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, and for the pipe transport command.
92 Previously this was permitted.
98 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
99 side, to decode a TLS 1.3 packet capture.
101 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
102 Previously the default library behaviour applied, sending two, each in
105 JH/03 Debug output for ACL now gives the config file name and line number for
108 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
110 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
112 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
113 buffer overrun for (non-chunking) other transports.
115 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
116 TLS1.3, means that a server rejecting a client certificate is not visible
117 to the client until the first read of encrypted data (typically the
118 response to EHLO). Add detection for that case and treat it as a failed
119 TLS connection attempt, so that the normal retry-in-clear can work (if
120 suitably configured).
122 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
123 and/or domain. Found and fixed by Jason Betts.
125 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
126 configuration). If a CNAME target was not a wellformed name pattern, a
129 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
130 the OS reports them interleaved with other addresses.
132 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
133 used both for input and for a verify callout, both encrypted, SMTP
134 responses being sent by the server could be lost. This resulted in
135 dropped connections and sometimes bounces generated by a peer sending
138 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
139 string. Previously it was possible to cause undefined behaviour in a
140 library routine (usually a crash). Found by "zerons".
142 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
145 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
146 API was removed, so update to use the newer ones.
148 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
149 any timeout set, is taking a long time. Previously we would hang on to a
150 rotated logfile "forever" if the input was arriving with long gaps
151 (a previous attempt to fix addressed lack, for a long time, of initial
154 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
155 shared (NFS) environment. The length of the tempfile name is now
156 4 + 16 ("hdr.$message_exim_id") which might break on file
157 systems which restrict the file name length to lower values.
160 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
161 shared (NFS) environment.
163 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
164 did for all versions <4.90). Notably -M, -m, --invert, -I may be
167 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
168 on some platforms for bit 31.
170 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
171 to changes apparently associated with TLS1.3 handling some of the APIs
172 previously used were either nonfunctional or inappropriate. Strings
173 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
174 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
175 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
176 This affects log line X= elements, the $tls_{in,out}_cipher variables,
177 and the use of specific cipher names in the encrypted= ACL condition.
179 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
181 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
182 verification result was not updated unless hosts_require_ocsp applied.
184 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
185 queue_list_requires_admin set to false, non-admin users were denied the
188 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
189 directory-of-certs mode. Previously they were advertised despite the
192 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
193 A single TCP connection by a client will now hold a TLS connection open
194 for multiple message deliveries, by default. Previoud the default was to
197 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
198 default. If built with the facility, DANE will be used. The facility
199 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
201 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
202 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
203 must be defined and you must still, unless you define DISABLE_TLS, manage
204 the the include-dir and library-file requirements that go with that
205 choice. Non-TLS builds are still supported.
207 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
210 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
211 default. If the platform supports and has the facility enabled, it will
212 be requested on all coneections.
214 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
215 controlled by the build-time option SUPPORT_PIPE_CONNECT.
217 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
219 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
220 success-DSN messages. Previously the From: header was always the default
221 one for these; the option was ignored.
223 JH/28 Fix the timeout on smtp response to apply to the whole response.
224 Previously it was reset for every read, so a teergrubing peer sending
225 single bytes within the time limit could extend the connection for a
226 long time. Credit to Qualsys Security Advisory Team for the discovery.
228 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
229 delivery address, which leaked information of the results of local
230 forwarding. Change to the original envelope recipient address, per
233 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
234 requested. Previously not bounce was generated and a log entry of
235 error ignored was made.
237 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
239 JH/32 Introduce a general tainting mechanism for values read from the input
240 channel, and values derived from them. Refuse to expand any tainted
241 values, to catch one form of exploit.
243 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
244 was unused and the unexpanded text used for the test. Found and
245 fixed by Ruben Jenster.
247 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
248 an attempt to use a TLS library read routine dereffed a nul pointer,
251 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
252 them in our smtp response.
254 JH/36 Have the general router option retry_use_local_part default to true when
255 any of the restrictive preconditions are set (to anything). Previously it
256 was only for check_local user. The change removes one item of manual
257 configuration which is required for proper retries when a remote router
258 handles a subset of addresses for a domain.
260 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
261 link count into consideration.
263 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
264 caused the extension of big_buffer, the following lines were ignored.
266 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
267 accordance with RFC 2308. Previously there was no expiry, so a longlived
268 receive process (eg. due to ACL delays) versus a short SOA value could
271 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
273 JH/39 Promote DMARC support to mainline.
275 JH/40 Bug 2452: Add a References: header to DSNs.
277 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
278 parameters. The relevant library call is documented as "Deprecated: This
279 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
280 3.6.0, DH parameters are negotiated following RFC7919."
282 HS/06 Change the default of dnssec_request_domains to "*"
284 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
285 carried on and emitted a BDAT command, even when PIPELINING was not
288 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
289 buffer was used for the filename, resulting in a trap when tainted
290 arguments (eg. $domain) were used.
292 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
293 recommended to avoid a possible server-load attack. The feature can be
294 re-enabled via the openssl_options main cofiguration option.
296 JH/45 local_scan API: documented the current smtp_printf() call. This changed
297 for version 4.90 - adding a "more data" boolean to the arguments.
298 Bumped the ABI version number also, this having been missed previously;
299 release versions 4.90 to 4.92.3 inclusive were effectively broken in
300 respect of usage of smtp_printf() by either local_scan code or libraries
301 accessed via the ${dlfunc } expansion item. Both will need coding
302 adjustment for any calls to smtp_printf() to match the new function
303 signature; a FALSE value for the new argument is always safe.
305 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
306 the file-offset (which the Linux syscall does, and exim expects); this
307 resulted in an indefinite loop.
309 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
310 to do ARC verification. The Authentication-Results: header line added
311 by the configuration then had no ARC item.
317 JH/01 Remove code calling the customisable local_scan function, unless a new
318 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
320 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
321 non-signal-safe functions being used.
323 JH/03 Bug 2269: When presented with a received message having a stupidly large
324 number of DKIM-Signature headers, disable DKIM verification to avoid
325 a resource-consumption attack. The limit is set at twenty.
327 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
328 report of oldest_pass in ${authres } in consequence, and separate out
329 some descriptions of reasons for verification fail.
331 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
332 files in the spool were present and unlocked. A queue-runner could spot
333 them, resulting in a duplicate delivery. Fix that by doing the unlock
334 after the unlink. Investigation by Tim Stewart. Take the opportunity to
335 add more error-checking on spoolfile handling while that code is being
338 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
339 No known attacks, no CVE, this is defensive hardening.
341 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
342 a queue-runner could start a delivery while other operations were ongoing.
343 Cutthrough delivery was a common victim, resulting in duplicate delivery.
344 Found and investigated by Tim Stewart. Fix by using the open message data
345 file handle rather than opening another, and not locally closing it (which
346 releases a lock) for that case, while creating the temporary .eml format
347 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
349 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
350 $sender_verify_failure/$recipient_verify_failure to "random".
352 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
355 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
356 Previously this would segfault.
358 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
361 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
362 like zero, since the resolver should be doing this for us, But we need one
363 as a CNAME but no MX presence gets the CNAME returned; we need to check
364 that doesn't point to an MX to declare it "no MX returned" rather than
365 "error, loop". A new main option is added so the older capability of
366 following some limited number of chain links is maintained.
368 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
370 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
371 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
372 now-deprecated earlier definitions used only specified the range up to TLS
373 1.2 (in the older-version library docs).
375 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
377 JH/15 Rework TLS client-side context management. Stop using a global, and
378 explicitly pass a context around. This enables future use of TLS for
379 connections to service-daemons (eg. malware scanning) while a client smtp
380 connection is using TLS; with cutthrough connections this is quite likely.
382 JH/16 Fix ARC verification to do AS checks in reverse order.
384 JH/17 Support a "tls" option on the ${readsocket } expansion item.
386 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
387 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
388 Previously the "utf8" would be re-prepended for every additional message.
390 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
391 Previously thery were accepted, resulting in issues when attempting to
392 forward messages to a non-supporting MTA.
394 PP/02 Let -n work with printing macros too, not just options.
396 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
397 one parent address was copied, and bogus data was used at delivery-logging
398 time. Either a crash (after delivery) or bogus log data could result.
399 Discovery and analysis by Tim Stewart.
401 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
402 Previously if the string ended mid-character, we did not insert the
403 promised '?' replacement.
405 PP/04 Documentation: current string operators work on bytes, not codepoints.
407 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
408 should pack well giving a smaller memory footprint so better caching and
409 therefore performance. Group the declarations where this can't be done so
410 that the byte-sized flag variables are not interspersed among pointer
411 variables, giving a better chance of good packing by the compiler.
413 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
414 non-null, to avoid issues with sites running BATV. Previously reports were
415 sent with an empty envelope sender so looked like bounces.
417 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
418 The ignore_error flag wasn't being returned from the filter subprocess so
419 was not set for later routers. Investigation and fix by Matthias Kurz.
421 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
422 and a msg:complete for the whole, when a message is manually removed using
423 -Mrm. Developement by Matthias Kurz, hacked on by JH.
425 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
426 a "Gnu special" function, asprintf() in the DB utility binary builds; I
427 hope that is portable enough.
429 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
430 requiring a known-CA anchor certificate; make it now rely entirely on the
431 TLSA as an anchor. Checking the name on the leaf cert against the name
432 on the A-record for the host is still done for TA (but not for EE mode).
434 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
435 included in delivery lines for non-proxied connections, when compiled with
436 SUPPORT_SOCKS and running with proxy logging enabled.
438 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
439 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
440 move the existing event to fire before the normal logging of message
441 failure so that custom logging is bracketed by normal logging.
443 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
444 msg:fail:internal event. Developement by Matthias Kurz.
446 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
447 far too small for todays use of crypto signatures stored there. Go all
448 the way to the max DNS message size of 64kB, even though this might be
449 overmuch for IOT constrained device use.
451 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
452 copy a string over itself. The library routine is documented as not
453 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
455 JH/32 For main options check_spool_space and check_inode_space, where the
456 platform supports 64b integers, support more than the previous 2^31 kB
457 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
458 the previous G, M, k.
460 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
461 $authenticated_fail_id variable on authentication failure. Previously
464 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
465 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
466 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
467 GNUTLS_SEC_PARAM_MEDIUM.
469 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
470 side. Previously we would continue as if no SNI had been received.
472 JH/36 Harden the handling of string-lists. When a list consisted of a sole
473 "<" character, which should be a list-separator specification, we walked
474 off past the nul-terimation.
476 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
477 causes) even when the retry time is not yet met. Previously they were
478 not, meaning that when (say) an account was over-quota and temp-rejecting,
479 and multiple senders' messages were queued, only one sender would get
480 notified on each configured delay_warning cycle.
482 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
484 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
485 cipher-suites, an error can be left on the stack even for a succeeding
486 accept; this results in impossible error messages when a later operation
489 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
490 return error codes indicating retry. Under TLS1.3 this becomes required.
492 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
493 it only wrote the new authenticators, resulting in a lack of tracking of
494 peer changes of ESMTP extensions until the next cache flush.
496 JH/41 Fix the loop reading a message header line to check for integer overflow,
497 and more-often against header_maxsize. Previously a crafted message could
498 induce a crash of the recive process; now the message is cleanly rejected.
500 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
501 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
507 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
508 When redis_servers is set to a list of > 1 element, and the Redis servers
509 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
510 case of MOVED into a DEFER case instead, thus moving the query onto the
511 next server in the list. For a cluster of N elements, all N servers must
512 be defined in redis_servers.
514 GF/02 Catch and remove uninitialized value warning in exiqsumm
515 Check for existence of @ARGV before looking at $ARGV[0]
517 JH/01 Replace the store_release() internal interface with store_newblock(),
518 which internalises the check required to safely use the old one, plus
519 the allocate and data copy operations duplicated in both (!) of the
520 extant use locations.
522 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
523 modifier. This matches the restriction on the commandline.
525 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
526 Previously only the last row was returned.
528 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
529 we assumed that tags in the header were well-formed, and parsed the
530 element content after inspecting only the first char of the tag.
531 Assumptions at that stage could crash the receive process on malformed
534 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
535 While running the DKIM ACL we operate on the Permanent memory pool so that
536 variables created with "set" persist to the DATA ACL. Also (at any time)
537 DNS lookups that fail create cache records using the Permanent pool. But
538 expansions release any allocations made on the current pool - so a dnsdb
539 lookup expansion done in the DKIM ACL releases the memory used for the
540 DNS negative-cache, and bad things result. Solution is to switch to the
541 Main pool for expansions.
542 While we're in that code, add checks on the DNS cache during store_reset,
543 active in the testsuite.
544 Problem spotted, and debugging aided, by Wolfgang Breyha.
546 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
547 When none of the hosts presented to a transport match an already-open
548 connection, close it and proceed with the list. Previously we would
549 queue the message. Spotted by Lena with Yahoo, probably involving
552 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
553 Previously a spurious "250 OK id=" response was appended to the proper
556 JH/08 The "support for" informational output now, which built with Content
557 Scanning support, has a line for the malware scanner interfaces compiled
558 in. Interface can be individually included or not at build time.
560 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
561 by the template makefile "src/EDITME". The "STREAM" support for an older
562 ClamAV interface method is removed.
564 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
565 rows affected is given instead).
567 JH/11 The runtime Berkeley DB library version is now additionally output by
568 "exim -d -bV". Previously only the compile-time version was shown.
570 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
571 SMTP connection. Previously, when one had more receipients than the
572 first, an abortive onward connection was made. Move to full support for
573 multiple onward connections in sequence, handling cutthrough connection
574 for all multi-message initiating connections.
576 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
577 routers. Previously, a multi-recipient message would fail to match the
578 onward-connection opened for the first recipient, and cause its closure.
580 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
581 a timeout on read on a GnuTLS initiating connection, resulting in the
582 initiating connection being dropped. This mattered most when the callout
583 was marked defer_ok. Fix to keep the two timeout-detection methods
586 JH/15 Relax results from ACL control request to enable cutthrough, in
587 unsupported situations, from error to silently (except under debug)
588 ignoring. This covers use with PRDR, frozen messages, queue-only and
591 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
593 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
594 metadata, resulting in a crash in free().
596 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
597 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
598 Broken also in d185889f4, with init system revamp.
600 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
601 Previously we abruptly closed the connection after reading a malware-
602 found indication; now we go on to read the "scan ok" response line,
605 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
606 ACL. Previously, a crash would result.
608 JH/19 Speed up macro lookups during configuration file read, by skipping non-
609 macro text after a replacement (previously it was only once per line) and
610 by skipping builtin macros when searching for an uppercase lead character.
612 JH/20 DANE support moved from Experimental to mainline. The Makefile control
613 for the build is renamed.
615 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
616 was allocated for every new TLS startup, meaning one per message. Fix
617 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
619 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
620 reported the original. Fix to report (as far as possible) the ACL
621 result replacing the original.
623 JH/23 Fix memory leak during multi-message connections using STARTTLS under
624 OpenSSL. Certificate information is loaded for every new TLS startup,
625 and the resources needed to be freed.
627 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
629 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
632 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
633 DATA response info to the (existing) per-recipient response info for
634 the "C=" log element. It can have useful tracking info from the
635 destination system. Patch from Simon Arlott.
637 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
638 length value. Previously this would segfault.
640 HS/02 Support Avast multiline protoocol, this allows passing flags to
641 newer versions of the scanner.
643 JH/28 Ensure that variables possibly set during message acceptance are marked
644 dead before release of memory in the daemon loop. This stops complaints
645 about them when the debug_store option is enabled. Discovered specifically
646 for sender_rate_period, but applies to a whole set of variables.
647 Do the same for the queue-runner and queue-list loops, for variables set
648 from spool message files. Do the same for the SMTP per-message loop, for
649 certain variables indirectly set in ACL operations.
651 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
652 as a multi-recipient message from a mailinglist manager). The coding had
653 an arbitrary cutoff number of characters while checking for more input;
654 enforced by writing a NUL into the buffer. This corrupted long / fast
655 input. The problem was exposed more widely when more pipelineing of SMTP
656 responses was introduced, and one Exim system was feeding another.
657 The symptom is log complaints of SMTP syntax error (NUL chars) on the
658 receiving system, and refused recipients seen by the sending system
659 (propating to people being dropped from mailing lists).
660 Discovered and pinpointed by David Carter.
662 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
663 replaced by the ${authresults } expansion.
665 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
667 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
668 allows proper process termination in container environments.
670 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
671 Previously the "final dot" had a newline after it; ensure it is CR,LF.
673 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
674 and "err_perm", deprecated since 4.83 when the RFC-defined words
675 "temperror" and "permerror" were introduced.
677 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
678 transport-filters or DKIM-signing. The restriction was lost in the
679 consolidation of verify-callout and delivery SMTP handling.
680 Extend the restriction to also cover ARC-signing.
682 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
683 in defer=pass mode supply a 450 to the initiator. Previously the message
686 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
687 tls_require_ciphers is used as before.
689 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
690 "pass_unscanned". Only tmpfails from the scanner are written to
691 the paniclog, as they may require admin intervention (permission
692 denied, license issues). Other scanner errors (like decompression
693 bombs) do not cause a paniclog entry.
695 JH/36 Fix reinitialisation of DKIM logging variable between messages.
696 Previously it was possible to log spurious information in receive log
699 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
700 triggered odd behaviour from Outlook Express clients.
702 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
705 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
706 since the IETF WG has not yet settled on that versus the original
707 "bare" representation.
709 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
710 Previously the millisecond value corrupted the output.
711 Fix also for syslog_pid=no and log_selector +pid, for which the pid
712 corrupted the output.
718 JH/01 Rework error string handling in TLS interface so that the caller in
719 more cases is responsible for logging. This permits library-sourced
720 string to be attached to addresses during delivery, and collapses
721 pairs of long lines into single ones.
723 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
724 during configuration. Wildcards are allowed and expanded.
726 JH/02 Rework error string handling in DKIM to pass more info back to callers.
727 This permits better logging.
729 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
730 do not close it down and have the child transport start it up again on
731 the passed-on TCP connection. Instead, proxy the child (and any
732 subsequent ones) for TLS via a unix-domain socket channel. Logging is
733 affected: the continued delivery log lines do not have any DNSSEC, TLS
734 Certificate or OCSP information. TLS cipher information is still logged.
736 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
737 identical IP addresses on different listening ports. Will also affect
740 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
741 add noisy ifdef guards to special-case this sillyness.
742 Patch from Bernd Kuhls.
744 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
745 than 255 are no longer allowed.
747 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
748 Disable the session-cache too, which might reduce our load. Since we
749 currrectly use a new context for every connection, both as server and
750 client, there is no benefit for these.
751 GnuTLS appears to not support tickets server-side by default (we don't
752 call gnutls_session_ticket_enable_server()) but client side is enabled
753 by default on recent versions (3.1.3 +) unless the PFS priority string
756 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
757 <https://reproducible-builds.org/specs/source-date-epoch/>.
759 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
760 the check for any unsuccessful recipients did not notice the limit, and
761 erroneously found still-pending ones.
763 JH/08 Pipeline CHUNKING command and data together, on kernels that support
764 MSG_MORE. Only in-clear (not on TLS connections).
766 JH/09 Avoid using a temporary file during transport using dkim. Unless a
767 transport-filter is involved we can buffer the headers in memory for
768 creating the signature, and read the spool data file once for the
769 signature and again for transmission.
771 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
772 4.77 as the kernel support then wasn't solid, having issues in 64bit
773 mode. Now, it's been long enough. Add support for FreeBSD also.
775 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
776 case where the routing stage had gathered several addresses to send to
777 a host before calling the transport for the first, we previously failed
778 to close down TLS in the old transport process before passing the TCP
779 connection to the new process. The new one sent a STARTTLS command
780 which naturally failed, giving a failed delivery and bloating the retry
781 database. Investigation and fix prototype from Wolfgang Breyha.
783 JH/12 Fix check on SMTP command input synchronisation. Previously there were
784 false-negatives in the check that the sender had not preempted a response
785 or prompt from Exim (running as a server), due to that code's lack of
786 awareness of the SMTP input buffering.
788 PP/04 Add commandline_checks_require_admin option.
789 Exim drops privileges sanely, various checks such as -be aren't a
790 security problem, as long as you trust local users with access to their
791 own account. When invoked by services which pass untrusted data to
792 Exim, this might be an issue. Set this option in main configuration
793 AND make fixes to the calling application, such as using `--` to stop
796 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
797 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
798 responses to those, into a single TLS record each way (this usually means
799 a single packet). As a side issue, smtp_enforce_sync now works on TLS
802 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
803 affects you only if you're dancing at the edge of the param size limits.
804 If you are, and this message makes sense to you, then: raise the
805 configured limit or use OpenSSL 1.1. Nothing we can do for older
808 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
809 cmdline element to get the documented default one. Previously it was
812 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
813 are unsuable for non-message-specific reasons - eg. connection timeout,
814 banner-time rejection.
816 JH/16 Fix logging of delivery remote port, when specified by router, under
819 PP/06 Repair manualroute's ability to take options in any order, even if one
820 is the name of a transport.
823 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
825 JH/17 Change the list-building routines interface to use the expanding-string
826 triplet model, for better allocation and copying behaviour.
828 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
829 Previously it was constructed the first time a possibly-matching string
830 was met in the configuration file input during startup; now it is done
833 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
834 compatible one, to avoid the (poorly documented) possibility of a config
835 file in the working directory redirecting the DB files, possibly correpting
836 some existing file. CVE-2017-10140 assigned for BDB.
838 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
839 cache-hot. Previously, although the result was properly cached, the
840 initial verify call returned a defer.
842 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
843 the main verify for receipient in uncached-mode.
845 JH/22 Retire historical build files to an "unsupported" subdir. These are
846 defined as "ones for which we have no current evidence of testing".
848 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
849 if present. Previously it was ignored.
851 JH/24 Start using specified-initialisers in C structure init coding. This is
852 a C99 feature (it's 2017, so now considered safe).
854 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
855 if was a fixed-sized field and bitmask ops via macros; it is now more
858 PP/07 GitHub PR 56: Apply MariaDB build fix.
859 Patch provided by Jaroslav Škarvada.
861 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
862 during Coverity cleanups [4.87 JH/47]
863 Diagnosis and fix provided by Michael Fischer v. Mollard.
865 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
866 the right size to place the terminating semicolon on its own folded
867 line, the header hash was calculated to an incorrect value thanks to
868 the (relaxed) space the fold became.
870 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
871 and confused the parent.
873 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
874 which could crash as a result. This could lead to undeliverable messages.
876 JH/28 Logging: "next input sent too soon" now shows where input was truncated
879 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
880 matters on fast-turnover and PID-randomising systems, which were getting
881 out-of-order delivery.
883 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
884 a possibly-overlapping copy. The symptom was that "Remote host closed
885 connection in response to HELO" was logged instead of the actual 4xx
888 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
889 Previously only that bufferd was discarded, resulting in SYMTP command
892 JH/32 DKIM: when a message has multiple signatures matching an identity given
893 in dkim_verify_signers, run the dkim acl once for each. Previously only
894 one run was done. Bug 2189.
896 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
897 "panic the current process" to "deliberately defer". The panic log is
898 still written with the problem list name; the mail and reject logs now
899 get a temp-reject line for the message that was being handled, saying
900 something like "domains check lookup or other defer". The SMTP 451
901 message is still "Temporary local problem".
903 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
904 A crafted sequence of BDAT commands could result in in-use memory beeing
905 freed. CVE-2017-16943.
907 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
908 from SMTP input. Previously it was always done; now only done for DATA
909 and not BDAT commands. CVE-2017-16944.
911 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
912 to the message (such as an overlong header line). Previously this was
913 not done and we did not exit BDAT mode. Followon from the previous item
914 though a different problem.
920 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
921 than -2003 did; needs libidn2 in addition to libidn.
923 JH/02 The path option on a pipe transport is now expanded before use.
925 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
926 Patch provided by "Björn", documentation fix added too.
928 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
929 missing a wire-to-host endian conversion.
931 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
932 close after a BDAT command line could be taken as a following command,
933 giving a synch failure. Fix by only checking for synch immediately
934 before acknowledging the chunk.
936 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
937 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
938 macro. Patches provided by Josh Soref.
940 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
941 Previously we did not; the RFC seems ambiguous and VRFY is not listed
942 by IANA as a service extension. However, John Klensin suggests that we
945 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
946 the dkim code may be unix-mode line endings rather than smtp wire-format
947 CRLF, so prepend a CR to any bare LF.
949 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
950 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
952 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
953 the first were themselves being wrongly included in the feed into dkim
954 processing; with most chunk sizes in use this resulted in an incorrect
955 body hash calculated value.
957 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
958 DKIM signature block, for verification. Although advised against by
959 standards it is specifically not ruled illegal.
961 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
963 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
964 missing a body hash (the bh= tag).
966 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
967 It seems that HAProxy sends the Proxy Protocol information in clear and
968 only then does a TLS startup, so do the same.
970 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
971 TCP connections (such as for Spamd) unless the daemon successfully set
972 Fast Open mode on its listening sockets. This fixes breakage seen on
973 too-old kernels or those not configured for Fast Open, at the cost of
974 requiring both directions being enabled for TFO, and TFO never being used
975 by non-daemon-related Exim processes.
977 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
978 endings, at least on the first header line. Try to canonify any that get
979 past that check, despite the cost.
981 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
982 now limited to an arbitrary five deep, while parsing addresses with the
983 strip_excess_angle_brackets option enabled.
985 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
986 instead leave the unprompted TLS handshake in socket buffer for the
987 TLS library to consume.
989 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
991 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
993 JH/16 Drop variables when they go out of scope. Memory management drops a whole
994 region in one operation, for speed, and this leaves assigned pointers
995 dangling. Add checks run only under the testsuite which checks all
996 variables at a store-reset and panics on a dangling pointer; add code
997 explicitly nulling out all the variables discovered. Fixes one known
998 bug: a transport crash, where a dangling pointer for $sending_ip_address
999 originally assigned in a verify callout, is re-used.
1001 PP/06 Drop '.' from @INC in various Perl scripts.
1003 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1005 PP/08 Reduce a number of compilation warnings under clang; building with
1006 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1007 should be warning-free.
1009 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1011 HS/01 Fix portability problems introduced by PP/08 for platforms where
1012 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1014 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1015 chunk. This allows us to accept broken chunked messages. We need a more
1016 general solution here.
1018 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1019 already-broken messages in the queue.
1021 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1023 JH/19 Fix reference counting bug in routing-generated-address tracking.
1029 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1030 supports it and a size is available (ie. the sending peer gave us one).
1032 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1033 years of being deprecated). The replacements are the ACLs
1034 acl_smtp_mime and acl_not_smtp_mime.
1036 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1037 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1038 or even an in-clear connection were permitted. Now, if the host lookup
1039 was dnssec and dane was requested then the host is only used if the
1040 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1041 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1042 if one fails this test.
1043 This means that a poorly-configured remote DNS will make it incommunicado;
1044 but it protects against a DNS-interception attack on it.
1046 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1047 non-noisy when a race steals the message being considered.
1049 JH/05 If main configuration option tls_certificate is unset, generate a
1050 self-signed certificate for inbound TLS connections.
1052 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1053 in rewrites and routers.
1055 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1056 and logged a warning sing 4.83; now they are a configuration file error.
1058 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1059 (lacking @domain). Apply the same qualification processing as RCPT.
1061 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1063 JH/10 Support ${sha256:} applied to a string (as well as the previous
1066 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1067 a cutthrough deliver is pending, as we always want to make a connection.
1068 This also avoids re-routing the message when later placing the cutthrough
1069 connection after a verify cache hit.
1070 Do not update it with the verify result either.
1072 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1073 when routing results in more than one destination address.
1075 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1076 signing (which inhibits the cutthrough capability). Previously only
1077 the presence of an option was tested; now an expansion evaluating as
1078 empty is permissible (obviously it should depend only on data available
1079 when the cutthrough connection is made).
1081 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1082 the relevant preceding SMTP command did not note the pipelining mode.
1084 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1085 Previously they were not counted.
1087 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1088 as one having no matching records. Previously we deferred the message
1089 that needed the lookup.
1091 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1092 distinguished as "(=".
1094 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1095 for missing MX records. Previously it only worked for missing A records.
1097 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1099 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1100 after the data-go-ahead and data-ack. Patch from Jason Betts.
1102 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1103 even for a "none" policy. Patch from Tony Meyer.
1105 JH/22 Fix continued use of a connection for further deliveries. If a port was
1106 specified by a router, it must also match for the delivery to be
1109 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1110 When one of the recipients of a message was unsuitable for the connection
1111 (has no matching addresses), we lost track of needing to mark it
1112 deferred. As a result mail would be lost.
1114 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1116 JH/25 Decoding ACL controls is now done using a binary search; the source code
1117 takes up less space and should be simpler to maintain. Merge the ACL
1118 condition decode tables also, with similar effect.
1120 JH/26 Fix problem with one_time used on a redirect router which returned the
1121 parent address unchanged. A retry would see the parent address marked as
1122 delivered, so not attempt the (identical) child. As a result mail would
1125 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1126 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1127 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1130 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1131 Main config options check_{log,spool}_{inodes,space} are now
1132 100 inodes, 10MB unless set otherwise in the configuration.
1134 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1135 Previously it only applied to the main-section connection policy
1138 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1140 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1141 by me. Added RFC7919 DH primes as an alternative.
1143 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1144 are not in the system include path.
1146 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1147 GnuTLS, when a session startup failed (eg because the client disconnected)
1148 Exim did stdio operations after fclose. This was exposed by a recent
1149 change which nulled out the file handle after the fclose.
1151 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1152 signed directly by the cert-signing cert, rather than an intermediate
1153 OCSP-signing cert. This is the model used by LetsEncrypt.
1155 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1157 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1158 an incoming connection.
1160 HS/02 Bug 1802: Do not half-close the connection after sending a request
1163 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1164 fallback to "prime256v1".
1166 JH/34 SECURITY: Use proper copy of DATA command in error message.
1167 Could leak key material. Remotely exploitable. CVE-2016-9963.
1173 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1174 and 3.4.4 - once the server is enabled to respond to an OCSP request
1175 it does even when not requested, resulting in a stapling non-aware
1176 client dropping the TLS connection.
1178 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1179 support variable-length bit vectors. No functional change.
1181 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1182 The I= interface field on outgoing lines is now after the H= remote
1183 host field, same as incoming lines. There is a separate
1184 outgoing_interface log selector which allows you to disable the
1187 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1188 If not running log_selector +smtp_connection the mainlog would be held
1189 open indefinitely after a "too many connections" event, including to a
1190 deleted file after a log rotate. Leave the per net connection logging
1191 leaving it open for efficiency as that will be quickly detected by the
1192 check on the next write.
1194 HS/01 Bug 1671: Fix post transport crash.
1195 Processing the wait-<transport> messages could crash the delivery
1196 process if the message IDs didn't exist for some reason. When
1197 using 'split_spool_directory=yes' the construction of the spool
1198 file name failed already, exposing the same netto behaviour.
1200 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1201 mime_regex ACL conditions.
1203 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1204 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1205 to HELO, local diagnostic string.
1207 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1208 log line to debug. Even when configured with a tls authenticator many
1209 client connections are expected to not authenticate in this way, so
1210 an authenticate fail is not an error.
1212 HS/02 Add the Exim version string to the process info. This way exiwhat
1213 gives some more detail about the running daemon.
1215 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1216 matter for fast-change records such as DNSBLs.
1218 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1219 retry record, even if constant. There may be multiple transports with
1220 different interface settings and the retry behaviour needs to be kept
1223 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1225 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1227 JH/10 Bug 840: fix log_defer_output option of pipe transport
1229 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1230 hosts_randomize. This matters a lot when combined with mua_wrapper.
1232 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1233 ${quote_pgsql:<string>} operator.
1235 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1237 JH/14 Change header file name for freeradius-client. Relevant if compiling
1238 with Radius support; from the Gentoo tree and checked under Fedora.
1240 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1242 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1243 option transport_filter, meaning no filtering.
1245 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1247 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1248 defaults to "*" (all hosts). The variable is now available when not built
1249 with TLS, default unset, mainly to enable keeping the testsuite sane.
1250 If a server certificate is not supplied (via tls_certificate) an error is
1251 logged, and clients will find TLS connections fail on startup. Presumably
1252 they will retry in-clear.
1253 Packagers of Exim are strongly encouraged to create a server certificate
1254 at installation time.
1256 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1257 with the $config_file variable.
1259 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1260 in transport context, after the attempt, and per-recipient. The latter type
1261 is per host attempted. The event data is the error message, and the errno
1262 information encodes the lookup type (A vs. MX) used for the (first) host,
1263 and the trailing two digits of the smtp 4xx response.
1265 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1266 to write to mainlog (or rejectlog, paniclog) in the window between file
1267 creation and permissions/ownership being changed. Particularly affects
1268 installations where exicyclog is run as root, rather than exim user;
1269 result is that the running daemon panics and dies.
1271 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1273 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1274 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1275 "pri" and "weight". Note that the previous implicit priority given by the
1276 list order is no longer honoured.
1278 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1279 for DKIM processing.
1281 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1282 by defining SUPPORT_SOCKS.
1284 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1285 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1286 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1287 variables are renamed to proxy_{local,external}_{address,port}.
1289 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1290 for a build by defining SUPPORT_I18N
1292 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1293 of the query string, and make ${quote_redis:} do that quoting.
1295 JH/29 Move Events support from Experimental to mainline, enabled by default
1296 and removable for a build by defining DISABLE_EVENT.
1298 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1300 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1301 cached by the daemon.
1303 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1304 by defining LOOKUP_REDIS. The libhiredis library is required.
1306 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1307 keys are given for lookup.
1309 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1310 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1311 only supported when built with TLS support. The PolarSSL SHA routines
1312 are still used when the TLS library is too old for convenient support.
1314 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1315 openssl_options), for security. OpenSSL forces this from version 1.1.0
1316 server-side so match that on older versions.
1318 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1319 allocation for $value could be released as the expansion processing
1320 concluded, but leaving the global pointer active for it.
1322 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1323 and to use the domains and local_parts ACL conditions.
1325 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1326 incorrectly not doubled on cutthrough transmission, hence seen as a
1327 body-termination at the receiving system - resulting in truncated mails.
1328 Commonly the sender saw a TCP-level error, and retransmitted the message
1329 via the normal store-and-forward channel. This could result in duplicates
1330 received - but deduplicating mailstores were liable to retain only the
1331 initial truncated version.
1333 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1335 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1337 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1338 we're in there, support oversigning also; bug 1309.
1340 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1342 HS/04 Add support for keep_environment and add_environment options.
1344 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1345 either intentional arithmetic overflow during PRNG, or testing config-
1348 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1349 delivery resulted in actual delivery. Cancel cutthrough before DATA
1352 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1353 rejects a recipient: pass the reject to the originator.
1355 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1356 Many were false-positives and ignorable, but it's worth fixing the
1359 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1360 for the new environment-manipulation done at startup. Move the routines
1361 from being local to tls.c to being global via the os.c file.
1363 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1364 an extract embedded as result-arg for a map, the first arg for extract
1365 is unavailable so we cannot tell if this is a numbered or keyed
1366 extraction. Accept either.
1372 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1375 JH/02 The smtp transport option "multi_domain" is now expanded.
1377 JH/03 The smtp transport now requests PRDR by default, if the server offers
1380 JH/04 Certificate name checking on server certificates, when exim is a client,
1381 is now done by default. The transport option tls_verify_cert_hostnames
1382 can be used to disable this per-host. The build option
1383 EXPERIMENTAL_CERTNAMES is withdrawn.
1385 JH/05 The value of the tls_verify_certificates smtp transport and main options
1386 default to the word "system" to access the system default CA bundle.
1387 For GnuTLS, only version 3.0.20 or later.
1389 JH/06 Verification of the server certificate for a TLS connection is now tried
1390 (but not required) by default. The verification status is now logged by
1391 default, for both outbound TLS and client-certificate supplying inbound
1394 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1397 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1398 Status Notification (bounce) messages are now MIME format per RFC 3464.
1399 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1400 under the control of the dsn_advertise_hosts option, and routers may
1401 have a dsn_lasthop option.
1403 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1404 default, modifiable by a malware= option. The list separator for
1405 the options can now be changed in the usual way. Bug 68.
1407 JH/10 The smtp_receive_timeout main option is now expanded before use.
1409 JH/11 The incoming_interface log option now also enables logging of the
1410 local interface on delivery outgoing connections.
1412 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1413 if the interface and destination host and port all match.
1415 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1418 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1419 Patch from Andrew Lewis.
1421 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1422 now supports optional time-restrictions, weighting, and priority
1423 modifiers per server. Patch originally by <rommer@active.by>.
1425 JH/16 The spamd_address main option now supports a mixed list of local
1426 and remote servers. Remote servers can be IPv6 addresses, and
1427 specify a port-range.
1429 JH/17 Bug 68: The spamd_address main option now supports an optional
1430 timeout value per server.
1432 JH/18 Bug 1581: Router and transport options headers_add/remove can
1433 now have the list separator specified.
1435 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1438 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1441 JH/21 Support for the A6 type of dns record is withdrawn.
1443 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1444 rather than the verbs used.
1446 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1447 from 255 to 1024 chars.
1449 JH/24 Verification callouts now attempt to use TLS by default.
1451 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1452 are generic router options now. The defaults didn't change.
1454 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1455 Original patch from Alexander Shikoff, worked over by JH.
1457 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1458 files if ZCAT_COMMAND is not executable.
1460 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1462 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1464 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1465 Normally benign, it bites when the pair was led to by a CNAME;
1466 modern usage is to not canonicalize the domain to a CNAME target
1467 (and we were inconsistent anyway for A-only vs AAAA+A).
1469 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1471 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1472 when evaluating $sender_host_dnssec.
1474 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1475 $sender_helo_dnssec variable.
1477 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1479 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1481 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1483 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1484 documented as working, but never had. Support all but $spam_report.
1486 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1487 added for tls authenticator.
1489 HS/03 Add perl_taintmode main config option
1495 TL/01 When running the test suite, the README says that variables such as
1496 no_msglog_check are global and can be placed anywhere in a specific
1497 test's script, however it was observed that placement needed to be near
1498 the beginning for it to behave that way. Changed the runtest perl
1499 script to read through the entire script once to detect and set these
1500 variables, reset to the beginning of the script, and then run through
1501 the script parsing/test process like normal.
1503 TL/02 The BSD's have an arc4random API. One of the functions to induce
1504 adding randomness was arc4random_stir(), but it has been removed in
1505 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1506 function when detected.
1508 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1509 cause callback expansion.
1511 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1512 syntax errors in an expansion can be treated as a string instead of
1513 logging or causing an error, due to the internal use of bool_lax
1514 instead of bool when processing it.
1516 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1517 server certificates when making smtp deliveries.
1519 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1521 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1523 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1525 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1526 Merged patch from Sebastian Wiedenroth.
1528 JH/05 Fix results-pipe from transport process. Several recipients, combined
1529 with certificate use, exposed issues where response data items split
1530 over buffer boundaries were not parsed properly. This eventually
1531 resulted in duplicates being sent. This issue only became common enough
1532 to notice due to the introduction of connection certificate information,
1533 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1535 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1536 size buffer was used, resulting in syntax errors when an expansion
1539 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1540 version 3.3.6 or later.
1542 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1543 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1544 both become "event_action", the variables become $event_name, $event_data
1545 and $event_defer_errno. There is a new variable $verify_mode, usable in
1546 routers, transports and related events. The tls:cert event is now also
1547 raised for inbound connections, if the main configuration event_action
1550 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1551 early OCSP support, but no stapling (appears to be less than 1.0.0).
1553 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1554 server certificate names available under the smtp transport option
1555 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1558 JH/10 Time-related extraction expansions from certificates now use the main
1559 option "timezone" setting for output formatting, and are consistent
1560 between OpenSSL and GnuTLS compilations. Bug 1541.
1562 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1563 encoded parameter in the incoming message. Bug 1558.
1565 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1566 include certificate info, eximon was claiming there were spoolfile
1569 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1571 JH/14 Log delivery-related information more consistently, using the sequence
1572 "H=<name> [<ip>]" wherever possible.
1574 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1575 are problematic for Debian distribution, omit them from the release
1578 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1580 JH/16 Fix string representation of time values on 64bit time_t architectures.
1583 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1584 output list separator was used.
1589 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1590 checkers that were complaining about end of non-void function with no
1593 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1594 This was a regression introduced in 4.83 by another bugfix.
1596 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1598 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1599 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1605 TF/01 Correctly close the server side of TLS when forking for delivery.
1607 When a message was received over SMTP with TLS, Exim failed to clear up
1608 the incoming connection properly after forking off the child process to
1609 deliver the message. In some situations the subsequent outgoing
1610 delivery connection happened to have the same fd number as the incoming
1611 connection previously had. Exim would try to use TLS and fail, logging
1612 a "Bad file descriptor" error.
1614 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1615 utilities have not been installed.
1617 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1618 temporary space as the ACL may create new global variables.
1620 TL/01 LDAP support uses per connection or global context settings, depending
1621 upon the detected version of the libraries at build time.
1623 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1624 to extract and use the src ip:port in logging and expansions as if it
1625 were a direct connection from the outside internet. PPv2 support was
1626 updated based on HAProxy spec change in May 2014.
1628 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1630 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1631 Properly escape header and check for NULL return.
1633 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1636 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1638 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1639 characters in header names, implemented as a verify condition.
1640 Contributed by Michael Fischer v. Mollard.
1642 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1643 results permerror and temperror. Previous values are deprecated but
1644 still accepted. In a future release, err_perm and err_temp will be
1645 completely removed, which will be a backward incompatibility if the
1646 ACL tests for either of these two old results. Patch contributed by
1647 user bes-internal on the mailing list.
1649 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1651 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1652 selectors, in both main and reject logs.
1654 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1657 JH/07 Add malware type "sock" for talking to simple daemon.
1659 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1661 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1662 routers/transports under cutthrough routing.
1664 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1665 numbers. Touch up "bool" conditional to keep the same definition.
1667 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1669 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1671 JH/12 Expand items in router/transport headers_add or headers_remove lists
1672 individually rather than the list as a whole. Bug 1452.
1674 Required for reasonable handling of multiple headers_ options when
1675 they may be empty; requires that headers_remove items with embedded
1676 colons must have them doubled (or the list-separator changed).
1678 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1679 view the policy declared in the DMARC record. Currently, $dmarc_status
1680 is a combined value of both the record presence and the result of the
1683 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1685 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1686 dnslookup router and the smtp transport (applying to the forward
1689 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1690 of ldap servers used for a specific lookup. Patch provided by Heiko
1693 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1694 New variable $lookup_dnssec_authenticated for observability.
1696 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1697 Patch submitted by Lars Timman.
1699 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1701 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1702 Requires trusted mode and valid format message id, aborts otherwise.
1703 Patch contributed by Heiko Schlichting.
1705 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1706 certextract with support for various fields. Bug 1358.
1708 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1709 is requested by default, modifiable by smtp transport option
1712 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1713 operate on certificate variables to give certificate fingerprints
1714 Also new ${sha256:cert_variable}.
1716 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1718 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1719 Christian Aistleitner.
1721 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1723 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1724 file. Patch from Wolfgang Breyha.
1726 JH/25 Expand the coverage of the delivery $host and $host_address to
1727 client authenticators run in verify callout. Bug 1476.
1729 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1730 align with daemon_smtp_ports. Bug 72.
1732 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1733 support and error reporting did not work properly.
1735 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1736 and is readable. Patch from Andrew Colin Kissa.
1738 TL/14 Enhance documentation of ${run expansion and how it parses the
1739 commandline after expansion, particularly in the case when an
1740 unquoted variable expansion results in an empty value.
1742 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1744 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1745 by renaming away from it. Addresses GH issue 15, reported by
1748 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1750 TL/15 SECURITY: prevent double expansion in math comparison functions
1751 (can expand unsanitized data). Not remotely exploitable.
1758 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1760 PP/02 Make -n do something, by making it not do something.
1761 When combined with -bP, the name of an option is not output.
1763 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1766 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1767 $sender_host_name and config options to manage this, and basic check
1770 PP/05 DSCP support for outbound connections and control modifier for inbound.
1772 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1773 (Only plugin which currently uses this is kerberos4, which nobody should
1774 be using, but we should make it available and other future plugins might
1775 conceivably use it, even though it would break NAT; stuff *should* be
1776 using channel bindings instead).
1778 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1779 name; added for Sendmail compatibility; requires admin caller.
1780 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1781 just ignore it); requires trusted caller.
1782 Also parse but ignore: -Ac -Am -X<logfile>
1785 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1787 TL/02 Add +smtp_confirmation as a default logging option.
1789 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1790 Patch by Magnus Holmgren from 2007-02-20.
1792 TL/04 Bugzilla 1281 - Spec typo.
1793 Bugzilla 1283 - Spec typo.
1794 Bugzilla 1290 - Spec grammar fixes.
1796 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1798 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1800 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1801 mailing list by by Dmitry Isaikin.
1803 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1805 JH/02 Support "G" suffix to numbers in ${if comparisons.
1807 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1809 NM/01 Bugzilla 1197 - Spec typo
1810 Bugzilla 1196 - Spec examples corrections
1812 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1814 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1815 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1818 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1819 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1821 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1822 "acl {{name}{arg}...}", and optional args on acl condition
1825 JH/05 Permit multiple router/transport headers_add/remove lines.
1827 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1829 JH/07 Avoid using a waiting database for a single-message-only transport.
1830 Performance patch from Paul Fisher. Bugzilla 1262.
1832 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1835 JH/09 Add $headers_added variable, with content from use of ACL modifier
1836 add_header (but not yet added to the message). Bugzilla 199.
1838 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1839 Pulled from Bugzilla 817 by Wolfgang Breyha.
1841 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1843 (nb: this is the same fix as in Exim 4.80.1)
1845 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1848 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1851 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1853 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1854 advertise SMTP AUTH mechanism to us, instead of a generic
1855 protocol violation error. Also, make Exim more robust to bad
1856 data from the Dovecot auth socket.
1858 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1860 When a queue runner is handling a message, Exim first routes the
1861 recipient addresses, during which it prunes them based on the retry
1862 hints database. After that it attempts to deliver the message to
1863 any remaining recipients. It then updates the hints database using
1866 So if a recipient address works intermittently, it can get repeatedly
1867 deferred at routing time. The retry hints record remains fresh so the
1868 address never reaches the final cutoff time.
1870 This is a fairly common occurrence when a user is bumping up against
1871 their storage quota. Exim had some logic in its local delivery code
1872 to deal with this. However it did not apply to per-recipient defers
1873 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1875 This change adds a proper retry rule check during routing so that the
1876 final cutoff time is checked against the message's age. We only do
1877 this check if there is an address retry record and there is not a
1878 domain retry record; this implies that previous attempts to handle
1879 the address had the retry_use_local_parts option turned on. We use
1880 this as an approximation for the destination being like a local
1881 delivery, as in LMTP.
1883 I suspect this new check makes the old local delivery cutoff check
1884 redundant, but I have not verified this so I left the code in place.
1886 TF/02 Correct gecos expansion when From: is a prefix of the username.
1888 Test 0254 submits a message to Exim with the header
1892 When I ran the test suite under the user fanf2, Exim expanded
1893 the header to contain my full name, whereas it should have added
1894 a Resent-Sender: header. It erroneously treats any prefix of the
1895 username as equal to the username.
1897 This change corrects that bug.
1899 GF/01 DCC debug and logging tidyup
1900 Error conditions log to paniclog rather than rejectlog.
1901 Debug lines prefixed by "DCC: " to remove any ambiguity.
1903 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1905 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1906 Bug spotted by Jeremy Harris; was flawed since initial commit.
1907 Would have resulted in OCSP responses post-SNI triggering an Exim
1908 NULL dereference and crash.
1910 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1912 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1913 Bug detection, analysis and fix by Samuel Thibault.
1914 Bugzilla 1331, Debian bug #698092.
1916 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1918 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1919 Server implementation by Todd Lyons, client by JH.
1920 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1921 config variable "prdr_enable" controls whether the server
1922 advertises the facility. If the client requests PRDR a new
1923 acl_data_smtp_prdr ACL is called once for each recipient, after
1924 the body content is received and before the acl_smtp_data ACL.
1925 The client is controlled by both of: a hosts_try_prdr option
1926 on the smtp transport, and the server advertisement.
1927 Default client logging of deliveries and rejections involving
1928 PRDR are flagged with the string "PRDR".
1930 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1931 fclose(). Diagnosis by Todd Lyons.
1933 PP/17 Update configure.default to handle IPv6 localhost better.
1934 Patch by Alain Williams (plus minor tweaks).
1937 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1938 This is now consistent with GnuTLS, and is now documented: the
1939 previous undocumented portable approach to treating the option as
1940 unset was to force an expansion failure. That still works, and
1941 an empty string is now equivalent.
1943 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1944 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1945 not performing validation itself.
1947 PP/20 Added force_command boolean option to pipe transport.
1948 Patch from Nick Koston, of cPanel Inc.
1950 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1953 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1955 PP/21 Fix eximon continuous updating with timestamped log-files.
1956 Broken in a format-string cleanup in 4.80, missed when I repaired the
1957 other false fix of the same issue.
1958 Report and fix from Heiko Schlichting.
1961 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1962 Report from Prashanth Katuri.
1964 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1965 It's SecureTransport, so affects any MacOS clients which use the
1966 system-integrated TLS libraries, including email clients.
1968 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1969 using a MIME ACL for non-SMTP local injection.
1970 Report and assistance in diagnosis by Warren Baker.
1972 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1974 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1976 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1977 last id that failed so it may be referenced in subsequent ACL's.
1979 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1982 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1983 ldap library initialization, allowing self-signed CA's to be
1984 used. Also properly sets require_cert option later in code by
1985 using NULL (global ldap config) instead of ldap handle (per
1986 session). Bug diagnosis and testing by alxgomz.
1988 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1989 the src/util/ subdirectory.
1991 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1992 renamed to Transport Post Delivery Action by Jeremy Harris, as
1995 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1996 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1997 redis_servers = needs to be configured which will be used by the redis
1998 lookup. Patch from Warren Baker, of The Packet Hub.
2000 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2002 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2003 hostname or reverse DNS when processing a host list. Used suggestions
2004 from multiple comments on this bug.
2006 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2008 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2009 Missed a few lines, added it to make the runtest require no keyboard
2012 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2013 contains upper case chars. Make router use caseful_local_part.
2015 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2016 support when GnuTLS has been built with p11-kit.
2022 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2024 This, or similar/improved, will also be change PP/11 of 4.82.
2030 PP/01 Handle short writes when writing local log-files.
2031 In practice, only affects FreeBSD (8 onwards).
2032 Bugzilla 1053, with thanks to Dmitry Isaikin.
2034 NM/01 Bugzilla 949 - Documentation tweak
2036 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2039 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2041 PP/02 Implemented gsasl authenticator.
2043 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2045 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2046 `pkg-config foo` for cflags/libs.
2048 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2049 with rest of GSASL and with heimdal_gssapi.
2051 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2052 `pkg-config foo` for cflags/libs for the TLS implementation.
2054 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2055 properties get this fed in as external SSF. A number of robustness
2056 and debugging improvements to the cyrus_sasl authenticator.
2058 PP/08 cyrus_sasl server now expands the server_realm option.
2060 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2061 Patch by Jeremy Harris.
2063 PP/10 Added dbmjz lookup type.
2065 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2067 PP/12 MAIL args handles TAB as well as SP, for better interop with
2068 non-compliant senders.
2069 Analysis and variant patch by Todd Lyons.
2071 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2072 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2073 Patch from Dirk Mueller <dmueller@suse.com>
2075 PP/13 tls_peerdn now print-escaped for spool files.
2076 Observed some $tls_peerdn in wild which contained \n, which resulted
2077 in spool file corruption.
2079 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2080 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2081 or write after TLS renegotiation, which otherwise led to messages
2084 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2085 as a tracking header (ie: a signed header comes before the signature).
2086 Patch from Wolfgang Breyha.
2088 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2089 comma-sep list; embedded commas doubled.
2091 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2093 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2095 Report and patch from Dmitry Banschikov.
2097 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2098 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2099 failures. We appear to now support TLS1.1+ with Exim.
2101 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2102 lets Exim select keys and certificates based upon TLS SNI from client.
2103 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2104 before an outbound SMTP session. New log_selector, +tls_sni.
2106 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2107 NULL dereference. Report and patch from Alun Jones.
2109 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2110 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2111 Not seeing resolver debug output on NetBSD, but suspect this is a
2112 resolver implementation change.
2114 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2115 Left warnings. Added "eximon gdb" invocation mode.
2117 PP/21 Defaulting "accept_8bitmime" to true, not false.
2119 PP/22 Added -bw for inetd wait mode support.
2121 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2122 locate the relevant includes and libraries. Made this the default.
2124 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2125 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2127 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2128 This may cause build issues on older platforms.
2130 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2131 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2132 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2133 Added SNI support via GnuTLS too.
2134 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2136 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2138 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2139 Applied second patch from Janne, implementing suggestion to default
2140 multiple-strings-in-record handling to match SPF spec.
2142 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2144 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2145 read-only, out of scope).
2146 Patch from Wolfgang Breyha, report from Stuart Northfield.
2148 PP/29 Fix three issues highlighted by clang analyser static analysis.
2149 Only crash-plausible issue would require the Cambridge-specific
2150 iplookup router and a misconfiguration.
2151 Report from Marcin Mirosław.
2153 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2155 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2156 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2157 As part of this, removing so much warning spew let me fix some minor
2158 real issues in debug logging.
2160 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2161 assignment on my part. Fixed.
2163 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2164 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2165 Janne Snabb (who went above and beyond: thank you).
2167 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2168 string otherwise requires a connection and a bunch more work and it's
2169 relatively easy to get wrong. Should also expose TLS library linkage
2172 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2173 64-bit ${eval} (JH/03).
2175 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2176 GNU libc to support some of the 64-bit stuff, should not lead to
2177 conflicts. Defined before os.h is pulled in, so if a given platform
2178 needs to override this, it can.
2180 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2181 protection layer was required, which is not implemented.
2182 Bugzilla 1254, patch from Wolfgang Breyha.
2184 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2185 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2186 tls_dhparam take prime identifiers. Also unbreak combination of
2187 OpenSSL+DH_params+TLSSNI.
2189 PP/39 Disable SSLv2 by default in OpenSSL support.
2195 PP/01 Solaris build fix for Oracle's LDAP libraries.
2196 Bugzilla 1109, patch from Stephen Usher.
2198 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2200 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2203 TF/02 Fix a couple more cases where we did not log the error message
2204 when unlink() failed. See also change 4.74-TF/03.
2206 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2207 lock up or crash if it happened to be inside a call to libc when it
2208 got a SIGUSR1 from exiwhat.
2210 The SIGUSR1 handler appends the current process status to the process
2211 log which is later printed by exiwhat. It used to use the general
2212 purpose logging code to do this, but several functions it calls are
2213 not safe for signals.
2215 The new output code in the SIGUSR1 handler is specific to the process
2216 log, and simple enough that it's easy to inspect for signal safety.
2217 Removing some special cases also simplifies the general logging code.
2218 Removing the spurious timestamps from the process log simplifies
2221 TF/04 Improved ratelimit ACL condition.
2223 The /noupdate option has been deprecated in favour of /readonly which
2224 has clearer semantics. The /leaky, /strict, and /readonly update modes
2225 are mutually exclusive. The update mode is no longer included in the
2226 database key; it just determines when the database is updated. (This
2227 means that when you upgrade Exim will forget old rate measurements.)
2229 Exim now checks that the per_* options are used with an update mode that
2230 makes sense for the current ACL. For example, when Exim is processing a
2231 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2232 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2233 must specify per_mail/readonly. If you omit the update mode it defaults to
2234 /leaky where that makes sense (as before) or /readonly where required.
2236 The /noupdate option is now undocumented but still supported for
2237 backwards compatibility. It is equivalent to /readonly except that in
2238 ACLs where /readonly is required you may specify /leaky/noupdate or
2239 /strict/noupdate which are treated the same as /readonly.
2241 A useful new feature is the /count= option. This is a generalization
2242 of the per_byte option, so that you can measure the throughput of other
2243 aggregate values. For example, the per_byte option is now equivalent
2244 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2246 The per_rcpt option has been generalized using the /count= mechanism
2247 (though it's more complicated than the per_byte equivalence). When it is
2248 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2249 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2250 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2251 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2252 Note that using per_rcpt with a non-readonly update mode in more than
2253 one ACL will cause the recipients to be double-counted. (The per_mail
2254 and per_byte options don't have this problem.)
2256 The handling of very low rates has changed slightly. If the computed rate
2257 is less than the event's count (usually one) then this event is the first
2258 after a long gap. In this case the rate is set to the same as this event's
2259 count, so that the first message of a spam run is counted properly.
2261 The major new feature is a mechanism for counting the rate of unique
2262 events. The new per_addr option counts the number of different
2263 recipients that someone has sent messages to in the last time period. It
2264 behaves like per_rcpt if all the recipient addresses are different, but
2265 duplicate recipient addresses do not increase the measured rate. Like
2266 the /count= option this is a general mechanism, so the per_addr option
2267 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2268 example, measure the rate that a client uses different sender addresses
2269 with the options per_mail/unique=$sender_address. There are further
2270 details in the main documentation.
2272 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2274 TF/06 Removed a few PCRE remnants.
2276 TF/07 Automatically extract Exim's version number from tags in the git
2277 repository when doing development or release builds.
2279 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2280 Bugzilla 879. Patch from Paul Fisher.
2282 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2283 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2286 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2288 PP/05 Variable $av_failed, true if the AV scanner deferred.
2289 Bugzilla 1078. Patch from John Horne.
2291 PP/06 Stop make process more reliably on build failure.
2292 Bugzilla 1087. Patch from Heiko Schlittermann.
2294 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2295 Bugzilla 1089. Patch from Heiko Schlittermann.
2297 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2298 Bugzilla 1131. Patch from Holger Weiß.
2300 PP/09 Handle IPv6 addresses with SPF.
2301 Bugzilla 860. Patch from Wolfgang Breyha.
2303 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2305 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2308 PP/11 match_* no longer expand right-hand-side by default.
2309 New compile-time build option, EXPAND_LISTMATCH_RHS.
2310 New expansion conditions, "inlist", "inlisti".
2312 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2314 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2316 PP/14 fix log_write() format string regression from TF/03.
2317 Bugzilla 1152. Patch from Dmitry Isaikin.
2323 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2325 PP/02 Harmonised TLS library version reporting; only show if debugging.
2326 Layout now matches that introduced for other libraries in 4.74 PP/03.
2328 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2330 PP/04 New "dns_use_edns0" global option.
2332 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2335 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2336 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2338 TK/01 Updated PolarSSL code to 0.14.2.
2339 Bugzilla 1097. Patch from Andreas Metzler.
2341 PP/07 Catch divide-by-zero in ${eval:...}.
2342 Fixes bugzilla 1102.
2344 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2347 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2348 format-string attack -- SECURITY: remote arbitrary code execution.
2350 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2351 time unintentionally subject to list matching rules, letting the header
2352 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2353 arbitrary string expansion). This allowed for information disclosure.
2355 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2356 INT_MIN/-1 -- value coerced to INT_MAX.
2362 NM/01 Workaround for PCRE version dependency in version reporting
2365 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2366 This fixes portability to compilers other than gcc, notably
2367 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2369 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2370 makefiles for portability to HP-UX and POSIX correctness.
2372 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2373 Also via indented variable definition in the Makefile.
2374 (Debugging by Oliver Heesakkers).
2376 PP/02 Restore caching of spamd results with expanded spamd_address.
2377 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2379 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2380 Improves build reliability. Fix from: Frank Elsner
2382 NM/02 Fix wide character breakage in the rfc2047 coding
2383 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2385 NM/03 Allow underscore in dnslist lookups
2386 Fixes bug 1026. Patch from Graeme Fowler
2388 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2389 Code patches from Adam Ciarcinski of NetBSD.
2391 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2394 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2395 is logged, to avoid truncation. Patch from John Horne.
2397 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2398 Patch from Jakob Hirsch.
2400 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2401 SQL string expansion failure details.
2402 Patch from Andrey Oktyabrski.
2404 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2405 Patch from Simon Arlott.
2407 PP/09 New lookups functionality failed to compile on old gcc which rejects
2408 extern declarations in function scope.
2409 Patch from Oliver Fleischmann
2411 PP/10 Use sig_atomic_t for flags set from signal handlers.
2412 Check getgroups() return and improve debugging.
2413 Fixed developed for diagnosis in bug 927 (which turned out to be
2416 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2417 Patch from Mark Zealey.
2419 PP/12 Bugzilla 1056: Improved spamd server selection.
2420 Patch from Mark Zealey.
2422 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2423 Based on patch from Heiko Schlittermann.
2425 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2426 Patch from Uwe Doering, sign-off by Michael Haardt.
2428 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2429 variable declaration deep within a block. Bug and patch from
2432 PP/15 lookups-Makefile IRIX compatibility coercion.
2434 PP/16 Make DISABLE_DKIM build knob functional.
2436 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2437 Patch by Simon Arlott
2439 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2440 variable argument macros. Our copy now differs from upstream.
2446 TF/01 Failure to get a lock on a hints database can have serious
2447 consequences so log it to the panic log.
2449 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2450 controlled using the smtp_confirmation log selector.
2452 TF/03 Include the error message when we fail to unlink a spool file.
2454 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2455 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2456 for maintaining out-of-tree patches for some time.
2458 PP/01 Bugzilla 139: Documentation and portability issues.
2459 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2460 Handle per-OS dynamic-module compilation flags.
2462 PP/02 Let /dev/null have normal permissions.
2463 The 4.73 fixes were a little too stringent and complained about the
2464 permissions on /dev/null. Exempt it from some checks.
2465 Reported by Andreas M. Kirchwitz.
2467 PP/03 Report version information for many libraries, including
2468 Exim version information for dynamically loaded libraries. Created
2469 version.h, now support a version extension string for distributors
2470 who patch heavily. Dynamic module ABI change.
2472 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2473 privilege escalation vulnerability whereby the Exim run-time user
2474 can cause root to append content of the attacker's choosing to
2477 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2480 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2481 If dropping privileges for untrusted macros, we disabled normal logging
2482 on the basis that it would fail; for the Exim run-time user, this is not
2483 the case, and it resulted in successful deliveries going unlogged.
2484 Fixed. Reported by Andreas Metzler.
2490 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2491 only prepend for the Resent-* case. Fixes regression introduced in
2492 Exim 4.70 by NM/22 for Bugzilla 607.
2494 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2495 increasing numbers of administrators be bitten by this.
2497 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2499 PP/03 Bugzilla 994: added openssl_options main configuration option.
2501 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2503 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2505 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2507 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2508 without a peer certificate, leading to a segfault because of an
2509 assumption that peers always have certificates. Be a little more
2510 paranoid. Problem reported by Martin Tscholak.
2512 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2513 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2514 NB: ClamAV planning to remove STREAM in "middle of 2010".
2515 CL also introduces -bmalware, various -d+acl logging additions and
2516 more caution in buffer sizes.
2518 PP/09 Implemented reverse_ip expansion operator.
2520 PP/10 Bugzilla 937: provide a "debug" ACL control.
2522 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2524 PP/12 Bugzilla 973: Implement --version.
2526 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2528 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2530 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2532 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2533 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2534 ignore trailing whitespace.
2536 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2538 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2541 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2542 Notification from Dr Andrew Aitchison.
2544 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2545 ExtendedDetectionInfo response format.
2546 Notification from John Horne.
2548 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2551 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2552 XSL and documented dependency on system catalogs, with examples of how
2555 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2558 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2559 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2560 configuration file which is writeable by the Exim user or group.
2562 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2563 of configuration files to cover files specified with the -C option if
2564 they are going to be used with root privileges, not just the default
2567 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2568 option (effectively making it always true).
2570 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2571 files to be used while preserving root privileges.
2573 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2574 that rogue child processes cannot use them.
2576 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2577 run-time user, instead of root.
2579 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2580 Exim run-time user without dropping privileges.
2582 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2583 result string, instead of calling string_vformat() twice with the same
2586 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2587 for other users. Others should always drop root privileges if they use
2588 -C on the command line, even for a whitelisted configure file.
2590 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2592 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2598 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2599 $data_path, and $header_path variables; fixed documentation bugs and
2602 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2603 exipick to access non-standard spools, including the "frozen" queue
2606 NM/01 Bugzilla 965: Support mysql stored procedures.
2607 Patch from Alain Williams
2609 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2611 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2612 Patch from Andreas Metzler
2614 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2615 Patch from Kirill Miazine
2617 NM/05 Bugzilla 671: Added umask to procmail example.
2619 JJ/03 installed exipick 20100323.0, fixing doc bug
2621 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2622 directory. Notification and patch from Dan Rosenberg.
2624 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2626 TK/02 Improve log output when DKIM signing operation fails.
2628 MH/01 Treat the transport option dkim_domain as a colon separated
2629 list, not as a single string, and sign the message with each element,
2630 omitting multiple occurences of the same signer.
2632 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2633 Bugzilla 985, 986. Patch by Simon Arlott
2635 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2636 Patch by Simon Arlott
2638 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2639 MBX locking. Notification from Dan Rosenberg.
2645 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2647 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2649 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2651 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2653 NM/04 Bugzilla 915: Flag broken perl installation during build.
2659 TK/01 Added patch by Johannes Berg that expands the main option
2660 "spamd_address" if it starts with a dollar sign.
2662 TK/02 Write list of recipients to X-Envelope-Sender header when building
2663 the mbox-format spool file for content scanning (suggested by Jakob
2666 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2667 (http://www.dcc-servers.net/) support via dccifd. Activated by
2668 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2670 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2671 by Mark Daniel Reidel <mr@df.eu>.
2673 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2674 When building exim an external PCRE library is now needed -
2675 PCRE is a system library on the majority of modern systems.
2676 See entry on PCRE_LIBS in EDITME file.
2678 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2679 conversation. Added nologin parameter to request.
2680 Patch contributed by Kirill Miazine.
2682 TF/01 Do not log submission mode rewrites if they do not change the address.
2684 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2686 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2687 log files in place. Contributed by Roberto Lima.
2689 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2691 TF/03 Bugzilla 615: When checking the local_parts router precondition
2692 after a local_part_suffix or local_part_prefix option, Exim now
2693 does not use the address's named list lookup cache, since this
2694 contains cached lookups for the whole local part.
2696 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2697 Robert Millan. Documentation is in experimental-spec.txt.
2699 TF/04 Bugzilla 668: Fix parallel build (make -j).
2701 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2703 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2704 Patch provided by Jan Srzednicki.
2706 TF/05 Leading white space used to be stripped from $spam_report which
2707 wrecked the formatting. Now it is preserved.
2709 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2710 that they are available at delivery time.
2712 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2714 TF/08 TLS error reporting now respects the incoming_interface and
2715 incoming_port log selectors.
2717 TF/09 Produce a more useful error message if an SMTP transport's hosts
2718 setting expands to an empty string.
2720 NM/06 Bugzilla 744: EXPN did not work under TLS.
2721 Patch provided by Phil Pennock.
2723 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2724 Patch provided by Richard Godbee.
2726 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2727 acl_smtp_notquit, added index entry.
2729 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2730 Patch provided by Eugene Bujak.
2732 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2733 accept(). Patch provided by Maxim Dounin.
2735 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2736 Patch provided by Phil Pennock.
2738 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2740 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2741 Patch provided by Brad "anomie" Jorsch.
2743 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2744 Patch provided by Dean Brooks.
2746 TK/05 Add native DKIM support (does not depend on external libraries).
2748 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2749 Patch provided by Graeme Fowler.
2751 NM/16 Bugzilla 851: Documentation example syntax fix.
2753 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2755 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2758 NM/19 Bugzilla 745: TLS version reporting.
2759 Patch provided by Phil Pennock.
2761 NM/20 Bugzilla 167: bool: condition support.
2762 Patch provided by Phil Pennock.
2764 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2765 clients. Patch provided by Phil Pennock.
2767 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2768 Patch provided by Brad "anomie" Jorsch.
2770 NM/23 Bugzilla 687: Fix misparses in eximstats.
2771 Patch provided by Heiko Schlittermann.
2773 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2774 Patch provided by Heiko Schlittermann.
2776 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2777 plus update to original patch.
2779 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2781 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2782 Patch provided by David Brownlee.
2784 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2786 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2788 NM/30 Bugzilla 888: TLS documentation bugfixes.
2790 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2792 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2793 Unlike the original bugzilla I have changed all shell scripts in src tree.
2795 NM/33 Bugzilla 898: Transport filter timeout fix.
2796 Patch by Todd Rinaldo.
2798 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2799 Patch by Serge Demonchaux.
2801 NM/35 Bugzilla 39: Base64 decode bug fixes.
2802 Patch by Jakob Hirsch.
2804 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2806 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2808 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2810 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2816 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2817 ALT-N's libdkim that I have put here:
2818 http://duncanthrax.net/exim-experimental/
2820 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2821 were called 'true' and it seems that C99 defines that as a reserved
2822 keyword to be used with 'bool' variable types. That means you could
2823 not include C99-style headers which use bools without triggering
2824 build errors in sieve.c.
2826 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2827 as mailq or other aliases. Changed the --help handling significantly
2828 to do whats expected. exim_usage() emits usage/help information.
2830 SC/01 Added the -bylocaldomain option to eximstats.
2832 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2834 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2836 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2842 PH/01 Another patch from the Sieve maintainer.
2844 PH/02 When an IPv6 address is converted to a string for single-key lookup
2845 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2846 dots are used instead of colons so that keys in lsearch files need not
2847 contain colons. This was done some time before quoting was made available
2848 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2849 (notated using the quote facility) so as to distinguish them from IPv4
2850 keys. This meant that lookups for IP addresses in host lists did not work
2851 for iplsearch lookups.
2853 This has been fixed by arranging for IPv6 addresses to be expressed with
2854 colons if the lookup type is iplsearch. This is not incompatible, because
2855 previously such lookups could never work.
2857 The situation is now rather anomalous, since one *can* have colons in
2858 ordinary lsearch keys. However, making the change in all cases is
2859 incompatible and would probably break a number of configurations.
2861 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2864 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2865 conversion specification without a maximum field width, thereby enabling
2866 a rogue spamd server to cause a buffer overflow. While nobody in their
2867 right mind would setup Exim to query an untrusted spamd server, an
2868 attacker that gains access to a server running spamd could potentially
2869 exploit this vulnerability to run arbitrary code as the Exim user.
2871 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2872 $primary_hostname instead of what libspf2 thinks the hosts name is.
2874 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2875 a directory entry by the name of the lookup key. Previously, if a
2876 symlink pointed to a non-existing file or a file in a directory that
2877 Exim lacked permissions to read, a lookup for a key matching that
2878 symlink would fail. Now it is enough that a matching directory entry
2879 exists, symlink or not. (Bugzilla 503.)
2881 PH/03 The body_linecount and body_zerocount variables are now exported in the
2884 PH/04 Added the $dnslist_matched variable.
2886 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2887 This means they are set thereafter only if the connection becomes
2890 PH/06 Added the client_condition to authenticators so that some can be skipped
2891 by clients under certain conditions.
2893 PH/07 The error message for a badly-placed control=no_multiline_responses left
2894 "_responses" off the end of the name.
2896 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2898 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2899 (without spaces) instead of just copying the configuration text.
2901 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2903 PH/11 Added $max_received_linelength.
2905 PH/12 Added +ignore_defer and +include_defer to host lists.
2907 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2908 way in which PCRE > 7.0 is built.
2910 PH/14 Implemented queue_only_load_latch.
2912 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2913 MAIL command. The effect was to mangle the value on 64-bit systems.
2915 PH/16 Another patch from the Sieve maintainer.
2917 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2919 PH/18 If a system quota error occurred while trying to create the file for
2920 a maildir delivery, the message "Mailbox is full" was not appended to the
2921 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2922 only to a quota excession during the actual writing of the file.
2924 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2925 characters?) which causes problems in log lines. The DN values are now
2926 passed through string_printing() before being added to log lines.
2928 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2929 and InterBase are left for another time.)
2931 PH/21 Added message_body_newlines option.
2933 PH/22 Guard against possible overflow in moan_check_errorcopy().
2935 PH/23 POSIX allows open() to be a macro; guard against that.
2937 PH/24 If the recipient of an error message contained an @ in the local part
2938 (suitably quoted, of course), incorrect values were put in $domain and
2939 $local_part during the evaluation of errors_copy.
2945 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2946 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2949 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2950 issue a MAIL command.
2952 PH/02 In an ACL statement such as
2954 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2956 if a client was not listed at all, or was listed with a value other than
2957 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2958 the condition was not true (as it should be), so access was not denied.
2959 The bug was that the ! inversion was incorrectly passed on to the second
2960 item. This has been fixed.
2962 PH/03 Added additional dnslists conditions == and =& which are different from
2963 = and & when the dns lookup returns more than one IP address.
2965 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2966 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2968 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2969 FSYNC, which compiles an option called disable_fsync that allows for
2970 bypassing fsync(). The documentation is heavily laced with warnings.
2972 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2974 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2975 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2976 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2977 including adding "make clean"; (3) Added -fPIC when compiling the test
2978 dynamically loaded module, to get rid of a warning.
2980 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2981 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2982 = 0s. The bug is otherwise harmless.
2984 PH/07 There was a bug in the dovecot authenticator such that the value of
2985 $auth1 could be overwritten, and so not correctly preserved, after a
2986 successful authentication. This usually meant that the value preserved by
2987 the server_setid option was incorrect.
2989 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2991 PH/09 Installed PCRE release 7.0.
2993 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2994 run for batched SMTP input. It is now run at the start of every message
2995 in the batch. While fixing this I discovered that the process information
2996 (output by running exiwhat) was not always getting set for -bs and -bS
2997 input. This is fixed, and it now also says "batched" for BSMTP.
2999 PH/11 Added control=no_pipelining.
3001 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3002 patch, slightly modified), and move the expansion of helo_data till after
3003 the connection is made in the smtp transport (so it can use these
3006 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3008 PH/14 Added log_selector = +pid.
3010 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3012 PH/16 Add ${if forany and ${if forall.
3014 PH/17 Added dsn_from option to vary the From: line in DSNs.
3016 PH/18 Flush SMTP output before performing a callout, unless control =
3017 no_callout_flush is set.
3019 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3020 was true (the default) a successful delivery failed to delete the retry
3021 item, thus causing premature timeout of the address. The bug is now
3024 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3026 PH/21 Long custom messages for fakedefer and fakereject are now split up
3027 into multiline responses in the same way that messages for "deny" and
3028 other ACL rejections are.
3030 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3031 with slight modification.
3033 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3034 draft, changing the syntax and factoring some duplicate code".
3036 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3037 for deliveries of the second and subsequent messages over the same SMTP
3040 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3041 ${reduce, with only minor "tidies".
3043 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3045 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3046 expansion side effects.
3048 PH/27 When a message times out after an over-quota error from an Exim-imposed
3049 quota, the bounce message says "mailbox is full". This message was not
3050 being given when it was a system quota that was exceeded. It now should
3053 MH/03 Made $recipients available in local_scan(). local_scan() already has
3054 better access to the recipient list through recipients_list[], but
3055 $recipients can be useful in postmaster-provided expansion strings.
3057 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3058 in the case of a MAIL command with additional options following the
3059 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3060 were accidentally chopped off.
3062 PH/29 SMTP synchronization checks are implemented when a command is read -
3063 there is a check that no more input is waiting when there shouldn't be
3064 any. However, for some commands, a delay in an ACL can mean that it is
3065 some time before the response is written. In this time, more input might
3066 arrive, invalidly. So now there are extra checks after an ACL has run for
3067 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3068 pipelining has not been advertised.
3070 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3072 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3073 returned in the SMTP response when smtp_return_error_details was false.
3074 This has been fixed.
3076 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3077 instead of the C I/O that was originally supplied, because problems were
3078 reported on Solaris.
3080 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3081 Exim which did not show up earlier: it was assuming that a call to
3082 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3083 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3084 was a macro that became an assignment, so it seemed to work. This has
3085 changed to a proper function call with a void return, hence the compile
3086 error. Exim's code has been fixed.
3088 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3091 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3093 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3095 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3096 because it turns out to be too big or there is a timeout) there is no
3097 "Completed" line in the log. When some messages of this type were
3098 selected by exigrep, they were listed as "not completed". Others were
3099 picked up by some special patterns. I have improved the selection
3100 criteria to be more general.
3102 PH/38 The host_find_failed option in the manualroute router can now be set
3103 to "ignore", to completely ignore a host whose IP address cannot be
3104 found. If all hosts are ignored, the behaviour is controlled by the new
3105 host_all_ignored option.
3107 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3108 homing or because of multiple MX records with /mx) generated more than
3109 one IP address, and the following item turned out to be the local host,
3110 all the secondary addresses of the first item were incorrectly removed
3111 from the list, along with the local host and any following hosts (which
3112 is what is supposed to happen).
3114 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3115 whoever called Exim into the -H file. In the case of the daemon it was
3116 behaving confusingly. When first started, it used values for whoever
3117 started the daemon, but after a SIGHUP it used the Exim user (because it
3118 calls itself on a restart). I have changed the code so that it now always
3121 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3122 message are rejected with the same error (e.g. no authentication or bad
3123 sender address), and a DATA command is nevertheless sent (as can happen
3124 with PIPELINING or a stupid MUA), the error message that was given to the
3125 RCPT commands is included in the rejection of the DATA command. This is
3126 intended to be helpful for MUAs that show only the final error to their
3129 PH/42 Another patch from the Sieve maintainer.
3131 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3132 Eximstats - Fixed some broken HTML links and added missing column headers
3134 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3135 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3137 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3139 PH/43 Yet another patch from the Sieve maintainer.
3141 PH/44 I found a way to check for a TCP/IP connection going away before sending
3142 the response to the final '.' that terminates a message, but only in the
3143 case where the client has not sent further data following the '.'
3144 (unfortunately, this is allowed). However, in many cases there won't be
3145 any further data because there won't be any more messages to send. A call
3146 to select() can be used: if it shows that the input is "ready", there is
3147 either input waiting, or the socket has been closed. An attempt to read
3148 the next input character can distinguish the two cases. Previously, Exim
3149 would have sent an OK response which the client would never have see.
3150 This could lead to message repetition. This fix should cure that, at
3151 least in a lot of common cases.
3153 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3154 advertised in response to EHLO.
3160 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3161 fixed by 4.65/MH/01 (is this a record?) are fixed:
3163 (i) An empty string was always treated as zero by the numeric comparison
3164 operators. This behaviour has been restored.
3166 (ii) It is documented that the numeric comparison operators always treat
3167 their arguments as decimal numbers. This was broken in that numbers
3168 starting with 0 were being interpreted as octal.
3170 While fixing these problems I realized that there was another issue that
3171 hadn't been noticed. Values of message_size_limit (both the global option
3172 and the transport option) were treated as octal if they started with 0.
3173 The documentation was vague. These values are now always treated as
3174 decimal, and I will make that clear in the documentation.
3180 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3181 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3184 MH/01 Don't check that the operands of numeric comparison operators are
3185 integers when their expansion is in "skipping" mode (fixes bug
3186 introduced by 4.64-PH/07).
3188 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3189 child addresses, Exim now panics and dies. Previously, because the count
3190 is held in a short int, deliveries were likely to be lost. As such a
3191 large number of recipients for a single message is ridiculous
3192 (performance will be very, very poor), I have chosen to impose a limit
3193 rather than extend the field.
3199 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3200 leftover -K file (the existence of which was triggered by #402).
3201 While we were at it, introduced process PID as part of the -K
3202 filename. This should rule out race conditions when creating
3205 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3206 processing considerably. Previous code took too long for large mails,
3207 triggering a timeout which in turn triggers #401.
3209 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3210 in the DK code in transports.c. sendfile() is not really portable,
3211 hence the _LINUX specificness.
3213 TF/01 In the add_headers option to the mail command in an Exim filter,
3214 there was a bug that Exim would claim a syntax error in any
3215 header after the first one which had an odd number of characters
3218 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3219 callout verification, Exim cached a "reject" for the entire domain. This
3220 is correct for most verifications, but it is not correct for a recipient
3221 verification with use_sender or use_postmaster set, because in that case
3222 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3223 case of MAIL FROM:<> rejection from other early rejections (e.g.
3224 rejection of HELO). When verifying a recipient using a non-null MAIL
3225 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3226 Whatever the result of the callout, the value of the domain cache is
3227 left unchanged (for any other kind of callout, getting as far as trying
3228 RCPT means that the domain itself is ok).
3230 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3233 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3234 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3235 session, the daemon ignores ECONNECT errors and logs others; it now
3236 ignores EPIPE as well.
3238 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3239 (quoted-printable decoding).
3241 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3242 later the small subsequent patch to fix an introduced bug.
3244 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3246 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3248 PH/08 An error is now given if message_size_limit is specified negative.
3250 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3251 to be given (somewhat) arbitrary names.
3253 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3256 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3257 miscellaneous code fixes
3259 PH/10 Added the log_reject_target ACL modifier to specify where to log
3262 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3263 hostname. This is wrong, because it relates to the incoming message (and
3264 probably the interface on which it is arriving) and not to the outgoing
3265 callout (which could be using a different interface). This has been
3266 changed to use the value of the helo_data option from the smtp transport
3267 instead - this is what is used when a message is actually being sent. If
3268 there is no remote transport (possible with a router that sets up host
3269 addresses), $smtp_active_hostname is used.
3271 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3272 tweaks were necessary in order to get it to work (see also 21 below):
3273 (a) The code assumed that strncpy() returns a negative number on buffer
3274 overflow, which isn't the case. Replaced with Exim's string_format()
3276 (b) There were several signed/unsigned issues. I just did the minimum
3277 hacking in of casts. There is scope for a larger refactoring.
3278 (c) The code used strcasecmp() which is not a standard C function.
3279 Replaced with Exim's strcmpic() function.
3280 (d) The code set only $1; it now sets $auth1 as well.
3281 (e) A simple test gave the error "authentication client didn't specify
3282 service in request". It would seem that Dovecot has changed its
3283 interface. Fortunately there's a specification; I followed it and
3284 changed what the client sends and it appears to be working now.
3286 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3289 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3290 address A is aliased to B and C, where B exists and C does not. Without
3291 -v the output is "A verified" because verification stops after a
3292 successful redirection if more than one address is generated. However,
3293 with -v the child addresses are also verified. Exim was outputting "A
3294 failed to verify" and then showing the successful verification for C,
3295 with its parentage. It now outputs "B failed to verify", showing B's
3296 parentage before showing the successful verification of C.
3298 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3299 look up a TXT record in a specific list after matching in a combined
3302 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3303 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3304 they consult the DNS. I had assumed they would set it the way they
3305 wanted; and indeed my experiments on Linux seem to show that in some
3306 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3307 To be on the safe side, however, I have now made the interface to
3308 host_find_byname() similar to host_find_bydns(), with an argument
3309 containing the DNS resolver options. The host_find_byname() function now
3310 sets these options at its start, just as host_find_bydns() does. The smtp
3311 transport options dns_qualify_single and dns_search_parents are passed to
3312 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3313 of host_find_byname() use the default settings of RES_DEFNAMES
3314 (qualify_single) but not RES_DNSRCH (search_parents).
3316 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3317 spool_read_header() do less string testing, by means of a preliminary
3318 switch on the second character of optional "-foo" lines. (This is
3319 overdue, caused by the large number of possibilities that now exist.
3320 Originally there were few.) While I was there, I also converted the
3321 str(n)cmp tests so they don't re-test the leading "-" and the first
3322 character, in the hope this might squeeze out yet more improvement.
3324 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3325 flag allowing group syntax was set by the header_syntax check but not
3326 turned off, possible causing trouble later; (2) The flag was not being
3327 set at all for the header_verify test, causing "group"-style headers to
3328 be rejected. I have now set it in this case, and also caused header_
3329 verify to ignore an empty address taken from a group. While doing this, I
3330 came across some other cases where the code for allowing group syntax
3331 while scanning a header line wasn't quite right (mostly, not resetting
3332 the flag correctly in the right place). These bugs could have caused
3333 trouble for malformed header lines. I hope it is now all correct.
3335 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3336 with the "reply" argument non-NULL. The code, however (which originally
3337 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3338 but it didn't always do it. This confused somebody who was copying the
3339 code for some other use. I have removed all the tests.
3341 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3342 feature that was used to support insecure browsers during the U.S. crypto
3343 embargo. It requires special client support, and Exim is probably the
3344 only MTA that supported it -- and would never use it because real RSA is
3345 always available. This code has been removed, because it had the bad
3346 effect of slowing Exim down by computing (never used) parameters for the
3347 RSA_EXPORT functionality.
3349 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3350 authenticator to fail if there's a tab character in the incoming data
3351 (there should never be unless someone is messing about, as it's supposed
3352 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3353 if the connection is using TLS or if the remote IP is the same as the
3354 local IP, and the "valid-client-cert option" if a client certificate has
3357 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3358 authenticators. This can be used for authorization after authentication
3359 succeeds. (In the case of plaintext, it servers for both authentication
3362 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3363 if any retry times were supplied.
3365 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3366 connection, where there is no client IP address to check. In this
3367 situation, the verify now always succeeds.
3369 PH/25 Applied John Jetmore's -Mset patch.
3371 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3373 PH/27 In a string expansion for a processed (not raw) header when multiple
3374 headers of the same name were present, leading whitespace was being
3375 removed from all of them, but trailing whitespace was being removed only
3376 from the last one. Now trailing whitespace is removed from each header
3377 before concatenation. Completely empty headers in a concatenation (as
3378 before) are ignored.
3380 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3381 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3383 PH/29 [Removed. This was a change that I later backed out, and forgot to
3384 correct the ChangeLog entry (that I had efficiently created) before
3385 committing the later change.]
3387 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3388 address errors (4xx response to RCPT) over the same connection as other
3389 messages routed to the same hosts. Such deliveries are always "forced",
3390 so retry times are not inspected. This resulted in far too many retries
3391 for the affected addresses. The effect occurred only when there were more
3392 hosts than the hosts_max_try setting in the smtp transport when it had
3393 the 4xx errors. Those hosts that it had tried were not added to the list
3394 of hosts for which the message was waiting, so if all were tried, there
3395 was no problem. Two fixes have been applied:
3397 (i) If there are any address or message errors in an SMTP delivery, none
3398 of the hosts (tried or untried) are now added to the list of hosts
3399 for which the message is waiting, so the message should not be a
3400 candidate for sending over the same connection that was used for a
3401 successful delivery of some other message. This seems entirely
3402 reasonable: after all the message is NOT "waiting for some host".
3403 This is so "obvious" that I'm not sure why it wasn't done
3404 previously. Hope I haven't missed anything, but it can't do any
3405 harm, as the worst effect is to miss an optimization.
3407 (ii) If, despite (i), such a delivery is accidentally attempted, the
3408 routing retry time is respected, so at least it doesn't keep
3409 hammering the server.
3411 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3412 in ${readsocket because some servers need this prod.
3414 PH/32 Added some extra debug output when updating a wait-xxx database.
3416 PH/33 The hint "could be header name not terminated by colon", which has been
3417 given for certain expansion errors for a long time, was not being given
3418 for the ${if def:h_colon_omitted{... case.
3420 PH/34 The spec says: "With one important exception, whenever a domain list is
3421 being scanned, $domain contains the subject domain." There was at least
3422 one case where this was not true.
3424 PH/35 The error "getsockname() failed: connection reset by peer" was being
3425 written to the panic log as well as the main log, but it isn't really
3426 panic-worthy as it just means the connection died rather early on. I have
3427 removed the panic log writing for the ECONNRESET error when getsockname()
3430 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3431 runs only) independently of the message's sender address. This meant
3432 that, if the 4xx error was in fact related to the sender, a different
3433 message to the same recipient with a different sender could confuse
3434 things. In particular, this can happen when sending to a greylisting
3435 server, but other circumstances could also provoke similar problems.
3436 I have changed the default so that the retry time for these errors is now
3437 based a combination of the sender and recipient addresses. This change
3438 can be overridden by setting address_retry_include_sender=false in the
3441 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3442 remote server are returned as part of bounce messages. This was not
3443 happening for LMTP over a pipe (the lmtp transport), but now it is the
3444 same for both kinds of LMTP.
3446 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3447 in header lines that were in fact CNAMEs. This is no longer the case.
3449 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3450 and queue runs started by the daemon processed all messages. This has
3451 been fixed so that -R and -S can now usefully be given with -q<time>.
3453 PH/40 Import PCRE release 6.7 (fixes some bugs).
3455 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3457 PH/42 Give an error if -q is specified more than once.
3459 PH/43 Renamed the variables $interface_address and $interface_port as
3460 $received_ip_address and $received_port, to make it clear that these
3461 values apply to message reception, and not to the outgoing interface when
3462 a message is delivered. (The old names remain recognized, of course.)
3464 PH/44 There was no timeout on the connect() call when using a Unix domain
3465 socket in the ${readsocket expansion. There now is.
3467 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3468 be meaningful with "accept".
3470 SC/01 Eximstats V1.43
3471 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3473 SC/02 Eximstats V1.44
3474 Use a glob alias rather than an array ref in the generated
3475 parser. This improves both readability and performance.
3477 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3478 Collect SpamAssassin and rejection statistics.
3479 Don't display local sender or destination tables unless
3480 there is data to show.
3481 Added average volumes into the top table text output.
3483 SC/04 Eximstats V1.46
3484 Collect data on the number of addresses (recipients)
3485 as well as the number of messages.
3487 SC/05 Eximstats V1.47
3488 Added 'Message too big' to the list of mail rejection
3489 reasons (thanks to Marco Gaiarin).
3491 SC/06 Eximstats V1.48
3492 Mainlog lines which have GMT offsets and are too short to
3493 have a flag are now skipped.
3495 SC/07 Eximstats V1.49 (Alain Williams)
3496 Added the -emptyok flag.
3498 SC/08 Eximstats V1.50
3499 Fixes for obtaining the IP address from reject messages.
3501 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3502 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3503 whitespace changes from 4.64-PH/27
3505 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3508 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3509 are found, allow negative numbers in numeric criteria)
3511 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3513 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3514 to match changes made in 4.64-PH/43
3516 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3518 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3519 "domain" is actually an IP address, and force a failure. This locks out
3520 those revolvers/nameservers that support "A-for-A" lookups, in
3521 contravention of the specifications.
3523 PH/48 When a host name was looked up from an IP address, and the subsequent
3524 forward lookup of the name timed out, the host name was left in
3525 $sender_host_name, contrary to the specification.
3527 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3528 restricted to single-key lookups, Exim was not diagnosing an error if
3529 * or *@ was used with a query-style lookup.
3531 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3533 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3534 long ago, but noone interested enough thought of it. Let's just say that
3535 the "1.1" means that there are some new functions that weren't there at
3536 some point in the past.
3538 PH/51 Error processing for expansion failure of helo_data from an smtp
3539 transport during callout processing was broken.
3541 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3542 tested/used via the -bh/-bhc/-bs options.
3544 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3545 bug, fixed in subsequent PCRE releases).
3547 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3548 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3550 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3556 SC/01 Use a glob alias rather than an array ref in eximstats generated
3557 parser. This improves both readability and performance.
3559 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3560 Don't display local sender or destination tables in eximstats unless
3561 there is data to show.
3562 Added average volumes into the eximstats top table text output.
3564 SC/03 Collect data on the number of addresses (recipients) as well
3565 as the number of messages in eximstats.
3567 TF/01 Correct an error in the documentation for the redirect router. Exim
3568 does (usually) call initgroups() when daemonizing.
3570 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3571 with consistent privilege compared to when running as a daemon.
3573 TF/03 Note in the spec that $authenticated_id is not set for local
3574 submissions from trusted users.
3576 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3577 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3579 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3580 by adding some example configuration directives to the default
3581 configuration file. A little bit of work is required to uncomment the
3582 directives and define how usernames and passwords are checked, but
3583 there is now a framework to start from.
3585 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3586 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3587 without this. I don't know how relevant this is to other LDAP libraries.
3589 PH/02 Add the verb name to the "unknown ACL verb" error.
3591 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3593 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3595 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3596 directory not expanded when it should be if an expanded home directory
3597 was set for the address (which is overridden by the transport).
3599 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3602 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3603 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3604 because it is too late at that time, and has no effect.
3606 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3607 security issue with \' (bugzilla #107). I could not use the
3608 PQescapeStringConn() function, because it needs a PGconn value as one of
3611 PH/08 When testing addresses using -bt, indicate those final addresses that
3612 are duplicates that would not cause an additional delivery. At least one
3613 person was confused, thinking that -bt output corresponded to deliveries.
3614 (Suppressing duplicates isn't a good idea as you lose the information
3615 about possibly different redirections that led to the duplicates.)
3617 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3618 systems where poll() doesn't work, in particular OS X.
3620 PH/10 Added more information to debugging output for retry time not reached.
3622 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3623 operations in malware.c.
3625 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3628 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3629 syslog_duplication set false, log lines that would normally be written
3630 both the the main log and to the reject log were not written to syslog at
3633 PH/14 In the default configuration, change the use of "message" in ACL warn
3634 statements to "add_header".
3636 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3637 not followed by a command (e.g. "seen endif").
3639 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3640 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3643 PH/17 Added extra conditions to the default value of delay_warning_condition
3647 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3648 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3649 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3652 The Auto-Submitted: and various List- headers are standardised, whereas I
3653 don't think Precedence: ever was.
3655 PH/18 Refactored debugging code in route_finduser() to show more information,
3656 in particular, the error code if getpwnam() issues one.
3658 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3659 This is apparently needed in addition to the PH/07 change above to avoid
3660 any possible encoding problems.
3662 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3663 but not after initializing Perl.
3665 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3666 output them only if debugging. By default they are written stderr,
3667 apparently, which is not desirable.
3669 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3672 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3675 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3677 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3678 authenticated or an ident call has been made. Suppress the default
3679 values for $authenticated_id and $authenticated_sender (but permit -oMai
3680 and -oMas) when testing with -bh.
3682 PH/24 Re-jigged the order of the tests in the default configuration so that the
3683 tests for valid domains and recipients precede the DNS black list and CSA
3684 tests, on the grounds that those ones are more expensive.
3686 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3687 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3688 This bug exists in every version of Exim that I still have, right back to
3691 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3692 However, an attempt to turn on case-sensitivity in a regex key by
3693 including (?-i) didn't work because the subject string was already
3694 lowercased, and the effects were non-intuitive. It turns out that a
3695 one-line patch can be used to allow (?-i) to work as expected.
3701 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3702 other effects) broke the use of negated acl sub-conditions.
3704 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3707 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3708 "Deny" causes Exim to reject the incoming connection with a 554 error.
3709 Unfortunately, if there is a major crisis, such as a disk failure,
3710 tcp-wrappers gives "deny", whereas what one would like would be some
3711 kind of temporary error. A kludge has been added to help with this.
3712 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3713 554 error is used if errno is still zero or contains ENOENT (which occurs
3714 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3717 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3719 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3720 errors. Otherwise a message that provokes a temporary error (when other
3721 messages do not) can cause a whole host to time out.
3723 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3724 addresses were routed directly to files or pipes from a redirect router.
3725 File deliveries just didn't batch; pipe deliveries might have suffered
3728 PH/06 A failure to get a lock for a hints database would erroneously always say
3729 "Failed to get write lock", even when it was really a read lock.
3731 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3732 of 0600. This has been changed to use the value of the lockfile_mode
3733 option (which defaults to 0600).
3735 PH/08 Applied small patch from the Sieve maintainer.
3737 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3738 folder from quota calculations, a direct delivery into this folder messed
3739 up the contents of the maildirsize file. This was because the regex was
3740 used only to exclude .Trash (or whatever) when the size of the mailbox
3741 was calculated. There was no check that a delivery was happening into an
3742 excluded directory. This bug has been fixed by ignoring all quota
3743 processing for deliveries into excluded directories.
3745 PH/10 Added the maildirfolder_create_regex option to appendfile.
3751 PH/01 The code for finding all the local interface addresses on a FreeBSD
3752 system running IPv6 was broken. This may well have applied to all BSD
3753 systems, as well as to others that have similar system calls. The broken
3754 code found IPv4 interfaces correctly, but gave incorrect values for the
3755 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3756 that it would not match correctly against @[] and not recognize the IPv6
3759 PH/02 The ipliteral router was not recognizing addresses of the form user@
3760 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3762 PH/03 Added disable_ipv6.
3764 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3765 decoded form, because it is most often used to construct To: headers
3766 lines in autoreplies, and the decoded form may well be syntactically
3767 invalid. However, $reply_address has leading white space removed, and all
3768 newlines turned into spaces so that the autoreply transport does not
3771 PH/05 If group was specified without a user on a router, and no group or user
3772 was specified on a transport, the group from the router was ignored.
3774 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3775 for visible compile-time settings that can be used to change these
3776 numbers, for those that want even more. Backwards compatibility with old
3777 spool files has been maintained. However, going back to a previous Exim
3778 release will lost any variables that are in spool files.
3780 PH/07 Two small changes when running in the test harness: increase delay when
3781 passing a TCP/IP connection to a new process, in case the original
3782 process has to generate a bounce, and remove special handling of
3783 127.0.0.2 (sic), which is no longer necessary.
3785 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3786 be the same on different OS.
3788 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3791 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3792 whether --show-vars was specified or not
3794 JJ/02 exipick: Added support for new ACL variable spool format introduced
3797 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3798 syntactically invalid From: or Reply-to: line, and a filter used this to
3799 generate an autoreply, and therefore failed to obtain an address for the
3800 autoreply, Exim could try to deliver to a non-existent relative file
3801 name, causing unrelated and misleading errors. What now happens is that
3802 it logs this as a hard delivery error, but does not attempt to create a
3805 PH/11 The exinext utility has a -C option for testing purposes, but although
3806 the given file was scanned by exinext itself; it wasn't being passed on
3807 when Exim was called.
3809 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3810 an end-of-file indication when reading a command response.
3812 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3813 compiled. In many other places in Exim, IPv6 addresses are always
3814 recognized, so I have changed this. It also means that IPv4 domain
3815 literals of the form [IPV4:n.n.n.n] are now always recognized.
3817 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3818 used if the router is not running as root, for example, when verifying at
3819 ACL time, or when using -bh. The debugging output from this situation was
3820 non-existent - all you got was a failure to exec. I have made two
3823 (a) Failures to set uid/gid, the current directory, or a process leader
3824 in a subprocess such as that created by queryprogram now generate
3825 suitable debugging output when -d is set.
3827 (b) The queryprogram router detects when it is not running as root,
3828 outputs suitable debugging information if -d is set, and then runs
3829 the subprocess without attempting to change uid/gid.
3831 PH/15 Minor change to Makefile for building test_host (undocumented testing
3834 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3835 additional section of a DNS packet that returns MX or SRV records.
3836 Instead, it always explicitly searches for A/AAAA records. This avoids
3837 major problems that occur when a DNS server includes only records of one
3838 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3839 fixed another bug: if SRV records were looked up and the corresponding
3840 address records were *not* found in the additional section, the port
3841 values from the SRV records were lost.
3843 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3844 using the correct key (the original address) when searching the retry
3845 rules in order to find which one to use for generating the retry hint.
3847 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3848 adding the default one. Similarly, if it contains a Reply-To: header, the
3849 errors_reply_to option, if set, is not used.
3851 PH/19 When calculating a retry time, Exim used to measure the "time since
3852 failure" by looking at the "first failed" field in the retry record. Now
3853 it does not use this if it is later than than the arrival time of the
3854 message. Instead it uses the arrival time. This makes for better
3855 behaviour in cases where some deliveries succeed, thus re-setting the
3856 "first failed" field. An example is a quota failure for a huge message
3857 when small messages continue to be delivered. Without this change, the
3858 "time since failure" will always be short, possible causing more frequent
3859 delivery attempts for the huge message than are intended.
3860 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3862 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3863 $1, $2, $3) because the numerical variables can be reset during some
3864 expansion items (e.g. "match"), thereby losing the authentication data.
3866 PH/21 Make -bV show the size of off_t variables so that the test suite can
3867 decide whether to run tests for quotas > 2G.
3869 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3870 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3871 filecount value is greater than 2G or if a quota value is greater than 2G
3872 on a system where the size of off_t is not greater than 4, a panic error
3875 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3876 never match. The debug and -bh output now contains an explicit error
3877 message indicating a malformed IPv4 address or mask.
3879 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3880 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3881 PH/23 above applies.
3883 PH/25 Do not write to syslog when running in the test harness. The only
3884 occasion when this arises is a failure to open the main or panic logs
3885 (for which there is an explicit test).
3887 PH/26 Added the /no_tell option to "control=freeze".
3889 PH/27 If a host name lookup failed very early in a connection, for example, if
3890 the IP address matched host_lookup and the reverse lookup yielded a name
3891 that did not have a forward lookup, an error message of the form "no IP
3892 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3893 could be logged. Now it outputs the IP address instead of "NULL".
3895 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3896 allows the sender and the authenticated sender to be set when
3897 submitting a message from within Exim. Since child_open_exim() is
3898 documented for local_scan(), the new function should be too.
3900 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3901 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3902 results in an empty string is now treated as unset.
3904 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3906 PH/31 Added sender_verify_fail logging option.
3908 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3909 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3910 tidied the source and removed it altogether.
3912 PH/33 When a queue run was abandoned because the load average was too high, a
3913 log line was always written; now it is written only if the queue_run log
3914 selector is set. In addition, the log line for abandonment now contains
3915 information about the queue run such as the pid. This is always present
3916 in "start" and "stop" lines but was omitted from the "abandon" line.
3918 PH/34 Omit spaces between a header name and the colon in the error message that
3919 is given when verify = headers_syntax fails (if there are lots of them,
3920 the message gets confusing).
3922 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3923 names, as there are now some PTR records that contain slashes. This check
3924 is only to protect against broken name servers that fall over on strange
3925 characters, so the fact that it applies to all lookups doesn't matter.
3927 PH/36 Now that the new test suite is complete, we can remove some of the
3928 special code in Exim that was needed for the old test suite. For example,
3929 sorting DNS records because real resolvers return them in an arbitrary
3930 order. The new test suite's fake resolver always returns records in the
3933 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3934 bounces) except when queue_only is set, to avoid logging races between
3935 the different processes.
3937 PH/38 Panic-die if .include specifies a non-absolute path.
3939 PH/39 A tweak to the "H" retry rule from its user.
3941 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3942 a label. They prevented compilation on older perls.
3944 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3945 a warning to be raised on newish perls.
3947 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3948 on queue. Changes to match documented behaviour of showing count of
3949 messages matching specified criteria.
3951 PH/40 Changed the default ident timeout from 30s to 5s.
3953 PH/41 Added support for the use of login_cap features, on those BSD systems
3954 that have them, for controlling the resources used by pipe deliveries.
3956 PH/42 The content-scanning code uses fopen() to create files in which to put
3957 message data. Previously it was not paying any attention to the mode of
3958 the files. Exim runs with umask(0) because the rest of the code creates
3959 files with open(), and sets the required mode explicitly. Thus, these
3960 files were ending up world-writeable. This was not a big issue, because,
3961 being within the spool directory, they were not world-accessible. I have
3962 created a function called modefopen, which takes an additional mode
3963 argument. It sets umask(777), creates the file, chmods it to the required
3964 mode, then resets the umask. All the relevant calls to fopen() in the
3965 content scanning code have been changed to use this function.
3967 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3968 to 24 hours. This avoids potential overflow problems when processing G
3969 and H retry rules. I suspect nobody ever tinkers with this value.
3971 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3973 PH/45 When the plaintext authenticator is running as a client, the server's
3974 challenges are checked to ensure they are valid base64 strings. By
3975 default, the authentication attempt is cancelled if an invalid string is
3976 received. Setting client_ignore_invalid_base64 true ignores these errors.
3977 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3978 they are received. Thus, the responses can be made to depend on the
3979 challenges. If an invalid string is ignored, an empty string is placed in
3982 PH/46 Messages that are created by the autoreply transport now contains a
3983 References: header, in accordance with RFCs 2822 and 3834.
3985 PH/47 Added authenticated_sender_force to the smtp transport.
3987 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3989 PH/49 Installed latest patch from the Sieve maintainer.
3991 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3992 was also set, the appendfile transport was unnecessarily scanning a
3993 directory of message files (e.g. for maildir delivery) to find the count
3994 of files (along with the size), even though it did not need this
3995 information. It now does the scan only if it needs to find either the
3996 size of the count of files.
3998 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4000 PH/52 Two bugs concerned with error handling when the smtp transport is
4003 (i) Exim was not creating retry information for temporary errors given
4004 for individual recipients after the DATA command when the smtp transport
4005 was used in LMTP mode. This meant that they could be retried too
4006 frequently, and not timed out correctly.
4008 (ii) Exim was setting the flag that allows error details to be returned
4009 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4010 recipients that were returned after the DATA command.
4012 PH/53 This is related to PH/52, but is more general: for any failing address,
4013 when detailed error information was permitted to be returned to the
4014 sender, but the error was temporary, then after the final timeout, only
4015 "retry timeout exceeded" was returned. Now it returns the full error as
4016 well as "retry timeout exceeded".
4018 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4019 do this, and (what is worse) MTAs that accept it.
4021 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4022 will now be deprecated.
4024 PH/56 New os.c-cygwin from the Cygwin maintainer.
4026 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4027 formats (previously only available in exim formats via -bpr, -bpru,
4028 and -bpra. Now also available in native and exiqgrep formats)
4030 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4031 with very large, slow to parse queues
4033 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4035 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4037 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4038 responses to authentication challenges, though it was showing the
4039 challenges; (ii) I've removed the CR characters from the debug output for
4042 PH/58 Allow for the insertion of a newline as well as a space when a string
4043 is turned into more than one encoded-word during RFC 2047 encoding. The
4044 Sieve code now uses this.
4046 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4047 data_4xx, lost_connection, tls_required.
4049 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4050 message was being sent as an SMTP response.
4052 PH/61 Add -l and -k options to exicyclog.
4054 PH/62 When verifying, if an address was redirected to one new address, so that
4055 verification continued, and the new address failed or deferred after
4056 having set something in $address_data, the value of $address_data was not
4057 passed back to the ACL. This was different to the case when no
4058 redirection occurred. The value is now passed back in both cases.
4060 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4061 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4062 use login_cap.h, so on its own it isn't the distinguishing feature. The
4063 new name refers directly to the setclassresources() function.
4065 PH/65 Added configuration files for NetBSD3.
4067 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4069 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4070 is preferred over IPv4.
4072 PH/68 The bounce_return_message and bounce_return_body options were not being
4073 honoured for bounces generated during the reception of non-SMTP messages.
4074 In particular, this applied to messages rejected by the ACL. This bug has
4075 been fixed. However, if bounce_return_message is true and bounce_return_
4076 body is false, the headers that are returned for a non-SMTP message
4077 include only those that have been read before the error was detected.
4078 (In the case of an ACL rejection, they have all been read.)
4080 PH/69 The HTML version of the specification is now built in a directory called
4081 spec_html instead of spec.html, because the latter looks like a path with
4082 a MIME-type, and this confuses some software.
4084 PH/70 Catch two compiler warnings in sieve.c.
4086 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4087 function verify_get_ident() calls ip_connect() to connect a socket, but
4088 if the "connect()" function timed out, ip_connect() used to close the
4089 socket. However, verify_get_ident() also closes the socket later, and in
4090 between Exim writes to the log, which may get opened at this point. When
4091 the socket was closed in ip_connect(), the log could get the same file
4092 descriptor number as the socket. This naturally causes chaos. The fix is
4093 not to close the socket in ip_connect(); the socket should be closed by
4094 the function that creates it. There was only one place in the code where
4095 this was missing, in the iplookup router, which I don't think anybody now
4096 uses, but I've fixed it anyway.
4098 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4099 well as to direct DNS lookups. Otherwise the handling of names in host
4100 lists is inconsistent and therefore confusing.
4106 PH/01 Two changes to the default runtime configuration:
4108 (1) Move the checks for relay_from_hosts and authenticated clients from
4109 after to before the (commented out) DNS black list checks.
4111 (2) Add control=submission to the relay_from_hosts and authenticated
4112 clients checks, on the grounds that messages accepted by these
4113 statements are most likely to be submissions.
4115 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4117 (1) Generate an error if the third argument for the ${prvs expansion is
4120 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4123 (3) Reset the variables that are obtained from the first argument of
4124 ${prvscheck and used in the second argument before leaving the code,
4125 because their memory is reclaimed, so using them afterwards may do
4128 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4129 one (it's much easier than Tom thought :-).
4131 (5) Because of (4), we can now allow for the use of $prvscheck_result
4132 inside the third argument.
4134 PH/03 For some reason, the default setting of PATH when running a command from
4135 a pipe transport was just "/usr/bin". I have changed it to
4138 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4139 anything to be listed in the output from -bV.
4141 PH/05 When a filter generated an autoreply, the entire To: header line was
4142 quoted in the delivery log line, like this:
4144 => >A.N.Other <ano@some.domain> <original@ddress> ...
4146 This has been changed so that it extracts the operative address. There
4147 may be more than one such address. If so, they are comma-separated, like
4150 => >ano@some.domain,ona@other.domain <original@ddress> ...
4152 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4153 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4154 not being looked up in the rDNS to get a host name, Exim was showing the
4155 IP address twice in Received: lines, even though the IP addresses were
4156 identical. For example:
4158 Received: from [1.2.3.4] (helo=[1.2.3.4])
4160 However, if the real host name was known, it was omitting the HELO data
4161 if it matched the actual IP address. This has been tidied up so that it
4162 doesn't show the same IP address twice.
4164 PH/07 When both +timestamp and +memory debugging was on, the value given by
4165 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4166 called by the debug printing, thereby overwriting the timestamp buffer.
4167 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4169 PH/08 When the original message was included in an autoreply transport, it
4170 always said "this is a copy of the message, including all the headers",
4171 even if body_only or headers_only was set. It now gives an appropriate
4174 PH/09 Applied a patch from the Sieve maintainer which:
4176 o fixes some comments
4177 o adds the (disabled) notify extension core
4178 o adds some debug output for the result of if/elsif tests
4179 o points to the current vacation draft in the documentation
4180 and documents the missing references header update
4184 o fixes a bug in processing the envelope test (when testing
4185 multiple envelope elements, the last element determined the
4188 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4189 Electronic Mail") by including:
4191 Auto-submitted: auto-generated
4193 in the messages that it generates (bounce messages and others, such as
4194 warnings). In the case of bounce messages for non-SMTP messages, there was
4195 also a typo: it was using "Auto_submitted" (underscore instead of
4196 hyphen). Since every message generated by Exim is necessarily in response
4197 to another message, thes have all been changed to:
4199 Auto-Submitted: auto-replied
4201 in accordance with these statements in the RFC:
4203 The auto-replied keyword:
4205 - SHOULD be used on messages sent in direct response to another
4206 message by an automatic process,
4208 - MUST NOT be used on manually-generated messages,
4210 - MAY be used on Delivery Status Notifications (DSNs) and Message
4211 Disposition Notifications (MDNs),
4213 - MUST NOT be used on messages generated by automatic or periodic
4214 processes, except for messages which are automatic responses to
4217 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4218 to the default Received: header definition.
4220 PH/12 Added log selector acl_warn_skipped (default on).
4222 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4223 variables because (a) they are in the wrong storage pool and (b) even if
4224 they were copied, it wouldn't work properly because of the caching.
4226 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4227 checking when decoding. Apparently there are clients that generate
4228 overlong encoded strings. Why am I not surprised?
4230 PH/15 If the first argument of "${if match_address" was not empty, but did not
4231 contain an "@" character, Exim crashed. Now it writes a panic log message
4232 and treats the condition as false.
4234 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4236 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4237 extension "envelope-auth". The code is finished and in agreement with
4238 other implementations, but there is no documentation so far and in fact,
4239 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4240 not changing the active code.
4242 Print executed "if" and "elsif" statements when debugging is used. This
4243 helps a great deal to understand what a filter does.
4245 Document more things not specified clearly in RFC3028. I had all this
4246 sorted out, when out of a sudden new issues came to my mind. Oops."
4248 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4251 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4252 canonical form (as documented). However, after a host name lookup from
4253 the IP address, check_host() was doing a simple string comparison with
4254 addresses acquired from the DNS when checking that the found name did
4255 have the original IP as one of its addresses. Since any found IPv6
4256 addresses are likely to be in abbreviated form, the comparison could
4257 fail. Luckily, there already exists a function for doing the comparison
4258 by converting both addresses to binary, so now that is used instead of
4259 the text comparison.
4261 PH/20 There was another similar case to PH/19, when a complete host name was
4262 given in a host list; looking up its IP address could give an abbreviated
4263 form, whereas the current host's name might or might not be abbreviated.
4264 The same fix has been applied.
4270 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4271 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4274 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4275 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4277 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4279 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4280 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4281 Also, for "Auto-Submitted", treat anything other than "no" as
4282 non-personal, in accordance with RFC 3834. (Previously it treated
4283 anything starting "auto-" as non-personal.)
4285 TF/01 The control=submission/name=... option had a problem with syntax
4286 errors if the name included a slash character. The /name= option
4287 now slurps the rest of the string, so it can include any characters
4288 but it must come last in the list of options (after /sender_retain
4291 PH/05 Some modifications to the interface to the fake nameserver for the new
4299 TK/01 Added the "success_on_redirect" address verification option. See
4300 NewStuff for rationale and an example.
4302 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4304 PH/02 Patch to exigrep to allow it to work on syslog lines.
4306 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4307 fread() to skip over the body file's header line, because in Cygwin the
4308 header line is locked and is inaccessible.
4310 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4311 co-exist for some time) to make it clear that it is the Exim ID that is
4312 referenced, not the Message-ID: header line.
4314 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4315 string_format() function, because snprintf() does not exist on all
4318 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4319 ${stat: expansion item.
4321 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4322 protocol synchronization error", to keep the pedants happy.
4324 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4325 well as for IRIX systems, when gcc is being used. See the host.c source
4328 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4330 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4333 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4334 transport and to the smtp transport in LMTP mode.
4336 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4338 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4339 run a filter in a subprocess. This could lead to confusion in subsequent
4340 lookups in the parent process. There should also be a search_tidyup() at
4341 the end of the subprocess.
4343 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4344 only if the host matched helo_try_verify_hosts, which caused the
4345 verification to occur when the EHLO/HELO command was issued. The ACL just
4346 tested the remembered result. Now, if a previous verification attempt has
4347 not happened, "verify = helo" does it there and then.
4349 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4351 TK/03 Fix log output including CR from clamd.
4353 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4354 exist provoked a memory error which could cause a segfault.
4356 PH/15 Installed PCRE 6.2
4358 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4360 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4361 of the problem. Specifically, suggested +O2 rather than +O1 for the
4364 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4366 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4367 record, the port was not correctly logged when the outgoing_port log
4368 selector was set (it logged the transort's default port).
4370 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4371 fallback_hosts, and "hosts" in the smtp transport.
4373 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4374 host errors such as "Connection refused".
4376 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4377 authentication with radiusclient 0.4.9:
4379 - Error returned from rc_read_config was caught wrongly
4380 - Username/password not passed on to radius server due to wrong length.
4382 The presumption is that some radiusclient API changes for 4.51/PH/17
4383 were not taken care of correctly. The code is still untested by me (my
4384 Linux distribution still has 0.3.2 of radiusclient), but it was
4385 contributed by a Radius user.
4387 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4388 expanding the "port" option of the smtp transport.
4390 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4391 while reading a MIME header. Thanks to Tom Hughes for a patch.
4393 PH/24 Include config.h inside local_scan.h so that configuration settings are
4396 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4397 that in an ACL for RCPT (for example), you can examine exactly what was
4400 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4401 commands, but it was not correctly comparing the address with the actual
4402 client host address. Thus, it would show the EHLO address in Received:
4403 header lines when this was not necessary.
4405 PH/27 Added the % operator to ${eval:}.
4407 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4408 it should be ignoring failures (because with -C, for example, it has lost
4409 privilege). It wasn't ignoring creation failures other than "already
4412 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4415 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4416 because an input line was too long, either on its own, or by virtue of
4417 too many continuations, the temporary file was not being removed, and the
4418 return code was incorrect.
4420 PH/31 Missing "BOOL" in function definition in filtertest.c.
4422 PH/32 Applied Sieve patches from the maintainer.
4424 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4426 PH/33 Added "verify = not_blind".
4428 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4429 Local/Makefile (with some defaults set). These are used in built scripts
4430 such as exicyclog, but they have never been used in the exim_install
4431 script (though there are many overriding facilities there). I have
4432 arranged that the exim_install script now takes note of these two
4435 PH/35 Installed configuration files for Dragonfly.
4437 PH/36 When a locally submitted message by a trusted user did not contain a
4438 From: header, and the sender address was obtained from -f or from an SMTP
4439 MAIL command, and the trusted user did not use -F to supply a sender
4440 name, $originator_name was incorrectly used when constructing a From:
4441 header. Furthermore, $originator_name was used for submission mode
4442 messages from external hosts without From: headers in a similar way,
4443 which is clearly wrong.
4445 PH/37 Added control=suppress_local_fixups.
4447 PH/38 When log_selector = +received_sender was set, and the addition of the
4448 sender made the log line's construction buffer exactly full, or one byte
4449 less than full, an overflow happened when the terminating "\n" was
4452 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4453 when the result of a list match is failure because a DNS lookup failed.
4455 PH/40 RM_COMMAND is now used in the building process.
4457 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4458 the "build-* directories that it finds.
4460 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4461 address in a domain literal was a prefix of an interface address.
4463 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4464 when verifying a sender address, unless rewrite_headers is false.
4466 PH/44 Wrote a long comment about why errors_to addresses are verified as
4467 recipients, not senders.
4469 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4470 the ratelimit ACL was added.
4472 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4474 PH/46 Added extra information about PostgreSQL errors to the error string.
4476 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4477 avoiding the need to install special zones in a real server. This is
4478 backwards compatible; if it can't find the fake resolver, it drops back.
4479 Thus, both old and new test suites can be run.
4481 TF/02 Added util/ratelimit.pl
4483 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4484 clock is set back in time.
4486 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4487 Candler <B.Candler@pobox.com>.
4489 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4490 OK for addresses that are the result of redirections.
4492 PH/48 A number of further additions for the benefit of the new test suite,
4493 including a fake gethostbyname() that interfaces to the fake DNS resolver
4496 TF/06 The fix for widen_domains has also been applied to qualify_single and
4497 search_parents which are the other dnslookup options that can cause
4500 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4503 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4505 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4506 service" if it encountered an MX record with an empty target hostname.
4507 The message is now "an MX or SRV record indicated no SMTP service".
4509 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4510 if the DNS of the sending site is misconfigured. This is quite a
4511 common situation. This change restores the behaviour of treating a
4512 helo verification defer as a failure.
4514 PH/51 If self=fail was set on a router, the bounce message did not include the
4515 actual error message.
4521 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4523 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4524 command itself ended in error, the underlying message about the transport
4525 filter timeout was being overwritten with the pipe command error. Now the
4526 underlying error message should be appended to the second error message.
4528 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4530 PH/02 Reduce the amount of output that "make" produces by default. Full output
4531 can still be requested.
4533 PH/03 The warning log line about a condition test deferring for a "warn" verb
4534 was being output only once per connection, rather than after each
4535 occurrence (because it was using the same function as for successful
4536 "warn" verbs). This seems wrong, so I have changed it.
4538 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4539 it should not have, which might have caused a crash in the right
4540 circumstances, but probably never did.
4542 PH/04 Installed a modified version of Tony Finch's patch to make submission
4543 mode fix the return path as well as the Sender: header line, and to
4544 add a /name= option so that you can make the user's friendly name appear
4547 TF/03 Added the control = fakedefer ACL modifier.
4549 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4550 Mark Lowes for thorough testing.
4552 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4554 TK/03 Merged latest SRS patch from Miles Wilton.
4556 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4557 with the definition in sysexits.h (which is #included earlier).
4558 Fortunately, Exim does not actually use EX_OK. The code used to try to
4559 preserve the sysexits.h value, by assuming that macro definitions were
4560 scanned for macro replacements. I have been disabused of this notion,
4561 so now the code just undefines EX_OK before #including unistd.h.
4563 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4564 in the smtp transport. When a block could not be written in a single
4565 write() function, the timeout was being re-applied to each part-write.
4566 This seems wrong - if the receiver was accepting one byte at a time it
4567 would take for ever. The timeout is now adjusted when this happens. It
4568 doesn't have to be particularly precise.
4570 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4571 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4573 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4574 without a domain if the check to <postmaster@domain> fails.
4576 SC/01 Eximstats: added -xls and the ability to specify output files
4577 (patch written by Frank Heydlauf).
4579 SC/02 Eximstats: use FileHandles for outputting results.
4581 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4583 SC/04 Eximstats: fixed display of large numbers with -nvr option
4585 SC/05 Eximstats: fixed merging of reports with empty tables.
4587 SC/06 Eximstats: added the -include_original_destination flag
4589 SC/07 Eximstats: removed tabs and trailing whitespace.
4591 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4593 TK/06 MBOX spool code: Add real "From " MBOX separator line
4594 so the .eml file is really in mbox format (even though
4595 most programs do not really care). Patch from Alex Miller.
4597 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4598 The latter is generated from $received_to and is only set if the
4599 message has one envelope recipient. SA can use these headers,
4600 obviously out-of-the-box. Patch from Alex Miller.
4602 PH/08 The ${def test on a variable was returning false if the variable's
4603 value was "0", contrary to what the specification has always said!
4604 The result should be true unless the variable is empty.
4606 PH/09 The syntax error of a character other than { following "${if
4607 def:variable_name" (after optional whitespace) was not being diagnosed.
4608 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4609 accidental colon was present, for example, could give incorrect results.
4611 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4612 result is used (not including appendfile, where other changes are about
4615 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4616 This involved changing a lot of size variables from int to off_t. It
4617 should work with maildirs and everything.
4619 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4620 spamd dying while we are connected to it.
4622 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4625 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4626 function for BDB 4.3.
4628 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4630 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4631 the sources for PCRE have been re-arranged and more files are now
4634 PH/15 The code I had for printing potentially long long variables in PH/11
4635 above was not the best (it lost precision). The length of off_t variables
4636 is now inspected at build time, and an appropriate printing format (%ld
4637 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4638 to be "long long int" or "long int". This is needed for the internal
4639 formatting function string_vformat().
4641 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4642 the configuration file to be ":syslog", then the script "guesses" where
4643 the logs files are, rather than using the compiled in default. In our
4644 case the guess is not the same as the compiled default, so the script
4645 suddenly stopped working when I started to use syslog. The patch checks
4646 to see if log_file_path is "". If so, it attempts to read it from exim
4647 with no configuration file to get the compiled in version, before it
4648 falls back to the previous guessing code."
4650 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4651 implementing BATV in an Exim configuration. See NewStuff for the gory
4654 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4655 Makefile that are specific to HP-UX.
4657 PH/18 If the "use_postmaster" option was set for a recipient callout together
4658 with the "random" option, the postmaster address was used as the MAIL
4659 FROM address for the random test, but not for the subsequent recipient
4660 test. It is now used for both.
4662 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4663 patch removes a few documentation additions to RFC 3028, because the
4664 latest draft now contains them. It adds the new en;ascii-case comparator
4665 and a new error check for 8bit text in MIME parts. Comparator and
4666 require names are now matched exactly. I enabled the subaddress
4667 extension, but it is not well tested yet (read: it works for me)."
4669 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4670 rework some of the code of TK/09 above to avoid the hardwired use of
4671 "%lld" and "long long". Replaced the call to snprintf() with a call to
4674 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4675 records point to non-existent hosts", "retry timeout exceeded", and
4676 "retry time not reached for any host after a long failure period".
4678 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4679 experimental DomainKeys support:
4681 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4682 (2) On an error such as an illegally used "control", the wrong name for
4683 the control was given.
4685 These problems did NOT occur unless DomainKeys support was compiled.
4687 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4689 PH/24 Added ${if match_ip condition.
4691 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4692 databases so that it will be absolutely obvious if a crash occurs in the
4693 DB library. This is a regular occurrence (often caused by mis-matched
4696 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4697 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4698 picked up on a user's system that detects such things. There doesn't seem
4699 to be a gcc warning option for this - only an attribute that has to be
4700 put on the function's prototype. It seems that in Fedora Core 4 they have
4701 set this on a number of new functions. No doubt there will be more in due
4704 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4705 specify a transport. However, if an address that was verified by such a
4706 router was the subject of a callout, Exim crashed because it tried to
4707 read the rcpt_include_affixes from the non-existent transport. Now it
4708 just assumes that the setting of that option is false. This bug was
4709 introduced by 4.51/PH/31.
4711 PH/28 Changed -d+all to exclude +memory, because that information is very
4712 rarely of interest, but it makes the output a lot bigger. People tend to
4713 do -d+all out of habit.
4715 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4716 code in os-type was giving problems when libc.so lives in lib64, like on
4719 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4720 aren't the modern standard, and it seems that some systems' include files
4721 don't always have them. Exim was already checking for some of the newer
4722 ones like T_AAAA, and defining it itself. I've added checks for all the
4723 record types that Exim uses.
4725 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4726 not automatically generating a new one, as it is supposed to. This
4727 prevented TLS from working. If the file did exist, but contained invalid
4728 data, a new version was generated, as expected. It was only the case of a
4729 non-existent file that was broken.
4731 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4732 with a change in libdomainkeys > 0.64.
4734 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4735 from DNS. If the selector record carries the flag, it now has
4736 precedence over the domain-wide flag.
4738 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4740 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4741 the use of a port name that isn't defined in /etc/services) occurred, the
4742 message was deferred as in a normal delivery, and thus remained on the
4743 spool, instead of being failed because of the mua_wrapper setting. This
4744 is now fixed, and I tidied up some of the mua_wrapper messages at the
4747 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4748 the messages in a hash of arrays rather than using individual hashes.
4749 This is a bit cleaner and results in dramatic memory savings, albeit
4750 at a slight CPU cost.
4752 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4753 as requested by Marc Sherman.
4755 SC/10 Eximstats: added histograms for user specified patterns as requested
4758 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4760 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4761 fopen() in the content-scanning modules that did not already have it.
4767 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4768 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4770 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4772 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4774 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4775 to test Sieve filters that use "vacation".
4777 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4778 that changes the way the GnuTLS parameters are stored in the cache file.
4779 The new format can be generated externally. For backward compatibility,
4780 if the data in the cache doesn't make sense, Exim assumes it has read an
4781 old-format file, and it generates new data and writes a new file. This
4782 means that you can't go back to an older release without removing the
4785 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4786 work if there are any delivery delays because "one_time" forces the
4787 parent to be marked "delivered", so its unseen clone is never tried
4788 again. For this reason, Exim now forbids the simultaneous setting of
4791 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4792 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4793 entry if you want to know the details. The fix, however, neglected to
4794 consider the case when local delivery batching is involved. The test for
4795 "previously delivered" was not happening when checking to see if an
4796 address could be batched with a previous (undelivered) one; under
4797 certain circumstances this could lead to multiple deliveries to the same
4800 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4801 in its include files, and this causes problems building Exim.
4803 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4804 header_syntax) but Exim was just ignoring anything given after a slash.
4805 In particular, this caused confusion with an attempt to use "verify =
4806 reverse_host_lookup/defer_ok". An error is now given when options are
4807 supplied for verify items that do not have them. (Maybe reverse_host_
4808 lookup should have a defer_ok option, but that's a different point.)
4810 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4811 defined by RFC 821) to 2048, because there were problems with some AUTH
4812 commands, and RFC 1869 says the size should be increased for extended
4813 SMTP commands that take arguments.
4815 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4818 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4819 "unknown" error; now it says that the functionality isn't in the binary.
4821 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4822 an address' error message when a string expansion fails (syntax or
4823 whatever). Otherwise the password may appear in the log. Following change
4824 PH/42 below, there is no longer a chance of it appearing in a bounce
4827 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4829 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4830 of its addresses was ever tried. (Bugzilla bug #2.)
4832 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4833 the result incorrectly in the debug output. (It correctly added a newline
4834 to what was transported.)
4836 TF/01 Added $received_time.
4838 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4839 commented out examples of how to interface to a virus scanner and to
4840 SpamAssassin. Also added commented examples of av_scanner and
4841 spamd_address settings.
4843 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4844 and controls are allowed in which ACLs. There were a couple of minor
4845 errors. Some of the entries in the conditions table (which is a table of
4846 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4847 negation of where the condition IS allowed.
4849 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4851 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4852 header file does not have a version number, so I've had to invent a new
4853 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4854 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4855 radiusclient), but it was contributed by a Radius user.
4857 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4858 files or directories, for OpenSSL.
4860 PH/19 When an Exim process that is running as root has to create an Exim log
4861 file, it does so in a subprocess that runs as exim:exim so as to get the
4862 ownership right at creation (otherwise, other Exim processes might see
4863 the file with the wrong ownership). There was no test for failure of this
4864 fork() call, which would lead to the process getting stuck as it waited
4865 for a non-existent subprocess. Forks do occasionally fail when resources
4866 run out. I reviewed all the other calls to fork(); they all seem to check
4869 PH/20 When checking for unexpected SMTP input at connect time (before writing
4870 the banner), Exim was not dealing correctly with a non-positive return
4871 from the read() function. If the client had disconnected by this time,
4872 the result was a log entry for a synchronization error with an empty
4873 string after "input=" when read() returned zero. If read() returned -1
4874 (an event I could not check), uninitialized data bytes were printed.
4875 There were reports of junk text (parts of files, etc) appearing after
4878 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4880 PH/22 Added support for macro redefinition, and (re)definition in between
4881 driver and ACL definitions.
4883 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4884 forgetting to use the resulting value; it was using the unexpanded value.
4886 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4887 hadn't been configured. The fix is from Juergen Kreileder, who
4888 understands it better than I do:
4890 "Here's what I see happening with three configured cyrus_sasl
4891 authenticators configured (plain, login, cram-md5):
4893 On startup auth_cyrus_sasl_init() gets called for each of these.
4894 This means three calls to sasl_listmech() without a specified mech_list.
4895 => SASL tests which mechs of all available mechs actually work
4896 => three warnings about OTP not working
4897 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4899 With the patch, sasl_listmech() also gets called three times. But now
4900 SASL's mech_list option is set to the server_mech specified in the the
4901 authenticator. Or in other words, the answer from sasl_listmech()
4902 gets limited to just the mech you're testing for (which is different
4904 => the return list contains just 'plain' or 'login', 'cram-md5' or
4905 nothing depending on the value of ob->server_mech.
4907 I've just tested the patch: Authentication still works fine,
4908 unavailable mechs specified in the exim configuration are still
4909 caught, and the auth.log warnings about OTP are gone."
4911 PH/25 When debugging is enabled, the contents of the command line are added
4912 to the debugging output, even when log_selector=+arguments is not
4915 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4916 answer is "GNU", and only if the return is "GNU/something" is the answer
4919 PH/27 $acl_verify_message is now set immediately after the failure of a
4920 verification in an ACL, and so is available in subsequent modifiers. In
4921 particular, the message can be preserved by coding like this:
4923 warn !verify = sender
4924 set acl_m0 = $acl_verify_message
4926 Previously, $acl_verify_message was set only while expanding "message"
4927 and "log_message" when a very denied access.
4929 PH/28 Modified OS/os.c-Linux with
4931 -#ifndef OS_LOAD_AVERAGE
4932 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4934 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4935 nomenclature these days.)
4937 PH/29 Installed patch from the Sieve maintainer that adds the options
4938 sieve_useraddress and sieve_subaddress to the redirect router.
4940 PH/30 In these circumstances:
4941 . Two addresses routed to the same list of hosts;
4942 . First host does not offer TLS;
4943 . First host accepts first address;
4944 . First host gives temporary error to second address;
4945 . Second host offers TLS and a TLS session is established;
4946 . Second host accepts second address.
4947 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4948 and peerdn, if requested) that were in fact used only for the second
4951 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4952 attention to any local part prefix or suffix that was matched by the
4953 router that accepted the address. It now behaves in the same way as it
4954 does for delivery: the affixes are removed from the local part unless
4955 rcpt_include_affixes is set on the transport.
4957 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4958 timeout during the DATA phase of an incoming message.
4960 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4961 applied a patch sanctioned by the Sieve maintainer.
4963 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4964 the uid or gid is negative. A case of a negative gid caused this to be
4965 noticed. The fix allows for either to be negative.
4967 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4968 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4971 PH/36 The change PH/12 above was broken. Fixed it.
4973 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4974 the grounds that routing the same address twice would always produce the
4975 same answer. This might have been true once, but it is certainly no
4976 longer true now. Routing a child address may depend on the previous
4977 routing that produced that child. Some complicated redirection strategies
4978 went wrong when messages had multiple recipients, and made Exim's
4979 behaviour dependent on the order in which the addresses were given.
4981 I have moved the duplicate checking until after the routing is complete.
4982 Exim scans the addresses that are assigned to local and remote
4983 transports, and removes any duplicates. This means that more work will be
4984 done, as duplicates will always all be routed, but duplicates are
4985 presumably rare, so I don't expect this is of any significance.
4987 For deliveries to pipes, files, and autoreplies, the duplicate checking
4988 still happens during the routing process, since they are not going to be
4991 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4992 It corrects a timeout issue with spamd. This is Ian's comment: "The
4993 background is that sometimes spamd either never reads data from a
4994 connection it has accepted, or it never writes response data. The exiscan
4995 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4996 blindly assumes that writes won't block so it may never time out."
4998 PH/39 Allow G after quota size as well as K and M.
5000 PH/40 The value set for $authenticated_id in an authenticator may not contain
5001 binary zeroes or newlines because the value is written to log lines and
5002 to spool files. There was no check on this. Now the value is run through
5003 the string_printing() function so that such characters are converted to
5004 printable escape sequences.
5006 PH/41 $message_linecount is a new variable that contains the total number of
5007 lines in the message. Compare $body_linecount, which is the count for the
5010 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5011 bounce and delay warning messages, except in certain special cases, which
5014 (a) An SMTP error message from a remote host;
5015 (b) A message specified in a :fail: redirection;
5016 (c) A message specified in a "fail" command in a system filter;
5017 (d) A message specified in a FAIL return from the queryprogram router;
5018 (e) A message specified by the cannot_route_message router option.
5020 In these cases only, Exim does include the error details in bounce and
5021 warning messages. There are also a few cases where bland messages such
5022 as "unrouteable address" or "local delivery error" are given.
5024 PH/43 $value is now also set for the "else" part of a ${run expansion.
5026 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5027 being worked on, but at least Exim now implements the latest version to
5030 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5031 process to complete was treated as a delivery failure, a timeout while
5032 writing the message to the pipe was logged, but erroneously treated as a
5033 successful delivery. Such timeouts include transport filter timeouts. For
5034 consistency with the overall process timeout, these timeouts are now
5035 treated as errors, giving rise to delivery failures by default. However,
5036 there is now a new Boolean option for the pipe transport called
5037 timeout_defer, which, if set TRUE, converts the failures into defers for
5038 both kinds of timeout. A transport filter timeout is now identified in
5041 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5042 systems where "make" and "gmake" are different, calling "gmake" at top
5043 level broke things. I've arranged for the value of $(MAKE) to be passed
5044 from the Makefile to this script so that it can call the same version of
5048 A note about Exim versions 4.44 and 4.50
5049 ----------------------------------------
5051 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5052 changes of various kinds. As a consequence, a big documentation update was
5053 needed. This delayed the release for rather longer than seemed good, especially
5054 in the light of a couple of (minor) security issues. Therefore, the changes
5055 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5056 release. So 4.44 and 4.50 are in effect two different branches that both start
5059 I have left the 4.50 change log unchanged; it contains all the changes since
5060 4.43. The change log for 4.44 is below; many of its items are identical to
5061 those for 4.50. This seems to be the most sensible way to preserve the
5062 historical information.
5068 1. Minor wording change to the doc/README.SIEVE file.
5070 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5071 computation of the current number of files was incorrect.
5073 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5074 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5077 4. Give more explanation in the error message when the command for a transport
5078 filter fails to execute.
5080 5. There are several places where Exim runs a non-Exim command in a
5081 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5082 was being done only for the command run by the queryprogram router. It is
5083 now done for all such subprocesses. The other cases are: ${run, transport
5084 filters, and the commands run by the lmtp and pipe transports.
5086 6. Added CONFIGURE_GROUP build-time option.
5088 7. Some older OS have a limit of 256 on the maximum number of file
5089 descriptors. Exim was using setrlimit() to set 1000 as a large value
5090 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5091 systems. I've change it so that if it can't get 1000, it tries for 256.
5093 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5094 was an oversight, and furthermore, ever since the addition of extra
5095 controls (e.g. 4.43/32), the checks on when to allow different forms of
5096 "control" were broken. There should now be diagnostics for all cases when a
5097 control that does not make sense is encountered.
5099 9. Added the /retain_sender option to "control=submission".
5101 10. $recipients is now available in the predata ACL (oversight).
5103 11. Tidy the search cache before the fork to do a delivery from a message
5104 received from the command line. Otherwise the child will trigger a lookup
5105 failure and thereby defer the delivery if it tries to use (for example) a
5106 cached ldap connection that the parent has called unbind on.
5108 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5109 of $address_data from the recipient verification was clobbered by the
5110 sender verification.
5112 13. The value of address_data from a sender verification is now available in
5113 $sender_address_data in subsequent conditions in the ACL statement.
5115 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5117 15. Added a new option "connect=<time>" to callout options, to set a different
5120 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5121 was its contents. (It was OK if the option was not defined at all.)
5123 17. A "Completed" log line is now written for messages that are removed from
5124 the spool by the -Mrm option.
5126 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5127 information about exactly what failed.
5129 19. Added -dd to debug only the daemon process.
5131 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5132 handles timeouts, both on the server side and network timeouts. Renamed the
5133 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5135 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5136 It is now set to "smtps".
5138 22. $host_address is now set to the target address during the checking of
5139 ignore_target_hosts.
5141 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5142 being passed; this would have caused $sender_host_name to have been used if
5143 matching the list had actually called for a host name (not very likely,
5144 since this list is usually IP addresses). A host name is now passed as
5147 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5148 code that specifies a non-restarting handler (typically sigaction() in
5149 modern systems) in an attempt to fix a rare and obscure crash bug.
5151 25. Narrowed the window for a race in the daemon that could cause it to ignore
5152 SIGCHLD signals. This is not a major problem, because they are used only to
5153 wake it up if nothing else does.
5155 26. A malformed maildirsize file could cause Exim to calculate negative values
5156 for the mailbox size or file count. Odd effects could occur as a result.
5157 The maildirsize information is now recalculated if the size or filecount
5160 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5161 support for a long time. Removed HAVE_SYS_VFS_H.
5163 28. Installed the latest version of exipick from John Jetmore.
5165 29. In an address list, if the pattern was not a regular expression, an empty
5166 subject address (from a bounce message) matched only if the pattern was an
5167 empty string. Non-empty patterns were not even tested. This was the wrong
5168 because it is perfectly reasonable to use an empty address as part of a
5169 database query. An empty address is now tested by patterns that are
5170 lookups. However, all the other forms of pattern expect the subject to
5171 contain a local part and a domain, and therefore, for them, an empty
5172 address still always fails if the pattern is not itself empty.
5174 30. Exim went into a mad DNS loop when attempting to do a callout where the
5175 host was specified on an smtp transport, and looking it up yielded more
5176 than one IP address.
5178 31. Re-factored the code for checking spool and log partition space into a
5179 function that finds that data and another that does the check. The former
5180 is then used to implement four new variables: $spool_space, $log_space,
5181 $spool_inodes, and $log_inodes.
5183 32. The RFC2047 encoding function was originally intended for short strings
5184 such as real names; it was not keeping to the 75-character limit for
5185 encoded words that the RFC imposes. It now respects the limit, and
5186 generates multiple encoded words if necessary. To be on the safe side, I
5187 have increased the buffer size for the ${rfc2047: expansion operator from
5190 33. It is now permitted to omit both strings after an "if" condition; if the
5191 condition is true, the result is "true". As before, when the second string
5192 is omitted, a false condition yields an empty string. This makes it less
5193 cumbersome to write custom ACL and router conditions.
5195 34. Failure to deliver a bounce message always caused it to be frozen, even if
5196 there was an errors_to setting on the router. The errors_to setting is now
5199 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5200 canonical form (fully expanded) before being placed in
5201 $sender_host_address.
5203 36. The table in the code that translates DNS record types into text (T_A to
5204 "A" for instance) was missing entries for NS and CNAME. It is just possible
5205 that this could have caused confusion if both these types were looked up
5206 for the same domain, because the text type is used as part of Exim's
5207 per-process caching. But the chance of anyone hitting this buglet seems
5210 37. The dnsdb lookup has been extended in a number of ways.
5212 (1) There is a new type, "zns", which walks up the domain tree until it
5213 finds some nameserver records. It should be used with care.
5215 (2) There is a new type, "mxh", which is like "mx" except that it returns
5216 just the host names, not the priorities.
5218 (3) It is now possible to give a list of domains (or IP addresses) to be
5219 looked up. The behaviour when one of the lookups defers can be
5220 controlled by a keyword.
5222 (4) It is now possible to specify the separator character for use when
5223 multiple records are returned.
5225 38. The dnslists ACL condition has been extended: it is now possible to supply
5226 a list of IP addresses and/or domains to be looked up in a particular DNS
5229 39. Added log_selector=+queue_time_overall.
5231 40. When running the queue in the test harness, wait just a tad after forking a
5232 delivery process, to get repeatability of debugging output.
5234 41. Include certificate and key file names in error message when GnuTLS fails
5235 to set them up, because the GnuTLS error message doesn't include the name
5236 of the failing file when there is a problem reading it.
5238 42. Allow both -bf and -bF in the same test run.
5240 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5242 44. The "Exiscan patch" is now merged into the mainline Exim source.
5244 45. Sometimes the final signoff response after QUIT could fail to get
5245 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5246 < 0 before doing a fflush(). This bug looks as though it goes back to the
5247 introduction of TLS in release 3.20, but "sometimes" must have been rare
5248 because the tests only now provoked it.
5250 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5251 (this can affect the format of dates).
5253 47. exim_tidydb, when checking for the continued existence of a message for
5254 which it has found a message-specific retry record, was not finding
5255 messages that were in split spool directories. Consequently, it was
5256 deleting retry records that should have stayed in existence.
5258 48. Steve fixed some bugs in eximstats.
5260 49. The SPA authentication driver was not abandoning authentication and moving
5261 on to the next authenticator when an expansion was forced to fail,
5262 contradicting the general specification for all authenticators. Instead it
5263 was generating a temporary error. It now behaves as specified.
5265 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5266 (the order specifies the preference for clients). The order is now AES256,
5267 AES128, 3DES, ARCFOUR128.
5269 51. Small patch to Sieve code - explicitly set From: when generating an
5272 52. Exim crashed if a remote delivery caused a very long error message to be
5273 recorded - for instance if somebody sent an entire SpamAssassin report back
5274 as a large number of 550 error lines. This bug was coincidentally fixed by
5275 increasing the size of one of Exim's internal buffers (big_buffer) that
5276 happened as part of the Exiscan merge. However, to be on the safe side, I
5277 have made the code more robust (and fixed the comments that describe what
5280 53. Now that there can be additional text after "Completed" in log lines (if
5281 the queue_time_overall log selector is set), a one-byte patch to exigrep
5282 was needed to allow it to recognize "Completed" as not the last thing in
5285 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5286 patch that reportedly fixes this has been added. I am not expert enough to
5287 create a test for it. This is what the patch creator wrote:
5289 "I found a little strange behaviour of ldap code when working with
5290 Windows 2003 AD Domain, where users was placed in more than one
5291 Organization Units. When I tried to give exim partial DN, the exit code
5292 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5293 But simultaneously result of request was absolutely normal ldap result,
5294 so I produce this patch..."
5296 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5297 REFERENCE, so I have modified the code to exclude the patch when that macro
5300 55. Some experimental protocols are using DNS PTR records for new purposes. The
5301 keys for these records are domain names, not reversed IP addresses. The
5302 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5303 leaves it alone. Component reversal etc. now happens only for IP addresses.
5306 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5308 57. Double the size of the debug message buffer (to 2048) so that more of very
5309 long debug lines gets shown.
5311 58. The exicyclog utility now does better if the number of log files to keep
5312 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5314 59. Two changes related to the smtp_active_hostname option:
5316 (1) $smtp_active_hostname is now available as a variable.
5317 (2) The default for smtp_banner uses $smtp_active_hostname instead
5318 of $primary_hostname.
5320 60. The host_aton() function is supposed to be passed a string that is known
5321 to be a valid IP address. However, in the case of IPv6 addresses, it was
5322 not checking this. This is a hostage to fortune. Exim now panics and dies
5323 if the condition is not met. A case was found where this could be provoked
5324 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5325 components; fortuitously, this particular loophole had already been fixed
5326 by change 4.50/55 above.
5328 If there are any other similar loopholes, the new check in host_aton()
5329 itself should stop them being exploited. The report I received stated that
5330 data on the command line could provoke the exploit when Exim was running as
5331 exim, but did not say which command line option was involved. All I could
5332 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5333 running as the user.
5336 61. There was a buffer overflow vulnerability in the SPA authentication code
5337 (which came originally from the Samba project). I have added a test to the
5338 spa_base64_to_bits() function which I hope fixes it.
5341 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5342 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5344 63. The daemon start-up calls getloadavg() while still root for those OS that
5345 need the first call to be done as root, but it missed one case: when
5346 deliver_queue_load_max is set with deliver_drop_privilege. This is
5347 necessary for the benefit of the queue runner, because there is no re-exec
5348 when deliver_drop_privilege is set.
5350 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5351 This has been fixed.
5353 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5354 was in use, was not putting the data itself into the right store pool;
5355 consequently, it could be overwritten for a subsequent message in the same
5356 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5359 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5361 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5362 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5363 the function were treating the return as a boolean value, which happened to
5364 work because 0=false and not-0=true, but is not correct code.
5366 68. The host_aton() function was not handling scoped IPv6 addresses (those
5367 with, for example, "%eth0" on the end) correctly.
5369 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5370 negated items (that is, ~something) in unsigned ints. Some compilers
5371 apparently mutter when there is no cast.
5373 70. If an address verification called from an ACL failed, and did not produce a
5374 user-specific message (i.e. there was only a "system" message), nothing was
5375 put in $acl_verify_message. In this situation, it now puts the system
5378 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5379 session; change 4.31/43 added the unwanted input to the log line - except
5380 that it did not do this in the start of session case. It now does.
5382 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5383 This is wrong and can cause the other end to generate a synchronization
5384 error if it is another Exim or anything else that does the synchronization
5385 check. A QUIT command is no longer sent after a timeout.
5387 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5388 during host lookups.
5390 74. The defer_ok option of callout verification was not working if it was used
5391 when verifying addresses in header lines, that is, for this case:
5393 verify = header_sender/callout=defer_ok
5395 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5396 those file descriptors could be used for SMTP connections. If anything
5397 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5398 could be sent to the SMTP client, causing chaos. The daemon now opens
5399 stdin, stdout, and stderr to /dev/null when it puts itself into the
5402 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5403 log by default. The user can override this with suitable Perl magic.
5405 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5406 the log message when discard triggers, was not working for the DATA ACL or
5407 for the non-SMTP ACL.
5409 78. Error message wording change in sieve.c.
5411 79. If smtp_accept_max_per_host was set, the number of connections could be
5412 restricted to fewer than expected, because the daemon was trying to set up
5413 a new connection before checking whether the processes handling previous
5414 connections had finished. The check for completed processes is now done
5415 earlier. On busy systems, this bug wouldn't be noticed because something
5416 else would have woken the daemon, and it would have reaped the completed
5419 80. If a message was submitted locally by a user whose login name contained one
5420 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5421 It caused a spool format error. I have fixed the spool reading code. A
5422 related problem was that the "from" clause in the Received: line became
5423 illegal because of the space(s). It is now covered by ${quote_local_part.
5425 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5428 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5430 83. Patch from Sieve maintainer to fix unterminated string problem in
5431 "vacation" handling.
5433 84. Some minor changes to the Linux configuration files to help with other
5434 OS variants using glibc.
5436 85. One more patch for Sieve to update vacation handling to latest spec.
5439 ----------------------------------------------------
5440 See the note above about the 4.44 and 4.50 releases.
5441 ----------------------------------------------------
5447 1. Change 4.43/35 introduced a bug that caused file counts to be
5448 incorrectly computed when quota_filecount was set in an appendfile
5451 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5452 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5455 3. Give more explanation in the error message when the command for a transport
5456 filter fails to execute.
5458 4. There are several places where Exim runs a non-Exim command in a
5459 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5460 was being done only for the command run by the queryprogram router. It is
5461 now done for all such subprocesses. The other cases are: ${run, transport
5462 filters, and the commands run by the lmtp and pipe transports.
5464 5. Some older OS have a limit of 256 on the maximum number of file
5465 descriptors. Exim was using setrlimit() to set 1000 as a large value
5466 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5467 systems. I've change it so that if it can't get 1000, it tries for 256.
5469 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5470 was an oversight, and furthermore, ever since the addition of extra
5471 controls (e.g. 4.43/32), the checks on when to allow different forms of
5472 "control" were broken. There should now be diagnostics for all cases when a
5473 control that does not make sense is encountered.
5475 7. $recipients is now available in the predata ACL (oversight).
5477 8. Tidy the search cache before the fork to do a delivery from a message
5478 received from the command line. Otherwise the child will trigger a lookup
5479 failure and thereby defer the delivery if it tries to use (for example) a
5480 cached ldap connection that the parent has called unbind on.
5482 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5483 of $address_data from the recipient verification was clobbered by the
5484 sender verification.
5486 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5487 was its contents. (It was OK if the option was not defined at all.)
5489 11. A "Completed" log line is now written for messages that are removed from
5490 the spool by the -Mrm option.
5492 12. $host_address is now set to the target address during the checking of
5493 ignore_target_hosts.
5495 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5496 being passed; this would have caused $sender_host_name to have been used if
5497 matching the list had actually called for a host name (not very likely,
5498 since this list is usually IP addresses). A host name is now passed as
5501 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5502 code that specifies a non-restarting handler (typically sigaction() in
5503 modern systems) in an attempt to fix a rare and obscure crash bug.
5505 15. Narrowed the window for a race in the daemon that could cause it to ignore
5506 SIGCHLD signals. This is not a major problem, because they are used only to
5507 wake it up if nothing else does.
5509 16. A malformed maildirsize file could cause Exim to calculate negative values
5510 for the mailbox size or file count. Odd effects could occur as a result.
5511 The maildirsize information is now recalculated if the size or filecount
5514 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5515 support for a long time. Removed HAVE_SYS_VFS_H.
5517 18. Updated exipick to current release from John Jetmore.
5519 19. Allow an empty sender to be matched against a lookup in an address list.
5520 Previously the only cases considered were a regular expression, or an
5523 20. Exim went into a mad DNS lookup loop when doing a callout where the
5524 host was specified on the transport, if the DNS lookup yielded more than
5527 21. The RFC2047 encoding function was originally intended for short strings
5528 such as real names; it was not keeping to the 75-character limit for
5529 encoded words that the RFC imposes. It now respects the limit, and
5530 generates multiple encoded words if necessary. To be on the safe side, I
5531 have increased the buffer size for the ${rfc2047: expansion operator from
5534 22. Failure to deliver a bounce message always caused it to be frozen, even if
5535 there was an errors_to setting on the router. The errors_to setting is now
5538 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5539 canonical form (fully expanded) before being placed in
5540 $sender_host_address.
5542 24. Updated eximstats to version 1.33
5544 25. Include certificate and key file names in error message when GnuTLS fails
5545 to set them up, because the GnuTLS error message doesn't include the name
5546 of the failing file when there is a problem reading it.
5548 26. Expand error message when OpenSSL has problems setting up cert/key files.
5551 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5552 (this can affect the format of dates).
5554 28. exim_tidydb, when checking for the continued existence of a message for
5555 which it has found a message-specific retry record, was not finding
5556 messages that were in split spool directories. Consequently, it was
5557 deleting retry records that should have stayed in existence.
5559 29. eximstats updated to version 1.35
5560 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5561 1.35 - bugfix such that pie charts by volume are generated correctly
5563 30. The SPA authentication driver was not abandoning authentication and moving
5564 on to the next authenticator when an expansion was forced to fail,
5565 contradicting the general specification for all authenticators. Instead it
5566 was generating a temporary error. It now behaves as specified.
5568 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5569 (the order specifies the preference for clients). The order is now AES256,
5570 AES128, 3DES, ARCFOUR128.
5572 31. Small patch to Sieve code - explicitly set From: when generating an
5575 32. Exim crashed if a remote delivery caused a very long error message to be
5576 recorded - for instance if somebody sent an entire SpamAssassin report back
5577 as a large number of 550 error lines. This bug was coincidentally fixed by
5578 increasing the size of one of Exim's internal buffers (big_buffer) that
5579 happened as part of the Exiscan merge. However, to be on the safe side, I
5580 have made the code more robust (and fixed the comments that describe what
5583 33. Some experimental protocols are using DNS PTR records for new purposes. The
5584 keys for these records are domain names, not reversed IP addresses. The
5585 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5586 leaves it alone. Component reversal etc. now happens only for IP addresses.
5589 34. The host_aton() function is supposed to be passed a string that is known
5590 to be a valid IP address. However, in the case of IPv6 addresses, it was
5591 not checking this. This is a hostage to fortune. Exim now panics and dies
5592 if the condition is not met. A case was found where this could be provoked
5593 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5594 components; fortuitously, this particular loophole had already been fixed
5595 by change 4.50/55 or 4.44/33 above.
5597 If there are any other similar loopholes, the new check in host_aton()
5598 itself should stop them being exploited. The report I received stated that
5599 data on the command line could provoke the exploit when Exim was running as
5600 exim, but did not say which command line option was involved. All I could
5601 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5602 running as the user.
5605 35. There was a buffer overflow vulnerability in the SPA authentication code
5606 (which came originally from the Samba project). I have added a test to the
5607 spa_base64_to_bits() function which I hope fixes it.
5610 36. The daemon start-up calls getloadavg() while still root for those OS that
5611 need the first call to be done as root, but it missed one case: when
5612 deliver_queue_load_max is set with deliver_drop_privilege. This is
5613 necessary for the benefit of the queue runner, because there is no re-exec
5614 when deliver_drop_privilege is set.
5616 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5617 was in use, was not putting the data itself into the right store pool;
5618 consequently, it could be overwritten for a subsequent message in the same
5619 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5622 38. Sometimes the final signoff response after QUIT could fail to get
5623 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5624 < 0 before doing a fflush(). This bug looks as though it goes back to the
5625 introduction of TLS in release 3.20, but "sometimes" must have been rare
5626 because the tests only now provoked it.
5632 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5633 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5634 Now it returns an integer. A number of calls were still expecting a T/F
5635 return. Fortuitously, in all cases, the tests worked in OK situations,
5636 which is the norm. However, things would have gone wrong on any write
5637 failures on the smtp file descriptor. This function is used when sending
5638 messages over SMTP and also when doing verify callouts.
5640 2. When Exim is called to do synchronous delivery of a locally submitted
5641 message (the -odf or -odi options), it no longer closes stderr before doing
5644 3. Implemented the mua_wrapper option.
5646 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5648 5. Implemented the functions header_remove(), header_testname(),
5649 header_add_at_position(), and receive_remove_recipient(), and exported them
5652 6. If an ACL "warn" statement specified the addition of headers, Exim already
5653 inserted X-ACL-Warn: at the start if there was no header name. However, it
5654 was not making this test for the second and subsequent header lines if
5655 there were newlines in the string. This meant that an invalid header could
5656 be inserted if Exim was badly configured.
5658 7. Allow an ACL "warn" statement to add header lines at the start or after all
5659 the Received: headers, as well as at the end.
5661 8. Added the rcpt_4xx retry error code.
5663 9. Added postmaster_mailfrom=xxx to callout verification option.
5665 10. Added mailfrom=xxxx to the callout verification option, for verify=
5668 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5669 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5671 12. Inserted some casts to stop certain compilers warning when using pointer
5672 differences as field lengths or precisions in printf-type calls (mostly
5673 affecting debugging statements).
5675 13. Added optional readline() support for -be (dynamically loaded).
5677 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5678 same clock tick as a message's arrival, so that its received time was the
5679 same as the "first fail" time on the retry record, and that message
5680 remained on the queue past the ultimate address timeout, every queue runner
5681 would try a delivery (because it was past the ultimate address timeout) but
5682 after another failure, the ultimate address timeout, which should have then
5683 bounced the address, did not kick in. This was a "< instead of <=" error;
5684 in most cases the first failure would have been in the next clock tick
5685 after the received time, and all would be well.
5687 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5688 being recognized when the domain list was tested by the match_domain
5689 condition in an expansion string.
5691 16. Added the ${str2b64: operator.
5693 17. Exim was always calling setrlimit() to set a large limit for the number of
5694 processes, without checking whether the existing limit was already
5695 adequate. (It did check for the limit on file descriptors.) Furthermore,
5696 errors from getrlimit() and setrlimit() were being ignored. Now they are
5697 logged to the main and panic logs, but Exim does carry on, to try to do its
5698 job under whatever limits there are.
5700 18. Imported PCRE 5.0.
5702 19. Trivial typo in log message " temporarily refused connection" (the leading
5705 20. If the log selector return_path_on_delivery was set and an address was
5706 redirected to /dev/null, the delivery process crashed because it assumed
5707 that a return path would always be set for a "successful" delivery. In this
5708 case, the whole delivery is bypassed as an optimization, and therefore no
5711 21. Internal re-arrangement: the function for sending a challenge and reading
5712 a response while authentication was assuming a zero-terminated challenge
5713 string. It's now changed to take a pointer and a length, to allow for
5714 binary data in such strings.
5716 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5718 23. Exim was not respecting finduser_retries when seeking the login of the
5719 uid under which it was called; it was always trying 10 times. (The default
5720 setting of finduser_retries is zero.) Also, it was sleeping after the final
5721 failure, which is pointless.
5723 24. Implemented tls_on_connect_ports.
5725 25. Implemented acl_smtp_predata.
5727 26. If the domain in control=submission is set empty, Exim assumes that the
5728 authenticated id is a complete email address when it generates From: or
5729 Sender: header lines.
5731 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5732 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5733 chown and chgrp in /bin and hostname in /usr/bin.
5735 28. Exim was keeping the "process log" file open after each use, just as it
5736 does for the main log. This opens the possibility of it remaining open for
5737 long periods when the USR1 signal hits a daemon. Occasional processlog
5738 errors were reported, that could have been caused by this. Anyway, it seems
5739 much more sensible not to leave this file open at all, so that is what now
5742 29. The long-running daemon process does not normally write to the log once it
5743 has entered its main loop, and it closes the log before doing so. This is
5744 so that log files can straightforwardly be renamed and moved. However,
5745 there are a couple of unusual error situations where the daemon does write
5746 log entries, and I had neglected to close the log afterwards.
5748 30. The text of an SMTP error response that was received during a remote
5749 delivery was being truncated at 512 bytes. This is too short for some of
5750 the long messages that one sometimes sees. I've increased the limit to
5753 31. It is now possible to make retry rules that apply only when a message has a
5754 specific sender, in particular, an empty sender.
5756 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5757 it possible to be selective about when SMTP synchronization is enforced.
5759 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5761 32. Implemented hosts_connection_nolog.
5763 33. Added an ACL for QUIT.
5765 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5768 35. Added mailbox_size and mailbox_filecount to appendfile.
5770 36. Added control = no_multiline_responses to ACLs.
5772 37. There was a bug in the logic of the code that waits for the clock to tick
5773 in the case where the clock went backwards by a substantial amount such
5774 that the microsecond fraction of "now" was more than the microsecond
5775 fraction of "then" (but the whole seconds number was less).
5777 38. Added support for the libradius Radius client library this is found on
5778 FreeBSD (previously only the radiusclient library was supported).
5784 1. When certain lookups returned multiple values in the form name=value, the
5785 quoting of the values was not always being done properly. Specifically:
5786 (a) If the value started with a double quote, but contained no whitespace,
5788 (b) If the value contained whitespace other than a space character (i.e.
5789 tabs or newlines or carriage returns) it was not quoted.
5790 This fix has been applied to the mysql and pgsql lookups by writing a
5791 separate quoting function and calling it from the lookup code. The fix
5792 should probably also be applied to nisplus, ibase and oracle lookups, but
5793 since I cannot test any of those, I have not disturbed their existing code.
5795 2. A hit in the callout cache for a specific address caused a log line with no
5796 reason for rejecting RCPT. Now it says "Previous (cached) callout
5797 verification failure".
5799 3. There was an off-by-one bug in the queryprogram router. An over-long
5800 return line was truncated at 256 instead of 255 characters, thereby
5801 overflowing its buffer with the terminating zero. As well as fixing this, I
5802 have increased the buffer size to 1024 (and made a note to document this).
5804 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5805 when Exim is waiting for an SMTP response from a remote server, Exim
5806 restarts its select() call on the socket, thereby resetting its timeout.
5807 This is not a problem when such interrupts are rare. Somebody set up a cron
5808 job to run exiwhat every 2 minutes, which is less than the normal select()
5809 timeout (5 or 10 minutes). This meant that the select() timeout never
5810 kicked in because it was always reset. I have fixed this by comparing the
5811 time when an interrupt arrives with the time at the start of the first call
5812 to select(). If more time than the timeout has elapsed, the interrupt is
5813 treated as a timeout.
5815 5. Some internal re-factoring in preparation for the addition of Sieve
5816 extensions (by MH). In particular, the "personal" test is moved to a
5817 separate function, and given an option for scanning Cc: and Bcc: (which is
5818 not set for Exim filters).
5820 6. When Exim created an email address using the login of the caller as the
5821 local part (e.g. when creating a From: or Sender: header line), it was not
5822 quoting the local part when it contained special characters such as @.
5824 7. Installed new OpenBSD configuration files.
5826 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5827 try to make them clearer.
5829 9. Callout options, other than the timeout value, were being ignored when
5830 verifying sender addresses in header lines. For example, when using
5832 verify = header_sender/callout=no_cache
5834 the cache was (incorrectly) being used.
5836 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5837 only the Cygwin environment.
5839 11. When return_path_on_delivery was set as a log selector, if different remote
5840 addresses in the same message used different return paths and parallel
5841 remote delivery occurred, the wrong values would sometimes be logged.
5842 (Whenever a remote delivery process finished, the return path value from
5843 the most recently started remote delivery process was logged.)
5845 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5846 lines when AUTH and/or TLS are in use. This is the "received protocol"
5847 field. Exim used to use "asmtp" for authenticated SMTP, without any
5848 indication (in the protocol name) for TLS use. Now it follows the RFC and
5849 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5850 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5851 names appear in log lines as well as in Received: header lines.
5853 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5854 extensions, and comparison tests, and to fix some bugs.
5856 14. Changes to the "personal" filter test:
5858 (1) The test was buggy in that it was just doing the equivalent of
5859 "contains" tests on header lines. For example, if a user's address was
5860 anne@some.where, the "personal" test would incorrectly be true for
5862 To: susanne@some.where
5864 This test is now done by extracting each address from the header in turn,
5865 and checking the entire address. Other tests that are part of "personal"
5866 are now done using regular expressions (for example, to check local parts
5867 of addresses in From: header lines).
5869 (2) The list of non-personal local parts in From: addresses has been
5870 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5871 taken from the Sieve specification recommendations.
5873 (3) If the message contains any header line starting with "List-" it is
5874 treated as non-personal.
5876 (4) The test for "circular" in the Subject: header line has been removed
5877 because it now seems ill-conceived.
5879 15. Minor typos in src/EDITME comments corrected.
5881 16. Installed latest exipick from John Jetmore.
5883 17. If headers_add on a router specified a text string that was too long for
5884 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5885 of string_sprintf() is now avoided.
5887 18. $message_body_size was not set (it was always zero) when running the DATA
5888 ACL and the local_scan() function.
5890 19. For the "mail" command in an Exim filter, no default was being set for
5891 the once_repeat time, causing a random time value to be used if "once" was
5892 specified. (If the value happened to be <= 0, no repeat happened.) The
5893 default is now 0s, meaning "never repeat". The "vacation" command was OK
5894 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5895 (I found it when inspecting the code).
5897 20. There is now an overall timeout for performing a callout verification. It
5898 defaults to 4 times the callout timeout, which applies to individual SMTP
5899 commands during the callout. The overall timeout applies when there is more
5900 than one host that can be tried. The timeout is checked before trying the
5901 next host. This prevents very long delays if there are a large number of
5902 hosts and all are timing out (e.g. when the network connections are timing
5903 out). The value of the overall timeout can be changed by specifying an
5904 additional sub-option for "callout", called "maxwait". For example:
5906 verify = sender/callout=5s,maxwait=20s
5908 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5909 to the end before writing, but this should make it even safer).
5911 22. Exim was forgetting that it had advertised PIPELINING for the second and
5912 subsequent messages on an SMTP connection. It was also not resetting its
5913 memory on STARTTLS and an internal HELO.
5915 23. When Exim logs an SMTP synchronization error within a session, it now
5916 records whether PIPELINING has been advertised or not.
5918 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5919 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5920 rather than long int.
5922 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5924 26. Added the never_mail option to autoreply.
5930 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5931 crash if the getsockname() call failed; this can happen if a connection is
5932 closed very soon after it is established. The problem was simply in the
5933 order in which certain operations were done, causing Exim to try to write
5934 to the SMTP stream before it had set up the file descriptor. The bug has
5935 been fixed by making things happen in the correct order.
5941 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5942 before the connection was closed, thus losing the rejection response.
5944 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5945 some early Solaris releases, but causes trouble in current releases where
5946 socklen_t is defined.
5948 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5951 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5954 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5955 that releasing the top of it at the end releases what was used for sub-
5956 expansions (unless the block got too big). However, discard this block if
5957 the first thing is a variable or header, so that we can use its block when
5958 it is dynamic (useful for very large $message_headers, for example).
5960 6. Lookups now cache *every* query, not just the most recent. A new, separate
5961 store pool is used for this. It can be recovered when all lookup caches are
5962 flushed. Lookups now release memory at the end of their result strings.
5963 This has involved some general refactoring of the lookup sources.
5965 7. Some code has been added to the store_xxx() functions to reduce the amount
5966 of flapping under certain conditions.
5968 8. log_incoming_interface used to affect only the <= reception log lines. Now
5969 it causes the local interface and port to be added to several more SMTP log
5970 lines, for example "SMTP connection from", and rejection lines.
5972 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5974 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5976 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5977 could be overwritten at the end of the current message (or the start of a
5978 new message if it was set in a HELO ACL). The value is now preserved for
5979 the duration of the SMTP connection.
5981 12. If a transport had a headers_rewrite setting, and a matching header line
5982 contained an unqualified address, that address was qualified, even if it
5983 did not match any rewriting rules. The underlying bug was that the values
5984 of the flags that permit the existence of unqualified sender and recipient
5985 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5986 non-local messages, and by -bnq for local messages) were not being
5987 preserved with the message after it was received.
5989 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5990 "next input=" as part of the text comprising the host identity instead of
5991 the correct text. The code was using the same buffer for two different
5992 strings. However, depending on which order the printing function evaluated
5993 its arguments, the bug did not always show up. Under Linux, for example, my
5994 test suite worked just fine.
5996 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5997 doesn't work with some older versions of Perl. It has been changed to "my",
5998 which in any case is probably the better facility to use.
6000 15. A really picky compiler found some instances of statements for creating
6001 error messages that either had too many or two few arguments for the format
6004 16. The size of the buffer for calls to the DNS resolver has been increased
6005 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6006 for addresses that have a lot of PTR records. This alleviates a problem; it
6007 does not fully solve it.
6009 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6010 buffer now truncates the list and logs the incident, which is the same
6011 action as happens when Exim is looking up a host name and its aliases.
6012 Previously in this situation something unpredictable would happen;
6013 sometimes it was "internal error: store_reset failed".
6015 18. If a server dropped the connection unexpectedly when an Exim client was
6016 using GnuTLS and trying to read a response, the client delivery process
6017 crashed while trying to generate an error log message.
6019 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6020 string, for example:
6022 warn message = H1: something\nH2: something
6024 the text was added as a single header line from Exim's point of view
6025 though it ended up OK in the delivered message. However, searching for the
6026 second and subsequent header lines using $h_h2: did not work. This has been
6027 fixed. Similarly, if a system filter added multiple headers in this way,
6028 the routers could not see them.
6030 20. Expanded the error message when iplsearch is called with an invalid key to
6031 suggest using net-iplsearch in a host list.
6033 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6034 ACLs are no longer actually imposed (and a message to that effect is
6037 22. If a "gecos" field in a passwd entry contained escaped characters, in
6038 particular, if it contained a \" sequence, Exim got it wrong when building
6039 a From: or a Sender: header from that name. A second bug also caused
6040 incorrect handling when an unquoted " was present following a character
6041 that needed quoting.
6043 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6044 was not being matched caselessly.
6046 24. Arranged for all hyphens in the exim.8 source to be escaped with
6049 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6050 properly. Recipient callout cache records were still being keyed to include
6051 the sender, even when use_sender was set false. This led to far more
6052 callouts that were necessary. The sender is no longer included in the key
6053 when use_sender is false.
6055 26. Added "control = submission" modifier to ACLs.
6057 27. Added the ${base62d: operator to decode base 62 numbers.
6059 28. dnsdb lookups can now access SRV records.
6061 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6062 the configuration file.
6064 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6065 (-v) mode. This makes the output for a verbose queue run more intelligible.
6067 31. Added a use_postmaster feature to recipient callouts.
6069 32. Added the $body_zerocount variable, containing the number of binary zero
6070 bytes in the message body.
6072 33. The time of last modification of the "new" subdirectory is now used as the
6073 "mailbox time last read" when there is a quota error for a maildir
6076 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6078 35. Added +ignore_unknown as a special item in host lists.
6080 36. Code for decoding IPv6 addresses in host lists is now included, even if
6081 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6082 address was recognized as an IP address, but was then not correctly decoded
6083 into binary, causing unexpected and incorrect effects when compared with
6090 1. Very minor rewording of debugging text in manualroute to say "list of
6091 hosts" instead of "hostlist".
6093 2. If verify=header_syntax was set, and a header line with an unqualified
6094 address (no domain) and a large number of spaces between the end of the
6095 name and the colon was received, the reception process suffered a buffer
6096 overflow, and (when I tested it) crashed. This was caused by some obsolete
6097 code that should have been removed. The fix is to remove it!
6099 3. When running in the test harness, delay a bit after writing a bounce
6100 message to get a bit more predictability in the log output.
6102 4. Added a call to search_tidyup() just before forking a reception process. In
6103 theory, someone could use a lookup in the expansion of smtp_accept_max_
6104 per_host which, without the tidyup, could leave open a database connection.
6106 5. Added the variables $recipient_data and $sender_data which get set from a
6107 lookup success in an ACL "recipients" or "senders" condition, or a router
6108 "senders" option, similar to $domain_data and $local_part_data.
6110 6. Moved the writing of debug_print from before to after the "senders" test
6113 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6114 problems for message scanning, either using a data ACL, or using
6115 local_scan() because the Received: header was not generated till after they
6116 were called (in order to set the time as the time of reception completion).
6117 I have revised the way this works. The header is now generated after the
6118 body is received, but before the ACL or local_scan() are called. After they
6119 are run, the timestamp in the header is updated.
6125 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6126 before starting a queue runner without re-exec. This happened only when
6127 deliver_drop_privilege was set or when the Exim user was set to root. The
6128 effect of the bug was that timeouts during subsequent deliveries caused
6129 crashes instead of being properly handled. The handler is now left at its
6130 default (and expected) setting.
6132 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6133 message, again when deliver_drop_privilege is set or Exim is run as root.
6134 The bug described in (1) was not present in this case, but the tidying up
6135 of the other signals was missing. I have made the two cases consistent.
6137 3. The ignore_target_hosts setting on a manualroute router was being ignored
6138 for hosts that were looked up using the /MX notation.
6140 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6143 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6144 operated on the sender address. After changing the $sender_address to <>
6145 for the sender address verify, Exim was re-instated it as the original
6146 (before rewriting) address, but remembering that it had rewritten it, so it
6147 wasn't rewriting it again. This bug also had the effect of breaking the
6148 sender address verification caching when the sender address was rewritten.
6150 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6151 This has been changed so that if the ip literal address matches
6152 ignore_target_hosts, the router declines.
6154 7. Added expansion conditions match_domain, match_address, and match_local_
6155 part (NOT match_host).
6157 8. The placeholder for the Received: header didn't have a length field set.
6159 9. Added code to Exim itself and to exim_lock to test for a specific race
6160 condition that could lead to file corruption when using MBX delivery. The
6161 issue is with the lockfile that is created in /tmp. If this file is removed
6162 after a process has opened it but before that process has acquired a lock,
6163 there is the potential for a second process to recreate the file and also
6164 acquire a lock. This could lead to two Exim processes writing to the file
6165 at the same time. The added code performs the same test as UW imapd; it
6166 checks after acquiring the lock that its file descriptor still refers to
6167 the same named file.
6169 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6170 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6173 11. Added the smtp_active_hostname option. If used, this will typically be made
6174 to depend on the incoming interface address. Because $interface_address is
6175 not set up until the daemon has forked a reception process, error responses
6176 that can happen earlier (such as "too many connections") no longer contain
6179 12. If an expansion in a condition on a "warn" statement fails because a lookup
6180 defers, the "warn" statement is abandoned, and the next ACL statement is
6181 processed. Previously this caused the whole ACL to be aborted.
6183 13. Added the iplsearch lookup type.
6185 14. Added ident_timeout as a log selector.
6187 15. Added tls_certificate_verified as a log selector.
6189 16. Added a global option tls_require_ciphers (compare the smtp transport
6190 option of the same name). This controls incoming TLS connections.
6192 17. I finally figured out how to make tls_require_ciphers do a similar thing
6193 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6194 before starting the TLS session.
6196 18. Tabs are now shown as \t in -bP output.
6198 19. If the log selector return_path_on_delivery was set, Exim crashed when
6199 bouncing a message because it had too many Received: header lines.
6201 20. If two routers both had headers_remove settings, and the first one included
6202 a superfluous trailing colon, the final name in the first list and the
6203 first name in the second list were incorrectly joined into one item (with a
6204 colon in the middle).
6210 1. Added -C and -D options to the exinext utility, mainly to make it easier
6211 to include in the automated testing, but these could be helpful when
6212 multiple configurations are in use.
6214 2. The exinext utility was not formatting the output nicely when there was
6215 an alternate port involved in the retry record key, nor when there was a
6216 message id as well (for retries that were specific to a specific message
6217 and a specific host). It was also confused by IPv6 addresses, because of
6218 the additional colons they contain. I have fixed the IPv4 problem, and
6219 patched it up to do a reasonable job for IPv6.
6221 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6222 delivery, the log line now contains "pipelined" if PIPELINING was used.
6224 4. An SMTP transport process used to panic and die if the bind() call to set
6225 an explicit outgoing interface failed. This has been changed; it is now
6226 treated in the same way as a connect() failure.
6228 5. A reference to $sender_host_name in the part of a conditional expansion
6229 that was being skipped was still causing a DNS lookup. This no longer
6232 6. The def: expansion condition was not recognizing references to header lines
6233 that used bh_ and bheader_.
6235 7. Added the _cache feature to named lists.
6237 8. The code for checking quota_filecount in the appendfile transport was
6238 allowing one more file than it should have been.
6240 9. For compatibility with Sendmail, the command line option
6248 and sets the incoming protocol and host name (for trusted callers). The
6249 host name and its colon can be omitted when only the protocol is to be set.
6250 Note the Exim already has two private options, -pd and -ps, that refer to
6251 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6252 "s", but I don't think that's a major issue.
6254 10. A number of refactoring changes to the code, none of which should affect
6257 (a) The number of logging options was getting close to filling up the
6258 32-bit word that was used as a bit map. I have split them into two classes:
6259 those that are passed in the argument to log_write(), and those that are
6260 only ever tested independently outside of that function. These are now in
6261 separate 32-bit words, so there is plenty of room for expansion again.
6262 There is no change in the user interface or the logging behaviour.
6264 (b) When building, for example, log lines, the code previously used a
6265 macro that called string_cat() twice, in order to add two strings. This is
6266 not really sufficiently general. Furthermore, there was one instance where
6267 it was actually wrong because one of the argument was used twice, and in
6268 one call a function was used. (As it happened, calling the function twice
6269 did not affect the overall behaviour.) The macro has been replaced by a
6270 function that can join an arbitrary number of extra strings onto a growing
6273 (c) The code for expansion conditions now uses a table and a binary chop
6274 instead of a serial search (which was left over from when there were very
6275 few conditions). Also, it now recognizes conditions like "pam" even when
6276 the relevant support is not compiled in: a suitably worded error message is
6277 given if an attempt is made to use such a condition.
6279 11. Added ${time_interval:xxxxx}.
6281 12. A bug was causing one of the ddress fields not to be passed back correctly
6282 from remote delivery subprocesses. The field in question was not being
6283 subsequently used, so this caused to problems in practice.
6285 13. Added new log selectors queue_time and deliver_time.
6287 14. Might have fixed a bug in maildirsizefile handling that threw up
6288 "unexpected character" debug warnings, and recalculated the data
6289 unnecessarily. In any case, I expanded the warning message to give more
6292 15. Added the message "Restricted characters in address" to the statements in
6293 the default ACL that block characters like @ and % in local parts.
6295 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6296 Three changes have been made:
6298 (a) There was a serious bug; a negative response to MAIL caused the whole
6299 recipient domain to be cached as invalid, thereby blocking all messages
6300 to all local parts at the same domain, from all senders. This bug has
6301 been fixed. The domain is no longer cached after a negative response to
6302 MAIL if the sender used is not empty.
6304 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6307 (c) A new callout option, "use_sender" has been added for people who want
6308 the modified behaviour.
6314 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6317 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6318 indeed breaks things for older releases.
6320 3. Added additional logging to the case where there is a problem reading data
6321 from a filter that is running in a subprocess using a pipe, in order to
6322 try to track down a specific problem.
6324 4. Testing facility fudge: when running in the test harness and attempting
6325 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6326 getting "No route to host". Convert this to a timeout.
6328 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6331 6. Some OS don't have socklen_t but use size_t instead. This affects the
6332 fifth argument of getsockopt() amongst other things. This is now
6333 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6334 can be set for individual OS. I have set it for SunOS5, OSF1, and
6335 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6336 some earlier ones do not.
6338 7. Change 4.30/15 was not doing the test caselessly.
6340 8. The standard form for an IPv6 address literal was being rejected by address
6341 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6342 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6343 this, as well as the form without the "IPv6" on the front (but only when
6344 address literals are enabled, of course).
6346 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6348 10. Exim crashed if a message with an empty sender address specified by -f
6349 encountered a router with an errors_to setting. This could be provoked only
6350 by a command such as
6354 where an empty string was supplied; "<>" did not hit this bug.
6356 11. Installed PCRE release 4.5.
6358 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6359 remained set. It is now erased.
6361 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6362 times from message ids (which are base 36 rather than the normal 62).
6364 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6365 were being counted as actual protocol errors, and logged if the log
6366 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6367 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6368 and DATA following a set of rejected RCPTs do not count as protocol errors.
6369 In other words, Exim assumes they were pipelined, though this may not
6370 actually be the case. Of course, in all cases the client gets an
6371 appropriate error code.
6373 15. If a lookup fails in an ACL condition, a message about the failure may
6374 be available; it is used if testing the ACL cannot continue, because most
6375 such messages specify what the cause of the deferral is. However, some
6376 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6377 that caused an old message to be retained and used if a later statement
6378 caused a defer, replacing the real cause of the deferral.
6380 16. If an IP address had so many PTR records that the DNS lookup buffer
6381 was not large enough to hold them, Exim could crash while trying to process
6382 the truncated data. It now detects and logs this case.
6384 17. Further to 4.21/58, another change has been made: if (and only if) the
6385 first line of a message (the first header line) ends with CRLF, a bare LF
6386 in a subsequent header line has a space inserted after it, so as not to
6387 terminate the header.
6389 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6390 unnecessarily, used atoi() instead of strtol(), and didn't check the
6391 termination when getting file sizes from file names by regex.
6393 19. Completely re-implemented the support for maildirsize files, in the light
6394 of a number of problems with the previous contributed implementation
6395 (4.30/29). In particular:
6397 . If the quota is zero, the maildirsize file is maintained, but no quota is
6400 . If the maildir directory does not exist, it is created before any attempt
6401 to write a maildirsize file.
6403 . The quota value in the file is just a cache; if the quota is changed in
6404 the transport, the new value overrides.
6406 . A regular expression is available for excluding directories from the
6409 20. The autoreply transport checks the characters in options that define the
6410 message's headers; it allows continued headers, but it was checking with
6411 isspace() after an embedded newline instead of explicitly looking for a
6414 21. If all the "regular" hosts to which an address was routed had passed their
6415 expiry times, and had not reached their retry times, the address was
6416 bounced, even if fallback hosts were defined. Now Exim should go on to try
6419 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6420 equivalent code in the SMTP transport. Some hosts send humungous responses
6421 to HELO/EHLO, more than 1024 it seems.
6423 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6424 gives compiler warnings in some environments. I've now done it "properly",
6427 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6428 (because of problems with the built-in one) was declared to return uschar *
6429 instead of char *, causing compiler failure.
6431 25. Fixed a file descriptor leak when processing alias/forward files.
6433 26. Fixed a minor format string issue in dbfn.c.
6435 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6437 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6438 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6441 29. When a sender address is verified, it is cached, to save repeating the test
6442 when there is more than one recipient in a message. However, when the
6443 verification involves a callout, it is possible for different callout
6444 options to be set for different recipients. It is too complicated to keep
6445 track of this in the cache, so now Exim always runs a verification when a
6446 callout is required, relying on the callout cache for the optimization.
6447 The overhead is duplication of the address routing, but this should not be
6450 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6451 to be verified with callout=postmaster, and the main callout worked but the
6452 postmaster check failed, the verification correctly failed. However, if a
6453 subsequent RCPT command asked for sender verification *without* the
6454 postmaster check, incorrect caching caused this verification also to fail,
6457 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6458 it was not caching the DNS options (qualify_single, search_parents) that
6459 were used when the lookup failed. A subsequent lookup with different
6460 options therefore always gave the same answer, though there were cases
6461 where it should not have. (Example: a "domains = !$mx_any" option on a
6462 dnslookup router: the "domains" option is always processed without any
6463 widening, but the router might have qualify_single set.) Now Exim uses the
6464 cached value only when the same options are set.
6466 32. Added John Jetmore's "exipick" utility to the distribution.
6468 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6469 than a timeout (e.g. a certificate is required, and is not provided), an
6470 Exim server now closes the connection immediately. Previously it waited for
6471 the client to close - but if the client is SSL, it seems that they each
6472 wait for each other, leading to a delay before one of them times out.
6474 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6475 maintained 0.8.x compatibility because I don't think many are using it, and
6476 it is clearly obsolete.
6478 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6481 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6482 client certificate was expired. A simple patch fixes this, though I don't
6483 understand the full logic of why the verify callback is called multiple
6486 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6487 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6488 which causes problems with some clients (such as the Certicom SSL Plus
6489 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6490 disables the coutermeasure allowing Eudora to connect."
6492 38. Exim was not checking that a write() to a log file succeeded. This could
6493 lead to Bad Things if a log got too big, in particular if it hit a file
6494 size limit. Exim now panics and dies if it cannot write to a log file, just
6495 as it does if it cannot open a log file.
6497 39. Modified OS/Makefile-Linux so that it now contains
6499 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6501 The two -D definitions ensure that Exim is compiled with large file
6502 support, which makes it possible to handle log files that are bigger than
6505 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6506 instance) a domain was checked against a named list that involved a lookup,
6507 causing $domain_data to be set, then another domain was checked against the
6508 same list, then the first domain was re-checked, the value of $domain_data
6509 after the final check could be wrong. In particular, if the second check
6510 failed, it could be set empty. This bug probably also applied to
6513 41. The strip_trailing_dot option was not being applied to the address given
6514 with the -f command-line option.
6516 42. The code for reading a message's header from the spool was incrementing
6517 $received_count, but never initializing it. This meant that the value was
6518 incorrect (doubled) while delivering a message in the same process in which
6519 it was received. In the most common configuration of Exim, this never
6520 happens - a fresh exec is done - but it can happen when
6521 deliver_drop_privilege is set.
6523 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6524 it now includes up to 150 characters of the unexpected data in the log
6527 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6528 and building data strings. The size of both of these buffers was 10 000
6529 bytes - far larger than anybody would *ever* want, thought I. Needless to
6530 say, somebody hit the limit. I have increased the maximum line length to
6531 20 000 and the maximum data length of concatenated lines to 100 000. I have
6532 also fixed two bugs, because there was no checking on these buffers. Tsk,
6533 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6534 buffer is too small.
6536 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6537 lsearch lookups. Now it does.
6539 46. When parsing a route_list item in a manualroute router, a fixed-length
6540 buffer was used for the list of hosts. I made this 1024 bytes long,
6541 thinking that nobody would ever have a list of hosts that long. Wrong.
6542 Somebody had a whole pile of complicated expansion conditions, and the
6543 string was silently truncated, leading to an expansion error. It turns out
6544 that it is easier to change to an unlimited length (owing to other changes
6545 that have happened since this code was originally written) than to build
6546 structure for giving a limitation error. The length of the item that
6547 expands into the list of hosts is now unlimited.
6549 47. The lsearch lookup could not handle data where the length of text line was
6550 more than 4095 characters. Such lines were truncated, leading to shortened
6551 data being returned. It should now handle lines of any length.
6553 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6554 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6557 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6558 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6559 no longer happens in comment lines. A list of replacements is now placed
6560 at the head of all of the source files, except those whose only change is
6561 to replace PERL_COMMAND in the very first #! line.
6563 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6564 messages on the queue, with a bottom-up merge sort, using code contributed
6565 by Michael Haardt. This should make operations like -bp somewhat faster on
6566 large queues. It won't affect queue runners, except when queue_run_in_order
6569 51. Installed eximstats 1.31 in the distribution.
6571 52. Added support for SRV lookups to the dnslookup router.
6573 53. If an ACL referred to $message_body or $message_body_end, the value was not
6574 reset for any messages that followed in the same SMTP session.
6576 54. The store-handling optimization for building very long strings was not
6577 differentiating between the different store pools. I don't think this
6578 actually made any difference in practice, but I've tidied it.
6580 55. While running the routers to verify a sender address, $sender_address
6581 was still set to the sender address. This is wrong, because when routing to
6582 send a bounce to the sender, it would be empty. Therefore, I have changed
6583 it so that, while verifying a sender address, $sender_address is set to <>.
6584 (There is no change to what happens when verifying a recipient address.)
6586 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6587 target A or AAAA records (if not already returned) without resetting the
6588 qualify_single or search_parents options of the DNS resolver. These are
6589 inappropriate in this case because the targets of MX and SRV records must
6590 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6591 target that, when qualified, matched something in the local domain. These
6592 two options are now turned off when doing these lookups.
6594 57. It seems that at least some releases of Reiserfs (which does not have the
6595 concept of a fixed number of inodes) returns zero and not -1 for the
6596 number of available inodes. This interacted badly with check_spool_inodes,
6597 which assumed that -1 was the "no such thing" setting. What I have done is
6598 to check that the total number of inodes is greater than zero before doing
6599 the test of how many are available.
6601 58. When a "warn" ACL statement has a log_message modifier, the message is
6602 remembered, and not repeated. This is to avoid a lot of repetition when a
6603 message has many recipients that cause the same warning to be written.
6604 However, Exim was preserving the list of already written lines for an
6605 entire SMTP session, which doesn't seem right. The memory is now reset if a
6606 new message is started.
6608 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6609 debugging output unless log_rewrite was also set.
6611 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6612 of (int)(handle) when we know that handle contains (void *)(-1).
6614 61. The Exim daemon panic-logs an error return when it closes the incoming
6615 connection. However "connection reset by peer" seems to be common, and
6616 isn't really an error worthy of noting specially, so that particular error
6619 62. When Exim is trying to find all the local interfaces, it used to panic and
6620 die if the ioctl to get the interface flags failed. However, it seems that
6621 on at least one OS (Solaris 9) it is possible to have an interface that is
6622 included in the list of interfaces, but for which you get a failure error
6623 for this call. This happens when the interface is not "plumbed" into a
6624 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6625 failure of the "get flags" call assumes that the interface is down.
6627 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6628 makes life easier for people who are doing arithmetic on fields extracted
6629 from dates, where you often get leading zeros that should not be
6630 interpreted as octal.
6632 64. Added qualify_domain to the redirect router, to override the global
6635 65. If a pathologically long header line contained very many addresses (the
6636 report of this problem mentioned 10 000) and each of them was rewritten,
6637 Exim could use up a very large amount of memory. (It kept on making new
6638 copies of the header line as it rewrote, and never released the old ones.)
6639 At the expense of a bit more processing, the header rewriting function has
6640 been changed so that it no longer eats memory in this way.
6642 66. The generation of the Received: header has been moved from the time that a
6643 message starts to be received, to the time that it finishes. The timestamp
6644 in the Received: header should now be very close to that of the <= log
6645 line. There are two side-effects of this change:
6647 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6648 logged header lines no longer include the local Received: line, because
6649 it has not yet been created. The same applies to a copy of the message
6650 that is returned to a non-SMTP sender when a message is rejected.
6652 (b) When a filter file is tested using -bf, no additional Received: header
6653 is added to the test message. After some thought, I decided that this
6656 This change does not affect the value of $received_for. It is still set
6657 after address rewriting, but before local_scan() is called.
6659 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6661 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6662 gave an unhelpful panic error message, and a defer error. I have managed to
6663 change this behaviour so that it now rejects any supplied certificate,
6664 which seems right, as the list of acceptable certificates is empty.
6666 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6667 gave an unhelpful defer error. I have not managed to make this reject any
6668 supplied certificates, but the error message it gives is "no certificate
6669 supplied", which is not helpful.
6671 70. exigrep's output now also includes lines that are not associated with any
6672 message, but which match the given pattern. Implemented by a patch from
6673 Martin Sluka, which also tidied up the Perl a bit.
6675 71. Recipient callout verification, like sender verification, was using <> in
6676 the MAIL FROM command. This isn't really the right thing, since the actual
6677 sender may affect whether the remote host accepts the recipient or not. I
6678 have changed it to use the actual sender in the callout; this means that
6679 the cache record is now keyed on a recipient/sender pair, not just the
6680 recipient address. There doesn't seem to be a real danger of callout loops,
6681 since a callout by the remote host to check the sender would use <>.
6682 [SEE ABOVE: changed after hitting problems.]
6684 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6685 temporary errors. However, in the case of such a code being given after
6686 the end of a data transmission (i.e. after ".") Exim was failing to write
6687 a retry record for the message. (Yes, there was some broken host that was
6688 actually sending 8xx at this point.)
6690 73. An unknown lookup type in a host list could cause Exim to panic-die when
6691 the list was checked. (An example that provoked this was putting <; in the
6692 middle of a list instead of at the start.) If this happened during a DATA
6693 ACL check, a -D file could be left lying around. This kind of configuration
6694 error no longer causes Exim to die; instead it causes a defer error. The
6695 incident is still logged to the main and panic logs.
6697 74. Buglet left over from Exim 3 conversion. The message "too many messages
6698 in one connection" was written to the rejectlog but not the mainlog, except
6699 when address rewriting (yes!) was being logged.
6701 75. Added write_rejectlog option.
6703 76. When a system filter was run not as root (that is, when system_filter_user
6704 was set), the values of the $n variables were not being returned to the
6705 main process; thus, they were not subsequently available in the $sn
6708 77. Added +return_path_on_delivery log selector.
6710 78. A connection timeout was being treated differently from recipients deferred
6711 when testing hosts_max_try with a message that was older than the host's
6712 retry timeout. (The host should not be counted, thus allowing all hosts to
6713 be tried at least once before bouncing.) This may have been the cause of an
6714 occasionally reported bug whereby a message would remain on the queue
6715 longer than the retry timeout, but would be bounced if a delivery was
6716 forced. I say "may" because I never totally pinned down the problem;
6717 setting up timeout/retry tests is difficult. See also the next item.
6719 79. The ultimate address timeout was not being applied to errors that involved
6720 a combination of host plus message (for example, a timeout on a MAIL
6721 command). When an address resolved to a number of possible hosts, and they
6722 were not all tried for each delivery (e.g. because of hosts_max_try), a
6723 message could remain on the queue longer than the retry timeout.
6725 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6728 81. Fixed an obscure SMTP outgoing bug which required at least the following
6729 conditions: (a) there was another message waiting for the same server;
6730 (b) the server returned 5xx to all RCPT commands in the first message so
6731 that the message was not completed; (c) the server dropped the connection
6732 or gave a negative response to the RSET that Exim sends to abort the
6733 transaction. The observed case was a dropped connection after DATA that had
6734 been sent in pipelining mode. That is, the server had advertised PIPELINING
6735 but was not implementing it correctly. The effect of the bug was incorrect
6736 behaviour, such as trying another host, and this could lead to a crash.
6742 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6743 and daemon.c were passed as pointers to ints; they should have been
6744 pointers to socklen_t variables (which are typically unsigned ints).
6746 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6749 3. Fixed a really odd bug that affected only the testing scheme; patching a
6750 certain fixed string in the binary changed the value of another string that
6751 happened to be identical to the end of the original first string.
6753 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6754 name", it returns that address as the IP address. On some operating
6755 systems (e.g. Solaris), it also passes back the IP address string as the
6756 "host name". However, on others (e.g. Linux), it passes back an empty
6757 string. Exim wasn't checking for this, and was changing the host name to an
6758 empty string, assuming it had been canonicalized.
6760 5. Although rare, it is permitted to have more than one PTR record for a given
6761 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6762 all the names associated with an address, because they do in Solaris.
6763 However, it seems that they do not in Linux for data that comes from the
6764 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6765 I found this out when I moved to a new Linux workstation and tried to run
6766 the Exim test suite.
6768 To get round this problem I have changed the code so that it now does its
6769 own call to the DNS to look up PTR records when searching for a host name.
6770 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6771 addresses that are only in /etc/hosts are still found.
6773 This behaviour is, however, controlled by an option called host_lookup_
6774 order, which defaults to "bydns:byaddr". If people want to use the other
6775 order, or indeed, just use one or the other means of lookup, they can
6776 specify it in this variable.
6778 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6779 some operating systems, this comes back from gethostbyaddr() as an empty
6780 string, and this is what Exim used to test for. However, it seems that in
6781 other systems, "." is yielded. Exim now tests for this case too.
6783 7. The values of check_spool_space and check_log_space are now held internally
6784 as a number of kilobytes instead of an absolute number of bytes. If a
6785 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6786 kilobyte. This means that much larger values can be stored.
6788 8. Exim monitor: an attempt to get the action menu when not actually pointing
6789 at a message produces an empty menu entitled "No message selected". This
6790 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6791 no entries in it ("Shell widget menu has zero width and/or height"). So I
6792 have added a single, blank menu entry in this case.
6794 9. Added ${quote_local_part.
6796 10. MIME decoding is now applied to the contents of Subject: header lines when
6799 11. Now that a reference to $sender_host_address automatically causes a reverse
6800 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6801 host lookup before query-style lookups in lists that might use this
6802 variable. This has therefore been abolished, and the "net-" prefix is no
6803 longer necessary for query-style lookups.
6805 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6806 have been a typo for LFLAGS, so it has been changed.
6808 13. The install script calls Exim with "-C /dev/null" in order to find the
6809 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6810 to be output. However, since Exim outputs its version number before the
6811 error, it didn't break the script. It just looked ugly. I fixed this by
6812 always allowing "-C /dev/null" if the caller is root.
6814 14. Ignore overlarge ACL variable number when reading spool file - insurance
6815 against a later release with more variables having written the file.
6817 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6818 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6819 this, as well as the form without the "IPv6" on the front.
6821 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6822 OS/Makefile-Darwin file.
6824 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6825 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6827 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6828 variable. However, some OS use ints for inodes. I've added cast to long int
6829 to get rid of the compiler warning.
6831 19. I had forgotten to lock out "/../" in configuration file names when
6832 ALT_CONFIG_PREFIX was set.
6834 20. Routers used for verification do not need to specify transports. However,
6835 if such a router generated a host list, and callout was configured, Exim
6836 crashed, because it could not find a port number from the (non-existent)
6837 transport. It now assumes port 25 in this circumstance.
6839 21. Added the -t option to exigrep.
6841 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6842 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6843 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6844 them is set, LOOKUP_LSEARCH is forced.
6846 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6848 24. Added sender and host information to the "rejected by local_scan()" log
6849 line; previously there was no indication of these.
6851 25. Added .include_if_exists.
6853 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6854 Linux. It turns out that not all file systems support this. Apparently some
6855 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6856 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6857 not supported on the file descriptor, is now ignored when Exim is trying to
6858 sync a directory. This applies only to Linux.
6860 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6862 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6863 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6866 29. Added support for maildirsize files from supplied patch (modified a bit).
6868 30. The use of :fail: followed by an empty string could lead Exim to respond to
6869 sender verification failures with (e.g.):
6871 550 Verification failed for <xxx>
6872 550 Sender verify failed
6874 where the first response line was missing the '-' that indicates it is not
6875 the final line of the response.
6877 31. The loop for finding the name of the user that called Exim had a hardwired
6878 limit of 10; it now uses the value of finduser_retries, which is used for
6879 all other user lookups.
6881 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6884 33. Exim was neglecting to zero errno before one call of strtol() when
6885 expanding a string and expecting an integer value. On some systems this
6886 resulted in spurious "integer overflow" errors. Also, it was casting the
6887 result into an int without checking.
6889 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6890 did not work. The code looks as if it has *never* worked, though it appears
6891 to have been documented since at least release 1.62. I have made it work.
6893 35. The "timeout_DNS" error in retry rules, also documented since at least
6894 1.62, also never worked. As it isn't clear exactly what this means, and
6895 clearly it isn't a major issue, I have abolished the feature by treating it
6896 as "timeout", and writing a warning to the main and panic logs.
6898 36. The display of retry rules for -brt wasn't always showing the error code
6901 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6902 timeout_connect_A, timeout_connect_MX.
6904 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6905 to the empty sender.
6907 39. The daemon was not analysing the content of -oX till after it had closed
6908 stderr and disconnected from the controlling terminal. This meant that any
6909 syntax errors were only noted on the panic log, and the return code from
6910 the command was 0. By re-arranging the code a little, I've made the
6911 decoding happen first, so such errors now appear on stderr, and the return
6912 code is 1. However, the actual setting up of the sockets still happens in
6913 the disconnected process, so errors there are still only recorded on the
6916 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6917 connections (as happens on some IP stacks) was logged at start up time as
6918 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6919 it from "IPv6 and IPv4", which means that two separate sockets are being
6922 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6923 says whether AF_INET or AF_INET6 was passed as an argument.
6925 42. Exiwhat output was messed up when time zones were included in log
6928 43. Exiwhat now gives more information about the daemon's listening ports,
6929 and whether -tls-on-connect was used.
6931 44. The "port" option of the smtp transport is now expanded.
6933 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6934 silently ignored. Now an error message is written to the main and panic
6937 46. There's a new ACL modifier called "logwrite" which writes to a log file
6938 as soon as it is encountered.
6940 47. Added $local_user_uid and $local_user_gid at routing time.
6942 48. Exim crashed when trying to verify a sender address that was being
6945 49. Exim was recognizing only a space character after ".include". It now also
6946 recognizes a tab character.
6948 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6949 extracting the relevant information from the specification. The man page no
6950 longer contains scrambled data for the -d option, and I've added a section
6951 at the front about calling Exim under different names.
6953 51. Added "extra_headers" argument to the "mail" command in filter files.
6955 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6958 53. Installed eximstats 1.29.
6960 54. Added transport_filter_timeout as a generic transport option.
6962 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6963 Cc: header lines. This was required by RFC 822, but it not required by RFC
6966 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6967 incoming messages that did not have them. Now it does so only if the
6968 message originates locally, that is, if there is no associated remote host
6969 address. When Resent- header lines are present, this applies to the Resent-
6970 lines rather than the non-Resent- lines.
6972 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6973 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6975 58. Messages for configuration errors now include the name of the main
6976 configuration file - useful now that there may be more than one file in a
6977 list (.included file names were always shown).
6979 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6980 for those rare installations that do not start the daemon as root or run it
6981 setuid root. I've cut out the call to initgroups() if the daemon is not
6984 60. The Exim user and group can now be bound into the binary as text strings
6985 that are looked up at the start of Exim's processing.
6987 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6989 62. Added $mailstore_basename variable.
6991 63. Installed patch to sieve.c from Michael Haardt.
6993 64. When Exim failed to open the panic log after failing to open the main log,
6994 the original message it was trying to log was written to stderr and debug
6995 output, but if they were not available (the usual case in production), it
6996 was lost. Now it is written to syslog before the two lines that record the
6997 failures to open the logs.
6999 65. Users' Exim filters run in subprocesses under the user's uid. It is
7000 possible for a "deliver" command or an alias in a "personal" command to
7001 provoke an address rewrite. If logging of address rewriting is configured,
7002 this fails because the process is not running as root or exim. There may be
7003 a better way of dealing with this, but for the moment (because 4.30 needs
7004 to be released), I have disabled address rewrite logging when running a
7005 filter in a non-root, non-exim process.
7011 1. The buildconfig auxiliary program wasn't quoting the value set for
7012 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7013 not defined. This bug was masked in 4.22 by the effect that was fixed in
7016 2. Some messages that were rejected after a message id was allocated were
7017 shown as "incomplete" by exigrep. It no longer does this for messages that
7018 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7020 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7021 have allow_domain_literals set, the ID did not get logged in the <= line.
7022 Domain literals are now always recognized in Message-ID: header lines.
7024 4. The first argument for a ${extract expansion item is the key name or field
7025 number. Leading and trailing spaces in this item were not being ignored,
7026 causing some misleading effects.
7028 5. When deliver_drop_privilege was set, single queue runner processes started
7029 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7030 same command in the process it spins off) were not dropping privilege.
7032 6. When the daemon running as "exim" started a queue runner, it always
7033 re-executed Exim in the spun-off process. This is a waste of effort when
7034 deliver_drop_privilege is set. The new process now just calls the
7035 queue-runner function directly.
7041 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7044 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7045 ignored. Though the use of -oP was forcing the writing of a pid file, it
7046 was always written to the default place.
7048 3. If the message "no IP address found for host xxxx" is generated during
7049 incoming verification, it is now followed by identification of the incoming
7050 connection (so you can more easily find what provoked it).
7052 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7054 5. Added some features to "harden" Exim a bit more against certain attacks:
7056 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7057 be put in Local/Makefile. This is like the never_users runtime option,
7058 but it cannot be overridden. The default setting is "root".
7060 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7061 prefix string with which any file named in a -C command line option
7064 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7065 is retained for -C and -D only if the caller of Exim is root. Without
7066 it, the exim user may also use -C and -D and retain privilege.
7068 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7069 command line option is disabled.
7071 6. Macro names set by the -D option must start with an upper case letter, just
7072 like macro names defined in the configuration file.
7074 7. Added "dereference=" facility to LDAP.
7076 8. Two instances of the typo "uknown" in the source files are fixed.
7078 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7079 the Configure-Makefile script screwed up while processing it.
7081 10. Incorporated PCRE 4.4.
7083 11. The SMTP synchronization check was not operating right at the start of an
7084 SMTP session. For example, it could not catch a HELO sent before the client
7085 waited for the greeting. There is now a check for outstanding input at the
7086 point when the greeting is written. Because of the duplex, asynchronous
7087 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7088 way, but not yet received, when the check is performed.
7090 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7091 on TCP/IP sockets, because this apparently causes some broken clients to
7094 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7095 unchanged) from the Cygwin maintainer.
7097 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7098 was supported instead of testing for mbx. Effectively a typo.
7100 15. The spa authenticator server code was not checking that the input it
7101 received was valid base64.
7103 16. The debug output line for the "set" modifier in ACLs was not showing the
7104 name of the variable that was being set.
7106 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7108 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7109 lookup on its own. Something else was needed to trigger the lookup. For
7110 example, a match in host_lookup or the need for a host name in a host list.
7111 Now, if $sender_host_name is referenced and the host name has not yet been
7112 looked up, a lookup is performed. If the lookup fails, the variable remains
7113 empty, and $host_lookup_failed is set to "1".
7115 19. Added "eqi" as a case-independent comparison operator.
7117 20. The saslauthd authentication condition could segfault if neither service
7118 nor realm was specified.
7120 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7121 error message that was logged was misleading, and incoming SMTP
7122 connections were dropped. The message is now more accurate, and temporary
7123 errors are given to SMTP connections.
7125 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7126 (except RSET) with a 421 error, until QUIT is received. However, it was
7127 failing to send a response to QUIT.
7129 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7130 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7131 ACL is now run after the helo_try_verify_hosts code.
7133 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7134 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7135 case-independent, so other case variants are also recognized). Apparently
7136 some systems use these upper case variants.
7138 25. If more than two messages were waiting for the same host, and a transport
7139 filter was specified for the transport, Exim sent two messages over the
7140 same TCP/IP connection, and then failed with "socket operation on non-
7141 socket" when it tried to send the third.
7143 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7145 27. The extern definition of crypt16() in expand.c was not being excluded when
7146 the OS had its own crypt16() function.
7148 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7149 as a preferred synonym for return_size_limit, both as an option and as an
7152 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7154 30. Changed the default configuration ACL to relax the local part checking rule
7155 for addresses that are not in any local domains. For these addresses,
7156 slashes and pipe symbols are allowed within local parts, but the sequence
7157 /../ is explicitly forbidden.
7159 31. SPA server authentication was not clearing the challenge buffer before
7162 32. log_message in a "warn" ACL statement was writing to the reject log as
7163 well as to the main log, which contradicts the documentation and doesn't
7164 seem right (because no rejection is happening). So I have stopped it.
7166 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7167 However, I am unable to do any testing of this.
7169 34. Fixed an infelicity in the appendfile transport. When checking directories
7170 for a mailbox, to see if any needed to be created, it was accidentally
7171 using path names with one or more superfluous leading slashes; tracing
7172 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7174 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7175 contents are added to the log line that is written for every discarded
7176 recipient. (Previously a log_message setting was ignored.)
7178 36. The ${quote: operator now quotes the string if it is empty.
7180 37. The install script runs exim in order to find its version number. If for
7181 some reason other than non-existence or emptiness, which it checks, it
7182 could not run './exim', it was installing it with an empty version number,
7183 i.e. as "exim-". This error state is now caught, and the installation is
7186 38. An argument was missing from the function that creates an error message
7187 when Exim fails to connect to the socket for saslauthd authentication.
7188 This could cause Exim to crash, or give a corrupted message.
7190 39. Added isip, isip4, and isip6 to ${if conditions.
7192 40. The ACL variables $acl_xx are now saved with the message, and can be
7193 accessed later in routers, transports, and filters.
7195 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7196 strings in the file are not string-expanded.
7198 42. If a MAIL command specified a SIZE value that was too large to fit into an
7199 int variable, the check against message_size_limit failed. Such values are
7200 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7201 day this will have to be increased, but I don't think I want to be around
7202 when emails are that large.
7209 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7210 iconv() is not standard in FreeBSD.
7212 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7213 IPv6 enabled. The observed symptom was a segmentation fault on return from
7214 the function os_common_find_running_interfaces() in src/os.c.
7216 3. In the check_special_case() function in daemon.c I had used "errno" as an
7217 argument name, which causes warnings on some systems. This was basically a
7218 typo, since it was named "eno" in the comments!
7220 4. The code that waits for the clock to tick (at a resolution of some fraction
7221 of a second) so as to ensure message-id uniqueness was always waiting for
7222 at least one whole tick, when it could have waited for less. [This is
7223 almost certainly not relevant at current processor speeds, where it is
7224 unlikely to ever wait at all. But we try to future-proof.]
7226 5. The function that sleeps for a time interval that includes fractions of a
7227 second contained a race. It did not block SIGALRM between setting the
7228 timer, and suspending (a couple of lines later). If the interval was short
7229 and the sigsuspend() was delayed until after it had expired, the suspension
7230 never ended. On busy systems this could lead to processes getting stuck for
7233 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7234 process, before it forks any delivery processes. The open lookup caching
7235 mechanism meant that the open file or database connection was passed into
7236 the delivery process. The problem was that delivery processes always tidy
7237 up cached lookup data. This could cause a problem for the next delivery
7238 process started by the queue runner, because the external queue runner
7239 process does not know about the closure. So the next delivery process
7240 still has data in the lookup cache. In the case of a file lookup, there was
7241 no problem because closing a file descriptor in a subprocess doesn't affect
7242 the parent. However, if the lookup was caching a connection to a database,
7243 the connection was closed, and the second delivery process was likely to
7244 see errors such as "PGSQL: query failed: server closed the connection
7245 unexpectedly". The problem has been fixed by closing all cached lookups
7246 in a queue runner before running a delivery process.
7248 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7249 seem to have the "const" qualifier which it has on other OS. I've
7252 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7253 *of the same type* (client or server) with the same public name that an
7254 error should be diagnosed.
7256 9. When Exim looked up a host name for an IP address, but failed to find the
7257 original IP address when looking up the host name (a safety check), it
7258 output the message "<ip address> does not match any IP for NULL", which was
7259 confusing, to say the least. The bug was that the host name should have
7260 appeared instead of "NULL".
7262 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7263 user that is built into the binary, and the -C or -D options is used, root
7264 privilege is dropped before the configuration file is read. In addition,
7265 logging is switched to stderr instead of the normal log files. If the
7266 configuration then re-defines the Exim user, the unprivileged environment
7267 is probably not what is expected, so Exim logs a panic warning message (but
7270 However, if deliver_drop_privilege is set, the unprivileged state may well
7271 be exactly what is intended, so the warning has been cut out in that case,
7272 and Exim is allowed to try to write to its normal log files.
7278 1. smtp_return_error_details was not giving details for temporary sender
7279 or receiver verification errors.
7281 2. Diagnose a configuration error if two authenticators have the same public
7284 3. Exim used not to create the message log file for a message until the first
7285 delivery attempt. This could be confusing when incoming messages were held
7286 for policy or load reasons. The message log file is now created at the time
7287 the message is received, and an initial "Received" line is written to it.
7289 4. The automatically generated man page for command line options had a minor
7290 bug that caused no ill effects; however, a more serious problem was that
7291 the procedure for building the man page automatically didn't always
7292 operate. Consequently, release 4.20 contains an out-of-date version. This
7293 shouldn't happen again.
7295 5. When building Exim with embedded Perl support, the script that builds the
7296 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7297 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7299 6. The freeze_tell option was not being used for messages that were frozen on
7300 arrival, either by an ACL or by local_scan().
7302 7. Added the smtp_incomplete_transaction log selector.
7304 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7305 was accepting AUTH without a new EHLO.
7307 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7308 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7311 10. Logging of TCP/IP connections (when configured) now happens in the main
7312 daemon process instead of the child process, so that the TCP/IP connection
7313 count is more accurate (but it can never be perfect).
7315 11. The use of "drop" in a nested ACL was not being handled correctly in the
7316 outer ACL. Now, if condition failure induced by the nested "drop" causes
7317 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7318 or "require"), the connection is dropped.
7320 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7321 that yield "discard" can now be used with an "accept" or a "discard" verb,
7322 but an error is generated for any others (because I can't see a useful way
7323 to define what should happen).
7325 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7326 are now processed in the same way as lines in the Exim configuration file.
7327 In particular, continuation lines are supported.
7329 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7331 15. Added -ti meaning -t -i.
7333 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7334 domains, and warn by logging if others are found.
7336 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7337 returned from GIFCONF when Exim is trying to find the list of interfaces on
7338 a host. The code in os.c has been modified to copy each ifreq to an aligned
7339 structure in all cases.
7341 Also, in some cases, the returned ifreq's were being copied to a 'struct
7342 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7343 means the last couple of bytes of an IPv6 address could be chopped if the
7344 ifreq contained only a normal sockaddr (14 bytes storage).
7346 18. Named domain lists were not supported in the hosts_treat_as_local option.
7347 An entry such as +xxxx was not recognized, and was treated as a literal
7350 19. Ensure that header lines added by a DATA ACL are included in the reject log
7351 if the ACL subsequently rejects the message.
7353 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7354 MD5 (which is deprecated).
7356 21. When testing a filter file using -bf, Exim was writing a message when it
7357 took the sender from a "From " line in the message, but it was not doing so
7358 when it took $return_path from a Return-Path: header line. It now does.
7360 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7361 with a valid header line field name (a series of printing characters
7362 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7364 23. Changed "disc" in the source to "disk" to conform to the documentation and
7365 the book and for uniformity.
7367 24. Ignore Sendmail's -Ooption=value command line item.
7369 25. When execve() failed while trying to run a command in a pipe transport,
7370 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7371 could be confused with a return value of 69 from the command itself. This
7372 has been changed to 127, the value the shell returns if it is asked to run
7373 a non-existent command. The wording for the related log line suggests a
7374 non-existent command as the problem.
7376 26. If received_header_text expands to an empty string, do not add a Received:
7377 header line to the message. (Well, it adds a token one on the spool, but
7378 marks it "old" so that it doesn't get used or transmitted.)
7380 27. Installed eximstats 1.28 (addition of -nt option).
7382 28. There was no check for failure on the call to getsockname() in the daemon
7383 code. This can fail if there is a shortage of resources on the system, with
7384 ENOMEM, for example. A temporary error is now given on failure.
7386 29. Contrary to the C standard, it seems that in some environments, the
7387 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7388 program. Exim now does this explicitly; it affects the formatting of
7389 timestamps using strftime().
7391 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7392 complaints. I've now initialized all the variables, to avoid this.
7394 32. Header lines added by a system filter were not being "seen" during
7395 transport-time rewrites.
7397 33. The info_callback() function passed to OpenSSL is set up with type void
7398 (*)(SSL *, int, int), as described somewhere. However, when calling the
7399 function (actually a macro) that sets it up, the type void(*)() is
7400 expected. I've put in a cast to prevent warnings from picky compilers.
7402 34. If a DNS black list lookup found a CNAME record, but there were no A
7403 records associated with the domain it pointed at, Exim crashed.
7405 35. If a DNS black list lookup returned more than one A record, Exim ignored
7406 all but the first. It now scans all returned addresses if a particular IP
7407 value is being sought. In this situation, the contents of the
7408 $dnslist_value variable are a list of all the addresses, separated by a
7411 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7412 to accept a host name and all its aliases if the forward lookup for any of
7413 them yielded the IP address of the incoming connection. Now it accepts only
7414 those names whose forward lookup yields the correct IP address. Any other
7415 names are discarded. This closes a loophole whereby a rogue DNS
7416 administrator could create reverse DNS records to break through a
7417 wildcarded host restriction in an ACL.
7419 37. If a user filter or a system filter that ran in a subprocess used any of
7420 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7421 the wrong values were passed to the pipe command ($thisaddress had the
7422 value of $0, $0 had the value of $1, etc). This bug was introduced by
7423 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7425 38. Improved the line breaking for long SMTP error messages from ACLs.
7426 Previously, if there was no break point between 40 and 75 characters, Exim
7427 left the rest of the message alone. Two changes have been made: (a) I've
7428 reduced the minimum length to 35 characters; (b) if it can't find a break
7429 point between 35 and 75 characters, it looks ahead and uses the first one
7430 that it finds. This may give the occasional overlong line, but at least the
7431 remaining text gets split now.
7433 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7434 file descriptors might be low, and that setting 1000 would always raise it.
7435 It turns out that in some environments, the limit is already over 1000 and
7436 that lowering it causes trouble. So now Exim takes care not to decrease it.
7438 40. When delivering a message, the value of $return_path is set to $sender_
7439 address at the start of routing (routers may change the value). By an
7440 oversight, this default was not being set up when an address was tested by
7441 -bt or -bv, which affected the outcome if any router or filter referred to
7444 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7445 log only when "message" or "log_message" are set. However, if one of the
7446 conditions was an address verification, or a call to a nested ACL, the
7447 messages generated by the underlying test were being passed through. This
7448 no longer happens. The underlying message is available in $acl_verify_
7449 message for both "message" and "log_message" expansions, so it can be
7450 passed through if needed.
7452 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7453 new expansion $bh_ to give the encoded byte string without charset
7454 translation. Translation happens only if iconv() is available; HAVE_ICONV
7455 indicates this at build time. HEADERS_CHARSET gives the charset to
7456 translate to; headers_charset can change it in the configuration, and
7457 "headers charset" can change it in an individual filter file.
7459 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7460 that creates RFC 2047 encoded "words" labels them as that charset instead
7461 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7462 expansion operator; (ii) when Exim creates a From: line for a local
7463 message; (iii) when a header line is rewritten to include a "phrase" part.
7465 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7466 buggy, causing it to skip the first lines of messages whose message ID
7467 ended in 'D'. This would not have bitten before Exim release 4.14, because
7468 message IDs were unlikely to end in 'D' before then. The effect was to have
7469 incorrect size information for certain domains.
7471 45. #include "config.h" was missing at the start of the crypt16.c module. This
7472 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7475 46. If there was a timeout during a "random" callout check, Exim treated it as
7476 a failure of the random address, and carried on sending RSET and the real
7477 address. If the delay was just some slowness somewhere, the response to the
7478 original RCPT would be taken as a response to RSET and so on, causing
7479 mayhem of various kinds.
7481 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7482 when I implemented it. It didn't allow for the fact that some option values
7483 may legitimately be negative (e.g. size_addition), and it didn't even do
7484 the right test for positive values.
7486 48. Domain names in DNS records are case-independent. Exim always looks them up
7487 in lower case. Some resolvers return domain names in exactly the case they
7488 appear in the zone file, that is, they may contain uppercase letters. Not
7489 all resolvers do this - some return always lower case. Exim was treating a
7490 change of case by a resolver as a change of domain, similar to a widening
7491 of a domain abbreviation. This triggered its re-routing code and so it was
7492 trying to route what was effectively the same domain again. This normally
7493 caused routing to fail (because the router wouldn't handle the domain
7494 twice). Now Exim checks for this case specially, and just changes the
7495 casing of the domain that it ultimately uses when it transmits the message
7498 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7501 50. If a filter generated a file delivery with a non-absolute name (possible if
7502 no home directory exists for the router), the forbid_file option was not
7505 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7506 the existing equality matching.
7508 52. Exim was using ints instead of ino_t variables in some places where it was
7509 dealing with inode numbers.
7511 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7512 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7513 called TMPDIR, and if it finds it is different, it changes its value.
7515 54. The smtp_printf() function is now made available to local_scan() so
7516 additional output lines can be written before returning. There is also an
7517 smtp_fflush() function to enable the detection of a dropped connection.
7518 The variables smtp_input and smtp_batched_input are exported to
7521 55. Changed the default runtime configuration: the message "Unknown user"
7522 has been removed from the ACL, and instead placed on the localuser router,
7523 using the cannot_route_message feature. This means that any verification
7524 failures that generate their own messages won't get overridden. Similarly,
7525 the "Unrouteable address" message that was in the ACL for unverifiable
7526 relay addresses has also been removed.
7528 56. Added hosts_avoid_esmtp to the smtp transport.
7530 57. The exicyclog script was not checking for the esoteric option
7531 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7532 will work only if exicyclog is run under the appropriate euid.
7534 58. Following a discussion on the list, the rules by which Exim recognises line
7535 endings on incoming messages have been changed. The -dropcr and drop_cr
7536 options are now no-ops, retained only for backwards compatibility. The
7537 following line terminators are recognized: LF CRLF CR. However, special
7538 processing applies to CR:
7540 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7541 nor a local message in the state where . is a terminator.
7543 (ii) If a bare CR is encountered in a header line, an extra space is added
7544 after the line terminator so as not to end the header. The reasoning
7545 behind this is that bare CRs in header lines are most likely either
7546 to be mistakes, or people trying to play silly games.
7548 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7549 was being incorrectly given as 18 bytes larger than it should have been.
7550 This is a VOB (very old bug).
7552 60. This may never have affected anything current, but just in case it has:
7553 When the local host is found other than at the start of a list of hosts,
7554 the local host, those with the same MX, and any that follow, are discarded.
7555 When the list in question was part of a longer list of hosts, the following
7556 hosts (not currently being processed) were also being discarded. This no
7557 longer happens. I'm not sure if this situation could ever has previously
7560 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7563 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7564 header. This is something that is recommended in a new Internet Draft, and
7565 is something that is documented as being done by Sendmail. There are two
7566 possible values. For messages generated by the autoreply transport, Exim
7569 Auto-Submitted: auto-replied
7571 whereas for all other generated messages (e.g. bounces) it adds
7573 Auto-Submitted: auto-generated
7575 63. The "personal" condition in filters now includes a test for the
7576 Auto-Submitted: header. If it contains the string "auto-" the message it
7577 not considered personal.
7579 64. Added rcpt_include_affixes as a generic transport option.
7581 65. Added queue_only_override (default true).
7583 66. Added the syslog_duplication option.
7585 67. If what should have been the first header line of a message consisted of
7586 a space followed by a colon, Exim was mis-interpreting it as a header line.
7587 It isn't of course - it is syntactically invalid and should therefore be
7588 treated as the start of the message body. The misbehaviour could have
7589 caused a number of strange effects, including loss of data in subsequent
7590 header lines, and spool format errors.
7592 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7593 client host had authenticated. This control can now be exercised by an ACL
7594 for more flexibility.
7596 69. By default, callouts do not happen when testing with -bh. There is now a
7597 variant, -bhc, which does actually run the callout code, including
7598 consulting and updating the callout cache.
7600 70. Added support for saslauthd authentication, courtesy of Alexander
7603 71. If statvfs() failed on the spool or log directories while checking their
7604 size for availability, Exim confusingly gave the error "space shortage".
7605 Furthermore, in debugging mode it crashed with a floating point exception.
7606 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7607 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7608 serious problem, Exim now writes to the main and panic logs when this
7609 happens, with details of the failure. It then refuses to accept the
7610 incoming message, giving the message "spool directory problem" or "log
7611 directory problem" with a 421 code for SMTP messages.
7613 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7614 0, 1, and 2 exist, because some OS complain for execs without them (see
7615 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7616 descriptors. However, the code omitted to check that the open succeeded,
7617 causing mysterious errors if for some reason the permissions on /dev/null
7618 got screwed. Now Exim writes a message to the main and panic logs, and
7619 bombs out if it can't open /dev/null.
7621 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7622 interact so that it is all more flexible. It is supposed to remain
7623 backwards compatible. Also added extra_local_interfaces.
7625 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7626 to bomb out with an assertion failure - to the client this appears as a
7627 connection drop. This problem occurs in the part of the code that was taken
7628 from the Samba project. Fortunately, the assertion is in a very simple
7629 function, so I have fixed this by reproducing the function inline in the
7630 one place where it is called, and arranging for authentication to fail
7631 instead of killing the process with assert().
7633 75. The SPA client code was not working when the server requested OEM rather
7634 than Unicode encoding.
7636 76. Added code to make require_files with a specific uid setting more usable in
7637 the case where statting the file as root fails - usually a non-root-mounted
7638 NFS file system. When this happens and the failure is EACCES, Exim now
7639 forks a subprocess and does the per-uid checking as the relevant uid.
7641 77. Added process_log_path.
7643 78. If log_file_path was not explicitly set, a setting of check_log_space or
7644 check_log_inodes was ignored.
7646 79. If a space check for the spool or log partitions fails, the incident is now
7647 logged. Of course, in the latter case the data may get lost...
7649 80. Added the %p formatting code to string_format() so that it can be used to
7650 print addresses in debug_print(). Adjusted all the address printing in the
7651 debugging in store.c to use %p rather than %d.
7653 81. There was a concern that a line of code in smtp_in.c could overflow a
7654 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7655 initially expressed, the concern was not well-founded, because trailing
7656 spaces are removed early. However, if the trailing spaces were followed by
7657 a NULL, they did not get removed, so the overflow was possible. Two fixes
7660 (a) I re-wrote the offending code in a cleaner fashion.
7661 (b) If an incoming SMTP command contains a NULL character, it is rejected
7664 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7665 runs initgroups(), so that if the Exim user is in any additional groups,
7666 they will be used during message reception.
7672 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob