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.
10 HS/01 Handle trailing backslash gracefully. (CVE-2019-15846)
16 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917, OVE-20190718-0006)
22 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
23 buffer overrun for (non-chunking) other transports.
25 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
26 TLS1.3, means that a server rejecting a client certificate is not visible
27 to the client until the first read of encrypted data (typically the
28 response to EHLO). Add detection for that case and treat it as a failed
29 TLS connection attempt, so that the normal retry-in-clear can work (if
32 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
33 and/or domain. Found and fixed by Jason Betts.
35 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
36 configuration). If a CNAME target was not a wellformed name pattern, a
43 JH/01 Remove code calling the customisable local_scan function, unless a new
44 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
46 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
47 non-signal-safe functions being used.
49 JH/03 Bug 2269: When presented with a received message having a stupidly large
50 number of DKIM-Signature headers, disable DKIM verification to avoid
51 a resource-consumption attack. The limit is set at twenty.
53 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
54 report of oldest_pass in ${authres } in consequence, and separate out
55 some descriptions of reasons for verification fail.
57 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
58 files in the spool were present and unlocked. A queue-runner could spot
59 them, resulting in a duplicate delivery. Fix that by doing the unlock
60 after the unlink. Investigation by Tim Stewart. Take the opportunity to
61 add more error-checking on spoolfile handling while that code is being
64 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
65 No known attacks, no CVE, this is defensive hardening.
67 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
68 a queue-runner could start a delivery while other operations were ongoing.
69 Cutthrough delivery was a common victim, resulting in duplicate delivery.
70 Found and investigated by Tim Stewart. Fix by using the open message data
71 file handle rather than opening another, and not locally closing it (which
72 releases a lock) for that case, while creating the temporary .eml format
73 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
75 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
76 $sender_verify_failure/$recipient_verify_failure to "random".
78 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
81 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
82 Previously this would segfault.
84 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
87 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
88 like zero, since the resolver should be doing this for us, But we need one
89 as a CNAME but no MX presence gets the CNAME returned; we need to check
90 that doesn't point to an MX to declare it "no MX returned" rather than
91 "error, loop". A new main option is added so the older capability of
92 following some limited number of chain links is maintained.
94 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
96 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
97 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
98 now-deprecated earlier definitions used only specified the range up to TLS
99 1.2 (in the older-version library docs).
101 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
103 JH/15 Rework TLS client-side context management. Stop using a global, and
104 explicitly pass a context around. This enables future use of TLS for
105 connections to service-daemons (eg. malware scanning) while a client smtp
106 connection is using TLS; with cutthrough connections this is quite likely.
108 JH/16 Fix ARC verification to do AS checks in reverse order.
110 JH/17 Support a "tls" option on the ${readsocket } expansion item.
112 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
113 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
114 Previously the "utf8" would be re-prepended for every additional message.
116 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
117 Previously thery were accepted, resulting in issues when attempting to
118 forward messages to a non-supporting MTA.
120 PP/02 Let -n work with printing macros too, not just options.
122 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
123 one parent address was copied, and bogus data was used at delivery-logging
124 time. Either a crash (after delivery) or bogus log data could result.
125 Discovery and analysis by Tim Stewart.
127 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
128 Previously if the string ended mid-character, we did not insert the
129 promised '?' replacement.
131 PP/04 Documentation: current string operators work on bytes, not codepoints.
133 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
134 should pack well giving a smaller memory footprint so better caching and
135 therefore performance. Group the declarations where this can't be done so
136 that the byte-sized flag variables are not interspersed among pointer
137 variables, giving a better chance of good packing by the compiler.
139 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
140 non-null, to avoid issues with sites running BATV. Previously reports were
141 sent with an empty envelope sender so looked like bounces.
143 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
144 The ignore_error flag wasn't being returned from the filter subprocess so
145 was not set for later routers. Investigation and fix by Matthias Kurz.
147 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
148 and a msg:complete for the whole, when a message is manually removed using
149 -Mrm. Developement by Matthias Kurz, hacked on by JH.
151 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
152 a "Gnu special" function, asprintf() in the DB utility binary builds; I
153 hope that is portable enough.
155 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
156 requiring a known-CA anchor certificate; make it now rely entirely on the
157 TLSA as an anchor. Checking the name on the leaf cert against the name
158 on the A-record for the host is still done for TA (but not for EE mode).
160 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
161 included in delivery lines for non-proxied connections, when compiled with
162 SUPPORT_SOCKS and running with proxy logging enabled.
164 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
165 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
166 move the existing event to fire before the normal logging of message
167 failure so that custom logging is bracketed by normal logging.
169 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
170 msg:fail:internal event. Developement by Matthias Kurz.
172 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
173 far too small for todays use of crypto signatures stored there. Go all
174 the way to the max DNS message size of 64kB, even though this might be
175 overmuch for IOT constrained device use.
177 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
178 copy a string over itself. The library routine is documented as not
179 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
181 JH/32 For main options check_spool_space and check_inode_space, where the
182 platform supports 64b integers, support more than the previous 2^31 kB
183 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
184 the previous G, M, k.
186 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
187 $authenticated_fail_id variable on authentication failure. Previously
190 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
191 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
192 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
193 GNUTLS_SEC_PARAM_MEDIUM.
195 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
196 side. Previously we would continue as if no SNI had been received.
198 JH/36 Harden the handling of string-lists. When a list consisted of a sole
199 "<" character, which should be a list-separator specification, we walked
200 off past the nul-terimation.
202 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
203 causes) even when the retry time is not yet met. Previously they were
204 not, meaning that when (say) an account was over-quota and temp-rejecting,
205 and multiple senders' messages were queued, only one sender would get
206 notified on each configured delay_warning cycle.
208 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
210 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
211 cipher-suites, an error can be left on the stack even for a succeeding
212 accept; this results in impossible error messages when a later operation
215 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
216 return error codes indicating retry. Under TLS1.3 this becomes required.
218 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
219 it only wrote the new authenticators, resulting in a lack of tracking of
220 peer changes of ESMTP extensions until the next cache flush.
222 JH/41 Fix the loop reading a message header line to check for integer overflow,
223 and more-often against header_maxsize. Previously a crafted message could
224 induce a crash of the recive process; now the message is cleanly rejected.
226 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
227 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
233 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
234 When redis_servers is set to a list of > 1 element, and the Redis servers
235 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
236 case of MOVED into a DEFER case instead, thus moving the query onto the
237 next server in the list. For a cluster of N elements, all N servers must
238 be defined in redis_servers.
240 GF/02 Catch and remove uninitialized value warning in exiqsumm
241 Check for existence of @ARGV before looking at $ARGV[0]
243 JH/01 Replace the store_release() internal interface with store_newblock(),
244 which internalises the check required to safely use the old one, plus
245 the allocate and data copy operations duplicated in both (!) of the
246 extant use locations.
248 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
249 modifier. This matches the restriction on the commandline.
251 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
252 Previously only the last row was returned.
254 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
255 we assumed that tags in the header were well-formed, and parsed the
256 element content after inspecting only the first char of the tag.
257 Assumptions at that stage could crash the receive process on malformed
260 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
261 While running the DKIM ACL we operate on the Permanent memory pool so that
262 variables created with "set" persist to the DATA ACL. Also (at any time)
263 DNS lookups that fail create cache records using the Permanent pool. But
264 expansions release any allocations made on the current pool - so a dnsdb
265 lookup expansion done in the DKIM ACL releases the memory used for the
266 DNS negative-cache, and bad things result. Solution is to switch to the
267 Main pool for expansions.
268 While we're in that code, add checks on the DNS cache during store_reset,
269 active in the testsuite.
270 Problem spotted, and debugging aided, by Wolfgang Breyha.
272 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
273 When none of the hosts presented to a transport match an already-open
274 connection, close it and proceed with the list. Previously we would
275 queue the message. Spotted by Lena with Yahoo, probably involving
278 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
279 Previously a spurious "250 OK id=" response was appended to the proper
282 JH/08 The "support for" informational output now, which built with Content
283 Scanning support, has a line for the malware scanner interfaces compiled
284 in. Interface can be individually included or not at build time.
286 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
287 by the template makefile "src/EDITME". The "STREAM" support for an older
288 ClamAV interface method is removed.
290 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
291 rows affected is given instead).
293 JH/11 The runtime Berkeley DB library version is now additionally output by
294 "exim -d -bV". Previously only the compile-time version was shown.
296 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
297 SMTP connection. Previously, when one had more receipients than the
298 first, an abortive onward connection was made. Move to full support for
299 multiple onward connections in sequence, handling cutthrough connection
300 for all multi-message initiating connections.
302 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
303 routers. Previously, a multi-recipient message would fail to match the
304 onward-connection opened for the first recipient, and cause its closure.
306 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
307 a timeout on read on a GnuTLS initiating connection, resulting in the
308 initiating connection being dropped. This mattered most when the callout
309 was marked defer_ok. Fix to keep the two timeout-detection methods
312 JH/15 Relax results from ACL control request to enable cutthrough, in
313 unsupported situations, from error to silently (except under debug)
314 ignoring. This covers use with PRDR, frozen messages, queue-only and
317 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
319 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
320 metadata, resulting in a crash in free().
322 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
323 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
324 Broken also in d185889f4, with init system revamp.
326 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
327 Previously we abruptly closed the connection after reading a malware-
328 found indication; now we go on to read the "scan ok" response line,
331 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
332 ACL. Previously, a crash would result.
334 JH/19 Speed up macro lookups during configuration file read, by skipping non-
335 macro text after a replacement (previously it was only once per line) and
336 by skipping builtin macros when searching for an uppercase lead character.
338 JH/20 DANE support moved from Experimental to mainline. The Makefile control
339 for the build is renamed.
341 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
342 was allocated for every new TLS startup, meaning one per message. Fix
343 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
345 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
346 reported the original. Fix to report (as far as possible) the ACL
347 result replacing the original.
349 JH/23 Fix memory leak during multi-message connections using STARTTLS under
350 OpenSSL. Certificate information is loaded for every new TLS startup,
351 and the resources needed to be freed.
353 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
355 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
358 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
359 DATA response info to the (existing) per-recipient response info for
360 the "C=" log element. It can have useful tracking info from the
361 destination system. Patch from Simon Arlott.
363 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
364 length value. Previously this would segfault.
366 HS/02 Support Avast multiline protoocol, this allows passing flags to
367 newer versions of the scanner.
369 JH/28 Ensure that variables possibly set during message acceptance are marked
370 dead before release of memory in the daemon loop. This stops complaints
371 about them when the debug_store option is enabled. Discovered specifically
372 for sender_rate_period, but applies to a whole set of variables.
373 Do the same for the queue-runner and queue-list loops, for variables set
374 from spool message files. Do the same for the SMTP per-message loop, for
375 certain variables indirectly set in ACL operations.
377 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
378 as a multi-recipient message from a mailinglist manager). The coding had
379 an arbitrary cutoff number of characters while checking for more input;
380 enforced by writing a NUL into the buffer. This corrupted long / fast
381 input. The problem was exposed more widely when more pipelineing of SMTP
382 responses was introduced, and one Exim system was feeding another.
383 The symptom is log complaints of SMTP syntax error (NUL chars) on the
384 receiving system, and refused recipients seen by the sending system
385 (propating to people being dropped from mailing lists).
386 Discovered and pinpointed by David Carter.
388 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
389 replaced by the ${authresults } expansion.
391 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
393 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
394 allows proper process termination in container environments.
396 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
397 Previously the "final dot" had a newline after it; ensure it is CR,LF.
399 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
400 and "err_perm", deprecated since 4.83 when the RFC-defined words
401 "temperror" and "permerror" were introduced.
403 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
404 transport-filters or DKIM-signing. The restriction was lost in the
405 consolidation of verify-callout and delivery SMTP handling.
406 Extend the restriction to also cover ARC-signing.
408 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
409 in defer=pass mode supply a 450 to the initiator. Previously the message
412 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
413 tls_require_ciphers is used as before.
415 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
416 "pass_unscanned". Only tmpfails from the scanner are written to
417 the paniclog, as they may require admin intervention (permission
418 denied, license issues). Other scanner errors (like decompression
419 bombs) do not cause a paniclog entry.
421 JH/36 Fix reinitialisation of DKIM logging variable between messages.
422 Previously it was possible to log spurious information in receive log
425 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
426 triggered odd behaviour from Outlook Express clients.
428 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
431 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
432 since the IETF WG has not yet settled on that versus the original
433 "bare" representation.
435 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
436 Previously the millisecond value corrupted the output.
437 Fix also for syslog_pid=no and log_selector +pid, for which the pid
438 corrupted the output.
444 JH/01 Rework error string handling in TLS interface so that the caller in
445 more cases is responsible for logging. This permits library-sourced
446 string to be attached to addresses during delivery, and collapses
447 pairs of long lines into single ones.
449 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
450 during configuration. Wildcards are allowed and expanded.
452 JH/02 Rework error string handling in DKIM to pass more info back to callers.
453 This permits better logging.
455 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
456 do not close it down and have the child transport start it up again on
457 the passed-on TCP connection. Instead, proxy the child (and any
458 subsequent ones) for TLS via a unix-domain socket channel. Logging is
459 affected: the continued delivery log lines do not have any DNSSEC, TLS
460 Certificate or OCSP information. TLS cipher information is still logged.
462 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
463 identical IP addresses on different listening ports. Will also affect
466 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
467 add noisy ifdef guards to special-case this sillyness.
468 Patch from Bernd Kuhls.
470 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
471 than 255 are no longer allowed.
473 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
474 Disable the session-cache too, which might reduce our load. Since we
475 currrectly use a new context for every connection, both as server and
476 client, there is no benefit for these.
477 GnuTLS appears to not support tickets server-side by default (we don't
478 call gnutls_session_ticket_enable_server()) but client side is enabled
479 by default on recent versions (3.1.3 +) unless the PFS priority string
482 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
483 <https://reproducible-builds.org/specs/source-date-epoch/>.
485 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
486 the check for any unsuccessful recipients did not notice the limit, and
487 erroneously found still-pending ones.
489 JH/08 Pipeline CHUNKING command and data together, on kernels that support
490 MSG_MORE. Only in-clear (not on TLS connections).
492 JH/09 Avoid using a temporary file during transport using dkim. Unless a
493 transport-filter is involved we can buffer the headers in memory for
494 creating the signature, and read the spool data file once for the
495 signature and again for transmission.
497 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
498 4.77 as the kernel support then wasn't solid, having issues in 64bit
499 mode. Now, it's been long enough. Add support for FreeBSD also.
501 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
502 case where the routing stage had gathered several addresses to send to
503 a host before calling the transport for the first, we previously failed
504 to close down TLS in the old transport process before passing the TCP
505 connection to the new process. The new one sent a STARTTLS command
506 which naturally failed, giving a failed delivery and bloating the retry
507 database. Investigation and fix prototype from Wolfgang Breyha.
509 JH/12 Fix check on SMTP command input synchronisation. Previously there were
510 false-negatives in the check that the sender had not preempted a response
511 or prompt from Exim (running as a server), due to that code's lack of
512 awareness of the SMTP input buffering.
514 PP/04 Add commandline_checks_require_admin option.
515 Exim drops privileges sanely, various checks such as -be aren't a
516 security problem, as long as you trust local users with access to their
517 own account. When invoked by services which pass untrusted data to
518 Exim, this might be an issue. Set this option in main configuration
519 AND make fixes to the calling application, such as using `--` to stop
522 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
523 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
524 responses to those, into a single TLS record each way (this usually means
525 a single packet). As a side issue, smtp_enforce_sync now works on TLS
528 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
529 affects you only if you're dancing at the edge of the param size limits.
530 If you are, and this message makes sense to you, then: raise the
531 configured limit or use OpenSSL 1.1. Nothing we can do for older
534 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
535 cmdline element to get the documented default one. Previously it was
538 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
539 are unsuable for non-message-specific reasons - eg. connection timeout,
540 banner-time rejection.
542 JH/16 Fix logging of delivery remote port, when specified by router, under
545 PP/06 Repair manualroute's ability to take options in any order, even if one
546 is the name of a transport.
549 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
551 JH/17 Change the list-building routines interface to use the expanding-string
552 triplet model, for better allocation and copying behaviour.
554 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
555 Previously it was constructed the first time a possibly-matching string
556 was met in the configuration file input during startup; now it is done
559 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
560 compatible one, to avoid the (poorly documented) possibility of a config
561 file in the working directory redirecting the DB files, possibly correpting
562 some existing file. CVE-2017-10140 assigned for BDB.
564 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
565 cache-hot. Previously, although the result was properly cached, the
566 initial verify call returned a defer.
568 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
569 the main verify for receipient in uncached-mode.
571 JH/22 Retire historical build files to an "unsupported" subdir. These are
572 defined as "ones for which we have no current evidence of testing".
574 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
575 if present. Previously it was ignored.
577 JH/24 Start using specified-initialisers in C structure init coding. This is
578 a C99 feature (it's 2017, so now considered safe).
580 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
581 if was a fixed-sized field and bitmask ops via macros; it is now more
584 PP/07 GitHub PR 56: Apply MariaDB build fix.
585 Patch provided by Jaroslav Škarvada.
587 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
588 during Coverity cleanups [4.87 JH/47]
589 Diagnosis and fix provided by Michael Fischer v. Mollard.
591 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
592 the right size to place the terminating semicolon on its own folded
593 line, the header hash was calculated to an incorrect value thanks to
594 the (relaxed) space the fold became.
596 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
597 and confused the parent.
599 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
600 which could crash as a result. This could lead to undeliverable messages.
602 JH/28 Logging: "next input sent too soon" now shows where input was truncated
605 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
606 matters on fast-turnover and PID-randomising systems, which were getting
607 out-of-order delivery.
609 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
610 a possibly-overlapping copy. The symptom was that "Remote host closed
611 connection in response to HELO" was logged instead of the actual 4xx
614 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
615 Previously only that bufferd was discarded, resulting in SYMTP command
618 JH/32 DKIM: when a message has multiple signatures matching an identity given
619 in dkim_verify_signers, run the dkim acl once for each. Previously only
620 one run was done. Bug 2189.
622 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
623 "panic the current process" to "deliberately defer". The panic log is
624 still written with the problem list name; the mail and reject logs now
625 get a temp-reject line for the message that was being handled, saying
626 something like "domains check lookup or other defer". The SMTP 451
627 message is still "Temporary local problem".
629 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
630 A crafted sequence of BDAT commands could result in in-use memory beeing
631 freed. CVE-2017-16943.
633 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
634 from SMTP input. Previously it was always done; now only done for DATA
635 and not BDAT commands. CVE-2017-16944.
637 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
638 to the message (such as an overlong header line). Previously this was
639 not done and we did not exit BDAT mode. Followon from the previous item
640 though a different problem.
646 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
647 than -2003 did; needs libidn2 in addition to libidn.
649 JH/02 The path option on a pipe transport is now expanded before use.
651 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
652 Patch provided by "Björn", documentation fix added too.
654 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
655 missing a wire-to-host endian conversion.
657 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
658 close after a BDAT command line could be taken as a following command,
659 giving a synch failure. Fix by only checking for synch immediately
660 before acknowledging the chunk.
662 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
663 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
664 macro. Patches provided by Josh Soref.
666 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
667 Previously we did not; the RFC seems ambiguous and VRFY is not listed
668 by IANA as a service extension. However, John Klensin suggests that we
671 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
672 the dkim code may be unix-mode line endings rather than smtp wire-format
673 CRLF, so prepend a CR to any bare LF.
675 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
676 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
678 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
679 the first were themselves being wrongly included in the feed into dkim
680 processing; with most chunk sizes in use this resulted in an incorrect
681 body hash calculated value.
683 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
684 DKIM signature block, for verification. Although advised against by
685 standards it is specifically not ruled illegal.
687 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
689 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
690 missing a body hash (the bh= tag).
692 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
693 It seems that HAProxy sends the Proxy Protocol information in clear and
694 only then does a TLS startup, so do the same.
696 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
697 TCP connections (such as for Spamd) unless the daemon successfully set
698 Fast Open mode on its listening sockets. This fixes breakage seen on
699 too-old kernels or those not configured for Fast Open, at the cost of
700 requiring both directions being enabled for TFO, and TFO never being used
701 by non-daemon-related Exim processes.
703 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
704 endings, at least on the first header line. Try to canonify any that get
705 past that check, despite the cost.
707 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
708 now limited to an arbitrary five deep, while parsing addresses with the
709 strip_excess_angle_brackets option enabled.
711 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
712 instead leave the unprompted TLS handshake in socket buffer for the
713 TLS library to consume.
715 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
717 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
719 JH/16 Drop variables when they go out of scope. Memory management drops a whole
720 region in one operation, for speed, and this leaves assigned pointers
721 dangling. Add checks run only under the testsuite which checks all
722 variables at a store-reset and panics on a dangling pointer; add code
723 explicitly nulling out all the variables discovered. Fixes one known
724 bug: a transport crash, where a dangling pointer for $sending_ip_address
725 originally assigned in a verify callout, is re-used.
727 PP/06 Drop '.' from @INC in various Perl scripts.
729 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
731 PP/08 Reduce a number of compilation warnings under clang; building with
732 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
733 should be warning-free.
735 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
737 HS/01 Fix portability problems introduced by PP/08 for platforms where
738 realloc(NULL) is not equivalent to malloc() [SunOS et al].
740 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
741 chunk. This allows us to accept broken chunked messages. We need a more
742 general solution here.
744 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
745 already-broken messages in the queue.
747 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
749 JH/19 Fix reference counting bug in routing-generated-address tracking.
755 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
756 supports it and a size is available (ie. the sending peer gave us one).
758 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
759 years of being deprecated). The replacements are the ACLs
760 acl_smtp_mime and acl_not_smtp_mime.
762 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
763 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
764 or even an in-clear connection were permitted. Now, if the host lookup
765 was dnssec and dane was requested then the host is only used if the
766 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
767 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
768 if one fails this test.
769 This means that a poorly-configured remote DNS will make it incommunicado;
770 but it protects against a DNS-interception attack on it.
772 JH/04 Bug 1810: make continued-use of an open smtp transport connection
773 non-noisy when a race steals the message being considered.
775 JH/05 If main configuration option tls_certificate is unset, generate a
776 self-signed certificate for inbound TLS connections.
778 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
779 in rewrites and routers.
781 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
782 and logged a warning sing 4.83; now they are a configuration file error.
784 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
785 (lacking @domain). Apply the same qualification processing as RCPT.
787 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
789 JH/10 Support ${sha256:} applied to a string (as well as the previous
792 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
793 a cutthrough deliver is pending, as we always want to make a connection.
794 This also avoids re-routing the message when later placing the cutthrough
795 connection after a verify cache hit.
796 Do not update it with the verify result either.
798 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
799 when routing results in more than one destination address.
801 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
802 signing (which inhibits the cutthrough capability). Previously only
803 the presence of an option was tested; now an expansion evaluating as
804 empty is permissible (obviously it should depend only on data available
805 when the cutthrough connection is made).
807 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
808 the relevant preceding SMTP command did not note the pipelining mode.
810 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
811 Previously they were not counted.
813 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
814 as one having no matching records. Previously we deferred the message
815 that needed the lookup.
817 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
818 distinguished as "(=".
820 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
821 for missing MX records. Previously it only worked for missing A records.
823 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
825 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
826 after the data-go-ahead and data-ack. Patch from Jason Betts.
828 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
829 even for a "none" policy. Patch from Tony Meyer.
831 JH/22 Fix continued use of a connection for further deliveries. If a port was
832 specified by a router, it must also match for the delivery to be
835 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
836 When one of the recipients of a message was unsuitable for the connection
837 (has no matching addresses), we lost track of needing to mark it
838 deferred. As a result mail would be lost.
840 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
842 JH/25 Decoding ACL controls is now done using a binary search; the source code
843 takes up less space and should be simpler to maintain. Merge the ACL
844 condition decode tables also, with similar effect.
846 JH/26 Fix problem with one_time used on a redirect router which returned the
847 parent address unchanged. A retry would see the parent address marked as
848 delivered, so not attempt the (identical) child. As a result mail would
851 JH/27 Fix a possible security hole, wherein a process operating with the Exim
852 UID can gain a root shell. Credit to http://www.halfdog.net/ for
853 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
856 JH/28 Enable {spool,log} filesystem space and inode checks as default.
857 Main config options check_{log,spool}_{inodes,space} are now
858 100 inodes, 10MB unless set otherwise in the configuration.
860 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
861 Previously it only applied to the main-section connection policy
864 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
866 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
867 by me. Added RFC7919 DH primes as an alternative.
869 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
870 are not in the system include path.
872 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
873 GnuTLS, when a session startup failed (eg because the client disconnected)
874 Exim did stdio operations after fclose. This was exposed by a recent
875 change which nulled out the file handle after the fclose.
877 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
878 signed directly by the cert-signing cert, rather than an intermediate
879 OCSP-signing cert. This is the model used by LetsEncrypt.
881 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
883 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
884 an incoming connection.
886 HS/02 Bug 1802: Do not half-close the connection after sending a request
889 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
890 fallback to "prime256v1".
892 JH/34 SECURITY: Use proper copy of DATA command in error message.
893 Could leak key material. Remotely exploitable. CVE-2016-9963.
899 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
900 and 3.4.4 - once the server is enabled to respond to an OCSP request
901 it does even when not requested, resulting in a stapling non-aware
902 client dropping the TLS connection.
904 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
905 support variable-length bit vectors. No functional change.
907 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
908 The I= interface field on outgoing lines is now after the H= remote
909 host field, same as incoming lines. There is a separate
910 outgoing_interface log selector which allows you to disable the
913 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
914 If not running log_selector +smtp_connection the mainlog would be held
915 open indefinitely after a "too many connections" event, including to a
916 deleted file after a log rotate. Leave the per net connection logging
917 leaving it open for efficiency as that will be quickly detected by the
918 check on the next write.
920 HS/01 Bug 1671: Fix post transport crash.
921 Processing the wait-<transport> messages could crash the delivery
922 process if the message IDs didn't exist for some reason. When
923 using 'split_spool_directory=yes' the construction of the spool
924 file name failed already, exposing the same netto behaviour.
926 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
927 mime_regex ACL conditions.
929 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
930 to DSN fail messages (bounces): remote IP, remote greeting, remote response
931 to HELO, local diagnostic string.
933 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
934 log line to debug. Even when configured with a tls authenticator many
935 client connections are expected to not authenticate in this way, so
936 an authenticate fail is not an error.
938 HS/02 Add the Exim version string to the process info. This way exiwhat
939 gives some more detail about the running daemon.
941 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
942 matter for fast-change records such as DNSBLs.
944 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
945 retry record, even if constant. There may be multiple transports with
946 different interface settings and the retry behaviour needs to be kept
949 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
951 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
953 JH/10 Bug 840: fix log_defer_output option of pipe transport
955 JH/11 Bug 830: use same host for all RCPTS of a message, even under
956 hosts_randomize. This matters a lot when combined with mua_wrapper.
958 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
959 ${quote_pgsql:<string>} operator.
961 JH/13 Bug 1708: avoid misaligned access in cached lookup.
963 JH/14 Change header file name for freeradius-client. Relevant if compiling
964 with Radius support; from the Gentoo tree and checked under Fedora.
966 JH/15 Bug 1712: Introduce $prdr_requested flag variable
968 JH/16 Bug 1714: Permit an empty string as expansion result for transport
969 option transport_filter, meaning no filtering.
971 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
973 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
974 defaults to "*" (all hosts). The variable is now available when not built
975 with TLS, default unset, mainly to enable keeping the testsuite sane.
976 If a server certificate is not supplied (via tls_certificate) an error is
977 logged, and clients will find TLS connections fail on startup. Presumably
978 they will retry in-clear.
979 Packagers of Exim are strongly encouraged to create a server certificate
980 at installation time.
982 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
983 with the $config_file variable.
985 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
986 in transport context, after the attempt, and per-recipient. The latter type
987 is per host attempted. The event data is the error message, and the errno
988 information encodes the lookup type (A vs. MX) used for the (first) host,
989 and the trailing two digits of the smtp 4xx response.
991 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
992 to write to mainlog (or rejectlog, paniclog) in the window between file
993 creation and permissions/ownership being changed. Particularly affects
994 installations where exicyclog is run as root, rather than exim user;
995 result is that the running daemon panics and dies.
997 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
999 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1000 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1001 "pri" and "weight". Note that the previous implicit priority given by the
1002 list order is no longer honoured.
1004 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1005 for DKIM processing.
1007 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1008 by defining SUPPORT_SOCKS.
1010 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1011 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1012 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1013 variables are renamed to proxy_{local,external}_{address,port}.
1015 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1016 for a build by defining SUPPORT_I18N
1018 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1019 of the query string, and make ${quote_redis:} do that quoting.
1021 JH/29 Move Events support from Experimental to mainline, enabled by default
1022 and removable for a build by defining DISABLE_EVENT.
1024 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1026 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1027 cached by the daemon.
1029 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1030 by defining LOOKUP_REDIS. The libhiredis library is required.
1032 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1033 keys are given for lookup.
1035 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1036 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1037 only supported when built with TLS support. The PolarSSL SHA routines
1038 are still used when the TLS library is too old for convenient support.
1040 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1041 openssl_options), for security. OpenSSL forces this from version 1.1.0
1042 server-side so match that on older versions.
1044 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1045 allocation for $value could be released as the expansion processing
1046 concluded, but leaving the global pointer active for it.
1048 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1049 and to use the domains and local_parts ACL conditions.
1051 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1052 incorrectly not doubled on cutthrough transmission, hence seen as a
1053 body-termination at the receiving system - resulting in truncated mails.
1054 Commonly the sender saw a TCP-level error, and retransmitted the message
1055 via the normal store-and-forward channel. This could result in duplicates
1056 received - but deduplicating mailstores were liable to retain only the
1057 initial truncated version.
1059 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1061 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1063 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1064 we're in there, support oversigning also; bug 1309.
1066 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1068 HS/04 Add support for keep_environment and add_environment options.
1070 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1071 either intentional arithmetic overflow during PRNG, or testing config-
1074 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1075 delivery resulted in actual delivery. Cancel cutthrough before DATA
1078 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1079 rejects a recipient: pass the reject to the originator.
1081 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1082 Many were false-positives and ignorable, but it's worth fixing the
1085 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1086 for the new environment-manipulation done at startup. Move the routines
1087 from being local to tls.c to being global via the os.c file.
1089 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1090 an extract embedded as result-arg for a map, the first arg for extract
1091 is unavailable so we cannot tell if this is a numbered or keyed
1092 extraction. Accept either.
1098 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1101 JH/02 The smtp transport option "multi_domain" is now expanded.
1103 JH/03 The smtp transport now requests PRDR by default, if the server offers
1106 JH/04 Certificate name checking on server certificates, when exim is a client,
1107 is now done by default. The transport option tls_verify_cert_hostnames
1108 can be used to disable this per-host. The build option
1109 EXPERIMENTAL_CERTNAMES is withdrawn.
1111 JH/05 The value of the tls_verify_certificates smtp transport and main options
1112 default to the word "system" to access the system default CA bundle.
1113 For GnuTLS, only version 3.0.20 or later.
1115 JH/06 Verification of the server certificate for a TLS connection is now tried
1116 (but not required) by default. The verification status is now logged by
1117 default, for both outbound TLS and client-certificate supplying inbound
1120 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1123 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1124 Status Notification (bounce) messages are now MIME format per RFC 3464.
1125 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1126 under the control of the dsn_advertise_hosts option, and routers may
1127 have a dsn_lasthop option.
1129 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1130 default, modifiable by a malware= option. The list separator for
1131 the options can now be changed in the usual way. Bug 68.
1133 JH/10 The smtp_receive_timeout main option is now expanded before use.
1135 JH/11 The incoming_interface log option now also enables logging of the
1136 local interface on delivery outgoing connections.
1138 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1139 if the interface and destination host and port all match.
1141 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1144 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1145 Patch from Andrew Lewis.
1147 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1148 now supports optional time-restrictions, weighting, and priority
1149 modifiers per server. Patch originally by <rommer@active.by>.
1151 JH/16 The spamd_address main option now supports a mixed list of local
1152 and remote servers. Remote servers can be IPv6 addresses, and
1153 specify a port-range.
1155 JH/17 Bug 68: The spamd_address main option now supports an optional
1156 timeout value per server.
1158 JH/18 Bug 1581: Router and transport options headers_add/remove can
1159 now have the list separator specified.
1161 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1164 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1167 JH/21 Support for the A6 type of dns record is withdrawn.
1169 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1170 rather than the verbs used.
1172 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1173 from 255 to 1024 chars.
1175 JH/24 Verification callouts now attempt to use TLS by default.
1177 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1178 are generic router options now. The defaults didn't change.
1180 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1181 Original patch from Alexander Shikoff, worked over by JH.
1183 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1184 files if ZCAT_COMMAND is not executable.
1186 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1188 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1190 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1191 Normally benign, it bites when the pair was led to by a CNAME;
1192 modern usage is to not canonicalize the domain to a CNAME target
1193 (and we were inconsistent anyway for A-only vs AAAA+A).
1195 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1197 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1198 when evaluating $sender_host_dnssec.
1200 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1201 $sender_helo_dnssec variable.
1203 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1205 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1207 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1209 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1210 documented as working, but never had. Support all but $spam_report.
1212 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1213 added for tls authenticator.
1215 HS/03 Add perl_taintmode main config option
1221 TL/01 When running the test suite, the README says that variables such as
1222 no_msglog_check are global and can be placed anywhere in a specific
1223 test's script, however it was observed that placement needed to be near
1224 the beginning for it to behave that way. Changed the runtest perl
1225 script to read through the entire script once to detect and set these
1226 variables, reset to the beginning of the script, and then run through
1227 the script parsing/test process like normal.
1229 TL/02 The BSD's have an arc4random API. One of the functions to induce
1230 adding randomness was arc4random_stir(), but it has been removed in
1231 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1232 function when detected.
1234 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1235 cause callback expansion.
1237 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1238 syntax errors in an expansion can be treated as a string instead of
1239 logging or causing an error, due to the internal use of bool_lax
1240 instead of bool when processing it.
1242 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1243 server certificates when making smtp deliveries.
1245 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1247 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1249 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1251 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1252 Merged patch from Sebastian Wiedenroth.
1254 JH/05 Fix results-pipe from transport process. Several recipients, combined
1255 with certificate use, exposed issues where response data items split
1256 over buffer boundaries were not parsed properly. This eventually
1257 resulted in duplicates being sent. This issue only became common enough
1258 to notice due to the introduction of connection certificate information,
1259 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1261 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1262 size buffer was used, resulting in syntax errors when an expansion
1265 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1266 version 3.3.6 or later.
1268 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1269 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1270 both become "event_action", the variables become $event_name, $event_data
1271 and $event_defer_errno. There is a new variable $verify_mode, usable in
1272 routers, transports and related events. The tls:cert event is now also
1273 raised for inbound connections, if the main configuration event_action
1276 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1277 early OCSP support, but no stapling (appears to be less than 1.0.0).
1279 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1280 server certificate names available under the smtp transport option
1281 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1284 JH/10 Time-related extraction expansions from certificates now use the main
1285 option "timezone" setting for output formatting, and are consistent
1286 between OpenSSL and GnuTLS compilations. Bug 1541.
1288 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1289 encoded parameter in the incoming message. Bug 1558.
1291 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1292 include certificate info, eximon was claiming there were spoolfile
1295 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1297 JH/14 Log delivery-related information more consistently, using the sequence
1298 "H=<name> [<ip>]" wherever possible.
1300 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1301 are problematic for Debian distribution, omit them from the release
1304 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1306 JH/16 Fix string representation of time values on 64bit time_t architectures.
1309 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1310 output list separator was used.
1315 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1316 checkers that were complaining about end of non-void function with no
1319 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1320 This was a regression introduced in 4.83 by another bugfix.
1322 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1324 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1325 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1331 TF/01 Correctly close the server side of TLS when forking for delivery.
1333 When a message was received over SMTP with TLS, Exim failed to clear up
1334 the incoming connection properly after forking off the child process to
1335 deliver the message. In some situations the subsequent outgoing
1336 delivery connection happened to have the same fd number as the incoming
1337 connection previously had. Exim would try to use TLS and fail, logging
1338 a "Bad file descriptor" error.
1340 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1341 utilities have not been installed.
1343 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1344 temporary space as the ACL may create new global variables.
1346 TL/01 LDAP support uses per connection or global context settings, depending
1347 upon the detected version of the libraries at build time.
1349 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1350 to extract and use the src ip:port in logging and expansions as if it
1351 were a direct connection from the outside internet. PPv2 support was
1352 updated based on HAProxy spec change in May 2014.
1354 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1356 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1357 Properly escape header and check for NULL return.
1359 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1362 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1364 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1365 characters in header names, implemented as a verify condition.
1366 Contributed by Michael Fischer v. Mollard.
1368 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1369 results permerror and temperror. Previous values are deprecated but
1370 still accepted. In a future release, err_perm and err_temp will be
1371 completely removed, which will be a backward incompatibility if the
1372 ACL tests for either of these two old results. Patch contributed by
1373 user bes-internal on the mailing list.
1375 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1377 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1378 selectors, in both main and reject logs.
1380 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1383 JH/07 Add malware type "sock" for talking to simple daemon.
1385 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1387 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1388 routers/transports under cutthrough routing.
1390 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1391 numbers. Touch up "bool" conditional to keep the same definition.
1393 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1395 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1397 JH/12 Expand items in router/transport headers_add or headers_remove lists
1398 individually rather than the list as a whole. Bug 1452.
1400 Required for reasonable handling of multiple headers_ options when
1401 they may be empty; requires that headers_remove items with embedded
1402 colons must have them doubled (or the list-separator changed).
1404 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1405 view the policy declared in the DMARC record. Currently, $dmarc_status
1406 is a combined value of both the record presence and the result of the
1409 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1411 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1412 dnslookup router and the smtp transport (applying to the forward
1415 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1416 of ldap servers used for a specific lookup. Patch provided by Heiko
1419 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1420 New variable $lookup_dnssec_authenticated for observability.
1422 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1423 Patch submitted by Lars Timman.
1425 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1427 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1428 Requires trusted mode and valid format message id, aborts otherwise.
1429 Patch contributed by Heiko Schlichting.
1431 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1432 certextract with support for various fields. Bug 1358.
1434 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1435 is requested by default, modifiable by smtp transport option
1438 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1439 operate on certificate variables to give certificate fingerprints
1440 Also new ${sha256:cert_variable}.
1442 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1444 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1445 Christian Aistleitner.
1447 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1449 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1450 file. Patch from Wolfgang Breyha.
1452 JH/25 Expand the coverage of the delivery $host and $host_address to
1453 client authenticators run in verify callout. Bug 1476.
1455 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1456 align with daemon_smtp_ports. Bug 72.
1458 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1459 support and error reporting did not work properly.
1461 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1462 and is readable. Patch from Andrew Colin Kissa.
1464 TL/14 Enhance documentation of ${run expansion and how it parses the
1465 commandline after expansion, particularly in the case when an
1466 unquoted variable expansion results in an empty value.
1468 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1470 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1471 by renaming away from it. Addresses GH issue 15, reported by
1474 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1476 TL/15 SECURITY: prevent double expansion in math comparison functions
1477 (can expand unsanitized data). Not remotely exploitable.
1484 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1486 PP/02 Make -n do something, by making it not do something.
1487 When combined with -bP, the name of an option is not output.
1489 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1492 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1493 $sender_host_name and config options to manage this, and basic check
1496 PP/05 DSCP support for outbound connections and control modifier for inbound.
1498 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1499 (Only plugin which currently uses this is kerberos4, which nobody should
1500 be using, but we should make it available and other future plugins might
1501 conceivably use it, even though it would break NAT; stuff *should* be
1502 using channel bindings instead).
1504 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1505 name; added for Sendmail compatibility; requires admin caller.
1506 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1507 just ignore it); requires trusted caller.
1508 Also parse but ignore: -Ac -Am -X<logfile>
1511 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1513 TL/02 Add +smtp_confirmation as a default logging option.
1515 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1516 Patch by Magnus Holmgren from 2007-02-20.
1518 TL/04 Bugzilla 1281 - Spec typo.
1519 Bugzilla 1283 - Spec typo.
1520 Bugzilla 1290 - Spec grammar fixes.
1522 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1524 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1526 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1527 mailing list by by Dmitry Isaikin.
1529 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1531 JH/02 Support "G" suffix to numbers in ${if comparisons.
1533 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1535 NM/01 Bugzilla 1197 - Spec typo
1536 Bugzilla 1196 - Spec examples corrections
1538 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1540 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1541 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1544 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1545 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1547 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1548 "acl {{name}{arg}...}", and optional args on acl condition
1551 JH/05 Permit multiple router/transport headers_add/remove lines.
1553 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1555 JH/07 Avoid using a waiting database for a single-message-only transport.
1556 Performance patch from Paul Fisher. Bugzilla 1262.
1558 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1561 JH/09 Add $headers_added variable, with content from use of ACL modifier
1562 add_header (but not yet added to the message). Bugzilla 199.
1564 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1565 Pulled from Bugzilla 817 by Wolfgang Breyha.
1567 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1569 (nb: this is the same fix as in Exim 4.80.1)
1571 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1574 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1577 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1579 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1580 advertise SMTP AUTH mechanism to us, instead of a generic
1581 protocol violation error. Also, make Exim more robust to bad
1582 data from the Dovecot auth socket.
1584 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1586 When a queue runner is handling a message, Exim first routes the
1587 recipient addresses, during which it prunes them based on the retry
1588 hints database. After that it attempts to deliver the message to
1589 any remaining recipients. It then updates the hints database using
1592 So if a recipient address works intermittently, it can get repeatedly
1593 deferred at routing time. The retry hints record remains fresh so the
1594 address never reaches the final cutoff time.
1596 This is a fairly common occurrence when a user is bumping up against
1597 their storage quota. Exim had some logic in its local delivery code
1598 to deal with this. However it did not apply to per-recipient defers
1599 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1601 This change adds a proper retry rule check during routing so that the
1602 final cutoff time is checked against the message's age. We only do
1603 this check if there is an address retry record and there is not a
1604 domain retry record; this implies that previous attempts to handle
1605 the address had the retry_use_local_parts option turned on. We use
1606 this as an approximation for the destination being like a local
1607 delivery, as in LMTP.
1609 I suspect this new check makes the old local delivery cutoff check
1610 redundant, but I have not verified this so I left the code in place.
1612 TF/02 Correct gecos expansion when From: is a prefix of the username.
1614 Test 0254 submits a message to Exim with the header
1618 When I ran the test suite under the user fanf2, Exim expanded
1619 the header to contain my full name, whereas it should have added
1620 a Resent-Sender: header. It erroneously treats any prefix of the
1621 username as equal to the username.
1623 This change corrects that bug.
1625 GF/01 DCC debug and logging tidyup
1626 Error conditions log to paniclog rather than rejectlog.
1627 Debug lines prefixed by "DCC: " to remove any ambiguity.
1629 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1631 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1632 Bug spotted by Jeremy Harris; was flawed since initial commit.
1633 Would have resulted in OCSP responses post-SNI triggering an Exim
1634 NULL dereference and crash.
1636 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1638 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1639 Bug detection, analysis and fix by Samuel Thibault.
1640 Bugzilla 1331, Debian bug #698092.
1642 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1644 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1645 Server implementation by Todd Lyons, client by JH.
1646 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1647 config variable "prdr_enable" controls whether the server
1648 advertises the facility. If the client requests PRDR a new
1649 acl_data_smtp_prdr ACL is called once for each recipient, after
1650 the body content is received and before the acl_smtp_data ACL.
1651 The client is controlled by both of: a hosts_try_prdr option
1652 on the smtp transport, and the server advertisement.
1653 Default client logging of deliveries and rejections involving
1654 PRDR are flagged with the string "PRDR".
1656 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1657 fclose(). Diagnosis by Todd Lyons.
1659 PP/17 Update configure.default to handle IPv6 localhost better.
1660 Patch by Alain Williams (plus minor tweaks).
1663 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1664 This is now consistent with GnuTLS, and is now documented: the
1665 previous undocumented portable approach to treating the option as
1666 unset was to force an expansion failure. That still works, and
1667 an empty string is now equivalent.
1669 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1670 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1671 not performing validation itself.
1673 PP/20 Added force_command boolean option to pipe transport.
1674 Patch from Nick Koston, of cPanel Inc.
1676 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1679 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1681 PP/21 Fix eximon continuous updating with timestamped log-files.
1682 Broken in a format-string cleanup in 4.80, missed when I repaired the
1683 other false fix of the same issue.
1684 Report and fix from Heiko Schlichting.
1687 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1688 Report from Prashanth Katuri.
1690 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1691 It's SecureTransport, so affects any MacOS clients which use the
1692 system-integrated TLS libraries, including email clients.
1694 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1695 using a MIME ACL for non-SMTP local injection.
1696 Report and assistance in diagnosis by Warren Baker.
1698 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1700 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1702 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1703 last id that failed so it may be referenced in subsequent ACL's.
1705 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1708 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1709 ldap library initialization, allowing self-signed CA's to be
1710 used. Also properly sets require_cert option later in code by
1711 using NULL (global ldap config) instead of ldap handle (per
1712 session). Bug diagnosis and testing by alxgomz.
1714 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1715 the src/util/ subdirectory.
1717 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1718 renamed to Transport Post Delivery Action by Jeremy Harris, as
1721 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1722 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1723 redis_servers = needs to be configured which will be used by the redis
1724 lookup. Patch from Warren Baker, of The Packet Hub.
1726 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1728 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1729 hostname or reverse DNS when processing a host list. Used suggestions
1730 from multiple comments on this bug.
1732 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1734 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1735 Missed a few lines, added it to make the runtest require no keyboard
1738 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1739 contains upper case chars. Make router use caseful_local_part.
1741 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1742 support when GnuTLS has been built with p11-kit.
1748 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1750 This, or similar/improved, will also be change PP/11 of 4.82.
1756 PP/01 Handle short writes when writing local log-files.
1757 In practice, only affects FreeBSD (8 onwards).
1758 Bugzilla 1053, with thanks to Dmitry Isaikin.
1760 NM/01 Bugzilla 949 - Documentation tweak
1762 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1765 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1767 PP/02 Implemented gsasl authenticator.
1769 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1771 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1772 `pkg-config foo` for cflags/libs.
1774 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1775 with rest of GSASL and with heimdal_gssapi.
1777 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1778 `pkg-config foo` for cflags/libs for the TLS implementation.
1780 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1781 properties get this fed in as external SSF. A number of robustness
1782 and debugging improvements to the cyrus_sasl authenticator.
1784 PP/08 cyrus_sasl server now expands the server_realm option.
1786 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1787 Patch by Jeremy Harris.
1789 PP/10 Added dbmjz lookup type.
1791 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1793 PP/12 MAIL args handles TAB as well as SP, for better interop with
1794 non-compliant senders.
1795 Analysis and variant patch by Todd Lyons.
1797 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1798 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1799 Patch from Dirk Mueller <dmueller@suse.com>
1801 PP/13 tls_peerdn now print-escaped for spool files.
1802 Observed some $tls_peerdn in wild which contained \n, which resulted
1803 in spool file corruption.
1805 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1806 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1807 or write after TLS renegotiation, which otherwise led to messages
1810 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1811 as a tracking header (ie: a signed header comes before the signature).
1812 Patch from Wolfgang Breyha.
1814 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1815 comma-sep list; embedded commas doubled.
1817 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1819 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1821 Report and patch from Dmitry Banschikov.
1823 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1824 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1825 failures. We appear to now support TLS1.1+ with Exim.
1827 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1828 lets Exim select keys and certificates based upon TLS SNI from client.
1829 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1830 before an outbound SMTP session. New log_selector, +tls_sni.
1832 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1833 NULL dereference. Report and patch from Alun Jones.
1835 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1836 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1837 Not seeing resolver debug output on NetBSD, but suspect this is a
1838 resolver implementation change.
1840 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1841 Left warnings. Added "eximon gdb" invocation mode.
1843 PP/21 Defaulting "accept_8bitmime" to true, not false.
1845 PP/22 Added -bw for inetd wait mode support.
1847 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1848 locate the relevant includes and libraries. Made this the default.
1850 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1851 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1853 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1854 This may cause build issues on older platforms.
1856 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1857 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1858 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1859 Added SNI support via GnuTLS too.
1860 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1862 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1864 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1865 Applied second patch from Janne, implementing suggestion to default
1866 multiple-strings-in-record handling to match SPF spec.
1868 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1870 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1871 read-only, out of scope).
1872 Patch from Wolfgang Breyha, report from Stuart Northfield.
1874 PP/29 Fix three issues highlighted by clang analyser static analysis.
1875 Only crash-plausible issue would require the Cambridge-specific
1876 iplookup router and a misconfiguration.
1877 Report from Marcin Mirosław.
1879 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1881 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1882 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1883 As part of this, removing so much warning spew let me fix some minor
1884 real issues in debug logging.
1886 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1887 assignment on my part. Fixed.
1889 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1890 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1891 Janne Snabb (who went above and beyond: thank you).
1893 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1894 string otherwise requires a connection and a bunch more work and it's
1895 relatively easy to get wrong. Should also expose TLS library linkage
1898 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1899 64-bit ${eval} (JH/03).
1901 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1902 GNU libc to support some of the 64-bit stuff, should not lead to
1903 conflicts. Defined before os.h is pulled in, so if a given platform
1904 needs to override this, it can.
1906 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1907 protection layer was required, which is not implemented.
1908 Bugzilla 1254, patch from Wolfgang Breyha.
1910 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1911 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1912 tls_dhparam take prime identifiers. Also unbreak combination of
1913 OpenSSL+DH_params+TLSSNI.
1915 PP/39 Disable SSLv2 by default in OpenSSL support.
1921 PP/01 Solaris build fix for Oracle's LDAP libraries.
1922 Bugzilla 1109, patch from Stephen Usher.
1924 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1926 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1929 TF/02 Fix a couple more cases where we did not log the error message
1930 when unlink() failed. See also change 4.74-TF/03.
1932 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1933 lock up or crash if it happened to be inside a call to libc when it
1934 got a SIGUSR1 from exiwhat.
1936 The SIGUSR1 handler appends the current process status to the process
1937 log which is later printed by exiwhat. It used to use the general
1938 purpose logging code to do this, but several functions it calls are
1939 not safe for signals.
1941 The new output code in the SIGUSR1 handler is specific to the process
1942 log, and simple enough that it's easy to inspect for signal safety.
1943 Removing some special cases also simplifies the general logging code.
1944 Removing the spurious timestamps from the process log simplifies
1947 TF/04 Improved ratelimit ACL condition.
1949 The /noupdate option has been deprecated in favour of /readonly which
1950 has clearer semantics. The /leaky, /strict, and /readonly update modes
1951 are mutually exclusive. The update mode is no longer included in the
1952 database key; it just determines when the database is updated. (This
1953 means that when you upgrade Exim will forget old rate measurements.)
1955 Exim now checks that the per_* options are used with an update mode that
1956 makes sense for the current ACL. For example, when Exim is processing a
1957 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1958 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1959 must specify per_mail/readonly. If you omit the update mode it defaults to
1960 /leaky where that makes sense (as before) or /readonly where required.
1962 The /noupdate option is now undocumented but still supported for
1963 backwards compatibility. It is equivalent to /readonly except that in
1964 ACLs where /readonly is required you may specify /leaky/noupdate or
1965 /strict/noupdate which are treated the same as /readonly.
1967 A useful new feature is the /count= option. This is a generalization
1968 of the per_byte option, so that you can measure the throughput of other
1969 aggregate values. For example, the per_byte option is now equivalent
1970 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1972 The per_rcpt option has been generalized using the /count= mechanism
1973 (though it's more complicated than the per_byte equivalence). When it is
1974 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1975 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1976 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1977 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1978 Note that using per_rcpt with a non-readonly update mode in more than
1979 one ACL will cause the recipients to be double-counted. (The per_mail
1980 and per_byte options don't have this problem.)
1982 The handling of very low rates has changed slightly. If the computed rate
1983 is less than the event's count (usually one) then this event is the first
1984 after a long gap. In this case the rate is set to the same as this event's
1985 count, so that the first message of a spam run is counted properly.
1987 The major new feature is a mechanism for counting the rate of unique
1988 events. The new per_addr option counts the number of different
1989 recipients that someone has sent messages to in the last time period. It
1990 behaves like per_rcpt if all the recipient addresses are different, but
1991 duplicate recipient addresses do not increase the measured rate. Like
1992 the /count= option this is a general mechanism, so the per_addr option
1993 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1994 example, measure the rate that a client uses different sender addresses
1995 with the options per_mail/unique=$sender_address. There are further
1996 details in the main documentation.
1998 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2000 TF/06 Removed a few PCRE remnants.
2002 TF/07 Automatically extract Exim's version number from tags in the git
2003 repository when doing development or release builds.
2005 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2006 Bugzilla 879. Patch from Paul Fisher.
2008 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2009 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2012 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2014 PP/05 Variable $av_failed, true if the AV scanner deferred.
2015 Bugzilla 1078. Patch from John Horne.
2017 PP/06 Stop make process more reliably on build failure.
2018 Bugzilla 1087. Patch from Heiko Schlittermann.
2020 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2021 Bugzilla 1089. Patch from Heiko Schlittermann.
2023 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2024 Bugzilla 1131. Patch from Holger Weiß.
2026 PP/09 Handle IPv6 addresses with SPF.
2027 Bugzilla 860. Patch from Wolfgang Breyha.
2029 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2031 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2034 PP/11 match_* no longer expand right-hand-side by default.
2035 New compile-time build option, EXPAND_LISTMATCH_RHS.
2036 New expansion conditions, "inlist", "inlisti".
2038 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2040 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2042 PP/14 fix log_write() format string regression from TF/03.
2043 Bugzilla 1152. Patch from Dmitry Isaikin.
2049 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2051 PP/02 Harmonised TLS library version reporting; only show if debugging.
2052 Layout now matches that introduced for other libraries in 4.74 PP/03.
2054 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2056 PP/04 New "dns_use_edns0" global option.
2058 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2061 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2062 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2064 TK/01 Updated PolarSSL code to 0.14.2.
2065 Bugzilla 1097. Patch from Andreas Metzler.
2067 PP/07 Catch divide-by-zero in ${eval:...}.
2068 Fixes bugzilla 1102.
2070 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2073 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2074 format-string attack -- SECURITY: remote arbitrary code execution.
2076 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2077 time unintentionally subject to list matching rules, letting the header
2078 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2079 arbitrary string expansion). This allowed for information disclosure.
2081 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2082 INT_MIN/-1 -- value coerced to INT_MAX.
2088 NM/01 Workaround for PCRE version dependency in version reporting
2091 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2092 This fixes portability to compilers other than gcc, notably
2093 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2095 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2096 makefiles for portability to HP-UX and POSIX correctness.
2098 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2099 Also via indented variable definition in the Makefile.
2100 (Debugging by Oliver Heesakkers).
2102 PP/02 Restore caching of spamd results with expanded spamd_address.
2103 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2105 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2106 Improves build reliability. Fix from: Frank Elsner
2108 NM/02 Fix wide character breakage in the rfc2047 coding
2109 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2111 NM/03 Allow underscore in dnslist lookups
2112 Fixes bug 1026. Patch from Graeme Fowler
2114 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2115 Code patches from Adam Ciarcinski of NetBSD.
2117 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2120 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2121 is logged, to avoid truncation. Patch from John Horne.
2123 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2124 Patch from Jakob Hirsch.
2126 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2127 SQL string expansion failure details.
2128 Patch from Andrey Oktyabrski.
2130 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2131 Patch from Simon Arlott.
2133 PP/09 New lookups functionality failed to compile on old gcc which rejects
2134 extern declarations in function scope.
2135 Patch from Oliver Fleischmann
2137 PP/10 Use sig_atomic_t for flags set from signal handlers.
2138 Check getgroups() return and improve debugging.
2139 Fixed developed for diagnosis in bug 927 (which turned out to be
2142 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2143 Patch from Mark Zealey.
2145 PP/12 Bugzilla 1056: Improved spamd server selection.
2146 Patch from Mark Zealey.
2148 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2149 Based on patch from Heiko Schlittermann.
2151 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2152 Patch from Uwe Doering, sign-off by Michael Haardt.
2154 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2155 variable declaration deep within a block. Bug and patch from
2158 PP/15 lookups-Makefile IRIX compatibility coercion.
2160 PP/16 Make DISABLE_DKIM build knob functional.
2162 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2163 Patch by Simon Arlott
2165 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2166 variable argument macros. Our copy now differs from upstream.
2172 TF/01 Failure to get a lock on a hints database can have serious
2173 consequences so log it to the panic log.
2175 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2176 controlled using the smtp_confirmation log selector.
2178 TF/03 Include the error message when we fail to unlink a spool file.
2180 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2181 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2182 for maintaining out-of-tree patches for some time.
2184 PP/01 Bugzilla 139: Documentation and portability issues.
2185 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2186 Handle per-OS dynamic-module compilation flags.
2188 PP/02 Let /dev/null have normal permissions.
2189 The 4.73 fixes were a little too stringent and complained about the
2190 permissions on /dev/null. Exempt it from some checks.
2191 Reported by Andreas M. Kirchwitz.
2193 PP/03 Report version information for many libraries, including
2194 Exim version information for dynamically loaded libraries. Created
2195 version.h, now support a version extension string for distributors
2196 who patch heavily. Dynamic module ABI change.
2198 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2199 privilege escalation vulnerability whereby the Exim run-time user
2200 can cause root to append content of the attacker's choosing to
2203 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2206 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2207 If dropping privileges for untrusted macros, we disabled normal logging
2208 on the basis that it would fail; for the Exim run-time user, this is not
2209 the case, and it resulted in successful deliveries going unlogged.
2210 Fixed. Reported by Andreas Metzler.
2216 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2217 only prepend for the Resent-* case. Fixes regression introduced in
2218 Exim 4.70 by NM/22 for Bugzilla 607.
2220 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2221 increasing numbers of administrators be bitten by this.
2223 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2225 PP/03 Bugzilla 994: added openssl_options main configuration option.
2227 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2229 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2231 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2233 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2234 without a peer certificate, leading to a segfault because of an
2235 assumption that peers always have certificates. Be a little more
2236 paranoid. Problem reported by Martin Tscholak.
2238 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2239 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2240 NB: ClamAV planning to remove STREAM in "middle of 2010".
2241 CL also introduces -bmalware, various -d+acl logging additions and
2242 more caution in buffer sizes.
2244 PP/09 Implemented reverse_ip expansion operator.
2246 PP/10 Bugzilla 937: provide a "debug" ACL control.
2248 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2250 PP/12 Bugzilla 973: Implement --version.
2252 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2254 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2256 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2258 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2259 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2260 ignore trailing whitespace.
2262 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2264 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2267 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2268 Notification from Dr Andrew Aitchison.
2270 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2271 ExtendedDetectionInfo response format.
2272 Notification from John Horne.
2274 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2277 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2278 XSL and documented dependency on system catalogs, with examples of how
2281 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2284 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2285 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2286 configuration file which is writeable by the Exim user or group.
2288 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2289 of configuration files to cover files specified with the -C option if
2290 they are going to be used with root privileges, not just the default
2293 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2294 option (effectively making it always true).
2296 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2297 files to be used while preserving root privileges.
2299 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2300 that rogue child processes cannot use them.
2302 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2303 run-time user, instead of root.
2305 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2306 Exim run-time user without dropping privileges.
2308 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2309 result string, instead of calling string_vformat() twice with the same
2312 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2313 for other users. Others should always drop root privileges if they use
2314 -C on the command line, even for a whitelisted configure file.
2316 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2318 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2324 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2325 $data_path, and $header_path variables; fixed documentation bugs and
2328 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2329 exipick to access non-standard spools, including the "frozen" queue
2332 NM/01 Bugzilla 965: Support mysql stored procedures.
2333 Patch from Alain Williams
2335 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2337 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2338 Patch from Andreas Metzler
2340 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2341 Patch from Kirill Miazine
2343 NM/05 Bugzilla 671: Added umask to procmail example.
2345 JJ/03 installed exipick 20100323.0, fixing doc bug
2347 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2348 directory. Notification and patch from Dan Rosenberg.
2350 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2352 TK/02 Improve log output when DKIM signing operation fails.
2354 MH/01 Treat the transport option dkim_domain as a colon separated
2355 list, not as a single string, and sign the message with each element,
2356 omitting multiple occurences of the same signer.
2358 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2359 Bugzilla 985, 986. Patch by Simon Arlott
2361 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2362 Patch by Simon Arlott
2364 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2365 MBX locking. Notification from Dan Rosenberg.
2371 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2373 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2375 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2377 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2379 NM/04 Bugzilla 915: Flag broken perl installation during build.
2385 TK/01 Added patch by Johannes Berg that expands the main option
2386 "spamd_address" if it starts with a dollar sign.
2388 TK/02 Write list of recipients to X-Envelope-Sender header when building
2389 the mbox-format spool file for content scanning (suggested by Jakob
2392 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2393 (http://www.dcc-servers.net/) support via dccifd. Activated by
2394 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2396 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2397 by Mark Daniel Reidel <mr@df.eu>.
2399 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2400 When building exim an external PCRE library is now needed -
2401 PCRE is a system library on the majority of modern systems.
2402 See entry on PCRE_LIBS in EDITME file.
2404 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2405 conversation. Added nologin parameter to request.
2406 Patch contributed by Kirill Miazine.
2408 TF/01 Do not log submission mode rewrites if they do not change the address.
2410 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2412 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2413 log files in place. Contributed by Roberto Lima.
2415 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2417 TF/03 Bugzilla 615: When checking the local_parts router precondition
2418 after a local_part_suffix or local_part_prefix option, Exim now
2419 does not use the address's named list lookup cache, since this
2420 contains cached lookups for the whole local part.
2422 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2423 Robert Millan. Documentation is in experimental-spec.txt.
2425 TF/04 Bugzilla 668: Fix parallel build (make -j).
2427 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2429 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2430 Patch provided by Jan Srzednicki.
2432 TF/05 Leading white space used to be stripped from $spam_report which
2433 wrecked the formatting. Now it is preserved.
2435 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2436 that they are available at delivery time.
2438 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2440 TF/08 TLS error reporting now respects the incoming_interface and
2441 incoming_port log selectors.
2443 TF/09 Produce a more useful error message if an SMTP transport's hosts
2444 setting expands to an empty string.
2446 NM/06 Bugzilla 744: EXPN did not work under TLS.
2447 Patch provided by Phil Pennock.
2449 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2450 Patch provided by Richard Godbee.
2452 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2453 acl_smtp_notquit, added index entry.
2455 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2456 Patch provided by Eugene Bujak.
2458 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2459 accept(). Patch provided by Maxim Dounin.
2461 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2462 Patch provided by Phil Pennock.
2464 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2466 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2467 Patch provided by Brad "anomie" Jorsch.
2469 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2470 Patch provided by Dean Brooks.
2472 TK/05 Add native DKIM support (does not depend on external libraries).
2474 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2475 Patch provided by Graeme Fowler.
2477 NM/16 Bugzilla 851: Documentation example syntax fix.
2479 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2481 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2484 NM/19 Bugzilla 745: TLS version reporting.
2485 Patch provided by Phil Pennock.
2487 NM/20 Bugzilla 167: bool: condition support.
2488 Patch provided by Phil Pennock.
2490 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2491 clients. Patch provided by Phil Pennock.
2493 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2494 Patch provided by Brad "anomie" Jorsch.
2496 NM/23 Bugzilla 687: Fix misparses in eximstats.
2497 Patch provided by Heiko Schlittermann.
2499 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2500 Patch provided by Heiko Schlittermann.
2502 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2503 plus update to original patch.
2505 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2507 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2508 Patch provided by David Brownlee.
2510 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2512 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2514 NM/30 Bugzilla 888: TLS documentation bugfixes.
2516 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2518 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2519 Unlike the original bugzilla I have changed all shell scripts in src tree.
2521 NM/33 Bugzilla 898: Transport filter timeout fix.
2522 Patch by Todd Rinaldo.
2524 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2525 Patch by Serge Demonchaux.
2527 NM/35 Bugzilla 39: Base64 decode bug fixes.
2528 Patch by Jakob Hirsch.
2530 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2532 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2534 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2536 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2542 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2543 ALT-N's libdkim that I have put here:
2544 http://duncanthrax.net/exim-experimental/
2546 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2547 were called 'true' and it seems that C99 defines that as a reserved
2548 keyword to be used with 'bool' variable types. That means you could
2549 not include C99-style headers which use bools without triggering
2550 build errors in sieve.c.
2552 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2553 as mailq or other aliases. Changed the --help handling significantly
2554 to do whats expected. exim_usage() emits usage/help information.
2556 SC/01 Added the -bylocaldomain option to eximstats.
2558 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2560 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2562 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2568 PH/01 Another patch from the Sieve maintainer.
2570 PH/02 When an IPv6 address is converted to a string for single-key lookup
2571 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2572 dots are used instead of colons so that keys in lsearch files need not
2573 contain colons. This was done some time before quoting was made available
2574 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2575 (notated using the quote facility) so as to distinguish them from IPv4
2576 keys. This meant that lookups for IP addresses in host lists did not work
2577 for iplsearch lookups.
2579 This has been fixed by arranging for IPv6 addresses to be expressed with
2580 colons if the lookup type is iplsearch. This is not incompatible, because
2581 previously such lookups could never work.
2583 The situation is now rather anomalous, since one *can* have colons in
2584 ordinary lsearch keys. However, making the change in all cases is
2585 incompatible and would probably break a number of configurations.
2587 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2590 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2591 conversion specification without a maximum field width, thereby enabling
2592 a rogue spamd server to cause a buffer overflow. While nobody in their
2593 right mind would setup Exim to query an untrusted spamd server, an
2594 attacker that gains access to a server running spamd could potentially
2595 exploit this vulnerability to run arbitrary code as the Exim user.
2597 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2598 $primary_hostname instead of what libspf2 thinks the hosts name is.
2600 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2601 a directory entry by the name of the lookup key. Previously, if a
2602 symlink pointed to a non-existing file or a file in a directory that
2603 Exim lacked permissions to read, a lookup for a key matching that
2604 symlink would fail. Now it is enough that a matching directory entry
2605 exists, symlink or not. (Bugzilla 503.)
2607 PH/03 The body_linecount and body_zerocount variables are now exported in the
2610 PH/04 Added the $dnslist_matched variable.
2612 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2613 This means they are set thereafter only if the connection becomes
2616 PH/06 Added the client_condition to authenticators so that some can be skipped
2617 by clients under certain conditions.
2619 PH/07 The error message for a badly-placed control=no_multiline_responses left
2620 "_responses" off the end of the name.
2622 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2624 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2625 (without spaces) instead of just copying the configuration text.
2627 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2629 PH/11 Added $max_received_linelength.
2631 PH/12 Added +ignore_defer and +include_defer to host lists.
2633 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2634 way in which PCRE > 7.0 is built.
2636 PH/14 Implemented queue_only_load_latch.
2638 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2639 MAIL command. The effect was to mangle the value on 64-bit systems.
2641 PH/16 Another patch from the Sieve maintainer.
2643 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2645 PH/18 If a system quota error occurred while trying to create the file for
2646 a maildir delivery, the message "Mailbox is full" was not appended to the
2647 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2648 only to a quota excession during the actual writing of the file.
2650 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2651 characters?) which causes problems in log lines. The DN values are now
2652 passed through string_printing() before being added to log lines.
2654 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2655 and InterBase are left for another time.)
2657 PH/21 Added message_body_newlines option.
2659 PH/22 Guard against possible overflow in moan_check_errorcopy().
2661 PH/23 POSIX allows open() to be a macro; guard against that.
2663 PH/24 If the recipient of an error message contained an @ in the local part
2664 (suitably quoted, of course), incorrect values were put in $domain and
2665 $local_part during the evaluation of errors_copy.
2671 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2672 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2675 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2676 issue a MAIL command.
2678 PH/02 In an ACL statement such as
2680 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2682 if a client was not listed at all, or was listed with a value other than
2683 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2684 the condition was not true (as it should be), so access was not denied.
2685 The bug was that the ! inversion was incorrectly passed on to the second
2686 item. This has been fixed.
2688 PH/03 Added additional dnslists conditions == and =& which are different from
2689 = and & when the dns lookup returns more than one IP address.
2691 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2692 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2694 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2695 FSYNC, which compiles an option called disable_fsync that allows for
2696 bypassing fsync(). The documentation is heavily laced with warnings.
2698 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2700 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2701 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2702 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2703 including adding "make clean"; (3) Added -fPIC when compiling the test
2704 dynamically loaded module, to get rid of a warning.
2706 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2707 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2708 = 0s. The bug is otherwise harmless.
2710 PH/07 There was a bug in the dovecot authenticator such that the value of
2711 $auth1 could be overwritten, and so not correctly preserved, after a
2712 successful authentication. This usually meant that the value preserved by
2713 the server_setid option was incorrect.
2715 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2717 PH/09 Installed PCRE release 7.0.
2719 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2720 run for batched SMTP input. It is now run at the start of every message
2721 in the batch. While fixing this I discovered that the process information
2722 (output by running exiwhat) was not always getting set for -bs and -bS
2723 input. This is fixed, and it now also says "batched" for BSMTP.
2725 PH/11 Added control=no_pipelining.
2727 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2728 patch, slightly modified), and move the expansion of helo_data till after
2729 the connection is made in the smtp transport (so it can use these
2732 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2734 PH/14 Added log_selector = +pid.
2736 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2738 PH/16 Add ${if forany and ${if forall.
2740 PH/17 Added dsn_from option to vary the From: line in DSNs.
2742 PH/18 Flush SMTP output before performing a callout, unless control =
2743 no_callout_flush is set.
2745 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2746 was true (the default) a successful delivery failed to delete the retry
2747 item, thus causing premature timeout of the address. The bug is now
2750 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2752 PH/21 Long custom messages for fakedefer and fakereject are now split up
2753 into multiline responses in the same way that messages for "deny" and
2754 other ACL rejections are.
2756 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2757 with slight modification.
2759 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2760 draft, changing the syntax and factoring some duplicate code".
2762 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2763 for deliveries of the second and subsequent messages over the same SMTP
2766 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2767 ${reduce, with only minor "tidies".
2769 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2771 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2772 expansion side effects.
2774 PH/27 When a message times out after an over-quota error from an Exim-imposed
2775 quota, the bounce message says "mailbox is full". This message was not
2776 being given when it was a system quota that was exceeded. It now should
2779 MH/03 Made $recipients available in local_scan(). local_scan() already has
2780 better access to the recipient list through recipients_list[], but
2781 $recipients can be useful in postmaster-provided expansion strings.
2783 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2784 in the case of a MAIL command with additional options following the
2785 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2786 were accidentally chopped off.
2788 PH/29 SMTP synchronization checks are implemented when a command is read -
2789 there is a check that no more input is waiting when there shouldn't be
2790 any. However, for some commands, a delay in an ACL can mean that it is
2791 some time before the response is written. In this time, more input might
2792 arrive, invalidly. So now there are extra checks after an ACL has run for
2793 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2794 pipelining has not been advertised.
2796 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2798 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2799 returned in the SMTP response when smtp_return_error_details was false.
2800 This has been fixed.
2802 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2803 instead of the C I/O that was originally supplied, because problems were
2804 reported on Solaris.
2806 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2807 Exim which did not show up earlier: it was assuming that a call to
2808 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2809 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2810 was a macro that became an assignment, so it seemed to work. This has
2811 changed to a proper function call with a void return, hence the compile
2812 error. Exim's code has been fixed.
2814 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2817 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2819 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2821 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2822 because it turns out to be too big or there is a timeout) there is no
2823 "Completed" line in the log. When some messages of this type were
2824 selected by exigrep, they were listed as "not completed". Others were
2825 picked up by some special patterns. I have improved the selection
2826 criteria to be more general.
2828 PH/38 The host_find_failed option in the manualroute router can now be set
2829 to "ignore", to completely ignore a host whose IP address cannot be
2830 found. If all hosts are ignored, the behaviour is controlled by the new
2831 host_all_ignored option.
2833 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2834 homing or because of multiple MX records with /mx) generated more than
2835 one IP address, and the following item turned out to be the local host,
2836 all the secondary addresses of the first item were incorrectly removed
2837 from the list, along with the local host and any following hosts (which
2838 is what is supposed to happen).
2840 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2841 whoever called Exim into the -H file. In the case of the daemon it was
2842 behaving confusingly. When first started, it used values for whoever
2843 started the daemon, but after a SIGHUP it used the Exim user (because it
2844 calls itself on a restart). I have changed the code so that it now always
2847 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2848 message are rejected with the same error (e.g. no authentication or bad
2849 sender address), and a DATA command is nevertheless sent (as can happen
2850 with PIPELINING or a stupid MUA), the error message that was given to the
2851 RCPT commands is included in the rejection of the DATA command. This is
2852 intended to be helpful for MUAs that show only the final error to their
2855 PH/42 Another patch from the Sieve maintainer.
2857 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2858 Eximstats - Fixed some broken HTML links and added missing column headers
2860 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2861 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2863 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2865 PH/43 Yet another patch from the Sieve maintainer.
2867 PH/44 I found a way to check for a TCP/IP connection going away before sending
2868 the response to the final '.' that terminates a message, but only in the
2869 case where the client has not sent further data following the '.'
2870 (unfortunately, this is allowed). However, in many cases there won't be
2871 any further data because there won't be any more messages to send. A call
2872 to select() can be used: if it shows that the input is "ready", there is
2873 either input waiting, or the socket has been closed. An attempt to read
2874 the next input character can distinguish the two cases. Previously, Exim
2875 would have sent an OK response which the client would never have see.
2876 This could lead to message repetition. This fix should cure that, at
2877 least in a lot of common cases.
2879 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2880 advertised in response to EHLO.
2886 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2887 fixed by 4.65/MH/01 (is this a record?) are fixed:
2889 (i) An empty string was always treated as zero by the numeric comparison
2890 operators. This behaviour has been restored.
2892 (ii) It is documented that the numeric comparison operators always treat
2893 their arguments as decimal numbers. This was broken in that numbers
2894 starting with 0 were being interpreted as octal.
2896 While fixing these problems I realized that there was another issue that
2897 hadn't been noticed. Values of message_size_limit (both the global option
2898 and the transport option) were treated as octal if they started with 0.
2899 The documentation was vague. These values are now always treated as
2900 decimal, and I will make that clear in the documentation.
2906 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2907 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2910 MH/01 Don't check that the operands of numeric comparison operators are
2911 integers when their expansion is in "skipping" mode (fixes bug
2912 introduced by 4.64-PH/07).
2914 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2915 child addresses, Exim now panics and dies. Previously, because the count
2916 is held in a short int, deliveries were likely to be lost. As such a
2917 large number of recipients for a single message is ridiculous
2918 (performance will be very, very poor), I have chosen to impose a limit
2919 rather than extend the field.
2925 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2926 leftover -K file (the existence of which was triggered by #402).
2927 While we were at it, introduced process PID as part of the -K
2928 filename. This should rule out race conditions when creating
2931 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2932 processing considerably. Previous code took too long for large mails,
2933 triggering a timeout which in turn triggers #401.
2935 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2936 in the DK code in transports.c. sendfile() is not really portable,
2937 hence the _LINUX specificness.
2939 TF/01 In the add_headers option to the mail command in an Exim filter,
2940 there was a bug that Exim would claim a syntax error in any
2941 header after the first one which had an odd number of characters
2944 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2945 callout verification, Exim cached a "reject" for the entire domain. This
2946 is correct for most verifications, but it is not correct for a recipient
2947 verification with use_sender or use_postmaster set, because in that case
2948 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2949 case of MAIL FROM:<> rejection from other early rejections (e.g.
2950 rejection of HELO). When verifying a recipient using a non-null MAIL
2951 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2952 Whatever the result of the callout, the value of the domain cache is
2953 left unchanged (for any other kind of callout, getting as far as trying
2954 RCPT means that the domain itself is ok).
2956 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2959 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2960 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2961 session, the daemon ignores ECONNECT errors and logs others; it now
2962 ignores EPIPE as well.
2964 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2965 (quoted-printable decoding).
2967 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2968 later the small subsequent patch to fix an introduced bug.
2970 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2972 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2974 PH/08 An error is now given if message_size_limit is specified negative.
2976 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2977 to be given (somewhat) arbitrary names.
2979 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2982 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2983 miscellaneous code fixes
2985 PH/10 Added the log_reject_target ACL modifier to specify where to log
2988 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2989 hostname. This is wrong, because it relates to the incoming message (and
2990 probably the interface on which it is arriving) and not to the outgoing
2991 callout (which could be using a different interface). This has been
2992 changed to use the value of the helo_data option from the smtp transport
2993 instead - this is what is used when a message is actually being sent. If
2994 there is no remote transport (possible with a router that sets up host
2995 addresses), $smtp_active_hostname is used.
2997 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2998 tweaks were necessary in order to get it to work (see also 21 below):
2999 (a) The code assumed that strncpy() returns a negative number on buffer
3000 overflow, which isn't the case. Replaced with Exim's string_format()
3002 (b) There were several signed/unsigned issues. I just did the minimum
3003 hacking in of casts. There is scope for a larger refactoring.
3004 (c) The code used strcasecmp() which is not a standard C function.
3005 Replaced with Exim's strcmpic() function.
3006 (d) The code set only $1; it now sets $auth1 as well.
3007 (e) A simple test gave the error "authentication client didn't specify
3008 service in request". It would seem that Dovecot has changed its
3009 interface. Fortunately there's a specification; I followed it and
3010 changed what the client sends and it appears to be working now.
3012 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3015 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3016 address A is aliased to B and C, where B exists and C does not. Without
3017 -v the output is "A verified" because verification stops after a
3018 successful redirection if more than one address is generated. However,
3019 with -v the child addresses are also verified. Exim was outputting "A
3020 failed to verify" and then showing the successful verification for C,
3021 with its parentage. It now outputs "B failed to verify", showing B's
3022 parentage before showing the successful verification of C.
3024 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3025 look up a TXT record in a specific list after matching in a combined
3028 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3029 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3030 they consult the DNS. I had assumed they would set it the way they
3031 wanted; and indeed my experiments on Linux seem to show that in some
3032 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3033 To be on the safe side, however, I have now made the interface to
3034 host_find_byname() similar to host_find_bydns(), with an argument
3035 containing the DNS resolver options. The host_find_byname() function now
3036 sets these options at its start, just as host_find_bydns() does. The smtp
3037 transport options dns_qualify_single and dns_search_parents are passed to
3038 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3039 of host_find_byname() use the default settings of RES_DEFNAMES
3040 (qualify_single) but not RES_DNSRCH (search_parents).
3042 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3043 spool_read_header() do less string testing, by means of a preliminary
3044 switch on the second character of optional "-foo" lines. (This is
3045 overdue, caused by the large number of possibilities that now exist.
3046 Originally there were few.) While I was there, I also converted the
3047 str(n)cmp tests so they don't re-test the leading "-" and the first
3048 character, in the hope this might squeeze out yet more improvement.
3050 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3051 flag allowing group syntax was set by the header_syntax check but not
3052 turned off, possible causing trouble later; (2) The flag was not being
3053 set at all for the header_verify test, causing "group"-style headers to
3054 be rejected. I have now set it in this case, and also caused header_
3055 verify to ignore an empty address taken from a group. While doing this, I
3056 came across some other cases where the code for allowing group syntax
3057 while scanning a header line wasn't quite right (mostly, not resetting
3058 the flag correctly in the right place). These bugs could have caused
3059 trouble for malformed header lines. I hope it is now all correct.
3061 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3062 with the "reply" argument non-NULL. The code, however (which originally
3063 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3064 but it didn't always do it. This confused somebody who was copying the
3065 code for some other use. I have removed all the tests.
3067 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3068 feature that was used to support insecure browsers during the U.S. crypto
3069 embargo. It requires special client support, and Exim is probably the
3070 only MTA that supported it -- and would never use it because real RSA is
3071 always available. This code has been removed, because it had the bad
3072 effect of slowing Exim down by computing (never used) parameters for the
3073 RSA_EXPORT functionality.
3075 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3076 authenticator to fail if there's a tab character in the incoming data
3077 (there should never be unless someone is messing about, as it's supposed
3078 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3079 if the connection is using TLS or if the remote IP is the same as the
3080 local IP, and the "valid-client-cert option" if a client certificate has
3083 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3084 authenticators. This can be used for authorization after authentication
3085 succeeds. (In the case of plaintext, it servers for both authentication
3088 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3089 if any retry times were supplied.
3091 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3092 connection, where there is no client IP address to check. In this
3093 situation, the verify now always succeeds.
3095 PH/25 Applied John Jetmore's -Mset patch.
3097 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3099 PH/27 In a string expansion for a processed (not raw) header when multiple
3100 headers of the same name were present, leading whitespace was being
3101 removed from all of them, but trailing whitespace was being removed only
3102 from the last one. Now trailing whitespace is removed from each header
3103 before concatenation. Completely empty headers in a concatenation (as
3104 before) are ignored.
3106 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3107 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3109 PH/29 [Removed. This was a change that I later backed out, and forgot to
3110 correct the ChangeLog entry (that I had efficiently created) before
3111 committing the later change.]
3113 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3114 address errors (4xx response to RCPT) over the same connection as other
3115 messages routed to the same hosts. Such deliveries are always "forced",
3116 so retry times are not inspected. This resulted in far too many retries
3117 for the affected addresses. The effect occurred only when there were more
3118 hosts than the hosts_max_try setting in the smtp transport when it had
3119 the 4xx errors. Those hosts that it had tried were not added to the list
3120 of hosts for which the message was waiting, so if all were tried, there
3121 was no problem. Two fixes have been applied:
3123 (i) If there are any address or message errors in an SMTP delivery, none
3124 of the hosts (tried or untried) are now added to the list of hosts
3125 for which the message is waiting, so the message should not be a
3126 candidate for sending over the same connection that was used for a
3127 successful delivery of some other message. This seems entirely
3128 reasonable: after all the message is NOT "waiting for some host".
3129 This is so "obvious" that I'm not sure why it wasn't done
3130 previously. Hope I haven't missed anything, but it can't do any
3131 harm, as the worst effect is to miss an optimization.
3133 (ii) If, despite (i), such a delivery is accidentally attempted, the
3134 routing retry time is respected, so at least it doesn't keep
3135 hammering the server.
3137 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3138 in ${readsocket because some servers need this prod.
3140 PH/32 Added some extra debug output when updating a wait-xxx database.
3142 PH/33 The hint "could be header name not terminated by colon", which has been
3143 given for certain expansion errors for a long time, was not being given
3144 for the ${if def:h_colon_omitted{... case.
3146 PH/34 The spec says: "With one important exception, whenever a domain list is
3147 being scanned, $domain contains the subject domain." There was at least
3148 one case where this was not true.
3150 PH/35 The error "getsockname() failed: connection reset by peer" was being
3151 written to the panic log as well as the main log, but it isn't really
3152 panic-worthy as it just means the connection died rather early on. I have
3153 removed the panic log writing for the ECONNRESET error when getsockname()
3156 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3157 runs only) independently of the message's sender address. This meant
3158 that, if the 4xx error was in fact related to the sender, a different
3159 message to the same recipient with a different sender could confuse
3160 things. In particular, this can happen when sending to a greylisting
3161 server, but other circumstances could also provoke similar problems.
3162 I have changed the default so that the retry time for these errors is now
3163 based a combination of the sender and recipient addresses. This change
3164 can be overridden by setting address_retry_include_sender=false in the
3167 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3168 remote server are returned as part of bounce messages. This was not
3169 happening for LMTP over a pipe (the lmtp transport), but now it is the
3170 same for both kinds of LMTP.
3172 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3173 in header lines that were in fact CNAMEs. This is no longer the case.
3175 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3176 and queue runs started by the daemon processed all messages. This has
3177 been fixed so that -R and -S can now usefully be given with -q<time>.
3179 PH/40 Import PCRE release 6.7 (fixes some bugs).
3181 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3183 PH/42 Give an error if -q is specified more than once.
3185 PH/43 Renamed the variables $interface_address and $interface_port as
3186 $received_ip_address and $received_port, to make it clear that these
3187 values apply to message reception, and not to the outgoing interface when
3188 a message is delivered. (The old names remain recognized, of course.)
3190 PH/44 There was no timeout on the connect() call when using a Unix domain
3191 socket in the ${readsocket expansion. There now is.
3193 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3194 be meaningful with "accept".
3196 SC/01 Eximstats V1.43
3197 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3199 SC/02 Eximstats V1.44
3200 Use a glob alias rather than an array ref in the generated
3201 parser. This improves both readability and performance.
3203 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3204 Collect SpamAssassin and rejection statistics.
3205 Don't display local sender or destination tables unless
3206 there is data to show.
3207 Added average volumes into the top table text output.
3209 SC/04 Eximstats V1.46
3210 Collect data on the number of addresses (recipients)
3211 as well as the number of messages.
3213 SC/05 Eximstats V1.47
3214 Added 'Message too big' to the list of mail rejection
3215 reasons (thanks to Marco Gaiarin).
3217 SC/06 Eximstats V1.48
3218 Mainlog lines which have GMT offsets and are too short to
3219 have a flag are now skipped.
3221 SC/07 Eximstats V1.49 (Alain Williams)
3222 Added the -emptyok flag.
3224 SC/08 Eximstats V1.50
3225 Fixes for obtaining the IP address from reject messages.
3227 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3228 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3229 whitespace changes from 4.64-PH/27
3231 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3234 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3235 are found, allow negative numbers in numeric criteria)
3237 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3239 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3240 to match changes made in 4.64-PH/43
3242 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3244 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3245 "domain" is actually an IP address, and force a failure. This locks out
3246 those revolvers/nameservers that support "A-for-A" lookups, in
3247 contravention of the specifications.
3249 PH/48 When a host name was looked up from an IP address, and the subsequent
3250 forward lookup of the name timed out, the host name was left in
3251 $sender_host_name, contrary to the specification.
3253 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3254 restricted to single-key lookups, Exim was not diagnosing an error if
3255 * or *@ was used with a query-style lookup.
3257 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3259 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3260 long ago, but noone interested enough thought of it. Let's just say that
3261 the "1.1" means that there are some new functions that weren't there at
3262 some point in the past.
3264 PH/51 Error processing for expansion failure of helo_data from an smtp
3265 transport during callout processing was broken.
3267 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3268 tested/used via the -bh/-bhc/-bs options.
3270 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3271 bug, fixed in subsequent PCRE releases).
3273 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3274 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3276 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3282 SC/01 Use a glob alias rather than an array ref in eximstats generated
3283 parser. This improves both readability and performance.
3285 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3286 Don't display local sender or destination tables in eximstats unless
3287 there is data to show.
3288 Added average volumes into the eximstats top table text output.
3290 SC/03 Collect data on the number of addresses (recipients) as well
3291 as the number of messages in eximstats.
3293 TF/01 Correct an error in the documentation for the redirect router. Exim
3294 does (usually) call initgroups() when daemonizing.
3296 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3297 with consistent privilege compared to when running as a daemon.
3299 TF/03 Note in the spec that $authenticated_id is not set for local
3300 submissions from trusted users.
3302 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3303 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3305 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3306 by adding some example configuration directives to the default
3307 configuration file. A little bit of work is required to uncomment the
3308 directives and define how usernames and passwords are checked, but
3309 there is now a framework to start from.
3311 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3312 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3313 without this. I don't know how relevant this is to other LDAP libraries.
3315 PH/02 Add the verb name to the "unknown ACL verb" error.
3317 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3319 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3321 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3322 directory not expanded when it should be if an expanded home directory
3323 was set for the address (which is overridden by the transport).
3325 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3328 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3329 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3330 because it is too late at that time, and has no effect.
3332 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3333 security issue with \' (bugzilla #107). I could not use the
3334 PQescapeStringConn() function, because it needs a PGconn value as one of
3337 PH/08 When testing addresses using -bt, indicate those final addresses that
3338 are duplicates that would not cause an additional delivery. At least one
3339 person was confused, thinking that -bt output corresponded to deliveries.
3340 (Suppressing duplicates isn't a good idea as you lose the information
3341 about possibly different redirections that led to the duplicates.)
3343 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3344 systems where poll() doesn't work, in particular OS X.
3346 PH/10 Added more information to debugging output for retry time not reached.
3348 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3349 operations in malware.c.
3351 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3354 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3355 syslog_duplication set false, log lines that would normally be written
3356 both the the main log and to the reject log were not written to syslog at
3359 PH/14 In the default configuration, change the use of "message" in ACL warn
3360 statements to "add_header".
3362 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3363 not followed by a command (e.g. "seen endif").
3365 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3366 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3369 PH/17 Added extra conditions to the default value of delay_warning_condition
3373 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3374 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3375 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3378 The Auto-Submitted: and various List- headers are standardised, whereas I
3379 don't think Precedence: ever was.
3381 PH/18 Refactored debugging code in route_finduser() to show more information,
3382 in particular, the error code if getpwnam() issues one.
3384 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3385 This is apparently needed in addition to the PH/07 change above to avoid
3386 any possible encoding problems.
3388 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3389 but not after initializing Perl.
3391 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3392 output them only if debugging. By default they are written stderr,
3393 apparently, which is not desirable.
3395 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3398 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3401 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3403 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3404 authenticated or an ident call has been made. Suppress the default
3405 values for $authenticated_id and $authenticated_sender (but permit -oMai
3406 and -oMas) when testing with -bh.
3408 PH/24 Re-jigged the order of the tests in the default configuration so that the
3409 tests for valid domains and recipients precede the DNS black list and CSA
3410 tests, on the grounds that those ones are more expensive.
3412 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3413 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3414 This bug exists in every version of Exim that I still have, right back to
3417 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3418 However, an attempt to turn on case-sensitivity in a regex key by
3419 including (?-i) didn't work because the subject string was already
3420 lowercased, and the effects were non-intuitive. It turns out that a
3421 one-line patch can be used to allow (?-i) to work as expected.
3427 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3428 other effects) broke the use of negated acl sub-conditions.
3430 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3433 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3434 "Deny" causes Exim to reject the incoming connection with a 554 error.
3435 Unfortunately, if there is a major crisis, such as a disk failure,
3436 tcp-wrappers gives "deny", whereas what one would like would be some
3437 kind of temporary error. A kludge has been added to help with this.
3438 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3439 554 error is used if errno is still zero or contains ENOENT (which occurs
3440 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3443 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3445 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3446 errors. Otherwise a message that provokes a temporary error (when other
3447 messages do not) can cause a whole host to time out.
3449 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3450 addresses were routed directly to files or pipes from a redirect router.
3451 File deliveries just didn't batch; pipe deliveries might have suffered
3454 PH/06 A failure to get a lock for a hints database would erroneously always say
3455 "Failed to get write lock", even when it was really a read lock.
3457 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3458 of 0600. This has been changed to use the value of the lockfile_mode
3459 option (which defaults to 0600).
3461 PH/08 Applied small patch from the Sieve maintainer.
3463 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3464 folder from quota calculations, a direct delivery into this folder messed
3465 up the contents of the maildirsize file. This was because the regex was
3466 used only to exclude .Trash (or whatever) when the size of the mailbox
3467 was calculated. There was no check that a delivery was happening into an
3468 excluded directory. This bug has been fixed by ignoring all quota
3469 processing for deliveries into excluded directories.
3471 PH/10 Added the maildirfolder_create_regex option to appendfile.
3477 PH/01 The code for finding all the local interface addresses on a FreeBSD
3478 system running IPv6 was broken. This may well have applied to all BSD
3479 systems, as well as to others that have similar system calls. The broken
3480 code found IPv4 interfaces correctly, but gave incorrect values for the
3481 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3482 that it would not match correctly against @[] and not recognize the IPv6
3485 PH/02 The ipliteral router was not recognizing addresses of the form user@
3486 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3488 PH/03 Added disable_ipv6.
3490 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3491 decoded form, because it is most often used to construct To: headers
3492 lines in autoreplies, and the decoded form may well be syntactically
3493 invalid. However, $reply_address has leading white space removed, and all
3494 newlines turned into spaces so that the autoreply transport does not
3497 PH/05 If group was specified without a user on a router, and no group or user
3498 was specified on a transport, the group from the router was ignored.
3500 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3501 for visible compile-time settings that can be used to change these
3502 numbers, for those that want even more. Backwards compatibility with old
3503 spool files has been maintained. However, going back to a previous Exim
3504 release will lost any variables that are in spool files.
3506 PH/07 Two small changes when running in the test harness: increase delay when
3507 passing a TCP/IP connection to a new process, in case the original
3508 process has to generate a bounce, and remove special handling of
3509 127.0.0.2 (sic), which is no longer necessary.
3511 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3512 be the same on different OS.
3514 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3517 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3518 whether --show-vars was specified or not
3520 JJ/02 exipick: Added support for new ACL variable spool format introduced
3523 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3524 syntactically invalid From: or Reply-to: line, and a filter used this to
3525 generate an autoreply, and therefore failed to obtain an address for the
3526 autoreply, Exim could try to deliver to a non-existent relative file
3527 name, causing unrelated and misleading errors. What now happens is that
3528 it logs this as a hard delivery error, but does not attempt to create a
3531 PH/11 The exinext utility has a -C option for testing purposes, but although
3532 the given file was scanned by exinext itself; it wasn't being passed on
3533 when Exim was called.
3535 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3536 an end-of-file indication when reading a command response.
3538 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3539 compiled. In many other places in Exim, IPv6 addresses are always
3540 recognized, so I have changed this. It also means that IPv4 domain
3541 literals of the form [IPV4:n.n.n.n] are now always recognized.
3543 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3544 used if the router is not running as root, for example, when verifying at
3545 ACL time, or when using -bh. The debugging output from this situation was
3546 non-existent - all you got was a failure to exec. I have made two
3549 (a) Failures to set uid/gid, the current directory, or a process leader
3550 in a subprocess such as that created by queryprogram now generate
3551 suitable debugging output when -d is set.
3553 (b) The queryprogram router detects when it is not running as root,
3554 outputs suitable debugging information if -d is set, and then runs
3555 the subprocess without attempting to change uid/gid.
3557 PH/15 Minor change to Makefile for building test_host (undocumented testing
3560 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3561 additional section of a DNS packet that returns MX or SRV records.
3562 Instead, it always explicitly searches for A/AAAA records. This avoids
3563 major problems that occur when a DNS server includes only records of one
3564 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3565 fixed another bug: if SRV records were looked up and the corresponding
3566 address records were *not* found in the additional section, the port
3567 values from the SRV records were lost.
3569 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3570 using the correct key (the original address) when searching the retry
3571 rules in order to find which one to use for generating the retry hint.
3573 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3574 adding the default one. Similarly, if it contains a Reply-To: header, the
3575 errors_reply_to option, if set, is not used.
3577 PH/19 When calculating a retry time, Exim used to measure the "time since
3578 failure" by looking at the "first failed" field in the retry record. Now
3579 it does not use this if it is later than than the arrival time of the
3580 message. Instead it uses the arrival time. This makes for better
3581 behaviour in cases where some deliveries succeed, thus re-setting the
3582 "first failed" field. An example is a quota failure for a huge message
3583 when small messages continue to be delivered. Without this change, the
3584 "time since failure" will always be short, possible causing more frequent
3585 delivery attempts for the huge message than are intended.
3586 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3588 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3589 $1, $2, $3) because the numerical variables can be reset during some
3590 expansion items (e.g. "match"), thereby losing the authentication data.
3592 PH/21 Make -bV show the size of off_t variables so that the test suite can
3593 decide whether to run tests for quotas > 2G.
3595 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3596 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3597 filecount value is greater than 2G or if a quota value is greater than 2G
3598 on a system where the size of off_t is not greater than 4, a panic error
3601 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3602 never match. The debug and -bh output now contains an explicit error
3603 message indicating a malformed IPv4 address or mask.
3605 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3606 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3607 PH/23 above applies.
3609 PH/25 Do not write to syslog when running in the test harness. The only
3610 occasion when this arises is a failure to open the main or panic logs
3611 (for which there is an explicit test).
3613 PH/26 Added the /no_tell option to "control=freeze".
3615 PH/27 If a host name lookup failed very early in a connection, for example, if
3616 the IP address matched host_lookup and the reverse lookup yielded a name
3617 that did not have a forward lookup, an error message of the form "no IP
3618 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3619 could be logged. Now it outputs the IP address instead of "NULL".
3621 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3622 allows the sender and the authenticated sender to be set when
3623 submitting a message from within Exim. Since child_open_exim() is
3624 documented for local_scan(), the new function should be too.
3626 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3627 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3628 results in an empty string is now treated as unset.
3630 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3632 PH/31 Added sender_verify_fail logging option.
3634 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3635 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3636 tidied the source and removed it altogether.
3638 PH/33 When a queue run was abandoned because the load average was too high, a
3639 log line was always written; now it is written only if the queue_run log
3640 selector is set. In addition, the log line for abandonment now contains
3641 information about the queue run such as the pid. This is always present
3642 in "start" and "stop" lines but was omitted from the "abandon" line.
3644 PH/34 Omit spaces between a header name and the colon in the error message that
3645 is given when verify = headers_syntax fails (if there are lots of them,
3646 the message gets confusing).
3648 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3649 names, as there are now some PTR records that contain slashes. This check
3650 is only to protect against broken name servers that fall over on strange
3651 characters, so the fact that it applies to all lookups doesn't matter.
3653 PH/36 Now that the new test suite is complete, we can remove some of the
3654 special code in Exim that was needed for the old test suite. For example,
3655 sorting DNS records because real resolvers return them in an arbitrary
3656 order. The new test suite's fake resolver always returns records in the
3659 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3660 bounces) except when queue_only is set, to avoid logging races between
3661 the different processes.
3663 PH/38 Panic-die if .include specifies a non-absolute path.
3665 PH/39 A tweak to the "H" retry rule from its user.
3667 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3668 a label. They prevented compilation on older perls.
3670 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3671 a warning to be raised on newish perls.
3673 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3674 on queue. Changes to match documented behaviour of showing count of
3675 messages matching specified criteria.
3677 PH/40 Changed the default ident timeout from 30s to 5s.
3679 PH/41 Added support for the use of login_cap features, on those BSD systems
3680 that have them, for controlling the resources used by pipe deliveries.
3682 PH/42 The content-scanning code uses fopen() to create files in which to put
3683 message data. Previously it was not paying any attention to the mode of
3684 the files. Exim runs with umask(0) because the rest of the code creates
3685 files with open(), and sets the required mode explicitly. Thus, these
3686 files were ending up world-writeable. This was not a big issue, because,
3687 being within the spool directory, they were not world-accessible. I have
3688 created a function called modefopen, which takes an additional mode
3689 argument. It sets umask(777), creates the file, chmods it to the required
3690 mode, then resets the umask. All the relevant calls to fopen() in the
3691 content scanning code have been changed to use this function.
3693 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3694 to 24 hours. This avoids potential overflow problems when processing G
3695 and H retry rules. I suspect nobody ever tinkers with this value.
3697 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3699 PH/45 When the plaintext authenticator is running as a client, the server's
3700 challenges are checked to ensure they are valid base64 strings. By
3701 default, the authentication attempt is cancelled if an invalid string is
3702 received. Setting client_ignore_invalid_base64 true ignores these errors.
3703 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3704 they are received. Thus, the responses can be made to depend on the
3705 challenges. If an invalid string is ignored, an empty string is placed in
3708 PH/46 Messages that are created by the autoreply transport now contains a
3709 References: header, in accordance with RFCs 2822 and 3834.
3711 PH/47 Added authenticated_sender_force to the smtp transport.
3713 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3715 PH/49 Installed latest patch from the Sieve maintainer.
3717 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3718 was also set, the appendfile transport was unnecessarily scanning a
3719 directory of message files (e.g. for maildir delivery) to find the count
3720 of files (along with the size), even though it did not need this
3721 information. It now does the scan only if it needs to find either the
3722 size of the count of files.
3724 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3726 PH/52 Two bugs concerned with error handling when the smtp transport is
3729 (i) Exim was not creating retry information for temporary errors given
3730 for individual recipients after the DATA command when the smtp transport
3731 was used in LMTP mode. This meant that they could be retried too
3732 frequently, and not timed out correctly.
3734 (ii) Exim was setting the flag that allows error details to be returned
3735 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3736 recipients that were returned after the DATA command.
3738 PH/53 This is related to PH/52, but is more general: for any failing address,
3739 when detailed error information was permitted to be returned to the
3740 sender, but the error was temporary, then after the final timeout, only
3741 "retry timeout exceeded" was returned. Now it returns the full error as
3742 well as "retry timeout exceeded".
3744 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3745 do this, and (what is worse) MTAs that accept it.
3747 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3748 will now be deprecated.
3750 PH/56 New os.c-cygwin from the Cygwin maintainer.
3752 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3753 formats (previously only available in exim formats via -bpr, -bpru,
3754 and -bpra. Now also available in native and exiqgrep formats)
3756 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3757 with very large, slow to parse queues
3759 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3761 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3763 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3764 responses to authentication challenges, though it was showing the
3765 challenges; (ii) I've removed the CR characters from the debug output for
3768 PH/58 Allow for the insertion of a newline as well as a space when a string
3769 is turned into more than one encoded-word during RFC 2047 encoding. The
3770 Sieve code now uses this.
3772 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3773 data_4xx, lost_connection, tls_required.
3775 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3776 message was being sent as an SMTP response.
3778 PH/61 Add -l and -k options to exicyclog.
3780 PH/62 When verifying, if an address was redirected to one new address, so that
3781 verification continued, and the new address failed or deferred after
3782 having set something in $address_data, the value of $address_data was not
3783 passed back to the ACL. This was different to the case when no
3784 redirection occurred. The value is now passed back in both cases.
3786 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3787 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3788 use login_cap.h, so on its own it isn't the distinguishing feature. The
3789 new name refers directly to the setclassresources() function.
3791 PH/65 Added configuration files for NetBSD3.
3793 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3795 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3796 is preferred over IPv4.
3798 PH/68 The bounce_return_message and bounce_return_body options were not being
3799 honoured for bounces generated during the reception of non-SMTP messages.
3800 In particular, this applied to messages rejected by the ACL. This bug has
3801 been fixed. However, if bounce_return_message is true and bounce_return_
3802 body is false, the headers that are returned for a non-SMTP message
3803 include only those that have been read before the error was detected.
3804 (In the case of an ACL rejection, they have all been read.)
3806 PH/69 The HTML version of the specification is now built in a directory called
3807 spec_html instead of spec.html, because the latter looks like a path with
3808 a MIME-type, and this confuses some software.
3810 PH/70 Catch two compiler warnings in sieve.c.
3812 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3813 function verify_get_ident() calls ip_connect() to connect a socket, but
3814 if the "connect()" function timed out, ip_connect() used to close the
3815 socket. However, verify_get_ident() also closes the socket later, and in
3816 between Exim writes to the log, which may get opened at this point. When
3817 the socket was closed in ip_connect(), the log could get the same file
3818 descriptor number as the socket. This naturally causes chaos. The fix is
3819 not to close the socket in ip_connect(); the socket should be closed by
3820 the function that creates it. There was only one place in the code where
3821 this was missing, in the iplookup router, which I don't think anybody now
3822 uses, but I've fixed it anyway.
3824 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3825 well as to direct DNS lookups. Otherwise the handling of names in host
3826 lists is inconsistent and therefore confusing.
3832 PH/01 Two changes to the default runtime configuration:
3834 (1) Move the checks for relay_from_hosts and authenticated clients from
3835 after to before the (commented out) DNS black list checks.
3837 (2) Add control=submission to the relay_from_hosts and authenticated
3838 clients checks, on the grounds that messages accepted by these
3839 statements are most likely to be submissions.
3841 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3843 (1) Generate an error if the third argument for the ${prvs expansion is
3846 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3849 (3) Reset the variables that are obtained from the first argument of
3850 ${prvscheck and used in the second argument before leaving the code,
3851 because their memory is reclaimed, so using them afterwards may do
3854 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3855 one (it's much easier than Tom thought :-).
3857 (5) Because of (4), we can now allow for the use of $prvscheck_result
3858 inside the third argument.
3860 PH/03 For some reason, the default setting of PATH when running a command from
3861 a pipe transport was just "/usr/bin". I have changed it to
3864 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3865 anything to be listed in the output from -bV.
3867 PH/05 When a filter generated an autoreply, the entire To: header line was
3868 quoted in the delivery log line, like this:
3870 => >A.N.Other <ano@some.domain> <original@ddress> ...
3872 This has been changed so that it extracts the operative address. There
3873 may be more than one such address. If so, they are comma-separated, like
3876 => >ano@some.domain,ona@other.domain <original@ddress> ...
3878 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3879 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3880 not being looked up in the rDNS to get a host name, Exim was showing the
3881 IP address twice in Received: lines, even though the IP addresses were
3882 identical. For example:
3884 Received: from [1.2.3.4] (helo=[1.2.3.4])
3886 However, if the real host name was known, it was omitting the HELO data
3887 if it matched the actual IP address. This has been tidied up so that it
3888 doesn't show the same IP address twice.
3890 PH/07 When both +timestamp and +memory debugging was on, the value given by
3891 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3892 called by the debug printing, thereby overwriting the timestamp buffer.
3893 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3895 PH/08 When the original message was included in an autoreply transport, it
3896 always said "this is a copy of the message, including all the headers",
3897 even if body_only or headers_only was set. It now gives an appropriate
3900 PH/09 Applied a patch from the Sieve maintainer which:
3902 o fixes some comments
3903 o adds the (disabled) notify extension core
3904 o adds some debug output for the result of if/elsif tests
3905 o points to the current vacation draft in the documentation
3906 and documents the missing references header update
3910 o fixes a bug in processing the envelope test (when testing
3911 multiple envelope elements, the last element determined the
3914 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3915 Electronic Mail") by including:
3917 Auto-submitted: auto-generated
3919 in the messages that it generates (bounce messages and others, such as
3920 warnings). In the case of bounce messages for non-SMTP messages, there was
3921 also a typo: it was using "Auto_submitted" (underscore instead of
3922 hyphen). Since every message generated by Exim is necessarily in response
3923 to another message, thes have all been changed to:
3925 Auto-Submitted: auto-replied
3927 in accordance with these statements in the RFC:
3929 The auto-replied keyword:
3931 - SHOULD be used on messages sent in direct response to another
3932 message by an automatic process,
3934 - MUST NOT be used on manually-generated messages,
3936 - MAY be used on Delivery Status Notifications (DSNs) and Message
3937 Disposition Notifications (MDNs),
3939 - MUST NOT be used on messages generated by automatic or periodic
3940 processes, except for messages which are automatic responses to
3943 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3944 to the default Received: header definition.
3946 PH/12 Added log selector acl_warn_skipped (default on).
3948 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3949 variables because (a) they are in the wrong storage pool and (b) even if
3950 they were copied, it wouldn't work properly because of the caching.
3952 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3953 checking when decoding. Apparently there are clients that generate
3954 overlong encoded strings. Why am I not surprised?
3956 PH/15 If the first argument of "${if match_address" was not empty, but did not
3957 contain an "@" character, Exim crashed. Now it writes a panic log message
3958 and treats the condition as false.
3960 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3962 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3963 extension "envelope-auth". The code is finished and in agreement with
3964 other implementations, but there is no documentation so far and in fact,
3965 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3966 not changing the active code.
3968 Print executed "if" and "elsif" statements when debugging is used. This
3969 helps a great deal to understand what a filter does.
3971 Document more things not specified clearly in RFC3028. I had all this
3972 sorted out, when out of a sudden new issues came to my mind. Oops."
3974 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3977 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3978 canonical form (as documented). However, after a host name lookup from
3979 the IP address, check_host() was doing a simple string comparison with
3980 addresses acquired from the DNS when checking that the found name did
3981 have the original IP as one of its addresses. Since any found IPv6
3982 addresses are likely to be in abbreviated form, the comparison could
3983 fail. Luckily, there already exists a function for doing the comparison
3984 by converting both addresses to binary, so now that is used instead of
3985 the text comparison.
3987 PH/20 There was another similar case to PH/19, when a complete host name was
3988 given in a host list; looking up its IP address could give an abbreviated
3989 form, whereas the current host's name might or might not be abbreviated.
3990 The same fix has been applied.
3996 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3997 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4000 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4001 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4003 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4005 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4006 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4007 Also, for "Auto-Submitted", treat anything other than "no" as
4008 non-personal, in accordance with RFC 3834. (Previously it treated
4009 anything starting "auto-" as non-personal.)
4011 TF/01 The control=submission/name=... option had a problem with syntax
4012 errors if the name included a slash character. The /name= option
4013 now slurps the rest of the string, so it can include any characters
4014 but it must come last in the list of options (after /sender_retain
4017 PH/05 Some modifications to the interface to the fake nameserver for the new
4025 TK/01 Added the "success_on_redirect" address verification option. See
4026 NewStuff for rationale and an example.
4028 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4030 PH/02 Patch to exigrep to allow it to work on syslog lines.
4032 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4033 fread() to skip over the body file's header line, because in Cygwin the
4034 header line is locked and is inaccessible.
4036 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4037 co-exist for some time) to make it clear that it is the Exim ID that is
4038 referenced, not the Message-ID: header line.
4040 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4041 string_format() function, because snprintf() does not exist on all
4044 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4045 ${stat: expansion item.
4047 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4048 protocol synchronization error", to keep the pedants happy.
4050 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4051 well as for IRIX systems, when gcc is being used. See the host.c source
4054 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4056 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4059 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4060 transport and to the smtp transport in LMTP mode.
4062 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4064 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4065 run a filter in a subprocess. This could lead to confusion in subsequent
4066 lookups in the parent process. There should also be a search_tidyup() at
4067 the end of the subprocess.
4069 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4070 only if the host matched helo_try_verify_hosts, which caused the
4071 verification to occur when the EHLO/HELO command was issued. The ACL just
4072 tested the remembered result. Now, if a previous verification attempt has
4073 not happened, "verify = helo" does it there and then.
4075 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4077 TK/03 Fix log output including CR from clamd.
4079 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4080 exist provoked a memory error which could cause a segfault.
4082 PH/15 Installed PCRE 6.2
4084 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4086 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4087 of the problem. Specifically, suggested +O2 rather than +O1 for the
4090 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4092 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4093 record, the port was not correctly logged when the outgoing_port log
4094 selector was set (it logged the transort's default port).
4096 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4097 fallback_hosts, and "hosts" in the smtp transport.
4099 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4100 host errors such as "Connection refused".
4102 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4103 authentication with radiusclient 0.4.9:
4105 - Error returned from rc_read_config was caught wrongly
4106 - Username/password not passed on to radius server due to wrong length.
4108 The presumption is that some radiusclient API changes for 4.51/PH/17
4109 were not taken care of correctly. The code is still untested by me (my
4110 Linux distribution still has 0.3.2 of radiusclient), but it was
4111 contributed by a Radius user.
4113 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4114 expanding the "port" option of the smtp transport.
4116 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4117 while reading a MIME header. Thanks to Tom Hughes for a patch.
4119 PH/24 Include config.h inside local_scan.h so that configuration settings are
4122 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4123 that in an ACL for RCPT (for example), you can examine exactly what was
4126 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4127 commands, but it was not correctly comparing the address with the actual
4128 client host address. Thus, it would show the EHLO address in Received:
4129 header lines when this was not necessary.
4131 PH/27 Added the % operator to ${eval:}.
4133 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4134 it should be ignoring failures (because with -C, for example, it has lost
4135 privilege). It wasn't ignoring creation failures other than "already
4138 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4141 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4142 because an input line was too long, either on its own, or by virtue of
4143 too many continuations, the temporary file was not being removed, and the
4144 return code was incorrect.
4146 PH/31 Missing "BOOL" in function definition in filtertest.c.
4148 PH/32 Applied Sieve patches from the maintainer.
4150 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4152 PH/33 Added "verify = not_blind".
4154 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4155 Local/Makefile (with some defaults set). These are used in built scripts
4156 such as exicyclog, but they have never been used in the exim_install
4157 script (though there are many overriding facilities there). I have
4158 arranged that the exim_install script now takes note of these two
4161 PH/35 Installed configuration files for Dragonfly.
4163 PH/36 When a locally submitted message by a trusted user did not contain a
4164 From: header, and the sender address was obtained from -f or from an SMTP
4165 MAIL command, and the trusted user did not use -F to supply a sender
4166 name, $originator_name was incorrectly used when constructing a From:
4167 header. Furthermore, $originator_name was used for submission mode
4168 messages from external hosts without From: headers in a similar way,
4169 which is clearly wrong.
4171 PH/37 Added control=suppress_local_fixups.
4173 PH/38 When log_selector = +received_sender was set, and the addition of the
4174 sender made the log line's construction buffer exactly full, or one byte
4175 less than full, an overflow happened when the terminating "\n" was
4178 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4179 when the result of a list match is failure because a DNS lookup failed.
4181 PH/40 RM_COMMAND is now used in the building process.
4183 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4184 the "build-* directories that it finds.
4186 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4187 address in a domain literal was a prefix of an interface address.
4189 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4190 when verifying a sender address, unless rewrite_headers is false.
4192 PH/44 Wrote a long comment about why errors_to addresses are verified as
4193 recipients, not senders.
4195 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4196 the ratelimit ACL was added.
4198 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4200 PH/46 Added extra information about PostgreSQL errors to the error string.
4202 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4203 avoiding the need to install special zones in a real server. This is
4204 backwards compatible; if it can't find the fake resolver, it drops back.
4205 Thus, both old and new test suites can be run.
4207 TF/02 Added util/ratelimit.pl
4209 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4210 clock is set back in time.
4212 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4213 Candler <B.Candler@pobox.com>.
4215 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4216 OK for addresses that are the result of redirections.
4218 PH/48 A number of further additions for the benefit of the new test suite,
4219 including a fake gethostbyname() that interfaces to the fake DNS resolver
4222 TF/06 The fix for widen_domains has also been applied to qualify_single and
4223 search_parents which are the other dnslookup options that can cause
4226 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4229 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4231 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4232 service" if it encountered an MX record with an empty target hostname.
4233 The message is now "an MX or SRV record indicated no SMTP service".
4235 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4236 if the DNS of the sending site is misconfigured. This is quite a
4237 common situation. This change restores the behaviour of treating a
4238 helo verification defer as a failure.
4240 PH/51 If self=fail was set on a router, the bounce message did not include the
4241 actual error message.
4247 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4249 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4250 command itself ended in error, the underlying message about the transport
4251 filter timeout was being overwritten with the pipe command error. Now the
4252 underlying error message should be appended to the second error message.
4254 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4256 PH/02 Reduce the amount of output that "make" produces by default. Full output
4257 can still be requested.
4259 PH/03 The warning log line about a condition test deferring for a "warn" verb
4260 was being output only once per connection, rather than after each
4261 occurrence (because it was using the same function as for successful
4262 "warn" verbs). This seems wrong, so I have changed it.
4264 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4265 it should not have, which might have caused a crash in the right
4266 circumstances, but probably never did.
4268 PH/04 Installed a modified version of Tony Finch's patch to make submission
4269 mode fix the return path as well as the Sender: header line, and to
4270 add a /name= option so that you can make the user's friendly name appear
4273 TF/03 Added the control = fakedefer ACL modifier.
4275 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4276 Mark Lowes for thorough testing.
4278 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4280 TK/03 Merged latest SRS patch from Miles Wilton.
4282 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4283 with the definition in sysexits.h (which is #included earlier).
4284 Fortunately, Exim does not actually use EX_OK. The code used to try to
4285 preserve the sysexits.h value, by assuming that macro definitions were
4286 scanned for macro replacements. I have been disabused of this notion,
4287 so now the code just undefines EX_OK before #including unistd.h.
4289 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4290 in the smtp transport. When a block could not be written in a single
4291 write() function, the timeout was being re-applied to each part-write.
4292 This seems wrong - if the receiver was accepting one byte at a time it
4293 would take for ever. The timeout is now adjusted when this happens. It
4294 doesn't have to be particularly precise.
4296 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4297 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4299 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4300 without a domain if the check to <postmaster@domain> fails.
4302 SC/01 Eximstats: added -xls and the ability to specify output files
4303 (patch written by Frank Heydlauf).
4305 SC/02 Eximstats: use FileHandles for outputting results.
4307 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4309 SC/04 Eximstats: fixed display of large numbers with -nvr option
4311 SC/05 Eximstats: fixed merging of reports with empty tables.
4313 SC/06 Eximstats: added the -include_original_destination flag
4315 SC/07 Eximstats: removed tabs and trailing whitespace.
4317 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4319 TK/06 MBOX spool code: Add real "From " MBOX separator line
4320 so the .eml file is really in mbox format (even though
4321 most programs do not really care). Patch from Alex Miller.
4323 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4324 The latter is generated from $received_to and is only set if the
4325 message has one envelope recipient. SA can use these headers,
4326 obviously out-of-the-box. Patch from Alex Miller.
4328 PH/08 The ${def test on a variable was returning false if the variable's
4329 value was "0", contrary to what the specification has always said!
4330 The result should be true unless the variable is empty.
4332 PH/09 The syntax error of a character other than { following "${if
4333 def:variable_name" (after optional whitespace) was not being diagnosed.
4334 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4335 accidental colon was present, for example, could give incorrect results.
4337 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4338 result is used (not including appendfile, where other changes are about
4341 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4342 This involved changing a lot of size variables from int to off_t. It
4343 should work with maildirs and everything.
4345 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4346 spamd dying while we are connected to it.
4348 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4351 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4352 function for BDB 4.3.
4354 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4356 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4357 the sources for PCRE have been re-arranged and more files are now
4360 PH/15 The code I had for printing potentially long long variables in PH/11
4361 above was not the best (it lost precision). The length of off_t variables
4362 is now inspected at build time, and an appropriate printing format (%ld
4363 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4364 to be "long long int" or "long int". This is needed for the internal
4365 formatting function string_vformat().
4367 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4368 the configuration file to be ":syslog", then the script "guesses" where
4369 the logs files are, rather than using the compiled in default. In our
4370 case the guess is not the same as the compiled default, so the script
4371 suddenly stopped working when I started to use syslog. The patch checks
4372 to see if log_file_path is "". If so, it attempts to read it from exim
4373 with no configuration file to get the compiled in version, before it
4374 falls back to the previous guessing code."
4376 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4377 implementing BATV in an Exim configuration. See NewStuff for the gory
4380 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4381 Makefile that are specific to HP-UX.
4383 PH/18 If the "use_postmaster" option was set for a recipient callout together
4384 with the "random" option, the postmaster address was used as the MAIL
4385 FROM address for the random test, but not for the subsequent recipient
4386 test. It is now used for both.
4388 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4389 patch removes a few documentation additions to RFC 3028, because the
4390 latest draft now contains them. It adds the new en;ascii-case comparator
4391 and a new error check for 8bit text in MIME parts. Comparator and
4392 require names are now matched exactly. I enabled the subaddress
4393 extension, but it is not well tested yet (read: it works for me)."
4395 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4396 rework some of the code of TK/09 above to avoid the hardwired use of
4397 "%lld" and "long long". Replaced the call to snprintf() with a call to
4400 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4401 records point to non-existent hosts", "retry timeout exceeded", and
4402 "retry time not reached for any host after a long failure period".
4404 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4405 experimental DomainKeys support:
4407 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4408 (2) On an error such as an illegally used "control", the wrong name for
4409 the control was given.
4411 These problems did NOT occur unless DomainKeys support was compiled.
4413 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4415 PH/24 Added ${if match_ip condition.
4417 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4418 databases so that it will be absolutely obvious if a crash occurs in the
4419 DB library. This is a regular occurrence (often caused by mis-matched
4422 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4423 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4424 picked up on a user's system that detects such things. There doesn't seem
4425 to be a gcc warning option for this - only an attribute that has to be
4426 put on the function's prototype. It seems that in Fedora Core 4 they have
4427 set this on a number of new functions. No doubt there will be more in due
4430 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4431 specify a transport. However, if an address that was verified by such a
4432 router was the subject of a callout, Exim crashed because it tried to
4433 read the rcpt_include_affixes from the non-existent transport. Now it
4434 just assumes that the setting of that option is false. This bug was
4435 introduced by 4.51/PH/31.
4437 PH/28 Changed -d+all to exclude +memory, because that information is very
4438 rarely of interest, but it makes the output a lot bigger. People tend to
4439 do -d+all out of habit.
4441 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4442 code in os-type was giving problems when libc.so lives in lib64, like on
4445 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4446 aren't the modern standard, and it seems that some systems' include files
4447 don't always have them. Exim was already checking for some of the newer
4448 ones like T_AAAA, and defining it itself. I've added checks for all the
4449 record types that Exim uses.
4451 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4452 not automatically generating a new one, as it is supposed to. This
4453 prevented TLS from working. If the file did exist, but contained invalid
4454 data, a new version was generated, as expected. It was only the case of a
4455 non-existent file that was broken.
4457 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4458 with a change in libdomainkeys > 0.64.
4460 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4461 from DNS. If the selector record carries the flag, it now has
4462 precedence over the domain-wide flag.
4464 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4466 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4467 the use of a port name that isn't defined in /etc/services) occurred, the
4468 message was deferred as in a normal delivery, and thus remained on the
4469 spool, instead of being failed because of the mua_wrapper setting. This
4470 is now fixed, and I tidied up some of the mua_wrapper messages at the
4473 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4474 the messages in a hash of arrays rather than using individual hashes.
4475 This is a bit cleaner and results in dramatic memory savings, albeit
4476 at a slight CPU cost.
4478 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4479 as requested by Marc Sherman.
4481 SC/10 Eximstats: added histograms for user specified patterns as requested
4484 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4486 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4487 fopen() in the content-scanning modules that did not already have it.
4493 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4494 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4496 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4498 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4500 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4501 to test Sieve filters that use "vacation".
4503 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4504 that changes the way the GnuTLS parameters are stored in the cache file.
4505 The new format can be generated externally. For backward compatibility,
4506 if the data in the cache doesn't make sense, Exim assumes it has read an
4507 old-format file, and it generates new data and writes a new file. This
4508 means that you can't go back to an older release without removing the
4511 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4512 work if there are any delivery delays because "one_time" forces the
4513 parent to be marked "delivered", so its unseen clone is never tried
4514 again. For this reason, Exim now forbids the simultaneous setting of
4517 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4518 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4519 entry if you want to know the details. The fix, however, neglected to
4520 consider the case when local delivery batching is involved. The test for
4521 "previously delivered" was not happening when checking to see if an
4522 address could be batched with a previous (undelivered) one; under
4523 certain circumstances this could lead to multiple deliveries to the same
4526 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4527 in its include files, and this causes problems building Exim.
4529 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4530 header_syntax) but Exim was just ignoring anything given after a slash.
4531 In particular, this caused confusion with an attempt to use "verify =
4532 reverse_host_lookup/defer_ok". An error is now given when options are
4533 supplied for verify items that do not have them. (Maybe reverse_host_
4534 lookup should have a defer_ok option, but that's a different point.)
4536 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4537 defined by RFC 821) to 2048, because there were problems with some AUTH
4538 commands, and RFC 1869 says the size should be increased for extended
4539 SMTP commands that take arguments.
4541 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4544 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4545 "unknown" error; now it says that the functionality isn't in the binary.
4547 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4548 an address' error message when a string expansion fails (syntax or
4549 whatever). Otherwise the password may appear in the log. Following change
4550 PH/42 below, there is no longer a chance of it appearing in a bounce
4553 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4555 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4556 of its addresses was ever tried. (Bugzilla bug #2.)
4558 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4559 the result incorrectly in the debug output. (It correctly added a newline
4560 to what was transported.)
4562 TF/01 Added $received_time.
4564 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4565 commented out examples of how to interface to a virus scanner and to
4566 SpamAssassin. Also added commented examples of av_scanner and
4567 spamd_address settings.
4569 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4570 and controls are allowed in which ACLs. There were a couple of minor
4571 errors. Some of the entries in the conditions table (which is a table of
4572 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4573 negation of where the condition IS allowed.
4575 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4577 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4578 header file does not have a version number, so I've had to invent a new
4579 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4580 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4581 radiusclient), but it was contributed by a Radius user.
4583 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4584 files or directories, for OpenSSL.
4586 PH/19 When an Exim process that is running as root has to create an Exim log
4587 file, it does so in a subprocess that runs as exim:exim so as to get the
4588 ownership right at creation (otherwise, other Exim processes might see
4589 the file with the wrong ownership). There was no test for failure of this
4590 fork() call, which would lead to the process getting stuck as it waited
4591 for a non-existent subprocess. Forks do occasionally fail when resources
4592 run out. I reviewed all the other calls to fork(); they all seem to check
4595 PH/20 When checking for unexpected SMTP input at connect time (before writing
4596 the banner), Exim was not dealing correctly with a non-positive return
4597 from the read() function. If the client had disconnected by this time,
4598 the result was a log entry for a synchronization error with an empty
4599 string after "input=" when read() returned zero. If read() returned -1
4600 (an event I could not check), uninitialized data bytes were printed.
4601 There were reports of junk text (parts of files, etc) appearing after
4604 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4606 PH/22 Added support for macro redefinition, and (re)definition in between
4607 driver and ACL definitions.
4609 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4610 forgetting to use the resulting value; it was using the unexpanded value.
4612 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4613 hadn't been configured. The fix is from Juergen Kreileder, who
4614 understands it better than I do:
4616 "Here's what I see happening with three configured cyrus_sasl
4617 authenticators configured (plain, login, cram-md5):
4619 On startup auth_cyrus_sasl_init() gets called for each of these.
4620 This means three calls to sasl_listmech() without a specified mech_list.
4621 => SASL tests which mechs of all available mechs actually work
4622 => three warnings about OTP not working
4623 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4625 With the patch, sasl_listmech() also gets called three times. But now
4626 SASL's mech_list option is set to the server_mech specified in the the
4627 authenticator. Or in other words, the answer from sasl_listmech()
4628 gets limited to just the mech you're testing for (which is different
4630 => the return list contains just 'plain' or 'login', 'cram-md5' or
4631 nothing depending on the value of ob->server_mech.
4633 I've just tested the patch: Authentication still works fine,
4634 unavailable mechs specified in the exim configuration are still
4635 caught, and the auth.log warnings about OTP are gone."
4637 PH/25 When debugging is enabled, the contents of the command line are added
4638 to the debugging output, even when log_selector=+arguments is not
4641 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4642 answer is "GNU", and only if the return is "GNU/something" is the answer
4645 PH/27 $acl_verify_message is now set immediately after the failure of a
4646 verification in an ACL, and so is available in subsequent modifiers. In
4647 particular, the message can be preserved by coding like this:
4649 warn !verify = sender
4650 set acl_m0 = $acl_verify_message
4652 Previously, $acl_verify_message was set only while expanding "message"
4653 and "log_message" when a very denied access.
4655 PH/28 Modified OS/os.c-Linux with
4657 -#ifndef OS_LOAD_AVERAGE
4658 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4660 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4661 nomenclature these days.)
4663 PH/29 Installed patch from the Sieve maintainer that adds the options
4664 sieve_useraddress and sieve_subaddress to the redirect router.
4666 PH/30 In these circumstances:
4667 . Two addresses routed to the same list of hosts;
4668 . First host does not offer TLS;
4669 . First host accepts first address;
4670 . First host gives temporary error to second address;
4671 . Second host offers TLS and a TLS session is established;
4672 . Second host accepts second address.
4673 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4674 and peerdn, if requested) that were in fact used only for the second
4677 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4678 attention to any local part prefix or suffix that was matched by the
4679 router that accepted the address. It now behaves in the same way as it
4680 does for delivery: the affixes are removed from the local part unless
4681 rcpt_include_affixes is set on the transport.
4683 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4684 timeout during the DATA phase of an incoming message.
4686 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4687 applied a patch sanctioned by the Sieve maintainer.
4689 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4690 the uid or gid is negative. A case of a negative gid caused this to be
4691 noticed. The fix allows for either to be negative.
4693 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4694 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4697 PH/36 The change PH/12 above was broken. Fixed it.
4699 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4700 the grounds that routing the same address twice would always produce the
4701 same answer. This might have been true once, but it is certainly no
4702 longer true now. Routing a child address may depend on the previous
4703 routing that produced that child. Some complicated redirection strategies
4704 went wrong when messages had multiple recipients, and made Exim's
4705 behaviour dependent on the order in which the addresses were given.
4707 I have moved the duplicate checking until after the routing is complete.
4708 Exim scans the addresses that are assigned to local and remote
4709 transports, and removes any duplicates. This means that more work will be
4710 done, as duplicates will always all be routed, but duplicates are
4711 presumably rare, so I don't expect this is of any significance.
4713 For deliveries to pipes, files, and autoreplies, the duplicate checking
4714 still happens during the routing process, since they are not going to be
4717 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4718 It corrects a timeout issue with spamd. This is Ian's comment: "The
4719 background is that sometimes spamd either never reads data from a
4720 connection it has accepted, or it never writes response data. The exiscan
4721 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4722 blindly assumes that writes won't block so it may never time out."
4724 PH/39 Allow G after quota size as well as K and M.
4726 PH/40 The value set for $authenticated_id in an authenticator may not contain
4727 binary zeroes or newlines because the value is written to log lines and
4728 to spool files. There was no check on this. Now the value is run through
4729 the string_printing() function so that such characters are converted to
4730 printable escape sequences.
4732 PH/41 $message_linecount is a new variable that contains the total number of
4733 lines in the message. Compare $body_linecount, which is the count for the
4736 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4737 bounce and delay warning messages, except in certain special cases, which
4740 (a) An SMTP error message from a remote host;
4741 (b) A message specified in a :fail: redirection;
4742 (c) A message specified in a "fail" command in a system filter;
4743 (d) A message specified in a FAIL return from the queryprogram router;
4744 (e) A message specified by the cannot_route_message router option.
4746 In these cases only, Exim does include the error details in bounce and
4747 warning messages. There are also a few cases where bland messages such
4748 as "unrouteable address" or "local delivery error" are given.
4750 PH/43 $value is now also set for the "else" part of a ${run expansion.
4752 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4753 being worked on, but at least Exim now implements the latest version to
4756 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4757 process to complete was treated as a delivery failure, a timeout while
4758 writing the message to the pipe was logged, but erroneously treated as a
4759 successful delivery. Such timeouts include transport filter timeouts. For
4760 consistency with the overall process timeout, these timeouts are now
4761 treated as errors, giving rise to delivery failures by default. However,
4762 there is now a new Boolean option for the pipe transport called
4763 timeout_defer, which, if set TRUE, converts the failures into defers for
4764 both kinds of timeout. A transport filter timeout is now identified in
4767 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4768 systems where "make" and "gmake" are different, calling "gmake" at top
4769 level broke things. I've arranged for the value of $(MAKE) to be passed
4770 from the Makefile to this script so that it can call the same version of
4774 A note about Exim versions 4.44 and 4.50
4775 ----------------------------------------
4777 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4778 changes of various kinds. As a consequence, a big documentation update was
4779 needed. This delayed the release for rather longer than seemed good, especially
4780 in the light of a couple of (minor) security issues. Therefore, the changes
4781 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4782 release. So 4.44 and 4.50 are in effect two different branches that both start
4785 I have left the 4.50 change log unchanged; it contains all the changes since
4786 4.43. The change log for 4.44 is below; many of its items are identical to
4787 those for 4.50. This seems to be the most sensible way to preserve the
4788 historical information.
4794 1. Minor wording change to the doc/README.SIEVE file.
4796 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4797 computation of the current number of files was incorrect.
4799 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4800 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4803 4. Give more explanation in the error message when the command for a transport
4804 filter fails to execute.
4806 5. There are several places where Exim runs a non-Exim command in a
4807 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4808 was being done only for the command run by the queryprogram router. It is
4809 now done for all such subprocesses. The other cases are: ${run, transport
4810 filters, and the commands run by the lmtp and pipe transports.
4812 6. Added CONFIGURE_GROUP build-time option.
4814 7. Some older OS have a limit of 256 on the maximum number of file
4815 descriptors. Exim was using setrlimit() to set 1000 as a large value
4816 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4817 systems. I've change it so that if it can't get 1000, it tries for 256.
4819 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4820 was an oversight, and furthermore, ever since the addition of extra
4821 controls (e.g. 4.43/32), the checks on when to allow different forms of
4822 "control" were broken. There should now be diagnostics for all cases when a
4823 control that does not make sense is encountered.
4825 9. Added the /retain_sender option to "control=submission".
4827 10. $recipients is now available in the predata ACL (oversight).
4829 11. Tidy the search cache before the fork to do a delivery from a message
4830 received from the command line. Otherwise the child will trigger a lookup
4831 failure and thereby defer the delivery if it tries to use (for example) a
4832 cached ldap connection that the parent has called unbind on.
4834 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4835 of $address_data from the recipient verification was clobbered by the
4836 sender verification.
4838 13. The value of address_data from a sender verification is now available in
4839 $sender_address_data in subsequent conditions in the ACL statement.
4841 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4843 15. Added a new option "connect=<time>" to callout options, to set a different
4846 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4847 was its contents. (It was OK if the option was not defined at all.)
4849 17. A "Completed" log line is now written for messages that are removed from
4850 the spool by the -Mrm option.
4852 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4853 information about exactly what failed.
4855 19. Added -dd to debug only the daemon process.
4857 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4858 handles timeouts, both on the server side and network timeouts. Renamed the
4859 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4861 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4862 It is now set to "smtps".
4864 22. $host_address is now set to the target address during the checking of
4865 ignore_target_hosts.
4867 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4868 being passed; this would have caused $sender_host_name to have been used if
4869 matching the list had actually called for a host name (not very likely,
4870 since this list is usually IP addresses). A host name is now passed as
4873 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4874 code that specifies a non-restarting handler (typically sigaction() in
4875 modern systems) in an attempt to fix a rare and obscure crash bug.
4877 25. Narrowed the window for a race in the daemon that could cause it to ignore
4878 SIGCHLD signals. This is not a major problem, because they are used only to
4879 wake it up if nothing else does.
4881 26. A malformed maildirsize file could cause Exim to calculate negative values
4882 for the mailbox size or file count. Odd effects could occur as a result.
4883 The maildirsize information is now recalculated if the size or filecount
4886 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4887 support for a long time. Removed HAVE_SYS_VFS_H.
4889 28. Installed the latest version of exipick from John Jetmore.
4891 29. In an address list, if the pattern was not a regular expression, an empty
4892 subject address (from a bounce message) matched only if the pattern was an
4893 empty string. Non-empty patterns were not even tested. This was the wrong
4894 because it is perfectly reasonable to use an empty address as part of a
4895 database query. An empty address is now tested by patterns that are
4896 lookups. However, all the other forms of pattern expect the subject to
4897 contain a local part and a domain, and therefore, for them, an empty
4898 address still always fails if the pattern is not itself empty.
4900 30. Exim went into a mad DNS loop when attempting to do a callout where the
4901 host was specified on an smtp transport, and looking it up yielded more
4902 than one IP address.
4904 31. Re-factored the code for checking spool and log partition space into a
4905 function that finds that data and another that does the check. The former
4906 is then used to implement four new variables: $spool_space, $log_space,
4907 $spool_inodes, and $log_inodes.
4909 32. The RFC2047 encoding function was originally intended for short strings
4910 such as real names; it was not keeping to the 75-character limit for
4911 encoded words that the RFC imposes. It now respects the limit, and
4912 generates multiple encoded words if necessary. To be on the safe side, I
4913 have increased the buffer size for the ${rfc2047: expansion operator from
4916 33. It is now permitted to omit both strings after an "if" condition; if the
4917 condition is true, the result is "true". As before, when the second string
4918 is omitted, a false condition yields an empty string. This makes it less
4919 cumbersome to write custom ACL and router conditions.
4921 34. Failure to deliver a bounce message always caused it to be frozen, even if
4922 there was an errors_to setting on the router. The errors_to setting is now
4925 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4926 canonical form (fully expanded) before being placed in
4927 $sender_host_address.
4929 36. The table in the code that translates DNS record types into text (T_A to
4930 "A" for instance) was missing entries for NS and CNAME. It is just possible
4931 that this could have caused confusion if both these types were looked up
4932 for the same domain, because the text type is used as part of Exim's
4933 per-process caching. But the chance of anyone hitting this buglet seems
4936 37. The dnsdb lookup has been extended in a number of ways.
4938 (1) There is a new type, "zns", which walks up the domain tree until it
4939 finds some nameserver records. It should be used with care.
4941 (2) There is a new type, "mxh", which is like "mx" except that it returns
4942 just the host names, not the priorities.
4944 (3) It is now possible to give a list of domains (or IP addresses) to be
4945 looked up. The behaviour when one of the lookups defers can be
4946 controlled by a keyword.
4948 (4) It is now possible to specify the separator character for use when
4949 multiple records are returned.
4951 38. The dnslists ACL condition has been extended: it is now possible to supply
4952 a list of IP addresses and/or domains to be looked up in a particular DNS
4955 39. Added log_selector=+queue_time_overall.
4957 40. When running the queue in the test harness, wait just a tad after forking a
4958 delivery process, to get repeatability of debugging output.
4960 41. Include certificate and key file names in error message when GnuTLS fails
4961 to set them up, because the GnuTLS error message doesn't include the name
4962 of the failing file when there is a problem reading it.
4964 42. Allow both -bf and -bF in the same test run.
4966 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4968 44. The "Exiscan patch" is now merged into the mainline Exim source.
4970 45. Sometimes the final signoff response after QUIT could fail to get
4971 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4972 < 0 before doing a fflush(). This bug looks as though it goes back to the
4973 introduction of TLS in release 3.20, but "sometimes" must have been rare
4974 because the tests only now provoked it.
4976 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4977 (this can affect the format of dates).
4979 47. exim_tidydb, when checking for the continued existence of a message for
4980 which it has found a message-specific retry record, was not finding
4981 messages that were in split spool directories. Consequently, it was
4982 deleting retry records that should have stayed in existence.
4984 48. Steve fixed some bugs in eximstats.
4986 49. The SPA authentication driver was not abandoning authentication and moving
4987 on to the next authenticator when an expansion was forced to fail,
4988 contradicting the general specification for all authenticators. Instead it
4989 was generating a temporary error. It now behaves as specified.
4991 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4992 (the order specifies the preference for clients). The order is now AES256,
4993 AES128, 3DES, ARCFOUR128.
4995 51. Small patch to Sieve code - explicitly set From: when generating an
4998 52. Exim crashed if a remote delivery caused a very long error message to be
4999 recorded - for instance if somebody sent an entire SpamAssassin report back
5000 as a large number of 550 error lines. This bug was coincidentally fixed by
5001 increasing the size of one of Exim's internal buffers (big_buffer) that
5002 happened as part of the Exiscan merge. However, to be on the safe side, I
5003 have made the code more robust (and fixed the comments that describe what
5006 53. Now that there can be additional text after "Completed" in log lines (if
5007 the queue_time_overall log selector is set), a one-byte patch to exigrep
5008 was needed to allow it to recognize "Completed" as not the last thing in
5011 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5012 patch that reportedly fixes this has been added. I am not expert enough to
5013 create a test for it. This is what the patch creator wrote:
5015 "I found a little strange behaviour of ldap code when working with
5016 Windows 2003 AD Domain, where users was placed in more than one
5017 Organization Units. When I tried to give exim partial DN, the exit code
5018 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5019 But simultaneously result of request was absolutely normal ldap result,
5020 so I produce this patch..."
5022 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5023 REFERENCE, so I have modified the code to exclude the patch when that macro
5026 55. Some experimental protocols are using DNS PTR records for new purposes. The
5027 keys for these records are domain names, not reversed IP addresses. The
5028 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5029 leaves it alone. Component reversal etc. now happens only for IP addresses.
5032 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5034 57. Double the size of the debug message buffer (to 2048) so that more of very
5035 long debug lines gets shown.
5037 58. The exicyclog utility now does better if the number of log files to keep
5038 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5040 59. Two changes related to the smtp_active_hostname option:
5042 (1) $smtp_active_hostname is now available as a variable.
5043 (2) The default for smtp_banner uses $smtp_active_hostname instead
5044 of $primary_hostname.
5046 60. The host_aton() function is supposed to be passed a string that is known
5047 to be a valid IP address. However, in the case of IPv6 addresses, it was
5048 not checking this. This is a hostage to fortune. Exim now panics and dies
5049 if the condition is not met. A case was found where this could be provoked
5050 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5051 components; fortuitously, this particular loophole had already been fixed
5052 by change 4.50/55 above.
5054 If there are any other similar loopholes, the new check in host_aton()
5055 itself should stop them being exploited. The report I received stated that
5056 data on the command line could provoke the exploit when Exim was running as
5057 exim, but did not say which command line option was involved. All I could
5058 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5059 running as the user.
5062 61. There was a buffer overflow vulnerability in the SPA authentication code
5063 (which came originally from the Samba project). I have added a test to the
5064 spa_base64_to_bits() function which I hope fixes it.
5067 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5068 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5070 63. The daemon start-up calls getloadavg() while still root for those OS that
5071 need the first call to be done as root, but it missed one case: when
5072 deliver_queue_load_max is set with deliver_drop_privilege. This is
5073 necessary for the benefit of the queue runner, because there is no re-exec
5074 when deliver_drop_privilege is set.
5076 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5077 This has been fixed.
5079 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5080 was in use, was not putting the data itself into the right store pool;
5081 consequently, it could be overwritten for a subsequent message in the same
5082 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5085 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5087 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5088 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5089 the function were treating the return as a boolean value, which happened to
5090 work because 0=false and not-0=true, but is not correct code.
5092 68. The host_aton() function was not handling scoped IPv6 addresses (those
5093 with, for example, "%eth0" on the end) correctly.
5095 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5096 negated items (that is, ~something) in unsigned ints. Some compilers
5097 apparently mutter when there is no cast.
5099 70. If an address verification called from an ACL failed, and did not produce a
5100 user-specific message (i.e. there was only a "system" message), nothing was
5101 put in $acl_verify_message. In this situation, it now puts the system
5104 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5105 session; change 4.31/43 added the unwanted input to the log line - except
5106 that it did not do this in the start of session case. It now does.
5108 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5109 This is wrong and can cause the other end to generate a synchronization
5110 error if it is another Exim or anything else that does the synchronization
5111 check. A QUIT command is no longer sent after a timeout.
5113 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5114 during host lookups.
5116 74. The defer_ok option of callout verification was not working if it was used
5117 when verifying addresses in header lines, that is, for this case:
5119 verify = header_sender/callout=defer_ok
5121 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5122 those file descriptors could be used for SMTP connections. If anything
5123 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5124 could be sent to the SMTP client, causing chaos. The daemon now opens
5125 stdin, stdout, and stderr to /dev/null when it puts itself into the
5128 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5129 log by default. The user can override this with suitable Perl magic.
5131 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5132 the log message when discard triggers, was not working for the DATA ACL or
5133 for the non-SMTP ACL.
5135 78. Error message wording change in sieve.c.
5137 79. If smtp_accept_max_per_host was set, the number of connections could be
5138 restricted to fewer than expected, because the daemon was trying to set up
5139 a new connection before checking whether the processes handling previous
5140 connections had finished. The check for completed processes is now done
5141 earlier. On busy systems, this bug wouldn't be noticed because something
5142 else would have woken the daemon, and it would have reaped the completed
5145 80. If a message was submitted locally by a user whose login name contained one
5146 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5147 It caused a spool format error. I have fixed the spool reading code. A
5148 related problem was that the "from" clause in the Received: line became
5149 illegal because of the space(s). It is now covered by ${quote_local_part.
5151 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5154 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5156 83. Patch from Sieve maintainer to fix unterminated string problem in
5157 "vacation" handling.
5159 84. Some minor changes to the Linux configuration files to help with other
5160 OS variants using glibc.
5162 85. One more patch for Sieve to update vacation handling to latest spec.
5165 ----------------------------------------------------
5166 See the note above about the 4.44 and 4.50 releases.
5167 ----------------------------------------------------
5173 1. Change 4.43/35 introduced a bug that caused file counts to be
5174 incorrectly computed when quota_filecount was set in an appendfile
5177 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5178 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5181 3. Give more explanation in the error message when the command for a transport
5182 filter fails to execute.
5184 4. There are several places where Exim runs a non-Exim command in a
5185 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5186 was being done only for the command run by the queryprogram router. It is
5187 now done for all such subprocesses. The other cases are: ${run, transport
5188 filters, and the commands run by the lmtp and pipe transports.
5190 5. Some older OS have a limit of 256 on the maximum number of file
5191 descriptors. Exim was using setrlimit() to set 1000 as a large value
5192 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5193 systems. I've change it so that if it can't get 1000, it tries for 256.
5195 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5196 was an oversight, and furthermore, ever since the addition of extra
5197 controls (e.g. 4.43/32), the checks on when to allow different forms of
5198 "control" were broken. There should now be diagnostics for all cases when a
5199 control that does not make sense is encountered.
5201 7. $recipients is now available in the predata ACL (oversight).
5203 8. Tidy the search cache before the fork to do a delivery from a message
5204 received from the command line. Otherwise the child will trigger a lookup
5205 failure and thereby defer the delivery if it tries to use (for example) a
5206 cached ldap connection that the parent has called unbind on.
5208 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5209 of $address_data from the recipient verification was clobbered by the
5210 sender verification.
5212 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5213 was its contents. (It was OK if the option was not defined at all.)
5215 11. A "Completed" log line is now written for messages that are removed from
5216 the spool by the -Mrm option.
5218 12. $host_address is now set to the target address during the checking of
5219 ignore_target_hosts.
5221 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5222 being passed; this would have caused $sender_host_name to have been used if
5223 matching the list had actually called for a host name (not very likely,
5224 since this list is usually IP addresses). A host name is now passed as
5227 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5228 code that specifies a non-restarting handler (typically sigaction() in
5229 modern systems) in an attempt to fix a rare and obscure crash bug.
5231 15. Narrowed the window for a race in the daemon that could cause it to ignore
5232 SIGCHLD signals. This is not a major problem, because they are used only to
5233 wake it up if nothing else does.
5235 16. A malformed maildirsize file could cause Exim to calculate negative values
5236 for the mailbox size or file count. Odd effects could occur as a result.
5237 The maildirsize information is now recalculated if the size or filecount
5240 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5241 support for a long time. Removed HAVE_SYS_VFS_H.
5243 18. Updated exipick to current release from John Jetmore.
5245 19. Allow an empty sender to be matched against a lookup in an address list.
5246 Previously the only cases considered were a regular expression, or an
5249 20. Exim went into a mad DNS lookup loop when doing a callout where the
5250 host was specified on the transport, if the DNS lookup yielded more than
5253 21. The RFC2047 encoding function was originally intended for short strings
5254 such as real names; it was not keeping to the 75-character limit for
5255 encoded words that the RFC imposes. It now respects the limit, and
5256 generates multiple encoded words if necessary. To be on the safe side, I
5257 have increased the buffer size for the ${rfc2047: expansion operator from
5260 22. Failure to deliver a bounce message always caused it to be frozen, even if
5261 there was an errors_to setting on the router. The errors_to setting is now
5264 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5265 canonical form (fully expanded) before being placed in
5266 $sender_host_address.
5268 24. Updated eximstats to version 1.33
5270 25. Include certificate and key file names in error message when GnuTLS fails
5271 to set them up, because the GnuTLS error message doesn't include the name
5272 of the failing file when there is a problem reading it.
5274 26. Expand error message when OpenSSL has problems setting up cert/key files.
5277 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5278 (this can affect the format of dates).
5280 28. exim_tidydb, when checking for the continued existence of a message for
5281 which it has found a message-specific retry record, was not finding
5282 messages that were in split spool directories. Consequently, it was
5283 deleting retry records that should have stayed in existence.
5285 29. eximstats updated to version 1.35
5286 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5287 1.35 - bugfix such that pie charts by volume are generated correctly
5289 30. The SPA authentication driver was not abandoning authentication and moving
5290 on to the next authenticator when an expansion was forced to fail,
5291 contradicting the general specification for all authenticators. Instead it
5292 was generating a temporary error. It now behaves as specified.
5294 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5295 (the order specifies the preference for clients). The order is now AES256,
5296 AES128, 3DES, ARCFOUR128.
5298 31. Small patch to Sieve code - explicitly set From: when generating an
5301 32. Exim crashed if a remote delivery caused a very long error message to be
5302 recorded - for instance if somebody sent an entire SpamAssassin report back
5303 as a large number of 550 error lines. This bug was coincidentally fixed by
5304 increasing the size of one of Exim's internal buffers (big_buffer) that
5305 happened as part of the Exiscan merge. However, to be on the safe side, I
5306 have made the code more robust (and fixed the comments that describe what
5309 33. Some experimental protocols are using DNS PTR records for new purposes. The
5310 keys for these records are domain names, not reversed IP addresses. The
5311 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5312 leaves it alone. Component reversal etc. now happens only for IP addresses.
5315 34. The host_aton() function is supposed to be passed a string that is known
5316 to be a valid IP address. However, in the case of IPv6 addresses, it was
5317 not checking this. This is a hostage to fortune. Exim now panics and dies
5318 if the condition is not met. A case was found where this could be provoked
5319 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5320 components; fortuitously, this particular loophole had already been fixed
5321 by change 4.50/55 or 4.44/33 above.
5323 If there are any other similar loopholes, the new check in host_aton()
5324 itself should stop them being exploited. The report I received stated that
5325 data on the command line could provoke the exploit when Exim was running as
5326 exim, but did not say which command line option was involved. All I could
5327 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5328 running as the user.
5331 35. There was a buffer overflow vulnerability in the SPA authentication code
5332 (which came originally from the Samba project). I have added a test to the
5333 spa_base64_to_bits() function which I hope fixes it.
5336 36. The daemon start-up calls getloadavg() while still root for those OS that
5337 need the first call to be done as root, but it missed one case: when
5338 deliver_queue_load_max is set with deliver_drop_privilege. This is
5339 necessary for the benefit of the queue runner, because there is no re-exec
5340 when deliver_drop_privilege is set.
5342 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5343 was in use, was not putting the data itself into the right store pool;
5344 consequently, it could be overwritten for a subsequent message in the same
5345 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5348 38. Sometimes the final signoff response after QUIT could fail to get
5349 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5350 < 0 before doing a fflush(). This bug looks as though it goes back to the
5351 introduction of TLS in release 3.20, but "sometimes" must have been rare
5352 because the tests only now provoked it.
5358 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5359 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5360 Now it returns an integer. A number of calls were still expecting a T/F
5361 return. Fortuitously, in all cases, the tests worked in OK situations,
5362 which is the norm. However, things would have gone wrong on any write
5363 failures on the smtp file descriptor. This function is used when sending
5364 messages over SMTP and also when doing verify callouts.
5366 2. When Exim is called to do synchronous delivery of a locally submitted
5367 message (the -odf or -odi options), it no longer closes stderr before doing
5370 3. Implemented the mua_wrapper option.
5372 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5374 5. Implemented the functions header_remove(), header_testname(),
5375 header_add_at_position(), and receive_remove_recipient(), and exported them
5378 6. If an ACL "warn" statement specified the addition of headers, Exim already
5379 inserted X-ACL-Warn: at the start if there was no header name. However, it
5380 was not making this test for the second and subsequent header lines if
5381 there were newlines in the string. This meant that an invalid header could
5382 be inserted if Exim was badly configured.
5384 7. Allow an ACL "warn" statement to add header lines at the start or after all
5385 the Received: headers, as well as at the end.
5387 8. Added the rcpt_4xx retry error code.
5389 9. Added postmaster_mailfrom=xxx to callout verification option.
5391 10. Added mailfrom=xxxx to the callout verification option, for verify=
5394 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5395 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5397 12. Inserted some casts to stop certain compilers warning when using pointer
5398 differences as field lengths or precisions in printf-type calls (mostly
5399 affecting debugging statements).
5401 13. Added optional readline() support for -be (dynamically loaded).
5403 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5404 same clock tick as a message's arrival, so that its received time was the
5405 same as the "first fail" time on the retry record, and that message
5406 remained on the queue past the ultimate address timeout, every queue runner
5407 would try a delivery (because it was past the ultimate address timeout) but
5408 after another failure, the ultimate address timeout, which should have then
5409 bounced the address, did not kick in. This was a "< instead of <=" error;
5410 in most cases the first failure would have been in the next clock tick
5411 after the received time, and all would be well.
5413 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5414 being recognized when the domain list was tested by the match_domain
5415 condition in an expansion string.
5417 16. Added the ${str2b64: operator.
5419 17. Exim was always calling setrlimit() to set a large limit for the number of
5420 processes, without checking whether the existing limit was already
5421 adequate. (It did check for the limit on file descriptors.) Furthermore,
5422 errors from getrlimit() and setrlimit() were being ignored. Now they are
5423 logged to the main and panic logs, but Exim does carry on, to try to do its
5424 job under whatever limits there are.
5426 18. Imported PCRE 5.0.
5428 19. Trivial typo in log message " temporarily refused connection" (the leading
5431 20. If the log selector return_path_on_delivery was set and an address was
5432 redirected to /dev/null, the delivery process crashed because it assumed
5433 that a return path would always be set for a "successful" delivery. In this
5434 case, the whole delivery is bypassed as an optimization, and therefore no
5437 21. Internal re-arrangement: the function for sending a challenge and reading
5438 a response while authentication was assuming a zero-terminated challenge
5439 string. It's now changed to take a pointer and a length, to allow for
5440 binary data in such strings.
5442 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5444 23. Exim was not respecting finduser_retries when seeking the login of the
5445 uid under which it was called; it was always trying 10 times. (The default
5446 setting of finduser_retries is zero.) Also, it was sleeping after the final
5447 failure, which is pointless.
5449 24. Implemented tls_on_connect_ports.
5451 25. Implemented acl_smtp_predata.
5453 26. If the domain in control=submission is set empty, Exim assumes that the
5454 authenticated id is a complete email address when it generates From: or
5455 Sender: header lines.
5457 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5458 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5459 chown and chgrp in /bin and hostname in /usr/bin.
5461 28. Exim was keeping the "process log" file open after each use, just as it
5462 does for the main log. This opens the possibility of it remaining open for
5463 long periods when the USR1 signal hits a daemon. Occasional processlog
5464 errors were reported, that could have been caused by this. Anyway, it seems
5465 much more sensible not to leave this file open at all, so that is what now
5468 29. The long-running daemon process does not normally write to the log once it
5469 has entered its main loop, and it closes the log before doing so. This is
5470 so that log files can straightforwardly be renamed and moved. However,
5471 there are a couple of unusual error situations where the daemon does write
5472 log entries, and I had neglected to close the log afterwards.
5474 30. The text of an SMTP error response that was received during a remote
5475 delivery was being truncated at 512 bytes. This is too short for some of
5476 the long messages that one sometimes sees. I've increased the limit to
5479 31. It is now possible to make retry rules that apply only when a message has a
5480 specific sender, in particular, an empty sender.
5482 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5483 it possible to be selective about when SMTP synchronization is enforced.
5485 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5487 32. Implemented hosts_connection_nolog.
5489 33. Added an ACL for QUIT.
5491 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5494 35. Added mailbox_size and mailbox_filecount to appendfile.
5496 36. Added control = no_multiline_responses to ACLs.
5498 37. There was a bug in the logic of the code that waits for the clock to tick
5499 in the case where the clock went backwards by a substantial amount such
5500 that the microsecond fraction of "now" was more than the microsecond
5501 fraction of "then" (but the whole seconds number was less).
5503 38. Added support for the libradius Radius client library this is found on
5504 FreeBSD (previously only the radiusclient library was supported).
5510 1. When certain lookups returned multiple values in the form name=value, the
5511 quoting of the values was not always being done properly. Specifically:
5512 (a) If the value started with a double quote, but contained no whitespace,
5514 (b) If the value contained whitespace other than a space character (i.e.
5515 tabs or newlines or carriage returns) it was not quoted.
5516 This fix has been applied to the mysql and pgsql lookups by writing a
5517 separate quoting function and calling it from the lookup code. The fix
5518 should probably also be applied to nisplus, ibase and oracle lookups, but
5519 since I cannot test any of those, I have not disturbed their existing code.
5521 2. A hit in the callout cache for a specific address caused a log line with no
5522 reason for rejecting RCPT. Now it says "Previous (cached) callout
5523 verification failure".
5525 3. There was an off-by-one bug in the queryprogram router. An over-long
5526 return line was truncated at 256 instead of 255 characters, thereby
5527 overflowing its buffer with the terminating zero. As well as fixing this, I
5528 have increased the buffer size to 1024 (and made a note to document this).
5530 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5531 when Exim is waiting for an SMTP response from a remote server, Exim
5532 restarts its select() call on the socket, thereby resetting its timeout.
5533 This is not a problem when such interrupts are rare. Somebody set up a cron
5534 job to run exiwhat every 2 minutes, which is less than the normal select()
5535 timeout (5 or 10 minutes). This meant that the select() timeout never
5536 kicked in because it was always reset. I have fixed this by comparing the
5537 time when an interrupt arrives with the time at the start of the first call
5538 to select(). If more time than the timeout has elapsed, the interrupt is
5539 treated as a timeout.
5541 5. Some internal re-factoring in preparation for the addition of Sieve
5542 extensions (by MH). In particular, the "personal" test is moved to a
5543 separate function, and given an option for scanning Cc: and Bcc: (which is
5544 not set for Exim filters).
5546 6. When Exim created an email address using the login of the caller as the
5547 local part (e.g. when creating a From: or Sender: header line), it was not
5548 quoting the local part when it contained special characters such as @.
5550 7. Installed new OpenBSD configuration files.
5552 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5553 try to make them clearer.
5555 9. Callout options, other than the timeout value, were being ignored when
5556 verifying sender addresses in header lines. For example, when using
5558 verify = header_sender/callout=no_cache
5560 the cache was (incorrectly) being used.
5562 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5563 only the Cygwin environment.
5565 11. When return_path_on_delivery was set as a log selector, if different remote
5566 addresses in the same message used different return paths and parallel
5567 remote delivery occurred, the wrong values would sometimes be logged.
5568 (Whenever a remote delivery process finished, the return path value from
5569 the most recently started remote delivery process was logged.)
5571 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5572 lines when AUTH and/or TLS are in use. This is the "received protocol"
5573 field. Exim used to use "asmtp" for authenticated SMTP, without any
5574 indication (in the protocol name) for TLS use. Now it follows the RFC and
5575 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5576 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5577 names appear in log lines as well as in Received: header lines.
5579 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5580 extensions, and comparison tests, and to fix some bugs.
5582 14. Changes to the "personal" filter test:
5584 (1) The test was buggy in that it was just doing the equivalent of
5585 "contains" tests on header lines. For example, if a user's address was
5586 anne@some.where, the "personal" test would incorrectly be true for
5588 To: susanne@some.where
5590 This test is now done by extracting each address from the header in turn,
5591 and checking the entire address. Other tests that are part of "personal"
5592 are now done using regular expressions (for example, to check local parts
5593 of addresses in From: header lines).
5595 (2) The list of non-personal local parts in From: addresses has been
5596 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5597 taken from the Sieve specification recommendations.
5599 (3) If the message contains any header line starting with "List-" it is
5600 treated as non-personal.
5602 (4) The test for "circular" in the Subject: header line has been removed
5603 because it now seems ill-conceived.
5605 15. Minor typos in src/EDITME comments corrected.
5607 16. Installed latest exipick from John Jetmore.
5609 17. If headers_add on a router specified a text string that was too long for
5610 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5611 of string_sprintf() is now avoided.
5613 18. $message_body_size was not set (it was always zero) when running the DATA
5614 ACL and the local_scan() function.
5616 19. For the "mail" command in an Exim filter, no default was being set for
5617 the once_repeat time, causing a random time value to be used if "once" was
5618 specified. (If the value happened to be <= 0, no repeat happened.) The
5619 default is now 0s, meaning "never repeat". The "vacation" command was OK
5620 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5621 (I found it when inspecting the code).
5623 20. There is now an overall timeout for performing a callout verification. It
5624 defaults to 4 times the callout timeout, which applies to individual SMTP
5625 commands during the callout. The overall timeout applies when there is more
5626 than one host that can be tried. The timeout is checked before trying the
5627 next host. This prevents very long delays if there are a large number of
5628 hosts and all are timing out (e.g. when the network connections are timing
5629 out). The value of the overall timeout can be changed by specifying an
5630 additional sub-option for "callout", called "maxwait". For example:
5632 verify = sender/callout=5s,maxwait=20s
5634 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5635 to the end before writing, but this should make it even safer).
5637 22. Exim was forgetting that it had advertised PIPELINING for the second and
5638 subsequent messages on an SMTP connection. It was also not resetting its
5639 memory on STARTTLS and an internal HELO.
5641 23. When Exim logs an SMTP synchronization error within a session, it now
5642 records whether PIPELINING has been advertised or not.
5644 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5645 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5646 rather than long int.
5648 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5650 26. Added the never_mail option to autoreply.
5656 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5657 crash if the getsockname() call failed; this can happen if a connection is
5658 closed very soon after it is established. The problem was simply in the
5659 order in which certain operations were done, causing Exim to try to write
5660 to the SMTP stream before it had set up the file descriptor. The bug has
5661 been fixed by making things happen in the correct order.
5667 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5668 before the connection was closed, thus losing the rejection response.
5670 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5671 some early Solaris releases, but causes trouble in current releases where
5672 socklen_t is defined.
5674 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5677 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5680 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5681 that releasing the top of it at the end releases what was used for sub-
5682 expansions (unless the block got too big). However, discard this block if
5683 the first thing is a variable or header, so that we can use its block when
5684 it is dynamic (useful for very large $message_headers, for example).
5686 6. Lookups now cache *every* query, not just the most recent. A new, separate
5687 store pool is used for this. It can be recovered when all lookup caches are
5688 flushed. Lookups now release memory at the end of their result strings.
5689 This has involved some general refactoring of the lookup sources.
5691 7. Some code has been added to the store_xxx() functions to reduce the amount
5692 of flapping under certain conditions.
5694 8. log_incoming_interface used to affect only the <= reception log lines. Now
5695 it causes the local interface and port to be added to several more SMTP log
5696 lines, for example "SMTP connection from", and rejection lines.
5698 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5700 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5702 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5703 could be overwritten at the end of the current message (or the start of a
5704 new message if it was set in a HELO ACL). The value is now preserved for
5705 the duration of the SMTP connection.
5707 12. If a transport had a headers_rewrite setting, and a matching header line
5708 contained an unqualified address, that address was qualified, even if it
5709 did not match any rewriting rules. The underlying bug was that the values
5710 of the flags that permit the existence of unqualified sender and recipient
5711 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5712 non-local messages, and by -bnq for local messages) were not being
5713 preserved with the message after it was received.
5715 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5716 "next input=" as part of the text comprising the host identity instead of
5717 the correct text. The code was using the same buffer for two different
5718 strings. However, depending on which order the printing function evaluated
5719 its arguments, the bug did not always show up. Under Linux, for example, my
5720 test suite worked just fine.
5722 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5723 doesn't work with some older versions of Perl. It has been changed to "my",
5724 which in any case is probably the better facility to use.
5726 15. A really picky compiler found some instances of statements for creating
5727 error messages that either had too many or two few arguments for the format
5730 16. The size of the buffer for calls to the DNS resolver has been increased
5731 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5732 for addresses that have a lot of PTR records. This alleviates a problem; it
5733 does not fully solve it.
5735 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5736 buffer now truncates the list and logs the incident, which is the same
5737 action as happens when Exim is looking up a host name and its aliases.
5738 Previously in this situation something unpredictable would happen;
5739 sometimes it was "internal error: store_reset failed".
5741 18. If a server dropped the connection unexpectedly when an Exim client was
5742 using GnuTLS and trying to read a response, the client delivery process
5743 crashed while trying to generate an error log message.
5745 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5746 string, for example:
5748 warn message = H1: something\nH2: something
5750 the text was added as a single header line from Exim's point of view
5751 though it ended up OK in the delivered message. However, searching for the
5752 second and subsequent header lines using $h_h2: did not work. This has been
5753 fixed. Similarly, if a system filter added multiple headers in this way,
5754 the routers could not see them.
5756 20. Expanded the error message when iplsearch is called with an invalid key to
5757 suggest using net-iplsearch in a host list.
5759 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5760 ACLs are no longer actually imposed (and a message to that effect is
5763 22. If a "gecos" field in a passwd entry contained escaped characters, in
5764 particular, if it contained a \" sequence, Exim got it wrong when building
5765 a From: or a Sender: header from that name. A second bug also caused
5766 incorrect handling when an unquoted " was present following a character
5767 that needed quoting.
5769 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5770 was not being matched caselessly.
5772 24. Arranged for all hyphens in the exim.8 source to be escaped with
5775 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5776 properly. Recipient callout cache records were still being keyed to include
5777 the sender, even when use_sender was set false. This led to far more
5778 callouts that were necessary. The sender is no longer included in the key
5779 when use_sender is false.
5781 26. Added "control = submission" modifier to ACLs.
5783 27. Added the ${base62d: operator to decode base 62 numbers.
5785 28. dnsdb lookups can now access SRV records.
5787 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5788 the configuration file.
5790 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5791 (-v) mode. This makes the output for a verbose queue run more intelligible.
5793 31. Added a use_postmaster feature to recipient callouts.
5795 32. Added the $body_zerocount variable, containing the number of binary zero
5796 bytes in the message body.
5798 33. The time of last modification of the "new" subdirectory is now used as the
5799 "mailbox time last read" when there is a quota error for a maildir
5802 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5804 35. Added +ignore_unknown as a special item in host lists.
5806 36. Code for decoding IPv6 addresses in host lists is now included, even if
5807 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5808 address was recognized as an IP address, but was then not correctly decoded
5809 into binary, causing unexpected and incorrect effects when compared with
5816 1. Very minor rewording of debugging text in manualroute to say "list of
5817 hosts" instead of "hostlist".
5819 2. If verify=header_syntax was set, and a header line with an unqualified
5820 address (no domain) and a large number of spaces between the end of the
5821 name and the colon was received, the reception process suffered a buffer
5822 overflow, and (when I tested it) crashed. This was caused by some obsolete
5823 code that should have been removed. The fix is to remove it!
5825 3. When running in the test harness, delay a bit after writing a bounce
5826 message to get a bit more predictability in the log output.
5828 4. Added a call to search_tidyup() just before forking a reception process. In
5829 theory, someone could use a lookup in the expansion of smtp_accept_max_
5830 per_host which, without the tidyup, could leave open a database connection.
5832 5. Added the variables $recipient_data and $sender_data which get set from a
5833 lookup success in an ACL "recipients" or "senders" condition, or a router
5834 "senders" option, similar to $domain_data and $local_part_data.
5836 6. Moved the writing of debug_print from before to after the "senders" test
5839 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5840 problems for message scanning, either using a data ACL, or using
5841 local_scan() because the Received: header was not generated till after they
5842 were called (in order to set the time as the time of reception completion).
5843 I have revised the way this works. The header is now generated after the
5844 body is received, but before the ACL or local_scan() are called. After they
5845 are run, the timestamp in the header is updated.
5851 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5852 before starting a queue runner without re-exec. This happened only when
5853 deliver_drop_privilege was set or when the Exim user was set to root. The
5854 effect of the bug was that timeouts during subsequent deliveries caused
5855 crashes instead of being properly handled. The handler is now left at its
5856 default (and expected) setting.
5858 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5859 message, again when deliver_drop_privilege is set or Exim is run as root.
5860 The bug described in (1) was not present in this case, but the tidying up
5861 of the other signals was missing. I have made the two cases consistent.
5863 3. The ignore_target_hosts setting on a manualroute router was being ignored
5864 for hosts that were looked up using the /MX notation.
5866 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5869 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5870 operated on the sender address. After changing the $sender_address to <>
5871 for the sender address verify, Exim was re-instated it as the original
5872 (before rewriting) address, but remembering that it had rewritten it, so it
5873 wasn't rewriting it again. This bug also had the effect of breaking the
5874 sender address verification caching when the sender address was rewritten.
5876 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5877 This has been changed so that if the ip literal address matches
5878 ignore_target_hosts, the router declines.
5880 7. Added expansion conditions match_domain, match_address, and match_local_
5881 part (NOT match_host).
5883 8. The placeholder for the Received: header didn't have a length field set.
5885 9. Added code to Exim itself and to exim_lock to test for a specific race
5886 condition that could lead to file corruption when using MBX delivery. The
5887 issue is with the lockfile that is created in /tmp. If this file is removed
5888 after a process has opened it but before that process has acquired a lock,
5889 there is the potential for a second process to recreate the file and also
5890 acquire a lock. This could lead to two Exim processes writing to the file
5891 at the same time. The added code performs the same test as UW imapd; it
5892 checks after acquiring the lock that its file descriptor still refers to
5893 the same named file.
5895 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5896 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5899 11. Added the smtp_active_hostname option. If used, this will typically be made
5900 to depend on the incoming interface address. Because $interface_address is
5901 not set up until the daemon has forked a reception process, error responses
5902 that can happen earlier (such as "too many connections") no longer contain
5905 12. If an expansion in a condition on a "warn" statement fails because a lookup
5906 defers, the "warn" statement is abandoned, and the next ACL statement is
5907 processed. Previously this caused the whole ACL to be aborted.
5909 13. Added the iplsearch lookup type.
5911 14. Added ident_timeout as a log selector.
5913 15. Added tls_certificate_verified as a log selector.
5915 16. Added a global option tls_require_ciphers (compare the smtp transport
5916 option of the same name). This controls incoming TLS connections.
5918 17. I finally figured out how to make tls_require_ciphers do a similar thing
5919 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5920 before starting the TLS session.
5922 18. Tabs are now shown as \t in -bP output.
5924 19. If the log selector return_path_on_delivery was set, Exim crashed when
5925 bouncing a message because it had too many Received: header lines.
5927 20. If two routers both had headers_remove settings, and the first one included
5928 a superfluous trailing colon, the final name in the first list and the
5929 first name in the second list were incorrectly joined into one item (with a
5930 colon in the middle).
5936 1. Added -C and -D options to the exinext utility, mainly to make it easier
5937 to include in the automated testing, but these could be helpful when
5938 multiple configurations are in use.
5940 2. The exinext utility was not formatting the output nicely when there was
5941 an alternate port involved in the retry record key, nor when there was a
5942 message id as well (for retries that were specific to a specific message
5943 and a specific host). It was also confused by IPv6 addresses, because of
5944 the additional colons they contain. I have fixed the IPv4 problem, and
5945 patched it up to do a reasonable job for IPv6.
5947 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5948 delivery, the log line now contains "pipelined" if PIPELINING was used.
5950 4. An SMTP transport process used to panic and die if the bind() call to set
5951 an explicit outgoing interface failed. This has been changed; it is now
5952 treated in the same way as a connect() failure.
5954 5. A reference to $sender_host_name in the part of a conditional expansion
5955 that was being skipped was still causing a DNS lookup. This no longer
5958 6. The def: expansion condition was not recognizing references to header lines
5959 that used bh_ and bheader_.
5961 7. Added the _cache feature to named lists.
5963 8. The code for checking quota_filecount in the appendfile transport was
5964 allowing one more file than it should have been.
5966 9. For compatibility with Sendmail, the command line option
5974 and sets the incoming protocol and host name (for trusted callers). The
5975 host name and its colon can be omitted when only the protocol is to be set.
5976 Note the Exim already has two private options, -pd and -ps, that refer to
5977 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5978 "s", but I don't think that's a major issue.
5980 10. A number of refactoring changes to the code, none of which should affect
5983 (a) The number of logging options was getting close to filling up the
5984 32-bit word that was used as a bit map. I have split them into two classes:
5985 those that are passed in the argument to log_write(), and those that are
5986 only ever tested independently outside of that function. These are now in
5987 separate 32-bit words, so there is plenty of room for expansion again.
5988 There is no change in the user interface or the logging behaviour.
5990 (b) When building, for example, log lines, the code previously used a
5991 macro that called string_cat() twice, in order to add two strings. This is
5992 not really sufficiently general. Furthermore, there was one instance where
5993 it was actually wrong because one of the argument was used twice, and in
5994 one call a function was used. (As it happened, calling the function twice
5995 did not affect the overall behaviour.) The macro has been replaced by a
5996 function that can join an arbitrary number of extra strings onto a growing
5999 (c) The code for expansion conditions now uses a table and a binary chop
6000 instead of a serial search (which was left over from when there were very
6001 few conditions). Also, it now recognizes conditions like "pam" even when
6002 the relevant support is not compiled in: a suitably worded error message is
6003 given if an attempt is made to use such a condition.
6005 11. Added ${time_interval:xxxxx}.
6007 12. A bug was causing one of the ddress fields not to be passed back correctly
6008 from remote delivery subprocesses. The field in question was not being
6009 subsequently used, so this caused to problems in practice.
6011 13. Added new log selectors queue_time and deliver_time.
6013 14. Might have fixed a bug in maildirsizefile handling that threw up
6014 "unexpected character" debug warnings, and recalculated the data
6015 unnecessarily. In any case, I expanded the warning message to give more
6018 15. Added the message "Restricted characters in address" to the statements in
6019 the default ACL that block characters like @ and % in local parts.
6021 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6022 Three changes have been made:
6024 (a) There was a serious bug; a negative response to MAIL caused the whole
6025 recipient domain to be cached as invalid, thereby blocking all messages
6026 to all local parts at the same domain, from all senders. This bug has
6027 been fixed. The domain is no longer cached after a negative response to
6028 MAIL if the sender used is not empty.
6030 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6033 (c) A new callout option, "use_sender" has been added for people who want
6034 the modified behaviour.
6040 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6043 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6044 indeed breaks things for older releases.
6046 3. Added additional logging to the case where there is a problem reading data
6047 from a filter that is running in a subprocess using a pipe, in order to
6048 try to track down a specific problem.
6050 4. Testing facility fudge: when running in the test harness and attempting
6051 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6052 getting "No route to host". Convert this to a timeout.
6054 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6057 6. Some OS don't have socklen_t but use size_t instead. This affects the
6058 fifth argument of getsockopt() amongst other things. This is now
6059 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6060 can be set for individual OS. I have set it for SunOS5, OSF1, and
6061 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6062 some earlier ones do not.
6064 7. Change 4.30/15 was not doing the test caselessly.
6066 8. The standard form for an IPv6 address literal was being rejected by address
6067 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6068 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6069 this, as well as the form without the "IPv6" on the front (but only when
6070 address literals are enabled, of course).
6072 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6074 10. Exim crashed if a message with an empty sender address specified by -f
6075 encountered a router with an errors_to setting. This could be provoked only
6076 by a command such as
6080 where an empty string was supplied; "<>" did not hit this bug.
6082 11. Installed PCRE release 4.5.
6084 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6085 remained set. It is now erased.
6087 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6088 times from message ids (which are base 36 rather than the normal 62).
6090 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6091 were being counted as actual protocol errors, and logged if the log
6092 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6093 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6094 and DATA following a set of rejected RCPTs do not count as protocol errors.
6095 In other words, Exim assumes they were pipelined, though this may not
6096 actually be the case. Of course, in all cases the client gets an
6097 appropriate error code.
6099 15. If a lookup fails in an ACL condition, a message about the failure may
6100 be available; it is used if testing the ACL cannot continue, because most
6101 such messages specify what the cause of the deferral is. However, some
6102 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6103 that caused an old message to be retained and used if a later statement
6104 caused a defer, replacing the real cause of the deferral.
6106 16. If an IP address had so many PTR records that the DNS lookup buffer
6107 was not large enough to hold them, Exim could crash while trying to process
6108 the truncated data. It now detects and logs this case.
6110 17. Further to 4.21/58, another change has been made: if (and only if) the
6111 first line of a message (the first header line) ends with CRLF, a bare LF
6112 in a subsequent header line has a space inserted after it, so as not to
6113 terminate the header.
6115 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6116 unnecessarily, used atoi() instead of strtol(), and didn't check the
6117 termination when getting file sizes from file names by regex.
6119 19. Completely re-implemented the support for maildirsize files, in the light
6120 of a number of problems with the previous contributed implementation
6121 (4.30/29). In particular:
6123 . If the quota is zero, the maildirsize file is maintained, but no quota is
6126 . If the maildir directory does not exist, it is created before any attempt
6127 to write a maildirsize file.
6129 . The quota value in the file is just a cache; if the quota is changed in
6130 the transport, the new value overrides.
6132 . A regular expression is available for excluding directories from the
6135 20. The autoreply transport checks the characters in options that define the
6136 message's headers; it allows continued headers, but it was checking with
6137 isspace() after an embedded newline instead of explicitly looking for a
6140 21. If all the "regular" hosts to which an address was routed had passed their
6141 expiry times, and had not reached their retry times, the address was
6142 bounced, even if fallback hosts were defined. Now Exim should go on to try
6145 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6146 equivalent code in the SMTP transport. Some hosts send humungous responses
6147 to HELO/EHLO, more than 1024 it seems.
6149 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6150 gives compiler warnings in some environments. I've now done it "properly",
6153 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6154 (because of problems with the built-in one) was declared to return uschar *
6155 instead of char *, causing compiler failure.
6157 25. Fixed a file descriptor leak when processing alias/forward files.
6159 26. Fixed a minor format string issue in dbfn.c.
6161 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6163 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6164 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6167 29. When a sender address is verified, it is cached, to save repeating the test
6168 when there is more than one recipient in a message. However, when the
6169 verification involves a callout, it is possible for different callout
6170 options to be set for different recipients. It is too complicated to keep
6171 track of this in the cache, so now Exim always runs a verification when a
6172 callout is required, relying on the callout cache for the optimization.
6173 The overhead is duplication of the address routing, but this should not be
6176 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6177 to be verified with callout=postmaster, and the main callout worked but the
6178 postmaster check failed, the verification correctly failed. However, if a
6179 subsequent RCPT command asked for sender verification *without* the
6180 postmaster check, incorrect caching caused this verification also to fail,
6183 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6184 it was not caching the DNS options (qualify_single, search_parents) that
6185 were used when the lookup failed. A subsequent lookup with different
6186 options therefore always gave the same answer, though there were cases
6187 where it should not have. (Example: a "domains = !$mx_any" option on a
6188 dnslookup router: the "domains" option is always processed without any
6189 widening, but the router might have qualify_single set.) Now Exim uses the
6190 cached value only when the same options are set.
6192 32. Added John Jetmore's "exipick" utility to the distribution.
6194 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6195 than a timeout (e.g. a certificate is required, and is not provided), an
6196 Exim server now closes the connection immediately. Previously it waited for
6197 the client to close - but if the client is SSL, it seems that they each
6198 wait for each other, leading to a delay before one of them times out.
6200 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6201 maintained 0.8.x compatibility because I don't think many are using it, and
6202 it is clearly obsolete.
6204 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6207 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6208 client certificate was expired. A simple patch fixes this, though I don't
6209 understand the full logic of why the verify callback is called multiple
6212 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6213 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6214 which causes problems with some clients (such as the Certicom SSL Plus
6215 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6216 disables the coutermeasure allowing Eudora to connect."
6218 38. Exim was not checking that a write() to a log file succeeded. This could
6219 lead to Bad Things if a log got too big, in particular if it hit a file
6220 size limit. Exim now panics and dies if it cannot write to a log file, just
6221 as it does if it cannot open a log file.
6223 39. Modified OS/Makefile-Linux so that it now contains
6225 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6227 The two -D definitions ensure that Exim is compiled with large file
6228 support, which makes it possible to handle log files that are bigger than
6231 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6232 instance) a domain was checked against a named list that involved a lookup,
6233 causing $domain_data to be set, then another domain was checked against the
6234 same list, then the first domain was re-checked, the value of $domain_data
6235 after the final check could be wrong. In particular, if the second check
6236 failed, it could be set empty. This bug probably also applied to
6239 41. The strip_trailing_dot option was not being applied to the address given
6240 with the -f command-line option.
6242 42. The code for reading a message's header from the spool was incrementing
6243 $received_count, but never initializing it. This meant that the value was
6244 incorrect (doubled) while delivering a message in the same process in which
6245 it was received. In the most common configuration of Exim, this never
6246 happens - a fresh exec is done - but it can happen when
6247 deliver_drop_privilege is set.
6249 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6250 it now includes up to 150 characters of the unexpected data in the log
6253 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6254 and building data strings. The size of both of these buffers was 10 000
6255 bytes - far larger than anybody would *ever* want, thought I. Needless to
6256 say, somebody hit the limit. I have increased the maximum line length to
6257 20 000 and the maximum data length of concatenated lines to 100 000. I have
6258 also fixed two bugs, because there was no checking on these buffers. Tsk,
6259 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6260 buffer is too small.
6262 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6263 lsearch lookups. Now it does.
6265 46. When parsing a route_list item in a manualroute router, a fixed-length
6266 buffer was used for the list of hosts. I made this 1024 bytes long,
6267 thinking that nobody would ever have a list of hosts that long. Wrong.
6268 Somebody had a whole pile of complicated expansion conditions, and the
6269 string was silently truncated, leading to an expansion error. It turns out
6270 that it is easier to change to an unlimited length (owing to other changes
6271 that have happened since this code was originally written) than to build
6272 structure for giving a limitation error. The length of the item that
6273 expands into the list of hosts is now unlimited.
6275 47. The lsearch lookup could not handle data where the length of text line was
6276 more than 4095 characters. Such lines were truncated, leading to shortened
6277 data being returned. It should now handle lines of any length.
6279 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6280 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6283 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6284 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6285 no longer happens in comment lines. A list of replacements is now placed
6286 at the head of all of the source files, except those whose only change is
6287 to replace PERL_COMMAND in the very first #! line.
6289 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6290 messages on the queue, with a bottom-up merge sort, using code contributed
6291 by Michael Haardt. This should make operations like -bp somewhat faster on
6292 large queues. It won't affect queue runners, except when queue_run_in_order
6295 51. Installed eximstats 1.31 in the distribution.
6297 52. Added support for SRV lookups to the dnslookup router.
6299 53. If an ACL referred to $message_body or $message_body_end, the value was not
6300 reset for any messages that followed in the same SMTP session.
6302 54. The store-handling optimization for building very long strings was not
6303 differentiating between the different store pools. I don't think this
6304 actually made any difference in practice, but I've tidied it.
6306 55. While running the routers to verify a sender address, $sender_address
6307 was still set to the sender address. This is wrong, because when routing to
6308 send a bounce to the sender, it would be empty. Therefore, I have changed
6309 it so that, while verifying a sender address, $sender_address is set to <>.
6310 (There is no change to what happens when verifying a recipient address.)
6312 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6313 target A or AAAA records (if not already returned) without resetting the
6314 qualify_single or search_parents options of the DNS resolver. These are
6315 inappropriate in this case because the targets of MX and SRV records must
6316 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6317 target that, when qualified, matched something in the local domain. These
6318 two options are now turned off when doing these lookups.
6320 57. It seems that at least some releases of Reiserfs (which does not have the
6321 concept of a fixed number of inodes) returns zero and not -1 for the
6322 number of available inodes. This interacted badly with check_spool_inodes,
6323 which assumed that -1 was the "no such thing" setting. What I have done is
6324 to check that the total number of inodes is greater than zero before doing
6325 the test of how many are available.
6327 58. When a "warn" ACL statement has a log_message modifier, the message is
6328 remembered, and not repeated. This is to avoid a lot of repetition when a
6329 message has many recipients that cause the same warning to be written.
6330 However, Exim was preserving the list of already written lines for an
6331 entire SMTP session, which doesn't seem right. The memory is now reset if a
6332 new message is started.
6334 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6335 debugging output unless log_rewrite was also set.
6337 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6338 of (int)(handle) when we know that handle contains (void *)(-1).
6340 61. The Exim daemon panic-logs an error return when it closes the incoming
6341 connection. However "connection reset by peer" seems to be common, and
6342 isn't really an error worthy of noting specially, so that particular error
6345 62. When Exim is trying to find all the local interfaces, it used to panic and
6346 die if the ioctl to get the interface flags failed. However, it seems that
6347 on at least one OS (Solaris 9) it is possible to have an interface that is
6348 included in the list of interfaces, but for which you get a failure error
6349 for this call. This happens when the interface is not "plumbed" into a
6350 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6351 failure of the "get flags" call assumes that the interface is down.
6353 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6354 makes life easier for people who are doing arithmetic on fields extracted
6355 from dates, where you often get leading zeros that should not be
6356 interpreted as octal.
6358 64. Added qualify_domain to the redirect router, to override the global
6361 65. If a pathologically long header line contained very many addresses (the
6362 report of this problem mentioned 10 000) and each of them was rewritten,
6363 Exim could use up a very large amount of memory. (It kept on making new
6364 copies of the header line as it rewrote, and never released the old ones.)
6365 At the expense of a bit more processing, the header rewriting function has
6366 been changed so that it no longer eats memory in this way.
6368 66. The generation of the Received: header has been moved from the time that a
6369 message starts to be received, to the time that it finishes. The timestamp
6370 in the Received: header should now be very close to that of the <= log
6371 line. There are two side-effects of this change:
6373 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6374 logged header lines no longer include the local Received: line, because
6375 it has not yet been created. The same applies to a copy of the message
6376 that is returned to a non-SMTP sender when a message is rejected.
6378 (b) When a filter file is tested using -bf, no additional Received: header
6379 is added to the test message. After some thought, I decided that this
6382 This change does not affect the value of $received_for. It is still set
6383 after address rewriting, but before local_scan() is called.
6385 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6387 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6388 gave an unhelpful panic error message, and a defer error. I have managed to
6389 change this behaviour so that it now rejects any supplied certificate,
6390 which seems right, as the list of acceptable certificates is empty.
6392 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6393 gave an unhelpful defer error. I have not managed to make this reject any
6394 supplied certificates, but the error message it gives is "no certificate
6395 supplied", which is not helpful.
6397 70. exigrep's output now also includes lines that are not associated with any
6398 message, but which match the given pattern. Implemented by a patch from
6399 Martin Sluka, which also tidied up the Perl a bit.
6401 71. Recipient callout verification, like sender verification, was using <> in
6402 the MAIL FROM command. This isn't really the right thing, since the actual
6403 sender may affect whether the remote host accepts the recipient or not. I
6404 have changed it to use the actual sender in the callout; this means that
6405 the cache record is now keyed on a recipient/sender pair, not just the
6406 recipient address. There doesn't seem to be a real danger of callout loops,
6407 since a callout by the remote host to check the sender would use <>.
6408 [SEE ABOVE: changed after hitting problems.]
6410 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6411 temporary errors. However, in the case of such a code being given after
6412 the end of a data transmission (i.e. after ".") Exim was failing to write
6413 a retry record for the message. (Yes, there was some broken host that was
6414 actually sending 8xx at this point.)
6416 73. An unknown lookup type in a host list could cause Exim to panic-die when
6417 the list was checked. (An example that provoked this was putting <; in the
6418 middle of a list instead of at the start.) If this happened during a DATA
6419 ACL check, a -D file could be left lying around. This kind of configuration
6420 error no longer causes Exim to die; instead it causes a defer error. The
6421 incident is still logged to the main and panic logs.
6423 74. Buglet left over from Exim 3 conversion. The message "too many messages
6424 in one connection" was written to the rejectlog but not the mainlog, except
6425 when address rewriting (yes!) was being logged.
6427 75. Added write_rejectlog option.
6429 76. When a system filter was run not as root (that is, when system_filter_user
6430 was set), the values of the $n variables were not being returned to the
6431 main process; thus, they were not subsequently available in the $sn
6434 77. Added +return_path_on_delivery log selector.
6436 78. A connection timeout was being treated differently from recipients deferred
6437 when testing hosts_max_try with a message that was older than the host's
6438 retry timeout. (The host should not be counted, thus allowing all hosts to
6439 be tried at least once before bouncing.) This may have been the cause of an
6440 occasionally reported bug whereby a message would remain on the queue
6441 longer than the retry timeout, but would be bounced if a delivery was
6442 forced. I say "may" because I never totally pinned down the problem;
6443 setting up timeout/retry tests is difficult. See also the next item.
6445 79. The ultimate address timeout was not being applied to errors that involved
6446 a combination of host plus message (for example, a timeout on a MAIL
6447 command). When an address resolved to a number of possible hosts, and they
6448 were not all tried for each delivery (e.g. because of hosts_max_try), a
6449 message could remain on the queue longer than the retry timeout.
6451 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6454 81. Fixed an obscure SMTP outgoing bug which required at least the following
6455 conditions: (a) there was another message waiting for the same server;
6456 (b) the server returned 5xx to all RCPT commands in the first message so
6457 that the message was not completed; (c) the server dropped the connection
6458 or gave a negative response to the RSET that Exim sends to abort the
6459 transaction. The observed case was a dropped connection after DATA that had
6460 been sent in pipelining mode. That is, the server had advertised PIPELINING
6461 but was not implementing it correctly. The effect of the bug was incorrect
6462 behaviour, such as trying another host, and this could lead to a crash.
6468 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6469 and daemon.c were passed as pointers to ints; they should have been
6470 pointers to socklen_t variables (which are typically unsigned ints).
6472 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6475 3. Fixed a really odd bug that affected only the testing scheme; patching a
6476 certain fixed string in the binary changed the value of another string that
6477 happened to be identical to the end of the original first string.
6479 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6480 name", it returns that address as the IP address. On some operating
6481 systems (e.g. Solaris), it also passes back the IP address string as the
6482 "host name". However, on others (e.g. Linux), it passes back an empty
6483 string. Exim wasn't checking for this, and was changing the host name to an
6484 empty string, assuming it had been canonicalized.
6486 5. Although rare, it is permitted to have more than one PTR record for a given
6487 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6488 all the names associated with an address, because they do in Solaris.
6489 However, it seems that they do not in Linux for data that comes from the
6490 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6491 I found this out when I moved to a new Linux workstation and tried to run
6492 the Exim test suite.
6494 To get round this problem I have changed the code so that it now does its
6495 own call to the DNS to look up PTR records when searching for a host name.
6496 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6497 addresses that are only in /etc/hosts are still found.
6499 This behaviour is, however, controlled by an option called host_lookup_
6500 order, which defaults to "bydns:byaddr". If people want to use the other
6501 order, or indeed, just use one or the other means of lookup, they can
6502 specify it in this variable.
6504 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6505 some operating systems, this comes back from gethostbyaddr() as an empty
6506 string, and this is what Exim used to test for. However, it seems that in
6507 other systems, "." is yielded. Exim now tests for this case too.
6509 7. The values of check_spool_space and check_log_space are now held internally
6510 as a number of kilobytes instead of an absolute number of bytes. If a
6511 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6512 kilobyte. This means that much larger values can be stored.
6514 8. Exim monitor: an attempt to get the action menu when not actually pointing
6515 at a message produces an empty menu entitled "No message selected". This
6516 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6517 no entries in it ("Shell widget menu has zero width and/or height"). So I
6518 have added a single, blank menu entry in this case.
6520 9. Added ${quote_local_part.
6522 10. MIME decoding is now applied to the contents of Subject: header lines when
6525 11. Now that a reference to $sender_host_address automatically causes a reverse
6526 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6527 host lookup before query-style lookups in lists that might use this
6528 variable. This has therefore been abolished, and the "net-" prefix is no
6529 longer necessary for query-style lookups.
6531 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6532 have been a typo for LFLAGS, so it has been changed.
6534 13. The install script calls Exim with "-C /dev/null" in order to find the
6535 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6536 to be output. However, since Exim outputs its version number before the
6537 error, it didn't break the script. It just looked ugly. I fixed this by
6538 always allowing "-C /dev/null" if the caller is root.
6540 14. Ignore overlarge ACL variable number when reading spool file - insurance
6541 against a later release with more variables having written the file.
6543 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6544 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6545 this, as well as the form without the "IPv6" on the front.
6547 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6548 OS/Makefile-Darwin file.
6550 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6551 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6553 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6554 variable. However, some OS use ints for inodes. I've added cast to long int
6555 to get rid of the compiler warning.
6557 19. I had forgotten to lock out "/../" in configuration file names when
6558 ALT_CONFIG_PREFIX was set.
6560 20. Routers used for verification do not need to specify transports. However,
6561 if such a router generated a host list, and callout was configured, Exim
6562 crashed, because it could not find a port number from the (non-existent)
6563 transport. It now assumes port 25 in this circumstance.
6565 21. Added the -t option to exigrep.
6567 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6568 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6569 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6570 them is set, LOOKUP_LSEARCH is forced.
6572 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6574 24. Added sender and host information to the "rejected by local_scan()" log
6575 line; previously there was no indication of these.
6577 25. Added .include_if_exists.
6579 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6580 Linux. It turns out that not all file systems support this. Apparently some
6581 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6582 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6583 not supported on the file descriptor, is now ignored when Exim is trying to
6584 sync a directory. This applies only to Linux.
6586 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6588 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6589 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6592 29. Added support for maildirsize files from supplied patch (modified a bit).
6594 30. The use of :fail: followed by an empty string could lead Exim to respond to
6595 sender verification failures with (e.g.):
6597 550 Verification failed for <xxx>
6598 550 Sender verify failed
6600 where the first response line was missing the '-' that indicates it is not
6601 the final line of the response.
6603 31. The loop for finding the name of the user that called Exim had a hardwired
6604 limit of 10; it now uses the value of finduser_retries, which is used for
6605 all other user lookups.
6607 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6610 33. Exim was neglecting to zero errno before one call of strtol() when
6611 expanding a string and expecting an integer value. On some systems this
6612 resulted in spurious "integer overflow" errors. Also, it was casting the
6613 result into an int without checking.
6615 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6616 did not work. The code looks as if it has *never* worked, though it appears
6617 to have been documented since at least release 1.62. I have made it work.
6619 35. The "timeout_DNS" error in retry rules, also documented since at least
6620 1.62, also never worked. As it isn't clear exactly what this means, and
6621 clearly it isn't a major issue, I have abolished the feature by treating it
6622 as "timeout", and writing a warning to the main and panic logs.
6624 36. The display of retry rules for -brt wasn't always showing the error code
6627 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6628 timeout_connect_A, timeout_connect_MX.
6630 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6631 to the empty sender.
6633 39. The daemon was not analysing the content of -oX till after it had closed
6634 stderr and disconnected from the controlling terminal. This meant that any
6635 syntax errors were only noted on the panic log, and the return code from
6636 the command was 0. By re-arranging the code a little, I've made the
6637 decoding happen first, so such errors now appear on stderr, and the return
6638 code is 1. However, the actual setting up of the sockets still happens in
6639 the disconnected process, so errors there are still only recorded on the
6642 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6643 connections (as happens on some IP stacks) was logged at start up time as
6644 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6645 it from "IPv6 and IPv4", which means that two separate sockets are being
6648 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6649 says whether AF_INET or AF_INET6 was passed as an argument.
6651 42. Exiwhat output was messed up when time zones were included in log
6654 43. Exiwhat now gives more information about the daemon's listening ports,
6655 and whether -tls-on-connect was used.
6657 44. The "port" option of the smtp transport is now expanded.
6659 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6660 silently ignored. Now an error message is written to the main and panic
6663 46. There's a new ACL modifier called "logwrite" which writes to a log file
6664 as soon as it is encountered.
6666 47. Added $local_user_uid and $local_user_gid at routing time.
6668 48. Exim crashed when trying to verify a sender address that was being
6671 49. Exim was recognizing only a space character after ".include". It now also
6672 recognizes a tab character.
6674 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6675 extracting the relevant information from the specification. The man page no
6676 longer contains scrambled data for the -d option, and I've added a section
6677 at the front about calling Exim under different names.
6679 51. Added "extra_headers" argument to the "mail" command in filter files.
6681 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6684 53. Installed eximstats 1.29.
6686 54. Added transport_filter_timeout as a generic transport option.
6688 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6689 Cc: header lines. This was required by RFC 822, but it not required by RFC
6692 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6693 incoming messages that did not have them. Now it does so only if the
6694 message originates locally, that is, if there is no associated remote host
6695 address. When Resent- header lines are present, this applies to the Resent-
6696 lines rather than the non-Resent- lines.
6698 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6699 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6701 58. Messages for configuration errors now include the name of the main
6702 configuration file - useful now that there may be more than one file in a
6703 list (.included file names were always shown).
6705 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6706 for those rare installations that do not start the daemon as root or run it
6707 setuid root. I've cut out the call to initgroups() if the daemon is not
6710 60. The Exim user and group can now be bound into the binary as text strings
6711 that are looked up at the start of Exim's processing.
6713 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6715 62. Added $mailstore_basename variable.
6717 63. Installed patch to sieve.c from Michael Haardt.
6719 64. When Exim failed to open the panic log after failing to open the main log,
6720 the original message it was trying to log was written to stderr and debug
6721 output, but if they were not available (the usual case in production), it
6722 was lost. Now it is written to syslog before the two lines that record the
6723 failures to open the logs.
6725 65. Users' Exim filters run in subprocesses under the user's uid. It is
6726 possible for a "deliver" command or an alias in a "personal" command to
6727 provoke an address rewrite. If logging of address rewriting is configured,
6728 this fails because the process is not running as root or exim. There may be
6729 a better way of dealing with this, but for the moment (because 4.30 needs
6730 to be released), I have disabled address rewrite logging when running a
6731 filter in a non-root, non-exim process.
6737 1. The buildconfig auxiliary program wasn't quoting the value set for
6738 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6739 not defined. This bug was masked in 4.22 by the effect that was fixed in
6742 2. Some messages that were rejected after a message id was allocated were
6743 shown as "incomplete" by exigrep. It no longer does this for messages that
6744 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6746 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6747 have allow_domain_literals set, the ID did not get logged in the <= line.
6748 Domain literals are now always recognized in Message-ID: header lines.
6750 4. The first argument for a ${extract expansion item is the key name or field
6751 number. Leading and trailing spaces in this item were not being ignored,
6752 causing some misleading effects.
6754 5. When deliver_drop_privilege was set, single queue runner processes started
6755 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6756 same command in the process it spins off) were not dropping privilege.
6758 6. When the daemon running as "exim" started a queue runner, it always
6759 re-executed Exim in the spun-off process. This is a waste of effort when
6760 deliver_drop_privilege is set. The new process now just calls the
6761 queue-runner function directly.
6767 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6770 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6771 ignored. Though the use of -oP was forcing the writing of a pid file, it
6772 was always written to the default place.
6774 3. If the message "no IP address found for host xxxx" is generated during
6775 incoming verification, it is now followed by identification of the incoming
6776 connection (so you can more easily find what provoked it).
6778 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6780 5. Added some features to "harden" Exim a bit more against certain attacks:
6782 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6783 be put in Local/Makefile. This is like the never_users runtime option,
6784 but it cannot be overridden. The default setting is "root".
6786 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6787 prefix string with which any file named in a -C command line option
6790 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6791 is retained for -C and -D only if the caller of Exim is root. Without
6792 it, the exim user may also use -C and -D and retain privilege.
6794 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6795 command line option is disabled.
6797 6. Macro names set by the -D option must start with an upper case letter, just
6798 like macro names defined in the configuration file.
6800 7. Added "dereference=" facility to LDAP.
6802 8. Two instances of the typo "uknown" in the source files are fixed.
6804 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6805 the Configure-Makefile script screwed up while processing it.
6807 10. Incorporated PCRE 4.4.
6809 11. The SMTP synchronization check was not operating right at the start of an
6810 SMTP session. For example, it could not catch a HELO sent before the client
6811 waited for the greeting. There is now a check for outstanding input at the
6812 point when the greeting is written. Because of the duplex, asynchronous
6813 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6814 way, but not yet received, when the check is performed.
6816 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6817 on TCP/IP sockets, because this apparently causes some broken clients to
6820 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6821 unchanged) from the Cygwin maintainer.
6823 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6824 was supported instead of testing for mbx. Effectively a typo.
6826 15. The spa authenticator server code was not checking that the input it
6827 received was valid base64.
6829 16. The debug output line for the "set" modifier in ACLs was not showing the
6830 name of the variable that was being set.
6832 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6834 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6835 lookup on its own. Something else was needed to trigger the lookup. For
6836 example, a match in host_lookup or the need for a host name in a host list.
6837 Now, if $sender_host_name is referenced and the host name has not yet been
6838 looked up, a lookup is performed. If the lookup fails, the variable remains
6839 empty, and $host_lookup_failed is set to "1".
6841 19. Added "eqi" as a case-independent comparison operator.
6843 20. The saslauthd authentication condition could segfault if neither service
6844 nor realm was specified.
6846 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6847 error message that was logged was misleading, and incoming SMTP
6848 connections were dropped. The message is now more accurate, and temporary
6849 errors are given to SMTP connections.
6851 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6852 (except RSET) with a 421 error, until QUIT is received. However, it was
6853 failing to send a response to QUIT.
6855 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6856 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6857 ACL is now run after the helo_try_verify_hosts code.
6859 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6860 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6861 case-independent, so other case variants are also recognized). Apparently
6862 some systems use these upper case variants.
6864 25. If more than two messages were waiting for the same host, and a transport
6865 filter was specified for the transport, Exim sent two messages over the
6866 same TCP/IP connection, and then failed with "socket operation on non-
6867 socket" when it tried to send the third.
6869 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6871 27. The extern definition of crypt16() in expand.c was not being excluded when
6872 the OS had its own crypt16() function.
6874 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6875 as a preferred synonym for return_size_limit, both as an option and as an
6878 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6880 30. Changed the default configuration ACL to relax the local part checking rule
6881 for addresses that are not in any local domains. For these addresses,
6882 slashes and pipe symbols are allowed within local parts, but the sequence
6883 /../ is explicitly forbidden.
6885 31. SPA server authentication was not clearing the challenge buffer before
6888 32. log_message in a "warn" ACL statement was writing to the reject log as
6889 well as to the main log, which contradicts the documentation and doesn't
6890 seem right (because no rejection is happening). So I have stopped it.
6892 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6893 However, I am unable to do any testing of this.
6895 34. Fixed an infelicity in the appendfile transport. When checking directories
6896 for a mailbox, to see if any needed to be created, it was accidentally
6897 using path names with one or more superfluous leading slashes; tracing
6898 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6900 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6901 contents are added to the log line that is written for every discarded
6902 recipient. (Previously a log_message setting was ignored.)
6904 36. The ${quote: operator now quotes the string if it is empty.
6906 37. The install script runs exim in order to find its version number. If for
6907 some reason other than non-existence or emptiness, which it checks, it
6908 could not run './exim', it was installing it with an empty version number,
6909 i.e. as "exim-". This error state is now caught, and the installation is
6912 38. An argument was missing from the function that creates an error message
6913 when Exim fails to connect to the socket for saslauthd authentication.
6914 This could cause Exim to crash, or give a corrupted message.
6916 39. Added isip, isip4, and isip6 to ${if conditions.
6918 40. The ACL variables $acl_xx are now saved with the message, and can be
6919 accessed later in routers, transports, and filters.
6921 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6922 strings in the file are not string-expanded.
6924 42. If a MAIL command specified a SIZE value that was too large to fit into an
6925 int variable, the check against message_size_limit failed. Such values are
6926 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6927 day this will have to be increased, but I don't think I want to be around
6928 when emails are that large.
6935 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6936 iconv() is not standard in FreeBSD.
6938 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6939 IPv6 enabled. The observed symptom was a segmentation fault on return from
6940 the function os_common_find_running_interfaces() in src/os.c.
6942 3. In the check_special_case() function in daemon.c I had used "errno" as an
6943 argument name, which causes warnings on some systems. This was basically a
6944 typo, since it was named "eno" in the comments!
6946 4. The code that waits for the clock to tick (at a resolution of some fraction
6947 of a second) so as to ensure message-id uniqueness was always waiting for
6948 at least one whole tick, when it could have waited for less. [This is
6949 almost certainly not relevant at current processor speeds, where it is
6950 unlikely to ever wait at all. But we try to future-proof.]
6952 5. The function that sleeps for a time interval that includes fractions of a
6953 second contained a race. It did not block SIGALRM between setting the
6954 timer, and suspending (a couple of lines later). If the interval was short
6955 and the sigsuspend() was delayed until after it had expired, the suspension
6956 never ended. On busy systems this could lead to processes getting stuck for
6959 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6960 process, before it forks any delivery processes. The open lookup caching
6961 mechanism meant that the open file or database connection was passed into
6962 the delivery process. The problem was that delivery processes always tidy
6963 up cached lookup data. This could cause a problem for the next delivery
6964 process started by the queue runner, because the external queue runner
6965 process does not know about the closure. So the next delivery process
6966 still has data in the lookup cache. In the case of a file lookup, there was
6967 no problem because closing a file descriptor in a subprocess doesn't affect
6968 the parent. However, if the lookup was caching a connection to a database,
6969 the connection was closed, and the second delivery process was likely to
6970 see errors such as "PGSQL: query failed: server closed the connection
6971 unexpectedly". The problem has been fixed by closing all cached lookups
6972 in a queue runner before running a delivery process.
6974 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6975 seem to have the "const" qualifier which it has on other OS. I've
6978 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6979 *of the same type* (client or server) with the same public name that an
6980 error should be diagnosed.
6982 9. When Exim looked up a host name for an IP address, but failed to find the
6983 original IP address when looking up the host name (a safety check), it
6984 output the message "<ip address> does not match any IP for NULL", which was
6985 confusing, to say the least. The bug was that the host name should have
6986 appeared instead of "NULL".
6988 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6989 user that is built into the binary, and the -C or -D options is used, root
6990 privilege is dropped before the configuration file is read. In addition,
6991 logging is switched to stderr instead of the normal log files. If the
6992 configuration then re-defines the Exim user, the unprivileged environment
6993 is probably not what is expected, so Exim logs a panic warning message (but
6996 However, if deliver_drop_privilege is set, the unprivileged state may well
6997 be exactly what is intended, so the warning has been cut out in that case,
6998 and Exim is allowed to try to write to its normal log files.
7004 1. smtp_return_error_details was not giving details for temporary sender
7005 or receiver verification errors.
7007 2. Diagnose a configuration error if two authenticators have the same public
7010 3. Exim used not to create the message log file for a message until the first
7011 delivery attempt. This could be confusing when incoming messages were held
7012 for policy or load reasons. The message log file is now created at the time
7013 the message is received, and an initial "Received" line is written to it.
7015 4. The automatically generated man page for command line options had a minor
7016 bug that caused no ill effects; however, a more serious problem was that
7017 the procedure for building the man page automatically didn't always
7018 operate. Consequently, release 4.20 contains an out-of-date version. This
7019 shouldn't happen again.
7021 5. When building Exim with embedded Perl support, the script that builds the
7022 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7023 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7025 6. The freeze_tell option was not being used for messages that were frozen on
7026 arrival, either by an ACL or by local_scan().
7028 7. Added the smtp_incomplete_transaction log selector.
7030 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7031 was accepting AUTH without a new EHLO.
7033 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7034 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7037 10. Logging of TCP/IP connections (when configured) now happens in the main
7038 daemon process instead of the child process, so that the TCP/IP connection
7039 count is more accurate (but it can never be perfect).
7041 11. The use of "drop" in a nested ACL was not being handled correctly in the
7042 outer ACL. Now, if condition failure induced by the nested "drop" causes
7043 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7044 or "require"), the connection is dropped.
7046 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7047 that yield "discard" can now be used with an "accept" or a "discard" verb,
7048 but an error is generated for any others (because I can't see a useful way
7049 to define what should happen).
7051 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7052 are now processed in the same way as lines in the Exim configuration file.
7053 In particular, continuation lines are supported.
7055 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7057 15. Added -ti meaning -t -i.
7059 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7060 domains, and warn by logging if others are found.
7062 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7063 returned from GIFCONF when Exim is trying to find the list of interfaces on
7064 a host. The code in os.c has been modified to copy each ifreq to an aligned
7065 structure in all cases.
7067 Also, in some cases, the returned ifreq's were being copied to a 'struct
7068 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7069 means the last couple of bytes of an IPv6 address could be chopped if the
7070 ifreq contained only a normal sockaddr (14 bytes storage).
7072 18. Named domain lists were not supported in the hosts_treat_as_local option.
7073 An entry such as +xxxx was not recognized, and was treated as a literal
7076 19. Ensure that header lines added by a DATA ACL are included in the reject log
7077 if the ACL subsequently rejects the message.
7079 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7080 MD5 (which is deprecated).
7082 21. When testing a filter file using -bf, Exim was writing a message when it
7083 took the sender from a "From " line in the message, but it was not doing so
7084 when it took $return_path from a Return-Path: header line. It now does.
7086 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7087 with a valid header line field name (a series of printing characters
7088 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7090 23. Changed "disc" in the source to "disk" to conform to the documentation and
7091 the book and for uniformity.
7093 24. Ignore Sendmail's -Ooption=value command line item.
7095 25. When execve() failed while trying to run a command in a pipe transport,
7096 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7097 could be confused with a return value of 69 from the command itself. This
7098 has been changed to 127, the value the shell returns if it is asked to run
7099 a non-existent command. The wording for the related log line suggests a
7100 non-existent command as the problem.
7102 26. If received_header_text expands to an empty string, do not add a Received:
7103 header line to the message. (Well, it adds a token one on the spool, but
7104 marks it "old" so that it doesn't get used or transmitted.)
7106 27. Installed eximstats 1.28 (addition of -nt option).
7108 28. There was no check for failure on the call to getsockname() in the daemon
7109 code. This can fail if there is a shortage of resources on the system, with
7110 ENOMEM, for example. A temporary error is now given on failure.
7112 29. Contrary to the C standard, it seems that in some environments, the
7113 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7114 program. Exim now does this explicitly; it affects the formatting of
7115 timestamps using strftime().
7117 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7118 complaints. I've now initialized all the variables, to avoid this.
7120 32. Header lines added by a system filter were not being "seen" during
7121 transport-time rewrites.
7123 33. The info_callback() function passed to OpenSSL is set up with type void
7124 (*)(SSL *, int, int), as described somewhere. However, when calling the
7125 function (actually a macro) that sets it up, the type void(*)() is
7126 expected. I've put in a cast to prevent warnings from picky compilers.
7128 34. If a DNS black list lookup found a CNAME record, but there were no A
7129 records associated with the domain it pointed at, Exim crashed.
7131 35. If a DNS black list lookup returned more than one A record, Exim ignored
7132 all but the first. It now scans all returned addresses if a particular IP
7133 value is being sought. In this situation, the contents of the
7134 $dnslist_value variable are a list of all the addresses, separated by a
7137 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7138 to accept a host name and all its aliases if the forward lookup for any of
7139 them yielded the IP address of the incoming connection. Now it accepts only
7140 those names whose forward lookup yields the correct IP address. Any other
7141 names are discarded. This closes a loophole whereby a rogue DNS
7142 administrator could create reverse DNS records to break through a
7143 wildcarded host restriction in an ACL.
7145 37. If a user filter or a system filter that ran in a subprocess used any of
7146 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7147 the wrong values were passed to the pipe command ($thisaddress had the
7148 value of $0, $0 had the value of $1, etc). This bug was introduced by
7149 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7151 38. Improved the line breaking for long SMTP error messages from ACLs.
7152 Previously, if there was no break point between 40 and 75 characters, Exim
7153 left the rest of the message alone. Two changes have been made: (a) I've
7154 reduced the minimum length to 35 characters; (b) if it can't find a break
7155 point between 35 and 75 characters, it looks ahead and uses the first one
7156 that it finds. This may give the occasional overlong line, but at least the
7157 remaining text gets split now.
7159 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7160 file descriptors might be low, and that setting 1000 would always raise it.
7161 It turns out that in some environments, the limit is already over 1000 and
7162 that lowering it causes trouble. So now Exim takes care not to decrease it.
7164 40. When delivering a message, the value of $return_path is set to $sender_
7165 address at the start of routing (routers may change the value). By an
7166 oversight, this default was not being set up when an address was tested by
7167 -bt or -bv, which affected the outcome if any router or filter referred to
7170 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7171 log only when "message" or "log_message" are set. However, if one of the
7172 conditions was an address verification, or a call to a nested ACL, the
7173 messages generated by the underlying test were being passed through. This
7174 no longer happens. The underlying message is available in $acl_verify_
7175 message for both "message" and "log_message" expansions, so it can be
7176 passed through if needed.
7178 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7179 new expansion $bh_ to give the encoded byte string without charset
7180 translation. Translation happens only if iconv() is available; HAVE_ICONV
7181 indicates this at build time. HEADERS_CHARSET gives the charset to
7182 translate to; headers_charset can change it in the configuration, and
7183 "headers charset" can change it in an individual filter file.
7185 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7186 that creates RFC 2047 encoded "words" labels them as that charset instead
7187 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7188 expansion operator; (ii) when Exim creates a From: line for a local
7189 message; (iii) when a header line is rewritten to include a "phrase" part.
7191 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7192 buggy, causing it to skip the first lines of messages whose message ID
7193 ended in 'D'. This would not have bitten before Exim release 4.14, because
7194 message IDs were unlikely to end in 'D' before then. The effect was to have
7195 incorrect size information for certain domains.
7197 45. #include "config.h" was missing at the start of the crypt16.c module. This
7198 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7201 46. If there was a timeout during a "random" callout check, Exim treated it as
7202 a failure of the random address, and carried on sending RSET and the real
7203 address. If the delay was just some slowness somewhere, the response to the
7204 original RCPT would be taken as a response to RSET and so on, causing
7205 mayhem of various kinds.
7207 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7208 when I implemented it. It didn't allow for the fact that some option values
7209 may legitimately be negative (e.g. size_addition), and it didn't even do
7210 the right test for positive values.
7212 48. Domain names in DNS records are case-independent. Exim always looks them up
7213 in lower case. Some resolvers return domain names in exactly the case they
7214 appear in the zone file, that is, they may contain uppercase letters. Not
7215 all resolvers do this - some return always lower case. Exim was treating a
7216 change of case by a resolver as a change of domain, similar to a widening
7217 of a domain abbreviation. This triggered its re-routing code and so it was
7218 trying to route what was effectively the same domain again. This normally
7219 caused routing to fail (because the router wouldn't handle the domain
7220 twice). Now Exim checks for this case specially, and just changes the
7221 casing of the domain that it ultimately uses when it transmits the message
7224 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7227 50. If a filter generated a file delivery with a non-absolute name (possible if
7228 no home directory exists for the router), the forbid_file option was not
7231 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7232 the existing equality matching.
7234 52. Exim was using ints instead of ino_t variables in some places where it was
7235 dealing with inode numbers.
7237 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7238 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7239 called TMPDIR, and if it finds it is different, it changes its value.
7241 54. The smtp_printf() function is now made available to local_scan() so
7242 additional output lines can be written before returning. There is also an
7243 smtp_fflush() function to enable the detection of a dropped connection.
7244 The variables smtp_input and smtp_batched_input are exported to
7247 55. Changed the default runtime configuration: the message "Unknown user"
7248 has been removed from the ACL, and instead placed on the localuser router,
7249 using the cannot_route_message feature. This means that any verification
7250 failures that generate their own messages won't get overridden. Similarly,
7251 the "Unrouteable address" message that was in the ACL for unverifiable
7252 relay addresses has also been removed.
7254 56. Added hosts_avoid_esmtp to the smtp transport.
7256 57. The exicyclog script was not checking for the esoteric option
7257 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7258 will work only if exicyclog is run under the appropriate euid.
7260 58. Following a discussion on the list, the rules by which Exim recognises line
7261 endings on incoming messages have been changed. The -dropcr and drop_cr
7262 options are now no-ops, retained only for backwards compatibility. The
7263 following line terminators are recognized: LF CRLF CR. However, special
7264 processing applies to CR:
7266 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7267 nor a local message in the state where . is a terminator.
7269 (ii) If a bare CR is encountered in a header line, an extra space is added
7270 after the line terminator so as not to end the header. The reasoning
7271 behind this is that bare CRs in header lines are most likely either
7272 to be mistakes, or people trying to play silly games.
7274 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7275 was being incorrectly given as 18 bytes larger than it should have been.
7276 This is a VOB (very old bug).
7278 60. This may never have affected anything current, but just in case it has:
7279 When the local host is found other than at the start of a list of hosts,
7280 the local host, those with the same MX, and any that follow, are discarded.
7281 When the list in question was part of a longer list of hosts, the following
7282 hosts (not currently being processed) were also being discarded. This no
7283 longer happens. I'm not sure if this situation could ever has previously
7286 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7289 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7290 header. This is something that is recommended in a new Internet Draft, and
7291 is something that is documented as being done by Sendmail. There are two
7292 possible values. For messages generated by the autoreply transport, Exim
7295 Auto-Submitted: auto-replied
7297 whereas for all other generated messages (e.g. bounces) it adds
7299 Auto-Submitted: auto-generated
7301 63. The "personal" condition in filters now includes a test for the
7302 Auto-Submitted: header. If it contains the string "auto-" the message it
7303 not considered personal.
7305 64. Added rcpt_include_affixes as a generic transport option.
7307 65. Added queue_only_override (default true).
7309 66. Added the syslog_duplication option.
7311 67. If what should have been the first header line of a message consisted of
7312 a space followed by a colon, Exim was mis-interpreting it as a header line.
7313 It isn't of course - it is syntactically invalid and should therefore be
7314 treated as the start of the message body. The misbehaviour could have
7315 caused a number of strange effects, including loss of data in subsequent
7316 header lines, and spool format errors.
7318 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7319 client host had authenticated. This control can now be exercised by an ACL
7320 for more flexibility.
7322 69. By default, callouts do not happen when testing with -bh. There is now a
7323 variant, -bhc, which does actually run the callout code, including
7324 consulting and updating the callout cache.
7326 70. Added support for saslauthd authentication, courtesy of Alexander
7329 71. If statvfs() failed on the spool or log directories while checking their
7330 size for availability, Exim confusingly gave the error "space shortage".
7331 Furthermore, in debugging mode it crashed with a floating point exception.
7332 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7333 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7334 serious problem, Exim now writes to the main and panic logs when this
7335 happens, with details of the failure. It then refuses to accept the
7336 incoming message, giving the message "spool directory problem" or "log
7337 directory problem" with a 421 code for SMTP messages.
7339 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7340 0, 1, and 2 exist, because some OS complain for execs without them (see
7341 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7342 descriptors. However, the code omitted to check that the open succeeded,
7343 causing mysterious errors if for some reason the permissions on /dev/null
7344 got screwed. Now Exim writes a message to the main and panic logs, and
7345 bombs out if it can't open /dev/null.
7347 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7348 interact so that it is all more flexible. It is supposed to remain
7349 backwards compatible. Also added extra_local_interfaces.
7351 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7352 to bomb out with an assertion failure - to the client this appears as a
7353 connection drop. This problem occurs in the part of the code that was taken
7354 from the Samba project. Fortunately, the assertion is in a very simple
7355 function, so I have fixed this by reproducing the function inline in the
7356 one place where it is called, and arranging for authentication to fail
7357 instead of killing the process with assert().
7359 75. The SPA client code was not working when the server requested OEM rather
7360 than Unicode encoding.
7362 76. Added code to make require_files with a specific uid setting more usable in
7363 the case where statting the file as root fails - usually a non-root-mounted
7364 NFS file system. When this happens and the failure is EACCES, Exim now
7365 forks a subprocess and does the per-uid checking as the relevant uid.
7367 77. Added process_log_path.
7369 78. If log_file_path was not explicitly set, a setting of check_log_space or
7370 check_log_inodes was ignored.
7372 79. If a space check for the spool or log partitions fails, the incident is now
7373 logged. Of course, in the latter case the data may get lost...
7375 80. Added the %p formatting code to string_format() so that it can be used to
7376 print addresses in debug_print(). Adjusted all the address printing in the
7377 debugging in store.c to use %p rather than %d.
7379 81. There was a concern that a line of code in smtp_in.c could overflow a
7380 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7381 initially expressed, the concern was not well-founded, because trailing
7382 spaces are removed early. However, if the trailing spaces were followed by
7383 a NULL, they did not get removed, so the overflow was possible. Two fixes
7386 (a) I re-wrote the offending code in a cleaner fashion.
7387 (b) If an incoming SMTP command contains a NULL character, it is rejected
7390 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7391 runs initgroups(), so that if the Exim user is in any additional groups,
7392 they will be used during message reception.
7398 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob