more easily find what provoked it).
7104 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7106 5. Added some features to "harden" Exim a bit more against certain attacks:
7108 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7109 be put in Local/Makefile. This is like the never_users runtime option,
7110 but it cannot be overridden. The default setting is "root".
7112 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7113 prefix string with which any file named in a -C command line option
7116 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7117 is retained for -C and -D only if the caller of Exim is root. Without
7118 it, the exim user may also use -C and -D and retain privilege.
7120 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7121 command line option is disabled.
7123 6. Macro names set by the -D option must start with an upper case letter, just
7124 like macro names defined in the configuration file.
7126 7. Added "dereference=" facility to LDAP.
7128 8. Two instances of the typo "uknown" in the source files are fixed.
7130 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7131 the Configure-Makefile script screwed up while processing it.
7133 10. Incorporated PCRE 4.4.
7135 11. The SMTP synchronization check was not operating right at the start of an
7136 SMTP session. For example, it could not catch a HELO sent before the client
7137 waited for the greeting. There is now a check for outstanding input at the
7138 point when the greeting is written. Because of the duplex, asynchronous
7139 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7140 way, but not yet received, when the check is performed.
7142 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7143 on TCP/IP sockets, because this apparently causes some broken clients to
7146 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7147 unchanged) from the Cygwin maintainer.
7149 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7150 was supported instead of testing for mbx. Effectively a typo.
7152 15. The spa authenticator server code was not checking that the input it
7153 received was valid base64.
7155 16. The debug output line for the "set" modifier in ACLs was not showing the
7156 name of the variable that was being set.
7158 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7160 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7161 lookup on its own. Something else was needed to trigger the lookup. For
7162 example, a match in host_lookup or the need for a host name in a host list.
7163 Now, if $sender_host_name is referenced and the host name has not yet been
7164 looked up, a lookup is performed. If the lookup fails, the variable remains
7165 empty, and $host_lookup_failed is set to "1".
7167 19. Added "eqi" as a case-independent comparison operator.
7169 20. The saslauthd authentication condition could segfault if neither service
7170 nor realm was specified.
7172 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7173 error message that was logged was misleading, and incoming SMTP
7174 connections were dropped. The message is now more accurate, and temporary
7175 errors are given to SMTP connections.
7177 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7178 (except RSET) with a 421 error, until QUIT is received. However, it was
7179 failing to send a response to QUIT.
7181 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7182 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7183 ACL is now run after the helo_try_verify_hosts code.
7185 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7186 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7187 case-independent, so other case variants are also recognized). Apparently
7188 some systems use these upper case variants.
7190 25. If more than two messages were waiting for the same host, and a transport
7191 filter was specified for the transport, Exim sent two messages over the
7192 same TCP/IP connection, and then failed with "socket operation on non-
7193 socket" when it tried to send the third.
7195 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7197 27. The extern definition of crypt16() in expand.c was not being excluded when
7198 the OS had its own crypt16() function.
7200 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7201 as a preferred synonym for return_size_limit, both as an option and as an
7204 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7206 30. Changed the default configuration ACL to relax the local part checking rule
7207 for addresses that are not in any local domains. For these addresses,
7208 slashes and pipe symbols are allowed within local parts, but the sequence
7209 /../ is explicitly forbidden.
7211 31. SPA server authentication was not clearing the challenge buffer before
7214 32. log_message in a "warn" ACL statement was writing to the reject log as
7215 well as to the main log, which contradicts the documentation and doesn't
7216 seem right (because no rejection is happening). So I have stopped it.
7218 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7219 However, I am unable to do any testing of this.
7221 34. Fixed an infelicity in the appendfile transport. When checking directories
7222 for a mailbox, to see if any needed to be created, it was accidentally
7223 using path names with one or more superfluous leading slashes; tracing
7224 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7226 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7227 contents are added to the log line that is written for every discarded
7228 recipient. (Previously a log_message setting was ignored.)
7230 36. The ${quote: operator now quotes the string if it is empty.
7232 37. The install script runs exim in order to find its version number. If for
7233 some reason other than non-existence or emptiness, which it checks, it
7234 could not run './exim', it was installing it with an empty version number,
7235 i.e. as "exim-". This error state is now caught, and the installation is
7238 38. An argument was missing from the function that creates an error message
7239 when Exim fails to connect to the socket for saslauthd authentication.
7240 This could cause Exim to crash, or give a corrupted message.
7242 39. Added isip, isip4, and isip6 to ${if conditions.
7244 40. The ACL variables $acl_xx are now saved with the message, and can be
7245 accessed later in routers, transports, and filters.
7247 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7248 strings in the file are not string-expanded.
7250 42. If a MAIL command specified a SIZE value that was too large to fit into an
7251 int variable, the check against message_size_limit failed. Such values are
7252 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7253 day this will have to be increased, but I don't think I want to be around
7254 when emails are that large.
7261 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7262 iconv() is not standard in FreeBSD.
7264 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7265 IPv6 enabled. The observed symptom was a segmentation fault on return from
7266 the function os_common_find_running_interfaces() in src/os.c.
7268 3. In the check_special_case() function in daemon.c I had used "errno" as an
7269 argument name, which causes warnings on some systems. This was basically a
7270 typo, since it was named "eno" in the comments!
7272 4. The code that waits for the clock to tick (at a resolution of some fraction
7273 of a second) so as to ensure message-id uniqueness was always waiting for
7274 at least one whole tick, when it could have waited for less. [This is
7275 almost certainly not relevant at current processor speeds, where it is
7276 unlikely to ever wait at all. But we try to future-proof.]
7278 5. The function that sleeps for a time interval that includes fractions of a
7279 second contained a race. It did not block SIGALRM between setting the
7280 timer, and suspending (a couple of lines later). If the interval was short
7281 and the sigsuspend() was delayed until after it had expired, the suspension
7282 never ended. On busy systems this could lead to processes getting stuck for
7285 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7286 process, before it forks any delivery processes. The open lookup caching
7287 mechanism meant that the open file or database connection was passed into
7288 the delivery process. The problem was that delivery processes always tidy
7289 up cached lookup data. This could cause a problem for the next delivery
7290 process started by the queue runner, because the external queue runner
7291 process does not know about the closure. So the next delivery process
7292 still has data in the lookup cache. In the case of a file lookup, there was
7293 no problem because closing a file descriptor in a subprocess doesn't affect
7294 the parent. However, if the lookup was caching a connection to a database,
7295 the connection was closed, and the second delivery process was likely to
7296 see errors such as "PGSQL: query failed: server closed the connection
7297 unexpectedly". The problem has been fixed by closing all cached lookups
7298 in a queue runner before running a delivery process.
7300 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7301 seem to have the "const" qualifier which it has on other OS. I've
7304 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7305 *of the same type* (client or server) with the same public name that an
7306 error should be diagnosed.
7308 9. When Exim looked up a host name for an IP address, but failed to find the
7309 original IP address when looking up the host name (a safety check), it
7310 output the message "<ip address> does not match any IP for NULL", which was
7311 confusing, to say the least. The bug was that the host name should have
7312 appeared instead of "NULL".
7314 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7315 user that is built into the binary, and the -C or -D options is used, root
7316 privilege is dropped before the configuration file is read. In addition,
7317 logging is switched to stderr instead of the normal log files. If the
7318 configuration then re-defines the Exim user, the unprivileged environment
7319 is probably not what is expected, so Exim logs a panic warning message (but
7322 However, if deliver_drop_privilege is set, the unprivileged state may well
7323 be exactly what is intended, so the warning has been cut out in that case,
7324 and Exim is allowed to try to write to its normal log files.
7330 1. smtp_return_error_details was not giving details for temporary sender
7331 or receiver verification errors.
7333 2. Diagnose a configuration error if two authenticators have the same public
7336 3. Exim used not to create the message log file for a message until the first
7337 delivery attempt. This could be confusing when incoming messages were held
7338 for policy or load reasons. The message log file is now created at the time
7339 the message is received, and an initial "Received" line is written to it.
7341 4. The automatically generated man page for command line options had a minor
7342 bug that caused no ill effects; however, a more serious problem was that
7343 the procedure for building the man page automatically didn't always
7344 operate. Consequently, release 4.20 contains an out-of-date version. This
7345 shouldn't happen again.
7347 5. When building Exim with embedded Perl support, the script that builds the
7348 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7349 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7351 6. The freeze_tell option was not being used for messages that were frozen on
7352 arrival, either by an ACL or by local_scan().
7354 7. Added the smtp_incomplete_transaction log selector.
7356 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7357 was accepting AUTH without a new EHLO.
7359 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7360 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7363 10. Logging of TCP/IP connections (when configured) now happens in the main
7364 daemon process instead of the child process, so that the TCP/IP connection
7365 count is more accurate (but it can never be perfect).
7367 11. The use of "drop" in a nested ACL was not being handled correctly in the
7368 outer ACL. Now, if condition failure induced by the nested "drop" causes
7369 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7370 or "require"), the connection is dropped.
7372 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7373 that yield "discard" can now be used with an "accept" or a "discard" verb,
7374 but an error is generated for any others (because I can't see a useful way
7375 to define what should happen).
7377 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7378 are now processed in the same way as lines in the Exim configuration file.
7379 In particular, continuation lines are supported.
7381 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7383 15. Added -ti meaning -t -i.
7385 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7386 domains, and warn by logging if others are found.
7388 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7389 returned from GIFCONF when Exim is trying to find the list of interfaces on
7390 a host. The code in os.c has been modified to copy each ifreq to an aligned
7391 structure in all cases.
7393 Also, in some cases, the returned ifreq's were being copied to a 'struct
7394 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7395 means the last couple of bytes of an IPv6 address could be chopped if the
7396 ifreq contained only a normal sockaddr (14 bytes storage).
7398 18. Named domain lists were not supported in the hosts_treat_as_local option.
7399 An entry such as +xxxx was not recognized, and was treated as a literal
7402 19. Ensure that header lines added by a DATA ACL are included in the reject log
7403 if the ACL subsequently rejects the message.
7405 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7406 MD5 (which is deprecated).
7408 21. When testing a filter file using -bf, Exim was writing a message when it
7409 took the sender from a "From " line in the message, but it was not doing so
7410 when it took $return_path from a Return-Path: header line. It now does.
7412 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7413 with a valid header line field name (a series of printing characters
7414 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7416 23. Changed "disc" in the source to "disk" to conform to the documentation and
7417 the book and for uniformity.
7419 24. Ignore Sendmail's -Ooption=value command line item.
7421 25. When execve() failed while trying to run a command in a pipe transport,
7422 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7423 could be confused with a return value of 69 from the command itself. This
7424 has been changed to 127, the value the shell returns if it is asked to run
7425 a non-existent command. The wording for the related log line suggests a
7426 non-existent command as the problem.
7428 26. If received_header_text expands to an empty string, do not add a Received:
7429 header line to the message. (Well, it adds a token one on the spool, but
7430 marks it "old" so that it doesn't get used or transmitted.)
7432 27. Installed eximstats 1.28 (addition of -nt option).
7434 28. There was no check for failure on the call to getsockname() in the daemon
7435 code. This can fail if there is a shortage of resources on the system, with
7436 ENOMEM, for example. A temporary error is now given on failure.
7438 29. Contrary to the C standard, it seems that in some environments, the
7439 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7440 program. Exim now does this explicitly; it affects the formatting of
7441 timestamps using strftime().
7443 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7444 complaints. I've now initialized all the variables, to avoid this.
7446 32. Header lines added by a system filter were not being "seen" during
7447 transport-time rewrites.
7449 33. The info_callback() function passed to OpenSSL is set up with type void
7450 (*)(SSL *, int, int), as described somewhere. However, when calling the
7451 function (actually a macro) that sets it up, the type void(*)() is
7452 expected. I've put in a cast to prevent warnings from picky compilers.
7454 34. If a DNS black list lookup found a CNAME record, but there were no A
7455 records associated with the domain it pointed at, Exim crashed.
7457 35. If a DNS black list lookup returned more than one A record, Exim ignored
7458 all but the first. It now scans all returned addresses if a particular IP
7459 value is being sought. In this situation, the contents of the
7460 $dnslist_value variable are a list of all the addresses, separated by a
7463 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7464 to accept a host name and all its aliases if the forward lookup for any of
7465 them yielded the IP address of the incoming connection. Now it accepts only
7466 those names whose forward lookup yields the correct IP address. Any other
7467 names are discarded. This closes a loophole whereby a rogue DNS
7468 administrator could create reverse DNS records to break through a
7469 wildcarded host restriction in an ACL.
7471 37. If a user filter or a system filter that ran in a subprocess used any of
7472 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7473 the wrong values were passed to the pipe command ($thisaddress had the
7474 value of $0, $0 had the value of $1, etc). This bug was introduced by
7475 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7477 38. Improved the line breaking for long SMTP error messages from ACLs.
7478 Previously, if there was no break point between 40 and 75 characters, Exim
7479 left the rest of the message alone. Two changes have been made: (a) I've
7480 reduced the minimum length to 35 characters; (b) if it can't find a break
7481 point between 35 and 75 characters, it looks ahead and uses the first one
7482 that it finds. This may give the occasional overlong line, but at least the
7483 remaining text gets split now.
7485 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7486 file descriptors might be low, and that setting 1000 would always raise it.
7487 It turns out that in some environments, the limit is already over 1000 and
7488 that lowering it causes trouble. So now Exim takes care not to decrease it.
7490 40. When delivering a message, the value of $return_path is set to $sender_
7491 address at the start of routing (routers may change the value). By an
7492 oversight, this default was not being set up when an address was tested by
7493 -bt or -bv, which affected the outcome if any router or filter referred to
7496 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7497 log only when "message" or "log_message" are set. However, if one of the
7498 conditions was an address verification, or a call to a nested ACL, the
7499 messages generated by the underlying test were being passed through. This
7500 no longer happens. The underlying message is available in $acl_verify_
7501 message for both "message" and "log_message" expansions, so it can be
7502 passed through if needed.
7504 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7505 new expansion $bh_ to give the encoded byte string without charset
7506 translation. Translation happens only if iconv() is available; HAVE_ICONV
7507 indicates this at build time. HEADERS_CHARSET gives the charset to
7508 translate to; headers_charset can change it in the configuration, and
7509 "headers charset" can change it in an individual filter file.
7511 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7512 that creates RFC 2047 encoded "words" labels them as that charset instead
7513 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7514 expansion operator; (ii) when Exim creates a From: line for a local
7515 message; (iii) when a header line is rewritten to include a "phrase" part.
7517 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7518 buggy, causing it to skip the first lines of messages whose message ID
7519 ended in 'D'. This would not have bitten before Exim release 4.14, because
7520 message IDs were unlikely to end in 'D' before then. The effect was to have
7521 incorrect size information for certain domains.
7523 45. #include "config.h" was missing at the start of the crypt16.c module. This
7524 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7527 46. If there was a timeout during a "random" callout check, Exim treated it as
7528 a failure of the random address, and carried on sending RSET and the real
7529 address. If the delay was just some slowness somewhere, the response to the
7530 original RCPT would be taken as a response to RSET and so on, causing
7531 mayhem of various kinds.
7533 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7534 when I implemented it. It didn't allow for the fact that some option values
7535 may legitimately be negative (e.g. size_addition), and it didn't even do
7536 the right test for positive values.
7538 48. Domain names in DNS records are case-independent. Exim always looks them up
7539 in lower case. Some resolvers return domain names in exactly the case they
7540 appear in the zone file, that is, they may contain uppercase letters. Not
7541 all resolvers do this - some return always lower case. Exim was treating a
7542 change of case by a resolver as a change of domain, similar to a widening
7543 of a domain abbreviation. This triggered its re-routing code and so it was
7544 trying to route what was effectively the same domain again. This normally
7545 caused routing to fail (because the router wouldn't handle the domain
7546 twice). Now Exim checks for this case specially, and just changes the
7547 casing of the domain that it ultimately uses when it transmits the message
7550 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7553 50. If a filter generated a file delivery with a non-absolute name (possible if
7554 no home directory exists for the router), the forbid_file option was not
7557 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7558 the existing equality matching.
7560 52. Exim was using ints instead of ino_t variables in some places where it was
7561 dealing with inode numbers.
7563 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7564 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7565 called TMPDIR, and if it finds it is different, it changes its value.
7567 54. The smtp_printf() function is now made available to local_scan() so
7568 additional output lines can be written before returning. There is also an
7569 smtp_fflush() function to enable the detection of a dropped connection.
7570 The variables smtp_input and smtp_batched_input are exported to
7573 55. Changed the default runtime configuration: the message "Unknown user"
7574 has been removed from the ACL, and instead placed on the localuser router,
7575 using the cannot_route_message feature. This means that any verification
7576 failures that generate their own messages won't get overridden. Similarly,
7577 the "Unrouteable address" message that was in the ACL for unverifiable
7578 relay addresses has also been removed.
7580 56. Added hosts_avoid_esmtp to the smtp transport.
7582 57. The exicyclog script was not checking for the esoteric option
7583 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7584 will work only if exicyclog is run under the appropriate euid.
7586 58. Following a discussion on the list, the rules by which Exim recognises line
7587 endings on incoming messages have been changed. The -dropcr and drop_cr
7588 options are now no-ops, retained only for backwards compatibility. The
7589 following line terminators are recognized: LF CRLF CR. However, special
7590 processing applies to CR:
7592 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7593 nor a local message in the state where . is a terminator.
7595 (ii) If a bare CR is encountered in a header line, an extra space is added
7596 after the line terminator so as not to end the header. The reasoning
7597 behind this is that bare CRs in header lines are most likely either
7598 to be mistakes, or people trying to play silly games.
7600 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7601 was being incorrectly given as 18 bytes larger than it should have been.
7602 This is a VOB (very old bug).
7604 60. This may never have affected anything current, but just in case it has:
7605 When the local host is found other than at the start of a list of hosts,
7606 the local host, those with the same MX, and any that follow, are discarded.
7607 When the list in question was part of a longer list of hosts, the following
7608 hosts (not currently being processed) were also being discarded. This no
7609 longer happens. I'm not sure if this situation could ever has previously
7612 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7615 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7616 header. This is something that is recommended in a new Internet Draft, and
7617 is something that is documented as being done by Sendmail. There are two
7618 possible values. For messages generated by the autoreply transport, Exim
7621 Auto-Submitted: auto-replied
7623 whereas for all other generated messages (e.g. bounces) it adds
7625 Auto-Submitted: auto-generated
7627 63. The "personal" condition in filters now includes a test for the
7628 Auto-Submitted: header. If it contains the string "auto-" the message it
7629 not considered personal.
7631 64. Added rcpt_include_affixes as a generic transport option.
7633 65. Added queue_only_override (default true).
7635 66. Added the syslog_duplication option.
7637 67. If what should have been the first header line of a message consisted of
7638 a space followed by a colon, Exim was mis-interpreting it as a header line.
7639 It isn't of course - it is syntactically invalid and should therefore be
7640 treated as the start of the message body. The misbehaviour could have
7641 caused a number of strange effects, including loss of data in subsequent
7642 header lines, and spool format errors.
7644 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7645 client host had authenticated. This control can now be exercised by an ACL
7646 for more flexibility.
7648 69. By default, callouts do not happen when testing with -bh. There is now a
7649 variant, -bhc, which does actually run the callout code, including
7650 consulting and updating the callout cache.
7652 70. Added support for saslauthd authentication, courtesy of Alexander
7655 71. If statvfs() failed on the spool or log directories while checking their
7656 size for availability, Exim confusingly gave the error "space shortage".
7657 Furthermore, in debugging mode it crashed with a floating point exception.
7658 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7659 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7660 serious problem, Exim now writes to the main and panic logs when this
7661 happens, with details of the failure. It then refuses to accept the
7662 incoming message, giving the message "spool directory problem" or "log
7663 directory problem" with a 421 code for SMTP messages.
7665 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7666 0, 1, and 2 exist, because some OS complain for execs without them (see
7667 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7668 descriptors. However, the code omitted to check that the open succeeded,
7669 causing mysterious errors if for some reason the permissions on /dev/null
7670 got screwed. Now Exim writes a message to the main and panic logs, and
7671 bombs out if it can't open /dev/null.
7673 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7674 interact so that it is all more flexible. It is supposed to remain
7675 backwards compatible. Also added extra_local_interfaces.
7677 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7678 to bomb out with an assertion failure - to the client this appears as a
7679 connection drop. This problem occurs in the part of the code that was taken
7680 from the Samba project. Fortunately, the assertion is in a very simple
7681 function, so I have fixed this by reproducing the function inline in the
7682 one place where it is called, and arranging for authentication to fail
7683 instead of killing the process with assert().
7685 75. The SPA client code was not working when the server requested OEM rather
7686 than Unicode encoding.
7688 76. Added code to make require_files with a specific uid setting more usable in
7689 the case where statting the file as root fails - usually a non-root-mounted
7690 NFS file system. When this happens and the failure is EACCES, Exim now
7691 forks a subprocess and does the per-uid checking as the relevant uid.
7693 77. Added process_log_path.
7695 78. If log_file_path was not explicitly set, a setting of check_log_space or
7696 check_log_inodes was ignored.
7698 79. If a space check for the spool or log partitions fails, the incident is now
7699 logged. Of course, in the latter case the data may get lost...
7701 80. Added the %p formatting code to string_format() so that it can be used to
7702 print addresses in debug_print(). Adjusted all the address printing in the
7703 debugging in store.c to use %p rather than %d.
7705 81. There was a concern that a line of code in smtp_in.c could overflow a
7706 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7707 initially expressed, the concern was not well-founded, because trailing
7708 spaces are removed early. However, if the trailing spaces were followed by
7709 a NULL, they did not get removed, so the overflow was possible. Two fixes
7712 (a) I re-wrote the offending code in a cleaner fashion.
7713 (b) If an incoming SMTP command contains a NULL character, it is rejected
7716 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7717 runs initgroups(), so that if the Exim user is in any additional groups,
7718 they will be used during message reception.
7724 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob