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 the appendfile transport
91 file and directory options. Previously this was permitted.
97 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
98 side, to decode a TLS 1.3 packet capture.
100 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
101 Previously the default library behaviour applied, sending two, each in
104 JH/03 Debug output for ACL now gives the config file name and line number for
107 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
109 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
111 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
112 buffer overrun for (non-chunking) other transports.
114 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
115 TLS1.3, means that a server rejecting a client certificate is not visible
116 to the client until the first read of encrypted data (typically the
117 response to EHLO). Add detection for that case and treat it as a failed
118 TLS connection attempt, so that the normal retry-in-clear can work (if
119 suitably configured).
121 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
122 and/or domain. Found and fixed by Jason Betts.
124 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
125 configuration). If a CNAME target was not a wellformed name pattern, a
128 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
129 the OS reports them interleaved with other addresses.
131 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
132 used both for input and for a verify callout, both encrypted, SMTP
133 responses being sent by the server could be lost. This resulted in
134 dropped connections and sometimes bounces generated by a peer sending
137 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
138 string. Previously it was possible to cause undefined behaviour in a
139 library routine (usually a crash). Found by "zerons".
141 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
144 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
145 API was removed, so update to use the newer ones.
147 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
148 any timeout set, is taking a long time. Previously we would hang on to a
149 rotated logfile "forever" if the input was arriving with long gaps
150 (a previous attempt to fix addressed lack, for a long time, of initial
153 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
154 shared (NFS) environment. The length of the tempfile name is now
155 4 + 16 ("hdr.$message_exim_id") which might break on file
156 systems which restrict the file name length to lower values.
159 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
160 shared (NFS) environment.
162 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
163 did for all versions <4.90). Notably -M, -m, --invert, -I may be
166 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
167 on some platforms for bit 31.
169 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
170 to changes apparently associated with TLS1.3 handling some of the APIs
171 previously used were either nonfunctional or inappropriate. Strings
172 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
173 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
174 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
175 This affects log line X= elements, the $tls_{in,out}_cipher variables,
176 and the use of specific cipher names in the encrypted= ACL condition.
178 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
180 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
181 verification result was not updated unless hosts_require_ocsp applied.
183 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
184 queue_list_requires_admin set to false, non-admin users were denied the
187 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
188 directory-of-certs mode. Previously they were advertised despite the
191 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
192 A single TCP connection by a client will now hold a TLS connection open
193 for multiple message deliveries, by default. Previoud the default was to
196 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
197 default. If built with the facility, DANE will be used. The facility
198 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
200 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
201 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
202 must be defined and you must still, unless you define DISABLE_TLS, manage
203 the the include-dir and library-file requirements that go with that
204 choice. Non-TLS builds are still supported.
206 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
209 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
210 default. If the platform supports and has the facility enabled, it will
211 be requested on all coneections.
213 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
214 controlled by the build-time option SUPPORT_PIPE_CONNECT.
216 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
218 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
219 success-DSN messages. Previously the From: header was always the default
220 one for these; the option was ignored.
222 JH/28 Fix the timeout on smtp response to apply to the whole response.
223 Previously it was reset for every read, so a teergrubing peer sending
224 single bytes within the time limit could extend the connection for a
225 long time. Credit to Qualsys Security Advisory Team for the discovery.
227 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
228 delivery address, which leaked information of the results of local
229 forwarding. Change to the original envelope recipient address, per
232 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
233 requested. Previously not bounce was generated and a log entry of
234 error ignored was made.
236 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
238 JH/32 Introduce a general tainting mechanism for values read from the input
239 channel, and values derived from them. Refuse to expand any tainted
240 values, to catch one form of exploit.
242 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
243 was unused and the unexpanded text used for the test. Found and
244 fixed by Ruben Jenster.
246 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
247 an attempt to use a TLS library read routine dereffed a nul pointer,
250 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
251 them in our smtp response.
253 JH/36 Have the general router option retry_use_local_part default to true when
254 any of the restrictive preconditions are set (to anything). Previously it
255 was only for check_local user. The change removes one item of manual
256 configuration which is required for proper retries when a remote router
257 handles a subset of addresses for a domain.
259 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
260 link count into consideration.
262 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
263 caused the extension of big_buffer, the following lines were ignored.
265 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
266 accordance with RFC 2308. Previously there was no expiry, so a longlived
267 receive process (eg. due to ACL delays) versus a short SOA value could
270 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
272 JH/39 Promote DMARC support to mainline.
274 JH/40 Bug 2452: Add a References: header to DSNs.
276 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
277 parameters. The relevant library call is documented as "Deprecated: This
278 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
279 3.6.0, DH parameters are negotiated following RFC7919."
281 HS/06 Change the default of dnssec_request_domains to "*"
283 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
284 carried on and emitted a BDAT command, even when PIPELINING was not
287 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
288 buffer was used for the filename, resulting in a trap when tainted
289 arguments (eg. $domain) were used.
291 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
292 recommended to avoid a possible server-load attack. The feature can be
293 re-enabled via the openssl_options main cofiguration option.
295 JH/45 local_scan API: documented the current smtp_printf() call. This changed
296 for version 4.90 - adding a "more data" boolean to the arguments.
297 Bumped the ABI version number also, this having been missed previously;
298 release versions 4.90 to 4.92.3 inclusive were effectively broken in
299 respect of usage of smtp_printf() by either local_scan code or libraries
300 accessed via the ${dlfunc } expansion item. Both will need coding
301 adjustment for any calls to smtp_printf() to match the new function
302 signature; a FALSE value for the new argument is always safe.
304 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
305 the file-offset (which the Linux syscall does, and exim expects); this
306 resulted in an indefinite loop.
308 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
309 to do ARC verification. The Authentication-Results: header line added
310 by the configuration then had no ARC item.
316 JH/01 Remove code calling the customisable local_scan function, unless a new
317 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
319 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
320 non-signal-safe functions being used.
322 JH/03 Bug 2269: When presented with a received message having a stupidly large
323 number of DKIM-Signature headers, disable DKIM verification to avoid
324 a resource-consumption attack. The limit is set at twenty.
326 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
327 report of oldest_pass in ${authres } in consequence, and separate out
328 some descriptions of reasons for verification fail.
330 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
331 files in the spool were present and unlocked. A queue-runner could spot
332 them, resulting in a duplicate delivery. Fix that by doing the unlock
333 after the unlink. Investigation by Tim Stewart. Take the opportunity to
334 add more error-checking on spoolfile handling while that code is being
337 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
338 No known attacks, no CVE, this is defensive hardening.
340 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
341 a queue-runner could start a delivery while other operations were ongoing.
342 Cutthrough delivery was a common victim, resulting in duplicate delivery.
343 Found and investigated by Tim Stewart. Fix by using the open message data
344 file handle rather than opening another, and not locally closing it (which
345 releases a lock) for that case, while creating the temporary .eml format
346 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
348 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
349 $sender_verify_failure/$recipient_verify_failure to "random".
351 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
354 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
355 Previously this would segfault.
357 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
360 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
361 like zero, since the resolver should be doing this for us, But we need one
362 as a CNAME but no MX presence gets the CNAME returned; we need to check
363 that doesn't point to an MX to declare it "no MX returned" rather than
364 "error, loop". A new main option is added so the older capability of
365 following some limited number of chain links is maintained.
367 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
369 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
370 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
371 now-deprecated earlier definitions used only specified the range up to TLS
372 1.2 (in the older-version library docs).
374 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
376 JH/15 Rework TLS client-side context management. Stop using a global, and
377 explicitly pass a context around. This enables future use of TLS for
378 connections to service-daemons (eg. malware scanning) while a client smtp
379 connection is using TLS; with cutthrough connections this is quite likely.
381 JH/16 Fix ARC verification to do AS checks in reverse order.
383 JH/17 Support a "tls" option on the ${readsocket } expansion item.
385 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
386 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
387 Previously the "utf8" would be re-prepended for every additional message.
389 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
390 Previously thery were accepted, resulting in issues when attempting to
391 forward messages to a non-supporting MTA.
393 PP/02 Let -n work with printing macros too, not just options.
395 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
396 one parent address was copied, and bogus data was used at delivery-logging
397 time. Either a crash (after delivery) or bogus log data could result.
398 Discovery and analysis by Tim Stewart.
400 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
401 Previously if the string ended mid-character, we did not insert the
402 promised '?' replacement.
404 PP/04 Documentation: current string operators work on bytes, not codepoints.
406 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
407 should pack well giving a smaller memory footprint so better caching and
408 therefore performance. Group the declarations where this can't be done so
409 that the byte-sized flag variables are not interspersed among pointer
410 variables, giving a better chance of good packing by the compiler.
412 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
413 non-null, to avoid issues with sites running BATV. Previously reports were
414 sent with an empty envelope sender so looked like bounces.
416 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
417 The ignore_error flag wasn't being returned from the filter subprocess so
418 was not set for later routers. Investigation and fix by Matthias Kurz.
420 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
421 and a msg:complete for the whole, when a message is manually removed using
422 -Mrm. Developement by Matthias Kurz, hacked on by JH.
424 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
425 a "Gnu special" function, asprintf() in the DB utility binary builds; I
426 hope that is portable enough.
428 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
429 requiring a known-CA anchor certificate; make it now rely entirely on the
430 TLSA as an anchor. Checking the name on the leaf cert against the name
431 on the A-record for the host is still done for TA (but not for EE mode).
433 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
434 included in delivery lines for non-proxied connections, when compiled with
435 SUPPORT_SOCKS and running with proxy logging enabled.
437 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
438 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
439 move the existing event to fire before the normal logging of message
440 failure so that custom logging is bracketed by normal logging.
442 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
443 msg:fail:internal event. Developement by Matthias Kurz.
445 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
446 far too small for todays use of crypto signatures stored there. Go all
447 the way to the max DNS message size of 64kB, even though this might be
448 overmuch for IOT constrained device use.
450 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
451 copy a string over itself. The library routine is documented as not
452 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
454 JH/32 For main options check_spool_space and check_inode_space, where the
455 platform supports 64b integers, support more than the previous 2^31 kB
456 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
457 the previous G, M, k.
459 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
460 $authenticated_fail_id variable on authentication failure. Previously
463 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
464 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
465 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
466 GNUTLS_SEC_PARAM_MEDIUM.
468 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
469 side. Previously we would continue as if no SNI had been received.
471 JH/36 Harden the handling of string-lists. When a list consisted of a sole
472 "<" character, which should be a list-separator specification, we walked
473 off past the nul-terimation.
475 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
476 causes) even when the retry time is not yet met. Previously they were
477 not, meaning that when (say) an account was over-quota and temp-rejecting,
478 and multiple senders' messages were queued, only one sender would get
479 notified on each configured delay_warning cycle.
481 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
483 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
484 cipher-suites, an error can be left on the stack even for a succeeding
485 accept; this results in impossible error messages when a later operation
488 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
489 return error codes indicating retry. Under TLS1.3 this becomes required.
491 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
492 it only wrote the new authenticators, resulting in a lack of tracking of
493 peer changes of ESMTP extensions until the next cache flush.
495 JH/41 Fix the loop reading a message header line to check for integer overflow,
496 and more-often against header_maxsize. Previously a crafted message could
497 induce a crash of the recive process; now the message is cleanly rejected.
499 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
500 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
506 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
507 When redis_servers is set to a list of > 1 element, and the Redis servers
508 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
509 case of MOVED into a DEFER case instead, thus moving the query onto the
510 next server in the list. For a cluster of N elements, all N servers must
511 be defined in redis_servers.
513 GF/02 Catch and remove uninitialized value warning in exiqsumm
514 Check for existence of @ARGV before looking at $ARGV[0]
516 JH/01 Replace the store_release() internal interface with store_newblock(),
517 which internalises the check required to safely use the old one, plus
518 the allocate and data copy operations duplicated in both (!) of the
519 extant use locations.
521 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
522 modifier. This matches the restriction on the commandline.
524 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
525 Previously only the last row was returned.
527 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
528 we assumed that tags in the header were well-formed, and parsed the
529 element content after inspecting only the first char of the tag.
530 Assumptions at that stage could crash the receive process on malformed
533 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
534 While running the DKIM ACL we operate on the Permanent memory pool so that
535 variables created with "set" persist to the DATA ACL. Also (at any time)
536 DNS lookups that fail create cache records using the Permanent pool. But
537 expansions release any allocations made on the current pool - so a dnsdb
538 lookup expansion done in the DKIM ACL releases the memory used for the
539 DNS negative-cache, and bad things result. Solution is to switch to the
540 Main pool for expansions.
541 While we're in that code, add checks on the DNS cache during store_reset,
542 active in the testsuite.
543 Problem spotted, and debugging aided, by Wolfgang Breyha.
545 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
546 When none of the hosts presented to a transport match an already-open
547 connection, close it and proceed with the list. Previously we would
548 queue the message. Spotted by Lena with Yahoo, probably involving
551 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
552 Previously a spurious "250 OK id=" response was appended to the proper
555 JH/08 The "support for" informational output now, which built with Content
556 Scanning support, has a line for the malware scanner interfaces compiled
557 in. Interface can be individually included or not at build time.
559 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
560 by the template makefile "src/EDITME". The "STREAM" support for an older
561 ClamAV interface method is removed.
563 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
564 rows affected is given instead).
566 JH/11 The runtime Berkeley DB library version is now additionally output by
567 "exim -d -bV". Previously only the compile-time version was shown.
569 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
570 SMTP connection. Previously, when one had more receipients than the
571 first, an abortive onward connection was made. Move to full support for
572 multiple onward connections in sequence, handling cutthrough connection
573 for all multi-message initiating connections.
575 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
576 routers. Previously, a multi-recipient message would fail to match the
577 onward-connection opened for the first recipient, and cause its closure.
579 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
580 a timeout on read on a GnuTLS initiating connection, resulting in the
581 initiating connection being dropped. This mattered most when the callout
582 was marked defer_ok. Fix to keep the two timeout-detection methods
585 JH/15 Relax results from ACL control request to enable cutthrough, in
586 unsupported situations, from error to silently (except under debug)
587 ignoring. This covers use with PRDR, frozen messages, queue-only and
590 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
592 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
593 metadata, resulting in a crash in free().
595 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
596 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
597 Broken also in d185889f4, with init system revamp.
599 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
600 Previously we abruptly closed the connection after reading a malware-
601 found indication; now we go on to read the "scan ok" response line,
604 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
605 ACL. Previously, a crash would result.
607 JH/19 Speed up macro lookups during configuration file read, by skipping non-
608 macro text after a replacement (previously it was only once per line) and
609 by skipping builtin macros when searching for an uppercase lead character.
611 JH/20 DANE support moved from Experimental to mainline. The Makefile control
612 for the build is renamed.
614 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
615 was allocated for every new TLS startup, meaning one per message. Fix
616 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
618 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
619 reported the original. Fix to report (as far as possible) the ACL
620 result replacing the original.
622 JH/23 Fix memory leak during multi-message connections using STARTTLS under
623 OpenSSL. Certificate information is loaded for every new TLS startup,
624 and the resources needed to be freed.
626 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
628 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
631 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
632 DATA response info to the (existing) per-recipient response info for
633 the "C=" log element. It can have useful tracking info from the
634 destination system. Patch from Simon Arlott.
636 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
637 length value. Previously this would segfault.
639 HS/02 Support Avast multiline protoocol, this allows passing flags to
640 newer versions of the scanner.
642 JH/28 Ensure that variables possibly set during message acceptance are marked
643 dead before release of memory in the daemon loop. This stops complaints
644 about them when the debug_store option is enabled. Discovered specifically
645 for sender_rate_period, but applies to a whole set of variables.
646 Do the same for the queue-runner and queue-list loops, for variables set
647 from spool message files. Do the same for the SMTP per-message loop, for
648 certain variables indirectly set in ACL operations.
650 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
651 as a multi-recipient message from a mailinglist manager). The coding had
652 an arbitrary cutoff number of characters while checking for more input;
653 enforced by writing a NUL into the buffer. This corrupted long / fast
654 input. The problem was exposed more widely when more pipelineing of SMTP
655 responses was introduced, and one Exim system was feeding another.
656 The symptom is log complaints of SMTP syntax error (NUL chars) on the
657 receiving system, and refused recipients seen by the sending system
658 (propating to people being dropped from mailing lists).
659 Discovered and pinpointed by David Carter.
661 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
662 replaced by the ${authresults } expansion.
664 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
666 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
667 allows proper process termination in container environments.
669 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
670 Previously the "final dot" had a newline after it; ensure it is CR,LF.
672 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
673 and "err_perm", deprecated since 4.83 when the RFC-defined words
674 "temperror" and "permerror" were introduced.
676 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
677 transport-filters or DKIM-signing. The restriction was lost in the
678 consolidation of verify-callout and delivery SMTP handling.
679 Extend the restriction to also cover ARC-signing.
681 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
682 in defer=pass mode supply a 450 to the initiator. Previously the message
685 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
686 tls_require_ciphers is used as before.
688 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
689 "pass_unscanned". Only tmpfails from the scanner are written to
690 the paniclog, as they may require admin intervention (permission
691 denied, license issues). Other scanner errors (like decompression
692 bombs) do not cause a paniclog entry.
694 JH/36 Fix reinitialisation of DKIM logging variable between messages.
695 Previously it was possible to log spurious information in receive log
698 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
699 triggered odd behaviour from Outlook Express clients.
701 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
704 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
705 since the IETF WG has not yet settled on that versus the original
706 "bare" representation.
708 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
709 Previously the millisecond value corrupted the output.
710 Fix also for syslog_pid=no and log_selector +pid, for which the pid
711 corrupted the output.
717 JH/01 Rework error string handling in TLS interface so that the caller in
718 more cases is responsible for logging. This permits library-sourced
719 string to be attached to addresses during delivery, and collapses
720 pairs of long lines into single ones.
722 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
723 during configuration. Wildcards are allowed and expanded.
725 JH/02 Rework error string handling in DKIM to pass more info back to callers.
726 This permits better logging.
728 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
729 do not close it down and have the child transport start it up again on
730 the passed-on TCP connection. Instead, proxy the child (and any
731 subsequent ones) for TLS via a unix-domain socket channel. Logging is
732 affected: the continued delivery log lines do not have any DNSSEC, TLS
733 Certificate or OCSP information. TLS cipher information is still logged.
735 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
736 identical IP addresses on different listening ports. Will also affect
739 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
740 add noisy ifdef guards to special-case this sillyness.
741 Patch from Bernd Kuhls.
743 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
744 than 255 are no longer allowed.
746 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
747 Disable the session-cache too, which might reduce our load. Since we
748 currrectly use a new context for every connection, both as server and
749 client, there is no benefit for these.
750 GnuTLS appears to not support tickets server-side by default (we don't
751 call gnutls_session_ticket_enable_server()) but client side is enabled
752 by default on recent versions (3.1.3 +) unless the PFS priority string
755 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
756 <https://reproducible-builds.org/specs/source-date-epoch/>.
758 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
759 the check for any unsuccessful recipients did not notice the limit, and
760 erroneously found still-pending ones.
762 JH/08 Pipeline CHUNKING command and data together, on kernels that support
763 MSG_MORE. Only in-clear (not on TLS connections).
765 JH/09 Avoid using a temporary file during transport using dkim. Unless a
766 transport-filter is involved we can buffer the headers in memory for
767 creating the signature, and read the spool data file once for the
768 signature and again for transmission.
770 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
771 4.77 as the kernel support then wasn't solid, having issues in 64bit
772 mode. Now, it's been long enough. Add support for FreeBSD also.
774 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
775 case where the routing stage had gathered several addresses to send to
776 a host before calling the transport for the first, we previously failed
777 to close down TLS in the old transport process before passing the TCP
778 connection to the new process. The new one sent a STARTTLS command
779 which naturally failed, giving a failed delivery and bloating the retry
780 database. Investigation and fix prototype from Wolfgang Breyha.
782 JH/12 Fix check on SMTP command input synchronisation. Previously there were
783 false-negatives in the check that the sender had not preempted a response
784 or prompt from Exim (running as a server), due to that code's lack of
785 awareness of the SMTP input buffering.
787 PP/04 Add commandline_checks_require_admin option.
788 Exim drops privileges sanely, various checks such as -be aren't a
789 security problem, as long as you trust local users with access to their
790 own account. When invoked by services which pass untrusted data to
791 Exim, this might be an issue. Set this option in main configuration
792 AND make fixes to the calling application, such as using `--` to stop
795 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
796 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
797 responses to those, into a single TLS record each way (this usually means
798 a single packet). As a side issue, smtp_enforce_sync now works on TLS
801 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
802 affects you only if you're dancing at the edge of the param size limits.
803 If you are, and this message makes sense to you, then: raise the
804 configured limit or use OpenSSL 1.1. Nothing we can do for older
807 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
808 cmdline element to get the documented default one. Previously it was
811 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
812 are unsuable for non-message-specific reasons - eg. connection timeout,
813 banner-time rejection.
815 JH/16 Fix logging of delivery remote port, when specified by router, under
818 PP/06 Repair manualroute's ability to take options in any order, even if one
819 is the name of a transport.
822 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
824 JH/17 Change the list-building routines interface to use the expanding-string
825 triplet model, for better allocation and copying behaviour.
827 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
828 Previously it was constructed the first time a possibly-matching string
829 was met in the configuration file input during startup; now it is done
832 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
833 compatible one, to avoid the (poorly documented) possibility of a config
834 file in the working directory redirecting the DB files, possibly correpting
835 some existing file. CVE-2017-10140 assigned for BDB.
837 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
838 cache-hot. Previously, although the result was properly cached, the
839 initial verify call returned a defer.
841 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
842 the main verify for receipient in uncached-mode.
844 JH/22 Retire historical build files to an "unsupported" subdir. These are
845 defined as "ones for which we have no current evidence of testing".
847 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
848 if present. Previously it was ignored.
850 JH/24 Start using specified-initialisers in C structure init coding. This is
851 a C99 feature (it's 2017, so now considered safe).
853 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
854 if was a fixed-sized field and bitmask ops via macros; it is now more
857 PP/07 GitHub PR 56: Apply MariaDB build fix.
858 Patch provided by Jaroslav Škarvada.
860 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
861 during Coverity cleanups [4.87 JH/47]
862 Diagnosis and fix provided by Michael Fischer v. Mollard.
864 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
865 the right size to place the terminating semicolon on its own folded
866 line, the header hash was calculated to an incorrect value thanks to
867 the (relaxed) space the fold became.
869 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
870 and confused the parent.
872 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
873 which could crash as a result. This could lead to undeliverable messages.
875 JH/28 Logging: "next input sent too soon" now shows where input was truncated
878 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
879 matters on fast-turnover and PID-randomising systems, which were getting
880 out-of-order delivery.
882 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
883 a possibly-overlapping copy. The symptom was that "Remote host closed
884 connection in response to HELO" was logged instead of the actual 4xx
887 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
888 Previously only that bufferd was discarded, resulting in SYMTP command
891 JH/32 DKIM: when a message has multiple signatures matching an identity given
892 in dkim_verify_signers, run the dkim acl once for each. Previously only
893 one run was done. Bug 2189.
895 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
896 "panic the current process" to "deliberately defer". The panic log is
897 still written with the problem list name; the mail and reject logs now
898 get a temp-reject line for the message that was being handled, saying
899 something like "domains check lookup or other defer". The SMTP 451
900 message is still "Temporary local problem".
902 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
903 A crafted sequence of BDAT commands could result in in-use memory beeing
904 freed. CVE-2017-16943.
906 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
907 from SMTP input. Previously it was always done; now only done for DATA
908 and not BDAT commands. CVE-2017-16944.
910 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
911 to the message (such as an overlong header line). Previously this was
912 not done and we did not exit BDAT mode. Followon from the previous item
913 though a different problem.
919 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
920 than -2003 did; needs libidn2 in addition to libidn.
922 JH/02 The path option on a pipe transport is now expanded before use.
924 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
925 Patch provided by "Björn", documentation fix added too.
927 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
928 missing a wire-to-host endian conversion.
930 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
931 close after a BDAT command line could be taken as a following command,
932 giving a synch failure. Fix by only checking for synch immediately
933 before acknowledging the chunk.
935 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
936 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
937 macro. Patches provided by Josh Soref.
939 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
940 Previously we did not; the RFC seems ambiguous and VRFY is not listed
941 by IANA as a service extension. However, John Klensin suggests that we
944 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
945 the dkim code may be unix-mode line endings rather than smtp wire-format
946 CRLF, so prepend a CR to any bare LF.
948 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
949 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
951 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
952 the first were themselves being wrongly included in the feed into dkim
953 processing; with most chunk sizes in use this resulted in an incorrect
954 body hash calculated value.
956 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
957 DKIM signature block, for verification. Although advised against by
958 standards it is specifically not ruled illegal.
960 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
962 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
963 missing a body hash (the bh= tag).
965 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
966 It seems that HAProxy sends the Proxy Protocol information in clear and
967 only then does a TLS startup, so do the same.
969 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
970 TCP connections (such as for Spamd) unless the daemon successfully set
971 Fast Open mode on its listening sockets. This fixes breakage seen on
972 too-old kernels or those not configured for Fast Open, at the cost of
973 requiring both directions being enabled for TFO, and TFO never being used
974 by non-daemon-related Exim processes.
976 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
977 endings, at least on the first header line. Try to canonify any that get
978 past that check, despite the cost.
980 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
981 now limited to an arbitrary five deep, while parsing addresses with the
982 strip_excess_angle_brackets option enabled.
984 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
985 instead leave the unprompted TLS handshake in socket buffer for the
986 TLS library to consume.
988 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
990 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
992 JH/16 Drop variables when they go out of scope. Memory management drops a whole
993 region in one operation, for speed, and this leaves assigned pointers
994 dangling. Add checks run only under the testsuite which checks all
995 variables at a store-reset and panics on a dangling pointer; add code
996 explicitly nulling out all the variables discovered. Fixes one known
997 bug: a transport crash, where a dangling pointer for $sending_ip_address
998 originally assigned in a verify callout, is re-used.
1000 PP/06 Drop '.' from @INC in various Perl scripts.
1002 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1004 PP/08 Reduce a number of compilation warnings under clang; building with
1005 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1006 should be warning-free.
1008 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1010 HS/01 Fix portability problems introduced by PP/08 for platforms where
1011 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1013 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1014 chunk. This allows us to accept broken chunked messages. We need a more
1015 general solution here.
1017 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1018 already-broken messages in the queue.
1020 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1022 JH/19 Fix reference counting bug in routing-generated-address tracking.
1028 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1029 supports it and a size is available (ie. the sending peer gave us one).
1031 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1032 years of being deprecated). The replacements are the ACLs
1033 acl_smtp_mime and acl_not_smtp_mime.
1035 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1036 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1037 or even an in-clear connection were permitted. Now, if the host lookup
1038 was dnssec and dane was requested then the host is only used if the
1039 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1040 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1041 if one fails this test.
1042 This means that a poorly-configured remote DNS will make it incommunicado;
1043 but it protects against a DNS-interception attack on it.
1045 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1046 non-noisy when a race steals the message being considered.
1048 JH/05 If main configuration option tls_certificate is unset, generate a
1049 self-signed certificate for inbound TLS connections.
1051 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1052 in rewrites and routers.
1054 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1055 and logged a warning sing 4.83; now they are a configuration file error.
1057 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1058 (lacking @domain). Apply the same qualification processing as RCPT.
1060 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1062 JH/10 Support ${sha256:} applied to a string (as well as the previous
1065 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1066 a cutthrough deliver is pending, as we always want to make a connection.
1067 This also avoids re-routing the message when later placing the cutthrough
1068 connection after a verify cache hit.
1069 Do not update it with the verify result either.
1071 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1072 when routing results in more than one destination address.
1074 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1075 signing (which inhibits the cutthrough capability). Previously only
1076 the presence of an option was tested; now an expansion evaluating as
1077 empty is permissible (obviously it should depend only on data available
1078 when the cutthrough connection is made).
1080 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1081 the relevant preceding SMTP command did not note the pipelining mode.
1083 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1084 Previously they were not counted.
1086 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1087 as one having no matching records. Previously we deferred the message
1088 that needed the lookup.
1090 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1091 distinguished as "(=".
1093 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1094 for missing MX records. Previously it only worked for missing A records.
1096 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1098 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1099 after the data-go-ahead and data-ack. Patch from Jason Betts.
1101 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1102 even for a "none" policy. Patch from Tony Meyer.
1104 JH/22 Fix continued use of a connection for further deliveries. If a port was
1105 specified by a router, it must also match for the delivery to be
1108 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1109 When one of the recipients of a message was unsuitable for the connection
1110 (has no matching addresses), we lost track of needing to mark it
1111 deferred. As a result mail would be lost.
1113 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1115 JH/25 Decoding ACL controls is now done using a binary search; the source code
1116 takes up less space and should be simpler to maintain. Merge the ACL
1117 condition decode tables also, with similar effect.
1119 JH/26 Fix problem with one_time used on a redirect router which returned the
1120 parent address unchanged. A retry would see the parent address marked as
1121 delivered, so not attempt the (identical) child. As a result mail would
1124 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1125 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1126 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1129 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1130 Main config options check_{log,spool}_{inodes,space} are now
1131 100 inodes, 10MB unless set otherwise in the configuration.
1133 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1134 Previously it only applied to the main-section connection policy
1137 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1139 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1140 by me. Added RFC7919 DH primes as an alternative.
1142 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1143 are not in the system include path.
1145 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1146 GnuTLS, when a session startup failed (eg because the client disconnected)
1147 Exim did stdio operations after fclose. This was exposed by a recent
1148 change which nulled out the file handle after the fclose.
1150 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1151 signed directly by the cert-signing cert, rather than an intermediate
1152 OCSP-signing cert. This is the model used by LetsEncrypt.
1154 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1156 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1157 an incoming connection.
1159 HS/02 Bug 1802: Do not half-close the connection after sending a request
1162 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1163 fallback to "prime256v1".
1165 JH/34 SECURITY: Use proper copy of DATA command in error message.
1166 Could leak key material. Remotely exploitable. CVE-2016-9963.
1172 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1173 and 3.4.4 - once the server is enabled to respond to an OCSP request
1174 it does even when not requested, resulting in a stapling non-aware
1175 client dropping the TLS connection.
1177 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1178 support variable-length bit vectors. No functional change.
1180 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1181 The I= interface field on outgoing lines is now after the H= remote
1182 host field, same as incoming lines. There is a separate
1183 outgoing_interface log selector which allows you to disable the
1186 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1187 If not running log_selector +smtp_connection the mainlog would be held
1188 open indefinitely after a "too many connections" event, including to a
1189 deleted file after a log rotate. Leave the per net connection logging
1190 leaving it open for efficiency as that will be quickly detected by the
1191 check on the next write.
1193 HS/01 Bug 1671: Fix post transport crash.
1194 Processing the wait-<transport> messages could crash the delivery
1195 process if the message IDs didn't exist for some reason. When
1196 using 'split_spool_directory=yes' the construction of the spool
1197 file name failed already, exposing the same netto behaviour.
1199 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1200 mime_regex ACL conditions.
1202 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1203 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1204 to HELO, local diagnostic string.
1206 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1207 log line to debug. Even when configured with a tls authenticator many
1208 client connections are expected to not authenticate in this way, so
1209 an authenticate fail is not an error.
1211 HS/02 Add the Exim version string to the process info. This way exiwhat
1212 gives some more detail about the running daemon.
1214 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1215 matter for fast-change records such as DNSBLs.
1217 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1218 retry record, even if constant. There may be multiple transports with
1219 different interface settings and the retry behaviour needs to be kept
1222 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1224 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1226 JH/10 Bug 840: fix log_defer_output option of pipe transport
1228 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1229 hosts_randomize. This matters a lot when combined with mua_wrapper.
1231 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1232 ${quote_pgsql:<string>} operator.
1234 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1236 JH/14 Change header file name for freeradius-client. Relevant if compiling
1237 with Radius support; from the Gentoo tree and checked under Fedora.
1239 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1241 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1242 option transport_filter, meaning no filtering.
1244 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1246 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1247 defaults to "*" (all hosts). The variable is now available when not built
1248 with TLS, default unset, mainly to enable keeping the testsuite sane.
1249 If a server certificate is not supplied (via tls_certificate) an error is
1250 logged, and clients will find TLS connections fail on startup. Presumably
1251 they will retry in-clear.
1252 Packagers of Exim are strongly encouraged to create a server certificate
1253 at installation time.
1255 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1256 with the $config_file variable.
1258 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1259 in transport context, after the attempt, and per-recipient. The latter type
1260 is per host attempted. The event data is the error message, and the errno
1261 information encodes the lookup type (A vs. MX) used for the (first) host,
1262 and the trailing two digits of the smtp 4xx response.
1264 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1265 to write to mainlog (or rejectlog, paniclog) in the window between file
1266 creation and permissions/ownership being changed. Particularly affects
1267 installations where exicyclog is run as root, rather than exim user;
1268 result is that the running daemon panics and dies.
1270 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1272 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1273 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1274 "pri" and "weight". Note that the previous implicit priority given by the
1275 list order is no longer honoured.
1277 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1278 for DKIM processing.
1280 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1281 by defining SUPPORT_SOCKS.
1283 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1284 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1285 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1286 variables are renamed to proxy_{local,external}_{address,port}.
1288 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1289 for a build by defining SUPPORT_I18N
1291 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1292 of the query string, and make ${quote_redis:} do that quoting.
1294 JH/29 Move Events support from Experimental to mainline, enabled by default
1295 and removable for a build by defining DISABLE_EVENT.
1297 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1299 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1300 cached by the daemon.
1302 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1303 by defining LOOKUP_REDIS. The libhiredis library is required.
1305 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1306 keys are given for lookup.
1308 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1309 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1310 only supported when built with TLS support. The PolarSSL SHA routines
1311 are still used when the TLS library is too old for convenient support.
1313 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1314 openssl_options), for security. OpenSSL forces this from version 1.1.0
1315 server-side so match that on older versions.
1317 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1318 allocation for $value could be released as the expansion processing
1319 concluded, but leaving the global pointer active for it.
1321 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1322 and to use the domains and local_parts ACL conditions.
1324 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1325 incorrectly not doubled on cutthrough transmission, hence seen as a
1326 body-termination at the receiving system - resulting in truncated mails.
1327 Commonly the sender saw a TCP-level error, and retransmitted the message
1328 via the normal store-and-forward channel. This could result in duplicates
1329 received - but deduplicating mailstores were liable to retain only the
1330 initial truncated version.
1332 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1334 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1336 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1337 we're in there, support oversigning also; bug 1309.
1339 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1341 HS/04 Add support for keep_environment and add_environment options.
1343 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1344 either intentional arithmetic overflow during PRNG, or testing config-
1347 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1348 delivery resulted in actual delivery. Cancel cutthrough before DATA
1351 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1352 rejects a recipient: pass the reject to the originator.
1354 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1355 Many were false-positives and ignorable, but it's worth fixing the
1358 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1359 for the new environment-manipulation done at startup. Move the routines
1360 from being local to tls.c to being global via the os.c file.
1362 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1363 an extract embedded as result-arg for a map, the first arg for extract
1364 is unavailable so we cannot tell if this is a numbered or keyed
1365 extraction. Accept either.
1371 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1374 JH/02 The smtp transport option "multi_domain" is now expanded.
1376 JH/03 The smtp transport now requests PRDR by default, if the server offers
1379 JH/04 Certificate name checking on server certificates, when exim is a client,
1380 is now done by default. The transport option tls_verify_cert_hostnames
1381 can be used to disable this per-host. The build option
1382 EXPERIMENTAL_CERTNAMES is withdrawn.
1384 JH/05 The value of the tls_verify_certificates smtp transport and main options
1385 default to the word "system" to access the system default CA bundle.
1386 For GnuTLS, only version 3.0.20 or later.
1388 JH/06 Verification of the server certificate for a TLS connection is now tried
1389 (but not required) by default. The verification status is now logged by
1390 default, for both outbound TLS and client-certificate supplying inbound
1393 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1396 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1397 Status Notification (bounce) messages are now MIME format per RFC 3464.
1398 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1399 under the control of the dsn_advertise_hosts option, and routers may
1400 have a dsn_lasthop option.
1402 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1403 default, modifiable by a malware= option. The list separator for
1404 the options can now be changed in the usual way. Bug 68.
1406 JH/10 The smtp_receive_timeout main option is now expanded before use.
1408 JH/11 The incoming_interface log option now also enables logging of the
1409 local interface on delivery outgoing connections.
1411 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1412 if the interface and destination host and port all match.
1414 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1417 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1418 Patch from Andrew Lewis.
1420 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1421 now supports optional time-restrictions, weighting, and priority
1422 modifiers per server. Patch originally by <rommer@active.by>.
1424 JH/16 The spamd_address main option now supports a mixed list of local
1425 and remote servers. Remote servers can be IPv6 addresses, and
1426 specify a port-range.
1428 JH/17 Bug 68: The spamd_address main option now supports an optional
1429 timeout value per server.
1431 JH/18 Bug 1581: Router and transport options headers_add/remove can
1432 now have the list separator specified.
1434 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1437 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1440 JH/21 Support for the A6 type of dns record is withdrawn.
1442 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1443 rather than the verbs used.
1445 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1446 from 255 to 1024 chars.
1448 JH/24 Verification callouts now attempt to use TLS by default.
1450 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1451 are generic router options now. The defaults didn't change.
1453 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1454 Original patch from Alexander Shikoff, worked over by JH.
1456 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1457 files if ZCAT_COMMAND is not executable.
1459 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1461 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1463 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1464 Normally benign, it bites when the pair was led to by a CNAME;
1465 modern usage is to not canonicalize the domain to a CNAME target
1466 (and we were inconsistent anyway for A-only vs AAAA+A).
1468 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1470 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1471 when evaluating $sender_host_dnssec.
1473 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1474 $sender_helo_dnssec variable.
1476 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1478 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1480 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1482 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1483 documented as working, but never had. Support all but $spam_report.
1485 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1486 added for tls authenticator.
1488 HS/03 Add perl_taintmode main config option
1494 TL/01 When running the test suite, the README says that variables such as
1495 no_msglog_check are global and can be placed anywhere in a specific
1496 test's script, however it was observed that placement needed to be near
1497 the beginning for it to behave that way. Changed the runtest perl
1498 script to read through the entire script once to detect and set these
1499 variables, reset to the beginning of the script, and then run through
1500 the script parsing/test process like normal.
1502 TL/02 The BSD's have an arc4random API. One of the functions to induce
1503 adding randomness was arc4random_stir(), but it has been removed in
1504 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1505 function when detected.
1507 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1508 cause callback expansion.
1510 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1511 syntax errors in an expansion can be treated as a string instead of
1512 logging or causing an error, due to the internal use of bool_lax
1513 instead of bool when processing it.
1515 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1516 server certificates when making smtp deliveries.
1518 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1520 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1522 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1524 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1525 Merged patch from Sebastian Wiedenroth.
1527 JH/05 Fix results-pipe from transport process. Several recipients, combined
1528 with certificate use, exposed issues where response data items split
1529 over buffer boundaries were not parsed properly. This eventually
1530 resulted in duplicates being sent. This issue only became common enough
1531 to notice due to the introduction of connection certificate information,
1532 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1534 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1535 size buffer was used, resulting in syntax errors when an expansion
1538 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1539 version 3.3.6 or later.
1541 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1542 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1543 both become "event_action", the variables become $event_name, $event_data
1544 and $event_defer_errno. There is a new variable $verify_mode, usable in
1545 routers, transports and related events. The tls:cert event is now also
1546 raised for inbound connections, if the main configuration event_action
1549 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1550 early OCSP support, but no stapling (appears to be less than 1.0.0).
1552 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1553 server certificate names available under the smtp transport option
1554 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1557 JH/10 Time-related extraction expansions from certificates now use the main
1558 option "timezone" setting for output formatting, and are consistent
1559 between OpenSSL and GnuTLS compilations. Bug 1541.
1561 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1562 encoded parameter in the incoming message. Bug 1558.
1564 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1565 include certificate info, eximon was claiming there were spoolfile
1568 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1570 JH/14 Log delivery-related information more consistently, using the sequence
1571 "H=<name> [<ip>]" wherever possible.
1573 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1574 are problematic for Debian distribution, omit them from the release
1577 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1579 JH/16 Fix string representation of time values on 64bit time_t architectures.
1582 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1583 output list separator was used.
1588 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1589 checkers that were complaining about end of non-void function with no
1592 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1593 This was a regression introduced in 4.83 by another bugfix.
1595 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1597 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1598 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1604 TF/01 Correctly close the server side of TLS when forking for delivery.
1606 When a message was received over SMTP with TLS, Exim failed to clear up
1607 the incoming connection properly after forking off the child process to
1608 deliver the message. In some situations the subsequent outgoing
1609 delivery connection happened to have the same fd number as the incoming
1610 connection previously had. Exim would try to use TLS and fail, logging
1611 a "Bad file descriptor" error.
1613 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1614 utilities have not been installed.
1616 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1617 temporary space as the ACL may create new global variables.
1619 TL/01 LDAP support uses per connection or global context settings, depending
1620 upon the detected version of the libraries at build time.
1622 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1623 to extract and use the src ip:port in logging and expansions as if it
1624 were a direct connection from the outside internet. PPv2 support was
1625 updated based on HAProxy spec change in May 2014.
1627 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1629 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1630 Properly escape header and check for NULL return.
1632 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1635 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1637 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1638 characters in header names, implemented as a verify condition.
1639 Contributed by Michael Fischer v. Mollard.
1641 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1642 results permerror and temperror. Previous values are deprecated but
1643 still accepted. In a future release, err_perm and err_temp will be
1644 completely removed, which will be a backward incompatibility if the
1645 ACL tests for either of these two old results. Patch contributed by
1646 user bes-internal on the mailing list.
1648 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1650 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1651 selectors, in both main and reject logs.
1653 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1656 JH/07 Add malware type "sock" for talking to simple daemon.
1658 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1660 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1661 routers/transports under cutthrough routing.
1663 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1664 numbers. Touch up "bool" conditional to keep the same definition.
1666 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1668 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1670 JH/12 Expand items in router/transport headers_add or headers_remove lists
1671 individually rather than the list as a whole. Bug 1452.
1673 Required for reasonable handling of multiple headers_ options when
1674 they may be empty; requires that headers_remove items with embedded
1675 colons must have them doubled (or the list-separator changed).
1677 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1678 view the policy declared in the DMARC record. Currently, $dmarc_status
1679 is a combined value of both the record presence and the result of the
1682 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1684 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1685 dnslookup router and the smtp transport (applying to the forward
1688 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1689 of ldap servers used for a specific lookup. Patch provided by Heiko
1692 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1693 New variable $lookup_dnssec_authenticated for observability.
1695 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1696 Patch submitted by Lars Timman.
1698 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1700 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1701 Requires trusted mode and valid format message id, aborts otherwise.
1702 Patch contributed by Heiko Schlichting.
1704 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1705 certextract with support for various fields. Bug 1358.
1707 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1708 is requested by default, modifiable by smtp transport option
1711 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1712 operate on certificate variables to give certificate fingerprints
1713 Also new ${sha256:cert_variable}.
1715 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1717 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1718 Christian Aistleitner.
1720 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1722 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1723 file. Patch from Wolfgang Breyha.
1725 JH/25 Expand the coverage of the delivery $host and $host_address to
1726 client authenticators run in verify callout. Bug 1476.
1728 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1729 align with daemon_smtp_ports. Bug 72.
1731 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1732 support and error reporting did not work properly.
1734 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1735 and is readable. Patch from Andrew Colin Kissa.
1737 TL/14 Enhance documentation of ${run expansion and how it parses the
1738 commandline after expansion, particularly in the case when an
1739 unquoted variable expansion results in an empty value.
1741 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1743 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1744 by renaming away from it. Addresses GH issue 15, reported by
1747 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1749 TL/15 SECURITY: prevent double expansion in math comparison functions
1750 (can expand unsanitized data). Not remotely exploitable.
1757 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1759 PP/02 Make -n do something, by making it not do something.
1760 When combined with -bP, the name of an option is not output.
1762 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1765 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1766 $sender_host_name and config options to manage this, and basic check
1769 PP/05 DSCP support for outbound connections and control modifier for inbound.
1771 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1772 (Only plugin which currently uses this is kerberos4, which nobody should
1773 be using, but we should make it available and other future plugins might
1774 conceivably use it, even though it would break NAT; stuff *should* be
1775 using channel bindings instead).
1777 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1778 name; added for Sendmail compatibility; requires admin caller.
1779 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1780 just ignore it); requires trusted caller.
1781 Also parse but ignore: -Ac -Am -X<logfile>
1784 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1786 TL/02 Add +smtp_confirmation as a default logging option.
1788 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1789 Patch by Magnus Holmgren from 2007-02-20.
1791 TL/04 Bugzilla 1281 - Spec typo.
1792 Bugzilla 1283 - Spec typo.
1793 Bugzilla 1290 - Spec grammar fixes.
1795 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1797 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1799 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1800 mailing list by by Dmitry Isaikin.
1802 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1804 JH/02 Support "G" suffix to numbers in ${if comparisons.
1806 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1808 NM/01 Bugzilla 1197 - Spec typo
1809 Bugzilla 1196 - Spec examples corrections
1811 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1813 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1814 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1817 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1818 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1820 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1821 "acl {{name}{arg}...}", and optional args on acl condition
1824 JH/05 Permit multiple router/transport headers_add/remove lines.
1826 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1828 JH/07 Avoid using a waiting database for a single-message-only transport.
1829 Performance patch from Paul Fisher. Bugzilla 1262.
1831 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1834 JH/09 Add $headers_added variable, with content from use of ACL modifier
1835 add_header (but not yet added to the message). Bugzilla 199.
1837 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1838 Pulled from Bugzilla 817 by Wolfgang Breyha.
1840 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1842 (nb: this is the same fix as in Exim 4.80.1)
1844 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1847 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1850 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1852 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1853 advertise SMTP AUTH mechanism to us, instead of a generic
1854 protocol violation error. Also, make Exim more robust to bad
1855 data from the Dovecot auth socket.
1857 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1859 When a queue runner is handling a message, Exim first routes the
1860 recipient addresses, during which it prunes them based on the retry
1861 hints database. After that it attempts to deliver the message to
1862 any remaining recipients. It then updates the hints database using
1865 So if a recipient address works intermittently, it can get repeatedly
1866 deferred at routing time. The retry hints record remains fresh so the
1867 address never reaches the final cutoff time.
1869 This is a fairly common occurrence when a user is bumping up against
1870 their storage quota. Exim had some logic in its local delivery code
1871 to deal with this. However it did not apply to per-recipient defers
1872 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1874 This change adds a proper retry rule check during routing so that the
1875 final cutoff time is checked against the message's age. We only do
1876 this check if there is an address retry record and there is not a
1877 domain retry record; this implies that previous attempts to handle
1878 the address had the retry_use_local_parts option turned on. We use
1879 this as an approximation for the destination being like a local
1880 delivery, as in LMTP.
1882 I suspect this new check makes the old local delivery cutoff check
1883 redundant, but I have not verified this so I left the code in place.
1885 TF/02 Correct gecos expansion when From: is a prefix of the username.
1887 Test 0254 submits a message to Exim with the header
1891 When I ran the test suite under the user fanf2, Exim expanded
1892 the header to contain my full name, whereas it should have added
1893 a Resent-Sender: header. It erroneously treats any prefix of the
1894 username as equal to the username.
1896 This change corrects that bug.
1898 GF/01 DCC debug and logging tidyup
1899 Error conditions log to paniclog rather than rejectlog.
1900 Debug lines prefixed by "DCC: " to remove any ambiguity.
1902 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1904 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1905 Bug spotted by Jeremy Harris; was flawed since initial commit.
1906 Would have resulted in OCSP responses post-SNI triggering an Exim
1907 NULL dereference and crash.
1909 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1911 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1912 Bug detection, analysis and fix by Samuel Thibault.
1913 Bugzilla 1331, Debian bug #698092.
1915 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1917 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1918 Server implementation by Todd Lyons, client by JH.
1919 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1920 config variable "prdr_enable" controls whether the server
1921 advertises the facility. If the client requests PRDR a new
1922 acl_data_smtp_prdr ACL is called once for each recipient, after
1923 the body content is received and before the acl_smtp_data ACL.
1924 The client is controlled by both of: a hosts_try_prdr option
1925 on the smtp transport, and the server advertisement.
1926 Default client logging of deliveries and rejections involving
1927 PRDR are flagged with the string "PRDR".
1929 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1930 fclose(). Diagnosis by Todd Lyons.
1932 PP/17 Update configure.default to handle IPv6 localhost better.
1933 Patch by Alain Williams (plus minor tweaks).
1936 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1937 This is now consistent with GnuTLS, and is now documented: the
1938 previous undocumented portable approach to treating the option as
1939 unset was to force an expansion failure. That still works, and
1940 an empty string is now equivalent.
1942 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1943 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1944 not performing validation itself.
1946 PP/20 Added force_command boolean option to pipe transport.
1947 Patch from Nick Koston, of cPanel Inc.
1949 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1952 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1954 PP/21 Fix eximon continuous updating with timestamped log-files.
1955 Broken in a format-string cleanup in 4.80, missed when I repaired the
1956 other false fix of the same issue.
1957 Report and fix from Heiko Schlichting.
1960 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1961 Report from Prashanth Katuri.
1963 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1964 It's SecureTransport, so affects any MacOS clients which use the
1965 system-integrated TLS libraries, including email clients.
1967 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1968 using a MIME ACL for non-SMTP local injection.
1969 Report and assistance in diagnosis by Warren Baker.
1971 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1973 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1975 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1976 last id that failed so it may be referenced in subsequent ACL's.
1978 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1981 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1982 ldap library initialization, allowing self-signed CA's to be
1983 used. Also properly sets require_cert option later in code by
1984 using NULL (global ldap config) instead of ldap handle (per
1985 session). Bug diagnosis and testing by alxgomz.
1987 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1988 the src/util/ subdirectory.
1990 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1991 renamed to Transport Post Delivery Action by Jeremy Harris, as
1994 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1995 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1996 redis_servers = needs to be configured which will be used by the redis
1997 lookup. Patch from Warren Baker, of The Packet Hub.
1999 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2001 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2002 hostname or reverse DNS when processing a host list. Used suggestions
2003 from multiple comments on this bug.
2005 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2007 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2008 Missed a few lines, added it to make the runtest require no keyboard
2011 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2012 contains upper case chars. Make router use caseful_local_part.
2014 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2015 support when GnuTLS has been built with p11-kit.
2021 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2023 This, or similar/improved, will also be change PP/11 of 4.82.
2029 PP/01 Handle short writes when writing local log-files.
2030 In practice, only affects FreeBSD (8 onwards).
2031 Bugzilla 1053, with thanks to Dmitry Isaikin.
2033 NM/01 Bugzilla 949 - Documentation tweak
2035 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2038 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2040 PP/02 Implemented gsasl authenticator.
2042 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2044 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2045 `pkg-config foo` for cflags/libs.
2047 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2048 with rest of GSASL and with heimdal_gssapi.
2050 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2051 `pkg-config foo` for cflags/libs for the TLS implementation.
2053 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2054 properties get this fed in as external SSF. A number of robustness
2055 and debugging improvements to the cyrus_sasl authenticator.
2057 PP/08 cyrus_sasl server now expands the server_realm option.
2059 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2060 Patch by Jeremy Harris.
2062 PP/10 Added dbmjz lookup type.
2064 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2066 PP/12 MAIL args handles TAB as well as SP, for better interop with
2067 non-compliant senders.
2068 Analysis and variant patch by Todd Lyons.
2070 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2071 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2072 Patch from Dirk Mueller <dmueller@suse.com>
2074 PP/13 tls_peerdn now print-escaped for spool files.
2075 Observed some $tls_peerdn in wild which contained \n, which resulted
2076 in spool file corruption.
2078 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2079 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2080 or write after TLS renegotiation, which otherwise led to messages
2083 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2084 as a tracking header (ie: a signed header comes before the signature).
2085 Patch from Wolfgang Breyha.
2087 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2088 comma-sep list; embedded commas doubled.
2090 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2092 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2094 Report and patch from Dmitry Banschikov.
2096 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2097 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2098 failures. We appear to now support TLS1.1+ with Exim.
2100 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2101 lets Exim select keys and certificates based upon TLS SNI from client.
2102 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2103 before an outbound SMTP session. New log_selector, +tls_sni.
2105 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2106 NULL dereference. Report and patch from Alun Jones.
2108 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2109 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2110 Not seeing resolver debug output on NetBSD, but suspect this is a
2111 resolver implementation change.
2113 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2114 Left warnings. Added "eximon gdb" invocation mode.
2116 PP/21 Defaulting "accept_8bitmime" to true, not false.
2118 PP/22 Added -bw for inetd wait mode support.
2120 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2121 locate the relevant includes and libraries. Made this the default.
2123 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2124 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2126 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2127 This may cause build issues on older platforms.
2129 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2130 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2131 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2132 Added SNI support via GnuTLS too.
2133 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2135 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2137 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2138 Applied second patch from Janne, implementing suggestion to default
2139 multiple-strings-in-record handling to match SPF spec.
2141 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2143 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2144 read-only, out of scope).
2145 Patch from Wolfgang Breyha, report from Stuart Northfield.
2147 PP/29 Fix three issues highlighted by clang analyser static analysis.
2148 Only crash-plausible issue would require the Cambridge-specific
2149 iplookup router and a misconfiguration.
2150 Report from Marcin Mirosław.
2152 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2154 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2155 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2156 As part of this, removing so much warning spew let me fix some minor
2157 real issues in debug logging.
2159 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2160 assignment on my part. Fixed.
2162 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2163 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2164 Janne Snabb (who went above and beyond: thank you).
2166 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2167 string otherwise requires a connection and a bunch more work and it's
2168 relatively easy to get wrong. Should also expose TLS library linkage
2171 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2172 64-bit ${eval} (JH/03).
2174 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2175 GNU libc to support some of the 64-bit stuff, should not lead to
2176 conflicts. Defined before os.h is pulled in, so if a given platform
2177 needs to override this, it can.
2179 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2180 protection layer was required, which is not implemented.
2181 Bugzilla 1254, patch from Wolfgang Breyha.
2183 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2184 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2185 tls_dhparam take prime identifiers. Also unbreak combination of
2186 OpenSSL+DH_params+TLSSNI.
2188 PP/39 Disable SSLv2 by default in OpenSSL support.
2194 PP/01 Solaris build fix for Oracle's LDAP libraries.
2195 Bugzilla 1109, patch from Stephen Usher.
2197 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2199 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2202 TF/02 Fix a couple more cases where we did not log the error message
2203 when unlink() failed. See also change 4.74-TF/03.
2205 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2206 lock up or crash if it happened to be inside a call to libc when it
2207 got a SIGUSR1 from exiwhat.
2209 The SIGUSR1 handler appends the current process status to the process
2210 log which is later printed by exiwhat. It used to use the general
2211 purpose logging code to do this, but several functions it calls are
2212 not safe for signals.
2214 The new output code in the SIGUSR1 handler is specific to the process
2215 log, and simple enough that it's easy to inspect for signal safety.
2216 Removing some special cases also simplifies the general logging code.
2217 Removing the spurious timestamps from the process log simplifies
2220 TF/04 Improved ratelimit ACL condition.
2222 The /noupdate option has been deprecated in favour of /readonly which
2223 has clearer semantics. The /leaky, /strict, and /readonly update modes
2224 are mutually exclusive. The update mode is no longer included in the
2225 database key; it just determines when the database is updated. (This
2226 means that when you upgrade Exim will forget old rate measurements.)
2228 Exim now checks that the per_* options are used with an update mode that
2229 makes sense for the current ACL. For example, when Exim is processing a
2230 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2231 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2232 must specify per_mail/readonly. If you omit the update mode it defaults to
2233 /leaky where that makes sense (as before) or /readonly where required.
2235 The /noupdate option is now undocumented but still supported for
2236 backwards compatibility. It is equivalent to /readonly except that in
2237 ACLs where /readonly is required you may specify /leaky/noupdate or
2238 /strict/noupdate which are treated the same as /readonly.
2240 A useful new feature is the /count= option. This is a generalization
2241 of the per_byte option, so that you can measure the throughput of other
2242 aggregate values. For example, the per_byte option is now equivalent
2243 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2245 The per_rcpt option has been generalized using the /count= mechanism
2246 (though it's more complicated than the per_byte equivalence). When it is
2247 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2248 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2249 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2250 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2251 Note that using per_rcpt with a non-readonly update mode in more than
2252 one ACL will cause the recipients to be double-counted. (The per_mail
2253 and per_byte options don't have this problem.)
2255 The handling of very low rates has changed slightly. If the computed rate
2256 is less than the event's count (usually one) then this event is the first
2257 after a long gap. In this case the rate is set to the same as this event's
2258 count, so that the first message of a spam run is counted properly.
2260 The major new feature is a mechanism for counting the rate of unique
2261 events. The new per_addr option counts the number of different
2262 recipients that someone has sent messages to in the last time period. It
2263 behaves like per_rcpt if all the recipient addresses are different, but
2264 duplicate recipient addresses do not increase the measured rate. Like
2265 the /count= option this is a general mechanism, so the per_addr option
2266 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2267 example, measure the rate that a client uses different sender addresses
2268 with the options per_mail/unique=$sender_address. There are further
2269 details in the main documentation.
2271 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2273 TF/06 Removed a few PCRE remnants.
2275 TF/07 Automatically extract Exim's version number from tags in the git
2276 repository when doing development or release builds.
2278 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2279 Bugzilla 879. Patch from Paul Fisher.
2281 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2282 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2285 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2287 PP/05 Variable $av_failed, true if the AV scanner deferred.
2288 Bugzilla 1078. Patch from John Horne.
2290 PP/06 Stop make process more reliably on build failure.
2291 Bugzilla 1087. Patch from Heiko Schlittermann.
2293 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2294 Bugzilla 1089. Patch from Heiko Schlittermann.
2296 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2297 Bugzilla 1131. Patch from Holger Weiß.
2299 PP/09 Handle IPv6 addresses with SPF.
2300 Bugzilla 860. Patch from Wolfgang Breyha.
2302 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2304 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2307 PP/11 match_* no longer expand right-hand-side by default.
2308 New compile-time build option, EXPAND_LISTMATCH_RHS.
2309 New expansion conditions, "inlist", "inlisti".
2311 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2313 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2315 PP/14 fix log_write() format string regression from TF/03.
2316 Bugzilla 1152. Patch from Dmitry Isaikin.
2322 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2324 PP/02 Harmonised TLS library version reporting; only show if debugging.
2325 Layout now matches that introduced for other libraries in 4.74 PP/03.
2327 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2329 PP/04 New "dns_use_edns0" global option.
2331 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2334 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2335 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2337 TK/01 Updated PolarSSL code to 0.14.2.
2338 Bugzilla 1097. Patch from Andreas Metzler.
2340 PP/07 Catch divide-by-zero in ${eval:...}.
2341 Fixes bugzilla 1102.
2343 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2346 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2347 format-string attack -- SECURITY: remote arbitrary code execution.
2349 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2350 time unintentionally subject to list matching rules, letting the header
2351 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2352 arbitrary string expansion). This allowed for information disclosure.
2354 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2355 INT_MIN/-1 -- value coerced to INT_MAX.
2361 NM/01 Workaround for PCRE version dependency in version reporting
2364 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2365 This fixes portability to compilers other than gcc, notably
2366 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2368 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2369 makefiles for portability to HP-UX and POSIX correctness.
2371 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2372 Also via indented variable definition in the Makefile.
2373 (Debugging by Oliver Heesakkers).
2375 PP/02 Restore caching of spamd results with expanded spamd_address.
2376 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2378 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2379 Improves build reliability. Fix from: Frank Elsner
2381 NM/02 Fix wide character breakage in the rfc2047 coding
2382 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2384 NM/03 Allow underscore in dnslist lookups
2385 Fixes bug 1026. Patch from Graeme Fowler
2387 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2388 Code patches from Adam Ciarcinski of NetBSD.
2390 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2393 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2394 is logged, to avoid truncation. Patch from John Horne.
2396 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2397 Patch from Jakob Hirsch.
2399 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2400 SQL string expansion failure details.
2401 Patch from Andrey Oktyabrski.
2403 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2404 Patch from Simon Arlott.
2406 PP/09 New lookups functionality failed to compile on old gcc which rejects
2407 extern declarations in function scope.
2408 Patch from Oliver Fleischmann
2410 PP/10 Use sig_atomic_t for flags set from signal handlers.
2411 Check getgroups() return and improve debugging.
2412 Fixed developed for diagnosis in bug 927 (which turned out to be
2415 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2416 Patch from Mark Zealey.
2418 PP/12 Bugzilla 1056: Improved spamd server selection.
2419 Patch from Mark Zealey.
2421 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2422 Based on patch from Heiko Schlittermann.
2424 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2425 Patch from Uwe Doering, sign-off by Michael Haardt.
2427 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2428 variable declaration deep within a block. Bug and patch from
2431 PP/15 lookups-Makefile IRIX compatibility coercion.
2433 PP/16 Make DISABLE_DKIM build knob functional.
2435 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2436 Patch by Simon Arlott
2438 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2439 variable argument macros. Our copy now differs from upstream.
2445 TF/01 Failure to get a lock on a hints database can have serious
2446 consequences so log it to the panic log.
2448 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2449 controlled using the smtp_confirmation log selector.
2451 TF/03 Include the error message when we fail to unlink a spool file.
2453 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2454 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2455 for maintaining out-of-tree patches for some time.
2457 PP/01 Bugzilla 139: Documentation and portability issues.
2458 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2459 Handle per-OS dynamic-module compilation flags.
2461 PP/02 Let /dev/null have normal permissions.
2462 The 4.73 fixes were a little too stringent and complained about the
2463 permissions on /dev/null. Exempt it from some checks.
2464 Reported by Andreas M. Kirchwitz.
2466 PP/03 Report version information for many libraries, including
2467 Exim version information for dynamically loaded libraries. Created
2468 version.h, now support a version extension string for distributors
2469 who patch heavily. Dynamic module ABI change.
2471 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2472 privilege escalation vulnerability whereby the Exim run-time user
2473 can cause root to append content of the attacker's choosing to
2476 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2479 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2480 If dropping privileges for untrusted macros, we disabled normal logging
2481 on the basis that it would fail; for the Exim run-time user, this is not
2482 the case, and it resulted in successful deliveries going unlogged.
2483 Fixed. Reported by Andreas Metzler.
2489 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2490 only prepend for the Resent-* case. Fixes regression introduced in
2491 Exim 4.70 by NM/22 for Bugzilla 607.
2493 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2494 increasing numbers of administrators be bitten by this.
2496 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2498 PP/03 Bugzilla 994: added openssl_options main configuration option.
2500 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2502 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2504 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2506 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2507 without a peer certificate, leading to a segfault because of an
2508 assumption that peers always have certificates. Be a little more
2509 paranoid. Problem reported by Martin Tscholak.
2511 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2512 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2513 NB: ClamAV planning to remove STREAM in "middle of 2010".
2514 CL also introduces -bmalware, various -d+acl logging additions and
2515 more caution in buffer sizes.
2517 PP/09 Implemented reverse_ip expansion operator.
2519 PP/10 Bugzilla 937: provide a "debug" ACL control.
2521 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2523 PP/12 Bugzilla 973: Implement --version.
2525 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2527 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2529 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2531 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2532 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2533 ignore trailing whitespace.
2535 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2537 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2540 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2541 Notification from Dr Andrew Aitchison.
2543 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2544 ExtendedDetectionInfo response format.
2545 Notification from John Horne.
2547 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2550 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2551 XSL and documented dependency on system catalogs, with examples of how
2554 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2557 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2558 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2559 configuration file which is writeable by the Exim user or group.
2561 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2562 of configuration files to cover files specified with the -C option if
2563 they are going to be used with root privileges, not just the default
2566 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2567 option (effectively making it always true).
2569 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2570 files to be used while preserving root privileges.
2572 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2573 that rogue child processes cannot use them.
2575 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2576 run-time user, instead of root.
2578 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2579 Exim run-time user without dropping privileges.
2581 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2582 result string, instead of calling string_vformat() twice with the same
2585 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2586 for other users. Others should always drop root privileges if they use
2587 -C on the command line, even for a whitelisted configure file.
2589 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2591 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2597 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2598 $data_path, and $header_path variables; fixed documentation bugs and
2601 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2602 exipick to access non-standard spools, including the "frozen" queue
2605 NM/01 Bugzilla 965: Support mysql stored procedures.
2606 Patch from Alain Williams
2608 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2610 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2611 Patch from Andreas Metzler
2613 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2614 Patch from Kirill Miazine
2616 NM/05 Bugzilla 671: Added umask to procmail example.
2618 JJ/03 installed exipick 20100323.0, fixing doc bug
2620 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2621 directory. Notification and patch from Dan Rosenberg.
2623 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2625 TK/02 Improve log output when DKIM signing operation fails.
2627 MH/01 Treat the transport option dkim_domain as a colon separated
2628 list, not as a single string, and sign the message with each element,
2629 omitting multiple occurences of the same signer.
2631 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2632 Bugzilla 985, 986. Patch by Simon Arlott
2634 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2635 Patch by Simon Arlott
2637 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2638 MBX locking. Notification from Dan Rosenberg.
2644 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2646 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2648 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2650 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2652 NM/04 Bugzilla 915: Flag broken perl installation during build.
2658 TK/01 Added patch by Johannes Berg that expands the main option
2659 "spamd_address" if it starts with a dollar sign.
2661 TK/02 Write list of recipients to X-Envelope-Sender header when building
2662 the mbox-format spool file for content scanning (suggested by Jakob
2665 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2666 (http://www.dcc-servers.net/) support via dccifd. Activated by
2667 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2669 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2670 by Mark Daniel Reidel <mr@df.eu>.
2672 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2673 When building exim an external PCRE library is now needed -
2674 PCRE is a system library on the majority of modern systems.
2675 See entry on PCRE_LIBS in EDITME file.
2677 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2678 conversation. Added nologin parameter to request.
2679 Patch contributed by Kirill Miazine.
2681 TF/01 Do not log submission mode rewrites if they do not change the address.
2683 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2685 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2686 log files in place. Contributed by Roberto Lima.
2688 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2690 TF/03 Bugzilla 615: When checking the local_parts router precondition
2691 after a local_part_suffix or local_part_prefix option, Exim now
2692 does not use the address's named list lookup cache, since this
2693 contains cached lookups for the whole local part.
2695 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2696 Robert Millan. Documentation is in experimental-spec.txt.
2698 TF/04 Bugzilla 668: Fix parallel build (make -j).
2700 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2702 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2703 Patch provided by Jan Srzednicki.
2705 TF/05 Leading white space used to be stripped from $spam_report which
2706 wrecked the formatting. Now it is preserved.
2708 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2709 that they are available at delivery time.
2711 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2713 TF/08 TLS error reporting now respects the incoming_interface and
2714 incoming_port log selectors.
2716 TF/09 Produce a more useful error message if an SMTP transport's hosts
2717 setting expands to an empty string.
2719 NM/06 Bugzilla 744: EXPN did not work under TLS.
2720 Patch provided by Phil Pennock.
2722 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2723 Patch provided by Richard Godbee.
2725 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2726 acl_smtp_notquit, added index entry.
2728 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2729 Patch provided by Eugene Bujak.
2731 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2732 accept(). Patch provided by Maxim Dounin.
2734 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2735 Patch provided by Phil Pennock.
2737 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2739 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2740 Patch provided by Brad "anomie" Jorsch.
2742 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2743 Patch provided by Dean Brooks.
2745 TK/05 Add native DKIM support (does not depend on external libraries).
2747 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2748 Patch provided by Graeme Fowler.
2750 NM/16 Bugzilla 851: Documentation example syntax fix.
2752 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2754 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2757 NM/19 Bugzilla 745: TLS version reporting.
2758 Patch provided by Phil Pennock.
2760 NM/20 Bugzilla 167: bool: condition support.
2761 Patch provided by Phil Pennock.
2763 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2764 clients. Patch provided by Phil Pennock.
2766 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2767 Patch provided by Brad "anomie" Jorsch.
2769 NM/23 Bugzilla 687: Fix misparses in eximstats.
2770 Patch provided by Heiko Schlittermann.
2772 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2773 Patch provided by Heiko Schlittermann.
2775 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2776 plus update to original patch.
2778 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2780 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2781 Patch provided by David Brownlee.
2783 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2785 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2787 NM/30 Bugzilla 888: TLS documentation bugfixes.
2789 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2791 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2792 Unlike the original bugzilla I have changed all shell scripts in src tree.
2794 NM/33 Bugzilla 898: Transport filter timeout fix.
2795 Patch by Todd Rinaldo.
2797 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2798 Patch by Serge Demonchaux.
2800 NM/35 Bugzilla 39: Base64 decode bug fixes.
2801 Patch by Jakob Hirsch.
2803 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2805 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2807 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2809 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2815 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2816 ALT-N's libdkim that I have put here:
2817 http://duncanthrax.net/exim-experimental/
2819 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2820 were called 'true' and it seems that C99 defines that as a reserved
2821 keyword to be used with 'bool' variable types. That means you could
2822 not include C99-style headers which use bools without triggering
2823 build errors in sieve.c.
2825 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2826 as mailq or other aliases. Changed the --help handling significantly
2827 to do whats expected. exim_usage() emits usage/help information.
2829 SC/01 Added the -bylocaldomain option to eximstats.
2831 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2833 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2835 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2841 PH/01 Another patch from the Sieve maintainer.
2843 PH/02 When an IPv6 address is converted to a string for single-key lookup
2844 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2845 dots are used instead of colons so that keys in lsearch files need not
2846 contain colons. This was done some time before quoting was made available
2847 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2848 (notated using the quote facility) so as to distinguish them from IPv4
2849 keys. This meant that lookups for IP addresses in host lists did not work
2850 for iplsearch lookups.
2852 This has been fixed by arranging for IPv6 addresses to be expressed with
2853 colons if the lookup type is iplsearch. This is not incompatible, because
2854 previously such lookups could never work.
2856 The situation is now rather anomalous, since one *can* have colons in
2857 ordinary lsearch keys. However, making the change in all cases is
2858 incompatible and would probably break a number of configurations.
2860 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2863 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2864 conversion specification without a maximum field width, thereby enabling
2865 a rogue spamd server to cause a buffer overflow. While nobody in their
2866 right mind would setup Exim to query an untrusted spamd server, an
2867 attacker that gains access to a server running spamd could potentially
2868 exploit this vulnerability to run arbitrary code as the Exim user.
2870 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2871 $primary_hostname instead of what libspf2 thinks the hosts name is.
2873 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2874 a directory entry by the name of the lookup key. Previously, if a
2875 symlink pointed to a non-existing file or a file in a directory that
2876 Exim lacked permissions to read, a lookup for a key matching that
2877 symlink would fail. Now it is enough that a matching directory entry
2878 exists, symlink or not. (Bugzilla 503.)
2880 PH/03 The body_linecount and body_zerocount variables are now exported in the
2883 PH/04 Added the $dnslist_matched variable.
2885 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2886 This means they are set thereafter only if the connection becomes
2889 PH/06 Added the client_condition to authenticators so that some can be skipped
2890 by clients under certain conditions.
2892 PH/07 The error message for a badly-placed control=no_multiline_responses left
2893 "_responses" off the end of the name.
2895 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2897 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2898 (without spaces) instead of just copying the configuration text.
2900 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2902 PH/11 Added $max_received_linelength.
2904 PH/12 Added +ignore_defer and +include_defer to host lists.
2906 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2907 way in which PCRE > 7.0 is built.
2909 PH/14 Implemented queue_only_load_latch.
2911 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2912 MAIL command. The effect was to mangle the value on 64-bit systems.
2914 PH/16 Another patch from the Sieve maintainer.
2916 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2918 PH/18 If a system quota error occurred while trying to create the file for
2919 a maildir delivery, the message "Mailbox is full" was not appended to the
2920 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2921 only to a quota excession during the actual writing of the file.
2923 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2924 characters?) which causes problems in log lines. The DN values are now
2925 passed through string_printing() before being added to log lines.
2927 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2928 and InterBase are left for another time.)
2930 PH/21 Added message_body_newlines option.
2932 PH/22 Guard against possible overflow in moan_check_errorcopy().
2934 PH/23 POSIX allows open() to be a macro; guard against that.
2936 PH/24 If the recipient of an error message contained an @ in the local part
2937 (suitably quoted, of course), incorrect values were put in $domain and
2938 $local_part during the evaluation of errors_copy.
2944 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2945 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2948 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2949 issue a MAIL command.
2951 PH/02 In an ACL statement such as
2953 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2955 if a client was not listed at all, or was listed with a value other than
2956 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2957 the condition was not true (as it should be), so access was not denied.
2958 The bug was that the ! inversion was incorrectly passed on to the second
2959 item. This has been fixed.
2961 PH/03 Added additional dnslists conditions == and =& which are different from
2962 = and & when the dns lookup returns more than one IP address.
2964 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2965 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2967 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2968 FSYNC, which compiles an option called disable_fsync that allows for
2969 bypassing fsync(). The documentation is heavily laced with warnings.
2971 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2973 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2974 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2975 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2976 including adding "make clean"; (3) Added -fPIC when compiling the test
2977 dynamically loaded module, to get rid of a warning.
2979 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2980 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2981 = 0s. The bug is otherwise harmless.
2983 PH/07 There was a bug in the dovecot authenticator such that the value of
2984 $auth1 could be overwritten, and so not correctly preserved, after a
2985 successful authentication. This usually meant that the value preserved by
2986 the server_setid option was incorrect.
2988 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2990 PH/09 Installed PCRE release 7.0.
2992 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2993 run for batched SMTP input. It is now run at the start of every message
2994 in the batch. While fixing this I discovered that the process information
2995 (output by running exiwhat) was not always getting set for -bs and -bS
2996 input. This is fixed, and it now also says "batched" for BSMTP.
2998 PH/11 Added control=no_pipelining.
3000 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3001 patch, slightly modified), and move the expansion of helo_data till after
3002 the connection is made in the smtp transport (so it can use these
3005 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3007 PH/14 Added log_selector = +pid.
3009 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3011 PH/16 Add ${if forany and ${if forall.
3013 PH/17 Added dsn_from option to vary the From: line in DSNs.
3015 PH/18 Flush SMTP output before performing a callout, unless control =
3016 no_callout_flush is set.
3018 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3019 was true (the default) a successful delivery failed to delete the retry
3020 item, thus causing premature timeout of the address. The bug is now
3023 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3025 PH/21 Long custom messages for fakedefer and fakereject are now split up
3026 into multiline responses in the same way that messages for "deny" and
3027 other ACL rejections are.
3029 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3030 with slight modification.
3032 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3033 draft, changing the syntax and factoring some duplicate code".
3035 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3036 for deliveries of the second and subsequent messages over the same SMTP
3039 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3040 ${reduce, with only minor "tidies".
3042 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3044 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3045 expansion side effects.
3047 PH/27 When a message times out after an over-quota error from an Exim-imposed
3048 quota, the bounce message says "mailbox is full". This message was not
3049 being given when it was a system quota that was exceeded. It now should
3052 MH/03 Made $recipients available in local_scan(). local_scan() already has
3053 better access to the recipient list through recipients_list[], but
3054 $recipients can be useful in postmaster-provided expansion strings.
3056 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3057 in the case of a MAIL command with additional options following the
3058 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3059 were accidentally chopped off.
3061 PH/29 SMTP synchronization checks are implemented when a command is read -
3062 there is a check that no more input is waiting when there shouldn't be
3063 any. However, for some commands, a delay in an ACL can mean that it is
3064 some time before the response is written. In this time, more input might
3065 arrive, invalidly. So now there are extra checks after an ACL has run for
3066 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3067 pipelining has not been advertised.
3069 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3071 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3072 returned in the SMTP response when smtp_return_error_details was false.
3073 This has been fixed.
3075 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3076 instead of the C I/O that was originally supplied, because problems were
3077 reported on Solaris.
3079 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3080 Exim which did not show up earlier: it was assuming that a call to
3081 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3082 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3083 was a macro that became an assignment, so it seemed to work. This has
3084 changed to a proper function call with a void return, hence the compile
3085 error. Exim's code has been fixed.
3087 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3090 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3092 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3094 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3095 because it turns out to be too big or there is a timeout) there is no
3096 "Completed" line in the log. When some messages of this type were
3097 selected by exigrep, they were listed as "not completed". Others were
3098 picked up by some special patterns. I have improved the selection
3099 criteria to be more general.
3101 PH/38 The host_find_failed option in the manualroute router can now be set
3102 to "ignore", to completely ignore a host whose IP address cannot be
3103 found. If all hosts are ignored, the behaviour is controlled by the new
3104 host_all_ignored option.
3106 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3107 homing or because of multiple MX records with /mx) generated more than
3108 one IP address, and the following item turned out to be the local host,
3109 all the secondary addresses of the first item were incorrectly removed
3110 from the list, along with the local host and any following hosts (which
3111 is what is supposed to happen).
3113 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3114 whoever called Exim into the -H file. In the case of the daemon it was
3115 behaving confusingly. When first started, it used values for whoever
3116 started the daemon, but after a SIGHUP it used the Exim user (because it
3117 calls itself on a restart). I have changed the code so that it now always
3120 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3121 message are rejected with the same error (e.g. no authentication or bad
3122 sender address), and a DATA command is nevertheless sent (as can happen
3123 with PIPELINING or a stupid MUA), the error message that was given to the
3124 RCPT commands is included in the rejection of the DATA command. This is
3125 intended to be helpful for MUAs that show only the final error to their
3128 PH/42 Another patch from the Sieve maintainer.
3130 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3131 Eximstats - Fixed some broken HTML links and added missing column headers
3133 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3134 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3136 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3138 PH/43 Yet another patch from the Sieve maintainer.
3140 PH/44 I found a way to check for a TCP/IP connection going away before sending
3141 the response to the final '.' that terminates a message, but only in the
3142 case where the client has not sent further data following the '.'
3143 (unfortunately, this is allowed). However, in many cases there won't be
3144 any further data because there won't be any more messages to send. A call
3145 to select() can be used: if it shows that the input is "ready", there is
3146 either input waiting, or the socket has been closed. An attempt to read
3147 the next input character can distinguish the two cases. Previously, Exim
3148 would have sent an OK response which the client would never have see.
3149 This could lead to message repetition. This fix should cure that, at
3150 least in a lot of common cases.
3152 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3153 advertised in response to EHLO.
3159 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3160 fixed by 4.65/MH/01 (is this a record?) are fixed:
3162 (i) An empty string was always treated as zero by the numeric comparison
3163 operators. This behaviour has been restored.
3165 (ii) It is documented that the numeric comparison operators always treat
3166 their arguments as decimal numbers. This was broken in that numbers
3167 starting with 0 were being interpreted as octal.
3169 While fixing these problems I realized that there was another issue that
3170 hadn't been noticed. Values of message_size_limit (both the global option
3171 and the transport option) were treated as octal if they started with 0.
3172 The documentation was vague. These values are now always treated as
3173 decimal, and I will make that clear in the documentation.
3179 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3180 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3183 MH/01 Don't check that the operands of numeric comparison operators are
3184 integers when their expansion is in "skipping" mode (fixes bug
3185 introduced by 4.64-PH/07).
3187 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3188 child addresses, Exim now panics and dies. Previously, because the count
3189 is held in a short int, deliveries were likely to be lost. As such a
3190 large number of recipients for a single message is ridiculous
3191 (performance will be very, very poor), I have chosen to impose a limit
3192 rather than extend the field.
3198 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3199 leftover -K file (the existence of which was triggered by #402).
3200 While we were at it, introduced process PID as part of the -K
3201 filename. This should rule out race conditions when creating
3204 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3205 processing considerably. Previous code took too long for large mails,
3206 triggering a timeout which in turn triggers #401.
3208 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3209 in the DK code in transports.c. sendfile() is not really portable,
3210 hence the _LINUX specificness.
3212 TF/01 In the add_headers option to the mail command in an Exim filter,
3213 there was a bug that Exim would claim a syntax error in any
3214 header after the first one which had an odd number of characters
3217 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3218 callout verification, Exim cached a "reject" for the entire domain. This
3219 is correct for most verifications, but it is not correct for a recipient
3220 verification with use_sender or use_postmaster set, because in that case
3221 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3222 case of MAIL FROM:<> rejection from other early rejections (e.g.
3223 rejection of HELO). When verifying a recipient using a non-null MAIL
3224 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3225 Whatever the result of the callout, the value of the domain cache is
3226 left unchanged (for any other kind of callout, getting as far as trying
3227 RCPT means that the domain itself is ok).
3229 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3232 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3233 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3234 session, the daemon ignores ECONNECT errors and logs others; it now
3235 ignores EPIPE as well.
3237 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3238 (quoted-printable decoding).
3240 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3241 later the small subsequent patch to fix an introduced bug.
3243 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3245 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3247 PH/08 An error is now given if message_size_limit is specified negative.
3249 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3250 to be given (somewhat) arbitrary names.
3252 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3255 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3256 miscellaneous code fixes
3258 PH/10 Added the log_reject_target ACL modifier to specify where to log
3261 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3262 hostname. This is wrong, because it relates to the incoming message (and
3263 probably the interface on which it is arriving) and not to the outgoing
3264 callout (which could be using a different interface). This has been
3265 changed to use the value of the helo_data option from the smtp transport
3266 instead - this is what is used when a message is actually being sent. If
3267 there is no remote transport (possible with a router that sets up host
3268 addresses), $smtp_active_hostname is used.
3270 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3271 tweaks were necessary in order to get it to work (see also 21 below):
3272 (a) The code assumed that strncpy() returns a negative number on buffer
3273 overflow, which isn't the case. Replaced with Exim's string_format()
3275 (b) There were several signed/unsigned issues. I just did the minimum
3276 hacking in of casts. There is scope for a larger refactoring.
3277 (c) The code used strcasecmp() which is not a standard C function.
3278 Replaced with Exim's strcmpic() function.
3279 (d) The code set only $1; it now sets $auth1 as well.
3280 (e) A simple test gave the error "authentication client didn't specify
3281 service in request". It would seem that Dovecot has changed its
3282 interface. Fortunately there's a specification; I followed it and
3283 changed what the client sends and it appears to be working now.
3285 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3288 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3289 address A is aliased to B and C, where B exists and C does not. Without
3290 -v the output is "A verified" because verification stops after a
3291 successful redirection if more than one address is generated. However,
3292 with -v the child addresses are also verified. Exim was outputting "A
3293 failed to verify" and then showing the successful verification for C,
3294 with its parentage. It now outputs "B failed to verify", showing B's
3295 parentage before showing the successful verification of C.
3297 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3298 look up a TXT record in a specific list after matching in a combined
3301 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3302 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3303 they consult the DNS. I had assumed they would set it the way they
3304 wanted; and indeed my experiments on Linux seem to show that in some
3305 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3306 To be on the safe side, however, I have now made the interface to
3307 host_find_byname() similar to host_find_bydns(), with an argument
3308 containing the DNS resolver options. The host_find_byname() function now
3309 sets these options at its start, just as host_find_bydns() does. The smtp
3310 transport options dns_qualify_single and dns_search_parents are passed to
3311 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3312 of host_find_byname() use the default settings of RES_DEFNAMES
3313 (qualify_single) but not RES_DNSRCH (search_parents).
3315 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3316 spool_read_header() do less string testing, by means of a preliminary
3317 switch on the second character of optional "-foo" lines. (This is
3318 overdue, caused by the large number of possibilities that now exist.
3319 Originally there were few.) While I was there, I also converted the
3320 str(n)cmp tests so they don't re-test the leading "-" and the first
3321 character, in the hope this might squeeze out yet more improvement.
3323 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3324 flag allowing group syntax was set by the header_syntax check but not
3325 turned off, possible causing trouble later; (2) The flag was not being
3326 set at all for the header_verify test, causing "group"-style headers to
3327 be rejected. I have now set it in this case, and also caused header_
3328 verify to ignore an empty address taken from a group. While doing this, I
3329 came across some other cases where the code for allowing group syntax
3330 while scanning a header line wasn't quite right (mostly, not resetting
3331 the flag correctly in the right place). These bugs could have caused
3332 trouble for malformed header lines. I hope it is now all correct.
3334 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3335 with the "reply" argument non-NULL. The code, however (which originally
3336 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3337 but it didn't always do it. This confused somebody who was copying the
3338 code for some other use. I have removed all the tests.
3340 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3341 feature that was used to support insecure browsers during the U.S. crypto
3342 embargo. It requires special client support, and Exim is probably the
3343 only MTA that supported it -- and would never use it because real RSA is
3344 always available. This code has been removed, because it had the bad
3345 effect of slowing Exim down by computing (never used) parameters for the
3346 RSA_EXPORT functionality.
3348 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3349 authenticator to fail if there's a tab character in the incoming data
3350 (there should never be unless someone is messing about, as it's supposed
3351 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3352 if the connection is using TLS or if the remote IP is the same as the
3353 local IP, and the "valid-client-cert option" if a client certificate has
3356 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3357 authenticators. This can be used for authorization after authentication
3358 succeeds. (In the case of plaintext, it servers for both authentication
3361 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3362 if any retry times were supplied.
3364 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3365 connection, where there is no client IP address to check. In this
3366 situation, the verify now always succeeds.
3368 PH/25 Applied John Jetmore's -Mset patch.
3370 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3372 PH/27 In a string expansion for a processed (not raw) header when multiple
3373 headers of the same name were present, leading whitespace was being
3374 removed from all of them, but trailing whitespace was being removed only
3375 from the last one. Now trailing whitespace is removed from each header
3376 before concatenation. Completely empty headers in a concatenation (as
3377 before) are ignored.
3379 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3380 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3382 PH/29 [Removed. This was a change that I later backed out, and forgot to
3383 correct the ChangeLog entry (that I had efficiently created) before
3384 committing the later change.]
3386 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3387 address errors (4xx response to RCPT) over the same connection as other
3388 messages routed to the same hosts. Such deliveries are always "forced",
3389 so retry times are not inspected. This resulted in far too many retries
3390 for the affected addresses. The effect occurred only when there were more
3391 hosts than the hosts_max_try setting in the smtp transport when it had
3392 the 4xx errors. Those hosts that it had tried were not added to the list
3393 of hosts for which the message was waiting, so if all were tried, there
3394 was no problem. Two fixes have been applied:
3396 (i) If there are any address or message errors in an SMTP delivery, none
3397 of the hosts (tried or untried) are now added to the list of hosts
3398 for which the message is waiting, so the message should not be a
3399 candidate for sending over the same connection that was used for a
3400 successful delivery of some other message. This seems entirely
3401 reasonable: after all the message is NOT "waiting for some host".
3402 This is so "obvious" that I'm not sure why it wasn't done
3403 previously. Hope I haven't missed anything, but it can't do any
3404 harm, as the worst effect is to miss an optimization.
3406 (ii) If, despite (i), such a delivery is accidentally attempted, the
3407 routing retry time is respected, so at least it doesn't keep
3408 hammering the server.
3410 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3411 in ${readsocket because some servers need this prod.
3413 PH/32 Added some extra debug output when updating a wait-xxx database.
3415 PH/33 The hint "could be header name not terminated by colon", which has been
3416 given for certain expansion errors for a long time, was not being given
3417 for the ${if def:h_colon_omitted{... case.
3419 PH/34 The spec says: "With one important exception, whenever a domain list is
3420 being scanned, $domain contains the subject domain." There was at least
3421 one case where this was not true.
3423 PH/35 The error "getsockname() failed: connection reset by peer" was being
3424 written to the panic log as well as the main log, but it isn't really
3425 panic-worthy as it just means the connection died rather early on. I have
3426 removed the panic log writing for the ECONNRESET error when getsockname()
3429 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3430 runs only) independently of the message's sender address. This meant
3431 that, if the 4xx error was in fact related to the sender, a different
3432 message to the same recipient with a different sender could confuse
3433 things. In particular, this can happen when sending to a greylisting
3434 server, but other circumstances could also provoke similar problems.
3435 I have changed the default so that the retry time for these errors is now
3436 based a combination of the sender and recipient addresses. This change
3437 can be overridden by setting address_retry_include_sender=false in the
3440 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3441 remote server are returned as part of bounce messages. This was not
3442 happening for LMTP over a pipe (the lmtp transport), but now it is the
3443 same for both kinds of LMTP.
3445 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3446 in header lines that were in fact CNAMEs. This is no longer the case.
3448 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3449 and queue runs started by the daemon processed all messages. This has
3450 been fixed so that -R and -S can now usefully be given with -q<time>.
3452 PH/40 Import PCRE release 6.7 (fixes some bugs).
3454 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3456 PH/42 Give an error if -q is specified more than once.
3458 PH/43 Renamed the variables $interface_address and $interface_port as
3459 $received_ip_address and $received_port, to make it clear that these
3460 values apply to message reception, and not to the outgoing interface when
3461 a message is delivered. (The old names remain recognized, of course.)
3463 PH/44 There was no timeout on the connect() call when using a Unix domain
3464 socket in the ${readsocket expansion. There now is.
3466 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3467 be meaningful with "accept".
3469 SC/01 Eximstats V1.43
3470 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3472 SC/02 Eximstats V1.44
3473 Use a glob alias rather than an array ref in the generated
3474 parser. This improves both readability and performance.
3476 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3477 Collect SpamAssassin and rejection statistics.
3478 Don't display local sender or destination tables unless
3479 there is data to show.
3480 Added average volumes into the top table text output.
3482 SC/04 Eximstats V1.46
3483 Collect data on the number of addresses (recipients)
3484 as well as the number of messages.
3486 SC/05 Eximstats V1.47
3487 Added 'Message too big' to the list of mail rejection
3488 reasons (thanks to Marco Gaiarin).
3490 SC/06 Eximstats V1.48
3491 Mainlog lines which have GMT offsets and are too short to
3492 have a flag are now skipped.
3494 SC/07 Eximstats V1.49 (Alain Williams)
3495 Added the -emptyok flag.
3497 SC/08 Eximstats V1.50
3498 Fixes for obtaining the IP address from reject messages.
3500 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3501 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3502 whitespace changes from 4.64-PH/27
3504 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3507 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3508 are found, allow negative numbers in numeric criteria)
3510 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3512 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3513 to match changes made in 4.64-PH/43
3515 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3517 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3518 "domain" is actually an IP address, and force a failure. This locks out
3519 those revolvers/nameservers that support "A-for-A" lookups, in
3520 contravention of the specifications.
3522 PH/48 When a host name was looked up from an IP address, and the subsequent
3523 forward lookup of the name timed out, the host name was left in
3524 $sender_host_name, contrary to the specification.
3526 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3527 restricted to single-key lookups, Exim was not diagnosing an error if
3528 * or *@ was used with a query-style lookup.
3530 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3532 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3533 long ago, but noone interested enough thought of it. Let's just say that
3534 the "1.1" means that there are some new functions that weren't there at
3535 some point in the past.
3537 PH/51 Error processing for expansion failure of helo_data from an smtp
3538 transport during callout processing was broken.
3540 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3541 tested/used via the -bh/-bhc/-bs options.
3543 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3544 bug, fixed in subsequent PCRE releases).
3546 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3547 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3549 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3555 SC/01 Use a glob alias rather than an array ref in eximstats generated
3556 parser. This improves both readability and performance.
3558 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3559 Don't display local sender or destination tables in eximstats unless
3560 there is data to show.
3561 Added average volumes into the eximstats top table text output.
3563 SC/03 Collect data on the number of addresses (recipients) as well
3564 as the number of messages in eximstats.
3566 TF/01 Correct an error in the documentation for the redirect router. Exim
3567 does (usually) call initgroups() when daemonizing.
3569 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3570 with consistent privilege compared to when running as a daemon.
3572 TF/03 Note in the spec that $authenticated_id is not set for local
3573 submissions from trusted users.
3575 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3576 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3578 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3579 by adding some example configuration directives to the default
3580 configuration file. A little bit of work is required to uncomment the
3581 directives and define how usernames and passwords are checked, but
3582 there is now a framework to start from.
3584 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3585 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3586 without this. I don't know how relevant this is to other LDAP libraries.
3588 PH/02 Add the verb name to the "unknown ACL verb" error.
3590 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3592 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3594 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3595 directory not expanded when it should be if an expanded home directory
3596 was set for the address (which is overridden by the transport).
3598 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3601 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3602 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3603 because it is too late at that time, and has no effect.
3605 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3606 security issue with \' (bugzilla #107). I could not use the
3607 PQescapeStringConn() function, because it needs a PGconn value as one of
3610 PH/08 When testing addresses using -bt, indicate those final addresses that
3611 are duplicates that would not cause an additional delivery. At least one
3612 person was confused, thinking that -bt output corresponded to deliveries.
3613 (Suppressing duplicates isn't a good idea as you lose the information
3614 about possibly different redirections that led to the duplicates.)
3616 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3617 systems where poll() doesn't work, in particular OS X.
3619 PH/10 Added more information to debugging output for retry time not reached.
3621 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3622 operations in malware.c.
3624 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3627 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3628 syslog_duplication set false, log lines that would normally be written
3629 both the the main log and to the reject log were not written to syslog at
3632 PH/14 In the default configuration, change the use of "message" in ACL warn
3633 statements to "add_header".
3635 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3636 not followed by a command (e.g. "seen endif").
3638 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3639 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3642 PH/17 Added extra conditions to the default value of delay_warning_condition
3646 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3647 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3648 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3651 The Auto-Submitted: and various List- headers are standardised, whereas I
3652 don't think Precedence: ever was.
3654 PH/18 Refactored debugging code in route_finduser() to show more information,
3655 in particular, the error code if getpwnam() issues one.
3657 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3658 This is apparently needed in addition to the PH/07 change above to avoid
3659 any possible encoding problems.
3661 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3662 but not after initializing Perl.
3664 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3665 output them only if debugging. By default they are written stderr,
3666 apparently, which is not desirable.
3668 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3671 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3674 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3676 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3677 authenticated or an ident call has been made. Suppress the default
3678 values for $authenticated_id and $authenticated_sender (but permit -oMai
3679 and -oMas) when testing with -bh.
3681 PH/24 Re-jigged the order of the tests in the default configuration so that the
3682 tests for valid domains and recipients precede the DNS black list and CSA
3683 tests, on the grounds that those ones are more expensive.
3685 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3686 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3687 This bug exists in every version of Exim that I still have, right back to
3690 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3691 However, an attempt to turn on case-sensitivity in a regex key by
3692 including (?-i) didn't work because the subject string was already
3693 lowercased, and the effects were non-intuitive. It turns out that a
3694 one-line patch can be used to allow (?-i) to work as expected.
3700 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3701 other effects) broke the use of negated acl sub-conditions.
3703 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3706 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3707 "Deny" causes Exim to reject the incoming connection with a 554 error.
3708 Unfortunately, if there is a major crisis, such as a disk failure,
3709 tcp-wrappers gives "deny", whereas what one would like would be some
3710 kind of temporary error. A kludge has been added to help with this.
3711 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3712 554 error is used if errno is still zero or contains ENOENT (which occurs
3713 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3716 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3718 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3719 errors. Otherwise a message that provokes a temporary error (when other
3720 messages do not) can cause a whole host to time out.
3722 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3723 addresses were routed directly to files or pipes from a redirect router.
3724 File deliveries just didn't batch; pipe deliveries might have suffered
3727 PH/06 A failure to get a lock for a hints database would erroneously always say
3728 "Failed to get write lock", even when it was really a read lock.
3730 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3731 of 0600. This has been changed to use the value of the lockfile_mode
3732 option (which defaults to 0600).
3734 PH/08 Applied small patch from the Sieve maintainer.
3736 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3737 folder from quota calculations, a direct delivery into this folder messed
3738 up the contents of the maildirsize file. This was because the regex was
3739 used only to exclude .Trash (or whatever) when the size of the mailbox
3740 was calculated. There was no check that a delivery was happening into an
3741 excluded directory. This bug has been fixed by ignoring all quota
3742 processing for deliveries into excluded directories.
3744 PH/10 Added the maildirfolder_create_regex option to appendfile.
3750 PH/01 The code for finding all the local interface addresses on a FreeBSD
3751 system running IPv6 was broken. This may well have applied to all BSD
3752 systems, as well as to others that have similar system calls. The broken
3753 code found IPv4 interfaces correctly, but gave incorrect values for the
3754 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3755 that it would not match correctly against @[] and not recognize the IPv6
3758 PH/02 The ipliteral router was not recognizing addresses of the form user@
3759 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3761 PH/03 Added disable_ipv6.
3763 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3764 decoded form, because it is most often used to construct To: headers
3765 lines in autoreplies, and the decoded form may well be syntactically
3766 invalid. However, $reply_address has leading white space removed, and all
3767 newlines turned into spaces so that the autoreply transport does not
3770 PH/05 If group was specified without a user on a router, and no group or user
3771 was specified on a transport, the group from the router was ignored.
3773 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3774 for visible compile-time settings that can be used to change these
3775 numbers, for those that want even more. Backwards compatibility with old
3776 spool files has been maintained. However, going back to a previous Exim
3777 release will lost any variables that are in spool files.
3779 PH/07 Two small changes when running in the test harness: increase delay when
3780 passing a TCP/IP connection to a new process, in case the original
3781 process has to generate a bounce, and remove special handling of
3782 127.0.0.2 (sic), which is no longer necessary.
3784 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3785 be the same on different OS.
3787 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3790 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3791 whether --show-vars was specified or not
3793 JJ/02 exipick: Added support for new ACL variable spool format introduced
3796 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3797 syntactically invalid From: or Reply-to: line, and a filter used this to
3798 generate an autoreply, and therefore failed to obtain an address for the
3799 autoreply, Exim could try to deliver to a non-existent relative file
3800 name, causing unrelated and misleading errors. What now happens is that
3801 it logs this as a hard delivery error, but does not attempt to create a
3804 PH/11 The exinext utility has a -C option for testing purposes, but although
3805 the given file was scanned by exinext itself; it wasn't being passed on
3806 when Exim was called.
3808 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3809 an end-of-file indication when reading a command response.
3811 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3812 compiled. In many other places in Exim, IPv6 addresses are always
3813 recognized, so I have changed this. It also means that IPv4 domain
3814 literals of the form [IPV4:n.n.n.n] are now always recognized.
3816 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3817 used if the router is not running as root, for example, when verifying at
3818 ACL time, or when using -bh. The debugging output from this situation was
3819 non-existent - all you got was a failure to exec. I have made two
3822 (a) Failures to set uid/gid, the current directory, or a process leader
3823 in a subprocess such as that created by queryprogram now generate
3824 suitable debugging output when -d is set.
3826 (b) The queryprogram router detects when it is not running as root,
3827 outputs suitable debugging information if -d is set, and then runs
3828 the subprocess without attempting to change uid/gid.
3830 PH/15 Minor change to Makefile for building test_host (undocumented testing
3833 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3834 additional section of a DNS packet that returns MX or SRV records.
3835 Instead, it always explicitly searches for A/AAAA records. This avoids
3836 major problems that occur when a DNS server includes only records of one
3837 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3838 fixed another bug: if SRV records were looked up and the corresponding
3839 address records were *not* found in the additional section, the port
3840 values from the SRV records were lost.
3842 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3843 using the correct key (the original address) when searching the retry
3844 rules in order to find which one to use for generating the retry hint.
3846 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3847 adding the default one. Similarly, if it contains a Reply-To: header, the
3848 errors_reply_to option, if set, is not used.
3850 PH/19 When calculating a retry time, Exim used to measure the "time since
3851 failure" by looking at the "first failed" field in the retry record. Now
3852 it does not use this if it is later than than the arrival time of the
3853 message. Instead it uses the arrival time. This makes for better
3854 behaviour in cases where some deliveries succeed, thus re-setting the
3855 "first failed" field. An example is a quota failure for a huge message
3856 when small messages continue to be delivered. Without this change, the
3857 "time since failure" will always be short, possible causing more frequent
3858 delivery attempts for the huge message than are intended.
3859 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3861 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3862 $1, $2, $3) because the numerical variables can be reset during some
3863 expansion items (e.g. "match"), thereby losing the authentication data.
3865 PH/21 Make -bV show the size of off_t variables so that the test suite can
3866 decide whether to run tests for quotas > 2G.
3868 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3869 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3870 filecount value is greater than 2G or if a quota value is greater than 2G
3871 on a system where the size of off_t is not greater than 4, a panic error
3874 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3875 never match. The debug and -bh output now contains an explicit error
3876 message indicating a malformed IPv4 address or mask.
3878 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3879 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3880 PH/23 above applies.
3882 PH/25 Do not write to syslog when running in the test harness. The only
3883 occasion when this arises is a failure to open the main or panic logs
3884 (for which there is an explicit test).
3886 PH/26 Added the /no_tell option to "control=freeze".
3888 PH/27 If a host name lookup failed very early in a connection, for example, if
3889 the IP address matched host_lookup and the reverse lookup yielded a name
3890 that did not have a forward lookup, an error message of the form "no IP
3891 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3892 could be logged. Now it outputs the IP address instead of "NULL".
3894 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3895 allows the sender and the authenticated sender to be set when
3896 submitting a message from within Exim. Since child_open_exim() is
3897 documented for local_scan(), the new function should be too.
3899 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3900 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3901 results in an empty string is now treated as unset.
3903 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3905 PH/31 Added sender_verify_fail logging option.
3907 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3908 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3909 tidied the source and removed it altogether.
3911 PH/33 When a queue run was abandoned because the load average was too high, a
3912 log line was always written; now it is written only if the queue_run log
3913 selector is set. In addition, the log line for abandonment now contains
3914 information about the queue run such as the pid. This is always present
3915 in "start" and "stop" lines but was omitted from the "abandon" line.
3917 PH/34 Omit spaces between a header name and the colon in the error message that
3918 is given when verify = headers_syntax fails (if there are lots of them,
3919 the message gets confusing).
3921 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3922 names, as there are now some PTR records that contain slashes. This check
3923 is only to protect against broken name servers that fall over on strange
3924 characters, so the fact that it applies to all lookups doesn't matter.
3926 PH/36 Now that the new test suite is complete, we can remove some of the
3927 special code in Exim that was needed for the old test suite. For example,
3928 sorting DNS records because real resolvers return them in an arbitrary
3929 order. The new test suite's fake resolver always returns records in the
3932 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3933 bounces) except when queue_only is set, to avoid logging races between
3934 the different processes.
3936 PH/38 Panic-die if .include specifies a non-absolute path.
3938 PH/39 A tweak to the "H" retry rule from its user.
3940 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3941 a label. They prevented compilation on older perls.
3943 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3944 a warning to be raised on newish perls.
3946 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3947 on queue. Changes to match documented behaviour of showing count of
3948 messages matching specified criteria.
3950 PH/40 Changed the default ident timeout from 30s to 5s.
3952 PH/41 Added support for the use of login_cap features, on those BSD systems
3953 that have them, for controlling the resources used by pipe deliveries.
3955 PH/42 The content-scanning code uses fopen() to create files in which to put
3956 message data. Previously it was not paying any attention to the mode of
3957 the files. Exim runs with umask(0) because the rest of the code creates
3958 files with open(), and sets the required mode explicitly. Thus, these
3959 files were ending up world-writeable. This was not a big issue, because,
3960 being within the spool directory, they were not world-accessible. I have
3961 created a function called modefopen, which takes an additional mode
3962 argument. It sets umask(777), creates the file, chmods it to the required
3963 mode, then resets the umask. All the relevant calls to fopen() in the
3964 content scanning code have been changed to use this function.
3966 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3967 to 24 hours. This avoids potential overflow problems when processing G
3968 and H retry rules. I suspect nobody ever tinkers with this value.
3970 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3972 PH/45 When the plaintext authenticator is running as a client, the server's
3973 challenges are checked to ensure they are valid base64 strings. By
3974 default, the authentication attempt is cancelled if an invalid string is
3975 received. Setting client_ignore_invalid_base64 true ignores these errors.
3976 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3977 they are received. Thus, the responses can be made to depend on the
3978 challenges. If an invalid string is ignored, an empty string is placed in
3981 PH/46 Messages that are created by the autoreply transport now contains a
3982 References: header, in accordance with RFCs 2822 and 3834.
3984 PH/47 Added authenticated_sender_force to the smtp transport.
3986 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3988 PH/49 Installed latest patch from the Sieve maintainer.
3990 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3991 was also set, the appendfile transport was unnecessarily scanning a
3992 directory of message files (e.g. for maildir delivery) to find the count
3993 of files (along with the size), even though it did not need this
3994 information. It now does the scan only if it needs to find either the
3995 size of the count of files.
3997 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3999 PH/52 Two bugs concerned with error handling when the smtp transport is
4002 (i) Exim was not creating retry information for temporary errors given
4003 for individual recipients after the DATA command when the smtp transport
4004 was used in LMTP mode. This meant that they could be retried too
4005 frequently, and not timed out correctly.
4007 (ii) Exim was setting the flag that allows error details to be returned
4008 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4009 recipients that were returned after the DATA command.
4011 PH/53 This is related to PH/52, but is more general: for any failing address,
4012 when detailed error information was permitted to be returned to the
4013 sender, but the error was temporary, then after the final timeout, only
4014 "retry timeout exceeded" was returned. Now it returns the full error as
4015 well as "retry timeout exceeded".
4017 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4018 do this, and (what is worse) MTAs that accept it.
4020 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4021 will now be deprecated.
4023 PH/56 New os.c-cygwin from the Cygwin maintainer.
4025 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4026 formats (previously only available in exim formats via -bpr, -bpru,
4027 and -bpra. Now also available in native and exiqgrep formats)
4029 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4030 with very large, slow to parse queues
4032 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4034 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4036 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4037 responses to authentication challenges, though it was showing the
4038 challenges; (ii) I've removed the CR characters from the debug output for
4041 PH/58 Allow for the insertion of a newline as well as a space when a string
4042 is turned into more than one encoded-word during RFC 2047 encoding. The
4043 Sieve code now uses this.
4045 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4046 data_4xx, lost_connection, tls_required.
4048 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4049 message was being sent as an SMTP response.
4051 PH/61 Add -l and -k options to exicyclog.
4053 PH/62 When verifying, if an address was redirected to one new address, so that
4054 verification continued, and the new address failed or deferred after
4055 having set something in $address_data, the value of $address_data was not
4056 passed back to the ACL. This was different to the case when no
4057 redirection occurred. The value is now passed back in both cases.
4059 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4060 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4061 use login_cap.h, so on its own it isn't the distinguishing feature. The
4062 new name refers directly to the setclassresources() function.
4064 PH/65 Added configuration files for NetBSD3.
4066 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4068 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4069 is preferred over IPv4.
4071 PH/68 The bounce_return_message and bounce_return_body options were not being
4072 honoured for bounces generated during the reception of non-SMTP messages.
4073 In particular, this applied to messages rejected by the ACL. This bug has
4074 been fixed. However, if bounce_return_message is true and bounce_return_
4075 body is false, the headers that are returned for a non-SMTP message
4076 include only those that have been read before the error was detected.
4077 (In the case of an ACL rejection, they have all been read.)
4079 PH/69 The HTML version of the specification is now built in a directory called
4080 spec_html instead of spec.html, because the latter looks like a path with
4081 a MIME-type, and this confuses some software.
4083 PH/70 Catch two compiler warnings in sieve.c.
4085 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4086 function verify_get_ident() calls ip_connect() to connect a socket, but
4087 if the "connect()" function timed out, ip_connect() used to close the
4088 socket. However, verify_get_ident() also closes the socket later, and in
4089 between Exim writes to the log, which may get opened at this point. When
4090 the socket was closed in ip_connect(), the log could get the same file
4091 descriptor number as the socket. This naturally causes chaos. The fix is
4092 not to close the socket in ip_connect(); the socket should be closed by
4093 the function that creates it. There was only one place in the code where
4094 this was missing, in the iplookup router, which I don't think anybody now
4095 uses, but I've fixed it anyway.
4097 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4098 well as to direct DNS lookups. Otherwise the handling of names in host
4099 lists is inconsistent and therefore confusing.
4105 PH/01 Two changes to the default runtime configuration:
4107 (1) Move the checks for relay_from_hosts and authenticated clients from
4108 after to before the (commented out) DNS black list checks.
4110 (2) Add control=submission to the relay_from_hosts and authenticated
4111 clients checks, on the grounds that messages accepted by these
4112 statements are most likely to be submissions.
4114 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4116 (1) Generate an error if the third argument for the ${prvs expansion is
4119 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4122 (3) Reset the variables that are obtained from the first argument of
4123 ${prvscheck and used in the second argument before leaving the code,
4124 because their memory is reclaimed, so using them afterwards may do
4127 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4128 one (it's much easier than Tom thought :-).
4130 (5) Because of (4), we can now allow for the use of $prvscheck_result
4131 inside the third argument.
4133 PH/03 For some reason, the default setting of PATH when running a command from
4134 a pipe transport was just "/usr/bin". I have changed it to
4137 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4138 anything to be listed in the output from -bV.
4140 PH/05 When a filter generated an autoreply, the entire To: header line was
4141 quoted in the delivery log line, like this:
4143 => >A.N.Other <ano@some.domain> <original@ddress> ...
4145 This has been changed so that it extracts the operative address. There
4146 may be more than one such address. If so, they are comma-separated, like
4149 => >ano@some.domain,ona@other.domain <original@ddress> ...
4151 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4152 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4153 not being looked up in the rDNS to get a host name, Exim was showing the
4154 IP address twice in Received: lines, even though the IP addresses were
4155 identical. For example:
4157 Received: from [1.2.3.4] (helo=[1.2.3.4])
4159 However, if the real host name was known, it was omitting the HELO data
4160 if it matched the actual IP address. This has been tidied up so that it
4161 doesn't show the same IP address twice.
4163 PH/07 When both +timestamp and +memory debugging was on, the value given by
4164 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4165 called by the debug printing, thereby overwriting the timestamp buffer.
4166 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4168 PH/08 When the original message was included in an autoreply transport, it
4169 always said "this is a copy of the message, including all the headers",
4170 even if body_only or headers_only was set. It now gives an appropriate
4173 PH/09 Applied a patch from the Sieve maintainer which:
4175 o fixes some comments
4176 o adds the (disabled) notify extension core
4177 o adds some debug output for the result of if/elsif tests
4178 o points to the current vacation draft in the documentation
4179 and documents the missing references header update
4183 o fixes a bug in processing the envelope test (when testing
4184 multiple envelope elements, the last element determined the
4187 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4188 Electronic Mail") by including:
4190 Auto-submitted: auto-generated
4192 in the messages that it generates (bounce messages and others, such as
4193 warnings). In the case of bounce messages for non-SMTP messages, there was
4194 also a typo: it was using "Auto_submitted" (underscore instead of
4195 hyphen). Since every message generated by Exim is necessarily in response
4196 to another message, thes have all been changed to:
4198 Auto-Submitted: auto-replied
4200 in accordance with these statements in the RFC:
4202 The auto-replied keyword:
4204 - SHOULD be used on messages sent in direct response to another
4205 message by an automatic process,
4207 - MUST NOT be used on manually-generated messages,
4209 - MAY be used on Delivery Status Notifications (DSNs) and Message
4210 Disposition Notifications (MDNs),
4212 - MUST NOT be used on messages generated by automatic or periodic
4213 processes, except for messages which are automatic responses to
4216 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4217 to the default Received: header definition.
4219 PH/12 Added log selector acl_warn_skipped (default on).
4221 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4222 variables because (a) they are in the wrong storage pool and (b) even if
4223 they were copied, it wouldn't work properly because of the caching.
4225 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4226 checking when decoding. Apparently there are clients that generate
4227 overlong encoded strings. Why am I not surprised?
4229 PH/15 If the first argument of "${if match_address" was not empty, but did not
4230 contain an "@" character, Exim crashed. Now it writes a panic log message
4231 and treats the condition as false.
4233 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4235 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4236 extension "envelope-auth". The code is finished and in agreement with
4237 other implementations, but there is no documentation so far and in fact,
4238 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4239 not changing the active code.
4241 Print executed "if" and "elsif" statements when debugging is used. This
4242 helps a great deal to understand what a filter does.
4244 Document more things not specified clearly in RFC3028. I had all this
4245 sorted out, when out of a sudden new issues came to my mind. Oops."
4247 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4250 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4251 canonical form (as documented). However, after a host name lookup from
4252 the IP address, check_host() was doing a simple string comparison with
4253 addresses acquired from the DNS when checking that the found name did
4254 have the original IP as one of its addresses. Since any found IPv6
4255 addresses are likely to be in abbreviated form, the comparison could
4256 fail. Luckily, there already exists a function for doing the comparison
4257 by converting both addresses to binary, so now that is used instead of
4258 the text comparison.
4260 PH/20 There was another similar case to PH/19, when a complete host name was
4261 given in a host list; looking up its IP address could give an abbreviated
4262 form, whereas the current host's name might or might not be abbreviated.
4263 The same fix has been applied.
4269 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4270 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4273 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4274 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4276 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4278 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4279 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4280 Also, for "Auto-Submitted", treat anything other than "no" as
4281 non-personal, in accordance with RFC 3834. (Previously it treated
4282 anything starting "auto-" as non-personal.)
4284 TF/01 The control=submission/name=... option had a problem with syntax
4285 errors if the name included a slash character. The /name= option
4286 now slurps the rest of the string, so it can include any characters
4287 but it must come last in the list of options (after /sender_retain
4290 PH/05 Some modifications to the interface to the fake nameserver for the new
4298 TK/01 Added the "success_on_redirect" address verification option. See
4299 NewStuff for rationale and an example.
4301 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4303 PH/02 Patch to exigrep to allow it to work on syslog lines.
4305 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4306 fread() to skip over the body file's header line, because in Cygwin the
4307 header line is locked and is inaccessible.
4309 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4310 co-exist for some time) to make it clear that it is the Exim ID that is
4311 referenced, not the Message-ID: header line.
4313 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4314 string_format() function, because snprintf() does not exist on all
4317 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4318 ${stat: expansion item.
4320 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4321 protocol synchronization error", to keep the pedants happy.
4323 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4324 well as for IRIX systems, when gcc is being used. See the host.c source
4327 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4329 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4332 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4333 transport and to the smtp transport in LMTP mode.
4335 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4337 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4338 run a filter in a subprocess. This could lead to confusion in subsequent
4339 lookups in the parent process. There should also be a search_tidyup() at
4340 the end of the subprocess.
4342 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4343 only if the host matched helo_try_verify_hosts, which caused the
4344 verification to occur when the EHLO/HELO command was issued. The ACL just
4345 tested the remembered result. Now, if a previous verification attempt has
4346 not happened, "verify = helo" does it there and then.
4348 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4350 TK/03 Fix log output including CR from clamd.
4352 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4353 exist provoked a memory error which could cause a segfault.
4355 PH/15 Installed PCRE 6.2
4357 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4359 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4360 of the problem. Specifically, suggested +O2 rather than +O1 for the
4363 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4365 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4366 record, the port was not correctly logged when the outgoing_port log
4367 selector was set (it logged the transort's default port).
4369 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4370 fallback_hosts, and "hosts" in the smtp transport.
4372 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4373 host errors such as "Connection refused".
4375 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4376 authentication with radiusclient 0.4.9:
4378 - Error returned from rc_read_config was caught wrongly
4379 - Username/password not passed on to radius server due to wrong length.
4381 The presumption is that some radiusclient API changes for 4.51/PH/17
4382 were not taken care of correctly. The code is still untested by me (my
4383 Linux distribution still has 0.3.2 of radiusclient), but it was
4384 contributed by a Radius user.
4386 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4387 expanding the "port" option of the smtp transport.
4389 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4390 while reading a MIME header. Thanks to Tom Hughes for a patch.
4392 PH/24 Include config.h inside local_scan.h so that configuration settings are
4395 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4396 that in an ACL for RCPT (for example), you can examine exactly what was
4399 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4400 commands, but it was not correctly comparing the address with the actual
4401 client host address. Thus, it would show the EHLO address in Received:
4402 header lines when this was not necessary.
4404 PH/27 Added the % operator to ${eval:}.
4406 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4407 it should be ignoring failures (because with -C, for example, it has lost
4408 privilege). It wasn't ignoring creation failures other than "already
4411 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4414 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4415 because an input line was too long, either on its own, or by virtue of
4416 too many continuations, the temporary file was not being removed, and the
4417 return code was incorrect.
4419 PH/31 Missing "BOOL" in function definition in filtertest.c.
4421 PH/32 Applied Sieve patches from the maintainer.
4423 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4425 PH/33 Added "verify = not_blind".
4427 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4428 Local/Makefile (with some defaults set). These are used in built scripts
4429 such as exicyclog, but they have never been used in the exim_install
4430 script (though there are many overriding facilities there). I have
4431 arranged that the exim_install script now takes note of these two
4434 PH/35 Installed configuration files for Dragonfly.
4436 PH/36 When a locally submitted message by a trusted user did not contain a
4437 From: header, and the sender address was obtained from -f or from an SMTP
4438 MAIL command, and the trusted user did not use -F to supply a sender
4439 name, $originator_name was incorrectly used when constructing a From:
4440 header. Furthermore, $originator_name was used for submission mode
4441 messages from external hosts without From: headers in a similar way,
4442 which is clearly wrong.
4444 PH/37 Added control=suppress_local_fixups.
4446 PH/38 When log_selector = +received_sender was set, and the addition of the
4447 sender made the log line's construction buffer exactly full, or one byte
4448 less than full, an overflow happened when the terminating "\n" was
4451 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4452 when the result of a list match is failure because a DNS lookup failed.
4454 PH/40 RM_COMMAND is now used in the building process.
4456 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4457 the "build-* directories that it finds.
4459 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4460 address in a domain literal was a prefix of an interface address.
4462 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4463 when verifying a sender address, unless rewrite_headers is false.
4465 PH/44 Wrote a long comment about why errors_to addresses are verified as
4466 recipients, not senders.
4468 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4469 the ratelimit ACL was added.
4471 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4473 PH/46 Added extra information about PostgreSQL errors to the error string.
4475 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4476 avoiding the need to install special zones in a real server. This is
4477 backwards compatible; if it can't find the fake resolver, it drops back.
4478 Thus, both old and new test suites can be run.
4480 TF/02 Added util/ratelimit.pl
4482 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4483 clock is set back in time.
4485 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4486 Candler <B.Candler@pobox.com>.
4488 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4489 OK for addresses that are the result of redirections.
4491 PH/48 A number of further additions for the benefit of the new test suite,
4492 including a fake gethostbyname() that interfaces to the fake DNS resolver
4495 TF/06 The fix for widen_domains has also been applied to qualify_single and
4496 search_parents which are the other dnslookup options that can cause
4499 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4502 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4504 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4505 service" if it encountered an MX record with an empty target hostname.
4506 The message is now "an MX or SRV record indicated no SMTP service".
4508 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4509 if the DNS of the sending site is misconfigured. This is quite a
4510 common situation. This change restores the behaviour of treating a
4511 helo verification defer as a failure.
4513 PH/51 If self=fail was set on a router, the bounce message did not include the
4514 actual error message.
4520 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4522 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4523 command itself ended in error, the underlying message about the transport
4524 filter timeout was being overwritten with the pipe command error. Now the
4525 underlying error message should be appended to the second error message.
4527 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4529 PH/02 Reduce the amount of output that "make" produces by default. Full output
4530 can still be requested.
4532 PH/03 The warning log line about a condition test deferring for a "warn" verb
4533 was being output only once per connection, rather than after each
4534 occurrence (because it was using the same function as for successful
4535 "warn" verbs). This seems wrong, so I have changed it.
4537 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4538 it should not have, which might have caused a crash in the right
4539 circumstances, but probably never did.
4541 PH/04 Installed a modified version of Tony Finch's patch to make submission
4542 mode fix the return path as well as the Sender: header line, and to
4543 add a /name= option so that you can make the user's friendly name appear
4546 TF/03 Added the control = fakedefer ACL modifier.
4548 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4549 Mark Lowes for thorough testing.
4551 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4553 TK/03 Merged latest SRS patch from Miles Wilton.
4555 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4556 with the definition in sysexits.h (which is #included earlier).
4557 Fortunately, Exim does not actually use EX_OK. The code used to try to
4558 preserve the sysexits.h value, by assuming that macro definitions were
4559 scanned for macro replacements. I have been disabused of this notion,
4560 so now the code just undefines EX_OK before #including unistd.h.
4562 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4563 in the smtp transport. When a block could not be written in a single
4564 write() function, the timeout was being re-applied to each part-write.
4565 This seems wrong - if the receiver was accepting one byte at a time it
4566 would take for ever. The timeout is now adjusted when this happens. It
4567 doesn't have to be particularly precise.
4569 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4570 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4572 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4573 without a domain if the check to <postmaster@domain> fails.
4575 SC/01 Eximstats: added -xls and the ability to specify output files
4576 (patch written by Frank Heydlauf).
4578 SC/02 Eximstats: use FileHandles for outputting results.
4580 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4582 SC/04 Eximstats: fixed display of large numbers with -nvr option
4584 SC/05 Eximstats: fixed merging of reports with empty tables.
4586 SC/06 Eximstats: added the -include_original_destination flag
4588 SC/07 Eximstats: removed tabs and trailing whitespace.
4590 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4592 TK/06 MBOX spool code: Add real "From " MBOX separator line
4593 so the .eml file is really in mbox format (even though
4594 most programs do not really care). Patch from Alex Miller.
4596 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4597 The latter is generated from $received_to and is only set if the
4598 message has one envelope recipient. SA can use these headers,
4599 obviously out-of-the-box. Patch from Alex Miller.
4601 PH/08 The ${def test on a variable was returning false if the variable's
4602 value was "0", contrary to what the specification has always said!
4603 The result should be true unless the variable is empty.
4605 PH/09 The syntax error of a character other than { following "${if
4606 def:variable_name" (after optional whitespace) was not being diagnosed.
4607 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4608 accidental colon was present, for example, could give incorrect results.
4610 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4611 result is used (not including appendfile, where other changes are about
4614 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4615 This involved changing a lot of size variables from int to off_t. It
4616 should work with maildirs and everything.
4618 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4619 spamd dying while we are connected to it.
4621 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4624 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4625 function for BDB 4.3.
4627 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4629 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4630 the sources for PCRE have been re-arranged and more files are now
4633 PH/15 The code I had for printing potentially long long variables in PH/11
4634 above was not the best (it lost precision). The length of off_t variables
4635 is now inspected at build time, and an appropriate printing format (%ld
4636 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4637 to be "long long int" or "long int". This is needed for the internal
4638 formatting function string_vformat().
4640 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4641 the configuration file to be ":syslog", then the script "guesses" where
4642 the logs files are, rather than using the compiled in default. In our
4643 case the guess is not the same as the compiled default, so the script
4644 suddenly stopped working when I started to use syslog. The patch checks
4645 to see if log_file_path is "". If so, it attempts to read it from exim
4646 with no configuration file to get the compiled in version, before it
4647 falls back to the previous guessing code."
4649 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4650 implementing BATV in an Exim configuration. See NewStuff for the gory
4653 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4654 Makefile that are specific to HP-UX.
4656 PH/18 If the "use_postmaster" option was set for a recipient callout together
4657 with the "random" option, the postmaster address was used as the MAIL
4658 FROM address for the random test, but not for the subsequent recipient
4659 test. It is now used for both.
4661 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4662 patch removes a few documentation additions to RFC 3028, because the
4663 latest draft now contains them. It adds the new en;ascii-case comparator
4664 and a new error check for 8bit text in MIME parts. Comparator and
4665 require names are now matched exactly. I enabled the subaddress
4666 extension, but it is not well tested yet (read: it works for me)."
4668 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4669 rework some of the code of TK/09 above to avoid the hardwired use of
4670 "%lld" and "long long". Replaced the call to snprintf() with a call to
4673 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4674 records point to non-existent hosts", "retry timeout exceeded", and
4675 "retry time not reached for any host after a long failure period".
4677 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4678 experimental DomainKeys support:
4680 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4681 (2) On an error such as an illegally used "control", the wrong name for
4682 the control was given.
4684 These problems did NOT occur unless DomainKeys support was compiled.
4686 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4688 PH/24 Added ${if match_ip condition.
4690 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4691 databases so that it will be absolutely obvious if a crash occurs in the
4692 DB library. This is a regular occurrence (often caused by mis-matched
4695 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4696 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4697 picked up on a user's system that detects such things. There doesn't seem
4698 to be a gcc warning option for this - only an attribute that has to be
4699 put on the function's prototype. It seems that in Fedora Core 4 they have
4700 set this on a number of new functions. No doubt there will be more in due
4703 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4704 specify a transport. However, if an address that was verified by such a
4705 router was the subject of a callout, Exim crashed because it tried to
4706 read the rcpt_include_affixes from the non-existent transport. Now it
4707 just assumes that the setting of that option is false. This bug was
4708 introduced by 4.51/PH/31.
4710 PH/28 Changed -d+all to exclude +memory, because that information is very
4711 rarely of interest, but it makes the output a lot bigger. People tend to
4712 do -d+all out of habit.
4714 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4715 code in os-type was giving problems when libc.so lives in lib64, like on
4718 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4719 aren't the modern standard, and it seems that some systems' include files
4720 don't always have them. Exim was already checking for some of the newer
4721 ones like T_AAAA, and defining it itself. I've added checks for all the
4722 record types that Exim uses.
4724 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4725 not automatically generating a new one, as it is supposed to. This
4726 prevented TLS from working. If the file did exist, but contained invalid
4727 data, a new version was generated, as expected. It was only the case of a
4728 non-existent file that was broken.
4730 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4731 with a change in libdomainkeys > 0.64.
4733 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4734 from DNS. If the selector record carries the flag, it now has
4735 precedence over the domain-wide flag.
4737 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4739 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4740 the use of a port name that isn't defined in /etc/services) occurred, the
4741 message was deferred as in a normal delivery, and thus remained on the
4742 spool, instead of being failed because of the mua_wrapper setting. This
4743 is now fixed, and I tidied up some of the mua_wrapper messages at the
4746 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4747 the messages in a hash of arrays rather than using individual hashes.
4748 This is a bit cleaner and results in dramatic memory savings, albeit
4749 at a slight CPU cost.
4751 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4752 as requested by Marc Sherman.
4754 SC/10 Eximstats: added histograms for user specified patterns as requested
4757 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4759 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4760 fopen() in the content-scanning modules that did not already have it.
4766 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4767 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4769 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4771 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4773 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4774 to test Sieve filters that use "vacation".
4776 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4777 that changes the way the GnuTLS parameters are stored in the cache file.
4778 The new format can be generated externally. For backward compatibility,
4779 if the data in the cache doesn't make sense, Exim assumes it has read an
4780 old-format file, and it generates new data and writes a new file. This
4781 means that you can't go back to an older release without removing the
4784 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4785 work if there are any delivery delays because "one_time" forces the
4786 parent to be marked "delivered", so its unseen clone is never tried
4787 again. For this reason, Exim now forbids the simultaneous setting of
4790 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4791 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4792 entry if you want to know the details. The fix, however, neglected to
4793 consider the case when local delivery batching is involved. The test for
4794 "previously delivered" was not happening when checking to see if an
4795 address could be batched with a previous (undelivered) one; under
4796 certain circumstances this could lead to multiple deliveries to the same
4799 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4800 in its include files, and this causes problems building Exim.
4802 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4803 header_syntax) but Exim was just ignoring anything given after a slash.
4804 In particular, this caused confusion with an attempt to use "verify =
4805 reverse_host_lookup/defer_ok". An error is now given when options are
4806 supplied for verify items that do not have them. (Maybe reverse_host_
4807 lookup should have a defer_ok option, but that's a different point.)
4809 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4810 defined by RFC 821) to 2048, because there were problems with some AUTH
4811 commands, and RFC 1869 says the size should be increased for extended
4812 SMTP commands that take arguments.
4814 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4817 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4818 "unknown" error; now it says that the functionality isn't in the binary.
4820 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4821 an address' error message when a string expansion fails (syntax or
4822 whatever). Otherwise the password may appear in the log. Following change
4823 PH/42 below, there is no longer a chance of it appearing in a bounce
4826 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4828 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4829 of its addresses was ever tried. (Bugzilla bug #2.)
4831 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4832 the result incorrectly in the debug output. (It correctly added a newline
4833 to what was transported.)
4835 TF/01 Added $received_time.
4837 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4838 commented out examples of how to interface to a virus scanner and to
4839 SpamAssassin. Also added commented examples of av_scanner and
4840 spamd_address settings.
4842 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4843 and controls are allowed in which ACLs. There were a couple of minor
4844 errors. Some of the entries in the conditions table (which is a table of
4845 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4846 negation of where the condition IS allowed.
4848 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4850 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4851 header file does not have a version number, so I've had to invent a new
4852 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4853 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4854 radiusclient), but it was contributed by a Radius user.
4856 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4857 files or directories, for OpenSSL.
4859 PH/19 When an Exim process that is running as root has to create an Exim log
4860 file, it does so in a subprocess that runs as exim:exim so as to get the
4861 ownership right at creation (otherwise, other Exim processes might see
4862 the file with the wrong ownership). There was no test for failure of this
4863 fork() call, which would lead to the process getting stuck as it waited
4864 for a non-existent subprocess. Forks do occasionally fail when resources
4865 run out. I reviewed all the other calls to fork(); they all seem to check
4868 PH/20 When checking for unexpected SMTP input at connect time (before writing
4869 the banner), Exim was not dealing correctly with a non-positive return
4870 from the read() function. If the client had disconnected by this time,
4871 the result was a log entry for a synchronization error with an empty
4872 string after "input=" when read() returned zero. If read() returned -1
4873 (an event I could not check), uninitialized data bytes were printed.
4874 There were reports of junk text (parts of files, etc) appearing after
4877 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4879 PH/22 Added support for macro redefinition, and (re)definition in between
4880 driver and ACL definitions.
4882 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4883 forgetting to use the resulting value; it was using the unexpanded value.
4885 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4886 hadn't been configured. The fix is from Juergen Kreileder, who
4887 understands it better than I do:
4889 "Here's what I see happening with three configured cyrus_sasl
4890 authenticators configured (plain, login, cram-md5):
4892 On startup auth_cyrus_sasl_init() gets called for each of these.
4893 This means three calls to sasl_listmech() without a specified mech_list.
4894 => SASL tests which mechs of all available mechs actually work
4895 => three warnings about OTP not working
4896 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4898 With the patch, sasl_listmech() also gets called three times. But now
4899 SASL's mech_list option is set to the server_mech specified in the the
4900 authenticator. Or in other words, the answer from sasl_listmech()
4901 gets limited to just the mech you're testing for (which is different
4903 => the return list contains just 'plain' or 'login', 'cram-md5' or
4904 nothing depending on the value of ob->server_mech.
4906 I've just tested the patch: Authentication still works fine,
4907 unavailable mechs specified in the exim configuration are still
4908 caught, and the auth.log warnings about OTP are gone."
4910 PH/25 When debugging is enabled, the contents of the command line are added
4911 to the debugging output, even when log_selector=+arguments is not
4914 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4915 answer is "GNU", and only if the return is "GNU/something" is the answer
4918 PH/27 $acl_verify_message is now set immediately after the failure of a
4919 verification in an ACL, and so is available in subsequent modifiers. In
4920 particular, the message can be preserved by coding like this:
4922 warn !verify = sender
4923 set acl_m0 = $acl_verify_message
4925 Previously, $acl_verify_message was set only while expanding "message"
4926 and "log_message" when a very denied access.
4928 PH/28 Modified OS/os.c-Linux with
4930 -#ifndef OS_LOAD_AVERAGE
4931 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4933 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4934 nomenclature these days.)
4936 PH/29 Installed patch from the Sieve maintainer that adds the options
4937 sieve_useraddress and sieve_subaddress to the redirect router.
4939 PH/30 In these circumstances:
4940 . Two addresses routed to the same list of hosts;
4941 . First host does not offer TLS;
4942 . First host accepts first address;
4943 . First host gives temporary error to second address;
4944 . Second host offers TLS and a TLS session is established;
4945 . Second host accepts second address.
4946 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4947 and peerdn, if requested) that were in fact used only for the second
4950 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4951 attention to any local part prefix or suffix that was matched by the
4952 router that accepted the address. It now behaves in the same way as it
4953 does for delivery: the affixes are removed from the local part unless
4954 rcpt_include_affixes is set on the transport.
4956 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4957 timeout during the DATA phase of an incoming message.
4959 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4960 applied a patch sanctioned by the Sieve maintainer.
4962 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4963 the uid or gid is negative. A case of a negative gid caused this to be
4964 noticed. The fix allows for either to be negative.
4966 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4967 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4970 PH/36 The change PH/12 above was broken. Fixed it.
4972 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4973 the grounds that routing the same address twice would always produce the
4974 same answer. This might have been true once, but it is certainly no
4975 longer true now. Routing a child address may depend on the previous
4976 routing that produced that child. Some complicated redirection strategies
4977 went wrong when messages had multiple recipients, and made Exim's
4978 behaviour dependent on the order in which the addresses were given.
4980 I have moved the duplicate checking until after the routing is complete.
4981 Exim scans the addresses that are assigned to local and remote
4982 transports, and removes any duplicates. This means that more work will be
4983 done, as duplicates will always all be routed, but duplicates are
4984 presumably rare, so I don't expect this is of any significance.
4986 For deliveries to pipes, files, and autoreplies, the duplicate checking
4987 still happens during the routing process, since they are not going to be
4990 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4991 It corrects a timeout issue with spamd. This is Ian's comment: "The
4992 background is that sometimes spamd either never reads data from a
4993 connection it has accepted, or it never writes response data. The exiscan
4994 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4995 blindly assumes that writes won't block so it may never time out."
4997 PH/39 Allow G after quota size as well as K and M.
4999 PH/40 The value set for $authenticated_id in an authenticator may not contain
5000 binary zeroes or newlines because the value is written to log lines and
5001 to spool files. There was no check on this. Now the value is run through
5002 the string_printing() function so that such characters are converted to
5003 printable escape sequences.
5005 PH/41 $message_linecount is a new variable that contains the total number of
5006 lines in the message. Compare $body_linecount, which is the count for the
5009 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5010 bounce and delay warning messages, except in certain special cases, which
5013 (a) An SMTP error message from a remote host;
5014 (b) A message specified in a :fail: redirection;
5015 (c) A message specified in a "fail" command in a system filter;
5016 (d) A message specified in a FAIL return from the queryprogram router;
5017 (e) A message specified by the cannot_route_message router option.
5019 In these cases only, Exim does include the error details in bounce and
5020 warning messages. There are also a few cases where bland messages such
5021 as "unrouteable address" or "local delivery error" are given.
5023 PH/43 $value is now also set for the "else" part of a ${run expansion.
5025 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5026 being worked on, but at least Exim now implements the latest version to
5029 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5030 process to complete was treated as a delivery failure, a timeout while
5031 writing the message to the pipe was logged, but erroneously treated as a
5032 successful delivery. Such timeouts include transport filter timeouts. For
5033 consistency with the overall process timeout, these timeouts are now
5034 treated as errors, giving rise to delivery failures by default. However,
5035 there is now a new Boolean option for the pipe transport called
5036 timeout_defer, which, if set TRUE, converts the failures into defers for
5037 both kinds of timeout. A transport filter timeout is now identified in
5040 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5041 systems where "make" and "gmake" are different, calling "gmake" at top
5042 level broke things. I've arranged for the value of $(MAKE) to be passed
5043 from the Makefile to this script so that it can call the same version of
5047 A note about Exim versions 4.44 and 4.50
5048 ----------------------------------------
5050 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5051 changes of various kinds. As a consequence, a big documentation update was
5052 needed. This delayed the release for rather longer than seemed good, especially
5053 in the light of a couple of (minor) security issues. Therefore, the changes
5054 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5055 release. So 4.44 and 4.50 are in effect two different branches that both start
5058 I have left the 4.50 change log unchanged; it contains all the changes since
5059 4.43. The change log for 4.44 is below; many of its items are identical to
5060 those for 4.50. This seems to be the most sensible way to preserve the
5061 historical information.
5067 1. Minor wording change to the doc/README.SIEVE file.
5069 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5070 computation of the current number of files was incorrect.
5072 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5073 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5076 4. Give more explanation in the error message when the command for a transport
5077 filter fails to execute.
5079 5. There are several places where Exim runs a non-Exim command in a
5080 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5081 was being done only for the command run by the queryprogram router. It is
5082 now done for all such subprocesses. The other cases are: ${run, transport
5083 filters, and the commands run by the lmtp and pipe transports.
5085 6. Added CONFIGURE_GROUP build-time option.
5087 7. Some older OS have a limit of 256 on the maximum number of file
5088 descriptors. Exim was using setrlimit() to set 1000 as a large value
5089 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5090 systems. I've change it so that if it can't get 1000, it tries for 256.
5092 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5093 was an oversight, and furthermore, ever since the addition of extra
5094 controls (e.g. 4.43/32), the checks on when to allow different forms of
5095 "control" were broken. There should now be diagnostics for all cases when a
5096 control that does not make sense is encountered.
5098 9. Added the /retain_sender option to "control=submission".
5100 10. $recipients is now available in the predata ACL (oversight).
5102 11. Tidy the search cache before the fork to do a delivery from a message
5103 received from the command line. Otherwise the child will trigger a lookup
5104 failure and thereby defer the delivery if it tries to use (for example) a
5105 cached ldap connection that the parent has called unbind on.
5107 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5108 of $address_data from the recipient verification was clobbered by the
5109 sender verification.
5111 13. The value of address_data from a sender verification is now available in
5112 $sender_address_data in subsequent conditions in the ACL statement.
5114 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5116 15. Added a new option "connect=<time>" to callout options, to set a different
5119 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5120 was its contents. (It was OK if the option was not defined at all.)
5122 17. A "Completed" log line is now written for messages that are removed from
5123 the spool by the -Mrm option.
5125 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5126 information about exactly what failed.
5128 19. Added -dd to debug only the daemon process.
5130 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5131 handles timeouts, both on the server side and network timeouts. Renamed the
5132 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5134 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5135 It is now set to "smtps".
5137 22. $host_address is now set to the target address during the checking of
5138 ignore_target_hosts.
5140 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5141 being passed; this would have caused $sender_host_name to have been used if
5142 matching the list had actually called for a host name (not very likely,
5143 since this list is usually IP addresses). A host name is now passed as
5146 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5147 code that specifies a non-restarting handler (typically sigaction() in
5148 modern systems) in an attempt to fix a rare and obscure crash bug.
5150 25. Narrowed the window for a race in the daemon that could cause it to ignore
5151 SIGCHLD signals. This is not a major problem, because they are used only to
5152 wake it up if nothing else does.
5154 26. A malformed maildirsize file could cause Exim to calculate negative values
5155 for the mailbox size or file count. Odd effects could occur as a result.
5156 The maildirsize information is now recalculated if the size or filecount
5159 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5160 support for a long time. Removed HAVE_SYS_VFS_H.
5162 28. Installed the latest version of exipick from John Jetmore.
5164 29. In an address list, if the pattern was not a regular expression, an empty
5165 subject address (from a bounce message) matched only if the pattern was an
5166 empty string. Non-empty patterns were not even tested. This was the wrong
5167 because it is perfectly reasonable to use an empty address as part of a
5168 database query. An empty address is now tested by patterns that are
5169 lookups. However, all the other forms of pattern expect the subject to
5170 contain a local part and a domain, and therefore, for them, an empty
5171 address still always fails if the pattern is not itself empty.
5173 30. Exim went into a mad DNS loop when attempting to do a callout where the
5174 host was specified on an smtp transport, and looking it up yielded more
5175 than one IP address.
5177 31. Re-factored the code for checking spool and log partition space into a
5178 function that finds that data and another that does the check. The former
5179 is then used to implement four new variables: $spool_space, $log_space,
5180 $spool_inodes, and $log_inodes.
5182 32. The RFC2047 encoding function was originally intended for short strings
5183 such as real names; it was not keeping to the 75-character limit for
5184 encoded words that the RFC imposes. It now respects the limit, and
5185 generates multiple encoded words if necessary. To be on the safe side, I
5186 have increased the buffer size for the ${rfc2047: expansion operator from
5189 33. It is now permitted to omit both strings after an "if" condition; if the
5190 condition is true, the result is "true". As before, when the second string
5191 is omitted, a false condition yields an empty string. This makes it less
5192 cumbersome to write custom ACL and router conditions.
5194 34. Failure to deliver a bounce message always caused it to be frozen, even if
5195 there was an errors_to setting on the router. The errors_to setting is now
5198 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5199 canonical form (fully expanded) before being placed in
5200 $sender_host_address.
5202 36. The table in the code that translates DNS record types into text (T_A to
5203 "A" for instance) was missing entries for NS and CNAME. It is just possible
5204 that this could have caused confusion if both these types were looked up
5205 for the same domain, because the text type is used as part of Exim's
5206 per-process caching. But the chance of anyone hitting this buglet seems
5209 37. The dnsdb lookup has been extended in a number of ways.
5211 (1) There is a new type, "zns", which walks up the domain tree until it
5212 finds some nameserver records. It should be used with care.
5214 (2) There is a new type, "mxh", which is like "mx" except that it returns
5215 just the host names, not the priorities.
5217 (3) It is now possible to give a list of domains (or IP addresses) to be
5218 looked up. The behaviour when one of the lookups defers can be
5219 controlled by a keyword.
5221 (4) It is now possible to specify the separator character for use when
5222 multiple records are returned.
5224 38. The dnslists ACL condition has been extended: it is now possible to supply
5225 a list of IP addresses and/or domains to be looked up in a particular DNS
5228 39. Added log_selector=+queue_time_overall.
5230 40. When running the queue in the test harness, wait just a tad after forking a
5231 delivery process, to get repeatability of debugging output.
5233 41. Include certificate and key file names in error message when GnuTLS fails
5234 to set them up, because the GnuTLS error message doesn't include the name
5235 of the failing file when there is a problem reading it.
5237 42. Allow both -bf and -bF in the same test run.
5239 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5241 44. The "Exiscan patch" is now merged into the mainline Exim source.
5243 45. Sometimes the final signoff response after QUIT could fail to get
5244 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5245 < 0 before doing a fflush(). This bug looks as though it goes back to the
5246 introduction of TLS in release 3.20, but "sometimes" must have been rare
5247 because the tests only now provoked it.
5249 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5250 (this can affect the format of dates).
5252 47. exim_tidydb, when checking for the continued existence of a message for
5253 which it has found a message-specific retry record, was not finding
5254 messages that were in split spool directories. Consequently, it was
5255 deleting retry records that should have stayed in existence.
5257 48. Steve fixed some bugs in eximstats.
5259 49. The SPA authentication driver was not abandoning authentication and moving
5260 on to the next authenticator when an expansion was forced to fail,
5261 contradicting the general specification for all authenticators. Instead it
5262 was generating a temporary error. It now behaves as specified.
5264 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5265 (the order specifies the preference for clients). The order is now AES256,
5266 AES128, 3DES, ARCFOUR128.
5268 51. Small patch to Sieve code - explicitly set From: when generating an
5271 52. Exim crashed if a remote delivery caused a very long error message to be
5272 recorded - for instance if somebody sent an entire SpamAssassin report back
5273 as a large number of 550 error lines. This bug was coincidentally fixed by
5274 increasing the size of one of Exim's internal buffers (big_buffer) that
5275 happened as part of the Exiscan merge. However, to be on the safe side, I
5276 have made the code more robust (and fixed the comments that describe what
5279 53. Now that there can be additional text after "Completed" in log lines (if
5280 the queue_time_overall log selector is set), a one-byte patch to exigrep
5281 was needed to allow it to recognize "Completed" as not the last thing in
5284 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5285 patch that reportedly fixes this has been added. I am not expert enough to
5286 create a test for it. This is what the patch creator wrote:
5288 "I found a little strange behaviour of ldap code when working with
5289 Windows 2003 AD Domain, where users was placed in more than one
5290 Organization Units. When I tried to give exim partial DN, the exit code
5291 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5292 But simultaneously result of request was absolutely normal ldap result,
5293 so I produce this patch..."
5295 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5296 REFERENCE, so I have modified the code to exclude the patch when that macro
5299 55. Some experimental protocols are using DNS PTR records for new purposes. The
5300 keys for these records are domain names, not reversed IP addresses. The
5301 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5302 leaves it alone. Component reversal etc. now happens only for IP addresses.
5305 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5307 57. Double the size of the debug message buffer (to 2048) so that more of very
5308 long debug lines gets shown.
5310 58. The exicyclog utility now does better if the number of log files to keep
5311 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5313 59. Two changes related to the smtp_active_hostname option:
5315 (1) $smtp_active_hostname is now available as a variable.
5316 (2) The default for smtp_banner uses $smtp_active_hostname instead
5317 of $primary_hostname.
5319 60. The host_aton() function is supposed to be passed a string that is known
5320 to be a valid IP address. However, in the case of IPv6 addresses, it was
5321 not checking this. This is a hostage to fortune. Exim now panics and dies
5322 if the condition is not met. A case was found where this could be provoked
5323 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5324 components; fortuitously, this particular loophole had already been fixed
5325 by change 4.50/55 above.
5327 If there are any other similar loopholes, the new check in host_aton()
5328 itself should stop them being exploited. The report I received stated that
5329 data on the command line could provoke the exploit when Exim was running as
5330 exim, but did not say which command line option was involved. All I could
5331 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5332 running as the user.
5335 61. There was a buffer overflow vulnerability in the SPA authentication code
5336 (which came originally from the Samba project). I have added a test to the
5337 spa_base64_to_bits() function which I hope fixes it.
5340 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5341 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5343 63. The daemon start-up calls getloadavg() while still root for those OS that
5344 need the first call to be done as root, but it missed one case: when
5345 deliver_queue_load_max is set with deliver_drop_privilege. This is
5346 necessary for the benefit of the queue runner, because there is no re-exec
5347 when deliver_drop_privilege is set.
5349 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5350 This has been fixed.
5352 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5353 was in use, was not putting the data itself into the right store pool;
5354 consequently, it could be overwritten for a subsequent message in the same
5355 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5358 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5360 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5361 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5362 the function were treating the return as a boolean value, which happened to
5363 work because 0=false and not-0=true, but is not correct code.
5365 68. The host_aton() function was not handling scoped IPv6 addresses (those
5366 with, for example, "%eth0" on the end) correctly.
5368 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5369 negated items (that is, ~something) in unsigned ints. Some compilers
5370 apparently mutter when there is no cast.
5372 70. If an address verification called from an ACL failed, and did not produce a
5373 user-specific message (i.e. there was only a "system" message), nothing was
5374 put in $acl_verify_message. In this situation, it now puts the system
5377 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5378 session; change 4.31/43 added the unwanted input to the log line - except
5379 that it did not do this in the start of session case. It now does.
5381 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5382 This is wrong and can cause the other end to generate a synchronization
5383 error if it is another Exim or anything else that does the synchronization
5384 check. A QUIT command is no longer sent after a timeout.
5386 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5387 during host lookups.
5389 74. The defer_ok option of callout verification was not working if it was used
5390 when verifying addresses in header lines, that is, for this case:
5392 verify = header_sender/callout=defer_ok
5394 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5395 those file descriptors could be used for SMTP connections. If anything
5396 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5397 could be sent to the SMTP client, causing chaos. The daemon now opens
5398 stdin, stdout, and stderr to /dev/null when it puts itself into the
5401 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5402 log by default. The user can override this with suitable Perl magic.
5404 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5405 the log message when discard triggers, was not working for the DATA ACL or
5406 for the non-SMTP ACL.
5408 78. Error message wording change in sieve.c.
5410 79. If smtp_accept_max_per_host was set, the number of connections could be
5411 restricted to fewer than expected, because the daemon was trying to set up
5412 a new connection before checking whether the processes handling previous
5413 connections had finished. The check for completed processes is now done
5414 earlier. On busy systems, this bug wouldn't be noticed because something
5415 else would have woken the daemon, and it would have reaped the completed
5418 80. If a message was submitted locally by a user whose login name contained one
5419 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5420 It caused a spool format error. I have fixed the spool reading code. A
5421 related problem was that the "from" clause in the Received: line became
5422 illegal because of the space(s). It is now covered by ${quote_local_part.
5424 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5427 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5429 83. Patch from Sieve maintainer to fix unterminated string problem in
5430 "vacation" handling.
5432 84. Some minor changes to the Linux configuration files to help with other
5433 OS variants using glibc.
5435 85. One more patch for Sieve to update vacation handling to latest spec.
5438 ----------------------------------------------------
5439 See the note above about the 4.44 and 4.50 releases.
5440 ----------------------------------------------------
5446 1. Change 4.43/35 introduced a bug that caused file counts to be
5447 incorrectly computed when quota_filecount was set in an appendfile
5450 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5451 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5454 3. Give more explanation in the error message when the command for a transport
5455 filter fails to execute.
5457 4. There are several places where Exim runs a non-Exim command in a
5458 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5459 was being done only for the command run by the queryprogram router. It is
5460 now done for all such subprocesses. The other cases are: ${run, transport
5461 filters, and the commands run by the lmtp and pipe transports.
5463 5. Some older OS have a limit of 256 on the maximum number of file
5464 descriptors. Exim was using setrlimit() to set 1000 as a large value
5465 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5466 systems. I've change it so that if it can't get 1000, it tries for 256.
5468 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5469 was an oversight, and furthermore, ever since the addition of extra
5470 controls (e.g. 4.43/32), the checks on when to allow different forms of
5471 "control" were broken. There should now be diagnostics for all cases when a
5472 control that does not make sense is encountered.
5474 7. $recipients is now available in the predata ACL (oversight).
5476 8. Tidy the search cache before the fork to do a delivery from a message
5477 received from the command line. Otherwise the child will trigger a lookup
5478 failure and thereby defer the delivery if it tries to use (for example) a
5479 cached ldap connection that the parent has called unbind on.
5481 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5482 of $address_data from the recipient verification was clobbered by the
5483 sender verification.
5485 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5486 was its contents. (It was OK if the option was not defined at all.)
5488 11. A "Completed" log line is now written for messages that are removed from
5489 the spool by the -Mrm option.
5491 12. $host_address is now set to the target address during the checking of
5492 ignore_target_hosts.
5494 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5495 being passed; this would have caused $sender_host_name to have been used if
5496 matching the list had actually called for a host name (not very likely,
5497 since this list is usually IP addresses). A host name is now passed as
5500 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5501 code that specifies a non-restarting handler (typically sigaction() in
5502 modern systems) in an attempt to fix a rare and obscure crash bug.
5504 15. Narrowed the window for a race in the daemon that could cause it to ignore
5505 SIGCHLD signals. This is not a major problem, because they are used only to
5506 wake it up if nothing else does.
5508 16. A malformed maildirsize file could cause Exim to calculate negative values
5509 for the mailbox size or file count. Odd effects could occur as a result.
5510 The maildirsize information is now recalculated if the size or filecount
5513 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5514 support for a long time. Removed HAVE_SYS_VFS_H.
5516 18. Updated exipick to current release from John Jetmore.
5518 19. Allow an empty sender to be matched against a lookup in an address list.
5519 Previously the only cases considered were a regular expression, or an
5522 20. Exim went into a mad DNS lookup loop when doing a callout where the
5523 host was specified on the transport, if the DNS lookup yielded more than
5526 21. The RFC2047 encoding function was originally intended for short strings
5527 such as real names; it was not keeping to the 75-character limit for
5528 encoded words that the RFC imposes. It now respects the limit, and
5529 generates multiple encoded words if necessary. To be on the safe side, I
5530 have increased the buffer size for the ${rfc2047: expansion operator from
5533 22. Failure to deliver a bounce message always caused it to be frozen, even if
5534 there was an errors_to setting on the router. The errors_to setting is now
5537 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5538 canonical form (fully expanded) before being placed in
5539 $sender_host_address.
5541 24. Updated eximstats to version 1.33
5543 25. Include certificate and key file names in error message when GnuTLS fails
5544 to set them up, because the GnuTLS error message doesn't include the name
5545 of the failing file when there is a problem reading it.
5547 26. Expand error message when OpenSSL has problems setting up cert/key files.
5550 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5551 (this can affect the format of dates).
5553 28. exim_tidydb, when checking for the continued existence of a message for
5554 which it has found a message-specific retry record, was not finding
5555 messages that were in split spool directories. Consequently, it was
5556 deleting retry records that should have stayed in existence.
5558 29. eximstats updated to version 1.35
5559 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5560 1.35 - bugfix such that pie charts by volume are generated correctly
5562 30. The SPA authentication driver was not abandoning authentication and moving
5563 on to the next authenticator when an expansion was forced to fail,
5564 contradicting the general specification for all authenticators. Instead it
5565 was generating a temporary error. It now behaves as specified.
5567 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5568 (the order specifies the preference for clients). The order is now AES256,
5569 AES128, 3DES, ARCFOUR128.
5571 31. Small patch to Sieve code - explicitly set From: when generating an
5574 32. Exim crashed if a remote delivery caused a very long error message to be
5575 recorded - for instance if somebody sent an entire SpamAssassin report back
5576 as a large number of 550 error lines. This bug was coincidentally fixed by
5577 increasing the size of one of Exim's internal buffers (big_buffer) that
5578 happened as part of the Exiscan merge. However, to be on the safe side, I
5579 have made the code more robust (and fixed the comments that describe what
5582 33. Some experimental protocols are using DNS PTR records for new purposes. The
5583 keys for these records are domain names, not reversed IP addresses. The
5584 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5585 leaves it alone. Component reversal etc. now happens only for IP addresses.
5588 34. The host_aton() function is supposed to be passed a string that is known
5589 to be a valid IP address. However, in the case of IPv6 addresses, it was
5590 not checking this. This is a hostage to fortune. Exim now panics and dies
5591 if the condition is not met. A case was found where this could be provoked
5592 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5593 components; fortuitously, this particular loophole had already been fixed
5594 by change 4.50/55 or 4.44/33 above.
5596 If there are any other similar loopholes, the new check in host_aton()
5597 itself should stop them being exploited. The report I received stated that
5598 data on the command line could provoke the exploit when Exim was running as
5599 exim, but did not say which command line option was involved. All I could
5600 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5601 running as the user.
5604 35. There was a buffer overflow vulnerability in the SPA authentication code
5605 (which came originally from the Samba project). I have added a test to the
5606 spa_base64_to_bits() function which I hope fixes it.
5609 36. The daemon start-up calls getloadavg() while still root for those OS that
5610 need the first call to be done as root, but it missed one case: when
5611 deliver_queue_load_max is set with deliver_drop_privilege. This is
5612 necessary for the benefit of the queue runner, because there is no re-exec
5613 when deliver_drop_privilege is set.
5615 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5616 was in use, was not putting the data itself into the right store pool;
5617 consequently, it could be overwritten for a subsequent message in the same
5618 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5621 38. Sometimes the final signoff response after QUIT could fail to get
5622 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5623 < 0 before doing a fflush(). This bug looks as though it goes back to the
5624 introduction of TLS in release 3.20, but "sometimes" must have been rare
5625 because the tests only now provoked it.
5631 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5632 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5633 Now it returns an integer. A number of calls were still expecting a T/F
5634 return. Fortuitously, in all cases, the tests worked in OK situations,
5635 which is the norm. However, things would have gone wrong on any write
5636 failures on the smtp file descriptor. This function is used when sending
5637 messages over SMTP and also when doing verify callouts.
5639 2. When Exim is called to do synchronous delivery of a locally submitted
5640 message (the -odf or -odi options), it no longer closes stderr before doing
5643 3. Implemented the mua_wrapper option.
5645 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5647 5. Implemented the functions header_remove(), header_testname(),
5648 header_add_at_position(), and receive_remove_recipient(), and exported them
5651 6. If an ACL "warn" statement specified the addition of headers, Exim already
5652 inserted X-ACL-Warn: at the start if there was no header name. However, it
5653 was not making this test for the second and subsequent header lines if
5654 there were newlines in the string. This meant that an invalid header could
5655 be inserted if Exim was badly configured.
5657 7. Allow an ACL "warn" statement to add header lines at the start or after all
5658 the Received: headers, as well as at the end.
5660 8. Added the rcpt_4xx retry error code.
5662 9. Added postmaster_mailfrom=xxx to callout verification option.
5664 10. Added mailfrom=xxxx to the callout verification option, for verify=
5667 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5668 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5670 12. Inserted some casts to stop certain compilers warning when using pointer
5671 differences as field lengths or precisions in printf-type calls (mostly
5672 affecting debugging statements).
5674 13. Added optional readline() support for -be (dynamically loaded).
5676 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5677 same clock tick as a message's arrival, so that its received time was the
5678 same as the "first fail" time on the retry record, and that message
5679 remained on the queue past the ultimate address timeout, every queue runner
5680 would try a delivery (because it was past the ultimate address timeout) but
5681 after another failure, the ultimate address timeout, which should have then
5682 bounced the address, did not kick in. This was a "< instead of <=" error;
5683 in most cases the first failure would have been in the next clock tick
5684 after the received time, and all would be well.
5686 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5687 being recognized when the domain list was tested by the match_domain
5688 condition in an expansion string.
5690 16. Added the ${str2b64: operator.
5692 17. Exim was always calling setrlimit() to set a large limit for the number of
5693 processes, without checking whether the existing limit was already
5694 adequate. (It did check for the limit on file descriptors.) Furthermore,
5695 errors from getrlimit() and setrlimit() were being ignored. Now they are
5696 logged to the main and panic logs, but Exim does carry on, to try to do its
5697 job under whatever limits there are.
5699 18. Imported PCRE 5.0.
5701 19. Trivial typo in log message " temporarily refused connection" (the leading
5704 20. If the log selector return_path_on_delivery was set and an address was
5705 redirected to /dev/null, the delivery process crashed because it assumed
5706 that a return path would always be set for a "successful" delivery. In this
5707 case, the whole delivery is bypassed as an optimization, and therefore no
5710 21. Internal re-arrangement: the function for sending a challenge and reading
5711 a response while authentication was assuming a zero-terminated challenge
5712 string. It's now changed to take a pointer and a length, to allow for
5713 binary data in such strings.
5715 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5717 23. Exim was not respecting finduser_retries when seeking the login of the
5718 uid under which it was called; it was always trying 10 times. (The default
5719 setting of finduser_retries is zero.) Also, it was sleeping after the final
5720 failure, which is pointless.
5722 24. Implemented tls_on_connect_ports.
5724 25. Implemented acl_smtp_predata.
5726 26. If the domain in control=submission is set empty, Exim assumes that the
5727 authenticated id is a complete email address when it generates From: or
5728 Sender: header lines.
5730 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5731 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5732 chown and chgrp in /bin and hostname in /usr/bin.
5734 28. Exim was keeping the "process log" file open after each use, just as it
5735 does for the main log. This opens the possibility of it remaining open for
5736 long periods when the USR1 signal hits a daemon. Occasional processlog
5737 errors were reported, that could have been caused by this. Anyway, it seems
5738 much more sensible not to leave this file open at all, so that is what now
5741 29. The long-running daemon process does not normally write to the log once it
5742 has entered its main loop, and it closes the log before doing so. This is
5743 so that log files can straightforwardly be renamed and moved. However,
5744 there are a couple of unusual error situations where the daemon does write
5745 log entries, and I had neglected to close the log afterwards.
5747 30. The text of an SMTP error response that was received during a remote
5748 delivery was being truncated at 512 bytes. This is too short for some of
5749 the long messages that one sometimes sees. I've increased the limit to
5752 31. It is now possible to make retry rules that apply only when a message has a
5753 specific sender, in particular, an empty sender.
5755 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5756 it possible to be selective about when SMTP synchronization is enforced.
5758 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5760 32. Implemented hosts_connection_nolog.
5762 33. Added an ACL for QUIT.
5764 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5767 35. Added mailbox_size and mailbox_filecount to appendfile.
5769 36. Added control = no_multiline_responses to ACLs.
5771 37. There was a bug in the logic of the code that waits for the clock to tick
5772 in the case where the clock went backwards by a substantial amount such
5773 that the microsecond fraction of "now" was more than the microsecond
5774 fraction of "then" (but the whole seconds number was less).
5776 38. Added support for the libradius Radius client library this is found on
5777 FreeBSD (previously only the radiusclient library was supported).
5783 1. When certain lookups returned multiple values in the form name=value, the
5784 quoting of the values was not always being done properly. Specifically:
5785 (a) If the value started with a double quote, but contained no whitespace,
5787 (b) If the value contained whitespace other than a space character (i.e.
5788 tabs or newlines or carriage returns) it was not quoted.
5789 This fix has been applied to the mysql and pgsql lookups by writing a
5790 separate quoting function and calling it from the lookup code. The fix
5791 should probably also be applied to nisplus, ibase and oracle lookups, but
5792 since I cannot test any of those, I have not disturbed their existing code.
5794 2. A hit in the callout cache for a specific address caused a log line with no
5795 reason for rejecting RCPT. Now it says "Previous (cached) callout
5796 verification failure".
5798 3. There was an off-by-one bug in the queryprogram router. An over-long
5799 return line was truncated at 256 instead of 255 characters, thereby
5800 overflowing its buffer with the terminating zero. As well as fixing this, I
5801 have increased the buffer size to 1024 (and made a note to document this).
5803 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5804 when Exim is waiting for an SMTP response from a remote server, Exim
5805 restarts its select() call on the socket, thereby resetting its timeout.
5806 This is not a problem when such interrupts are rare. Somebody set up a cron
5807 job to run exiwhat every 2 minutes, which is less than the normal select()
5808 timeout (5 or 10 minutes). This meant that the select() timeout never
5809 kicked in because it was always reset. I have fixed this by comparing the
5810 time when an interrupt arrives with the time at the start of the first call
5811 to select(). If more time than the timeout has elapsed, the interrupt is
5812 treated as a timeout.
5814 5. Some internal re-factoring in preparation for the addition of Sieve
5815 extensions (by MH). In particular, the "personal" test is moved to a
5816 separate function, and given an option for scanning Cc: and Bcc: (which is
5817 not set for Exim filters).
5819 6. When Exim created an email address using the login of the caller as the
5820 local part (e.g. when creating a From: or Sender: header line), it was not
5821 quoting the local part when it contained special characters such as @.
5823 7. Installed new OpenBSD configuration files.
5825 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5826 try to make them clearer.
5828 9. Callout options, other than the timeout value, were being ignored when
5829 verifying sender addresses in header lines. For example, when using
5831 verify = header_sender/callout=no_cache
5833 the cache was (incorrectly) being used.
5835 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5836 only the Cygwin environment.
5838 11. When return_path_on_delivery was set as a log selector, if different remote
5839 addresses in the same message used different return paths and parallel
5840 remote delivery occurred, the wrong values would sometimes be logged.
5841 (Whenever a remote delivery process finished, the return path value from
5842 the most recently started remote delivery process was logged.)
5844 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5845 lines when AUTH and/or TLS are in use. This is the "received protocol"
5846 field. Exim used to use "asmtp" for authenticated SMTP, without any
5847 indication (in the protocol name) for TLS use. Now it follows the RFC and
5848 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5849 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5850 names appear in log lines as well as in Received: header lines.
5852 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5853 extensions, and comparison tests, and to fix some bugs.
5855 14. Changes to the "personal" filter test:
5857 (1) The test was buggy in that it was just doing the equivalent of
5858 "contains" tests on header lines. For example, if a user's address was
5859 anne@some.where, the "personal" test would incorrectly be true for
5861 To: susanne@some.where
5863 This test is now done by extracting each address from the header in turn,
5864 and checking the entire address. Other tests that are part of "personal"
5865 are now done using regular expressions (for example, to check local parts
5866 of addresses in From: header lines).
5868 (2) The list of non-personal local parts in From: addresses has been
5869 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5870 taken from the Sieve specification recommendations.
5872 (3) If the message contains any header line starting with "List-" it is
5873 treated as non-personal.
5875 (4) The test for "circular" in the Subject: header line has been removed
5876 because it now seems ill-conceived.
5878 15. Minor typos in src/EDITME comments corrected.
5880 16. Installed latest exipick from John Jetmore.
5882 17. If headers_add on a router specified a text string that was too long for
5883 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5884 of string_sprintf() is now avoided.
5886 18. $message_body_size was not set (it was always zero) when running the DATA
5887 ACL and the local_scan() function.
5889 19. For the "mail" command in an Exim filter, no default was being set for
5890 the once_repeat time, causing a random time value to be used if "once" was
5891 specified. (If the value happened to be <= 0, no repeat happened.) The
5892 default is now 0s, meaning "never repeat". The "vacation" command was OK
5893 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5894 (I found it when inspecting the code).
5896 20. There is now an overall timeout for performing a callout verification. It
5897 defaults to 4 times the callout timeout, which applies to individual SMTP
5898 commands during the callout. The overall timeout applies when there is more
5899 than one host that can be tried. The timeout is checked before trying the
5900 next host. This prevents very long delays if there are a large number of
5901 hosts and all are timing out (e.g. when the network connections are timing
5902 out). The value of the overall timeout can be changed by specifying an
5903 additional sub-option for "callout", called "maxwait". For example:
5905 verify = sender/callout=5s,maxwait=20s
5907 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5908 to the end before writing, but this should make it even safer).
5910 22. Exim was forgetting that it had advertised PIPELINING for the second and
5911 subsequent messages on an SMTP connection. It was also not resetting its
5912 memory on STARTTLS and an internal HELO.
5914 23. When Exim logs an SMTP synchronization error within a session, it now
5915 records whether PIPELINING has been advertised or not.
5917 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5918 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5919 rather than long int.
5921 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5923 26. Added the never_mail option to autoreply.
5929 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5930 crash if the getsockname() call failed; this can happen if a connection is
5931 closed very soon after it is established. The problem was simply in the
5932 order in which certain operations were done, causing Exim to try to write
5933 to the SMTP stream before it had set up the file descriptor. The bug has
5934 been fixed by making things happen in the correct order.
5940 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5941 before the connection was closed, thus losing the rejection response.
5943 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5944 some early Solaris releases, but causes trouble in current releases where
5945 socklen_t is defined.
5947 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5950 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5953 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5954 that releasing the top of it at the end releases what was used for sub-
5955 expansions (unless the block got too big). However, discard this block if
5956 the first thing is a variable or header, so that we can use its block when
5957 it is dynamic (useful for very large $message_headers, for example).
5959 6. Lookups now cache *every* query, not just the most recent. A new, separate
5960 store pool is used for this. It can be recovered when all lookup caches are
5961 flushed. Lookups now release memory at the end of their result strings.
5962 This has involved some general refactoring of the lookup sources.
5964 7. Some code has been added to the store_xxx() functions to reduce the amount
5965 of flapping under certain conditions.
5967 8. log_incoming_interface used to affect only the <= reception log lines. Now
5968 it causes the local interface and port to be added to several more SMTP log
5969 lines, for example "SMTP connection from", and rejection lines.
5971 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5973 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5975 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5976 could be overwritten at the end of the current message (or the start of a
5977 new message if it was set in a HELO ACL). The value is now preserved for
5978 the duration of the SMTP connection.
5980 12. If a transport had a headers_rewrite setting, and a matching header line
5981 contained an unqualified address, that address was qualified, even if it
5982 did not match any rewriting rules. The underlying bug was that the values
5983 of the flags that permit the existence of unqualified sender and recipient
5984 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5985 non-local messages, and by -bnq for local messages) were not being
5986 preserved with the message after it was received.
5988 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5989 "next input=" as part of the text comprising the host identity instead of
5990 the correct text. The code was using the same buffer for two different
5991 strings. However, depending on which order the printing function evaluated
5992 its arguments, the bug did not always show up. Under Linux, for example, my
5993 test suite worked just fine.
5995 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5996 doesn't work with some older versions of Perl. It has been changed to "my",
5997 which in any case is probably the better facility to use.
5999 15. A really picky compiler found some instances of statements for creating
6000 error messages that either had too many or two few arguments for the format
6003 16. The size of the buffer for calls to the DNS resolver has been increased
6004 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6005 for addresses that have a lot of PTR records. This alleviates a problem; it
6006 does not fully solve it.
6008 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6009 buffer now truncates the list and logs the incident, which is the same
6010 action as happens when Exim is looking up a host name and its aliases.
6011 Previously in this situation something unpredictable would happen;
6012 sometimes it was "internal error: store_reset failed".
6014 18. If a server dropped the connection unexpectedly when an Exim client was
6015 using GnuTLS and trying to read a response, the client delivery process
6016 crashed while trying to generate an error log message.
6018 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6019 string, for example:
6021 warn message = H1: something\nH2: something
6023 the text was added as a single header line from Exim's point of view
6024 though it ended up OK in the delivered message. However, searching for the
6025 second and subsequent header lines using $h_h2: did not work. This has been
6026 fixed. Similarly, if a system filter added multiple headers in this way,
6027 the routers could not see them.
6029 20. Expanded the error message when iplsearch is called with an invalid key to
6030 suggest using net-iplsearch in a host list.
6032 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6033 ACLs are no longer actually imposed (and a message to that effect is
6036 22. If a "gecos" field in a passwd entry contained escaped characters, in
6037 particular, if it contained a \" sequence, Exim got it wrong when building
6038 a From: or a Sender: header from that name. A second bug also caused
6039 incorrect handling when an unquoted " was present following a character
6040 that needed quoting.
6042 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6043 was not being matched caselessly.
6045 24. Arranged for all hyphens in the exim.8 source to be escaped with
6048 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6049 properly. Recipient callout cache records were still being keyed to include
6050 the sender, even when use_sender was set false. This led to far more
6051 callouts that were necessary. The sender is no longer included in the key
6052 when use_sender is false.
6054 26. Added "control = submission" modifier to ACLs.
6056 27. Added the ${base62d: operator to decode base 62 numbers.
6058 28. dnsdb lookups can now access SRV records.
6060 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6061 the configuration file.
6063 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6064 (-v) mode. This makes the output for a verbose queue run more intelligible.
6066 31. Added a use_postmaster feature to recipient callouts.
6068 32. Added the $body_zerocount variable, containing the number of binary zero
6069 bytes in the message body.
6071 33. The time of last modification of the "new" subdirectory is now used as the
6072 "mailbox time last read" when there is a quota error for a maildir
6075 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6077 35. Added +ignore_unknown as a special item in host lists.
6079 36. Code for decoding IPv6 addresses in host lists is now included, even if
6080 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6081 address was recognized as an IP address, but was then not correctly decoded
6082 into binary, causing unexpected and incorrect effects when compared with
6089 1. Very minor rewording of debugging text in manualroute to say "list of
6090 hosts" instead of "hostlist".
6092 2. If verify=header_syntax was set, and a header line with an unqualified
6093 address (no domain) and a large number of spaces between the end of the
6094 name and the colon was received, the reception process suffered a buffer
6095 overflow, and (when I tested it) crashed. This was caused by some obsolete
6096 code that should have been removed. The fix is to remove it!
6098 3. When running in the test harness, delay a bit after writing a bounce
6099 message to get a bit more predictability in the log output.
6101 4. Added a call to search_tidyup() just before forking a reception process. In
6102 theory, someone could use a lookup in the expansion of smtp_accept_max_
6103 per_host which, without the tidyup, could leave open a database connection.
6105 5. Added the variables $recipient_data and $sender_data which get set from a
6106 lookup success in an ACL "recipients" or "senders" condition, or a router
6107 "senders" option, similar to $domain_data and $local_part_data.
6109 6. Moved the writing of debug_print from before to after the "senders" test
6112 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6113 problems for message scanning, either using a data ACL, or using
6114 local_scan() because the Received: header was not generated till after they
6115 were called (in order to set the time as the time of reception completion).
6116 I have revised the way this works. The header is now generated after the
6117 body is received, but before the ACL or local_scan() are called. After they
6118 are run, the timestamp in the header is updated.
6124 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6125 before starting a queue runner without re-exec. This happened only when
6126 deliver_drop_privilege was set or when the Exim user was set to root. The
6127 effect of the bug was that timeouts during subsequent deliveries caused
6128 crashes instead of being properly handled. The handler is now left at its
6129 default (and expected) setting.
6131 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6132 message, again when deliver_drop_privilege is set or Exim is run as root.
6133 The bug described in (1) was not present in this case, but the tidying up
6134 of the other signals was missing. I have made the two cases consistent.
6136 3. The ignore_target_hosts setting on a manualroute router was being ignored
6137 for hosts that were looked up using the /MX notation.
6139 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6142 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6143 operated on the sender address. After changing the $sender_address to <>
6144 for the sender address verify, Exim was re-instated it as the original
6145 (before rewriting) address, but remembering that it had rewritten it, so it
6146 wasn't rewriting it again. This bug also had the effect of breaking the
6147 sender address verification caching when the sender address was rewritten.
6149 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6150 This has been changed so that if the ip literal address matches
6151 ignore_target_hosts, the router declines.
6153 7. Added expansion conditions match_domain, match_address, and match_local_
6154 part (NOT match_host).
6156 8. The placeholder for the Received: header didn't have a length field set.
6158 9. Added code to Exim itself and to exim_lock to test for a specific race
6159 condition that could lead to file corruption when using MBX delivery. The
6160 issue is with the lockfile that is created in /tmp. If this file is removed
6161 after a process has opened it but before that process has acquired a lock,
6162 there is the potential for a second process to recreate the file and also
6163 acquire a lock. This could lead to two Exim processes writing to the file
6164 at the same time. The added code performs the same test as UW imapd; it
6165 checks after acquiring the lock that its file descriptor still refers to
6166 the same named file.
6168 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6169 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6172 11. Added the smtp_active_hostname option. If used, this will typically be made
6173 to depend on the incoming interface address. Because $interface_address is
6174 not set up until the daemon has forked a reception process, error responses
6175 that can happen earlier (such as "too many connections") no longer contain
6178 12. If an expansion in a condition on a "warn" statement fails because a lookup
6179 defers, the "warn" statement is abandoned, and the next ACL statement is
6180 processed. Previously this caused the whole ACL to be aborted.
6182 13. Added the iplsearch lookup type.
6184 14. Added ident_timeout as a log selector.
6186 15. Added tls_certificate_verified as a log selector.
6188 16. Added a global option tls_require_ciphers (compare the smtp transport
6189 option of the same name). This controls incoming TLS connections.
6191 17. I finally figured out how to make tls_require_ciphers do a similar thing
6192 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6193 before starting the TLS session.
6195 18. Tabs are now shown as \t in -bP output.
6197 19. If the log selector return_path_on_delivery was set, Exim crashed when
6198 bouncing a message because it had too many Received: header lines.
6200 20. If two routers both had headers_remove settings, and the first one included
6201 a superfluous trailing colon, the final name in the first list and the
6202 first name in the second list were incorrectly joined into one item (with a
6203 colon in the middle).
6209 1. Added -C and -D options to the exinext utility, mainly to make it easier
6210 to include in the automated testing, but these could be helpful when
6211 multiple configurations are in use.
6213 2. The exinext utility was not formatting the output nicely when there was
6214 an alternate port involved in the retry record key, nor when there was a
6215 message id as well (for retries that were specific to a specific message
6216 and a specific host). It was also confused by IPv6 addresses, because of
6217 the additional colons they contain. I have fixed the IPv4 problem, and
6218 patched it up to do a reasonable job for IPv6.
6220 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6221 delivery, the log line now contains "pipelined" if PIPELINING was used.
6223 4. An SMTP transport process used to panic and die if the bind() call to set
6224 an explicit outgoing interface failed. This has been changed; it is now
6225 treated in the same way as a connect() failure.
6227 5. A reference to $sender_host_name in the part of a conditional expansion
6228 that was being skipped was still causing a DNS lookup. This no longer
6231 6. The def: expansion condition was not recognizing references to header lines
6232 that used bh_ and bheader_.
6234 7. Added the _cache feature to named lists.
6236 8. The code for checking quota_filecount in the appendfile transport was
6237 allowing one more file than it should have been.
6239 9. For compatibility with Sendmail, the command line option
6247 and sets the incoming protocol and host name (for trusted callers). The
6248 host name and its colon can be omitted when only the protocol is to be set.
6249 Note the Exim already has two private options, -pd and -ps, that refer to
6250 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6251 "s", but I don't think that's a major issue.
6253 10. A number of refactoring changes to the code, none of which should affect
6256 (a) The number of logging options was getting close to filling up the
6257 32-bit word that was used as a bit map. I have split them into two classes:
6258 those that are passed in the argument to log_write(), and those that are
6259 only ever tested independently outside of that function. These are now in
6260 separate 32-bit words, so there is plenty of room for expansion again.
6261 There is no change in the user interface or the logging behaviour.
6263 (b) When building, for example, log lines, the code previously used a
6264 macro that called string_cat() twice, in order to add two strings. This is
6265 not really sufficiently general. Furthermore, there was one instance where
6266 it was actually wrong because one of the argument was used twice, and in
6267 one call a function was used. (As it happened, calling the function twice
6268 did not affect the overall behaviour.) The macro has been replaced by a
6269 function that can join an arbitrary number of extra strings onto a growing
6272 (c) The code for expansion conditions now uses a table and a binary chop
6273 instead of a serial search (which was left over from when there were very
6274 few conditions). Also, it now recognizes conditions like "pam" even when
6275 the relevant support is not compiled in: a suitably worded error message is
6276 given if an attempt is made to use such a condition.
6278 11. Added ${time_interval:xxxxx}.
6280 12. A bug was causing one of the ddress fields not to be passed back correctly
6281 from remote delivery subprocesses. The field in question was not being
6282 subsequently used, so this caused to problems in practice.
6284 13. Added new log selectors queue_time and deliver_time.
6286 14. Might have fixed a bug in maildirsizefile handling that threw up
6287 "unexpected character" debug warnings, and recalculated the data
6288 unnecessarily. In any case, I expanded the warning message to give more
6291 15. Added the message "Restricted characters in address" to the statements in
6292 the default ACL that block characters like @ and % in local parts.
6294 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6295 Three changes have been made:
6297 (a) There was a serious bug; a negative response to MAIL caused the whole
6298 recipient domain to be cached as invalid, thereby blocking all messages
6299 to all local parts at the same domain, from all senders. This bug has
6300 been fixed. The domain is no longer cached after a negative response to
6301 MAIL if the sender used is not empty.
6303 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6306 (c) A new callout option, "use_sender" has been added for people who want
6307 the modified behaviour.
6313 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6316 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6317 indeed breaks things for older releases.
6319 3. Added additional logging to the case where there is a problem reading data
6320 from a filter that is running in a subprocess using a pipe, in order to
6321 try to track down a specific problem.
6323 4. Testing facility fudge: when running in the test harness and attempting
6324 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6325 getting "No route to host". Convert this to a timeout.
6327 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6330 6. Some OS don't have socklen_t but use size_t instead. This affects the
6331 fifth argument of getsockopt() amongst other things. This is now
6332 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6333 can be set for individual OS. I have set it for SunOS5, OSF1, and
6334 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6335 some earlier ones do not.
6337 7. Change 4.30/15 was not doing the test caselessly.
6339 8. The standard form for an IPv6 address literal was being rejected by address
6340 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6341 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6342 this, as well as the form without the "IPv6" on the front (but only when
6343 address literals are enabled, of course).
6345 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6347 10. Exim crashed if a message with an empty sender address specified by -f
6348 encountered a router with an errors_to setting. This could be provoked only
6349 by a command such as
6353 where an empty string was supplied; "<>" did not hit this bug.
6355 11. Installed PCRE release 4.5.
6357 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6358 remained set. It is now erased.
6360 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6361 times from message ids (which are base 36 rather than the normal 62).
6363 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6364 were being counted as actual protocol errors, and logged if the log
6365 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6366 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6367 and DATA following a set of rejected RCPTs do not count as protocol errors.
6368 In other words, Exim assumes they were pipelined, though this may not
6369 actually be the case. Of course, in all cases the client gets an
6370 appropriate error code.
6372 15. If a lookup fails in an ACL condition, a message about the failure may
6373 be available; it is used if testing the ACL cannot continue, because most
6374 such messages specify what the cause of the deferral is. However, some
6375 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6376 that caused an old message to be retained and used if a later statement
6377 caused a defer, replacing the real cause of the deferral.
6379 16. If an IP address had so many PTR records that the DNS lookup buffer
6380 was not large enough to hold them, Exim could crash while trying to process
6381 the truncated data. It now detects and logs this case.
6383 17. Further to 4.21/58, another change has been made: if (and only if) the
6384 first line of a message (the first header line) ends with CRLF, a bare LF
6385 in a subsequent header line has a space inserted after it, so as not to
6386 terminate the header.
6388 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6389 unnecessarily, used atoi() instead of strtol(), and didn't check the
6390 termination when getting file sizes from file names by regex.
6392 19. Completely re-implemented the support for maildirsize files, in the light
6393 of a number of problems with the previous contributed implementation
6394 (4.30/29). In particular:
6396 . If the quota is zero, the maildirsize file is maintained, but no quota is
6399 . If the maildir directory does not exist, it is created before any attempt
6400 to write a maildirsize file.
6402 . The quota value in the file is just a cache; if the quota is changed in
6403 the transport, the new value overrides.
6405 . A regular expression is available for excluding directories from the
6408 20. The autoreply transport checks the characters in options that define the
6409 message's headers; it allows continued headers, but it was checking with
6410 isspace() after an embedded newline instead of explicitly looking for a
6413 21. If all the "regular" hosts to which an address was routed had passed their
6414 expiry times, and had not reached their retry times, the address was
6415 bounced, even if fallback hosts were defined. Now Exim should go on to try
6418 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6419 equivalent code in the SMTP transport. Some hosts send humungous responses
6420 to HELO/EHLO, more than 1024 it seems.
6422 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6423 gives compiler warnings in some environments. I've now done it "properly",
6426 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6427 (because of problems with the built-in one) was declared to return uschar *
6428 instead of char *, causing compiler failure.
6430 25. Fixed a file descriptor leak when processing alias/forward files.
6432 26. Fixed a minor format string issue in dbfn.c.
6434 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6436 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6437 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6440 29. When a sender address is verified, it is cached, to save repeating the test
6441 when there is more than one recipient in a message. However, when the
6442 verification involves a callout, it is possible for different callout
6443 options to be set for different recipients. It is too complicated to keep
6444 track of this in the cache, so now Exim always runs a verification when a
6445 callout is required, relying on the callout cache for the optimization.
6446 The overhead is duplication of the address routing, but this should not be
6449 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6450 to be verified with callout=postmaster, and the main callout worked but the
6451 postmaster check failed, the verification correctly failed. However, if a
6452 subsequent RCPT command asked for sender verification *without* the
6453 postmaster check, incorrect caching caused this verification also to fail,
6456 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6457 it was not caching the DNS options (qualify_single, search_parents) that
6458 were used when the lookup failed. A subsequent lookup with different
6459 options therefore always gave the same answer, though there were cases
6460 where it should not have. (Example: a "domains = !$mx_any" option on a
6461 dnslookup router: the "domains" option is always processed without any
6462 widening, but the router might have qualify_single set.) Now Exim uses the
6463 cached value only when the same options are set.
6465 32. Added John Jetmore's "exipick" utility to the distribution.
6467 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6468 than a timeout (e.g. a certificate is required, and is not provided), an
6469 Exim server now closes the connection immediately. Previously it waited for
6470 the client to close - but if the client is SSL, it seems that they each
6471 wait for each other, leading to a delay before one of them times out.
6473 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6474 maintained 0.8.x compatibility because I don't think many are using it, and
6475 it is clearly obsolete.
6477 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6480 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6481 client certificate was expired. A simple patch fixes this, though I don't
6482 understand the full logic of why the verify callback is called multiple
6485 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6486 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6487 which causes problems with some clients (such as the Certicom SSL Plus
6488 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6489 disables the coutermeasure allowing Eudora to connect."
6491 38. Exim was not checking that a write() to a log file succeeded. This could
6492 lead to Bad Things if a log got too big, in particular if it hit a file
6493 size limit. Exim now panics and dies if it cannot write to a log file, just
6494 as it does if it cannot open a log file.
6496 39. Modified OS/Makefile-Linux so that it now contains
6498 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6500 The two -D definitions ensure that Exim is compiled with large file
6501 support, which makes it possible to handle log files that are bigger than
6504 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6505 instance) a domain was checked against a named list that involved a lookup,
6506 causing $domain_data to be set, then another domain was checked against the
6507 same list, then the first domain was re-checked, the value of $domain_data
6508 after the final check could be wrong. In particular, if the second check
6509 failed, it could be set empty. This bug probably also applied to
6512 41. The strip_trailing_dot option was not being applied to the address given
6513 with the -f command-line option.
6515 42. The code for reading a message's header from the spool was incrementing
6516 $received_count, but never initializing it. This meant that the value was
6517 incorrect (doubled) while delivering a message in the same process in which
6518 it was received. In the most common configuration of Exim, this never
6519 happens - a fresh exec is done - but it can happen when
6520 deliver_drop_privilege is set.
6522 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6523 it now includes up to 150 characters of the unexpected data in the log
6526 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6527 and building data strings. The size of both of these buffers was 10 000
6528 bytes - far larger than anybody would *ever* want, thought I. Needless to
6529 say, somebody hit the limit. I have increased the maximum line length to
6530 20 000 and the maximum data length of concatenated lines to 100 000. I have
6531 also fixed two bugs, because there was no checking on these buffers. Tsk,
6532 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6533 buffer is too small.
6535 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6536 lsearch lookups. Now it does.
6538 46. When parsing a route_list item in a manualroute router, a fixed-length
6539 buffer was used for the list of hosts. I made this 1024 bytes long,
6540 thinking that nobody would ever have a list of hosts that long. Wrong.
6541 Somebody had a whole pile of complicated expansion conditions, and the
6542 string was silently truncated, leading to an expansion error. It turns out
6543 that it is easier to change to an unlimited length (owing to other changes
6544 that have happened since this code was originally written) than to build
6545 structure for giving a limitation error. The length of the item that
6546 expands into the list of hosts is now unlimited.
6548 47. The lsearch lookup could not handle data where the length of text line was
6549 more than 4095 characters. Such lines were truncated, leading to shortened
6550 data being returned. It should now handle lines of any length.
6552 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6553 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6556 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6557 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6558 no longer happens in comment lines. A list of replacements is now placed
6559 at the head of all of the source files, except those whose only change is
6560 to replace PERL_COMMAND in the very first #! line.
6562 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6563 messages on the queue, with a bottom-up merge sort, using code contributed
6564 by Michael Haardt. This should make operations like -bp somewhat faster on
6565 large queues. It won't affect queue runners, except when queue_run_in_order
6568 51. Installed eximstats 1.31 in the distribution.
6570 52. Added support for SRV lookups to the dnslookup router.
6572 53. If an ACL referred to $message_body or $message_body_end, the value was not
6573 reset for any messages that followed in the same SMTP session.
6575 54. The store-handling optimization for building very long strings was not
6576 differentiating between the different store pools. I don't think this
6577 actually made any difference in practice, but I've tidied it.
6579 55. While running the routers to verify a sender address, $sender_address
6580 was still set to the sender address. This is wrong, because when routing to
6581 send a bounce to the sender, it would be empty. Therefore, I have changed
6582 it so that, while verifying a sender address, $sender_address is set to <>.
6583 (There is no change to what happens when verifying a recipient address.)
6585 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6586 target A or AAAA records (if not already returned) without resetting the
6587 qualify_single or search_parents options of the DNS resolver. These are
6588 inappropriate in this case because the targets of MX and SRV records must
6589 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6590 target that, when qualified, matched something in the local domain. These
6591 two options are now turned off when doing these lookups.
6593 57. It seems that at least some releases of Reiserfs (which does not have the
6594 concept of a fixed number of inodes) returns zero and not -1 for the
6595 number of available inodes. This interacted badly with check_spool_inodes,
6596 which assumed that -1 was the "no such thing" setting. What I have done is
6597 to check that the total number of inodes is greater than zero before doing
6598 the test of how many are available.
6600 58. When a "warn" ACL statement has a log_message modifier, the message is
6601 remembered, and not repeated. This is to avoid a lot of repetition when a
6602 message has many recipients that cause the same warning to be written.
6603 However, Exim was preserving the list of already written lines for an
6604 entire SMTP session, which doesn't seem right. The memory is now reset if a
6605 new message is started.
6607 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6608 debugging output unless log_rewrite was also set.
6610 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6611 of (int)(handle) when we know that handle contains (void *)(-1).
6613 61. The Exim daemon panic-logs an error return when it closes the incoming
6614 connection. However "connection reset by peer" seems to be common, and
6615 isn't really an error worthy of noting specially, so that particular error
6618 62. When Exim is trying to find all the local interfaces, it used to panic and
6619 die if the ioctl to get the interface flags failed. However, it seems that
6620 on at least one OS (Solaris 9) it is possible to have an interface that is
6621 included in the list of interfaces, but for which you get a failure error
6622 for this call. This happens when the interface is not "plumbed" into a
6623 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6624 failure of the "get flags" call assumes that the interface is down.
6626 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6627 makes life easier for people who are doing arithmetic on fields extracted
6628 from dates, where you often get leading zeros that should not be
6629 interpreted as octal.
6631 64. Added qualify_domain to the redirect router, to override the global
6634 65. If a pathologically long header line contained very many addresses (the
6635 report of this problem mentioned 10 000) and each of them was rewritten,
6636 Exim could use up a very large amount of memory. (It kept on making new
6637 copies of the header line as it rewrote, and never released the old ones.)
6638 At the expense of a bit more processing, the header rewriting function has
6639 been changed so that it no longer eats memory in this way.
6641 66. The generation of the Received: header has been moved from the time that a
6642 message starts to be received, to the time that it finishes. The timestamp
6643 in the Received: header should now be very close to that of the <= log
6644 line. There are two side-effects of this change:
6646 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6647 logged header lines no longer include the local Received: line, because
6648 it has not yet been created. The same applies to a copy of the message
6649 that is returned to a non-SMTP sender when a message is rejected.
6651 (b) When a filter file is tested using -bf, no additional Received: header
6652 is added to the test message. After some thought, I decided that this
6655 This change does not affect the value of $received_for. It is still set
6656 after address rewriting, but before local_scan() is called.
6658 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6660 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6661 gave an unhelpful panic error message, and a defer error. I have managed to
6662 change this behaviour so that it now rejects any supplied certificate,
6663 which seems right, as the list of acceptable certificates is empty.
6665 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6666 gave an unhelpful defer error. I have not managed to make this reject any
6667 supplied certificates, but the error message it gives is "no certificate
6668 supplied", which is not helpful.
6670 70. exigrep's output now also includes lines that are not associated with any
6671 message, but which match the given pattern. Implemented by a patch from
6672 Martin Sluka, which also tidied up the Perl a bit.
6674 71. Recipient callout verification, like sender verification, was using <> in
6675 the MAIL FROM command. This isn't really the right thing, since the actual
6676 sender may affect whether the remote host accepts the recipient or not. I
6677 have changed it to use the actual sender in the callout; this means that
6678 the cache record is now keyed on a recipient/sender pair, not just the
6679 recipient address. There doesn't seem to be a real danger of callout loops,
6680 since a callout by the remote host to check the sender would use <>.
6681 [SEE ABOVE: changed after hitting problems.]
6683 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6684 temporary errors. However, in the case of such a code being given after
6685 the end of a data transmission (i.e. after ".") Exim was failing to write
6686 a retry record for the message. (Yes, there was some broken host that was
6687 actually sending 8xx at this point.)
6689 73. An unknown lookup type in a host list could cause Exim to panic-die when
6690 the list was checked. (An example that provoked this was putting <; in the
6691 middle of a list instead of at the start.) If this happened during a DATA
6692 ACL check, a -D file could be left lying around. This kind of configuration
6693 error no longer causes Exim to die; instead it causes a defer error. The
6694 incident is still logged to the main and panic logs.
6696 74. Buglet left over from Exim 3 conversion. The message "too many messages
6697 in one connection" was written to the rejectlog but not the mainlog, except
6698 when address rewriting (yes!) was being logged.
6700 75. Added write_rejectlog option.
6702 76. When a system filter was run not as root (that is, when system_filter_user
6703 was set), the values of the $n variables were not being returned to the
6704 main process; thus, they were not subsequently available in the $sn
6707 77. Added +return_path_on_delivery log selector.
6709 78. A connection timeout was being treated differently from recipients deferred
6710 when testing hosts_max_try with a message that was older than the host's
6711 retry timeout. (The host should not be counted, thus allowing all hosts to
6712 be tried at least once before bouncing.) This may have been the cause of an
6713 occasionally reported bug whereby a message would remain on the queue
6714 longer than the retry timeout, but would be bounced if a delivery was
6715 forced. I say "may" because I never totally pinned down the problem;
6716 setting up timeout/retry tests is difficult. See also the next item.
6718 79. The ultimate address timeout was not being applied to errors that involved
6719 a combination of host plus message (for example, a timeout on a MAIL
6720 command). When an address resolved to a number of possible hosts, and they
6721 were not all tried for each delivery (e.g. because of hosts_max_try), a
6722 message could remain on the queue longer than the retry timeout.
6724 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6727 81. Fixed an obscure SMTP outgoing bug which required at least the following
6728 conditions: (a) there was another message waiting for the same server;
6729 (b) the server returned 5xx to all RCPT commands in the first message so
6730 that the message was not completed; (c) the server dropped the connection
6731 or gave a negative response to the RSET that Exim sends to abort the
6732 transaction. The observed case was a dropped connection after DATA that had
6733 been sent in pipelining mode. That is, the server had advertised PIPELINING
6734 but was not implementing it correctly. The effect of the bug was incorrect
6735 behaviour, such as trying another host, and this could lead to a crash.
6741 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6742 and daemon.c were passed as pointers to ints; they should have been
6743 pointers to socklen_t variables (which are typically unsigned ints).
6745 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6748 3. Fixed a really odd bug that affected only the testing scheme; patching a
6749 certain fixed string in the binary changed the value of another string that
6750 happened to be identical to the end of the original first string.
6752 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6753 name", it returns that address as the IP address. On some operating
6754 systems (e.g. Solaris), it also passes back the IP address string as the
6755 "host name". However, on others (e.g. Linux), it passes back an empty
6756 string. Exim wasn't checking for this, and was changing the host name to an
6757 empty string, assuming it had been canonicalized.
6759 5. Although rare, it is permitted to have more than one PTR record for a given
6760 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6761 all the names associated with an address, because they do in Solaris.
6762 However, it seems that they do not in Linux for data that comes from the
6763 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6764 I found this out when I moved to a new Linux workstation and tried to run
6765 the Exim test suite.
6767 To get round this problem I have changed the code so that it now does its
6768 own call to the DNS to look up PTR records when searching for a host name.
6769 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6770 addresses that are only in /etc/hosts are still found.
6772 This behaviour is, however, controlled by an option called host_lookup_
6773 order, which defaults to "bydns:byaddr". If people want to use the other
6774 order, or indeed, just use one or the other means of lookup, they can
6775 specify it in this variable.
6777 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6778 some operating systems, this comes back from gethostbyaddr() as an empty
6779 string, and this is what Exim used to test for. However, it seems that in
6780 other systems, "." is yielded. Exim now tests for this case too.
6782 7. The values of check_spool_space and check_log_space are now held internally
6783 as a number of kilobytes instead of an absolute number of bytes. If a
6784 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6785 kilobyte. This means that much larger values can be stored.
6787 8. Exim monitor: an attempt to get the action menu when not actually pointing
6788 at a message produces an empty menu entitled "No message selected". This
6789 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6790 no entries in it ("Shell widget menu has zero width and/or height"). So I
6791 have added a single, blank menu entry in this case.
6793 9. Added ${quote_local_part.
6795 10. MIME decoding is now applied to the contents of Subject: header lines when
6798 11. Now that a reference to $sender_host_address automatically causes a reverse
6799 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6800 host lookup before query-style lookups in lists that might use this
6801 variable. This has therefore been abolished, and the "net-" prefix is no
6802 longer necessary for query-style lookups.
6804 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6805 have been a typo for LFLAGS, so it has been changed.
6807 13. The install script calls Exim with "-C /dev/null" in order to find the
6808 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6809 to be output. However, since Exim outputs its version number before the
6810 error, it didn't break the script. It just looked ugly. I fixed this by
6811 always allowing "-C /dev/null" if the caller is root.
6813 14. Ignore overlarge ACL variable number when reading spool file - insurance
6814 against a later release with more variables having written the file.
6816 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6817 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6818 this, as well as the form without the "IPv6" on the front.
6820 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6821 OS/Makefile-Darwin file.
6823 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6824 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6826 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6827 variable. However, some OS use ints for inodes. I've added cast to long int
6828 to get rid of the compiler warning.
6830 19. I had forgotten to lock out "/../" in configuration file names when
6831 ALT_CONFIG_PREFIX was set.
6833 20. Routers used for verification do not need to specify transports. However,
6834 if such a router generated a host list, and callout was configured, Exim
6835 crashed, because it could not find a port number from the (non-existent)
6836 transport. It now assumes port 25 in this circumstance.
6838 21. Added the -t option to exigrep.
6840 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6841 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6842 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6843 them is set, LOOKUP_LSEARCH is forced.
6845 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6847 24. Added sender and host information to the "rejected by local_scan()" log
6848 line; previously there was no indication of these.
6850 25. Added .include_if_exists.
6852 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6853 Linux. It turns out that not all file systems support this. Apparently some
6854 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6855 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6856 not supported on the file descriptor, is now ignored when Exim is trying to
6857 sync a directory. This applies only to Linux.
6859 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6861 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6862 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6865 29. Added support for maildirsize files from supplied patch (modified a bit).
6867 30. The use of :fail: followed by an empty string could lead Exim to respond to
6868 sender verification failures with (e.g.):
6870 550 Verification failed for <xxx>
6871 550 Sender verify failed
6873 where the first response line was missing the '-' that indicates it is not
6874 the final line of the response.
6876 31. The loop for finding the name of the user that called Exim had a hardwired
6877 limit of 10; it now uses the value of finduser_retries, which is used for
6878 all other user lookups.
6880 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6883 33. Exim was neglecting to zero errno before one call of strtol() when
6884 expanding a string and expecting an integer value. On some systems this
6885 resulted in spurious "integer overflow" errors. Also, it was casting the
6886 result into an int without checking.
6888 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6889 did not work. The code looks as if it has *never* worked, though it appears
6890 to have been documented since at least release 1.62. I have made it work.
6892 35. The "timeout_DNS" error in retry rules, also documented since at least
6893 1.62, also never worked. As it isn't clear exactly what this means, and
6894 clearly it isn't a major issue, I have abolished the feature by treating it
6895 as "timeout", and writing a warning to the main and panic logs.
6897 36. The display of retry rules for -brt wasn't always showing the error code
6900 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6901 timeout_connect_A, timeout_connect_MX.
6903 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6904 to the empty sender.
6906 39. The daemon was not analysing the content of -oX till after it had closed
6907 stderr and disconnected from the controlling terminal. This meant that any
6908 syntax errors were only noted on the panic log, and the return code from
6909 the command was 0. By re-arranging the code a little, I've made the
6910 decoding happen first, so such errors now appear on stderr, and the return
6911 code is 1. However, the actual setting up of the sockets still happens in
6912 the disconnected process, so errors there are still only recorded on the
6915 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6916 connections (as happens on some IP stacks) was logged at start up time as
6917 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6918 it from "IPv6 and IPv4", which means that two separate sockets are being
6921 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6922 says whether AF_INET or AF_INET6 was passed as an argument.
6924 42. Exiwhat output was messed up when time zones were included in log
6927 43. Exiwhat now gives more information about the daemon's listening ports,
6928 and whether -tls-on-connect was used.
6930 44. The "port" option of the smtp transport is now expanded.
6932 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6933 silently ignored. Now an error message is written to the main and panic
6936 46. There's a new ACL modifier called "logwrite" which writes to a log file
6937 as soon as it is encountered.
6939 47. Added $local_user_uid and $local_user_gid at routing time.
6941 48. Exim crashed when trying to verify a sender address that was being
6944 49. Exim was recognizing only a space character after ".include". It now also
6945 recognizes a tab character.
6947 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6948 extracting the relevant information from the specification. The man page no
6949 longer contains scrambled data for the -d option, and I've added a section
6950 at the front about calling Exim under different names.
6952 51. Added "extra_headers" argument to the "mail" command in filter files.
6954 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6957 53. Installed eximstats 1.29.
6959 54. Added transport_filter_timeout as a generic transport option.
6961 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6962 Cc: header lines. This was required by RFC 822, but it not required by RFC
6965 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6966 incoming messages that did not have them. Now it does so only if the
6967 message originates locally, that is, if there is no associated remote host
6968 address. When Resent- header lines are present, this applies to the Resent-
6969 lines rather than the non-Resent- lines.
6971 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6972 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6974 58. Messages for configuration errors now include the name of the main
6975 configuration file - useful now that there may be more than one file in a
6976 list (.included file names were always shown).
6978 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6979 for those rare installations that do not start the daemon as root or run it
6980 setuid root. I've cut out the call to initgroups() if the daemon is not
6983 60. The Exim user and group can now be bound into the binary as text strings
6984 that are looked up at the start of Exim's processing.
6986 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6988 62. Added $mailstore_basename variable.
6990 63. Installed patch to sieve.c from Michael Haardt.
6992 64. When Exim failed to open the panic log after failing to open the main log,
6993 the original message it was trying to log was written to stderr and debug
6994 output, but if they were not available (the usual case in production), it
6995 was lost. Now it is written to syslog before the two lines that record the
6996 failures to open the logs.
6998 65. Users' Exim filters run in subprocesses under the user's uid. It is
6999 possible for a "deliver" command or an alias in a "personal" command to
7000 provoke an address rewrite. If logging of address rewriting is configured,
7001 this fails because the process is not running as root or exim. There may be
7002 a better way of dealing with this, but for the moment (because 4.30 needs
7003 to be released), I have disabled address rewrite logging when running a
7004 filter in a non-root, non-exim process.
7010 1. The buildconfig auxiliary program wasn't quoting the value set for
7011 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7012 not defined. This bug was masked in 4.22 by the effect that was fixed in
7015 2. Some messages that were rejected after a message id was allocated were
7016 shown as "incomplete" by exigrep. It no longer does this for messages that
7017 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7019 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7020 have allow_domain_literals set, the ID did not get logged in the <= line.
7021 Domain literals are now always recognized in Message-ID: header lines.
7023 4. The first argument for a ${extract expansion item is the key name or field
7024 number. Leading and trailing spaces in this item were not being ignored,
7025 causing some misleading effects.
7027 5. When deliver_drop_privilege was set, single queue runner processes started
7028 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7029 same command in the process it spins off) were not dropping privilege.
7031 6. When the daemon running as "exim" started a queue runner, it always
7032 re-executed Exim in the spun-off process. This is a waste of effort when
7033 deliver_drop_privilege is set. The new process now just calls the
7034 queue-runner function directly.
7040 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7043 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7044 ignored. Though the use of -oP was forcing the writing of a pid file, it
7045 was always written to the default place.
7047 3. If the message "no IP address found for host xxxx" is generated during
7048 incoming verification, it is now followed by identification of the incoming
7049 connection (so you can more easily find what provoked it).
7051 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7053 5. Added some features to "harden" Exim a bit more against certain attacks:
7055 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7056 be put in Local/Makefile. This is like the never_users runtime option,
7057 but it cannot be overridden. The default setting is "root".
7059 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7060 prefix string with which any file named in a -C command line option
7063 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7064 is retained for -C and -D only if the caller of Exim is root. Without
7065 it, the exim user may also use -C and -D and retain privilege.
7067 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7068 command line option is disabled.
7070 6. Macro names set by the -D option must start with an upper case letter, just
7071 like macro names defined in the configuration file.
7073 7. Added "dereference=" facility to LDAP.
7075 8. Two instances of the typo "uknown" in the source files are fixed.
7077 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7078 the Configure-Makefile script screwed up while processing it.
7080 10. Incorporated PCRE 4.4.
7082 11. The SMTP synchronization check was not operating right at the start of an
7083 SMTP session. For example, it could not catch a HELO sent before the client
7084 waited for the greeting. There is now a check for outstanding input at the
7085 point when the greeting is written. Because of the duplex, asynchronous
7086 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7087 way, but not yet received, when the check is performed.
7089 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7090 on TCP/IP sockets, because this apparently causes some broken clients to
7093 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7094 unchanged) from the Cygwin maintainer.
7096 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7097 was supported instead of testing for mbx. Effectively a typo.
7099 15. The spa authenticator server code was not checking that the input it
7100 received was valid base64.
7102 16. The debug output line for the "set" modifier in ACLs was not showing the
7103 name of the variable that was being set.
7105 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7107 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7108 lookup on its own. Something else was needed to trigger the lookup. For
7109 example, a match in host_lookup or the need for a host name in a host list.
7110 Now, if $sender_host_name is referenced and the host name has not yet been
7111 looked up, a lookup is performed. If the lookup fails, the variable remains
7112 empty, and $host_lookup_failed is set to "1".
7114 19. Added "eqi" as a case-independent comparison operator.
7116 20. The saslauthd authentication condition could segfault if neither service
7117 nor realm was specified.
7119 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7120 error message that was logged was misleading, and incoming SMTP
7121 connections were dropped. The message is now more accurate, and temporary
7122 errors are given to SMTP connections.
7124 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7125 (except RSET) with a 421 error, until QUIT is received. However, it was
7126 failing to send a response to QUIT.
7128 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7129 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7130 ACL is now run after the helo_try_verify_hosts code.
7132 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7133 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7134 case-independent, so other case variants are also recognized). Apparently
7135 some systems use these upper case variants.
7137 25. If more than two messages were waiting for the same host, and a transport
7138 filter was specified for the transport, Exim sent two messages over the
7139 same TCP/IP connection, and then failed with "socket operation on non-
7140 socket" when it tried to send the third.
7142 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7144 27. The extern definition of crypt16() in expand.c was not being excluded when
7145 the OS had its own crypt16() function.
7147 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7148 as a preferred synonym for return_size_limit, both as an option and as an
7151 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7153 30. Changed the default configuration ACL to relax the local part checking rule
7154 for addresses that are not in any local domains. For these addresses,
7155 slashes and pipe symbols are allowed within local parts, but the sequence
7156 /../ is explicitly forbidden.
7158 31. SPA server authentication was not clearing the challenge buffer before
7161 32. log_message in a "warn" ACL statement was writing to the reject log as
7162 well as to the main log, which contradicts the documentation and doesn't
7163 seem right (because no rejection is happening). So I have stopped it.
7165 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7166 However, I am unable to do any testing of this.
7168 34. Fixed an infelicity in the appendfile transport. When checking directories
7169 for a mailbox, to see if any needed to be created, it was accidentally
7170 using path names with one or more superfluous leading slashes; tracing
7171 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7173 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7174 contents are added to the log line that is written for every discarded
7175 recipient. (Previously a log_message setting was ignored.)
7177 36. The ${quote: operator now quotes the string if it is empty.
7179 37. The install script runs exim in order to find its version number. If for
7180 some reason other than non-existence or emptiness, which it checks, it
7181 could not run './exim', it was installing it with an empty version number,
7182 i.e. as "exim-". This error state is now caught, and the installation is
7185 38. An argument was missing from the function that creates an error message
7186 when Exim fails to connect to the socket for saslauthd authentication.
7187 This could cause Exim to crash, or give a corrupted message.
7189 39. Added isip, isip4, and isip6 to ${if conditions.
7191 40. The ACL variables $acl_xx are now saved with the message, and can be
7192 accessed later in routers, transports, and filters.
7194 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7195 strings in the file are not string-expanded.
7197 42. If a MAIL command specified a SIZE value that was too large to fit into an
7198 int variable, the check against message_size_limit failed. Such values are
7199 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7200 day this will have to be increased, but I don't think I want to be around
7201 when emails are that large.
7208 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7209 iconv() is not standard in FreeBSD.
7211 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7212 IPv6 enabled. The observed symptom was a segmentation fault on return from
7213 the function os_common_find_running_interfaces() in src/os.c.
7215 3. In the check_special_case() function in daemon.c I had used "errno" as an
7216 argument name, which causes warnings on some systems. This was basically a
7217 typo, since it was named "eno" in the comments!
7219 4. The code that waits for the clock to tick (at a resolution of some fraction
7220 of a second) so as to ensure message-id uniqueness was always waiting for
7221 at least one whole tick, when it could have waited for less. [This is
7222 almost certainly not relevant at current processor speeds, where it is
7223 unlikely to ever wait at all. But we try to future-proof.]
7225 5. The function that sleeps for a time interval that includes fractions of a
7226 second contained a race. It did not block SIGALRM between setting the
7227 timer, and suspending (a couple of lines later). If the interval was short
7228 and the sigsuspend() was delayed until after it had expired, the suspension
7229 never ended. On busy systems this could lead to processes getting stuck for
7232 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7233 process, before it forks any delivery processes. The open lookup caching
7234 mechanism meant that the open file or database connection was passed into
7235 the delivery process. The problem was that delivery processes always tidy
7236 up cached lookup data. This could cause a problem for the next delivery
7237 process started by the queue runner, because the external queue runner
7238 process does not know about the closure. So the next delivery process
7239 still has data in the lookup cache. In the case of a file lookup, there was
7240 no problem because closing a file descriptor in a subprocess doesn't affect
7241 the parent. However, if the lookup was caching a connection to a database,
7242 the connection was closed, and the second delivery process was likely to
7243 see errors such as "PGSQL: query failed: server closed the connection
7244 unexpectedly". The problem has been fixed by closing all cached lookups
7245 in a queue runner before running a delivery process.
7247 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7248 seem to have the "const" qualifier which it has on other OS. I've
7251 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7252 *of the same type* (client or server) with the same public name that an
7253 error should be diagnosed.
7255 9. When Exim looked up a host name for an IP address, but failed to find the
7256 original IP address when looking up the host name (a safety check), it
7257 output the message "<ip address> does not match any IP for NULL", which was
7258 confusing, to say the least. The bug was that the host name should have
7259 appeared instead of "NULL".
7261 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7262 user that is built into the binary, and the -C or -D options is used, root
7263 privilege is dropped before the configuration file is read. In addition,
7264 logging is switched to stderr instead of the normal log files. If the
7265 configuration then re-defines the Exim user, the unprivileged environment
7266 is probably not what is expected, so Exim logs a panic warning message (but
7269 However, if deliver_drop_privilege is set, the unprivileged state may well
7270 be exactly what is intended, so the warning has been cut out in that case,
7271 and Exim is allowed to try to write to its normal log files.
7277 1. smtp_return_error_details was not giving details for temporary sender
7278 or receiver verification errors.
7280 2. Diagnose a configuration error if two authenticators have the same public
7283 3. Exim used not to create the message log file for a message until the first
7284 delivery attempt. This could be confusing when incoming messages were held
7285 for policy or load reasons. The message log file is now created at the time
7286 the message is received, and an initial "Received" line is written to it.
7288 4. The automatically generated man page for command line options had a minor
7289 bug that caused no ill effects; however, a more serious problem was that
7290 the procedure for building the man page automatically didn't always
7291 operate. Consequently, release 4.20 contains an out-of-date version. This
7292 shouldn't happen again.
7294 5. When building Exim with embedded Perl support, the script that builds the
7295 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7296 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7298 6. The freeze_tell option was not being used for messages that were frozen on
7299 arrival, either by an ACL or by local_scan().
7301 7. Added the smtp_incomplete_transaction log selector.
7303 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7304 was accepting AUTH without a new EHLO.
7306 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7307 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7310 10. Logging of TCP/IP connections (when configured) now happens in the main
7311 daemon process instead of the child process, so that the TCP/IP connection
7312 count is more accurate (but it can never be perfect).
7314 11. The use of "drop" in a nested ACL was not being handled correctly in the
7315 outer ACL. Now, if condition failure induced by the nested "drop" causes
7316 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7317 or "require"), the connection is dropped.
7319 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7320 that yield "discard" can now be used with an "accept" or a "discard" verb,
7321 but an error is generated for any others (because I can't see a useful way
7322 to define what should happen).
7324 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7325 are now processed in the same way as lines in the Exim configuration file.
7326 In particular, continuation lines are supported.
7328 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7330 15. Added -ti meaning -t -i.
7332 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7333 domains, and warn by logging if others are found.
7335 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7336 returned from GIFCONF when Exim is trying to find the list of interfaces on
7337 a host. The code in os.c has been modified to copy each ifreq to an aligned
7338 structure in all cases.
7340 Also, in some cases, the returned ifreq's were being copied to a 'struct
7341 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7342 means the last couple of bytes of an IPv6 address could be chopped if the
7343 ifreq contained only a normal sockaddr (14 bytes storage).
7345 18. Named domain lists were not supported in the hosts_treat_as_local option.
7346 An entry such as +xxxx was not recognized, and was treated as a literal
7349 19. Ensure that header lines added by a DATA ACL are included in the reject log
7350 if the ACL subsequently rejects the message.
7352 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7353 MD5 (which is deprecated).
7355 21. When testing a filter file using -bf, Exim was writing a message when it
7356 took the sender from a "From " line in the message, but it was not doing so
7357 when it took $return_path from a Return-Path: header line. It now does.
7359 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7360 with a valid header line field name (a series of printing characters
7361 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7363 23. Changed "disc" in the source to "disk" to conform to the documentation and
7364 the book and for uniformity.
7366 24. Ignore Sendmail's -Ooption=value command line item.
7368 25. When execve() failed while trying to run a command in a pipe transport,
7369 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7370 could be confused with a return value of 69 from the command itself. This
7371 has been changed to 127, the value the shell returns if it is asked to run
7372 a non-existent command. The wording for the related log line suggests a
7373 non-existent command as the problem.
7375 26. If received_header_text expands to an empty string, do not add a Received:
7376 header line to the message. (Well, it adds a token one on the spool, but
7377 marks it "old" so that it doesn't get used or transmitted.)
7379 27. Installed eximstats 1.28 (addition of -nt option).
7381 28. There was no check for failure on the call to getsockname() in the daemon
7382 code. This can fail if there is a shortage of resources on the system, with
7383 ENOMEM, for example. A temporary error is now given on failure.
7385 29. Contrary to the C standard, it seems that in some environments, the
7386 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7387 program. Exim now does this explicitly; it affects the formatting of
7388 timestamps using strftime().
7390 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7391 complaints. I've now initialized all the variables, to avoid this.
7393 32. Header lines added by a system filter were not being "seen" during
7394 transport-time rewrites.
7396 33. The info_callback() function passed to OpenSSL is set up with type void
7397 (*)(SSL *, int, int), as described somewhere. However, when calling the
7398 function (actually a macro) that sets it up, the type void(*)() is
7399 expected. I've put in a cast to prevent warnings from picky compilers.
7401 34. If a DNS black list lookup found a CNAME record, but there were no A
7402 records associated with the domain it pointed at, Exim crashed.
7404 35. If a DNS black list lookup returned more than one A record, Exim ignored
7405 all but the first. It now scans all returned addresses if a particular IP
7406 value is being sought. In this situation, the contents of the
7407 $dnslist_value variable are a list of all the addresses, separated by a
7410 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7411 to accept a host name and all its aliases if the forward lookup for any of
7412 them yielded the IP address of the incoming connection. Now it accepts only
7413 those names whose forward lookup yields the correct IP address. Any other
7414 names are discarded. This closes a loophole whereby a rogue DNS
7415 administrator could create reverse DNS records to break through a
7416 wildcarded host restriction in an ACL.
7418 37. If a user filter or a system filter that ran in a subprocess used any of
7419 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7420 the wrong values were passed to the pipe command ($thisaddress had the
7421 value of $0, $0 had the value of $1, etc). This bug was introduced by
7422 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7424 38. Improved the line breaking for long SMTP error messages from ACLs.
7425 Previously, if there was no break point between 40 and 75 characters, Exim
7426 left the rest of the message alone. Two changes have been made: (a) I've
7427 reduced the minimum length to 35 characters; (b) if it can't find a break
7428 point between 35 and 75 characters, it looks ahead and uses the first one
7429 that it finds. This may give the occasional overlong line, but at least the
7430 remaining text gets split now.
7432 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7433 file descriptors might be low, and that setting 1000 would always raise it.
7434 It turns out that in some environments, the limit is already over 1000 and
7435 that lowering it causes trouble. So now Exim takes care not to decrease it.
7437 40. When delivering a message, the value of $return_path is set to $sender_
7438 address at the start of routing (routers may change the value). By an
7439 oversight, this default was not being set up when an address was tested by
7440 -bt or -bv, which affected the outcome if any router or filter referred to
7443 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7444 log only when "message" or "log_message" are set. However, if one of the
7445 conditions was an address verification, or a call to a nested ACL, the
7446 messages generated by the underlying test were being passed through. This
7447 no longer happens. The underlying message is available in $acl_verify_
7448 message for both "message" and "log_message" expansions, so it can be
7449 passed through if needed.
7451 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7452 new expansion $bh_ to give the encoded byte string without charset
7453 translation. Translation happens only if iconv() is available; HAVE_ICONV
7454 indicates this at build time. HEADERS_CHARSET gives the charset to
7455 translate to; headers_charset can change it in the configuration, and
7456 "headers charset" can change it in an individual filter file.
7458 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7459 that creates RFC 2047 encoded "words" labels them as that charset instead
7460 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7461 expansion operator; (ii) when Exim creates a From: line for a local
7462 message; (iii) when a header line is rewritten to include a "phrase" part.
7464 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7465 buggy, causing it to skip the first lines of messages whose message ID
7466 ended in 'D'. This would not have bitten before Exim release 4.14, because
7467 message IDs were unlikely to end in 'D' before then. The effect was to have
7468 incorrect size information for certain domains.
7470 45. #include "config.h" was missing at the start of the crypt16.c module. This
7471 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7474 46. If there was a timeout during a "random" callout check, Exim treated it as
7475 a failure of the random address, and carried on sending RSET and the real
7476 address. If the delay was just some slowness somewhere, the response to the
7477 original RCPT would be taken as a response to RSET and so on, causing
7478 mayhem of various kinds.
7480 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7481 when I implemented it. It didn't allow for the fact that some option values
7482 may legitimately be negative (e.g. size_addition), and it didn't even do
7483 the right test for positive values.
7485 48. Domain names in DNS records are case-independent. Exim always looks them up
7486 in lower case. Some resolvers return domain names in exactly the case they
7487 appear in the zone file, that is, they may contain uppercase letters. Not
7488 all resolvers do this - some return always lower case. Exim was treating a
7489 change of case by a resolver as a change of domain, similar to a widening
7490 of a domain abbreviation. This triggered its re-routing code and so it was
7491 trying to route what was effectively the same domain again. This normally
7492 caused routing to fail (because the router wouldn't handle the domain
7493 twice). Now Exim checks for this case specially, and just changes the
7494 casing of the domain that it ultimately uses when it transmits the message
7497 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7500 50. If a filter generated a file delivery with a non-absolute name (possible if
7501 no home directory exists for the router), the forbid_file option was not
7504 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7505 the existing equality matching.
7507 52. Exim was using ints instead of ino_t variables in some places where it was
7508 dealing with inode numbers.
7510 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7511 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7512 called TMPDIR, and if it finds it is different, it changes its value.
7514 54. The smtp_printf() function is now made available to local_scan() so
7515 additional output lines can be written before returning. There is also an
7516 smtp_fflush() function to enable the detection of a dropped connection.
7517 The variables smtp_input and smtp_batched_input are exported to
7520 55. Changed the default runtime configuration: the message "Unknown user"
7521 has been removed from the ACL, and instead placed on the localuser router,
7522 using the cannot_route_message feature. This means that any verification
7523 failures that generate their own messages won't get overridden. Similarly,
7524 the "Unrouteable address" message that was in the ACL for unverifiable
7525 relay addresses has also been removed.
7527 56. Added hosts_avoid_esmtp to the smtp transport.
7529 57. The exicyclog script was not checking for the esoteric option
7530 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7531 will work only if exicyclog is run under the appropriate euid.
7533 58. Following a discussion on the list, the rules by which Exim recognises line
7534 endings on incoming messages have been changed. The -dropcr and drop_cr
7535 options are now no-ops, retained only for backwards compatibility. The
7536 following line terminators are recognized: LF CRLF CR. However, special
7537 processing applies to CR:
7539 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7540 nor a local message in the state where . is a terminator.
7542 (ii) If a bare CR is encountered in a header line, an extra space is added
7543 after the line terminator so as not to end the header. The reasoning
7544 behind this is that bare CRs in header lines are most likely either
7545 to be mistakes, or people trying to play silly games.
7547 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7548 was being incorrectly given as 18 bytes larger than it should have been.
7549 This is a VOB (very old bug).
7551 60. This may never have affected anything current, but just in case it has:
7552 When the local host is found other than at the start of a list of hosts,
7553 the local host, those with the same MX, and any that follow, are discarded.
7554 When the list in question was part of a longer list of hosts, the following
7555 hosts (not currently being processed) were also being discarded. This no
7556 longer happens. I'm not sure if this situation could ever has previously
7559 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7562 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7563 header. This is something that is recommended in a new Internet Draft, and
7564 is something that is documented as being done by Sendmail. There are two
7565 possible values. For messages generated by the autoreply transport, Exim
7568 Auto-Submitted: auto-replied
7570 whereas for all other generated messages (e.g. bounces) it adds
7572 Auto-Submitted: auto-generated
7574 63. The "personal" condition in filters now includes a test for the
7575 Auto-Submitted: header. If it contains the string "auto-" the message it
7576 not considered personal.
7578 64. Added rcpt_include_affixes as a generic transport option.
7580 65. Added queue_only_override (default true).
7582 66. Added the syslog_duplication option.
7584 67. If what should have been the first header line of a message consisted of
7585 a space followed by a colon, Exim was mis-interpreting it as a header line.
7586 It isn't of course - it is syntactically invalid and should therefore be
7587 treated as the start of the message body. The misbehaviour could have
7588 caused a number of strange effects, including loss of data in subsequent
7589 header lines, and spool format errors.
7591 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7592 client host had authenticated. This control can now be exercised by an ACL
7593 for more flexibility.
7595 69. By default, callouts do not happen when testing with -bh. There is now a
7596 variant, -bhc, which does actually run the callout code, including
7597 consulting and updating the callout cache.
7599 70. Added support for saslauthd authentication, courtesy of Alexander
7602 71. If statvfs() failed on the spool or log directories while checking their
7603 size for availability, Exim confusingly gave the error "space shortage".
7604 Furthermore, in debugging mode it crashed with a floating point exception.
7605 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7606 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7607 serious problem, Exim now writes to the main and panic logs when this
7608 happens, with details of the failure. It then refuses to accept the
7609 incoming message, giving the message "spool directory problem" or "log
7610 directory problem" with a 421 code for SMTP messages.
7612 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7613 0, 1, and 2 exist, because some OS complain for execs without them (see
7614 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7615 descriptors. However, the code omitted to check that the open succeeded,
7616 causing mysterious errors if for some reason the permissions on /dev/null
7617 got screwed. Now Exim writes a message to the main and panic logs, and
7618 bombs out if it can't open /dev/null.
7620 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7621 interact so that it is all more flexible. It is supposed to remain
7622 backwards compatible. Also added extra_local_interfaces.
7624 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7625 to bomb out with an assertion failure - to the client this appears as a
7626 connection drop. This problem occurs in the part of the code that was taken
7627 from the Samba project. Fortunately, the assertion is in a very simple
7628 function, so I have fixed this by reproducing the function inline in the
7629 one place where it is called, and arranging for authentication to fail
7630 instead of killing the process with assert().
7632 75. The SPA client code was not working when the server requested OEM rather
7633 than Unicode encoding.
7635 76. Added code to make require_files with a specific uid setting more usable in
7636 the case where statting the file as root fails - usually a non-root-mounted
7637 NFS file system. When this happens and the failure is EACCES, Exim now
7638 forks a subprocess and does the per-uid checking as the relevant uid.
7640 77. Added process_log_path.
7642 78. If log_file_path was not explicitly set, a setting of check_log_space or
7643 check_log_inodes was ignored.
7645 79. If a space check for the spool or log partitions fails, the incident is now
7646 logged. Of course, in the latter case the data may get lost...
7648 80. Added the %p formatting code to string_format() so that it can be used to
7649 print addresses in debug_print(). Adjusted all the address printing in the
7650 debugging in store.c to use %p rather than %d.
7652 81. There was a concern that a line of code in smtp_in.c could overflow a
7653 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7654 initially expressed, the concern was not well-founded, because trailing
7655 spaces are removed early. However, if the trailing spaces were followed by
7656 a NULL, they did not get removed, so the overflow was possible. Two fixes
7659 (a) I re-wrote the offending code in a cleaner fashion.
7660 (b) If an incoming SMTP command contains a NULL character, it is rejected
7663 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7664 runs initgroups(), so that if the Exim user is in any additional groups,
7665 they will be used during message reception.
7671 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob