1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/01 Remove code calling the customisable local_scan function, unless a new
12 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
14 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
15 non-signal-safe functions being used.
17 JH/03 Bug 2269: When presented with a received message having a stupidly large
18 number of DKIM-Signature headers, disable DKIM verification to avoid
19 a resource-consumption attack. The limit is set at twenty.
21 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
22 report of oldest_pass in ${authres } in consequence, and separate out
23 some descriptions of reasons for verification fail.
25 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
26 files in the spool were present and unlocked. A queue-runner could spot
27 them, resulting in a duplicate delivery. Fix that by doing the unlock
28 after the unlink. Investigation by Tim Stewart. Take the opportunity to
29 add more error-checking on spoolfile handling while that code is being
32 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
33 No known attacks, no CVE, this is defensive hardening.
35 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
36 a queue-runner could start a delivery while other operations were ongoing.
37 Cutthrough delivery was a common victim, resulting in duplicate delivery.
38 Found and investigated by Tim Stewart. Fix by using the open message data
39 file handle rather than opening another, and not locally closing it (which
40 releases a lock) for that case, while creating the temporary .eml format
41 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
43 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
44 $sender_verify_failure/$recipient_verify_failure to "random".
46 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
49 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
50 Previously this would segfault.
52 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
55 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
56 like zero, since the resolver should be doing this for us, But we need one
57 as a CNAME but no MX presence gets the CNAME returned; we need to check
58 that doesn't point to an MX to declare it "no MX returned" rather than
59 "error, loop". A new main option is added so the older capability of
60 following some limited number of chain links is maintained.
62 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
64 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
65 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
66 now-deprecated earlier definitions used only specified the range up to TLS
67 1.2 (in the older-version library docs).
69 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
71 JH/15 Rework TLS client-side context management. Stop using a global, and
72 explicitly pass a context around. This enables future use of TLS for
73 connections to service-daemons (eg. malware scanning) while a client smtp
74 connection is using TLS; with cutthrough connections this is quite likely.
76 JH/16 Fix ARC verification to do AS checks in reverse order.
78 JH/17 Support a "tls" option on the ${readsocket } expansion item.
80 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
81 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
82 Previously the "utf8" would be re-prepended for every additional message.
84 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
85 Previously thery were accepted, resulting in issues when attempting to
86 forward messages to a non-supporting MTA.
88 PP/02 Let -n work with printing macros too, not just options.
90 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
91 one parent address was copied, and bogus data was used at delivery-logging
92 time. Either a crash (after delivery) or bogus log data could result.
93 Discovery and analysis by Tim Stewart.
95 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
96 Previously if the string ended mid-character, we did not insert the
97 promised '?' replacement.
99 PP/04 Documentation: current string operators work on bytes, not codepoints.
101 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
102 should pack well giving a smaller memory footprint so better caching and
103 therefore performance. Group the declarations where this can't be done so
104 that the byte-sized flag variables are not interspersed among pointer
105 variables, giving a better chance of good packing by the compiler.
107 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
108 non-null, to avoid issues with sites running BATV. Previously reports were
109 sent with an empty envelope sender so looked like bounces.
111 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
112 The ignore_error flag wasn't being returned from the filter subprocess so
113 was not set for later routers. Investigation and fix by Matthias Kurz.
115 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
116 and a msg:complete for the whole, when a message is manually removed using
117 -Mrm. Developement by Matthias Kurz, hacked on by JH.
119 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
120 a "Gnu special" function, asprintf() in the DB utility binary builds; I
121 hope that is portable enough.
123 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
124 requiring a known-CA anchor certificate; make it now rely entirely on the
125 TLSA as an anchor. Checking the name on the leaf cert against the name
126 on the A-record for the host is still done for TA (but not for EE mode).
128 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
129 included in delivery lines for non-proxied connections, when compiled with
130 SUPPORT_SOCKS and running with proxy logging enabled.
132 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
133 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
134 move the existing event to fire before the normal logging of message
135 failure so that custom logging is bracketed by normal logging.
137 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
138 msg:fail:internal event. Developement by Matthias Kurz.
144 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
145 When redis_servers is set to a list of > 1 element, and the Redis servers
146 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
147 case of MOVED into a DEFER case instead, thus moving the query onto the
148 next server in the list. For a cluster of N elements, all N servers must
149 be defined in redis_servers.
151 GF/02 Catch and remove uninitialized value warning in exiqsumm
152 Check for existence of @ARGV before looking at $ARGV[0]
154 JH/01 Replace the store_release() internal interface with store_newblock(),
155 which internalises the check required to safely use the old one, plus
156 the allocate and data copy operations duplicated in both (!) of the
157 extant use locations.
159 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
160 modifier. This matches the restriction on the commandline.
162 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
163 Previously only the last row was returned.
165 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
166 we assumed that tags in the header were well-formed, and parsed the
167 element content after inspecting only the first char of the tag.
168 Assumptions at that stage could crash the receive process on malformed
171 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
172 While running the DKIM ACL we operate on the Permanent memory pool so that
173 variables created with "set" persist to the DATA ACL. Also (at any time)
174 DNS lookups that fail create cache records using the Permanent pool. But
175 expansions release any allocations made on the current pool - so a dnsdb
176 lookup expansion done in the DKIM ACL releases the memory used for the
177 DNS negative-cache, and bad things result. Solution is to switch to the
178 Main pool for expansions.
179 While we're in that code, add checks on the DNS cache during store_reset,
180 active in the testsuite.
181 Problem spotted, and debugging aided, by Wolfgang Breyha.
183 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
184 When none of the hosts presented to a transport match an already-open
185 connection, close it and proceed with the list. Previously we would
186 queue the message. Spotted by Lena with Yahoo, probably involving
189 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
190 Previously a spurious "250 OK id=" response was appended to the proper
193 JH/08 The "support for" informational output now, which built with Content
194 Scanning support, has a line for the malware scanner interfaces compiled
195 in. Interface can be individually included or not at build time.
197 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
198 by the template makefile "src/EDITME". The "STREAM" support for an older
199 ClamAV interface method is removed.
201 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
202 rows affected is given instead).
204 JH/11 The runtime Berkeley DB library version is now additionally output by
205 "exim -d -bV". Previously only the compile-time version was shown.
207 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
208 SMTP connection. Previously, when one had more receipients than the
209 first, an abortive onward connection was made. Move to full support for
210 multiple onward connections in sequence, handling cutthrough connection
211 for all multi-message initiating connections.
213 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
214 routers. Previously, a multi-recipient message would fail to match the
215 onward-connection opened for the first recipient, and cause its closure.
217 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
218 a timeout on read on a GnuTLS initiating connection, resulting in the
219 initiating connection being dropped. This mattered most when the callout
220 was marked defer_ok. Fix to keep the two timeout-detection methods
223 JH/15 Relax results from ACL control request to enable cutthrough, in
224 unsupported situations, from error to silently (except under debug)
225 ignoring. This covers use with PRDR, frozen messages, queue-only and
228 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
230 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
231 metadata, resulting in a crash in free().
233 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
234 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
235 Broken also in d185889f4, with init system revamp.
237 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
238 Previously we abruptly closed the connection after reading a malware-
239 found indication; now we go on to read the "scan ok" response line,
242 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
243 ACL. Previously, a crash would result.
245 JH/19 Speed up macro lookups during configuration file read, by skipping non-
246 macro text after a replacement (previously it was only once per line) and
247 by skipping builtin macros when searching for an uppercase lead character.
249 JH/20 DANE support moved from Experimental to mainline. The Makefile control
250 for the build is renamed.
252 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
253 was allocated for every new TLS startup, meaning one per message. Fix
254 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
256 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
257 reported the original. Fix to report (as far as possible) the ACL
258 result replacing the original.
260 JH/23 Fix memory leak during multi-message connections using STARTTLS under
261 OpenSSL. Certificate information is loaded for every new TLS startup,
262 and the resources needed to be freed.
264 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
266 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
269 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
270 DATA response info to the (existing) per-recipient response info for
271 the "C=" log element. It can have useful tracking info from the
272 destination system. Patch from Simon Arlott.
274 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
275 length value. Previously this would segfault.
277 HS/02 Support Avast multiline protoocol, this allows passing flags to
278 newer versions of the scanner.
280 JH/28 Ensure that variables possibly set during message acceptance are marked
281 dead before release of memory in the daemon loop. This stops complaints
282 about them when the debug_store option is enabled. Discovered specifically
283 for sender_rate_period, but applies to a whole set of variables.
284 Do the same for the queue-runner and queue-list loops, for variables set
285 from spool message files. Do the same for the SMTP per-message loop, for
286 certain variables indirectly set in ACL operations.
288 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
289 as a multi-recipient message from a mailinglist manager). The coding had
290 an arbitrary cutoff number of characters while checking for more input;
291 enforced by writing a NUL into the buffer. This corrupted long / fast
292 input. The problem was exposed more widely when more pipelineing of SMTP
293 responses was introduced, and one Exim system was feeding another.
294 The symptom is log complaints of SMTP syntax error (NUL chars) on the
295 receiving system, and refused recipients seen by the sending system
296 (propating to people being dropped from mailing lists).
297 Discovered and pinpointed by David Carter.
299 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
300 replaced by the ${authresults } expansion.
302 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
304 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
305 allows proper process termination in container environments.
307 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
308 Previously the "final dot" had a newline after it; ensure it is CR,LF.
310 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
311 and "err_perm", deprecated since 4.83 when the RFC-defined words
312 "temperror" and "permerror" were introduced.
314 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
315 transport-filters or DKIM-signing. The restriction was lost in the
316 consolidation of verify-callout and delivery SMTP handling.
317 Extend the restriction to also cover ARC-signing.
319 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
320 in defer=pass mode supply a 450 to the initiator. Previously the message
323 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
324 tls_require_ciphers is used as before.
326 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
327 "pass_unscanned". Only tmpfails from the scanner are written to
328 the paniclog, as they may require admin intervention (permission
329 denied, license issues). Other scanner errors (like decompression
330 bombs) do not cause a paniclog entry.
332 JH/36 Fix reinitialisation of DKIM logging variable between messages.
333 Previously it was possible to log spurious information in receive log
336 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
337 triggered odd behaviour from Outlook Express clients.
339 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
342 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
343 since the IETF WG has not yet settled on that versus the original
344 "bare" representation.
346 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
347 Previously the millisecond value corrupted the output.
348 Fix also for syslog_pid=no and log_selector +pid, for which the pid
349 corrupted the output.
355 JH/01 Rework error string handling in TLS interface so that the caller in
356 more cases is responsible for logging. This permits library-sourced
357 string to be attached to addresses during delivery, and collapses
358 pairs of long lines into single ones.
360 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
361 during configuration. Wildcards are allowed and expanded.
363 JH/02 Rework error string handling in DKIM to pass more info back to callers.
364 This permits better logging.
366 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
367 do not close it down and have the child transport start it up again on
368 the passed-on TCP connection. Instead, proxy the child (and any
369 subsequent ones) for TLS via a unix-domain socket channel. Logging is
370 affected: the continued delivery log lines do not have any DNSSEC, TLS
371 Certificate or OCSP information. TLS cipher information is still logged.
373 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
374 identical IP addresses on different listening ports. Will also affect
377 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
378 add noisy ifdef guards to special-case this sillyness.
379 Patch from Bernd Kuhls.
381 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
382 than 255 are no longer allowed.
384 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
385 Disable the session-cache too, which might reduce our load. Since we
386 currrectly use a new context for every connection, both as server and
387 client, there is no benefit for these.
388 GnuTLS appears to not support tickets server-side by default (we don't
389 call gnutls_session_ticket_enable_server()) but client side is enabled
390 by default on recent versions (3.1.3 +) unless the PFS priority string
393 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
394 <https://reproducible-builds.org/specs/source-date-epoch/>.
396 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
397 the check for any unsuccessful recipients did not notice the limit, and
398 erroneously found still-pending ones.
400 JH/08 Pipeline CHUNKING command and data together, on kernels that support
401 MSG_MORE. Only in-clear (not on TLS connections).
403 JH/09 Avoid using a temporary file during transport using dkim. Unless a
404 transport-filter is involved we can buffer the headers in memory for
405 creating the signature, and read the spool data file once for the
406 signature and again for transmission.
408 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
409 4.77 as the kernel support then wasn't solid, having issues in 64bit
410 mode. Now, it's been long enough. Add support for FreeBSD also.
412 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
413 case where the routing stage had gathered several addresses to send to
414 a host before calling the transport for the first, we previously failed
415 to close down TLS in the old transport process before passing the TCP
416 connection to the new process. The new one sent a STARTTLS command
417 which naturally failed, giving a failed delivery and bloating the retry
418 database. Investigation and fix prototype from Wolfgang Breyha.
420 JH/12 Fix check on SMTP command input synchronisation. Previously there were
421 false-negatives in the check that the sender had not preempted a response
422 or prompt from Exim (running as a server), due to that code's lack of
423 awareness of the SMTP input buffering.
425 PP/04 Add commandline_checks_require_admin option.
426 Exim drops privileges sanely, various checks such as -be aren't a
427 security problem, as long as you trust local users with access to their
428 own account. When invoked by services which pass untrusted data to
429 Exim, this might be an issue. Set this option in main configuration
430 AND make fixes to the calling application, such as using `--` to stop
433 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
434 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
435 responses to those, into a single TLS record each way (this usually means
436 a single packet). As a side issue, smtp_enforce_sync now works on TLS
439 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
440 affects you only if you're dancing at the edge of the param size limits.
441 If you are, and this message makes sense to you, then: raise the
442 configured limit or use OpenSSL 1.1. Nothing we can do for older
445 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
446 cmdline element to get the documented default one. Previously it was
449 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
450 are unsuable for non-message-specific reasons - eg. connection timeout,
451 banner-time rejection.
453 JH/16 Fix logging of delivery remote port, when specified by router, under
456 PP/06 Repair manualroute's ability to take options in any order, even if one
457 is the name of a transport.
460 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
462 JH/17 Change the list-building routines interface to use the expanding-string
463 triplet model, for better allocation and copying behaviour.
465 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
466 Previously it was constructed the first time a possibly-matching string
467 was met in the configuration file input during startup; now it is done
470 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
471 compatible one, to avoid the (poorly documented) possibility of a config
472 file in the working directory redirecting the DB files, possibly correpting
473 some existing file. CVE-2017-10140 assigned for BDB.
475 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
476 cache-hot. Previously, although the result was properly cached, the
477 initial verify call returned a defer.
479 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
480 the main verify for receipient in uncached-mode.
482 JH/22 Retire historical build files to an "unsupported" subdir. These are
483 defined as "ones for which we have no current evidence of testing".
485 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
486 if present. Previously it was ignored.
488 JH/24 Start using specified-initialisers in C structure init coding. This is
489 a C99 feature (it's 2017, so now considered safe).
491 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
492 if was a fixed-sized field and bitmask ops via macros; it is now more
495 PP/07 GitHub PR 56: Apply MariaDB build fix.
496 Patch provided by Jaroslav Škarvada.
498 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
499 during Coverity cleanups [4.87 JH/47]
500 Diagnosis and fix provided by Michael Fischer v. Mollard.
502 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
503 the right size to place the terminating semicolon on its own folded
504 line, the header hash was calculated to an incorrect value thanks to
505 the (relaxed) space the fold became.
507 HS/02 Fix Bug 2130: large writes from the transport subprocess where chunked
508 and confused the parent.
510 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
511 which could crash as a result. This could lead to undeliverable messages.
513 JH/28 Logging: "next input sent too soon" now shows where input was truncated
516 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
517 matters on fast-turnover and PID-randomising systems, which were getting
518 out-of-order delivery.
520 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
521 a possibly-overlapping copy. The symptom was that "Remote host closed
522 connection in response to HELO" was logged instead of the actual 4xx
525 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
526 Previously only that bufferd was discarded, resulting in SYMTP command
529 JH/32 DKIM: when a message has multiple signatures matching an identity given
530 in dkim_verify_signers, run the dkim acl once for each. Previously only
531 one run was done. Bug 2189.
533 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
534 "panic the current process" to "deliberately defer". The panic log is
535 still written with the problem list name; the mail and reject logs now
536 get a temp-reject line for the message that was being handled, saying
537 something like "domains check lookup or other defer". The SMTP 451
538 message is still "Temporary local problem".
540 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
541 A crafted sequence of BDAT commands could result in in-use memory beeing
542 freed. CVE-2017-16943.
544 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
545 from SMTP input. Previously it was always done; now only done for DATA
546 and not BDAT commands. CVE-2017-16944.
548 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
549 to the message (such as an overlong header line). Previously this was
550 not done and we did not exit BDAT mode. Followon from the previous item
551 though a different problem.
557 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
558 than -2003 did; needs libidn2 in addition to libidn.
560 JH/02 The path option on a pipe transport is now expanded before use.
562 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
563 Patch provided by "Björn", documentation fix added too.
565 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
566 missing a wire-to-host endian conversion.
568 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
569 close after a BDAT command line could be taken as a following command,
570 giving a synch failure. Fix by only checking for synch immediately
571 before acknowledging the chunk.
573 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
574 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
575 macro. Patches provided by Josh Soref.
577 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
578 Previously we did not; the RFC seems ambiguous and VRFY is not listed
579 by IANA as a service extension. However, John Klensin suggests that we
582 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
583 the dkim code may be unix-mode line endings rather than smtp wire-format
584 CRLF, so prepend a CR to any bare LF.
586 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
587 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
589 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
590 the first were themselves being wrongly included in the feed into dkim
591 processing; with most chunk sizes in use this resulted in an incorrect
592 body hash calculated value.
594 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
595 DKIM signature block, for verification. Although advised against by
596 standards it is specifically not ruled illegal.
598 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
600 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
601 missing a body hash (the bh= tag).
603 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
604 It seems that HAProxy sends the Proxy Protocol information in clear and
605 only then does a TLS startup, so do the same.
607 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
608 TCP connections (such as for Spamd) unless the daemon successfully set
609 Fast Open mode on its listening sockets. This fixes breakage seen on
610 too-old kernels or those not configured for Fast Open, at the cost of
611 requiring both directions being enabled for TFO, and TFO never being used
612 by non-daemon-related Exim processes.
614 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
615 endings, at least on the first header line. Try to canonify any that get
616 past that check, despite the cost.
618 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
619 now limited to an arbitrary five deep, while parsing addresses with the
620 strip_excess_angle_brackets option enabled.
622 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
623 instead leave the unprompted TLS handshake in socket buffer for the
624 TLS library to consume.
626 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
628 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
630 JH/16 Drop variables when they go out of scope. Memory management drops a whole
631 region in one operation, for speed, and this leaves assigned pointers
632 dangling. Add checks run only under the testsuite which checks all
633 variables at a store-reset and panics on a dangling pointer; add code
634 explicitly nulling out all the variables discovered. Fixes one known
635 bug: a transport crash, where a dangling pointer for $sending_ip_address
636 originally assigned in a verify callout, is re-used.
638 PP/06 Drop '.' from @INC in various Perl scripts.
640 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
642 PP/08 Reduce a number of compilation warnings under clang; building with
643 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
644 should be warning-free.
646 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
648 HS/01 Fix portability problems introduced by PP/08 for platforms where
649 realloc(NULL) is not equivalent to malloc() [SunOS et al].
651 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
652 chunk. This allows us to accept broken chunked messages. We need a more
653 general solution here.
655 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
656 already-broken messages in the queue.
658 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
660 JH/19 Fix reference counting bug in routing-generated-address tracking.
666 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
667 supports it and a size is available (ie. the sending peer gave us one).
669 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
670 years of being deprecated). The replacements are the ACLs
671 acl_smtp_mime and acl_not_smtp_mime.
673 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
674 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
675 or even an in-clear connection were permitted. Now, if the host lookup
676 was dnssec and dane was requested then the host is only used if the
677 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
678 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
679 if one fails this test.
680 This means that a poorly-configured remote DNS will make it incommunicado;
681 but it protects against a DNS-interception attack on it.
683 JH/04 Bug 1810: make continued-use of an open smtp transport connection
684 non-noisy when a race steals the message being considered.
686 JH/05 If main configuration option tls_certificate is unset, generate a
687 self-signed certificate for inbound TLS connections.
689 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
690 in rewrites and routers.
692 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
693 and logged a warning sing 4.83; now they are a configuration file error.
695 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
696 (lacking @domain). Apply the same qualification processing as RCPT.
698 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
700 JH/10 Support ${sha256:} applied to a string (as well as the previous
703 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
704 a cutthrough deliver is pending, as we always want to make a connection.
705 This also avoids re-routing the message when later placing the cutthrough
706 connection after a verify cache hit.
707 Do not update it with the verify result either.
709 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
710 when routing results in more than one destination address.
712 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
713 signing (which inhibits the cutthrough capability). Previously only
714 the presence of an option was tested; now an expansion evaluating as
715 empty is permissible (obviously it should depend only on data available
716 when the cutthrough connection is made).
718 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
719 the relevant preceding SMTP command did not note the pipelining mode.
721 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
722 Previously they were not counted.
724 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
725 as one having no matching records. Previously we deferred the message
726 that needed the lookup.
728 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
729 distinguished as "(=".
731 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
732 for missing MX records. Previously it only worked for missing A records.
734 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
736 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
737 after the data-go-ahead and data-ack. Patch from Jason Betts.
739 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
740 even for a "none" policy. Patch from Tony Meyer.
742 JH/22 Fix continued use of a connection for further deliveries. If a port was
743 specified by a router, it must also match for the delivery to be
746 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
747 When one of the recipients of a message was unsuitable for the connection
748 (has no matching addresses), we lost track of needing to mark it
749 deferred. As a result mail would be lost.
751 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
753 JH/25 Decoding ACL controls is now done using a binary search; the source code
754 takes up less space and should be simpler to maintain. Merge the ACL
755 condition decode tables also, with similar effect.
757 JH/26 Fix problem with one_time used on a redirect router which returned the
758 parent address unchanged. A retry would see the parent address marked as
759 delivered, so not attempt the (identical) child. As a result mail would
762 JH/27 Fix a possible security hole, wherein a process operating with the Exim
763 UID can gain a root shell. Credit to http://www.halfdog.net/ for
764 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
767 JH/28 Enable {spool,log} filesystem space and inode checks as default.
768 Main config options check_{log,spool}_{inodes,space} are now
769 100 inodes, 10MB unless set otherwise in the configuration.
771 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
772 Previously it only applied to the main-section connection policy
775 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
777 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
778 by me. Added RFC7919 DH primes as an alternative.
780 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
781 are not in the system include path.
783 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
784 GnuTLS, when a session startup failed (eg because the client disconnected)
785 Exim did stdio operations after fclose. This was exposed by a recent
786 change which nulled out the file handle after the fclose.
788 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
789 signed directly by the cert-signing cert, rather than an intermediate
790 OCSP-signing cert. This is the model used by LetsEncrypt.
792 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
794 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
795 an incoming connection.
797 HS/02 Bug 1802: Do not half-close the connection after sending a request
800 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
801 fallback to "prime256v1".
803 JH/34 SECURITY: Use proper copy of DATA command in error message.
804 Could leak key material. Remotely exploitable. CVE-2016-9963.
810 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
811 and 3.4.4 - once the server is enabled to respond to an OCSP request
812 it does even when not requested, resulting in a stapling non-aware
813 client dropping the TLS connection.
815 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
816 support variable-length bit vectors. No functional change.
818 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
819 The I= interface field on outgoing lines is now after the H= remote
820 host field, same as incoming lines. There is a separate
821 outgoing_interface log selector which allows you to disable the
824 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
825 If not running log_selector +smtp_connection the mainlog would be held
826 open indefinitely after a "too many connections" event, including to a
827 deleted file after a log rotate. Leave the per net connection logging
828 leaving it open for efficiency as that will be quickly detected by the
829 check on the next write.
831 HS/01 Bug 1671: Fix post transport crash.
832 Processing the wait-<transport> messages could crash the delivery
833 process if the message IDs didn't exist for some reason. When
834 using 'split_spool_directory=yes' the construction of the spool
835 file name failed already, exposing the same netto behaviour.
837 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
838 mime_regex ACL conditions.
840 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
841 to DSN fail messages (bounces): remote IP, remote greeting, remote response
842 to HELO, local diagnostic string.
844 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
845 log line to debug. Even when configured with a tls authenticator many
846 client connections are expected to not authenticate in this way, so
847 an authenticate fail is not an error.
849 HS/02 Add the Exim version string to the process info. This way exiwhat
850 gives some more detail about the running daemon.
852 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
853 matter for fast-change records such as DNSBLs.
855 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
856 retry record, even if constant. There may be multiple transports with
857 different interface settings and the retry behaviour needs to be kept
860 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
862 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
864 JH/10 Bug 840: fix log_defer_output option of pipe transport
866 JH/11 Bug 830: use same host for all RCPTS of a message, even under
867 hosts_randomize. This matters a lot when combined with mua_wrapper.
869 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
870 ${quote_pgsql:<string>} operator.
872 JH/13 Bug 1708: avoid misaligned access in cached lookup.
874 JH/14 Change header file name for freeradius-client. Relevant if compiling
875 with Radius support; from the Gentoo tree and checked under Fedora.
877 JH/15 Bug 1712: Introduce $prdr_requested flag variable
879 JH/16 Bug 1714: Permit an empty string as expansion result for transport
880 option transport_filter, meaning no filtering.
882 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
884 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
885 defaults to "*" (all hosts). The variable is now available when not built
886 with TLS, default unset, mainly to enable keeping the testsuite sane.
887 If a server certificate is not supplied (via tls_certificate) an error is
888 logged, and clients will find TLS connections fail on startup. Presumably
889 they will retry in-clear.
890 Packagers of Exim are strongly encouraged to create a server certificate
891 at installation time.
893 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
894 with the $config_file variable.
896 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
897 in transport context, after the attempt, and per-recipient. The latter type
898 is per host attempted. The event data is the error message, and the errno
899 information encodes the lookup type (A vs. MX) used for the (first) host,
900 and the trailing two digits of the smtp 4xx response.
902 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
903 to write to mainlog (or rejectlog, paniclog) in the window between file
904 creation and permissions/ownership being changed. Particularly affects
905 installations where exicyclog is run as root, rather than exim user;
906 result is that the running daemon panics and dies.
908 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
910 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
911 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
912 "pri" and "weight". Note that the previous implicit priority given by the
913 list order is no longer honoured.
915 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
918 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
919 by defining SUPPORT_SOCKS.
921 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
922 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
923 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
924 variables are renamed to proxy_{local,external}_{address,port}.
926 JH/27 Move Internationalisation support from Experimental to mainline, enabled
927 for a build by defining SUPPORT_I18N
929 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
930 of the query string, and make ${quote_redis:} do that quoting.
932 JH/29 Move Events support from Experimental to mainline, enabled by default
933 and removable for a build by defining DISABLE_EVENT.
935 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
937 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
938 cached by the daemon.
940 JH/32 Move Redis support from Experimental to mainline, enabled for a build
941 by defining LOOKUP_REDIS. The libhiredis library is required.
943 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
944 keys are given for lookup.
946 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
947 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
948 only supported when built with TLS support. The PolarSSL SHA routines
949 are still used when the TLS library is too old for convenient support.
951 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
952 openssl_options), for security. OpenSSL forces this from version 1.1.0
953 server-side so match that on older versions.
955 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
956 allocation for $value could be released as the expansion processing
957 concluded, but leaving the global pointer active for it.
959 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
960 and to use the domains and local_parts ACL conditions.
962 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
963 incorrectly not doubled on cutthrough transmission, hence seen as a
964 body-termination at the receiving system - resulting in truncated mails.
965 Commonly the sender saw a TCP-level error, and retransmitted the message
966 via the normal store-and-forward channel. This could result in duplicates
967 received - but deduplicating mailstores were liable to retain only the
968 initial truncated version.
970 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
972 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
974 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
975 we're in there, support oversigning also; bug 1309.
977 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
979 HS/04 Add support for keep_environment and add_environment options.
981 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
982 either intentional arithmetic overflow during PRNG, or testing config-
985 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
986 delivery resulted in actual delivery. Cancel cutthrough before DATA
989 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
990 rejects a recipient: pass the reject to the originator.
992 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
993 Many were false-positives and ignorable, but it's worth fixing the
996 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
997 for the new environment-manipulation done at startup. Move the routines
998 from being local to tls.c to being global via the os.c file.
1000 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1001 an extract embedded as result-arg for a map, the first arg for extract
1002 is unavailable so we cannot tell if this is a numbered or keyed
1003 extraction. Accept either.
1009 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1012 JH/02 The smtp transport option "multi_domain" is now expanded.
1014 JH/03 The smtp transport now requests PRDR by default, if the server offers
1017 JH/04 Certificate name checking on server certificates, when exim is a client,
1018 is now done by default. The transport option tls_verify_cert_hostnames
1019 can be used to disable this per-host. The build option
1020 EXPERIMENTAL_CERTNAMES is withdrawn.
1022 JH/05 The value of the tls_verify_certificates smtp transport and main options
1023 default to the word "system" to access the system default CA bundle.
1024 For GnuTLS, only version 3.0.20 or later.
1026 JH/06 Verification of the server certificate for a TLS connection is now tried
1027 (but not required) by default. The verification status is now logged by
1028 default, for both outbound TLS and client-certificate supplying inbound
1031 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1034 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1035 Status Notification (bounce) messages are now MIME format per RFC 3464.
1036 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1037 under the control of the dsn_advertise_hosts option, and routers may
1038 have a dsn_lasthop option.
1040 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1041 default, modifiable by a malware= option. The list separator for
1042 the options can now be changed in the usual way. Bug 68.
1044 JH/10 The smtp_receive_timeout main option is now expanded before use.
1046 JH/11 The incoming_interface log option now also enables logging of the
1047 local interface on delivery outgoing connections.
1049 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1050 if the interface and destination host and port all match.
1052 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1055 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1056 Patch from Andrew Lewis.
1058 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1059 now supports optional time-restrictions, weighting, and priority
1060 modifiers per server. Patch originally by <rommer@active.by>.
1062 JH/16 The spamd_address main option now supports a mixed list of local
1063 and remote servers. Remote servers can be IPv6 addresses, and
1064 specify a port-range.
1066 JH/17 Bug 68: The spamd_address main option now supports an optional
1067 timeout value per server.
1069 JH/18 Bug 1581: Router and transport options headers_add/remove can
1070 now have the list separator specified.
1072 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1075 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1078 JH/21 Support for the A6 type of dns record is withdrawn.
1080 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1081 rather than the verbs used.
1083 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1084 from 255 to 1024 chars.
1086 JH/24 Verification callouts now attempt to use TLS by default.
1088 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1089 are generic router options now. The defaults didn't change.
1091 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1092 Original patch from Alexander Shikoff, worked over by JH.
1094 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1095 files if ZCAT_COMMAND is not executable.
1097 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1099 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1101 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1102 Normally benign, it bites when the pair was led to by a CNAME;
1103 modern usage is to not canonicalize the domain to a CNAME target
1104 (and we were inconsistent anyway for A-only vs AAAA+A).
1106 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1108 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1109 when evaluating $sender_host_dnssec.
1111 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1112 $sender_helo_dnssec variable.
1114 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1116 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1118 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1120 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1121 documented as working, but never had. Support all but $spam_report.
1123 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1124 added for tls authenticator.
1126 HS/03 Add perl_taintmode main config option
1132 TL/01 When running the test suite, the README says that variables such as
1133 no_msglog_check are global and can be placed anywhere in a specific
1134 test's script, however it was observed that placement needed to be near
1135 the beginning for it to behave that way. Changed the runtest perl
1136 script to read through the entire script once to detect and set these
1137 variables, reset to the beginning of the script, and then run through
1138 the script parsing/test process like normal.
1140 TL/02 The BSD's have an arc4random API. One of the functions to induce
1141 adding randomness was arc4random_stir(), but it has been removed in
1142 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1143 function when detected.
1145 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1146 cause callback expansion.
1148 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1149 syntax errors in an expansion can be treated as a string instead of
1150 logging or causing an error, due to the internal use of bool_lax
1151 instead of bool when processing it.
1153 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1154 server certificates when making smtp deliveries.
1156 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1158 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1160 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1162 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1163 Merged patch from Sebastian Wiedenroth.
1165 JH/05 Fix results-pipe from transport process. Several recipients, combined
1166 with certificate use, exposed issues where response data items split
1167 over buffer boundaries were not parsed properly. This eventually
1168 resulted in duplicates being sent. This issue only became common enough
1169 to notice due to the introduction of connection certificate information,
1170 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1172 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1173 size buffer was used, resulting in syntax errors when an expansion
1176 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1177 version 3.3.6 or later.
1179 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1180 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1181 both become "event_action", the variables become $event_name, $event_data
1182 and $event_defer_errno. There is a new variable $verify_mode, usable in
1183 routers, transports and related events. The tls:cert event is now also
1184 raised for inbound connections, if the main configuration event_action
1187 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1188 early OCSP support, but no stapling (appears to be less than 1.0.0).
1190 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1191 server certificate names available under the smtp transport option
1192 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1195 JH/10 Time-related extraction expansions from certificates now use the main
1196 option "timezone" setting for output formatting, and are consistent
1197 between OpenSSL and GnuTLS compilations. Bug 1541.
1199 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1200 encoded parameter in the incoming message. Bug 1558.
1202 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1203 include certificate info, eximon was claiming there were spoolfile
1206 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1208 JH/14 Log delivery-related information more consistently, using the sequence
1209 "H=<name> [<ip>]" wherever possible.
1211 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1212 are problematic for Debian distribution, omit them from the release
1215 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1217 JH/16 Fix string representation of time values on 64bit time_t architectures.
1220 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1221 output list separator was used.
1226 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1227 checkers that were complaining about end of non-void function with no
1230 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1231 This was a regression introduced in 4.83 by another bugfix.
1233 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1235 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1236 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1242 TF/01 Correctly close the server side of TLS when forking for delivery.
1244 When a message was received over SMTP with TLS, Exim failed to clear up
1245 the incoming connection properly after forking off the child process to
1246 deliver the message. In some situations the subsequent outgoing
1247 delivery connection happened to have the same fd number as the incoming
1248 connection previously had. Exim would try to use TLS and fail, logging
1249 a "Bad file descriptor" error.
1251 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1252 utilities have not been installed.
1254 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1255 temporary space as the ACL may create new global variables.
1257 TL/01 LDAP support uses per connection or global context settings, depending
1258 upon the detected version of the libraries at build time.
1260 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1261 to extract and use the src ip:port in logging and expansions as if it
1262 were a direct connection from the outside internet. PPv2 support was
1263 updated based on HAProxy spec change in May 2014.
1265 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1267 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1268 Properly escape header and check for NULL return.
1270 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1273 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1275 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1276 characters in header names, implemented as a verify condition.
1277 Contributed by Michael Fischer v. Mollard.
1279 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1280 results permerror and temperror. Previous values are deprecated but
1281 still accepted. In a future release, err_perm and err_temp will be
1282 completely removed, which will be a backward incompatibility if the
1283 ACL tests for either of these two old results. Patch contributed by
1284 user bes-internal on the mailing list.
1286 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1288 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1289 selectors, in both main and reject logs.
1291 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1294 JH/07 Add malware type "sock" for talking to simple daemon.
1296 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1298 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1299 routers/transports under cutthrough routing.
1301 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1302 numbers. Touch up "bool" conditional to keep the same definition.
1304 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1306 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1308 JH/12 Expand items in router/transport headers_add or headers_remove lists
1309 individually rather than the list as a whole. Bug 1452.
1311 Required for reasonable handling of multiple headers_ options when
1312 they may be empty; requires that headers_remove items with embedded
1313 colons must have them doubled (or the list-separator changed).
1315 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1316 view the policy declared in the DMARC record. Currently, $dmarc_status
1317 is a combined value of both the record presence and the result of the
1320 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1322 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1323 dnslookup router and the smtp transport (applying to the forward
1326 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1327 of ldap servers used for a specific lookup. Patch provided by Heiko
1330 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1331 New variable $lookup_dnssec_authenticated for observability.
1333 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1334 Patch submitted by Lars Timman.
1336 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1338 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1339 Requires trusted mode and valid format message id, aborts otherwise.
1340 Patch contributed by Heiko Schlichting.
1342 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1343 certextract with support for various fields. Bug 1358.
1345 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1346 is requested by default, modifiable by smtp transport option
1349 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1350 operate on certificate variables to give certificate fingerprints
1351 Also new ${sha256:cert_variable}.
1353 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1355 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1356 Christian Aistleitner.
1358 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1360 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1361 file. Patch from Wolfgang Breyha.
1363 JH/25 Expand the coverage of the delivery $host and $host_address to
1364 client authenticators run in verify callout. Bug 1476.
1366 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1367 align with daemon_smtp_ports. Bug 72.
1369 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1370 support and error reporting did not work properly.
1372 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1373 and is readable. Patch from Andrew Colin Kissa.
1375 TL/14 Enhance documentation of ${run expansion and how it parses the
1376 commandline after expansion, particularly in the case when an
1377 unquoted variable expansion results in an empty value.
1379 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1381 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1382 by renaming away from it. Addresses GH issue 15, reported by
1385 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1387 TL/15 SECURITY: prevent double expansion in math comparison functions
1388 (can expand unsanitized data). Not remotely exploitable.
1395 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1397 PP/02 Make -n do something, by making it not do something.
1398 When combined with -bP, the name of an option is not output.
1400 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1403 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1404 $sender_host_name and config options to manage this, and basic check
1407 PP/05 DSCP support for outbound connections and control modifier for inbound.
1409 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1410 (Only plugin which currently uses this is kerberos4, which nobody should
1411 be using, but we should make it available and other future plugins might
1412 conceivably use it, even though it would break NAT; stuff *should* be
1413 using channel bindings instead).
1415 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1416 name; added for Sendmail compatibility; requires admin caller.
1417 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1418 just ignore it); requires trusted caller.
1419 Also parse but ignore: -Ac -Am -X<logfile>
1422 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1424 TL/02 Add +smtp_confirmation as a default logging option.
1426 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1427 Patch by Magnus Holmgren from 2007-02-20.
1429 TL/04 Bugzilla 1281 - Spec typo.
1430 Bugzilla 1283 - Spec typo.
1431 Bugzilla 1290 - Spec grammar fixes.
1433 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1435 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1437 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1438 mailing list by by Dmitry Isaikin.
1440 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1442 JH/02 Support "G" suffix to numbers in ${if comparisons.
1444 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1446 NM/01 Bugzilla 1197 - Spec typo
1447 Bugzilla 1196 - Spec examples corrections
1449 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1451 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1452 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1455 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1456 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1458 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1459 "acl {{name}{arg}...}", and optional args on acl condition
1462 JH/05 Permit multiple router/transport headers_add/remove lines.
1464 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1466 JH/07 Avoid using a waiting database for a single-message-only transport.
1467 Performance patch from Paul Fisher. Bugzilla 1262.
1469 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1472 JH/09 Add $headers_added variable, with content from use of ACL modifier
1473 add_header (but not yet added to the message). Bugzilla 199.
1475 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1476 Pulled from Bugzilla 817 by Wolfgang Breyha.
1478 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1480 (nb: this is the same fix as in Exim 4.80.1)
1482 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1485 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1488 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1490 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1491 advertise SMTP AUTH mechanism to us, instead of a generic
1492 protocol violation error. Also, make Exim more robust to bad
1493 data from the Dovecot auth socket.
1495 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1497 When a queue runner is handling a message, Exim first routes the
1498 recipient addresses, during which it prunes them based on the retry
1499 hints database. After that it attempts to deliver the message to
1500 any remaining recipients. It then updates the hints database using
1503 So if a recipient address works intermittently, it can get repeatedly
1504 deferred at routing time. The retry hints record remains fresh so the
1505 address never reaches the final cutoff time.
1507 This is a fairly common occurrence when a user is bumping up against
1508 their storage quota. Exim had some logic in its local delivery code
1509 to deal with this. However it did not apply to per-recipient defers
1510 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1512 This change adds a proper retry rule check during routing so that the
1513 final cutoff time is checked against the message's age. We only do
1514 this check if there is an address retry record and there is not a
1515 domain retry record; this implies that previous attempts to handle
1516 the address had the retry_use_local_parts option turned on. We use
1517 this as an approximation for the destination being like a local
1518 delivery, as in LMTP.
1520 I suspect this new check makes the old local delivery cutoff check
1521 redundant, but I have not verified this so I left the code in place.
1523 TF/02 Correct gecos expansion when From: is a prefix of the username.
1525 Test 0254 submits a message to Exim with the header
1529 When I ran the test suite under the user fanf2, Exim expanded
1530 the header to contain my full name, whereas it should have added
1531 a Resent-Sender: header. It erroneously treats any prefix of the
1532 username as equal to the username.
1534 This change corrects that bug.
1536 GF/01 DCC debug and logging tidyup
1537 Error conditions log to paniclog rather than rejectlog.
1538 Debug lines prefixed by "DCC: " to remove any ambiguity.
1540 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1542 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1543 Bug spotted by Jeremy Harris; was flawed since initial commit.
1544 Would have resulted in OCSP responses post-SNI triggering an Exim
1545 NULL dereference and crash.
1547 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1549 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1550 Bug detection, analysis and fix by Samuel Thibault.
1551 Bugzilla 1331, Debian bug #698092.
1553 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1555 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1556 Server implementation by Todd Lyons, client by JH.
1557 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1558 config variable "prdr_enable" controls whether the server
1559 advertises the facility. If the client requests PRDR a new
1560 acl_data_smtp_prdr ACL is called once for each recipient, after
1561 the body content is received and before the acl_smtp_data ACL.
1562 The client is controlled by both of: a hosts_try_prdr option
1563 on the smtp transport, and the server advertisement.
1564 Default client logging of deliveries and rejections involving
1565 PRDR are flagged with the string "PRDR".
1567 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1568 fclose(). Diagnosis by Todd Lyons.
1570 PP/17 Update configure.default to handle IPv6 localhost better.
1571 Patch by Alain Williams (plus minor tweaks).
1574 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1575 This is now consistent with GnuTLS, and is now documented: the
1576 previous undocumented portable approach to treating the option as
1577 unset was to force an expansion failure. That still works, and
1578 an empty string is now equivalent.
1580 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1581 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1582 not performing validation itself.
1584 PP/20 Added force_command boolean option to pipe transport.
1585 Patch from Nick Koston, of cPanel Inc.
1587 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1590 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1592 PP/21 Fix eximon continuous updating with timestamped log-files.
1593 Broken in a format-string cleanup in 4.80, missed when I repaired the
1594 other false fix of the same issue.
1595 Report and fix from Heiko Schlichting.
1598 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1599 Report from Prashanth Katuri.
1601 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1602 It's SecureTransport, so affects any MacOS clients which use the
1603 system-integrated TLS libraries, including email clients.
1605 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1606 using a MIME ACL for non-SMTP local injection.
1607 Report and assistance in diagnosis by Warren Baker.
1609 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1611 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1613 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1614 last id that failed so it may be referenced in subsequent ACL's.
1616 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1619 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1620 ldap library initialization, allowing self-signed CA's to be
1621 used. Also properly sets require_cert option later in code by
1622 using NULL (global ldap config) instead of ldap handle (per
1623 session). Bug diagnosis and testing by alxgomz.
1625 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1626 the src/util/ subdirectory.
1628 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1629 renamed to Transport Post Delivery Action by Jeremy Harris, as
1632 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1633 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1634 redis_servers = needs to be configured which will be used by the redis
1635 lookup. Patch from Warren Baker, of The Packet Hub.
1637 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1639 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1640 hostname or reverse DNS when processing a host list. Used suggestions
1641 from multiple comments on this bug.
1643 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1645 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1646 Missed a few lines, added it to make the runtest require no keyboard
1649 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1650 contains upper case chars. Make router use caseful_local_part.
1652 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1653 support when GnuTLS has been built with p11-kit.
1659 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1661 This, or similar/improved, will also be change PP/11 of 4.82.
1667 PP/01 Handle short writes when writing local log-files.
1668 In practice, only affects FreeBSD (8 onwards).
1669 Bugzilla 1053, with thanks to Dmitry Isaikin.
1671 NM/01 Bugzilla 949 - Documentation tweak
1673 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1676 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1678 PP/02 Implemented gsasl authenticator.
1680 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1682 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1683 `pkg-config foo` for cflags/libs.
1685 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1686 with rest of GSASL and with heimdal_gssapi.
1688 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1689 `pkg-config foo` for cflags/libs for the TLS implementation.
1691 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1692 properties get this fed in as external SSF. A number of robustness
1693 and debugging improvements to the cyrus_sasl authenticator.
1695 PP/08 cyrus_sasl server now expands the server_realm option.
1697 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1698 Patch by Jeremy Harris.
1700 PP/10 Added dbmjz lookup type.
1702 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1704 PP/12 MAIL args handles TAB as well as SP, for better interop with
1705 non-compliant senders.
1706 Analysis and variant patch by Todd Lyons.
1708 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1709 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1710 Patch from Dirk Mueller <dmueller@suse.com>
1712 PP/13 tls_peerdn now print-escaped for spool files.
1713 Observed some $tls_peerdn in wild which contained \n, which resulted
1714 in spool file corruption.
1716 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1717 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1718 or write after TLS renegotiation, which otherwise led to messages
1721 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1722 as a tracking header (ie: a signed header comes before the signature).
1723 Patch from Wolfgang Breyha.
1725 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1726 comma-sep list; embedded commas doubled.
1728 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1730 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1732 Report and patch from Dmitry Banschikov.
1734 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1735 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1736 failures. We appear to now support TLS1.1+ with Exim.
1738 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1739 lets Exim select keys and certificates based upon TLS SNI from client.
1740 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1741 before an outbound SMTP session. New log_selector, +tls_sni.
1743 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1744 NULL dereference. Report and patch from Alun Jones.
1746 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1747 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1748 Not seeing resolver debug output on NetBSD, but suspect this is a
1749 resolver implementation change.
1751 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1752 Left warnings. Added "eximon gdb" invocation mode.
1754 PP/21 Defaulting "accept_8bitmime" to true, not false.
1756 PP/22 Added -bw for inetd wait mode support.
1758 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1759 locate the relevant includes and libraries. Made this the default.
1761 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1762 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1764 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1765 This may cause build issues on older platforms.
1767 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1768 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1769 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1770 Added SNI support via GnuTLS too.
1771 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1773 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1775 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1776 Applied second patch from Janne, implementing suggestion to default
1777 multiple-strings-in-record handling to match SPF spec.
1779 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1781 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1782 read-only, out of scope).
1783 Patch from Wolfgang Breyha, report from Stuart Northfield.
1785 PP/29 Fix three issues highlighted by clang analyser static analysis.
1786 Only crash-plausible issue would require the Cambridge-specific
1787 iplookup router and a misconfiguration.
1788 Report from Marcin Mirosław.
1790 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1792 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1793 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1794 As part of this, removing so much warning spew let me fix some minor
1795 real issues in debug logging.
1797 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1798 assignment on my part. Fixed.
1800 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1801 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1802 Janne Snabb (who went above and beyond: thank you).
1804 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1805 string otherwise requires a connection and a bunch more work and it's
1806 relatively easy to get wrong. Should also expose TLS library linkage
1809 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1810 64-bit ${eval} (JH/03).
1812 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1813 GNU libc to support some of the 64-bit stuff, should not lead to
1814 conflicts. Defined before os.h is pulled in, so if a given platform
1815 needs to override this, it can.
1817 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1818 protection layer was required, which is not implemented.
1819 Bugzilla 1254, patch from Wolfgang Breyha.
1821 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1822 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1823 tls_dhparam take prime identifiers. Also unbreak combination of
1824 OpenSSL+DH_params+TLSSNI.
1826 PP/39 Disable SSLv2 by default in OpenSSL support.
1832 PP/01 Solaris build fix for Oracle's LDAP libraries.
1833 Bugzilla 1109, patch from Stephen Usher.
1835 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1837 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1840 TF/02 Fix a couple more cases where we did not log the error message
1841 when unlink() failed. See also change 4.74-TF/03.
1843 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1844 lock up or crash if it happened to be inside a call to libc when it
1845 got a SIGUSR1 from exiwhat.
1847 The SIGUSR1 handler appends the current process status to the process
1848 log which is later printed by exiwhat. It used to use the general
1849 purpose logging code to do this, but several functions it calls are
1850 not safe for signals.
1852 The new output code in the SIGUSR1 handler is specific to the process
1853 log, and simple enough that it's easy to inspect for signal safety.
1854 Removing some special cases also simplifies the general logging code.
1855 Removing the spurious timestamps from the process log simplifies
1858 TF/04 Improved ratelimit ACL condition.
1860 The /noupdate option has been deprecated in favour of /readonly which
1861 has clearer semantics. The /leaky, /strict, and /readonly update modes
1862 are mutually exclusive. The update mode is no longer included in the
1863 database key; it just determines when the database is updated. (This
1864 means that when you upgrade Exim will forget old rate measurements.)
1866 Exim now checks that the per_* options are used with an update mode that
1867 makes sense for the current ACL. For example, when Exim is processing a
1868 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1869 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1870 must specify per_mail/readonly. If you omit the update mode it defaults to
1871 /leaky where that makes sense (as before) or /readonly where required.
1873 The /noupdate option is now undocumented but still supported for
1874 backwards compatibility. It is equivalent to /readonly except that in
1875 ACLs where /readonly is required you may specify /leaky/noupdate or
1876 /strict/noupdate which are treated the same as /readonly.
1878 A useful new feature is the /count= option. This is a generalization
1879 of the per_byte option, so that you can measure the throughput of other
1880 aggregate values. For example, the per_byte option is now equivalent
1881 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1883 The per_rcpt option has been generalized using the /count= mechanism
1884 (though it's more complicated than the per_byte equivalence). When it is
1885 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1886 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1887 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1888 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1889 Note that using per_rcpt with a non-readonly update mode in more than
1890 one ACL will cause the recipients to be double-counted. (The per_mail
1891 and per_byte options don't have this problem.)
1893 The handling of very low rates has changed slightly. If the computed rate
1894 is less than the event's count (usually one) then this event is the first
1895 after a long gap. In this case the rate is set to the same as this event's
1896 count, so that the first message of a spam run is counted properly.
1898 The major new feature is a mechanism for counting the rate of unique
1899 events. The new per_addr option counts the number of different
1900 recipients that someone has sent messages to in the last time period. It
1901 behaves like per_rcpt if all the recipient addresses are different, but
1902 duplicate recipient addresses do not increase the measured rate. Like
1903 the /count= option this is a general mechanism, so the per_addr option
1904 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1905 example, measure the rate that a client uses different sender addresses
1906 with the options per_mail/unique=$sender_address. There are further
1907 details in the main documentation.
1909 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1911 TF/06 Removed a few PCRE remnants.
1913 TF/07 Automatically extract Exim's version number from tags in the git
1914 repository when doing development or release builds.
1916 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1917 Bugzilla 879. Patch from Paul Fisher.
1919 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1920 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1923 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1925 PP/05 Variable $av_failed, true if the AV scanner deferred.
1926 Bugzilla 1078. Patch from John Horne.
1928 PP/06 Stop make process more reliably on build failure.
1929 Bugzilla 1087. Patch from Heiko Schlittermann.
1931 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1932 Bugzilla 1089. Patch from Heiko Schlittermann.
1934 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1935 Bugzilla 1131. Patch from Holger Weiß.
1937 PP/09 Handle IPv6 addresses with SPF.
1938 Bugzilla 860. Patch from Wolfgang Breyha.
1940 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1942 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1945 PP/11 match_* no longer expand right-hand-side by default.
1946 New compile-time build option, EXPAND_LISTMATCH_RHS.
1947 New expansion conditions, "inlist", "inlisti".
1949 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1951 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1953 PP/14 fix log_write() format string regression from TF/03.
1954 Bugzilla 1152. Patch from Dmitry Isaikin.
1960 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1962 PP/02 Harmonised TLS library version reporting; only show if debugging.
1963 Layout now matches that introduced for other libraries in 4.74 PP/03.
1965 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1967 PP/04 New "dns_use_edns0" global option.
1969 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1972 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1973 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1975 TK/01 Updated PolarSSL code to 0.14.2.
1976 Bugzilla 1097. Patch from Andreas Metzler.
1978 PP/07 Catch divide-by-zero in ${eval:...}.
1979 Fixes bugzilla 1102.
1981 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1984 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1985 format-string attack -- SECURITY: remote arbitrary code execution.
1987 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1988 time unintentionally subject to list matching rules, letting the header
1989 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1990 arbitrary string expansion). This allowed for information disclosure.
1992 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1993 INT_MIN/-1 -- value coerced to INT_MAX.
1999 NM/01 Workaround for PCRE version dependency in version reporting
2002 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2003 This fixes portability to compilers other than gcc, notably
2004 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2006 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2007 makefiles for portability to HP-UX and POSIX correctness.
2009 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2010 Also via indented variable definition in the Makefile.
2011 (Debugging by Oliver Heesakkers).
2013 PP/02 Restore caching of spamd results with expanded spamd_address.
2014 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2016 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2017 Improves build reliability. Fix from: Frank Elsner
2019 NM/02 Fix wide character breakage in the rfc2047 coding
2020 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2022 NM/03 Allow underscore in dnslist lookups
2023 Fixes bug 1026. Patch from Graeme Fowler
2025 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2026 Code patches from Adam Ciarcinski of NetBSD.
2028 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2031 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2032 is logged, to avoid truncation. Patch from John Horne.
2034 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2035 Patch from Jakob Hirsch.
2037 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2038 SQL string expansion failure details.
2039 Patch from Andrey Oktyabrski.
2041 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2042 Patch from Simon Arlott.
2044 PP/09 New lookups functionality failed to compile on old gcc which rejects
2045 extern declarations in function scope.
2046 Patch from Oliver Fleischmann
2048 PP/10 Use sig_atomic_t for flags set from signal handlers.
2049 Check getgroups() return and improve debugging.
2050 Fixed developed for diagnosis in bug 927 (which turned out to be
2053 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2054 Patch from Mark Zealey.
2056 PP/12 Bugzilla 1056: Improved spamd server selection.
2057 Patch from Mark Zealey.
2059 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2060 Based on patch from Heiko Schlittermann.
2062 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2063 Patch from Uwe Doering, sign-off by Michael Haardt.
2065 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2066 variable declaration deep within a block. Bug and patch from
2069 PP/15 lookups-Makefile IRIX compatibility coercion.
2071 PP/16 Make DISABLE_DKIM build knob functional.
2073 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2074 Patch by Simon Arlott
2076 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2077 variable argument macros. Our copy now differs from upstream.
2083 TF/01 Failure to get a lock on a hints database can have serious
2084 consequences so log it to the panic log.
2086 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2087 controlled using the smtp_confirmation log selector.
2089 TF/03 Include the error message when we fail to unlink a spool file.
2091 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2092 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2093 for maintaining out-of-tree patches for some time.
2095 PP/01 Bugzilla 139: Documentation and portability issues.
2096 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2097 Handle per-OS dynamic-module compilation flags.
2099 PP/02 Let /dev/null have normal permissions.
2100 The 4.73 fixes were a little too stringent and complained about the
2101 permissions on /dev/null. Exempt it from some checks.
2102 Reported by Andreas M. Kirchwitz.
2104 PP/03 Report version information for many libraries, including
2105 Exim version information for dynamically loaded libraries. Created
2106 version.h, now support a version extension string for distributors
2107 who patch heavily. Dynamic module ABI change.
2109 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2110 privilege escalation vulnerability whereby the Exim run-time user
2111 can cause root to append content of the attacker's choosing to
2114 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2117 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2118 If dropping privileges for untrusted macros, we disabled normal logging
2119 on the basis that it would fail; for the Exim run-time user, this is not
2120 the case, and it resulted in successful deliveries going unlogged.
2121 Fixed. Reported by Andreas Metzler.
2127 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2128 only prepend for the Resent-* case. Fixes regression introduced in
2129 Exim 4.70 by NM/22 for Bugzilla 607.
2131 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2132 increasing numbers of administrators be bitten by this.
2134 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2136 PP/03 Bugzilla 994: added openssl_options main configuration option.
2138 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2140 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2142 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2144 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2145 without a peer certificate, leading to a segfault because of an
2146 assumption that peers always have certificates. Be a little more
2147 paranoid. Problem reported by Martin Tscholak.
2149 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2150 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2151 NB: ClamAV planning to remove STREAM in "middle of 2010".
2152 CL also introduces -bmalware, various -d+acl logging additions and
2153 more caution in buffer sizes.
2155 PP/09 Implemented reverse_ip expansion operator.
2157 PP/10 Bugzilla 937: provide a "debug" ACL control.
2159 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2161 PP/12 Bugzilla 973: Implement --version.
2163 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2165 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2167 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2169 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2170 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2171 ignore trailing whitespace.
2173 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2175 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2178 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2179 Notification from Dr Andrew Aitchison.
2181 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2182 ExtendedDetectionInfo response format.
2183 Notification from John Horne.
2185 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2188 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2189 XSL and documented dependency on system catalogs, with examples of how
2192 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2195 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2196 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2197 configuration file which is writeable by the Exim user or group.
2199 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2200 of configuration files to cover files specified with the -C option if
2201 they are going to be used with root privileges, not just the default
2204 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2205 option (effectively making it always true).
2207 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2208 files to be used while preserving root privileges.
2210 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2211 that rogue child processes cannot use them.
2213 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2214 run-time user, instead of root.
2216 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2217 Exim run-time user without dropping privileges.
2219 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2220 result string, instead of calling string_vformat() twice with the same
2223 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2224 for other users. Others should always drop root privileges if they use
2225 -C on the command line, even for a whitelisted configure file.
2227 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2229 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2235 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2236 $data_path, and $header_path variables; fixed documentation bugs and
2239 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2240 exipick to access non-standard spools, including the "frozen" queue
2243 NM/01 Bugzilla 965: Support mysql stored procedures.
2244 Patch from Alain Williams
2246 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2248 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2249 Patch from Andreas Metzler
2251 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2252 Patch from Kirill Miazine
2254 NM/05 Bugzilla 671: Added umask to procmail example.
2256 JJ/03 installed exipick 20100323.0, fixing doc bug
2258 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2259 directory. Notification and patch from Dan Rosenberg.
2261 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2263 TK/02 Improve log output when DKIM signing operation fails.
2265 MH/01 Treat the transport option dkim_domain as a colon separated
2266 list, not as a single string, and sign the message with each element,
2267 omitting multiple occurences of the same signer.
2269 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2270 Bugzilla 985, 986. Patch by Simon Arlott
2272 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2273 Patch by Simon Arlott
2275 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2276 MBX locking. Notification from Dan Rosenberg.
2282 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2284 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2286 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2288 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2290 NM/04 Bugzilla 915: Flag broken perl installation during build.
2296 TK/01 Added patch by Johannes Berg that expands the main option
2297 "spamd_address" if it starts with a dollar sign.
2299 TK/02 Write list of recipients to X-Envelope-Sender header when building
2300 the mbox-format spool file for content scanning (suggested by Jakob
2303 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2304 (http://www.dcc-servers.net/) support via dccifd. Activated by
2305 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2307 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2308 by Mark Daniel Reidel <mr@df.eu>.
2310 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2311 When building exim an external PCRE library is now needed -
2312 PCRE is a system library on the majority of modern systems.
2313 See entry on PCRE_LIBS in EDITME file.
2315 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2316 conversation. Added nologin parameter to request.
2317 Patch contributed by Kirill Miazine.
2319 TF/01 Do not log submission mode rewrites if they do not change the address.
2321 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2323 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2324 log files in place. Contributed by Roberto Lima.
2326 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2328 TF/03 Bugzilla 615: When checking the local_parts router precondition
2329 after a local_part_suffix or local_part_prefix option, Exim now
2330 does not use the address's named list lookup cache, since this
2331 contains cached lookups for the whole local part.
2333 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2334 Robert Millan. Documentation is in experimental-spec.txt.
2336 TF/04 Bugzilla 668: Fix parallel build (make -j).
2338 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2340 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2341 Patch provided by Jan Srzednicki.
2343 TF/05 Leading white space used to be stripped from $spam_report which
2344 wrecked the formatting. Now it is preserved.
2346 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2347 that they are available at delivery time.
2349 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2351 TF/08 TLS error reporting now respects the incoming_interface and
2352 incoming_port log selectors.
2354 TF/09 Produce a more useful error message if an SMTP transport's hosts
2355 setting expands to an empty string.
2357 NM/06 Bugzilla 744: EXPN did not work under TLS.
2358 Patch provided by Phil Pennock.
2360 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2361 Patch provided by Richard Godbee.
2363 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2364 acl_smtp_notquit, added index entry.
2366 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2367 Patch provided by Eugene Bujak.
2369 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2370 accept(). Patch provided by Maxim Dounin.
2372 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2373 Patch provided by Phil Pennock.
2375 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2377 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2378 Patch provided by Brad "anomie" Jorsch.
2380 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2381 Patch provided by Dean Brooks.
2383 TK/05 Add native DKIM support (does not depend on external libraries).
2385 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2386 Patch provided by Graeme Fowler.
2388 NM/16 Bugzilla 851: Documentation example syntax fix.
2390 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2392 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2395 NM/19 Bugzilla 745: TLS version reporting.
2396 Patch provided by Phil Pennock.
2398 NM/20 Bugzilla 167: bool: condition support.
2399 Patch provided by Phil Pennock.
2401 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2402 clients. Patch provided by Phil Pennock.
2404 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2405 Patch provided by Brad "anomie" Jorsch.
2407 NM/23 Bugzilla 687: Fix misparses in eximstats.
2408 Patch provided by Heiko Schlittermann.
2410 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2411 Patch provided by Heiko Schlittermann.
2413 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2414 plus update to original patch.
2416 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2418 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2419 Patch provided by David Brownlee.
2421 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2423 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2425 NM/30 Bugzilla 888: TLS documentation bugfixes.
2427 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2429 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2430 Unlike the original bugzilla I have changed all shell scripts in src tree.
2432 NM/33 Bugzilla 898: Transport filter timeout fix.
2433 Patch by Todd Rinaldo.
2435 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2436 Patch by Serge Demonchaux.
2438 NM/35 Bugzilla 39: Base64 decode bug fixes.
2439 Patch by Jakob Hirsch.
2441 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2443 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2445 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2447 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2453 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2454 ALT-N's libdkim that I have put here:
2455 http://duncanthrax.net/exim-experimental/
2457 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2458 were called 'true' and it seems that C99 defines that as a reserved
2459 keyword to be used with 'bool' variable types. That means you could
2460 not include C99-style headers which use bools without triggering
2461 build errors in sieve.c.
2463 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2464 as mailq or other aliases. Changed the --help handling significantly
2465 to do whats expected. exim_usage() emits usage/help information.
2467 SC/01 Added the -bylocaldomain option to eximstats.
2469 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2471 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2473 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2479 PH/01 Another patch from the Sieve maintainer.
2481 PH/02 When an IPv6 address is converted to a string for single-key lookup
2482 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2483 dots are used instead of colons so that keys in lsearch files need not
2484 contain colons. This was done some time before quoting was made available
2485 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2486 (notated using the quote facility) so as to distinguish them from IPv4
2487 keys. This meant that lookups for IP addresses in host lists did not work
2488 for iplsearch lookups.
2490 This has been fixed by arranging for IPv6 addresses to be expressed with
2491 colons if the lookup type is iplsearch. This is not incompatible, because
2492 previously such lookups could never work.
2494 The situation is now rather anomalous, since one *can* have colons in
2495 ordinary lsearch keys. However, making the change in all cases is
2496 incompatible and would probably break a number of configurations.
2498 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2501 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2502 conversion specification without a maximum field width, thereby enabling
2503 a rogue spamd server to cause a buffer overflow. While nobody in their
2504 right mind would setup Exim to query an untrusted spamd server, an
2505 attacker that gains access to a server running spamd could potentially
2506 exploit this vulnerability to run arbitrary code as the Exim user.
2508 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2509 $primary_hostname instead of what libspf2 thinks the hosts name is.
2511 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2512 a directory entry by the name of the lookup key. Previously, if a
2513 symlink pointed to a non-existing file or a file in a directory that
2514 Exim lacked permissions to read, a lookup for a key matching that
2515 symlink would fail. Now it is enough that a matching directory entry
2516 exists, symlink or not. (Bugzilla 503.)
2518 PH/03 The body_linecount and body_zerocount variables are now exported in the
2521 PH/04 Added the $dnslist_matched variable.
2523 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2524 This means they are set thereafter only if the connection becomes
2527 PH/06 Added the client_condition to authenticators so that some can be skipped
2528 by clients under certain conditions.
2530 PH/07 The error message for a badly-placed control=no_multiline_responses left
2531 "_responses" off the end of the name.
2533 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2535 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2536 (without spaces) instead of just copying the configuration text.
2538 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2540 PH/11 Added $max_received_linelength.
2542 PH/12 Added +ignore_defer and +include_defer to host lists.
2544 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2545 way in which PCRE > 7.0 is built.
2547 PH/14 Implemented queue_only_load_latch.
2549 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2550 MAIL command. The effect was to mangle the value on 64-bit systems.
2552 PH/16 Another patch from the Sieve maintainer.
2554 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2556 PH/18 If a system quota error occurred while trying to create the file for
2557 a maildir delivery, the message "Mailbox is full" was not appended to the
2558 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2559 only to a quota excession during the actual writing of the file.
2561 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2562 characters?) which causes problems in log lines. The DN values are now
2563 passed through string_printing() before being added to log lines.
2565 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2566 and InterBase are left for another time.)
2568 PH/21 Added message_body_newlines option.
2570 PH/22 Guard against possible overflow in moan_check_errorcopy().
2572 PH/23 POSIX allows open() to be a macro; guard against that.
2574 PH/24 If the recipient of an error message contained an @ in the local part
2575 (suitably quoted, of course), incorrect values were put in $domain and
2576 $local_part during the evaluation of errors_copy.
2582 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2583 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2586 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2587 issue a MAIL command.
2589 PH/02 In an ACL statement such as
2591 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2593 if a client was not listed at all, or was listed with a value other than
2594 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2595 the condition was not true (as it should be), so access was not denied.
2596 The bug was that the ! inversion was incorrectly passed on to the second
2597 item. This has been fixed.
2599 PH/03 Added additional dnslists conditions == and =& which are different from
2600 = and & when the dns lookup returns more than one IP address.
2602 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2603 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2605 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2606 FSYNC, which compiles an option called disable_fsync that allows for
2607 bypassing fsync(). The documentation is heavily laced with warnings.
2609 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2611 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2612 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2613 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2614 including adding "make clean"; (3) Added -fPIC when compiling the test
2615 dynamically loaded module, to get rid of a warning.
2617 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2618 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2619 = 0s. The bug is otherwise harmless.
2621 PH/07 There was a bug in the dovecot authenticator such that the value of
2622 $auth1 could be overwritten, and so not correctly preserved, after a
2623 successful authentication. This usually meant that the value preserved by
2624 the server_setid option was incorrect.
2626 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2628 PH/09 Installed PCRE release 7.0.
2630 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2631 run for batched SMTP input. It is now run at the start of every message
2632 in the batch. While fixing this I discovered that the process information
2633 (output by running exiwhat) was not always getting set for -bs and -bS
2634 input. This is fixed, and it now also says "batched" for BSMTP.
2636 PH/11 Added control=no_pipelining.
2638 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2639 patch, slightly modified), and move the expansion of helo_data till after
2640 the connection is made in the smtp transport (so it can use these
2643 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2645 PH/14 Added log_selector = +pid.
2647 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2649 PH/16 Add ${if forany and ${if forall.
2651 PH/17 Added dsn_from option to vary the From: line in DSNs.
2653 PH/18 Flush SMTP output before performing a callout, unless control =
2654 no_callout_flush is set.
2656 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2657 was true (the default) a successful delivery failed to delete the retry
2658 item, thus causing premature timeout of the address. The bug is now
2661 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2663 PH/21 Long custom messages for fakedefer and fakereject are now split up
2664 into multiline responses in the same way that messages for "deny" and
2665 other ACL rejections are.
2667 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2668 with slight modification.
2670 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2671 draft, changing the syntax and factoring some duplicate code".
2673 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2674 for deliveries of the second and subsequent messages over the same SMTP
2677 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2678 ${reduce, with only minor "tidies".
2680 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2682 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2683 expansion side effects.
2685 PH/27 When a message times out after an over-quota error from an Exim-imposed
2686 quota, the bounce message says "mailbox is full". This message was not
2687 being given when it was a system quota that was exceeded. It now should
2690 MH/03 Made $recipients available in local_scan(). local_scan() already has
2691 better access to the recipient list through recipients_list[], but
2692 $recipients can be useful in postmaster-provided expansion strings.
2694 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2695 in the case of a MAIL command with additional options following the
2696 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2697 were accidentally chopped off.
2699 PH/29 SMTP synchronization checks are implemented when a command is read -
2700 there is a check that no more input is waiting when there shouldn't be
2701 any. However, for some commands, a delay in an ACL can mean that it is
2702 some time before the response is written. In this time, more input might
2703 arrive, invalidly. So now there are extra checks after an ACL has run for
2704 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2705 pipelining has not been advertised.
2707 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2709 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2710 returned in the SMTP response when smtp_return_error_details was false.
2711 This has been fixed.
2713 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2714 instead of the C I/O that was originally supplied, because problems were
2715 reported on Solaris.
2717 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2718 Exim which did not show up earlier: it was assuming that a call to
2719 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2720 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2721 was a macro that became an assignment, so it seemed to work. This has
2722 changed to a proper function call with a void return, hence the compile
2723 error. Exim's code has been fixed.
2725 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2728 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2730 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2732 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2733 because it turns out to be too big or there is a timeout) there is no
2734 "Completed" line in the log. When some messages of this type were
2735 selected by exigrep, they were listed as "not completed". Others were
2736 picked up by some special patterns. I have improved the selection
2737 criteria to be more general.
2739 PH/38 The host_find_failed option in the manualroute router can now be set
2740 to "ignore", to completely ignore a host whose IP address cannot be
2741 found. If all hosts are ignored, the behaviour is controlled by the new
2742 host_all_ignored option.
2744 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2745 homing or because of multiple MX records with /mx) generated more than
2746 one IP address, and the following item turned out to be the local host,
2747 all the secondary addresses of the first item were incorrectly removed
2748 from the list, along with the local host and any following hosts (which
2749 is what is supposed to happen).
2751 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2752 whoever called Exim into the -H file. In the case of the daemon it was
2753 behaving confusingly. When first started, it used values for whoever
2754 started the daemon, but after a SIGHUP it used the Exim user (because it
2755 calls itself on a restart). I have changed the code so that it now always
2758 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2759 message are rejected with the same error (e.g. no authentication or bad
2760 sender address), and a DATA command is nevertheless sent (as can happen
2761 with PIPELINING or a stupid MUA), the error message that was given to the
2762 RCPT commands is included in the rejection of the DATA command. This is
2763 intended to be helpful for MUAs that show only the final error to their
2766 PH/42 Another patch from the Sieve maintainer.
2768 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2769 Eximstats - Fixed some broken HTML links and added missing column headers
2771 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2772 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2774 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2776 PH/43 Yet another patch from the Sieve maintainer.
2778 PH/44 I found a way to check for a TCP/IP connection going away before sending
2779 the response to the final '.' that terminates a message, but only in the
2780 case where the client has not sent further data following the '.'
2781 (unfortunately, this is allowed). However, in many cases there won't be
2782 any further data because there won't be any more messages to send. A call
2783 to select() can be used: if it shows that the input is "ready", there is
2784 either input waiting, or the socket has been closed. An attempt to read
2785 the next input character can distinguish the two cases. Previously, Exim
2786 would have sent an OK response which the client would never have see.
2787 This could lead to message repetition. This fix should cure that, at
2788 least in a lot of common cases.
2790 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2791 advertised in response to EHLO.
2797 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2798 fixed by 4.65/MH/01 (is this a record?) are fixed:
2800 (i) An empty string was always treated as zero by the numeric comparison
2801 operators. This behaviour has been restored.
2803 (ii) It is documented that the numeric comparison operators always treat
2804 their arguments as decimal numbers. This was broken in that numbers
2805 starting with 0 were being interpreted as octal.
2807 While fixing these problems I realized that there was another issue that
2808 hadn't been noticed. Values of message_size_limit (both the global option
2809 and the transport option) were treated as octal if they started with 0.
2810 The documentation was vague. These values are now always treated as
2811 decimal, and I will make that clear in the documentation.
2817 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2818 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2821 MH/01 Don't check that the operands of numeric comparison operators are
2822 integers when their expansion is in "skipping" mode (fixes bug
2823 introduced by 4.64-PH/07).
2825 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2826 child addresses, Exim now panics and dies. Previously, because the count
2827 is held in a short int, deliveries were likely to be lost. As such a
2828 large number of recipients for a single message is ridiculous
2829 (performance will be very, very poor), I have chosen to impose a limit
2830 rather than extend the field.
2836 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2837 leftover -K file (the existence of which was triggered by #402).
2838 While we were at it, introduced process PID as part of the -K
2839 filename. This should rule out race conditions when creating
2842 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2843 processing considerably. Previous code took too long for large mails,
2844 triggering a timeout which in turn triggers #401.
2846 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2847 in the DK code in transports.c. sendfile() is not really portable,
2848 hence the _LINUX specificness.
2850 TF/01 In the add_headers option to the mail command in an Exim filter,
2851 there was a bug that Exim would claim a syntax error in any
2852 header after the first one which had an odd number of characters
2855 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2856 callout verification, Exim cached a "reject" for the entire domain. This
2857 is correct for most verifications, but it is not correct for a recipient
2858 verification with use_sender or use_postmaster set, because in that case
2859 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2860 case of MAIL FROM:<> rejection from other early rejections (e.g.
2861 rejection of HELO). When verifying a recipient using a non-null MAIL
2862 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2863 Whatever the result of the callout, the value of the domain cache is
2864 left unchanged (for any other kind of callout, getting as far as trying
2865 RCPT means that the domain itself is ok).
2867 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2870 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2871 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2872 session, the daemon ignores ECONNECT errors and logs others; it now
2873 ignores EPIPE as well.
2875 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2876 (quoted-printable decoding).
2878 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2879 later the small subsequent patch to fix an introduced bug.
2881 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2883 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2885 PH/08 An error is now given if message_size_limit is specified negative.
2887 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2888 to be given (somewhat) arbitrary names.
2890 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2893 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2894 miscellaneous code fixes
2896 PH/10 Added the log_reject_target ACL modifier to specify where to log
2899 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2900 hostname. This is wrong, because it relates to the incoming message (and
2901 probably the interface on which it is arriving) and not to the outgoing
2902 callout (which could be using a different interface). This has been
2903 changed to use the value of the helo_data option from the smtp transport
2904 instead - this is what is used when a message is actually being sent. If
2905 there is no remote transport (possible with a router that sets up host
2906 addresses), $smtp_active_hostname is used.
2908 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2909 tweaks were necessary in order to get it to work (see also 21 below):
2910 (a) The code assumed that strncpy() returns a negative number on buffer
2911 overflow, which isn't the case. Replaced with Exim's string_format()
2913 (b) There were several signed/unsigned issues. I just did the minimum
2914 hacking in of casts. There is scope for a larger refactoring.
2915 (c) The code used strcasecmp() which is not a standard C function.
2916 Replaced with Exim's strcmpic() function.
2917 (d) The code set only $1; it now sets $auth1 as well.
2918 (e) A simple test gave the error "authentication client didn't specify
2919 service in request". It would seem that Dovecot has changed its
2920 interface. Fortunately there's a specification; I followed it and
2921 changed what the client sends and it appears to be working now.
2923 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2926 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2927 address A is aliased to B and C, where B exists and C does not. Without
2928 -v the output is "A verified" because verification stops after a
2929 successful redirection if more than one address is generated. However,
2930 with -v the child addresses are also verified. Exim was outputting "A
2931 failed to verify" and then showing the successful verification for C,
2932 with its parentage. It now outputs "B failed to verify", showing B's
2933 parentage before showing the successful verification of C.
2935 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2936 look up a TXT record in a specific list after matching in a combined
2939 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2940 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2941 they consult the DNS. I had assumed they would set it the way they
2942 wanted; and indeed my experiments on Linux seem to show that in some
2943 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2944 To be on the safe side, however, I have now made the interface to
2945 host_find_byname() similar to host_find_bydns(), with an argument
2946 containing the DNS resolver options. The host_find_byname() function now
2947 sets these options at its start, just as host_find_bydns() does. The smtp
2948 transport options dns_qualify_single and dns_search_parents are passed to
2949 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2950 of host_find_byname() use the default settings of RES_DEFNAMES
2951 (qualify_single) but not RES_DNSRCH (search_parents).
2953 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2954 spool_read_header() do less string testing, by means of a preliminary
2955 switch on the second character of optional "-foo" lines. (This is
2956 overdue, caused by the large number of possibilities that now exist.
2957 Originally there were few.) While I was there, I also converted the
2958 str(n)cmp tests so they don't re-test the leading "-" and the first
2959 character, in the hope this might squeeze out yet more improvement.
2961 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2962 flag allowing group syntax was set by the header_syntax check but not
2963 turned off, possible causing trouble later; (2) The flag was not being
2964 set at all for the header_verify test, causing "group"-style headers to
2965 be rejected. I have now set it in this case, and also caused header_
2966 verify to ignore an empty address taken from a group. While doing this, I
2967 came across some other cases where the code for allowing group syntax
2968 while scanning a header line wasn't quite right (mostly, not resetting
2969 the flag correctly in the right place). These bugs could have caused
2970 trouble for malformed header lines. I hope it is now all correct.
2972 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2973 with the "reply" argument non-NULL. The code, however (which originally
2974 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2975 but it didn't always do it. This confused somebody who was copying the
2976 code for some other use. I have removed all the tests.
2978 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2979 feature that was used to support insecure browsers during the U.S. crypto
2980 embargo. It requires special client support, and Exim is probably the
2981 only MTA that supported it -- and would never use it because real RSA is
2982 always available. This code has been removed, because it had the bad
2983 effect of slowing Exim down by computing (never used) parameters for the
2984 RSA_EXPORT functionality.
2986 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2987 authenticator to fail if there's a tab character in the incoming data
2988 (there should never be unless someone is messing about, as it's supposed
2989 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2990 if the connection is using TLS or if the remote IP is the same as the
2991 local IP, and the "valid-client-cert option" if a client certificate has
2994 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2995 authenticators. This can be used for authorization after authentication
2996 succeeds. (In the case of plaintext, it servers for both authentication
2999 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3000 if any retry times were supplied.
3002 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3003 connection, where there is no client IP address to check. In this
3004 situation, the verify now always succeeds.
3006 PH/25 Applied John Jetmore's -Mset patch.
3008 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3010 PH/27 In a string expansion for a processed (not raw) header when multiple
3011 headers of the same name were present, leading whitespace was being
3012 removed from all of them, but trailing whitespace was being removed only
3013 from the last one. Now trailing whitespace is removed from each header
3014 before concatenation. Completely empty headers in a concatenation (as
3015 before) are ignored.
3017 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3018 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3020 PH/29 [Removed. This was a change that I later backed out, and forgot to
3021 correct the ChangeLog entry (that I had efficiently created) before
3022 committing the later change.]
3024 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3025 address errors (4xx response to RCPT) over the same connection as other
3026 messages routed to the same hosts. Such deliveries are always "forced",
3027 so retry times are not inspected. This resulted in far too many retries
3028 for the affected addresses. The effect occurred only when there were more
3029 hosts than the hosts_max_try setting in the smtp transport when it had
3030 the 4xx errors. Those hosts that it had tried were not added to the list
3031 of hosts for which the message was waiting, so if all were tried, there
3032 was no problem. Two fixes have been applied:
3034 (i) If there are any address or message errors in an SMTP delivery, none
3035 of the hosts (tried or untried) are now added to the list of hosts
3036 for which the message is waiting, so the message should not be a
3037 candidate for sending over the same connection that was used for a
3038 successful delivery of some other message. This seems entirely
3039 reasonable: after all the message is NOT "waiting for some host".
3040 This is so "obvious" that I'm not sure why it wasn't done
3041 previously. Hope I haven't missed anything, but it can't do any
3042 harm, as the worst effect is to miss an optimization.
3044 (ii) If, despite (i), such a delivery is accidentally attempted, the
3045 routing retry time is respected, so at least it doesn't keep
3046 hammering the server.
3048 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3049 in ${readsocket because some servers need this prod.
3051 PH/32 Added some extra debug output when updating a wait-xxx database.
3053 PH/33 The hint "could be header name not terminated by colon", which has been
3054 given for certain expansion errors for a long time, was not being given
3055 for the ${if def:h_colon_omitted{... case.
3057 PH/34 The spec says: "With one important exception, whenever a domain list is
3058 being scanned, $domain contains the subject domain." There was at least
3059 one case where this was not true.
3061 PH/35 The error "getsockname() failed: connection reset by peer" was being
3062 written to the panic log as well as the main log, but it isn't really
3063 panic-worthy as it just means the connection died rather early on. I have
3064 removed the panic log writing for the ECONNRESET error when getsockname()
3067 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3068 runs only) independently of the message's sender address. This meant
3069 that, if the 4xx error was in fact related to the sender, a different
3070 message to the same recipient with a different sender could confuse
3071 things. In particular, this can happen when sending to a greylisting
3072 server, but other circumstances could also provoke similar problems.
3073 I have changed the default so that the retry time for these errors is now
3074 based a combination of the sender and recipient addresses. This change
3075 can be overridden by setting address_retry_include_sender=false in the
3078 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3079 remote server are returned as part of bounce messages. This was not
3080 happening for LMTP over a pipe (the lmtp transport), but now it is the
3081 same for both kinds of LMTP.
3083 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3084 in header lines that were in fact CNAMEs. This is no longer the case.
3086 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3087 and queue runs started by the daemon processed all messages. This has
3088 been fixed so that -R and -S can now usefully be given with -q<time>.
3090 PH/40 Import PCRE release 6.7 (fixes some bugs).
3092 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3094 PH/42 Give an error if -q is specified more than once.
3096 PH/43 Renamed the variables $interface_address and $interface_port as
3097 $received_ip_address and $received_port, to make it clear that these
3098 values apply to message reception, and not to the outgoing interface when
3099 a message is delivered. (The old names remain recognized, of course.)
3101 PH/44 There was no timeout on the connect() call when using a Unix domain
3102 socket in the ${readsocket expansion. There now is.
3104 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3105 be meaningful with "accept".
3107 SC/01 Eximstats V1.43
3108 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3110 SC/02 Eximstats V1.44
3111 Use a glob alias rather than an array ref in the generated
3112 parser. This improves both readability and performance.
3114 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3115 Collect SpamAssassin and rejection statistics.
3116 Don't display local sender or destination tables unless
3117 there is data to show.
3118 Added average volumes into the top table text output.
3120 SC/04 Eximstats V1.46
3121 Collect data on the number of addresses (recipients)
3122 as well as the number of messages.
3124 SC/05 Eximstats V1.47
3125 Added 'Message too big' to the list of mail rejection
3126 reasons (thanks to Marco Gaiarin).
3128 SC/06 Eximstats V1.48
3129 Mainlog lines which have GMT offsets and are too short to
3130 have a flag are now skipped.
3132 SC/07 Eximstats V1.49 (Alain Williams)
3133 Added the -emptyok flag.
3135 SC/08 Eximstats V1.50
3136 Fixes for obtaining the IP address from reject messages.
3138 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3139 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3140 whitespace changes from 4.64-PH/27
3142 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3145 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3146 are found, allow negative numbers in numeric criteria)
3148 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3150 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3151 to match changes made in 4.64-PH/43
3153 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3155 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3156 "domain" is actually an IP address, and force a failure. This locks out
3157 those revolvers/nameservers that support "A-for-A" lookups, in
3158 contravention of the specifications.
3160 PH/48 When a host name was looked up from an IP address, and the subsequent
3161 forward lookup of the name timed out, the host name was left in
3162 $sender_host_name, contrary to the specification.
3164 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3165 restricted to single-key lookups, Exim was not diagnosing an error if
3166 * or *@ was used with a query-style lookup.
3168 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3170 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3171 long ago, but noone interested enough thought of it. Let's just say that
3172 the "1.1" means that there are some new functions that weren't there at
3173 some point in the past.
3175 PH/51 Error processing for expansion failure of helo_data from an smtp
3176 transport during callout processing was broken.
3178 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3179 tested/used via the -bh/-bhc/-bs options.
3181 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3182 bug, fixed in subsequent PCRE releases).
3184 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3185 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3187 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3193 SC/01 Use a glob alias rather than an array ref in eximstats generated
3194 parser. This improves both readability and performance.
3196 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3197 Don't display local sender or destination tables in eximstats unless
3198 there is data to show.
3199 Added average volumes into the eximstats top table text output.
3201 SC/03 Collect data on the number of addresses (recipients) as well
3202 as the number of messages in eximstats.
3204 TF/01 Correct an error in the documentation for the redirect router. Exim
3205 does (usually) call initgroups() when daemonizing.
3207 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3208 with consistent privilege compared to when running as a daemon.
3210 TF/03 Note in the spec that $authenticated_id is not set for local
3211 submissions from trusted users.
3213 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3214 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3216 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3217 by adding some example configuration directives to the default
3218 configuration file. A little bit of work is required to uncomment the
3219 directives and define how usernames and passwords are checked, but
3220 there is now a framework to start from.
3222 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3223 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3224 without this. I don't know how relevant this is to other LDAP libraries.
3226 PH/02 Add the verb name to the "unknown ACL verb" error.
3228 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3230 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3232 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3233 directory not expanded when it should be if an expanded home directory
3234 was set for the address (which is overridden by the transport).
3236 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3239 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3240 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3241 because it is too late at that time, and has no effect.
3243 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3244 security issue with \' (bugzilla #107). I could not use the
3245 PQescapeStringConn() function, because it needs a PGconn value as one of
3248 PH/08 When testing addresses using -bt, indicate those final addresses that
3249 are duplicates that would not cause an additional delivery. At least one
3250 person was confused, thinking that -bt output corresponded to deliveries.
3251 (Suppressing duplicates isn't a good idea as you lose the information
3252 about possibly different redirections that led to the duplicates.)
3254 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3255 systems where poll() doesn't work, in particular OS X.
3257 PH/10 Added more information to debugging output for retry time not reached.
3259 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3260 operations in malware.c.
3262 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3265 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3266 syslog_duplication set false, log lines that would normally be written
3267 both the the main log and to the reject log were not written to syslog at
3270 PH/14 In the default configuration, change the use of "message" in ACL warn
3271 statements to "add_header".
3273 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3274 not followed by a command (e.g. "seen endif").
3276 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3277 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3280 PH/17 Added extra conditions to the default value of delay_warning_condition
3284 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3285 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3286 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3289 The Auto-Submitted: and various List- headers are standardised, whereas I
3290 don't think Precedence: ever was.
3292 PH/18 Refactored debugging code in route_finduser() to show more information,
3293 in particular, the error code if getpwnam() issues one.
3295 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3296 This is apparently needed in addition to the PH/07 change above to avoid
3297 any possible encoding problems.
3299 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3300 but not after initializing Perl.
3302 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3303 output them only if debugging. By default they are written stderr,
3304 apparently, which is not desirable.
3306 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3309 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3312 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3314 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3315 authenticated or an ident call has been made. Suppress the default
3316 values for $authenticated_id and $authenticated_sender (but permit -oMai
3317 and -oMas) when testing with -bh.
3319 PH/24 Re-jigged the order of the tests in the default configuration so that the
3320 tests for valid domains and recipients precede the DNS black list and CSA
3321 tests, on the grounds that those ones are more expensive.
3323 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3324 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3325 This bug exists in every version of Exim that I still have, right back to
3328 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3329 However, an attempt to turn on case-sensitivity in a regex key by
3330 including (?-i) didn't work because the subject string was already
3331 lowercased, and the effects were non-intuitive. It turns out that a
3332 one-line patch can be used to allow (?-i) to work as expected.
3338 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3339 other effects) broke the use of negated acl sub-conditions.
3341 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3344 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3345 "Deny" causes Exim to reject the incoming connection with a 554 error.
3346 Unfortunately, if there is a major crisis, such as a disk failure,
3347 tcp-wrappers gives "deny", whereas what one would like would be some
3348 kind of temporary error. A kludge has been added to help with this.
3349 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3350 554 error is used if errno is still zero or contains ENOENT (which occurs
3351 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3354 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3356 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3357 errors. Otherwise a message that provokes a temporary error (when other
3358 messages do not) can cause a whole host to time out.
3360 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3361 addresses were routed directly to files or pipes from a redirect router.
3362 File deliveries just didn't batch; pipe deliveries might have suffered
3365 PH/06 A failure to get a lock for a hints database would erroneously always say
3366 "Failed to get write lock", even when it was really a read lock.
3368 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3369 of 0600. This has been changed to use the value of the lockfile_mode
3370 option (which defaults to 0600).
3372 PH/08 Applied small patch from the Sieve maintainer.
3374 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3375 folder from quota calculations, a direct delivery into this folder messed
3376 up the contents of the maildirsize file. This was because the regex was
3377 used only to exclude .Trash (or whatever) when the size of the mailbox
3378 was calculated. There was no check that a delivery was happening into an
3379 excluded directory. This bug has been fixed by ignoring all quota
3380 processing for deliveries into excluded directories.
3382 PH/10 Added the maildirfolder_create_regex option to appendfile.
3388 PH/01 The code for finding all the local interface addresses on a FreeBSD
3389 system running IPv6 was broken. This may well have applied to all BSD
3390 systems, as well as to others that have similar system calls. The broken
3391 code found IPv4 interfaces correctly, but gave incorrect values for the
3392 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3393 that it would not match correctly against @[] and not recognize the IPv6
3396 PH/02 The ipliteral router was not recognizing addresses of the form user@
3397 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3399 PH/03 Added disable_ipv6.
3401 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3402 decoded form, because it is most often used to construct To: headers
3403 lines in autoreplies, and the decoded form may well be syntactically
3404 invalid. However, $reply_address has leading white space removed, and all
3405 newlines turned into spaces so that the autoreply transport does not
3408 PH/05 If group was specified without a user on a router, and no group or user
3409 was specified on a transport, the group from the router was ignored.
3411 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3412 for visible compile-time settings that can be used to change these
3413 numbers, for those that want even more. Backwards compatibility with old
3414 spool files has been maintained. However, going back to a previous Exim
3415 release will lost any variables that are in spool files.
3417 PH/07 Two small changes when running in the test harness: increase delay when
3418 passing a TCP/IP connection to a new process, in case the original
3419 process has to generate a bounce, and remove special handling of
3420 127.0.0.2 (sic), which is no longer necessary.
3422 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3423 be the same on different OS.
3425 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3428 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3429 whether --show-vars was specified or not
3431 JJ/02 exipick: Added support for new ACL variable spool format introduced
3434 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3435 syntactically invalid From: or Reply-to: line, and a filter used this to
3436 generate an autoreply, and therefore failed to obtain an address for the
3437 autoreply, Exim could try to deliver to a non-existent relative file
3438 name, causing unrelated and misleading errors. What now happens is that
3439 it logs this as a hard delivery error, but does not attempt to create a
3442 PH/11 The exinext utility has a -C option for testing purposes, but although
3443 the given file was scanned by exinext itself; it wasn't being passed on
3444 when Exim was called.
3446 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3447 an end-of-file indication when reading a command response.
3449 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3450 compiled. In many other places in Exim, IPv6 addresses are always
3451 recognized, so I have changed this. It also means that IPv4 domain
3452 literals of the form [IPV4:n.n.n.n] are now always recognized.
3454 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3455 used if the router is not running as root, for example, when verifying at
3456 ACL time, or when using -bh. The debugging output from this situation was
3457 non-existent - all you got was a failure to exec. I have made two
3460 (a) Failures to set uid/gid, the current directory, or a process leader
3461 in a subprocess such as that created by queryprogram now generate
3462 suitable debugging output when -d is set.
3464 (b) The queryprogram router detects when it is not running as root,
3465 outputs suitable debugging information if -d is set, and then runs
3466 the subprocess without attempting to change uid/gid.
3468 PH/15 Minor change to Makefile for building test_host (undocumented testing
3471 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3472 additional section of a DNS packet that returns MX or SRV records.
3473 Instead, it always explicitly searches for A/AAAA records. This avoids
3474 major problems that occur when a DNS server includes only records of one
3475 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3476 fixed another bug: if SRV records were looked up and the corresponding
3477 address records were *not* found in the additional section, the port
3478 values from the SRV records were lost.
3480 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3481 using the correct key (the original address) when searching the retry
3482 rules in order to find which one to use for generating the retry hint.
3484 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3485 adding the default one. Similarly, if it contains a Reply-To: header, the
3486 errors_reply_to option, if set, is not used.
3488 PH/19 When calculating a retry time, Exim used to measure the "time since
3489 failure" by looking at the "first failed" field in the retry record. Now
3490 it does not use this if it is later than than the arrival time of the
3491 message. Instead it uses the arrival time. This makes for better
3492 behaviour in cases where some deliveries succeed, thus re-setting the
3493 "first failed" field. An example is a quota failure for a huge message
3494 when small messages continue to be delivered. Without this change, the
3495 "time since failure" will always be short, possible causing more frequent
3496 delivery attempts for the huge message than are intended.
3497 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3499 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3500 $1, $2, $3) because the numerical variables can be reset during some
3501 expansion items (e.g. "match"), thereby losing the authentication data.
3503 PH/21 Make -bV show the size of off_t variables so that the test suite can
3504 decide whether to run tests for quotas > 2G.
3506 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3507 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3508 filecount value is greater than 2G or if a quota value is greater than 2G
3509 on a system where the size of off_t is not greater than 4, a panic error
3512 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3513 never match. The debug and -bh output now contains an explicit error
3514 message indicating a malformed IPv4 address or mask.
3516 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3517 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3518 PH/23 above applies.
3520 PH/25 Do not write to syslog when running in the test harness. The only
3521 occasion when this arises is a failure to open the main or panic logs
3522 (for which there is an explicit test).
3524 PH/26 Added the /no_tell option to "control=freeze".
3526 PH/27 If a host name lookup failed very early in a connection, for example, if
3527 the IP address matched host_lookup and the reverse lookup yielded a name
3528 that did not have a forward lookup, an error message of the form "no IP
3529 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3530 could be logged. Now it outputs the IP address instead of "NULL".
3532 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3533 allows the sender and the authenticated sender to be set when
3534 submitting a message from within Exim. Since child_open_exim() is
3535 documented for local_scan(), the new function should be too.
3537 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3538 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3539 results in an empty string is now treated as unset.
3541 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3543 PH/31 Added sender_verify_fail logging option.
3545 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3546 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3547 tidied the source and removed it altogether.
3549 PH/33 When a queue run was abandoned because the load average was too high, a
3550 log line was always written; now it is written only if the queue_run log
3551 selector is set. In addition, the log line for abandonment now contains
3552 information about the queue run such as the pid. This is always present
3553 in "start" and "stop" lines but was omitted from the "abandon" line.
3555 PH/34 Omit spaces between a header name and the colon in the error message that
3556 is given when verify = headers_syntax fails (if there are lots of them,
3557 the message gets confusing).
3559 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3560 names, as there are now some PTR records that contain slashes. This check
3561 is only to protect against broken name servers that fall over on strange
3562 characters, so the fact that it applies to all lookups doesn't matter.
3564 PH/36 Now that the new test suite is complete, we can remove some of the
3565 special code in Exim that was needed for the old test suite. For example,
3566 sorting DNS records because real resolvers return them in an arbitrary
3567 order. The new test suite's fake resolver always returns records in the
3570 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3571 bounces) except when queue_only is set, to avoid logging races between
3572 the different processes.
3574 PH/38 Panic-die if .include specifies a non-absolute path.
3576 PH/39 A tweak to the "H" retry rule from its user.
3578 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3579 a label. They prevented compilation on older perls.
3581 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3582 a warning to be raised on newish perls.
3584 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3585 on queue. Changes to match documented behaviour of showing count of
3586 messages matching specified criteria.
3588 PH/40 Changed the default ident timeout from 30s to 5s.
3590 PH/41 Added support for the use of login_cap features, on those BSD systems
3591 that have them, for controlling the resources used by pipe deliveries.
3593 PH/42 The content-scanning code uses fopen() to create files in which to put
3594 message data. Previously it was not paying any attention to the mode of
3595 the files. Exim runs with umask(0) because the rest of the code creates
3596 files with open(), and sets the required mode explicitly. Thus, these
3597 files were ending up world-writeable. This was not a big issue, because,
3598 being within the spool directory, they were not world-accessible. I have
3599 created a function called modefopen, which takes an additional mode
3600 argument. It sets umask(777), creates the file, chmods it to the required
3601 mode, then resets the umask. All the relevant calls to fopen() in the
3602 content scanning code have been changed to use this function.
3604 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3605 to 24 hours. This avoids potential overflow problems when processing G
3606 and H retry rules. I suspect nobody ever tinkers with this value.
3608 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3610 PH/45 When the plaintext authenticator is running as a client, the server's
3611 challenges are checked to ensure they are valid base64 strings. By
3612 default, the authentication attempt is cancelled if an invalid string is
3613 received. Setting client_ignore_invalid_base64 true ignores these errors.
3614 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3615 they are received. Thus, the responses can be made to depend on the
3616 challenges. If an invalid string is ignored, an empty string is placed in
3619 PH/46 Messages that are created by the autoreply transport now contains a
3620 References: header, in accordance with RFCs 2822 and 3834.
3622 PH/47 Added authenticated_sender_force to the smtp transport.
3624 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3626 PH/49 Installed latest patch from the Sieve maintainer.
3628 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3629 was also set, the appendfile transport was unnecessarily scanning a
3630 directory of message files (e.g. for maildir delivery) to find the count
3631 of files (along with the size), even though it did not need this
3632 information. It now does the scan only if it needs to find either the
3633 size of the count of files.
3635 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3637 PH/52 Two bugs concerned with error handling when the smtp transport is
3640 (i) Exim was not creating retry information for temporary errors given
3641 for individual recipients after the DATA command when the smtp transport
3642 was used in LMTP mode. This meant that they could be retried too
3643 frequently, and not timed out correctly.
3645 (ii) Exim was setting the flag that allows error details to be returned
3646 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3647 recipients that were returned after the DATA command.
3649 PH/53 This is related to PH/52, but is more general: for any failing address,
3650 when detailed error information was permitted to be returned to the
3651 sender, but the error was temporary, then after the final timeout, only
3652 "retry timeout exceeded" was returned. Now it returns the full error as
3653 well as "retry timeout exceeded".
3655 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3656 do this, and (what is worse) MTAs that accept it.
3658 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3659 will now be deprecated.
3661 PH/56 New os.c-cygwin from the Cygwin maintainer.
3663 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3664 formats (previously only available in exim formats via -bpr, -bpru,
3665 and -bpra. Now also available in native and exiqgrep formats)
3667 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3668 with very large, slow to parse queues
3670 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3672 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3674 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3675 responses to authentication challenges, though it was showing the
3676 challenges; (ii) I've removed the CR characters from the debug output for
3679 PH/58 Allow for the insertion of a newline as well as a space when a string
3680 is turned into more than one encoded-word during RFC 2047 encoding. The
3681 Sieve code now uses this.
3683 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3684 data_4xx, lost_connection, tls_required.
3686 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3687 message was being sent as an SMTP response.
3689 PH/61 Add -l and -k options to exicyclog.
3691 PH/62 When verifying, if an address was redirected to one new address, so that
3692 verification continued, and the new address failed or deferred after
3693 having set something in $address_data, the value of $address_data was not
3694 passed back to the ACL. This was different to the case when no
3695 redirection occurred. The value is now passed back in both cases.
3697 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3698 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3699 use login_cap.h, so on its own it isn't the distinguishing feature. The
3700 new name refers directly to the setclassresources() function.
3702 PH/65 Added configuration files for NetBSD3.
3704 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3706 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3707 is preferred over IPv4.
3709 PH/68 The bounce_return_message and bounce_return_body options were not being
3710 honoured for bounces generated during the reception of non-SMTP messages.
3711 In particular, this applied to messages rejected by the ACL. This bug has
3712 been fixed. However, if bounce_return_message is true and bounce_return_
3713 body is false, the headers that are returned for a non-SMTP message
3714 include only those that have been read before the error was detected.
3715 (In the case of an ACL rejection, they have all been read.)
3717 PH/69 The HTML version of the specification is now built in a directory called
3718 spec_html instead of spec.html, because the latter looks like a path with
3719 a MIME-type, and this confuses some software.
3721 PH/70 Catch two compiler warnings in sieve.c.
3723 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3724 function verify_get_ident() calls ip_connect() to connect a socket, but
3725 if the "connect()" function timed out, ip_connect() used to close the
3726 socket. However, verify_get_ident() also closes the socket later, and in
3727 between Exim writes to the log, which may get opened at this point. When
3728 the socket was closed in ip_connect(), the log could get the same file
3729 descriptor number as the socket. This naturally causes chaos. The fix is
3730 not to close the socket in ip_connect(); the socket should be closed by
3731 the function that creates it. There was only one place in the code where
3732 this was missing, in the iplookup router, which I don't think anybody now
3733 uses, but I've fixed it anyway.
3735 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3736 well as to direct DNS lookups. Otherwise the handling of names in host
3737 lists is inconsistent and therefore confusing.
3743 PH/01 Two changes to the default runtime configuration:
3745 (1) Move the checks for relay_from_hosts and authenticated clients from
3746 after to before the (commented out) DNS black list checks.
3748 (2) Add control=submission to the relay_from_hosts and authenticated
3749 clients checks, on the grounds that messages accepted by these
3750 statements are most likely to be submissions.
3752 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3754 (1) Generate an error if the third argument for the ${prvs expansion is
3757 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3760 (3) Reset the variables that are obtained from the first argument of
3761 ${prvscheck and used in the second argument before leaving the code,
3762 because their memory is reclaimed, so using them afterwards may do
3765 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3766 one (it's much easier than Tom thought :-).
3768 (5) Because of (4), we can now allow for the use of $prvscheck_result
3769 inside the third argument.
3771 PH/03 For some reason, the default setting of PATH when running a command from
3772 a pipe transport was just "/usr/bin". I have changed it to
3775 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3776 anything to be listed in the output from -bV.
3778 PH/05 When a filter generated an autoreply, the entire To: header line was
3779 quoted in the delivery log line, like this:
3781 => >A.N.Other <ano@some.domain> <original@ddress> ...
3783 This has been changed so that it extracts the operative address. There
3784 may be more than one such address. If so, they are comma-separated, like
3787 => >ano@some.domain,ona@other.domain <original@ddress> ...
3789 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3790 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3791 not being looked up in the rDNS to get a host name, Exim was showing the
3792 IP address twice in Received: lines, even though the IP addresses were
3793 identical. For example:
3795 Received: from [1.2.3.4] (helo=[1.2.3.4])
3797 However, if the real host name was known, it was omitting the HELO data
3798 if it matched the actual IP address. This has been tidied up so that it
3799 doesn't show the same IP address twice.
3801 PH/07 When both +timestamp and +memory debugging was on, the value given by
3802 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3803 called by the debug printing, thereby overwriting the timestamp buffer.
3804 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3806 PH/08 When the original message was included in an autoreply transport, it
3807 always said "this is a copy of the message, including all the headers",
3808 even if body_only or headers_only was set. It now gives an appropriate
3811 PH/09 Applied a patch from the Sieve maintainer which:
3813 o fixes some comments
3814 o adds the (disabled) notify extension core
3815 o adds some debug output for the result of if/elsif tests
3816 o points to the current vacation draft in the documentation
3817 and documents the missing references header update
3821 o fixes a bug in processing the envelope test (when testing
3822 multiple envelope elements, the last element determined the
3825 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3826 Electronic Mail") by including:
3828 Auto-submitted: auto-generated
3830 in the messages that it generates (bounce messages and others, such as
3831 warnings). In the case of bounce messages for non-SMTP messages, there was
3832 also a typo: it was using "Auto_submitted" (underscore instead of
3833 hyphen). Since every message generated by Exim is necessarily in response
3834 to another message, thes have all been changed to:
3836 Auto-Submitted: auto-replied
3838 in accordance with these statements in the RFC:
3840 The auto-replied keyword:
3842 - SHOULD be used on messages sent in direct response to another
3843 message by an automatic process,
3845 - MUST NOT be used on manually-generated messages,
3847 - MAY be used on Delivery Status Notifications (DSNs) and Message
3848 Disposition Notifications (MDNs),
3850 - MUST NOT be used on messages generated by automatic or periodic
3851 processes, except for messages which are automatic responses to
3854 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3855 to the default Received: header definition.
3857 PH/12 Added log selector acl_warn_skipped (default on).
3859 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3860 variables because (a) they are in the wrong storage pool and (b) even if
3861 they were copied, it wouldn't work properly because of the caching.
3863 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3864 checking when decoding. Apparently there are clients that generate
3865 overlong encoded strings. Why am I not surprised?
3867 PH/15 If the first argument of "${if match_address" was not empty, but did not
3868 contain an "@" character, Exim crashed. Now it writes a panic log message
3869 and treats the condition as false.
3871 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3873 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3874 extension "envelope-auth". The code is finished and in agreement with
3875 other implementations, but there is no documentation so far and in fact,
3876 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3877 not changing the active code.
3879 Print executed "if" and "elsif" statements when debugging is used. This
3880 helps a great deal to understand what a filter does.
3882 Document more things not specified clearly in RFC3028. I had all this
3883 sorted out, when out of a sudden new issues came to my mind. Oops."
3885 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3888 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3889 canonical form (as documented). However, after a host name lookup from
3890 the IP address, check_host() was doing a simple string comparison with
3891 addresses acquired from the DNS when checking that the found name did
3892 have the original IP as one of its addresses. Since any found IPv6
3893 addresses are likely to be in abbreviated form, the comparison could
3894 fail. Luckily, there already exists a function for doing the comparison
3895 by converting both addresses to binary, so now that is used instead of
3896 the text comparison.
3898 PH/20 There was another similar case to PH/19, when a complete host name was
3899 given in a host list; looking up its IP address could give an abbreviated
3900 form, whereas the current host's name might or might not be abbreviated.
3901 The same fix has been applied.
3907 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3908 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3911 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3912 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3914 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3916 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3917 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3918 Also, for "Auto-Submitted", treat anything other than "no" as
3919 non-personal, in accordance with RFC 3834. (Previously it treated
3920 anything starting "auto-" as non-personal.)
3922 TF/01 The control=submission/name=... option had a problem with syntax
3923 errors if the name included a slash character. The /name= option
3924 now slurps the rest of the string, so it can include any characters
3925 but it must come last in the list of options (after /sender_retain
3928 PH/05 Some modifications to the interface to the fake nameserver for the new
3936 TK/01 Added the "success_on_redirect" address verification option. See
3937 NewStuff for rationale and an example.
3939 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3941 PH/02 Patch to exigrep to allow it to work on syslog lines.
3943 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3944 fread() to skip over the body file's header line, because in Cygwin the
3945 header line is locked and is inaccessible.
3947 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3948 co-exist for some time) to make it clear that it is the Exim ID that is
3949 referenced, not the Message-ID: header line.
3951 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3952 string_format() function, because snprintf() does not exist on all
3955 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3956 ${stat: expansion item.
3958 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3959 protocol synchronization error", to keep the pedants happy.
3961 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3962 well as for IRIX systems, when gcc is being used. See the host.c source
3965 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3967 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3970 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3971 transport and to the smtp transport in LMTP mode.
3973 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3975 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3976 run a filter in a subprocess. This could lead to confusion in subsequent
3977 lookups in the parent process. There should also be a search_tidyup() at
3978 the end of the subprocess.
3980 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3981 only if the host matched helo_try_verify_hosts, which caused the
3982 verification to occur when the EHLO/HELO command was issued. The ACL just
3983 tested the remembered result. Now, if a previous verification attempt has
3984 not happened, "verify = helo" does it there and then.
3986 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3988 TK/03 Fix log output including CR from clamd.
3990 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3991 exist provoked a memory error which could cause a segfault.
3993 PH/15 Installed PCRE 6.2
3995 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3997 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3998 of the problem. Specifically, suggested +O2 rather than +O1 for the
4001 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4003 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4004 record, the port was not correctly logged when the outgoing_port log
4005 selector was set (it logged the transort's default port).
4007 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4008 fallback_hosts, and "hosts" in the smtp transport.
4010 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4011 host errors such as "Connection refused".
4013 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4014 authentication with radiusclient 0.4.9:
4016 - Error returned from rc_read_config was caught wrongly
4017 - Username/password not passed on to radius server due to wrong length.
4019 The presumption is that some radiusclient API changes for 4.51/PH/17
4020 were not taken care of correctly. The code is still untested by me (my
4021 Linux distribution still has 0.3.2 of radiusclient), but it was
4022 contributed by a Radius user.
4024 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4025 expanding the "port" option of the smtp transport.
4027 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4028 while reading a MIME header. Thanks to Tom Hughes for a patch.
4030 PH/24 Include config.h inside local_scan.h so that configuration settings are
4033 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4034 that in an ACL for RCPT (for example), you can examine exactly what was
4037 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4038 commands, but it was not correctly comparing the address with the actual
4039 client host address. Thus, it would show the EHLO address in Received:
4040 header lines when this was not necessary.
4042 PH/27 Added the % operator to ${eval:}.
4044 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4045 it should be ignoring failures (because with -C, for example, it has lost
4046 privilege). It wasn't ignoring creation failures other than "already
4049 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4052 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4053 because an input line was too long, either on its own, or by virtue of
4054 too many continuations, the temporary file was not being removed, and the
4055 return code was incorrect.
4057 PH/31 Missing "BOOL" in function definition in filtertest.c.
4059 PH/32 Applied Sieve patches from the maintainer.
4061 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4063 PH/33 Added "verify = not_blind".
4065 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4066 Local/Makefile (with some defaults set). These are used in built scripts
4067 such as exicyclog, but they have never been used in the exim_install
4068 script (though there are many overriding facilities there). I have
4069 arranged that the exim_install script now takes note of these two
4072 PH/35 Installed configuration files for Dragonfly.
4074 PH/36 When a locally submitted message by a trusted user did not contain a
4075 From: header, and the sender address was obtained from -f or from an SMTP
4076 MAIL command, and the trusted user did not use -F to supply a sender
4077 name, $originator_name was incorrectly used when constructing a From:
4078 header. Furthermore, $originator_name was used for submission mode
4079 messages from external hosts without From: headers in a similar way,
4080 which is clearly wrong.
4082 PH/37 Added control=suppress_local_fixups.
4084 PH/38 When log_selector = +received_sender was set, and the addition of the
4085 sender made the log line's construction buffer exactly full, or one byte
4086 less than full, an overflow happened when the terminating "\n" was
4089 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4090 when the result of a list match is failure because a DNS lookup failed.
4092 PH/40 RM_COMMAND is now used in the building process.
4094 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4095 the "build-* directories that it finds.
4097 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4098 address in a domain literal was a prefix of an interface address.
4100 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4101 when verifying a sender address, unless rewrite_headers is false.
4103 PH/44 Wrote a long comment about why errors_to addresses are verified as
4104 recipients, not senders.
4106 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4107 the ratelimit ACL was added.
4109 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4111 PH/46 Added extra information about PostgreSQL errors to the error string.
4113 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4114 avoiding the need to install special zones in a real server. This is
4115 backwards compatible; if it can't find the fake resolver, it drops back.
4116 Thus, both old and new test suites can be run.
4118 TF/02 Added util/ratelimit.pl
4120 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4121 clock is set back in time.
4123 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4124 Candler <B.Candler@pobox.com>.
4126 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4127 OK for addresses that are the result of redirections.
4129 PH/48 A number of further additions for the benefit of the new test suite,
4130 including a fake gethostbyname() that interfaces to the fake DNS resolver
4133 TF/06 The fix for widen_domains has also been applied to qualify_single and
4134 search_parents which are the other dnslookup options that can cause
4137 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4140 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4142 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4143 service" if it encountered an MX record with an empty target hostname.
4144 The message is now "an MX or SRV record indicated no SMTP service".
4146 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4147 if the DNS of the sending site is misconfigured. This is quite a
4148 common situation. This change restores the behaviour of treating a
4149 helo verification defer as a failure.
4151 PH/51 If self=fail was set on a router, the bounce message did not include the
4152 actual error message.
4158 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4160 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4161 command itself ended in error, the underlying message about the transport
4162 filter timeout was being overwritten with the pipe command error. Now the
4163 underlying error message should be appended to the second error message.
4165 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4167 PH/02 Reduce the amount of output that "make" produces by default. Full output
4168 can still be requested.
4170 PH/03 The warning log line about a condition test deferring for a "warn" verb
4171 was being output only once per connection, rather than after each
4172 occurrence (because it was using the same function as for successful
4173 "warn" verbs). This seems wrong, so I have changed it.
4175 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4176 it should not have, which might have caused a crash in the right
4177 circumstances, but probably never did.
4179 PH/04 Installed a modified version of Tony Finch's patch to make submission
4180 mode fix the return path as well as the Sender: header line, and to
4181 add a /name= option so that you can make the user's friendly name appear
4184 TF/03 Added the control = fakedefer ACL modifier.
4186 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4187 Mark Lowes for thorough testing.
4189 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4191 TK/03 Merged latest SRS patch from Miles Wilton.
4193 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4194 with the definition in sysexits.h (which is #included earlier).
4195 Fortunately, Exim does not actually use EX_OK. The code used to try to
4196 preserve the sysexits.h value, by assuming that macro definitions were
4197 scanned for macro replacements. I have been disabused of this notion,
4198 so now the code just undefines EX_OK before #including unistd.h.
4200 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4201 in the smtp transport. When a block could not be written in a single
4202 write() function, the timeout was being re-applied to each part-write.
4203 This seems wrong - if the receiver was accepting one byte at a time it
4204 would take for ever. The timeout is now adjusted when this happens. It
4205 doesn't have to be particularly precise.
4207 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4208 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4210 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4211 without a domain if the check to <postmaster@domain> fails.
4213 SC/01 Eximstats: added -xls and the ability to specify output files
4214 (patch written by Frank Heydlauf).
4216 SC/02 Eximstats: use FileHandles for outputting results.
4218 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4220 SC/04 Eximstats: fixed display of large numbers with -nvr option
4222 SC/05 Eximstats: fixed merging of reports with empty tables.
4224 SC/06 Eximstats: added the -include_original_destination flag
4226 SC/07 Eximstats: removed tabs and trailing whitespace.
4228 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4230 TK/06 MBOX spool code: Add real "From " MBOX separator line
4231 so the .eml file is really in mbox format (even though
4232 most programs do not really care). Patch from Alex Miller.
4234 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4235 The latter is generated from $received_to and is only set if the
4236 message has one envelope recipient. SA can use these headers,
4237 obviously out-of-the-box. Patch from Alex Miller.
4239 PH/08 The ${def test on a variable was returning false if the variable's
4240 value was "0", contrary to what the specification has always said!
4241 The result should be true unless the variable is empty.
4243 PH/09 The syntax error of a character other than { following "${if
4244 def:variable_name" (after optional whitespace) was not being diagnosed.
4245 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4246 accidental colon was present, for example, could give incorrect results.
4248 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4249 result is used (not including appendfile, where other changes are about
4252 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4253 This involved changing a lot of size variables from int to off_t. It
4254 should work with maildirs and everything.
4256 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4257 spamd dying while we are connected to it.
4259 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4262 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4263 function for BDB 4.3.
4265 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4267 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4268 the sources for PCRE have been re-arranged and more files are now
4271 PH/15 The code I had for printing potentially long long variables in PH/11
4272 above was not the best (it lost precision). The length of off_t variables
4273 is now inspected at build time, and an appropriate printing format (%ld
4274 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4275 to be "long long int" or "long int". This is needed for the internal
4276 formatting function string_vformat().
4278 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4279 the configuration file to be ":syslog", then the script "guesses" where
4280 the logs files are, rather than using the compiled in default. In our
4281 case the guess is not the same as the compiled default, so the script
4282 suddenly stopped working when I started to use syslog. The patch checks
4283 to see if log_file_path is "". If so, it attempts to read it from exim
4284 with no configuration file to get the compiled in version, before it
4285 falls back to the previous guessing code."
4287 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4288 implementing BATV in an Exim configuration. See NewStuff for the gory
4291 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4292 Makefile that are specific to HP-UX.
4294 PH/18 If the "use_postmaster" option was set for a recipient callout together
4295 with the "random" option, the postmaster address was used as the MAIL
4296 FROM address for the random test, but not for the subsequent recipient
4297 test. It is now used for both.
4299 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4300 patch removes a few documentation additions to RFC 3028, because the
4301 latest draft now contains them. It adds the new en;ascii-case comparator
4302 and a new error check for 8bit text in MIME parts. Comparator and
4303 require names are now matched exactly. I enabled the subaddress
4304 extension, but it is not well tested yet (read: it works for me)."
4306 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4307 rework some of the code of TK/09 above to avoid the hardwired use of
4308 "%lld" and "long long". Replaced the call to snprintf() with a call to
4311 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4312 records point to non-existent hosts", "retry timeout exceeded", and
4313 "retry time not reached for any host after a long failure period".
4315 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4316 experimental DomainKeys support:
4318 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4319 (2) On an error such as an illegally used "control", the wrong name for
4320 the control was given.
4322 These problems did NOT occur unless DomainKeys support was compiled.
4324 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4326 PH/24 Added ${if match_ip condition.
4328 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4329 databases so that it will be absolutely obvious if a crash occurs in the
4330 DB library. This is a regular occurrence (often caused by mis-matched
4333 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4334 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4335 picked up on a user's system that detects such things. There doesn't seem
4336 to be a gcc warning option for this - only an attribute that has to be
4337 put on the function's prototype. It seems that in Fedora Core 4 they have
4338 set this on a number of new functions. No doubt there will be more in due
4341 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4342 specify a transport. However, if an address that was verified by such a
4343 router was the subject of a callout, Exim crashed because it tried to
4344 read the rcpt_include_affixes from the non-existent transport. Now it
4345 just assumes that the setting of that option is false. This bug was
4346 introduced by 4.51/PH/31.
4348 PH/28 Changed -d+all to exclude +memory, because that information is very
4349 rarely of interest, but it makes the output a lot bigger. People tend to
4350 do -d+all out of habit.
4352 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4353 code in os-type was giving problems when libc.so lives in lib64, like on
4356 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4357 aren't the modern standard, and it seems that some systems' include files
4358 don't always have them. Exim was already checking for some of the newer
4359 ones like T_AAAA, and defining it itself. I've added checks for all the
4360 record types that Exim uses.
4362 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4363 not automatically generating a new one, as it is supposed to. This
4364 prevented TLS from working. If the file did exist, but contained invalid
4365 data, a new version was generated, as expected. It was only the case of a
4366 non-existent file that was broken.
4368 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4369 with a change in libdomainkeys > 0.64.
4371 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4372 from DNS. If the selector record carries the flag, it now has
4373 precedence over the domain-wide flag.
4375 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4377 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4378 the use of a port name that isn't defined in /etc/services) occurred, the
4379 message was deferred as in a normal delivery, and thus remained on the
4380 spool, instead of being failed because of the mua_wrapper setting. This
4381 is now fixed, and I tidied up some of the mua_wrapper messages at the
4384 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4385 the messages in a hash of arrays rather than using individual hashes.
4386 This is a bit cleaner and results in dramatic memory savings, albeit
4387 at a slight CPU cost.
4389 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4390 as requested by Marc Sherman.
4392 SC/10 Eximstats: added histograms for user specified patterns as requested
4395 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4397 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4398 fopen() in the content-scanning modules that did not already have it.
4404 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4405 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4407 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4409 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4411 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4412 to test Sieve filters that use "vacation".
4414 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4415 that changes the way the GnuTLS parameters are stored in the cache file.
4416 The new format can be generated externally. For backward compatibility,
4417 if the data in the cache doesn't make sense, Exim assumes it has read an
4418 old-format file, and it generates new data and writes a new file. This
4419 means that you can't go back to an older release without removing the
4422 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4423 work if there are any delivery delays because "one_time" forces the
4424 parent to be marked "delivered", so its unseen clone is never tried
4425 again. For this reason, Exim now forbids the simultaneous setting of
4428 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4429 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4430 entry if you want to know the details. The fix, however, neglected to
4431 consider the case when local delivery batching is involved. The test for
4432 "previously delivered" was not happening when checking to see if an
4433 address could be batched with a previous (undelivered) one; under
4434 certain circumstances this could lead to multiple deliveries to the same
4437 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4438 in its include files, and this causes problems building Exim.
4440 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4441 header_syntax) but Exim was just ignoring anything given after a slash.
4442 In particular, this caused confusion with an attempt to use "verify =
4443 reverse_host_lookup/defer_ok". An error is now given when options are
4444 supplied for verify items that do not have them. (Maybe reverse_host_
4445 lookup should have a defer_ok option, but that's a different point.)
4447 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4448 defined by RFC 821) to 2048, because there were problems with some AUTH
4449 commands, and RFC 1869 says the size should be increased for extended
4450 SMTP commands that take arguments.
4452 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4455 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4456 "unknown" error; now it says that the functionality isn't in the binary.
4458 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4459 an address' error message when a string expansion fails (syntax or
4460 whatever). Otherwise the password may appear in the log. Following change
4461 PH/42 below, there is no longer a chance of it appearing in a bounce
4464 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4466 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4467 of its addresses was ever tried. (Bugzilla bug #2.)
4469 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4470 the result incorrectly in the debug output. (It correctly added a newline
4471 to what was transported.)
4473 TF/01 Added $received_time.
4475 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4476 commented out examples of how to interface to a virus scanner and to
4477 SpamAssassin. Also added commented examples of av_scanner and
4478 spamd_address settings.
4480 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4481 and controls are allowed in which ACLs. There were a couple of minor
4482 errors. Some of the entries in the conditions table (which is a table of
4483 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4484 negation of where the condition IS allowed.
4486 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4488 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4489 header file does not have a version number, so I've had to invent a new
4490 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4491 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4492 radiusclient), but it was contributed by a Radius user.
4494 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4495 files or directories, for OpenSSL.
4497 PH/19 When an Exim process that is running as root has to create an Exim log
4498 file, it does so in a subprocess that runs as exim:exim so as to get the
4499 ownership right at creation (otherwise, other Exim processes might see
4500 the file with the wrong ownership). There was no test for failure of this
4501 fork() call, which would lead to the process getting stuck as it waited
4502 for a non-existent subprocess. Forks do occasionally fail when resources
4503 run out. I reviewed all the other calls to fork(); they all seem to check
4506 PH/20 When checking for unexpected SMTP input at connect time (before writing
4507 the banner), Exim was not dealing correctly with a non-positive return
4508 from the read() function. If the client had disconnected by this time,
4509 the result was a log entry for a synchronization error with an empty
4510 string after "input=" when read() returned zero. If read() returned -1
4511 (an event I could not check), uninitialized data bytes were printed.
4512 There were reports of junk text (parts of files, etc) appearing after
4515 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4517 PH/22 Added support for macro redefinition, and (re)definition in between
4518 driver and ACL definitions.
4520 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4521 forgetting to use the resulting value; it was using the unexpanded value.
4523 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4524 hadn't been configured. The fix is from Juergen Kreileder, who
4525 understands it better than I do:
4527 "Here's what I see happening with three configured cyrus_sasl
4528 authenticators configured (plain, login, cram-md5):
4530 On startup auth_cyrus_sasl_init() gets called for each of these.
4531 This means three calls to sasl_listmech() without a specified mech_list.
4532 => SASL tests which mechs of all available mechs actually work
4533 => three warnings about OTP not working
4534 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4536 With the patch, sasl_listmech() also gets called three times. But now
4537 SASL's mech_list option is set to the server_mech specified in the the
4538 authenticator. Or in other words, the answer from sasl_listmech()
4539 gets limited to just the mech you're testing for (which is different
4541 => the return list contains just 'plain' or 'login', 'cram-md5' or
4542 nothing depending on the value of ob->server_mech.
4544 I've just tested the patch: Authentication still works fine,
4545 unavailable mechs specified in the exim configuration are still
4546 caught, and the auth.log warnings about OTP are gone."
4548 PH/25 When debugging is enabled, the contents of the command line are added
4549 to the debugging output, even when log_selector=+arguments is not
4552 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4553 answer is "GNU", and only if the return is "GNU/something" is the answer
4556 PH/27 $acl_verify_message is now set immediately after the failure of a
4557 verification in an ACL, and so is available in subsequent modifiers. In
4558 particular, the message can be preserved by coding like this:
4560 warn !verify = sender
4561 set acl_m0 = $acl_verify_message
4563 Previously, $acl_verify_message was set only while expanding "message"
4564 and "log_message" when a very denied access.
4566 PH/28 Modified OS/os.c-Linux with
4568 -#ifndef OS_LOAD_AVERAGE
4569 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4571 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4572 nomenclature these days.)
4574 PH/29 Installed patch from the Sieve maintainer that adds the options
4575 sieve_useraddress and sieve_subaddress to the redirect router.
4577 PH/30 In these circumstances:
4578 . Two addresses routed to the same list of hosts;
4579 . First host does not offer TLS;
4580 . First host accepts first address;
4581 . First host gives temporary error to second address;
4582 . Second host offers TLS and a TLS session is established;
4583 . Second host accepts second address.
4584 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4585 and peerdn, if requested) that were in fact used only for the second
4588 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4589 attention to any local part prefix or suffix that was matched by the
4590 router that accepted the address. It now behaves in the same way as it
4591 does for delivery: the affixes are removed from the local part unless
4592 rcpt_include_affixes is set on the transport.
4594 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4595 timeout during the DATA phase of an incoming message.
4597 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4598 applied a patch sanctioned by the Sieve maintainer.
4600 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4601 the uid or gid is negative. A case of a negative gid caused this to be
4602 noticed. The fix allows for either to be negative.
4604 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4605 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4608 PH/36 The change PH/12 above was broken. Fixed it.
4610 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4611 the grounds that routing the same address twice would always produce the
4612 same answer. This might have been true once, but it is certainly no
4613 longer true now. Routing a child address may depend on the previous
4614 routing that produced that child. Some complicated redirection strategies
4615 went wrong when messages had multiple recipients, and made Exim's
4616 behaviour dependent on the order in which the addresses were given.
4618 I have moved the duplicate checking until after the routing is complete.
4619 Exim scans the addresses that are assigned to local and remote
4620 transports, and removes any duplicates. This means that more work will be
4621 done, as duplicates will always all be routed, but duplicates are
4622 presumably rare, so I don't expect this is of any significance.
4624 For deliveries to pipes, files, and autoreplies, the duplicate checking
4625 still happens during the routing process, since they are not going to be
4628 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4629 It corrects a timeout issue with spamd. This is Ian's comment: "The
4630 background is that sometimes spamd either never reads data from a
4631 connection it has accepted, or it never writes response data. The exiscan
4632 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4633 blindly assumes that writes won't block so it may never time out."
4635 PH/39 Allow G after quota size as well as K and M.
4637 PH/40 The value set for $authenticated_id in an authenticator may not contain
4638 binary zeroes or newlines because the value is written to log lines and
4639 to spool files. There was no check on this. Now the value is run through
4640 the string_printing() function so that such characters are converted to
4641 printable escape sequences.
4643 PH/41 $message_linecount is a new variable that contains the total number of
4644 lines in the message. Compare $body_linecount, which is the count for the
4647 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4648 bounce and delay warning messages, except in certain special cases, which
4651 (a) An SMTP error message from a remote host;
4652 (b) A message specified in a :fail: redirection;
4653 (c) A message specified in a "fail" command in a system filter;
4654 (d) A message specified in a FAIL return from the queryprogram router;
4655 (e) A message specified by the cannot_route_message router option.
4657 In these cases only, Exim does include the error details in bounce and
4658 warning messages. There are also a few cases where bland messages such
4659 as "unrouteable address" or "local delivery error" are given.
4661 PH/43 $value is now also set for the "else" part of a ${run expansion.
4663 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4664 being worked on, but at least Exim now implements the latest version to
4667 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4668 process to complete was treated as a delivery failure, a timeout while
4669 writing the message to the pipe was logged, but erroneously treated as a
4670 successful delivery. Such timeouts include transport filter timeouts. For
4671 consistency with the overall process timeout, these timeouts are now
4672 treated as errors, giving rise to delivery failures by default. However,
4673 there is now a new Boolean option for the pipe transport called
4674 timeout_defer, which, if set TRUE, converts the failures into defers for
4675 both kinds of timeout. A transport filter timeout is now identified in
4678 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4679 systems where "make" and "gmake" are different, calling "gmake" at top
4680 level broke things. I've arranged for the value of $(MAKE) to be passed
4681 from the Makefile to this script so that it can call the same version of
4685 A note about Exim versions 4.44 and 4.50
4686 ----------------------------------------
4688 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4689 changes of various kinds. As a consequence, a big documentation update was
4690 needed. This delayed the release for rather longer than seemed good, especially
4691 in the light of a couple of (minor) security issues. Therefore, the changes
4692 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4693 release. So 4.44 and 4.50 are in effect two different branches that both start
4696 I have left the 4.50 change log unchanged; it contains all the changes since
4697 4.43. The change log for 4.44 is below; many of its items are identical to
4698 those for 4.50. This seems to be the most sensible way to preserve the
4699 historical information.
4705 1. Minor wording change to the doc/README.SIEVE file.
4707 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4708 computation of the current number of files was incorrect.
4710 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4711 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4714 4. Give more explanation in the error message when the command for a transport
4715 filter fails to execute.
4717 5. There are several places where Exim runs a non-Exim command in a
4718 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4719 was being done only for the command run by the queryprogram router. It is
4720 now done for all such subprocesses. The other cases are: ${run, transport
4721 filters, and the commands run by the lmtp and pipe transports.
4723 6. Added CONFIGURE_GROUP build-time option.
4725 7. Some older OS have a limit of 256 on the maximum number of file
4726 descriptors. Exim was using setrlimit() to set 1000 as a large value
4727 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4728 systems. I've change it so that if it can't get 1000, it tries for 256.
4730 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4731 was an oversight, and furthermore, ever since the addition of extra
4732 controls (e.g. 4.43/32), the checks on when to allow different forms of
4733 "control" were broken. There should now be diagnostics for all cases when a
4734 control that does not make sense is encountered.
4736 9. Added the /retain_sender option to "control=submission".
4738 10. $recipients is now available in the predata ACL (oversight).
4740 11. Tidy the search cache before the fork to do a delivery from a message
4741 received from the command line. Otherwise the child will trigger a lookup
4742 failure and thereby defer the delivery if it tries to use (for example) a
4743 cached ldap connection that the parent has called unbind on.
4745 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4746 of $address_data from the recipient verification was clobbered by the
4747 sender verification.
4749 13. The value of address_data from a sender verification is now available in
4750 $sender_address_data in subsequent conditions in the ACL statement.
4752 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4754 15. Added a new option "connect=<time>" to callout options, to set a different
4757 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4758 was its contents. (It was OK if the option was not defined at all.)
4760 17. A "Completed" log line is now written for messages that are removed from
4761 the spool by the -Mrm option.
4763 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4764 information about exactly what failed.
4766 19. Added -dd to debug only the daemon process.
4768 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4769 handles timeouts, both on the server side and network timeouts. Renamed the
4770 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4772 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4773 It is now set to "smtps".
4775 22. $host_address is now set to the target address during the checking of
4776 ignore_target_hosts.
4778 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4779 being passed; this would have caused $sender_host_name to have been used if
4780 matching the list had actually called for a host name (not very likely,
4781 since this list is usually IP addresses). A host name is now passed as
4784 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4785 code that specifies a non-restarting handler (typically sigaction() in
4786 modern systems) in an attempt to fix a rare and obscure crash bug.
4788 25. Narrowed the window for a race in the daemon that could cause it to ignore
4789 SIGCHLD signals. This is not a major problem, because they are used only to
4790 wake it up if nothing else does.
4792 26. A malformed maildirsize file could cause Exim to calculate negative values
4793 for the mailbox size or file count. Odd effects could occur as a result.
4794 The maildirsize information is now recalculated if the size or filecount
4797 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4798 support for a long time. Removed HAVE_SYS_VFS_H.
4800 28. Installed the latest version of exipick from John Jetmore.
4802 29. In an address list, if the pattern was not a regular expression, an empty
4803 subject address (from a bounce message) matched only if the pattern was an
4804 empty string. Non-empty patterns were not even tested. This was the wrong
4805 because it is perfectly reasonable to use an empty address as part of a
4806 database query. An empty address is now tested by patterns that are
4807 lookups. However, all the other forms of pattern expect the subject to
4808 contain a local part and a domain, and therefore, for them, an empty
4809 address still always fails if the pattern is not itself empty.
4811 30. Exim went into a mad DNS loop when attempting to do a callout where the
4812 host was specified on an smtp transport, and looking it up yielded more
4813 than one IP address.
4815 31. Re-factored the code for checking spool and log partition space into a
4816 function that finds that data and another that does the check. The former
4817 is then used to implement four new variables: $spool_space, $log_space,
4818 $spool_inodes, and $log_inodes.
4820 32. The RFC2047 encoding function was originally intended for short strings
4821 such as real names; it was not keeping to the 75-character limit for
4822 encoded words that the RFC imposes. It now respects the limit, and
4823 generates multiple encoded words if necessary. To be on the safe side, I
4824 have increased the buffer size for the ${rfc2047: expansion operator from
4827 33. It is now permitted to omit both strings after an "if" condition; if the
4828 condition is true, the result is "true". As before, when the second string
4829 is omitted, a false condition yields an empty string. This makes it less
4830 cumbersome to write custom ACL and router conditions.
4832 34. Failure to deliver a bounce message always caused it to be frozen, even if
4833 there was an errors_to setting on the router. The errors_to setting is now
4836 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4837 canonical form (fully expanded) before being placed in
4838 $sender_host_address.
4840 36. The table in the code that translates DNS record types into text (T_A to
4841 "A" for instance) was missing entries for NS and CNAME. It is just possible
4842 that this could have caused confusion if both these types were looked up
4843 for the same domain, because the text type is used as part of Exim's
4844 per-process caching. But the chance of anyone hitting this buglet seems
4847 37. The dnsdb lookup has been extended in a number of ways.
4849 (1) There is a new type, "zns", which walks up the domain tree until it
4850 finds some nameserver records. It should be used with care.
4852 (2) There is a new type, "mxh", which is like "mx" except that it returns
4853 just the host names, not the priorities.
4855 (3) It is now possible to give a list of domains (or IP addresses) to be
4856 looked up. The behaviour when one of the lookups defers can be
4857 controlled by a keyword.
4859 (4) It is now possible to specify the separator character for use when
4860 multiple records are returned.
4862 38. The dnslists ACL condition has been extended: it is now possible to supply
4863 a list of IP addresses and/or domains to be looked up in a particular DNS
4866 39. Added log_selector=+queue_time_overall.
4868 40. When running the queue in the test harness, wait just a tad after forking a
4869 delivery process, to get repeatability of debugging output.
4871 41. Include certificate and key file names in error message when GnuTLS fails
4872 to set them up, because the GnuTLS error message doesn't include the name
4873 of the failing file when there is a problem reading it.
4875 42. Allow both -bf and -bF in the same test run.
4877 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4879 44. The "Exiscan patch" is now merged into the mainline Exim source.
4881 45. Sometimes the final signoff response after QUIT could fail to get
4882 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4883 < 0 before doing a fflush(). This bug looks as though it goes back to the
4884 introduction of TLS in release 3.20, but "sometimes" must have been rare
4885 because the tests only now provoked it.
4887 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4888 (this can affect the format of dates).
4890 47. exim_tidydb, when checking for the continued existence of a message for
4891 which it has found a message-specific retry record, was not finding
4892 messages that were in split spool directories. Consequently, it was
4893 deleting retry records that should have stayed in existence.
4895 48. Steve fixed some bugs in eximstats.
4897 49. The SPA authentication driver was not abandoning authentication and moving
4898 on to the next authenticator when an expansion was forced to fail,
4899 contradicting the general specification for all authenticators. Instead it
4900 was generating a temporary error. It now behaves as specified.
4902 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4903 (the order specifies the preference for clients). The order is now AES256,
4904 AES128, 3DES, ARCFOUR128.
4906 51. Small patch to Sieve code - explicitly set From: when generating an
4909 52. Exim crashed if a remote delivery caused a very long error message to be
4910 recorded - for instance if somebody sent an entire SpamAssassin report back
4911 as a large number of 550 error lines. This bug was coincidentally fixed by
4912 increasing the size of one of Exim's internal buffers (big_buffer) that
4913 happened as part of the Exiscan merge. However, to be on the safe side, I
4914 have made the code more robust (and fixed the comments that describe what
4917 53. Now that there can be additional text after "Completed" in log lines (if
4918 the queue_time_overall log selector is set), a one-byte patch to exigrep
4919 was needed to allow it to recognize "Completed" as not the last thing in
4922 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4923 patch that reportedly fixes this has been added. I am not expert enough to
4924 create a test for it. This is what the patch creator wrote:
4926 "I found a little strange behaviour of ldap code when working with
4927 Windows 2003 AD Domain, where users was placed in more than one
4928 Organization Units. When I tried to give exim partial DN, the exit code
4929 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4930 But simultaneously result of request was absolutely normal ldap result,
4931 so I produce this patch..."
4933 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4934 REFERENCE, so I have modified the code to exclude the patch when that macro
4937 55. Some experimental protocols are using DNS PTR records for new purposes. The
4938 keys for these records are domain names, not reversed IP addresses. The
4939 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4940 leaves it alone. Component reversal etc. now happens only for IP addresses.
4943 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4945 57. Double the size of the debug message buffer (to 2048) so that more of very
4946 long debug lines gets shown.
4948 58. The exicyclog utility now does better if the number of log files to keep
4949 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4951 59. Two changes related to the smtp_active_hostname option:
4953 (1) $smtp_active_hostname is now available as a variable.
4954 (2) The default for smtp_banner uses $smtp_active_hostname instead
4955 of $primary_hostname.
4957 60. The host_aton() function is supposed to be passed a string that is known
4958 to be a valid IP address. However, in the case of IPv6 addresses, it was
4959 not checking this. This is a hostage to fortune. Exim now panics and dies
4960 if the condition is not met. A case was found where this could be provoked
4961 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4962 components; fortuitously, this particular loophole had already been fixed
4963 by change 4.50/55 above.
4965 If there are any other similar loopholes, the new check in host_aton()
4966 itself should stop them being exploited. The report I received stated that
4967 data on the command line could provoke the exploit when Exim was running as
4968 exim, but did not say which command line option was involved. All I could
4969 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4970 running as the user.
4973 61. There was a buffer overflow vulnerability in the SPA authentication code
4974 (which came originally from the Samba project). I have added a test to the
4975 spa_base64_to_bits() function which I hope fixes it.
4978 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4979 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4981 63. The daemon start-up calls getloadavg() while still root for those OS that
4982 need the first call to be done as root, but it missed one case: when
4983 deliver_queue_load_max is set with deliver_drop_privilege. This is
4984 necessary for the benefit of the queue runner, because there is no re-exec
4985 when deliver_drop_privilege is set.
4987 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4988 This has been fixed.
4990 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4991 was in use, was not putting the data itself into the right store pool;
4992 consequently, it could be overwritten for a subsequent message in the same
4993 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4996 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4998 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4999 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5000 the function were treating the return as a boolean value, which happened to
5001 work because 0=false and not-0=true, but is not correct code.
5003 68. The host_aton() function was not handling scoped IPv6 addresses (those
5004 with, for example, "%eth0" on the end) correctly.
5006 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5007 negated items (that is, ~something) in unsigned ints. Some compilers
5008 apparently mutter when there is no cast.
5010 70. If an address verification called from an ACL failed, and did not produce a
5011 user-specific message (i.e. there was only a "system" message), nothing was
5012 put in $acl_verify_message. In this situation, it now puts the system
5015 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5016 session; change 4.31/43 added the unwanted input to the log line - except
5017 that it did not do this in the start of session case. It now does.
5019 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5020 This is wrong and can cause the other end to generate a synchronization
5021 error if it is another Exim or anything else that does the synchronization
5022 check. A QUIT command is no longer sent after a timeout.
5024 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5025 during host lookups.
5027 74. The defer_ok option of callout verification was not working if it was used
5028 when verifying addresses in header lines, that is, for this case:
5030 verify = header_sender/callout=defer_ok
5032 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5033 those file descriptors could be used for SMTP connections. If anything
5034 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5035 could be sent to the SMTP client, causing chaos. The daemon now opens
5036 stdin, stdout, and stderr to /dev/null when it puts itself into the
5039 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5040 log by default. The user can override this with suitable Perl magic.
5042 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5043 the log message when discard triggers, was not working for the DATA ACL or
5044 for the non-SMTP ACL.
5046 78. Error message wording change in sieve.c.
5048 79. If smtp_accept_max_per_host was set, the number of connections could be
5049 restricted to fewer than expected, because the daemon was trying to set up
5050 a new connection before checking whether the processes handling previous
5051 connections had finished. The check for completed processes is now done
5052 earlier. On busy systems, this bug wouldn't be noticed because something
5053 else would have woken the daemon, and it would have reaped the completed
5056 80. If a message was submitted locally by a user whose login name contained one
5057 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5058 It caused a spool format error. I have fixed the spool reading code. A
5059 related problem was that the "from" clause in the Received: line became
5060 illegal because of the space(s). It is now covered by ${quote_local_part.
5062 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5065 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5067 83. Patch from Sieve maintainer to fix unterminated string problem in
5068 "vacation" handling.
5070 84. Some minor changes to the Linux configuration files to help with other
5071 OS variants using glibc.
5073 85. One more patch for Sieve to update vacation handling to latest spec.
5076 ----------------------------------------------------
5077 See the note above about the 4.44 and 4.50 releases.
5078 ----------------------------------------------------
5084 1. Change 4.43/35 introduced a bug that caused file counts to be
5085 incorrectly computed when quota_filecount was set in an appendfile
5088 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5089 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5092 3. Give more explanation in the error message when the command for a transport
5093 filter fails to execute.
5095 4. There are several places where Exim runs a non-Exim command in a
5096 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5097 was being done only for the command run by the queryprogram router. It is
5098 now done for all such subprocesses. The other cases are: ${run, transport
5099 filters, and the commands run by the lmtp and pipe transports.
5101 5. Some older OS have a limit of 256 on the maximum number of file
5102 descriptors. Exim was using setrlimit() to set 1000 as a large value
5103 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5104 systems. I've change it so that if it can't get 1000, it tries for 256.
5106 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5107 was an oversight, and furthermore, ever since the addition of extra
5108 controls (e.g. 4.43/32), the checks on when to allow different forms of
5109 "control" were broken. There should now be diagnostics for all cases when a
5110 control that does not make sense is encountered.
5112 7. $recipients is now available in the predata ACL (oversight).
5114 8. Tidy the search cache before the fork to do a delivery from a message
5115 received from the command line. Otherwise the child will trigger a lookup
5116 failure and thereby defer the delivery if it tries to use (for example) a
5117 cached ldap connection that the parent has called unbind on.
5119 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5120 of $address_data from the recipient verification was clobbered by the
5121 sender verification.
5123 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5124 was its contents. (It was OK if the option was not defined at all.)
5126 11. A "Completed" log line is now written for messages that are removed from
5127 the spool by the -Mrm option.
5129 12. $host_address is now set to the target address during the checking of
5130 ignore_target_hosts.
5132 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5133 being passed; this would have caused $sender_host_name to have been used if
5134 matching the list had actually called for a host name (not very likely,
5135 since this list is usually IP addresses). A host name is now passed as
5138 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5139 code that specifies a non-restarting handler (typically sigaction() in
5140 modern systems) in an attempt to fix a rare and obscure crash bug.
5142 15. Narrowed the window for a race in the daemon that could cause it to ignore
5143 SIGCHLD signals. This is not a major problem, because they are used only to
5144 wake it up if nothing else does.
5146 16. A malformed maildirsize file could cause Exim to calculate negative values
5147 for the mailbox size or file count. Odd effects could occur as a result.
5148 The maildirsize information is now recalculated if the size or filecount
5151 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5152 support for a long time. Removed HAVE_SYS_VFS_H.
5154 18. Updated exipick to current release from John Jetmore.
5156 19. Allow an empty sender to be matched against a lookup in an address list.
5157 Previously the only cases considered were a regular expression, or an
5160 20. Exim went into a mad DNS lookup loop when doing a callout where the
5161 host was specified on the transport, if the DNS lookup yielded more than
5164 21. The RFC2047 encoding function was originally intended for short strings
5165 such as real names; it was not keeping to the 75-character limit for
5166 encoded words that the RFC imposes. It now respects the limit, and
5167 generates multiple encoded words if necessary. To be on the safe side, I
5168 have increased the buffer size for the ${rfc2047: expansion operator from
5171 22. Failure to deliver a bounce message always caused it to be frozen, even if
5172 there was an errors_to setting on the router. The errors_to setting is now
5175 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5176 canonical form (fully expanded) before being placed in
5177 $sender_host_address.
5179 24. Updated eximstats to version 1.33
5181 25. Include certificate and key file names in error message when GnuTLS fails
5182 to set them up, because the GnuTLS error message doesn't include the name
5183 of the failing file when there is a problem reading it.
5185 26. Expand error message when OpenSSL has problems setting up cert/key files.
5188 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5189 (this can affect the format of dates).
5191 28. exim_tidydb, when checking for the continued existence of a message for
5192 which it has found a message-specific retry record, was not finding
5193 messages that were in split spool directories. Consequently, it was
5194 deleting retry records that should have stayed in existence.
5196 29. eximstats updated to version 1.35
5197 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5198 1.35 - bugfix such that pie charts by volume are generated correctly
5200 30. The SPA authentication driver was not abandoning authentication and moving
5201 on to the next authenticator when an expansion was forced to fail,
5202 contradicting the general specification for all authenticators. Instead it
5203 was generating a temporary error. It now behaves as specified.
5205 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5206 (the order specifies the preference for clients). The order is now AES256,
5207 AES128, 3DES, ARCFOUR128.
5209 31. Small patch to Sieve code - explicitly set From: when generating an
5212 32. Exim crashed if a remote delivery caused a very long error message to be
5213 recorded - for instance if somebody sent an entire SpamAssassin report back
5214 as a large number of 550 error lines. This bug was coincidentally fixed by
5215 increasing the size of one of Exim's internal buffers (big_buffer) that
5216 happened as part of the Exiscan merge. However, to be on the safe side, I
5217 have made the code more robust (and fixed the comments that describe what
5220 33. Some experimental protocols are using DNS PTR records for new purposes. The
5221 keys for these records are domain names, not reversed IP addresses. The
5222 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5223 leaves it alone. Component reversal etc. now happens only for IP addresses.
5226 34. The host_aton() function is supposed to be passed a string that is known
5227 to be a valid IP address. However, in the case of IPv6 addresses, it was
5228 not checking this. This is a hostage to fortune. Exim now panics and dies
5229 if the condition is not met. A case was found where this could be provoked
5230 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5231 components; fortuitously, this particular loophole had already been fixed
5232 by change 4.50/55 or 4.44/33 above.
5234 If there are any other similar loopholes, the new check in host_aton()
5235 itself should stop them being exploited. The report I received stated that
5236 data on the command line could provoke the exploit when Exim was running as
5237 exim, but did not say which command line option was involved. All I could
5238 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5239 running as the user.
5242 35. There was a buffer overflow vulnerability in the SPA authentication code
5243 (which came originally from the Samba project). I have added a test to the
5244 spa_base64_to_bits() function which I hope fixes it.
5247 36. The daemon start-up calls getloadavg() while still root for those OS that
5248 need the first call to be done as root, but it missed one case: when
5249 deliver_queue_load_max is set with deliver_drop_privilege. This is
5250 necessary for the benefit of the queue runner, because there is no re-exec
5251 when deliver_drop_privilege is set.
5253 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5254 was in use, was not putting the data itself into the right store pool;
5255 consequently, it could be overwritten for a subsequent message in the same
5256 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5259 38. Sometimes the final signoff response after QUIT could fail to get
5260 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5261 < 0 before doing a fflush(). This bug looks as though it goes back to the
5262 introduction of TLS in release 3.20, but "sometimes" must have been rare
5263 because the tests only now provoked it.
5269 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5270 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5271 Now it returns an integer. A number of calls were still expecting a T/F
5272 return. Fortuitously, in all cases, the tests worked in OK situations,
5273 which is the norm. However, things would have gone wrong on any write
5274 failures on the smtp file descriptor. This function is used when sending
5275 messages over SMTP and also when doing verify callouts.
5277 2. When Exim is called to do synchronous delivery of a locally submitted
5278 message (the -odf or -odi options), it no longer closes stderr before doing
5281 3. Implemented the mua_wrapper option.
5283 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5285 5. Implemented the functions header_remove(), header_testname(),
5286 header_add_at_position(), and receive_remove_recipient(), and exported them
5289 6. If an ACL "warn" statement specified the addition of headers, Exim already
5290 inserted X-ACL-Warn: at the start if there was no header name. However, it
5291 was not making this test for the second and subsequent header lines if
5292 there were newlines in the string. This meant that an invalid header could
5293 be inserted if Exim was badly configured.
5295 7. Allow an ACL "warn" statement to add header lines at the start or after all
5296 the Received: headers, as well as at the end.
5298 8. Added the rcpt_4xx retry error code.
5300 9. Added postmaster_mailfrom=xxx to callout verification option.
5302 10. Added mailfrom=xxxx to the callout verification option, for verify=
5305 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5306 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5308 12. Inserted some casts to stop certain compilers warning when using pointer
5309 differences as field lengths or precisions in printf-type calls (mostly
5310 affecting debugging statements).
5312 13. Added optional readline() support for -be (dynamically loaded).
5314 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5315 same clock tick as a message's arrival, so that its received time was the
5316 same as the "first fail" time on the retry record, and that message
5317 remained on the queue past the ultimate address timeout, every queue runner
5318 would try a delivery (because it was past the ultimate address timeout) but
5319 after another failure, the ultimate address timeout, which should have then
5320 bounced the address, did not kick in. This was a "< instead of <=" error;
5321 in most cases the first failure would have been in the next clock tick
5322 after the received time, and all would be well.
5324 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5325 being recognized when the domain list was tested by the match_domain
5326 condition in an expansion string.
5328 16. Added the ${str2b64: operator.
5330 17. Exim was always calling setrlimit() to set a large limit for the number of
5331 processes, without checking whether the existing limit was already
5332 adequate. (It did check for the limit on file descriptors.) Furthermore,
5333 errors from getrlimit() and setrlimit() were being ignored. Now they are
5334 logged to the main and panic logs, but Exim does carry on, to try to do its
5335 job under whatever limits there are.
5337 18. Imported PCRE 5.0.
5339 19. Trivial typo in log message " temporarily refused connection" (the leading
5342 20. If the log selector return_path_on_delivery was set and an address was
5343 redirected to /dev/null, the delivery process crashed because it assumed
5344 that a return path would always be set for a "successful" delivery. In this
5345 case, the whole delivery is bypassed as an optimization, and therefore no
5348 21. Internal re-arrangement: the function for sending a challenge and reading
5349 a response while authentication was assuming a zero-terminated challenge
5350 string. It's now changed to take a pointer and a length, to allow for
5351 binary data in such strings.
5353 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5355 23. Exim was not respecting finduser_retries when seeking the login of the
5356 uid under which it was called; it was always trying 10 times. (The default
5357 setting of finduser_retries is zero.) Also, it was sleeping after the final
5358 failure, which is pointless.
5360 24. Implemented tls_on_connect_ports.
5362 25. Implemented acl_smtp_predata.
5364 26. If the domain in control=submission is set empty, Exim assumes that the
5365 authenticated id is a complete email address when it generates From: or
5366 Sender: header lines.
5368 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5369 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5370 chown and chgrp in /bin and hostname in /usr/bin.
5372 28. Exim was keeping the "process log" file open after each use, just as it
5373 does for the main log. This opens the possibility of it remaining open for
5374 long periods when the USR1 signal hits a daemon. Occasional processlog
5375 errors were reported, that could have been caused by this. Anyway, it seems
5376 much more sensible not to leave this file open at all, so that is what now
5379 29. The long-running daemon process does not normally write to the log once it
5380 has entered its main loop, and it closes the log before doing so. This is
5381 so that log files can straightforwardly be renamed and moved. However,
5382 there are a couple of unusual error situations where the daemon does write
5383 log entries, and I had neglected to close the log afterwards.
5385 30. The text of an SMTP error response that was received during a remote
5386 delivery was being truncated at 512 bytes. This is too short for some of
5387 the long messages that one sometimes sees. I've increased the limit to
5390 31. It is now possible to make retry rules that apply only when a message has a
5391 specific sender, in particular, an empty sender.
5393 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5394 it possible to be selective about when SMTP synchronization is enforced.
5396 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5398 32. Implemented hosts_connection_nolog.
5400 33. Added an ACL for QUIT.
5402 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5405 35. Added mailbox_size and mailbox_filecount to appendfile.
5407 36. Added control = no_multiline_responses to ACLs.
5409 37. There was a bug in the logic of the code that waits for the clock to tick
5410 in the case where the clock went backwards by a substantial amount such
5411 that the microsecond fraction of "now" was more than the microsecond
5412 fraction of "then" (but the whole seconds number was less).
5414 38. Added support for the libradius Radius client library this is found on
5415 FreeBSD (previously only the radiusclient library was supported).
5421 1. When certain lookups returned multiple values in the form name=value, the
5422 quoting of the values was not always being done properly. Specifically:
5423 (a) If the value started with a double quote, but contained no whitespace,
5425 (b) If the value contained whitespace other than a space character (i.e.
5426 tabs or newlines or carriage returns) it was not quoted.
5427 This fix has been applied to the mysql and pgsql lookups by writing a
5428 separate quoting function and calling it from the lookup code. The fix
5429 should probably also be applied to nisplus, ibase and oracle lookups, but
5430 since I cannot test any of those, I have not disturbed their existing code.
5432 2. A hit in the callout cache for a specific address caused a log line with no
5433 reason for rejecting RCPT. Now it says "Previous (cached) callout
5434 verification failure".
5436 3. There was an off-by-one bug in the queryprogram router. An over-long
5437 return line was truncated at 256 instead of 255 characters, thereby
5438 overflowing its buffer with the terminating zero. As well as fixing this, I
5439 have increased the buffer size to 1024 (and made a note to document this).
5441 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5442 when Exim is waiting for an SMTP response from a remote server, Exim
5443 restarts its select() call on the socket, thereby resetting its timeout.
5444 This is not a problem when such interrupts are rare. Somebody set up a cron
5445 job to run exiwhat every 2 minutes, which is less than the normal select()
5446 timeout (5 or 10 minutes). This meant that the select() timeout never
5447 kicked in because it was always reset. I have fixed this by comparing the
5448 time when an interrupt arrives with the time at the start of the first call
5449 to select(). If more time than the timeout has elapsed, the interrupt is
5450 treated as a timeout.
5452 5. Some internal re-factoring in preparation for the addition of Sieve
5453 extensions (by MH). In particular, the "personal" test is moved to a
5454 separate function, and given an option for scanning Cc: and Bcc: (which is
5455 not set for Exim filters).
5457 6. When Exim created an email address using the login of the caller as the
5458 local part (e.g. when creating a From: or Sender: header line), it was not
5459 quoting the local part when it contained special characters such as @.
5461 7. Installed new OpenBSD configuration files.
5463 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5464 try to make them clearer.
5466 9. Callout options, other than the timeout value, were being ignored when
5467 verifying sender addresses in header lines. For example, when using
5469 verify = header_sender/callout=no_cache
5471 the cache was (incorrectly) being used.
5473 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5474 only the Cygwin environment.
5476 11. When return_path_on_delivery was set as a log selector, if different remote
5477 addresses in the same message used different return paths and parallel
5478 remote delivery occurred, the wrong values would sometimes be logged.
5479 (Whenever a remote delivery process finished, the return path value from
5480 the most recently started remote delivery process was logged.)
5482 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5483 lines when AUTH and/or TLS are in use. This is the "received protocol"
5484 field. Exim used to use "asmtp" for authenticated SMTP, without any
5485 indication (in the protocol name) for TLS use. Now it follows the RFC and
5486 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5487 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5488 names appear in log lines as well as in Received: header lines.
5490 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5491 extensions, and comparison tests, and to fix some bugs.
5493 14. Changes to the "personal" filter test:
5495 (1) The test was buggy in that it was just doing the equivalent of
5496 "contains" tests on header lines. For example, if a user's address was
5497 anne@some.where, the "personal" test would incorrectly be true for
5499 To: susanne@some.where
5501 This test is now done by extracting each address from the header in turn,
5502 and checking the entire address. Other tests that are part of "personal"
5503 are now done using regular expressions (for example, to check local parts
5504 of addresses in From: header lines).
5506 (2) The list of non-personal local parts in From: addresses has been
5507 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5508 taken from the Sieve specification recommendations.
5510 (3) If the message contains any header line starting with "List-" it is
5511 treated as non-personal.
5513 (4) The test for "circular" in the Subject: header line has been removed
5514 because it now seems ill-conceived.
5516 15. Minor typos in src/EDITME comments corrected.
5518 16. Installed latest exipick from John Jetmore.
5520 17. If headers_add on a router specified a text string that was too long for
5521 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5522 of string_sprintf() is now avoided.
5524 18. $message_body_size was not set (it was always zero) when running the DATA
5525 ACL and the local_scan() function.
5527 19. For the "mail" command in an Exim filter, no default was being set for
5528 the once_repeat time, causing a random time value to be used if "once" was
5529 specified. (If the value happened to be <= 0, no repeat happened.) The
5530 default is now 0s, meaning "never repeat". The "vacation" command was OK
5531 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5532 (I found it when inspecting the code).
5534 20. There is now an overall timeout for performing a callout verification. It
5535 defaults to 4 times the callout timeout, which applies to individual SMTP
5536 commands during the callout. The overall timeout applies when there is more
5537 than one host that can be tried. The timeout is checked before trying the
5538 next host. This prevents very long delays if there are a large number of
5539 hosts and all are timing out (e.g. when the network connections are timing
5540 out). The value of the overall timeout can be changed by specifying an
5541 additional sub-option for "callout", called "maxwait". For example:
5543 verify = sender/callout=5s,maxwait=20s
5545 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5546 to the end before writing, but this should make it even safer).
5548 22. Exim was forgetting that it had advertised PIPELINING for the second and
5549 subsequent messages on an SMTP connection. It was also not resetting its
5550 memory on STARTTLS and an internal HELO.
5552 23. When Exim logs an SMTP synchronization error within a session, it now
5553 records whether PIPELINING has been advertised or not.
5555 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5556 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5557 rather than long int.
5559 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5561 26. Added the never_mail option to autoreply.
5567 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5568 crash if the getsockname() call failed; this can happen if a connection is
5569 closed very soon after it is established. The problem was simply in the
5570 order in which certain operations were done, causing Exim to try to write
5571 to the SMTP stream before it had set up the file descriptor. The bug has
5572 been fixed by making things happen in the correct order.
5578 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5579 before the connection was closed, thus losing the rejection response.
5581 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5582 some early Solaris releases, but causes trouble in current releases where
5583 socklen_t is defined.
5585 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5588 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5591 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5592 that releasing the top of it at the end releases what was used for sub-
5593 expansions (unless the block got too big). However, discard this block if
5594 the first thing is a variable or header, so that we can use its block when
5595 it is dynamic (useful for very large $message_headers, for example).
5597 6. Lookups now cache *every* query, not just the most recent. A new, separate
5598 store pool is used for this. It can be recovered when all lookup caches are
5599 flushed. Lookups now release memory at the end of their result strings.
5600 This has involved some general refactoring of the lookup sources.
5602 7. Some code has been added to the store_xxx() functions to reduce the amount
5603 of flapping under certain conditions.
5605 8. log_incoming_interface used to affect only the <= reception log lines. Now
5606 it causes the local interface and port to be added to several more SMTP log
5607 lines, for example "SMTP connection from", and rejection lines.
5609 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5611 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5613 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5614 could be overwritten at the end of the current message (or the start of a
5615 new message if it was set in a HELO ACL). The value is now preserved for
5616 the duration of the SMTP connection.
5618 12. If a transport had a headers_rewrite setting, and a matching header line
5619 contained an unqualified address, that address was qualified, even if it
5620 did not match any rewriting rules. The underlying bug was that the values
5621 of the flags that permit the existence of unqualified sender and recipient
5622 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5623 non-local messages, and by -bnq for local messages) were not being
5624 preserved with the message after it was received.
5626 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5627 "next input=" as part of the text comprising the host identity instead of
5628 the correct text. The code was using the same buffer for two different
5629 strings. However, depending on which order the printing function evaluated
5630 its arguments, the bug did not always show up. Under Linux, for example, my
5631 test suite worked just fine.
5633 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5634 doesn't work with some older versions of Perl. It has been changed to "my",
5635 which in any case is probably the better facility to use.
5637 15. A really picky compiler found some instances of statements for creating
5638 error messages that either had too many or two few arguments for the format
5641 16. The size of the buffer for calls to the DNS resolver has been increased
5642 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5643 for addresses that have a lot of PTR records. This alleviates a problem; it
5644 does not fully solve it.
5646 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5647 buffer now truncates the list and logs the incident, which is the same
5648 action as happens when Exim is looking up a host name and its aliases.
5649 Previously in this situation something unpredictable would happen;
5650 sometimes it was "internal error: store_reset failed".
5652 18. If a server dropped the connection unexpectedly when an Exim client was
5653 using GnuTLS and trying to read a response, the client delivery process
5654 crashed while trying to generate an error log message.
5656 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5657 string, for example:
5659 warn message = H1: something\nH2: something
5661 the text was added as a single header line from Exim's point of view
5662 though it ended up OK in the delivered message. However, searching for the
5663 second and subsequent header lines using $h_h2: did not work. This has been
5664 fixed. Similarly, if a system filter added multiple headers in this way,
5665 the routers could not see them.
5667 20. Expanded the error message when iplsearch is called with an invalid key to
5668 suggest using net-iplsearch in a host list.
5670 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5671 ACLs are no longer actually imposed (and a message to that effect is
5674 22. If a "gecos" field in a passwd entry contained escaped characters, in
5675 particular, if it contained a \" sequence, Exim got it wrong when building
5676 a From: or a Sender: header from that name. A second bug also caused
5677 incorrect handling when an unquoted " was present following a character
5678 that needed quoting.
5680 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5681 was not being matched caselessly.
5683 24. Arranged for all hyphens in the exim.8 source to be escaped with
5686 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5687 properly. Recipient callout cache records were still being keyed to include
5688 the sender, even when use_sender was set false. This led to far more
5689 callouts that were necessary. The sender is no longer included in the key
5690 when use_sender is false.
5692 26. Added "control = submission" modifier to ACLs.
5694 27. Added the ${base62d: operator to decode base 62 numbers.
5696 28. dnsdb lookups can now access SRV records.
5698 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5699 the configuration file.
5701 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5702 (-v) mode. This makes the output for a verbose queue run more intelligible.
5704 31. Added a use_postmaster feature to recipient callouts.
5706 32. Added the $body_zerocount variable, containing the number of binary zero
5707 bytes in the message body.
5709 33. The time of last modification of the "new" subdirectory is now used as the
5710 "mailbox time last read" when there is a quota error for a maildir
5713 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5715 35. Added +ignore_unknown as a special item in host lists.
5717 36. Code for decoding IPv6 addresses in host lists is now included, even if
5718 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5719 address was recognized as an IP address, but was then not correctly decoded
5720 into binary, causing unexpected and incorrect effects when compared with
5727 1. Very minor rewording of debugging text in manualroute to say "list of
5728 hosts" instead of "hostlist".
5730 2. If verify=header_syntax was set, and a header line with an unqualified
5731 address (no domain) and a large number of spaces between the end of the
5732 name and the colon was received, the reception process suffered a buffer
5733 overflow, and (when I tested it) crashed. This was caused by some obsolete
5734 code that should have been removed. The fix is to remove it!
5736 3. When running in the test harness, delay a bit after writing a bounce
5737 message to get a bit more predictability in the log output.
5739 4. Added a call to search_tidyup() just before forking a reception process. In
5740 theory, someone could use a lookup in the expansion of smtp_accept_max_
5741 per_host which, without the tidyup, could leave open a database connection.
5743 5. Added the variables $recipient_data and $sender_data which get set from a
5744 lookup success in an ACL "recipients" or "senders" condition, or a router
5745 "senders" option, similar to $domain_data and $local_part_data.
5747 6. Moved the writing of debug_print from before to after the "senders" test
5750 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5751 problems for message scanning, either using a data ACL, or using
5752 local_scan() because the Received: header was not generated till after they
5753 were called (in order to set the time as the time of reception completion).
5754 I have revised the way this works. The header is now generated after the
5755 body is received, but before the ACL or local_scan() are called. After they
5756 are run, the timestamp in the header is updated.
5762 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5763 before starting a queue runner without re-exec. This happened only when
5764 deliver_drop_privilege was set or when the Exim user was set to root. The
5765 effect of the bug was that timeouts during subsequent deliveries caused
5766 crashes instead of being properly handled. The handler is now left at its
5767 default (and expected) setting.
5769 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5770 message, again when deliver_drop_privilege is set or Exim is run as root.
5771 The bug described in (1) was not present in this case, but the tidying up
5772 of the other signals was missing. I have made the two cases consistent.
5774 3. The ignore_target_hosts setting on a manualroute router was being ignored
5775 for hosts that were looked up using the /MX notation.
5777 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5780 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5781 operated on the sender address. After changing the $sender_address to <>
5782 for the sender address verify, Exim was re-instated it as the original
5783 (before rewriting) address, but remembering that it had rewritten it, so it
5784 wasn't rewriting it again. This bug also had the effect of breaking the
5785 sender address verification caching when the sender address was rewritten.
5787 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5788 This has been changed so that if the ip literal address matches
5789 ignore_target_hosts, the router declines.
5791 7. Added expansion conditions match_domain, match_address, and match_local_
5792 part (NOT match_host).
5794 8. The placeholder for the Received: header didn't have a length field set.
5796 9. Added code to Exim itself and to exim_lock to test for a specific race
5797 condition that could lead to file corruption when using MBX delivery. The
5798 issue is with the lockfile that is created in /tmp. If this file is removed
5799 after a process has opened it but before that process has acquired a lock,
5800 there is the potential for a second process to recreate the file and also
5801 acquire a lock. This could lead to two Exim processes writing to the file
5802 at the same time. The added code performs the same test as UW imapd; it
5803 checks after acquiring the lock that its file descriptor still refers to
5804 the same named file.
5806 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5807 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5810 11. Added the smtp_active_hostname option. If used, this will typically be made
5811 to depend on the incoming interface address. Because $interface_address is
5812 not set up until the daemon has forked a reception process, error responses
5813 that can happen earlier (such as "too many connections") no longer contain
5816 12. If an expansion in a condition on a "warn" statement fails because a lookup
5817 defers, the "warn" statement is abandoned, and the next ACL statement is
5818 processed. Previously this caused the whole ACL to be aborted.
5820 13. Added the iplsearch lookup type.
5822 14. Added ident_timeout as a log selector.
5824 15. Added tls_certificate_verified as a log selector.
5826 16. Added a global option tls_require_ciphers (compare the smtp transport
5827 option of the same name). This controls incoming TLS connections.
5829 17. I finally figured out how to make tls_require_ciphers do a similar thing
5830 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5831 before starting the TLS session.
5833 18. Tabs are now shown as \t in -bP output.
5835 19. If the log selector return_path_on_delivery was set, Exim crashed when
5836 bouncing a message because it had too many Received: header lines.
5838 20. If two routers both had headers_remove settings, and the first one included
5839 a superfluous trailing colon, the final name in the first list and the
5840 first name in the second list were incorrectly joined into one item (with a
5841 colon in the middle).
5847 1. Added -C and -D options to the exinext utility, mainly to make it easier
5848 to include in the automated testing, but these could be helpful when
5849 multiple configurations are in use.
5851 2. The exinext utility was not formatting the output nicely when there was
5852 an alternate port involved in the retry record key, nor when there was a
5853 message id as well (for retries that were specific to a specific message
5854 and a specific host). It was also confused by IPv6 addresses, because of
5855 the additional colons they contain. I have fixed the IPv4 problem, and
5856 patched it up to do a reasonable job for IPv6.
5858 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5859 delivery, the log line now contains "pipelined" if PIPELINING was used.
5861 4. An SMTP transport process used to panic and die if the bind() call to set
5862 an explicit outgoing interface failed. This has been changed; it is now
5863 treated in the same way as a connect() failure.
5865 5. A reference to $sender_host_name in the part of a conditional expansion
5866 that was being skipped was still causing a DNS lookup. This no longer
5869 6. The def: expansion condition was not recognizing references to header lines
5870 that used bh_ and bheader_.
5872 7. Added the _cache feature to named lists.
5874 8. The code for checking quota_filecount in the appendfile transport was
5875 allowing one more file than it should have been.
5877 9. For compatibility with Sendmail, the command line option
5885 and sets the incoming protocol and host name (for trusted callers). The
5886 host name and its colon can be omitted when only the protocol is to be set.
5887 Note the Exim already has two private options, -pd and -ps, that refer to
5888 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5889 "s", but I don't think that's a major issue.
5891 10. A number of refactoring changes to the code, none of which should affect
5894 (a) The number of logging options was getting close to filling up the
5895 32-bit word that was used as a bit map. I have split them into two classes:
5896 those that are passed in the argument to log_write(), and those that are
5897 only ever tested independently outside of that function. These are now in
5898 separate 32-bit words, so there is plenty of room for expansion again.
5899 There is no change in the user interface or the logging behaviour.
5901 (b) When building, for example, log lines, the code previously used a
5902 macro that called string_cat() twice, in order to add two strings. This is
5903 not really sufficiently general. Furthermore, there was one instance where
5904 it was actually wrong because one of the argument was used twice, and in
5905 one call a function was used. (As it happened, calling the function twice
5906 did not affect the overall behaviour.) The macro has been replaced by a
5907 function that can join an arbitrary number of extra strings onto a growing
5910 (c) The code for expansion conditions now uses a table and a binary chop
5911 instead of a serial search (which was left over from when there were very
5912 few conditions). Also, it now recognizes conditions like "pam" even when
5913 the relevant support is not compiled in: a suitably worded error message is
5914 given if an attempt is made to use such a condition.
5916 11. Added ${time_interval:xxxxx}.
5918 12. A bug was causing one of the ddress fields not to be passed back correctly
5919 from remote delivery subprocesses. The field in question was not being
5920 subsequently used, so this caused to problems in practice.
5922 13. Added new log selectors queue_time and deliver_time.
5924 14. Might have fixed a bug in maildirsizefile handling that threw up
5925 "unexpected character" debug warnings, and recalculated the data
5926 unnecessarily. In any case, I expanded the warning message to give more
5929 15. Added the message "Restricted characters in address" to the statements in
5930 the default ACL that block characters like @ and % in local parts.
5932 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5933 Three changes have been made:
5935 (a) There was a serious bug; a negative response to MAIL caused the whole
5936 recipient domain to be cached as invalid, thereby blocking all messages
5937 to all local parts at the same domain, from all senders. This bug has
5938 been fixed. The domain is no longer cached after a negative response to
5939 MAIL if the sender used is not empty.
5941 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5944 (c) A new callout option, "use_sender" has been added for people who want
5945 the modified behaviour.
5951 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5954 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5955 indeed breaks things for older releases.
5957 3. Added additional logging to the case where there is a problem reading data
5958 from a filter that is running in a subprocess using a pipe, in order to
5959 try to track down a specific problem.
5961 4. Testing facility fudge: when running in the test harness and attempting
5962 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5963 getting "No route to host". Convert this to a timeout.
5965 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5968 6. Some OS don't have socklen_t but use size_t instead. This affects the
5969 fifth argument of getsockopt() amongst other things. This is now
5970 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5971 can be set for individual OS. I have set it for SunOS5, OSF1, and
5972 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5973 some earlier ones do not.
5975 7. Change 4.30/15 was not doing the test caselessly.
5977 8. The standard form for an IPv6 address literal was being rejected by address
5978 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5979 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5980 this, as well as the form without the "IPv6" on the front (but only when
5981 address literals are enabled, of course).
5983 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5985 10. Exim crashed if a message with an empty sender address specified by -f
5986 encountered a router with an errors_to setting. This could be provoked only
5987 by a command such as
5991 where an empty string was supplied; "<>" did not hit this bug.
5993 11. Installed PCRE release 4.5.
5995 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5996 remained set. It is now erased.
5998 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5999 times from message ids (which are base 36 rather than the normal 62).
6001 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6002 were being counted as actual protocol errors, and logged if the log
6003 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6004 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6005 and DATA following a set of rejected RCPTs do not count as protocol errors.
6006 In other words, Exim assumes they were pipelined, though this may not
6007 actually be the case. Of course, in all cases the client gets an
6008 appropriate error code.
6010 15. If a lookup fails in an ACL condition, a message about the failure may
6011 be available; it is used if testing the ACL cannot continue, because most
6012 such messages specify what the cause of the deferral is. However, some
6013 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6014 that caused an old message to be retained and used if a later statement
6015 caused a defer, replacing the real cause of the deferral.
6017 16. If an IP address had so many PTR records that the DNS lookup buffer
6018 was not large enough to hold them, Exim could crash while trying to process
6019 the truncated data. It now detects and logs this case.
6021 17. Further to 4.21/58, another change has been made: if (and only if) the
6022 first line of a message (the first header line) ends with CRLF, a bare LF
6023 in a subsequent header line has a space inserted after it, so as not to
6024 terminate the header.
6026 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6027 unnecessarily, used atoi() instead of strtol(), and didn't check the
6028 termination when getting file sizes from file names by regex.
6030 19. Completely re-implemented the support for maildirsize files, in the light
6031 of a number of problems with the previous contributed implementation
6032 (4.30/29). In particular:
6034 . If the quota is zero, the maildirsize file is maintained, but no quota is
6037 . If the maildir directory does not exist, it is created before any attempt
6038 to write a maildirsize file.
6040 . The quota value in the file is just a cache; if the quota is changed in
6041 the transport, the new value overrides.
6043 . A regular expression is available for excluding directories from the
6046 20. The autoreply transport checks the characters in options that define the
6047 message's headers; it allows continued headers, but it was checking with
6048 isspace() after an embedded newline instead of explicitly looking for a
6051 21. If all the "regular" hosts to which an address was routed had passed their
6052 expiry times, and had not reached their retry times, the address was
6053 bounced, even if fallback hosts were defined. Now Exim should go on to try
6056 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6057 equivalent code in the SMTP transport. Some hosts send humungous responses
6058 to HELO/EHLO, more than 1024 it seems.
6060 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6061 gives compiler warnings in some environments. I've now done it "properly",
6064 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6065 (because of problems with the built-in one) was declared to return uschar *
6066 instead of char *, causing compiler failure.
6068 25. Fixed a file descriptor leak when processing alias/forward files.
6070 26. Fixed a minor format string issue in dbfn.c.
6072 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6074 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6075 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6078 29. When a sender address is verified, it is cached, to save repeating the test
6079 when there is more than one recipient in a message. However, when the
6080 verification involves a callout, it is possible for different callout
6081 options to be set for different recipients. It is too complicated to keep
6082 track of this in the cache, so now Exim always runs a verification when a
6083 callout is required, relying on the callout cache for the optimization.
6084 The overhead is duplication of the address routing, but this should not be
6087 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6088 to be verified with callout=postmaster, and the main callout worked but the
6089 postmaster check failed, the verification correctly failed. However, if a
6090 subsequent RCPT command asked for sender verification *without* the
6091 postmaster check, incorrect caching caused this verification also to fail,
6094 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6095 it was not caching the DNS options (qualify_single, search_parents) that
6096 were used when the lookup failed. A subsequent lookup with different
6097 options therefore always gave the same answer, though there were cases
6098 where it should not have. (Example: a "domains = !$mx_any" option on a
6099 dnslookup router: the "domains" option is always processed without any
6100 widening, but the router might have qualify_single set.) Now Exim uses the
6101 cached value only when the same options are set.
6103 32. Added John Jetmore's "exipick" utility to the distribution.
6105 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6106 than a timeout (e.g. a certificate is required, and is not provided), an
6107 Exim server now closes the connection immediately. Previously it waited for
6108 the client to close - but if the client is SSL, it seems that they each
6109 wait for each other, leading to a delay before one of them times out.
6111 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6112 maintained 0.8.x compatibility because I don't think many are using it, and
6113 it is clearly obsolete.
6115 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6118 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6119 client certificate was expired. A simple patch fixes this, though I don't
6120 understand the full logic of why the verify callback is called multiple
6123 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6124 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6125 which causes problems with some clients (such as the Certicom SSL Plus
6126 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6127 disables the coutermeasure allowing Eudora to connect."
6129 38. Exim was not checking that a write() to a log file succeeded. This could
6130 lead to Bad Things if a log got too big, in particular if it hit a file
6131 size limit. Exim now panics and dies if it cannot write to a log file, just
6132 as it does if it cannot open a log file.
6134 39. Modified OS/Makefile-Linux so that it now contains
6136 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6138 The two -D definitions ensure that Exim is compiled with large file
6139 support, which makes it possible to handle log files that are bigger than
6142 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6143 instance) a domain was checked against a named list that involved a lookup,
6144 causing $domain_data to be set, then another domain was checked against the
6145 same list, then the first domain was re-checked, the value of $domain_data
6146 after the final check could be wrong. In particular, if the second check
6147 failed, it could be set empty. This bug probably also applied to
6150 41. The strip_trailing_dot option was not being applied to the address given
6151 with the -f command-line option.
6153 42. The code for reading a message's header from the spool was incrementing
6154 $received_count, but never initializing it. This meant that the value was
6155 incorrect (doubled) while delivering a message in the same process in which
6156 it was received. In the most common configuration of Exim, this never
6157 happens - a fresh exec is done - but it can happen when
6158 deliver_drop_privilege is set.
6160 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6161 it now includes up to 150 characters of the unexpected data in the log
6164 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6165 and building data strings. The size of both of these buffers was 10 000
6166 bytes - far larger than anybody would *ever* want, thought I. Needless to
6167 say, somebody hit the limit. I have increased the maximum line length to
6168 20 000 and the maximum data length of concatenated lines to 100 000. I have
6169 also fixed two bugs, because there was no checking on these buffers. Tsk,
6170 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6171 buffer is too small.
6173 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6174 lsearch lookups. Now it does.
6176 46. When parsing a route_list item in a manualroute router, a fixed-length
6177 buffer was used for the list of hosts. I made this 1024 bytes long,
6178 thinking that nobody would ever have a list of hosts that long. Wrong.
6179 Somebody had a whole pile of complicated expansion conditions, and the
6180 string was silently truncated, leading to an expansion error. It turns out
6181 that it is easier to change to an unlimited length (owing to other changes
6182 that have happened since this code was originally written) than to build
6183 structure for giving a limitation error. The length of the item that
6184 expands into the list of hosts is now unlimited.
6186 47. The lsearch lookup could not handle data where the length of text line was
6187 more than 4095 characters. Such lines were truncated, leading to shortened
6188 data being returned. It should now handle lines of any length.
6190 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6191 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6194 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6195 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6196 no longer happens in comment lines. A list of replacements is now placed
6197 at the head of all of the source files, except those whose only change is
6198 to replace PERL_COMMAND in the very first #! line.
6200 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6201 messages on the queue, with a bottom-up merge sort, using code contributed
6202 by Michael Haardt. This should make operations like -bp somewhat faster on
6203 large queues. It won't affect queue runners, except when queue_run_in_order
6206 51. Installed eximstats 1.31 in the distribution.
6208 52. Added support for SRV lookups to the dnslookup router.
6210 53. If an ACL referred to $message_body or $message_body_end, the value was not
6211 reset for any messages that followed in the same SMTP session.
6213 54. The store-handling optimization for building very long strings was not
6214 differentiating between the different store pools. I don't think this
6215 actually made any difference in practice, but I've tidied it.
6217 55. While running the routers to verify a sender address, $sender_address
6218 was still set to the sender address. This is wrong, because when routing to
6219 send a bounce to the sender, it would be empty. Therefore, I have changed
6220 it so that, while verifying a sender address, $sender_address is set to <>.
6221 (There is no change to what happens when verifying a recipient address.)
6223 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6224 target A or AAAA records (if not already returned) without resetting the
6225 qualify_single or search_parents options of the DNS resolver. These are
6226 inappropriate in this case because the targets of MX and SRV records must
6227 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6228 target that, when qualified, matched something in the local domain. These
6229 two options are now turned off when doing these lookups.
6231 57. It seems that at least some releases of Reiserfs (which does not have the
6232 concept of a fixed number of inodes) returns zero and not -1 for the
6233 number of available inodes. This interacted badly with check_spool_inodes,
6234 which assumed that -1 was the "no such thing" setting. What I have done is
6235 to check that the total number of inodes is greater than zero before doing
6236 the test of how many are available.
6238 58. When a "warn" ACL statement has a log_message modifier, the message is
6239 remembered, and not repeated. This is to avoid a lot of repetition when a
6240 message has many recipients that cause the same warning to be written.
6241 However, Exim was preserving the list of already written lines for an
6242 entire SMTP session, which doesn't seem right. The memory is now reset if a
6243 new message is started.
6245 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6246 debugging output unless log_rewrite was also set.
6248 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6249 of (int)(handle) when we know that handle contains (void *)(-1).
6251 61. The Exim daemon panic-logs an error return when it closes the incoming
6252 connection. However "connection reset by peer" seems to be common, and
6253 isn't really an error worthy of noting specially, so that particular error
6256 62. When Exim is trying to find all the local interfaces, it used to panic and
6257 die if the ioctl to get the interface flags failed. However, it seems that
6258 on at least one OS (Solaris 9) it is possible to have an interface that is
6259 included in the list of interfaces, but for which you get a failure error
6260 for this call. This happens when the interface is not "plumbed" into a
6261 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6262 failure of the "get flags" call assumes that the interface is down.
6264 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6265 makes life easier for people who are doing arithmetic on fields extracted
6266 from dates, where you often get leading zeros that should not be
6267 interpreted as octal.
6269 64. Added qualify_domain to the redirect router, to override the global
6272 65. If a pathologically long header line contained very many addresses (the
6273 report of this problem mentioned 10 000) and each of them was rewritten,
6274 Exim could use up a very large amount of memory. (It kept on making new
6275 copies of the header line as it rewrote, and never released the old ones.)
6276 At the expense of a bit more processing, the header rewriting function has
6277 been changed so that it no longer eats memory in this way.
6279 66. The generation of the Received: header has been moved from the time that a
6280 message starts to be received, to the time that it finishes. The timestamp
6281 in the Received: header should now be very close to that of the <= log
6282 line. There are two side-effects of this change:
6284 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6285 logged header lines no longer include the local Received: line, because
6286 it has not yet been created. The same applies to a copy of the message
6287 that is returned to a non-SMTP sender when a message is rejected.
6289 (b) When a filter file is tested using -bf, no additional Received: header
6290 is added to the test message. After some thought, I decided that this
6293 This change does not affect the value of $received_for. It is still set
6294 after address rewriting, but before local_scan() is called.
6296 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6298 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6299 gave an unhelpful panic error message, and a defer error. I have managed to
6300 change this behaviour so that it now rejects any supplied certificate,
6301 which seems right, as the list of acceptable certificates is empty.
6303 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6304 gave an unhelpful defer error. I have not managed to make this reject any
6305 supplied certificates, but the error message it gives is "no certificate
6306 supplied", which is not helpful.
6308 70. exigrep's output now also includes lines that are not associated with any
6309 message, but which match the given pattern. Implemented by a patch from
6310 Martin Sluka, which also tidied up the Perl a bit.
6312 71. Recipient callout verification, like sender verification, was using <> in
6313 the MAIL FROM command. This isn't really the right thing, since the actual
6314 sender may affect whether the remote host accepts the recipient or not. I
6315 have changed it to use the actual sender in the callout; this means that
6316 the cache record is now keyed on a recipient/sender pair, not just the
6317 recipient address. There doesn't seem to be a real danger of callout loops,
6318 since a callout by the remote host to check the sender would use <>.
6319 [SEE ABOVE: changed after hitting problems.]
6321 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6322 temporary errors. However, in the case of such a code being given after
6323 the end of a data transmission (i.e. after ".") Exim was failing to write
6324 a retry record for the message. (Yes, there was some broken host that was
6325 actually sending 8xx at this point.)
6327 73. An unknown lookup type in a host list could cause Exim to panic-die when
6328 the list was checked. (An example that provoked this was putting <; in the
6329 middle of a list instead of at the start.) If this happened during a DATA
6330 ACL check, a -D file could be left lying around. This kind of configuration
6331 error no longer causes Exim to die; instead it causes a defer error. The
6332 incident is still logged to the main and panic logs.
6334 74. Buglet left over from Exim 3 conversion. The message "too many messages
6335 in one connection" was written to the rejectlog but not the mainlog, except
6336 when address rewriting (yes!) was being logged.
6338 75. Added write_rejectlog option.
6340 76. When a system filter was run not as root (that is, when system_filter_user
6341 was set), the values of the $n variables were not being returned to the
6342 main process; thus, they were not subsequently available in the $sn
6345 77. Added +return_path_on_delivery log selector.
6347 78. A connection timeout was being treated differently from recipients deferred
6348 when testing hosts_max_try with a message that was older than the host's
6349 retry timeout. (The host should not be counted, thus allowing all hosts to
6350 be tried at least once before bouncing.) This may have been the cause of an
6351 occasionally reported bug whereby a message would remain on the queue
6352 longer than the retry timeout, but would be bounced if a delivery was
6353 forced. I say "may" because I never totally pinned down the problem;
6354 setting up timeout/retry tests is difficult. See also the next item.
6356 79. The ultimate address timeout was not being applied to errors that involved
6357 a combination of host plus message (for example, a timeout on a MAIL
6358 command). When an address resolved to a number of possible hosts, and they
6359 were not all tried for each delivery (e.g. because of hosts_max_try), a
6360 message could remain on the queue longer than the retry timeout.
6362 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6365 81. Fixed an obscure SMTP outgoing bug which required at least the following
6366 conditions: (a) there was another message waiting for the same server;
6367 (b) the server returned 5xx to all RCPT commands in the first message so
6368 that the message was not completed; (c) the server dropped the connection
6369 or gave a negative response to the RSET that Exim sends to abort the
6370 transaction. The observed case was a dropped connection after DATA that had
6371 been sent in pipelining mode. That is, the server had advertised PIPELINING
6372 but was not implementing it correctly. The effect of the bug was incorrect
6373 behaviour, such as trying another host, and this could lead to a crash.
6379 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6380 and daemon.c were passed as pointers to ints; they should have been
6381 pointers to socklen_t variables (which are typically unsigned ints).
6383 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6386 3. Fixed a really odd bug that affected only the testing scheme; patching a
6387 certain fixed string in the binary changed the value of another string that
6388 happened to be identical to the end of the original first string.
6390 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6391 name", it returns that address as the IP address. On some operating
6392 systems (e.g. Solaris), it also passes back the IP address string as the
6393 "host name". However, on others (e.g. Linux), it passes back an empty
6394 string. Exim wasn't checking for this, and was changing the host name to an
6395 empty string, assuming it had been canonicalized.
6397 5. Although rare, it is permitted to have more than one PTR record for a given
6398 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6399 all the names associated with an address, because they do in Solaris.
6400 However, it seems that they do not in Linux for data that comes from the
6401 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6402 I found this out when I moved to a new Linux workstation and tried to run
6403 the Exim test suite.
6405 To get round this problem I have changed the code so that it now does its
6406 own call to the DNS to look up PTR records when searching for a host name.
6407 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6408 addresses that are only in /etc/hosts are still found.
6410 This behaviour is, however, controlled by an option called host_lookup_
6411 order, which defaults to "bydns:byaddr". If people want to use the other
6412 order, or indeed, just use one or the other means of lookup, they can
6413 specify it in this variable.
6415 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6416 some operating systems, this comes back from gethostbyaddr() as an empty
6417 string, and this is what Exim used to test for. However, it seems that in
6418 other systems, "." is yielded. Exim now tests for this case too.
6420 7. The values of check_spool_space and check_log_space are now held internally
6421 as a number of kilobytes instead of an absolute number of bytes. If a
6422 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6423 kilobyte. This means that much larger values can be stored.
6425 8. Exim monitor: an attempt to get the action menu when not actually pointing
6426 at a message produces an empty menu entitled "No message selected". This
6427 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6428 no entries in it ("Shell widget menu has zero width and/or height"). So I
6429 have added a single, blank menu entry in this case.
6431 9. Added ${quote_local_part.
6433 10. MIME decoding is now applied to the contents of Subject: header lines when
6436 11. Now that a reference to $sender_host_address automatically causes a reverse
6437 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6438 host lookup before query-style lookups in lists that might use this
6439 variable. This has therefore been abolished, and the "net-" prefix is no
6440 longer necessary for query-style lookups.
6442 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6443 have been a typo for LFLAGS, so it has been changed.
6445 13. The install script calls Exim with "-C /dev/null" in order to find the
6446 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6447 to be output. However, since Exim outputs its version number before the
6448 error, it didn't break the script. It just looked ugly. I fixed this by
6449 always allowing "-C /dev/null" if the caller is root.
6451 14. Ignore overlarge ACL variable number when reading spool file - insurance
6452 against a later release with more variables having written the file.
6454 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6455 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6456 this, as well as the form without the "IPv6" on the front.
6458 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6459 OS/Makefile-Darwin file.
6461 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6462 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6464 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6465 variable. However, some OS use ints for inodes. I've added cast to long int
6466 to get rid of the compiler warning.
6468 19. I had forgotten to lock out "/../" in configuration file names when
6469 ALT_CONFIG_PREFIX was set.
6471 20. Routers used for verification do not need to specify transports. However,
6472 if such a router generated a host list, and callout was configured, Exim
6473 crashed, because it could not find a port number from the (non-existent)
6474 transport. It now assumes port 25 in this circumstance.
6476 21. Added the -t option to exigrep.
6478 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6479 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6480 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6481 them is set, LOOKUP_LSEARCH is forced.
6483 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6485 24. Added sender and host information to the "rejected by local_scan()" log
6486 line; previously there was no indication of these.
6488 25. Added .include_if_exists.
6490 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6491 Linux. It turns out that not all file systems support this. Apparently some
6492 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6493 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6494 not supported on the file descriptor, is now ignored when Exim is trying to
6495 sync a directory. This applies only to Linux.
6497 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6499 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6500 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6503 29. Added support for maildirsize files from supplied patch (modified a bit).
6505 30. The use of :fail: followed by an empty string could lead Exim to respond to
6506 sender verification failures with (e.g.):
6508 550 Verification failed for <xxx>
6509 550 Sender verify failed
6511 where the first response line was missing the '-' that indicates it is not
6512 the final line of the response.
6514 31. The loop for finding the name of the user that called Exim had a hardwired
6515 limit of 10; it now uses the value of finduser_retries, which is used for
6516 all other user lookups.
6518 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6521 33. Exim was neglecting to zero errno before one call of strtol() when
6522 expanding a string and expecting an integer value. On some systems this
6523 resulted in spurious "integer overflow" errors. Also, it was casting the
6524 result into an int without checking.
6526 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6527 did not work. The code looks as if it has *never* worked, though it appears
6528 to have been documented since at least release 1.62. I have made it work.
6530 35. The "timeout_DNS" error in retry rules, also documented since at least
6531 1.62, also never worked. As it isn't clear exactly what this means, and
6532 clearly it isn't a major issue, I have abolished the feature by treating it
6533 as "timeout", and writing a warning to the main and panic logs.
6535 36. The display of retry rules for -brt wasn't always showing the error code
6538 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6539 timeout_connect_A, timeout_connect_MX.
6541 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6542 to the empty sender.
6544 39. The daemon was not analysing the content of -oX till after it had closed
6545 stderr and disconnected from the controlling terminal. This meant that any
6546 syntax errors were only noted on the panic log, and the return code from
6547 the command was 0. By re-arranging the code a little, I've made the
6548 decoding happen first, so such errors now appear on stderr, and the return
6549 code is 1. However, the actual setting up of the sockets still happens in
6550 the disconnected process, so errors there are still only recorded on the
6553 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6554 connections (as happens on some IP stacks) was logged at start up time as
6555 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6556 it from "IPv6 and IPv4", which means that two separate sockets are being
6559 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6560 says whether AF_INET or AF_INET6 was passed as an argument.
6562 42. Exiwhat output was messed up when time zones were included in log
6565 43. Exiwhat now gives more information about the daemon's listening ports,
6566 and whether -tls-on-connect was used.
6568 44. The "port" option of the smtp transport is now expanded.
6570 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6571 silently ignored. Now an error message is written to the main and panic
6574 46. There's a new ACL modifier called "logwrite" which writes to a log file
6575 as soon as it is encountered.
6577 47. Added $local_user_uid and $local_user_gid at routing time.
6579 48. Exim crashed when trying to verify a sender address that was being
6582 49. Exim was recognizing only a space character after ".include". It now also
6583 recognizes a tab character.
6585 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6586 extracting the relevant information from the specification. The man page no
6587 longer contains scrambled data for the -d option, and I've added a section
6588 at the front about calling Exim under different names.
6590 51. Added "extra_headers" argument to the "mail" command in filter files.
6592 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6595 53. Installed eximstats 1.29.
6597 54. Added transport_filter_timeout as a generic transport option.
6599 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6600 Cc: header lines. This was required by RFC 822, but it not required by RFC
6603 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6604 incoming messages that did not have them. Now it does so only if the
6605 message originates locally, that is, if there is no associated remote host
6606 address. When Resent- header lines are present, this applies to the Resent-
6607 lines rather than the non-Resent- lines.
6609 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6610 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6612 58. Messages for configuration errors now include the name of the main
6613 configuration file - useful now that there may be more than one file in a
6614 list (.included file names were always shown).
6616 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6617 for those rare installations that do not start the daemon as root or run it
6618 setuid root. I've cut out the call to initgroups() if the daemon is not
6621 60. The Exim user and group can now be bound into the binary as text strings
6622 that are looked up at the start of Exim's processing.
6624 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6626 62. Added $mailstore_basename variable.
6628 63. Installed patch to sieve.c from Michael Haardt.
6630 64. When Exim failed to open the panic log after failing to open the main log,
6631 the original message it was trying to log was written to stderr and debug
6632 output, but if they were not available (the usual case in production), it
6633 was lost. Now it is written to syslog before the two lines that record the
6634 failures to open the logs.
6636 65. Users' Exim filters run in subprocesses under the user's uid. It is
6637 possible for a "deliver" command or an alias in a "personal" command to
6638 provoke an address rewrite. If logging of address rewriting is configured,
6639 this fails because the process is not running as root or exim. There may be
6640 a better way of dealing with this, but for the moment (because 4.30 needs
6641 to be released), I have disabled address rewrite logging when running a
6642 filter in a non-root, non-exim process.
6648 1. The buildconfig auxiliary program wasn't quoting the value set for
6649 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6650 not defined. This bug was masked in 4.22 by the effect that was fixed in
6653 2. Some messages that were rejected after a message id was allocated were
6654 shown as "incomplete" by exigrep. It no longer does this for messages that
6655 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6657 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6658 have allow_domain_literals set, the ID did not get logged in the <= line.
6659 Domain literals are now always recognized in Message-ID: header lines.
6661 4. The first argument for a ${extract expansion item is the key name or field
6662 number. Leading and trailing spaces in this item were not being ignored,
6663 causing some misleading effects.
6665 5. When deliver_drop_privilege was set, single queue runner processes started
6666 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6667 same command in the process it spins off) were not dropping privilege.
6669 6. When the daemon running as "exim" started a queue runner, it always
6670 re-executed Exim in the spun-off process. This is a waste of effort when
6671 deliver_drop_privilege is set. The new process now just calls the
6672 queue-runner function directly.
6678 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6681 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6682 ignored. Though the use of -oP was forcing the writing of a pid file, it
6683 was always written to the default place.
6685 3. If the message "no IP address found for host xxxx" is generated during
6686 incoming verification, it is now followed by identification of the incoming
6687 connection (so you can more easily find what provoked it).
6689 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6691 5. Added some features to "harden" Exim a bit more against certain attacks:
6693 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6694 be put in Local/Makefile. This is like the never_users runtime option,
6695 but it cannot be overridden. The default setting is "root".
6697 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6698 prefix string with which any file named in a -C command line option
6701 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6702 is retained for -C and -D only if the caller of Exim is root. Without
6703 it, the exim user may also use -C and -D and retain privilege.
6705 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6706 command line option is disabled.
6708 6. Macro names set by the -D option must start with an upper case letter, just
6709 like macro names defined in the configuration file.
6711 7. Added "dereference=" facility to LDAP.
6713 8. Two instances of the typo "uknown" in the source files are fixed.
6715 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6716 the Configure-Makefile script screwed up while processing it.
6718 10. Incorporated PCRE 4.4.
6720 11. The SMTP synchronization check was not operating right at the start of an
6721 SMTP session. For example, it could not catch a HELO sent before the client
6722 waited for the greeting. There is now a check for outstanding input at the
6723 point when the greeting is written. Because of the duplex, asynchronous
6724 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6725 way, but not yet received, when the check is performed.
6727 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6728 on TCP/IP sockets, because this apparently causes some broken clients to
6731 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6732 unchanged) from the Cygwin maintainer.
6734 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6735 was supported instead of testing for mbx. Effectively a typo.
6737 15. The spa authenticator server code was not checking that the input it
6738 received was valid base64.
6740 16. The debug output line for the "set" modifier in ACLs was not showing the
6741 name of the variable that was being set.
6743 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6745 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6746 lookup on its own. Something else was needed to trigger the lookup. For
6747 example, a match in host_lookup or the need for a host name in a host list.
6748 Now, if $sender_host_name is referenced and the host name has not yet been
6749 looked up, a lookup is performed. If the lookup fails, the variable remains
6750 empty, and $host_lookup_failed is set to "1".
6752 19. Added "eqi" as a case-independent comparison operator.
6754 20. The saslauthd authentication condition could segfault if neither service
6755 nor realm was specified.
6757 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6758 error message that was logged was misleading, and incoming SMTP
6759 connections were dropped. The message is now more accurate, and temporary
6760 errors are given to SMTP connections.
6762 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6763 (except RSET) with a 421 error, until QUIT is received. However, it was
6764 failing to send a response to QUIT.
6766 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6767 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6768 ACL is now run after the helo_try_verify_hosts code.
6770 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6771 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6772 case-independent, so other case variants are also recognized). Apparently
6773 some systems use these upper case variants.
6775 25. If more than two messages were waiting for the same host, and a transport
6776 filter was specified for the transport, Exim sent two messages over the
6777 same TCP/IP connection, and then failed with "socket operation on non-
6778 socket" when it tried to send the third.
6780 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6782 27. The extern definition of crypt16() in expand.c was not being excluded when
6783 the OS had its own crypt16() function.
6785 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6786 as a preferred synonym for return_size_limit, both as an option and as an
6789 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6791 30. Changed the default configuration ACL to relax the local part checking rule
6792 for addresses that are not in any local domains. For these addresses,
6793 slashes and pipe symbols are allowed within local parts, but the sequence
6794 /../ is explicitly forbidden.
6796 31. SPA server authentication was not clearing the challenge buffer before
6799 32. log_message in a "warn" ACL statement was writing to the reject log as
6800 well as to the main log, which contradicts the documentation and doesn't
6801 seem right (because no rejection is happening). So I have stopped it.
6803 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6804 However, I am unable to do any testing of this.
6806 34. Fixed an infelicity in the appendfile transport. When checking directories
6807 for a mailbox, to see if any needed to be created, it was accidentally
6808 using path names with one or more superfluous leading slashes; tracing
6809 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6811 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6812 contents are added to the log line that is written for every discarded
6813 recipient. (Previously a log_message setting was ignored.)
6815 36. The ${quote: operator now quotes the string if it is empty.
6817 37. The install script runs exim in order to find its version number. If for
6818 some reason other than non-existence or emptiness, which it checks, it
6819 could not run './exim', it was installing it with an empty version number,
6820 i.e. as "exim-". This error state is now caught, and the installation is
6823 38. An argument was missing from the function that creates an error message
6824 when Exim fails to connect to the socket for saslauthd authentication.
6825 This could cause Exim to crash, or give a corrupted message.
6827 39. Added isip, isip4, and isip6 to ${if conditions.
6829 40. The ACL variables $acl_xx are now saved with the message, and can be
6830 accessed later in routers, transports, and filters.
6832 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6833 strings in the file are not string-expanded.
6835 42. If a MAIL command specified a SIZE value that was too large to fit into an
6836 int variable, the check against message_size_limit failed. Such values are
6837 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6838 day this will have to be increased, but I don't think I want to be around
6839 when emails are that large.
6846 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6847 iconv() is not standard in FreeBSD.
6849 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6850 IPv6 enabled. The observed symptom was a segmentation fault on return from
6851 the function os_common_find_running_interfaces() in src/os.c.
6853 3. In the check_special_case() function in daemon.c I had used "errno" as an
6854 argument name, which causes warnings on some systems. This was basically a
6855 typo, since it was named "eno" in the comments!
6857 4. The code that waits for the clock to tick (at a resolution of some fraction
6858 of a second) so as to ensure message-id uniqueness was always waiting for
6859 at least one whole tick, when it could have waited for less. [This is
6860 almost certainly not relevant at current processor speeds, where it is
6861 unlikely to ever wait at all. But we try to future-proof.]
6863 5. The function that sleeps for a time interval that includes fractions of a
6864 second contained a race. It did not block SIGALRM between setting the
6865 timer, and suspending (a couple of lines later). If the interval was short
6866 and the sigsuspend() was delayed until after it had expired, the suspension
6867 never ended. On busy systems this could lead to processes getting stuck for
6870 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6871 process, before it forks any delivery processes. The open lookup caching
6872 mechanism meant that the open file or database connection was passed into
6873 the delivery process. The problem was that delivery processes always tidy
6874 up cached lookup data. This could cause a problem for the next delivery
6875 process started by the queue runner, because the external queue runner
6876 process does not know about the closure. So the next delivery process
6877 still has data in the lookup cache. In the case of a file lookup, there was
6878 no problem because closing a file descriptor in a subprocess doesn't affect
6879 the parent. However, if the lookup was caching a connection to a database,
6880 the connection was closed, and the second delivery process was likely to
6881 see errors such as "PGSQL: query failed: server closed the connection
6882 unexpectedly". The problem has been fixed by closing all cached lookups
6883 in a queue runner before running a delivery process.
6885 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6886 seem to have the "const" qualifier which it has on other OS. I've
6889 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6890 *of the same type* (client or server) with the same public name that an
6891 error should be diagnosed.
6893 9. When Exim looked up a host name for an IP address, but failed to find the
6894 original IP address when looking up the host name (a safety check), it
6895 output the message "<ip address> does not match any IP for NULL", which was
6896 confusing, to say the least. The bug was that the host name should have
6897 appeared instead of "NULL".
6899 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6900 user that is built into the binary, and the -C or -D options is used, root
6901 privilege is dropped before the configuration file is read. In addition,
6902 logging is switched to stderr instead of the normal log files. If the
6903 configuration then re-defines the Exim user, the unprivileged environment
6904 is probably not what is expected, so Exim logs a panic warning message (but
6907 However, if deliver_drop_privilege is set, the unprivileged state may well
6908 be exactly what is intended, so the warning has been cut out in that case,
6909 and Exim is allowed to try to write to its normal log files.
6915 1. smtp_return_error_details was not giving details for temporary sender
6916 or receiver verification errors.
6918 2. Diagnose a configuration error if two authenticators have the same public
6921 3. Exim used not to create the message log file for a message until the first
6922 delivery attempt. This could be confusing when incoming messages were held
6923 for policy or load reasons. The message log file is now created at the time
6924 the message is received, and an initial "Received" line is written to it.
6926 4. The automatically generated man page for command line options had a minor
6927 bug that caused no ill effects; however, a more serious problem was that
6928 the procedure for building the man page automatically didn't always
6929 operate. Consequently, release 4.20 contains an out-of-date version. This
6930 shouldn't happen again.
6932 5. When building Exim with embedded Perl support, the script that builds the
6933 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6934 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6936 6. The freeze_tell option was not being used for messages that were frozen on
6937 arrival, either by an ACL or by local_scan().
6939 7. Added the smtp_incomplete_transaction log selector.
6941 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6942 was accepting AUTH without a new EHLO.
6944 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6945 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6948 10. Logging of TCP/IP connections (when configured) now happens in the main
6949 daemon process instead of the child process, so that the TCP/IP connection
6950 count is more accurate (but it can never be perfect).
6952 11. The use of "drop" in a nested ACL was not being handled correctly in the
6953 outer ACL. Now, if condition failure induced by the nested "drop" causes
6954 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6955 or "require"), the connection is dropped.
6957 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6958 that yield "discard" can now be used with an "accept" or a "discard" verb,
6959 but an error is generated for any others (because I can't see a useful way
6960 to define what should happen).
6962 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6963 are now processed in the same way as lines in the Exim configuration file.
6964 In particular, continuation lines are supported.
6966 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6968 15. Added -ti meaning -t -i.
6970 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6971 domains, and warn by logging if others are found.
6973 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6974 returned from GIFCONF when Exim is trying to find the list of interfaces on
6975 a host. The code in os.c has been modified to copy each ifreq to an aligned
6976 structure in all cases.
6978 Also, in some cases, the returned ifreq's were being copied to a 'struct
6979 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6980 means the last couple of bytes of an IPv6 address could be chopped if the
6981 ifreq contained only a normal sockaddr (14 bytes storage).
6983 18. Named domain lists were not supported in the hosts_treat_as_local option.
6984 An entry such as +xxxx was not recognized, and was treated as a literal
6987 19. Ensure that header lines added by a DATA ACL are included in the reject log
6988 if the ACL subsequently rejects the message.
6990 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6991 MD5 (which is deprecated).
6993 21. When testing a filter file using -bf, Exim was writing a message when it
6994 took the sender from a "From " line in the message, but it was not doing so
6995 when it took $return_path from a Return-Path: header line. It now does.
6997 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6998 with a valid header line field name (a series of printing characters
6999 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7001 23. Changed "disc" in the source to "disk" to conform to the documentation and
7002 the book and for uniformity.
7004 24. Ignore Sendmail's -Ooption=value command line item.
7006 25. When execve() failed while trying to run a command in a pipe transport,
7007 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7008 could be confused with a return value of 69 from the command itself. This
7009 has been changed to 127, the value the shell returns if it is asked to run
7010 a non-existent command. The wording for the related log line suggests a
7011 non-existent command as the problem.
7013 26. If received_header_text expands to an empty string, do not add a Received:
7014 header line to the message. (Well, it adds a token one on the spool, but
7015 marks it "old" so that it doesn't get used or transmitted.)
7017 27. Installed eximstats 1.28 (addition of -nt option).
7019 28. There was no check for failure on the call to getsockname() in the daemon
7020 code. This can fail if there is a shortage of resources on the system, with
7021 ENOMEM, for example. A temporary error is now given on failure.
7023 29. Contrary to the C standard, it seems that in some environments, the
7024 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7025 program. Exim now does this explicitly; it affects the formatting of
7026 timestamps using strftime().
7028 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7029 complaints. I've now initialized all the variables, to avoid this.
7031 32. Header lines added by a system filter were not being "seen" during
7032 transport-time rewrites.
7034 33. The info_callback() function passed to OpenSSL is set up with type void
7035 (*)(SSL *, int, int), as described somewhere. However, when calling the
7036 function (actually a macro) that sets it up, the type void(*)() is
7037 expected. I've put in a cast to prevent warnings from picky compilers.
7039 34. If a DNS black list lookup found a CNAME record, but there were no A
7040 records associated with the domain it pointed at, Exim crashed.
7042 35. If a DNS black list lookup returned more than one A record, Exim ignored
7043 all but the first. It now scans all returned addresses if a particular IP
7044 value is being sought. In this situation, the contents of the
7045 $dnslist_value variable are a list of all the addresses, separated by a
7048 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7049 to accept a host name and all its aliases if the forward lookup for any of
7050 them yielded the IP address of the incoming connection. Now it accepts only
7051 those names whose forward lookup yields the correct IP address. Any other
7052 names are discarded. This closes a loophole whereby a rogue DNS
7053 administrator could create reverse DNS records to break through a
7054 wildcarded host restriction in an ACL.
7056 37. If a user filter or a system filter that ran in a subprocess used any of
7057 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7058 the wrong values were passed to the pipe command ($thisaddress had the
7059 value of $0, $0 had the value of $1, etc). This bug was introduced by
7060 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7062 38. Improved the line breaking for long SMTP error messages from ACLs.
7063 Previously, if there was no break point between 40 and 75 characters, Exim
7064 left the rest of the message alone. Two changes have been made: (a) I've
7065 reduced the minimum length to 35 characters; (b) if it can't find a break
7066 point between 35 and 75 characters, it looks ahead and uses the first one
7067 that it finds. This may give the occasional overlong line, but at least the
7068 remaining text gets split now.
7070 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7071 file descriptors might be low, and that setting 1000 would always raise it.
7072 It turns out that in some environments, the limit is already over 1000 and
7073 that lowering it causes trouble. So now Exim takes care not to decrease it.
7075 40. When delivering a message, the value of $return_path is set to $sender_
7076 address at the start of routing (routers may change the value). By an
7077 oversight, this default was not being set up when an address was tested by
7078 -bt or -bv, which affected the outcome if any router or filter referred to
7081 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7082 log only when "message" or "log_message" are set. However, if one of the
7083 conditions was an address verification, or a call to a nested ACL, the
7084 messages generated by the underlying test were being passed through. This
7085 no longer happens. The underlying message is available in $acl_verify_
7086 message for both "message" and "log_message" expansions, so it can be
7087 passed through if needed.
7089 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7090 new expansion $bh_ to give the encoded byte string without charset
7091 translation. Translation happens only if iconv() is available; HAVE_ICONV
7092 indicates this at build time. HEADERS_CHARSET gives the charset to
7093 translate to; headers_charset can change it in the configuration, and
7094 "headers charset" can change it in an individual filter file.
7096 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7097 that creates RFC 2047 encoded "words" labels them as that charset instead
7098 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7099 expansion operator; (ii) when Exim creates a From: line for a local
7100 message; (iii) when a header line is rewritten to include a "phrase" part.
7102 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7103 buggy, causing it to skip the first lines of messages whose message ID
7104 ended in 'D'. This would not have bitten before Exim release 4.14, because
7105 message IDs were unlikely to end in 'D' before then. The effect was to have
7106 incorrect size information for certain domains.
7108 45. #include "config.h" was missing at the start of the crypt16.c module. This
7109 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7112 46. If there was a timeout during a "random" callout check, Exim treated it as
7113 a failure of the random address, and carried on sending RSET and the real
7114 address. If the delay was just some slowness somewhere, the response to the
7115 original RCPT would be taken as a response to RSET and so on, causing
7116 mayhem of various kinds.
7118 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7119 when I implemented it. It didn't allow for the fact that some option values
7120 may legitimately be negative (e.g. size_addition), and it didn't even do
7121 the right test for positive values.
7123 48. Domain names in DNS records are case-independent. Exim always looks them up
7124 in lower case. Some resolvers return domain names in exactly the case they
7125 appear in the zone file, that is, they may contain uppercase letters. Not
7126 all resolvers do this - some return always lower case. Exim was treating a
7127 change of case by a resolver as a change of domain, similar to a widening
7128 of a domain abbreviation. This triggered its re-routing code and so it was
7129 trying to route what was effectively the same domain again. This normally
7130 caused routing to fail (because the router wouldn't handle the domain
7131 twice). Now Exim checks for this case specially, and just changes the
7132 casing of the domain that it ultimately uses when it transmits the message
7135 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7138 50. If a filter generated a file delivery with a non-absolute name (possible if
7139 no home directory exists for the router), the forbid_file option was not
7142 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7143 the existing equality matching.
7145 52. Exim was using ints instead of ino_t variables in some places where it was
7146 dealing with inode numbers.
7148 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7149 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7150 called TMPDIR, and if it finds it is different, it changes its value.
7152 54. The smtp_printf() function is now made available to local_scan() so
7153 additional output lines can be written before returning. There is also an
7154 smtp_fflush() function to enable the detection of a dropped connection.
7155 The variables smtp_input and smtp_batched_input are exported to
7158 55. Changed the default runtime configuration: the message "Unknown user"
7159 has been removed from the ACL, and instead placed on the localuser router,
7160 using the cannot_route_message feature. This means that any verification
7161 failures that generate their own messages won't get overridden. Similarly,
7162 the "Unrouteable address" message that was in the ACL for unverifiable
7163 relay addresses has also been removed.
7165 56. Added hosts_avoid_esmtp to the smtp transport.
7167 57. The exicyclog script was not checking for the esoteric option
7168 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7169 will work only if exicyclog is run under the appropriate euid.
7171 58. Following a discussion on the list, the rules by which Exim recognises line
7172 endings on incoming messages have been changed. The -dropcr and drop_cr
7173 options are now no-ops, retained only for backwards compatibility. The
7174 following line terminators are recognized: LF CRLF CR. However, special
7175 processing applies to CR:
7177 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7178 nor a local message in the state where . is a terminator.
7180 (ii) If a bare CR is encountered in a header line, an extra space is added
7181 after the line terminator so as not to end the header. The reasoning
7182 behind this is that bare CRs in header lines are most likely either
7183 to be mistakes, or people trying to play silly games.
7185 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7186 was being incorrectly given as 18 bytes larger than it should have been.
7187 This is a VOB (very old bug).
7189 60. This may never have affected anything current, but just in case it has:
7190 When the local host is found other than at the start of a list of hosts,
7191 the local host, those with the same MX, and any that follow, are discarded.
7192 When the list in question was part of a longer list of hosts, the following
7193 hosts (not currently being processed) were also being discarded. This no
7194 longer happens. I'm not sure if this situation could ever has previously
7197 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7200 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7201 header. This is something that is recommended in a new Internet Draft, and
7202 is something that is documented as being done by Sendmail. There are two
7203 possible values. For messages generated by the autoreply transport, Exim
7206 Auto-Submitted: auto-replied
7208 whereas for all other generated messages (e.g. bounces) it adds
7210 Auto-Submitted: auto-generated
7212 63. The "personal" condition in filters now includes a test for the
7213 Auto-Submitted: header. If it contains the string "auto-" the message it
7214 not considered personal.
7216 64. Added rcpt_include_affixes as a generic transport option.
7218 65. Added queue_only_override (default true).
7220 66. Added the syslog_duplication option.
7222 67. If what should have been the first header line of a message consisted of
7223 a space followed by a colon, Exim was mis-interpreting it as a header line.
7224 It isn't of course - it is syntactically invalid and should therefore be
7225 treated as the start of the message body. The misbehaviour could have
7226 caused a number of strange effects, including loss of data in subsequent
7227 header lines, and spool format errors.
7229 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7230 client host had authenticated. This control can now be exercised by an ACL
7231 for more flexibility.
7233 69. By default, callouts do not happen when testing with -bh. There is now a
7234 variant, -bhc, which does actually run the callout code, including
7235 consulting and updating the callout cache.
7237 70. Added support for saslauthd authentication, courtesy of Alexander
7240 71. If statvfs() failed on the spool or log directories while checking their
7241 size for availability, Exim confusingly gave the error "space shortage".
7242 Furthermore, in debugging mode it crashed with a floating point exception.
7243 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7244 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7245 serious problem, Exim now writes to the main and panic logs when this
7246 happens, with details of the failure. It then refuses to accept the
7247 incoming message, giving the message "spool directory problem" or "log
7248 directory problem" with a 421 code for SMTP messages.
7250 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7251 0, 1, and 2 exist, because some OS complain for execs without them (see
7252 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7253 descriptors. However, the code omitted to check that the open succeeded,
7254 causing mysterious errors if for some reason the permissions on /dev/null
7255 got screwed. Now Exim writes a message to the main and panic logs, and
7256 bombs out if it can't open /dev/null.
7258 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7259 interact so that it is all more flexible. It is supposed to remain
7260 backwards compatible. Also added extra_local_interfaces.
7262 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7263 to bomb out with an assertion failure - to the client this appears as a
7264 connection drop. This problem occurs in the part of the code that was taken
7265 from the Samba project. Fortunately, the assertion is in a very simple
7266 function, so I have fixed this by reproducing the function inline in the
7267 one place where it is called, and arranging for authentication to fail
7268 instead of killing the process with assert().
7270 75. The SPA client code was not working when the server requested OEM rather
7271 than Unicode encoding.
7273 76. Added code to make require_files with a specific uid setting more usable in
7274 the case where statting the file as root fails - usually a non-root-mounted
7275 NFS file system. When this happens and the failure is EACCES, Exim now
7276 forks a subprocess and does the per-uid checking as the relevant uid.
7278 77. Added process_log_path.
7280 78. If log_file_path was not explicitly set, a setting of check_log_space or
7281 check_log_inodes was ignored.
7283 79. If a space check for the spool or log partitions fails, the incident is now
7284 logged. Of course, in the latter case the data may get lost...
7286 80. Added the %p formatting code to string_format() so that it can be used to
7287 print addresses in debug_print(). Adjusted all the address printing in the
7288 debugging in store.c to use %p rather than %d.
7290 81. There was a concern that a line of code in smtp_in.c could overflow a
7291 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7292 initially expressed, the concern was not well-founded, because trailing
7293 spaces are removed early. However, if the trailing spaces were followed by
7294 a NULL, they did not get removed, so the overflow was possible. Two fixes
7297 (a) I re-wrote the offending code in a cleaner fashion.
7298 (b) If an incoming SMTP command contains a NULL character, it is rejected
7301 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7302 runs initgroups(), so that if the Exim user is in any additional groups,
7303 they will be used during message reception.
7309 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob