1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917, OVE-20190718-0006)
17 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
18 buffer overrun for (non-chunking) other transports.
20 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
21 TLS1.3, means that a server rejecting a client certificate is not visible
22 to the client until the first read of encrypted data (typically the
23 response to EHLO). Add detection for that case and treat it as a failed
24 TLS connection attempt, so that the normal retry-in-clear can work (if
27 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
28 and/or domain. Found and fixed by Jason Betts.
30 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
31 configuration). If a CNAME target was not a wellformed name pattern, a
38 JH/01 Remove code calling the customisable local_scan function, unless a new
39 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
41 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
42 non-signal-safe functions being used.
44 JH/03 Bug 2269: When presented with a received message having a stupidly large
45 number of DKIM-Signature headers, disable DKIM verification to avoid
46 a resource-consumption attack. The limit is set at twenty.
48 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
49 report of oldest_pass in ${authres } in consequence, and separate out
50 some descriptions of reasons for verification fail.
52 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
53 files in the spool were present and unlocked. A queue-runner could spot
54 them, resulting in a duplicate delivery. Fix that by doing the unlock
55 after the unlink. Investigation by Tim Stewart. Take the opportunity to
56 add more error-checking on spoolfile handling while that code is being
59 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
60 No known attacks, no CVE, this is defensive hardening.
62 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
63 a queue-runner could start a delivery while other operations were ongoing.
64 Cutthrough delivery was a common victim, resulting in duplicate delivery.
65 Found and investigated by Tim Stewart. Fix by using the open message data
66 file handle rather than opening another, and not locally closing it (which
67 releases a lock) for that case, while creating the temporary .eml format
68 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
70 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
71 $sender_verify_failure/$recipient_verify_failure to "random".
73 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
76 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
77 Previously this would segfault.
79 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
82 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
83 like zero, since the resolver should be doing this for us, But we need one
84 as a CNAME but no MX presence gets the CNAME returned; we need to check
85 that doesn't point to an MX to declare it "no MX returned" rather than
86 "error, loop". A new main option is added so the older capability of
87 following some limited number of chain links is maintained.
89 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
91 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
92 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
93 now-deprecated earlier definitions used only specified the range up to TLS
94 1.2 (in the older-version library docs).
96 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
98 JH/15 Rework TLS client-side context management. Stop using a global, and
99 explicitly pass a context around. This enables future use of TLS for
100 connections to service-daemons (eg. malware scanning) while a client smtp
101 connection is using TLS; with cutthrough connections this is quite likely.
103 JH/16 Fix ARC verification to do AS checks in reverse order.
105 JH/17 Support a "tls" option on the ${readsocket } expansion item.
107 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
108 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
109 Previously the "utf8" would be re-prepended for every additional message.
111 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
112 Previously thery were accepted, resulting in issues when attempting to
113 forward messages to a non-supporting MTA.
115 PP/02 Let -n work with printing macros too, not just options.
117 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
118 one parent address was copied, and bogus data was used at delivery-logging
119 time. Either a crash (after delivery) or bogus log data could result.
120 Discovery and analysis by Tim Stewart.
122 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
123 Previously if the string ended mid-character, we did not insert the
124 promised '?' replacement.
126 PP/04 Documentation: current string operators work on bytes, not codepoints.
128 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
129 should pack well giving a smaller memory footprint so better caching and
130 therefore performance. Group the declarations where this can't be done so
131 that the byte-sized flag variables are not interspersed among pointer
132 variables, giving a better chance of good packing by the compiler.
134 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
135 non-null, to avoid issues with sites running BATV. Previously reports were
136 sent with an empty envelope sender so looked like bounces.
138 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
139 The ignore_error flag wasn't being returned from the filter subprocess so
140 was not set for later routers. Investigation and fix by Matthias Kurz.
142 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
143 and a msg:complete for the whole, when a message is manually removed using
144 -Mrm. Developement by Matthias Kurz, hacked on by JH.
146 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
147 a "Gnu special" function, asprintf() in the DB utility binary builds; I
148 hope that is portable enough.
150 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
151 requiring a known-CA anchor certificate; make it now rely entirely on the
152 TLSA as an anchor. Checking the name on the leaf cert against the name
153 on the A-record for the host is still done for TA (but not for EE mode).
155 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
156 included in delivery lines for non-proxied connections, when compiled with
157 SUPPORT_SOCKS and running with proxy logging enabled.
159 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
160 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
161 move the existing event to fire before the normal logging of message
162 failure so that custom logging is bracketed by normal logging.
164 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
165 msg:fail:internal event. Developement by Matthias Kurz.
167 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
168 far too small for todays use of crypto signatures stored there. Go all
169 the way to the max DNS message size of 64kB, even though this might be
170 overmuch for IOT constrained device use.
172 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
173 copy a string over itself. The library routine is documented as not
174 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
176 JH/32 For main options check_spool_space and check_inode_space, where the
177 platform supports 64b integers, support more than the previous 2^31 kB
178 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
179 the previous G, M, k.
181 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
182 $authenticated_fail_id variable on authentication failure. Previously
185 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
186 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
187 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
188 GNUTLS_SEC_PARAM_MEDIUM.
190 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
191 side. Previously we would continue as if no SNI had been received.
193 JH/36 Harden the handling of string-lists. When a list consisted of a sole
194 "<" character, which should be a list-separator specification, we walked
195 off past the nul-terimation.
197 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
198 causes) even when the retry time is not yet met. Previously they were
199 not, meaning that when (say) an account was over-quota and temp-rejecting,
200 and multiple senders' messages were queued, only one sender would get
201 notified on each configured delay_warning cycle.
203 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
205 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
206 cipher-suites, an error can be left on the stack even for a succeeding
207 accept; this results in impossible error messages when a later operation
210 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
211 return error codes indicating retry. Under TLS1.3 this becomes required.
213 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
214 it only wrote the new authenticators, resulting in a lack of tracking of
215 peer changes of ESMTP extensions until the next cache flush.
217 JH/41 Fix the loop reading a message header line to check for integer overflow,
218 and more-often against header_maxsize. Previously a crafted message could
219 induce a crash of the recive process; now the message is cleanly rejected.
221 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
222 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
228 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
229 When redis_servers is set to a list of > 1 element, and the Redis servers
230 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
231 case of MOVED into a DEFER case instead, thus moving the query onto the
232 next server in the list. For a cluster of N elements, all N servers must
233 be defined in redis_servers.
235 GF/02 Catch and remove uninitialized value warning in exiqsumm
236 Check for existence of @ARGV before looking at $ARGV[0]
238 JH/01 Replace the store_release() internal interface with store_newblock(),
239 which internalises the check required to safely use the old one, plus
240 the allocate and data copy operations duplicated in both (!) of the
241 extant use locations.
243 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
244 modifier. This matches the restriction on the commandline.
246 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
247 Previously only the last row was returned.
249 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
250 we assumed that tags in the header were well-formed, and parsed the
251 element content after inspecting only the first char of the tag.
252 Assumptions at that stage could crash the receive process on malformed
255 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
256 While running the DKIM ACL we operate on the Permanent memory pool so that
257 variables created with "set" persist to the DATA ACL. Also (at any time)
258 DNS lookups that fail create cache records using the Permanent pool. But
259 expansions release any allocations made on the current pool - so a dnsdb
260 lookup expansion done in the DKIM ACL releases the memory used for the
261 DNS negative-cache, and bad things result. Solution is to switch to the
262 Main pool for expansions.
263 While we're in that code, add checks on the DNS cache during store_reset,
264 active in the testsuite.
265 Problem spotted, and debugging aided, by Wolfgang Breyha.
267 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
268 When none of the hosts presented to a transport match an already-open
269 connection, close it and proceed with the list. Previously we would
270 queue the message. Spotted by Lena with Yahoo, probably involving
273 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
274 Previously a spurious "250 OK id=" response was appended to the proper
277 JH/08 The "support for" informational output now, which built with Content
278 Scanning support, has a line for the malware scanner interfaces compiled
279 in. Interface can be individually included or not at build time.
281 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
282 by the template makefile "src/EDITME". The "STREAM" support for an older
283 ClamAV interface method is removed.
285 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
286 rows affected is given instead).
288 JH/11 The runtime Berkeley DB library version is now additionally output by
289 "exim -d -bV". Previously only the compile-time version was shown.
291 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
292 SMTP connection. Previously, when one had more receipients than the
293 first, an abortive onward connection was made. Move to full support for
294 multiple onward connections in sequence, handling cutthrough connection
295 for all multi-message initiating connections.
297 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
298 routers. Previously, a multi-recipient message would fail to match the
299 onward-connection opened for the first recipient, and cause its closure.
301 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
302 a timeout on read on a GnuTLS initiating connection, resulting in the
303 initiating connection being dropped. This mattered most when the callout
304 was marked defer_ok. Fix to keep the two timeout-detection methods
307 JH/15 Relax results from ACL control request to enable cutthrough, in
308 unsupported situations, from error to silently (except under debug)
309 ignoring. This covers use with PRDR, frozen messages, queue-only and
312 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
314 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
315 metadata, resulting in a crash in free().
317 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
318 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
319 Broken also in d185889f4, with init system revamp.
321 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
322 Previously we abruptly closed the connection after reading a malware-
323 found indication; now we go on to read the "scan ok" response line,
326 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
327 ACL. Previously, a crash would result.
329 JH/19 Speed up macro lookups during configuration file read, by skipping non-
330 macro text after a replacement (previously it was only once per line) and
331 by skipping builtin macros when searching for an uppercase lead character.
333 JH/20 DANE support moved from Experimental to mainline. The Makefile control
334 for the build is renamed.
336 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
337 was allocated for every new TLS startup, meaning one per message. Fix
338 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
340 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
341 reported the original. Fix to report (as far as possible) the ACL
342 result replacing the original.
344 JH/23 Fix memory leak during multi-message connections using STARTTLS under
345 OpenSSL. Certificate information is loaded for every new TLS startup,
346 and the resources needed to be freed.
348 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
350 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
353 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
354 DATA response info to the (existing) per-recipient response info for
355 the "C=" log element. It can have useful tracking info from the
356 destination system. Patch from Simon Arlott.
358 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
359 length value. Previously this would segfault.
361 HS/02 Support Avast multiline protoocol, this allows passing flags to
362 newer versions of the scanner.
364 JH/28 Ensure that variables possibly set during message acceptance are marked
365 dead before release of memory in the daemon loop. This stops complaints
366 about them when the debug_store option is enabled. Discovered specifically
367 for sender_rate_period, but applies to a whole set of variables.
368 Do the same for the queue-runner and queue-list loops, for variables set
369 from spool message files. Do the same for the SMTP per-message loop, for
370 certain variables indirectly set in ACL operations.
372 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
373 as a multi-recipient message from a mailinglist manager). The coding had
374 an arbitrary cutoff number of characters while checking for more input;
375 enforced by writing a NUL into the buffer. This corrupted long / fast
376 input. The problem was exposed more widely when more pipelineing of SMTP
377 responses was introduced, and one Exim system was feeding another.
378 The symptom is log complaints of SMTP syntax error (NUL chars) on the
379 receiving system, and refused recipients seen by the sending system
380 (propating to people being dropped from mailing lists).
381 Discovered and pinpointed by David Carter.
383 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
384 replaced by the ${authresults } expansion.
386 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
388 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
389 allows proper process termination in container environments.
391 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
392 Previously the "final dot" had a newline after it; ensure it is CR,LF.
394 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
395 and "err_perm", deprecated since 4.83 when the RFC-defined words
396 "temperror" and "permerror" were introduced.
398 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
399 transport-filters or DKIM-signing. The restriction was lost in the
400 consolidation of verify-callout and delivery SMTP handling.
401 Extend the restriction to also cover ARC-signing.
403 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
404 in defer=pass mode supply a 450 to the initiator. Previously the message
407 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
408 tls_require_ciphers is used as before.
410 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
411 "pass_unscanned". Only tmpfails from the scanner are written to
412 the paniclog, as they may require admin intervention (permission
413 denied, license issues). Other scanner errors (like decompression
414 bombs) do not cause a paniclog entry.
416 JH/36 Fix reinitialisation of DKIM logging variable between messages.
417 Previously it was possible to log spurious information in receive log
420 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
421 triggered odd behaviour from Outlook Express clients.
423 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
426 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
427 since the IETF WG has not yet settled on that versus the original
428 "bare" representation.
430 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
431 Previously the millisecond value corrupted the output.
432 Fix also for syslog_pid=no and log_selector +pid, for which the pid
433 corrupted the output.
439 JH/01 Rework error string handling in TLS interface so that the caller in
440 more cases is responsible for logging. This permits library-sourced
441 string to be attached to addresses during delivery, and collapses
442 pairs of long lines into single ones.
444 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
445 during configuration. Wildcards are allowed and expanded.
447 JH/02 Rework error string handling in DKIM to pass more info back to callers.
448 This permits better logging.
450 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
451 do not close it down and have the child transport start it up again on
452 the passed-on TCP connection. Instead, proxy the child (and any
453 subsequent ones) for TLS via a unix-domain socket channel. Logging is
454 affected: the continued delivery log lines do not have any DNSSEC, TLS
455 Certificate or OCSP information. TLS cipher information is still logged.
457 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
458 identical IP addresses on different listening ports. Will also affect
461 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
462 add noisy ifdef guards to special-case this sillyness.
463 Patch from Bernd Kuhls.
465 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
466 than 255 are no longer allowed.
468 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
469 Disable the session-cache too, which might reduce our load. Since we
470 currrectly use a new context for every connection, both as server and
471 client, there is no benefit for these.
472 GnuTLS appears to not support tickets server-side by default (we don't
473 call gnutls_session_ticket_enable_server()) but client side is enabled
474 by default on recent versions (3.1.3 +) unless the PFS priority string
477 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
478 <https://reproducible-builds.org/specs/source-date-epoch/>.
480 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
481 the check for any unsuccessful recipients did not notice the limit, and
482 erroneously found still-pending ones.
484 JH/08 Pipeline CHUNKING command and data together, on kernels that support
485 MSG_MORE. Only in-clear (not on TLS connections).
487 JH/09 Avoid using a temporary file during transport using dkim. Unless a
488 transport-filter is involved we can buffer the headers in memory for
489 creating the signature, and read the spool data file once for the
490 signature and again for transmission.
492 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
493 4.77 as the kernel support then wasn't solid, having issues in 64bit
494 mode. Now, it's been long enough. Add support for FreeBSD also.
496 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
497 case where the routing stage had gathered several addresses to send to
498 a host before calling the transport for the first, we previously failed
499 to close down TLS in the old transport process before passing the TCP
500 connection to the new process. The new one sent a STARTTLS command
501 which naturally failed, giving a failed delivery and bloating the retry
502 database. Investigation and fix prototype from Wolfgang Breyha.
504 JH/12 Fix check on SMTP command input synchronisation. Previously there were
505 false-negatives in the check that the sender had not preempted a response
506 or prompt from Exim (running as a server), due to that code's lack of
507 awareness of the SMTP input buffering.
509 PP/04 Add commandline_checks_require_admin option.
510 Exim drops privileges sanely, various checks such as -be aren't a
511 security problem, as long as you trust local users with access to their
512 own account. When invoked by services which pass untrusted data to
513 Exim, this might be an issue. Set this option in main configuration
514 AND make fixes to the calling application, such as using `--` to stop
517 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
518 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
519 responses to those, into a single TLS record each way (this usually means
520 a single packet). As a side issue, smtp_enforce_sync now works on TLS
523 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
524 affects you only if you're dancing at the edge of the param size limits.
525 If you are, and this message makes sense to you, then: raise the
526 configured limit or use OpenSSL 1.1. Nothing we can do for older
529 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
530 cmdline element to get the documented default one. Previously it was
533 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
534 are unsuable for non-message-specific reasons - eg. connection timeout,
535 banner-time rejection.
537 JH/16 Fix logging of delivery remote port, when specified by router, under
540 PP/06 Repair manualroute's ability to take options in any order, even if one
541 is the name of a transport.
544 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
546 JH/17 Change the list-building routines interface to use the expanding-string
547 triplet model, for better allocation and copying behaviour.
549 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
550 Previously it was constructed the first time a possibly-matching string
551 was met in the configuration file input during startup; now it is done
554 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
555 compatible one, to avoid the (poorly documented) possibility of a config
556 file in the working directory redirecting the DB files, possibly correpting
557 some existing file. CVE-2017-10140 assigned for BDB.
559 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
560 cache-hot. Previously, although the result was properly cached, the
561 initial verify call returned a defer.
563 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
564 the main verify for receipient in uncached-mode.
566 JH/22 Retire historical build files to an "unsupported" subdir. These are
567 defined as "ones for which we have no current evidence of testing".
569 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
570 if present. Previously it was ignored.
572 JH/24 Start using specified-initialisers in C structure init coding. This is
573 a C99 feature (it's 2017, so now considered safe).
575 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
576 if was a fixed-sized field and bitmask ops via macros; it is now more
579 PP/07 GitHub PR 56: Apply MariaDB build fix.
580 Patch provided by Jaroslav Škarvada.
582 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
583 during Coverity cleanups [4.87 JH/47]
584 Diagnosis and fix provided by Michael Fischer v. Mollard.
586 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
587 the right size to place the terminating semicolon on its own folded
588 line, the header hash was calculated to an incorrect value thanks to
589 the (relaxed) space the fold became.
591 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
592 and confused the parent.
594 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
595 which could crash as a result. This could lead to undeliverable messages.
597 JH/28 Logging: "next input sent too soon" now shows where input was truncated
600 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
601 matters on fast-turnover and PID-randomising systems, which were getting
602 out-of-order delivery.
604 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
605 a possibly-overlapping copy. The symptom was that "Remote host closed
606 connection in response to HELO" was logged instead of the actual 4xx
609 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
610 Previously only that bufferd was discarded, resulting in SYMTP command
613 JH/32 DKIM: when a message has multiple signatures matching an identity given
614 in dkim_verify_signers, run the dkim acl once for each. Previously only
615 one run was done. Bug 2189.
617 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
618 "panic the current process" to "deliberately defer". The panic log is
619 still written with the problem list name; the mail and reject logs now
620 get a temp-reject line for the message that was being handled, saying
621 something like "domains check lookup or other defer". The SMTP 451
622 message is still "Temporary local problem".
624 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
625 A crafted sequence of BDAT commands could result in in-use memory beeing
626 freed. CVE-2017-16943.
628 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
629 from SMTP input. Previously it was always done; now only done for DATA
630 and not BDAT commands. CVE-2017-16944.
632 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
633 to the message (such as an overlong header line). Previously this was
634 not done and we did not exit BDAT mode. Followon from the previous item
635 though a different problem.
641 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
642 than -2003 did; needs libidn2 in addition to libidn.
644 JH/02 The path option on a pipe transport is now expanded before use.
646 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
647 Patch provided by "Björn", documentation fix added too.
649 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
650 missing a wire-to-host endian conversion.
652 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
653 close after a BDAT command line could be taken as a following command,
654 giving a synch failure. Fix by only checking for synch immediately
655 before acknowledging the chunk.
657 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
658 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
659 macro. Patches provided by Josh Soref.
661 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
662 Previously we did not; the RFC seems ambiguous and VRFY is not listed
663 by IANA as a service extension. However, John Klensin suggests that we
666 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
667 the dkim code may be unix-mode line endings rather than smtp wire-format
668 CRLF, so prepend a CR to any bare LF.
670 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
671 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
673 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
674 the first were themselves being wrongly included in the feed into dkim
675 processing; with most chunk sizes in use this resulted in an incorrect
676 body hash calculated value.
678 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
679 DKIM signature block, for verification. Although advised against by
680 standards it is specifically not ruled illegal.
682 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
684 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
685 missing a body hash (the bh= tag).
687 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
688 It seems that HAProxy sends the Proxy Protocol information in clear and
689 only then does a TLS startup, so do the same.
691 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
692 TCP connections (such as for Spamd) unless the daemon successfully set
693 Fast Open mode on its listening sockets. This fixes breakage seen on
694 too-old kernels or those not configured for Fast Open, at the cost of
695 requiring both directions being enabled for TFO, and TFO never being used
696 by non-daemon-related Exim processes.
698 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
699 endings, at least on the first header line. Try to canonify any that get
700 past that check, despite the cost.
702 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
703 now limited to an arbitrary five deep, while parsing addresses with the
704 strip_excess_angle_brackets option enabled.
706 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
707 instead leave the unprompted TLS handshake in socket buffer for the
708 TLS library to consume.
710 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
712 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
714 JH/16 Drop variables when they go out of scope. Memory management drops a whole
715 region in one operation, for speed, and this leaves assigned pointers
716 dangling. Add checks run only under the testsuite which checks all
717 variables at a store-reset and panics on a dangling pointer; add code
718 explicitly nulling out all the variables discovered. Fixes one known
719 bug: a transport crash, where a dangling pointer for $sending_ip_address
720 originally assigned in a verify callout, is re-used.
722 PP/06 Drop '.' from @INC in various Perl scripts.
724 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
726 PP/08 Reduce a number of compilation warnings under clang; building with
727 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
728 should be warning-free.
730 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
732 HS/01 Fix portability problems introduced by PP/08 for platforms where
733 realloc(NULL) is not equivalent to malloc() [SunOS et al].
735 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
736 chunk. This allows us to accept broken chunked messages. We need a more
737 general solution here.
739 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
740 already-broken messages in the queue.
742 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
744 JH/19 Fix reference counting bug in routing-generated-address tracking.
750 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
751 supports it and a size is available (ie. the sending peer gave us one).
753 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
754 years of being deprecated). The replacements are the ACLs
755 acl_smtp_mime and acl_not_smtp_mime.
757 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
758 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
759 or even an in-clear connection were permitted. Now, if the host lookup
760 was dnssec and dane was requested then the host is only used if the
761 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
762 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
763 if one fails this test.
764 This means that a poorly-configured remote DNS will make it incommunicado;
765 but it protects against a DNS-interception attack on it.
767 JH/04 Bug 1810: make continued-use of an open smtp transport connection
768 non-noisy when a race steals the message being considered.
770 JH/05 If main configuration option tls_certificate is unset, generate a
771 self-signed certificate for inbound TLS connections.
773 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
774 in rewrites and routers.
776 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
777 and logged a warning sing 4.83; now they are a configuration file error.
779 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
780 (lacking @domain). Apply the same qualification processing as RCPT.
782 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
784 JH/10 Support ${sha256:} applied to a string (as well as the previous
787 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
788 a cutthrough deliver is pending, as we always want to make a connection.
789 This also avoids re-routing the message when later placing the cutthrough
790 connection after a verify cache hit.
791 Do not update it with the verify result either.
793 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
794 when routing results in more than one destination address.
796 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
797 signing (which inhibits the cutthrough capability). Previously only
798 the presence of an option was tested; now an expansion evaluating as
799 empty is permissible (obviously it should depend only on data available
800 when the cutthrough connection is made).
802 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
803 the relevant preceding SMTP command did not note the pipelining mode.
805 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
806 Previously they were not counted.
808 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
809 as one having no matching records. Previously we deferred the message
810 that needed the lookup.
812 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
813 distinguished as "(=".
815 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
816 for missing MX records. Previously it only worked for missing A records.
818 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
820 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
821 after the data-go-ahead and data-ack. Patch from Jason Betts.
823 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
824 even for a "none" policy. Patch from Tony Meyer.
826 JH/22 Fix continued use of a connection for further deliveries. If a port was
827 specified by a router, it must also match for the delivery to be
830 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
831 When one of the recipients of a message was unsuitable for the connection
832 (has no matching addresses), we lost track of needing to mark it
833 deferred. As a result mail would be lost.
835 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
837 JH/25 Decoding ACL controls is now done using a binary search; the source code
838 takes up less space and should be simpler to maintain. Merge the ACL
839 condition decode tables also, with similar effect.
841 JH/26 Fix problem with one_time used on a redirect router which returned the
842 parent address unchanged. A retry would see the parent address marked as
843 delivered, so not attempt the (identical) child. As a result mail would
846 JH/27 Fix a possible security hole, wherein a process operating with the Exim
847 UID can gain a root shell. Credit to http://www.halfdog.net/ for
848 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
851 JH/28 Enable {spool,log} filesystem space and inode checks as default.
852 Main config options check_{log,spool}_{inodes,space} are now
853 100 inodes, 10MB unless set otherwise in the configuration.
855 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
856 Previously it only applied to the main-section connection policy
859 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
861 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
862 by me. Added RFC7919 DH primes as an alternative.
864 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
865 are not in the system include path.
867 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
868 GnuTLS, when a session startup failed (eg because the client disconnected)
869 Exim did stdio operations after fclose. This was exposed by a recent
870 change which nulled out the file handle after the fclose.
872 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
873 signed directly by the cert-signing cert, rather than an intermediate
874 OCSP-signing cert. This is the model used by LetsEncrypt.
876 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
878 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
879 an incoming connection.
881 HS/02 Bug 1802: Do not half-close the connection after sending a request
884 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
885 fallback to "prime256v1".
887 JH/34 SECURITY: Use proper copy of DATA command in error message.
888 Could leak key material. Remotely exploitable. CVE-2016-9963.
894 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
895 and 3.4.4 - once the server is enabled to respond to an OCSP request
896 it does even when not requested, resulting in a stapling non-aware
897 client dropping the TLS connection.
899 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
900 support variable-length bit vectors. No functional change.
902 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
903 The I= interface field on outgoing lines is now after the H= remote
904 host field, same as incoming lines. There is a separate
905 outgoing_interface log selector which allows you to disable the
908 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
909 If not running log_selector +smtp_connection the mainlog would be held
910 open indefinitely after a "too many connections" event, including to a
911 deleted file after a log rotate. Leave the per net connection logging
912 leaving it open for efficiency as that will be quickly detected by the
913 check on the next write.
915 HS/01 Bug 1671: Fix post transport crash.
916 Processing the wait-<transport> messages could crash the delivery
917 process if the message IDs didn't exist for some reason. When
918 using 'split_spool_directory=yes' the construction of the spool
919 file name failed already, exposing the same netto behaviour.
921 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
922 mime_regex ACL conditions.
924 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
925 to DSN fail messages (bounces): remote IP, remote greeting, remote response
926 to HELO, local diagnostic string.
928 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
929 log line to debug. Even when configured with a tls authenticator many
930 client connections are expected to not authenticate in this way, so
931 an authenticate fail is not an error.
933 HS/02 Add the Exim version string to the process info. This way exiwhat
934 gives some more detail about the running daemon.
936 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
937 matter for fast-change records such as DNSBLs.
939 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
940 retry record, even if constant. There may be multiple transports with
941 different interface settings and the retry behaviour needs to be kept
944 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
946 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
948 JH/10 Bug 840: fix log_defer_output option of pipe transport
950 JH/11 Bug 830: use same host for all RCPTS of a message, even under
951 hosts_randomize. This matters a lot when combined with mua_wrapper.
953 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
954 ${quote_pgsql:<string>} operator.
956 JH/13 Bug 1708: avoid misaligned access in cached lookup.
958 JH/14 Change header file name for freeradius-client. Relevant if compiling
959 with Radius support; from the Gentoo tree and checked under Fedora.
961 JH/15 Bug 1712: Introduce $prdr_requested flag variable
963 JH/16 Bug 1714: Permit an empty string as expansion result for transport
964 option transport_filter, meaning no filtering.
966 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
968 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
969 defaults to "*" (all hosts). The variable is now available when not built
970 with TLS, default unset, mainly to enable keeping the testsuite sane.
971 If a server certificate is not supplied (via tls_certificate) an error is
972 logged, and clients will find TLS connections fail on startup. Presumably
973 they will retry in-clear.
974 Packagers of Exim are strongly encouraged to create a server certificate
975 at installation time.
977 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
978 with the $config_file variable.
980 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
981 in transport context, after the attempt, and per-recipient. The latter type
982 is per host attempted. The event data is the error message, and the errno
983 information encodes the lookup type (A vs. MX) used for the (first) host,
984 and the trailing two digits of the smtp 4xx response.
986 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
987 to write to mainlog (or rejectlog, paniclog) in the window between file
988 creation and permissions/ownership being changed. Particularly affects
989 installations where exicyclog is run as root, rather than exim user;
990 result is that the running daemon panics and dies.
992 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
994 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
995 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
996 "pri" and "weight". Note that the previous implicit priority given by the
997 list order is no longer honoured.
999 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1000 for DKIM processing.
1002 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1003 by defining SUPPORT_SOCKS.
1005 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1006 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1007 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1008 variables are renamed to proxy_{local,external}_{address,port}.
1010 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1011 for a build by defining SUPPORT_I18N
1013 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1014 of the query string, and make ${quote_redis:} do that quoting.
1016 JH/29 Move Events support from Experimental to mainline, enabled by default
1017 and removable for a build by defining DISABLE_EVENT.
1019 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1021 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1022 cached by the daemon.
1024 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1025 by defining LOOKUP_REDIS. The libhiredis library is required.
1027 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1028 keys are given for lookup.
1030 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1031 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1032 only supported when built with TLS support. The PolarSSL SHA routines
1033 are still used when the TLS library is too old for convenient support.
1035 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1036 openssl_options), for security. OpenSSL forces this from version 1.1.0
1037 server-side so match that on older versions.
1039 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1040 allocation for $value could be released as the expansion processing
1041 concluded, but leaving the global pointer active for it.
1043 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1044 and to use the domains and local_parts ACL conditions.
1046 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1047 incorrectly not doubled on cutthrough transmission, hence seen as a
1048 body-termination at the receiving system - resulting in truncated mails.
1049 Commonly the sender saw a TCP-level error, and retransmitted the message
1050 via the normal store-and-forward channel. This could result in duplicates
1051 received - but deduplicating mailstores were liable to retain only the
1052 initial truncated version.
1054 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1056 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1058 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1059 we're in there, support oversigning also; bug 1309.
1061 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1063 HS/04 Add support for keep_environment and add_environment options.
1065 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1066 either intentional arithmetic overflow during PRNG, or testing config-
1069 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1070 delivery resulted in actual delivery. Cancel cutthrough before DATA
1073 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1074 rejects a recipient: pass the reject to the originator.
1076 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1077 Many were false-positives and ignorable, but it's worth fixing the
1080 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1081 for the new environment-manipulation done at startup. Move the routines
1082 from being local to tls.c to being global via the os.c file.
1084 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1085 an extract embedded as result-arg for a map, the first arg for extract
1086 is unavailable so we cannot tell if this is a numbered or keyed
1087 extraction. Accept either.
1093 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1096 JH/02 The smtp transport option "multi_domain" is now expanded.
1098 JH/03 The smtp transport now requests PRDR by default, if the server offers
1101 JH/04 Certificate name checking on server certificates, when exim is a client,
1102 is now done by default. The transport option tls_verify_cert_hostnames
1103 can be used to disable this per-host. The build option
1104 EXPERIMENTAL_CERTNAMES is withdrawn.
1106 JH/05 The value of the tls_verify_certificates smtp transport and main options
1107 default to the word "system" to access the system default CA bundle.
1108 For GnuTLS, only version 3.0.20 or later.
1110 JH/06 Verification of the server certificate for a TLS connection is now tried
1111 (but not required) by default. The verification status is now logged by
1112 default, for both outbound TLS and client-certificate supplying inbound
1115 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1118 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1119 Status Notification (bounce) messages are now MIME format per RFC 3464.
1120 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1121 under the control of the dsn_advertise_hosts option, and routers may
1122 have a dsn_lasthop option.
1124 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1125 default, modifiable by a malware= option. The list separator for
1126 the options can now be changed in the usual way. Bug 68.
1128 JH/10 The smtp_receive_timeout main option is now expanded before use.
1130 JH/11 The incoming_interface log option now also enables logging of the
1131 local interface on delivery outgoing connections.
1133 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1134 if the interface and destination host and port all match.
1136 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1139 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1140 Patch from Andrew Lewis.
1142 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1143 now supports optional time-restrictions, weighting, and priority
1144 modifiers per server. Patch originally by <rommer@active.by>.
1146 JH/16 The spamd_address main option now supports a mixed list of local
1147 and remote servers. Remote servers can be IPv6 addresses, and
1148 specify a port-range.
1150 JH/17 Bug 68: The spamd_address main option now supports an optional
1151 timeout value per server.
1153 JH/18 Bug 1581: Router and transport options headers_add/remove can
1154 now have the list separator specified.
1156 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1159 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1162 JH/21 Support for the A6 type of dns record is withdrawn.
1164 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1165 rather than the verbs used.
1167 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1168 from 255 to 1024 chars.
1170 JH/24 Verification callouts now attempt to use TLS by default.
1172 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1173 are generic router options now. The defaults didn't change.
1175 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1176 Original patch from Alexander Shikoff, worked over by JH.
1178 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1179 files if ZCAT_COMMAND is not executable.
1181 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1183 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1185 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1186 Normally benign, it bites when the pair was led to by a CNAME;
1187 modern usage is to not canonicalize the domain to a CNAME target
1188 (and we were inconsistent anyway for A-only vs AAAA+A).
1190 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1192 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1193 when evaluating $sender_host_dnssec.
1195 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1196 $sender_helo_dnssec variable.
1198 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1200 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1202 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1204 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1205 documented as working, but never had. Support all but $spam_report.
1207 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1208 added for tls authenticator.
1210 HS/03 Add perl_taintmode main config option
1216 TL/01 When running the test suite, the README says that variables such as
1217 no_msglog_check are global and can be placed anywhere in a specific
1218 test's script, however it was observed that placement needed to be near
1219 the beginning for it to behave that way. Changed the runtest perl
1220 script to read through the entire script once to detect and set these
1221 variables, reset to the beginning of the script, and then run through
1222 the script parsing/test process like normal.
1224 TL/02 The BSD's have an arc4random API. One of the functions to induce
1225 adding randomness was arc4random_stir(), but it has been removed in
1226 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1227 function when detected.
1229 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1230 cause callback expansion.
1232 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1233 syntax errors in an expansion can be treated as a string instead of
1234 logging or causing an error, due to the internal use of bool_lax
1235 instead of bool when processing it.
1237 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1238 server certificates when making smtp deliveries.
1240 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1242 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1244 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1246 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1247 Merged patch from Sebastian Wiedenroth.
1249 JH/05 Fix results-pipe from transport process. Several recipients, combined
1250 with certificate use, exposed issues where response data items split
1251 over buffer boundaries were not parsed properly. This eventually
1252 resulted in duplicates being sent. This issue only became common enough
1253 to notice due to the introduction of connection certificate information,
1254 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1256 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1257 size buffer was used, resulting in syntax errors when an expansion
1260 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1261 version 3.3.6 or later.
1263 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1264 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1265 both become "event_action", the variables become $event_name, $event_data
1266 and $event_defer_errno. There is a new variable $verify_mode, usable in
1267 routers, transports and related events. The tls:cert event is now also
1268 raised for inbound connections, if the main configuration event_action
1271 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1272 early OCSP support, but no stapling (appears to be less than 1.0.0).
1274 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1275 server certificate names available under the smtp transport option
1276 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1279 JH/10 Time-related extraction expansions from certificates now use the main
1280 option "timezone" setting for output formatting, and are consistent
1281 between OpenSSL and GnuTLS compilations. Bug 1541.
1283 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1284 encoded parameter in the incoming message. Bug 1558.
1286 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1287 include certificate info, eximon was claiming there were spoolfile
1290 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1292 JH/14 Log delivery-related information more consistently, using the sequence
1293 "H=<name> [<ip>]" wherever possible.
1295 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1296 are problematic for Debian distribution, omit them from the release
1299 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1301 JH/16 Fix string representation of time values on 64bit time_t architectures.
1304 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1305 output list separator was used.
1310 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1311 checkers that were complaining about end of non-void function with no
1314 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1315 This was a regression introduced in 4.83 by another bugfix.
1317 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1319 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1320 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1326 TF/01 Correctly close the server side of TLS when forking for delivery.
1328 When a message was received over SMTP with TLS, Exim failed to clear up
1329 the incoming connection properly after forking off the child process to
1330 deliver the message. In some situations the subsequent outgoing
1331 delivery connection happened to have the same fd number as the incoming
1332 connection previously had. Exim would try to use TLS and fail, logging
1333 a "Bad file descriptor" error.
1335 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1336 utilities have not been installed.
1338 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1339 temporary space as the ACL may create new global variables.
1341 TL/01 LDAP support uses per connection or global context settings, depending
1342 upon the detected version of the libraries at build time.
1344 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1345 to extract and use the src ip:port in logging and expansions as if it
1346 were a direct connection from the outside internet. PPv2 support was
1347 updated based on HAProxy spec change in May 2014.
1349 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1351 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1352 Properly escape header and check for NULL return.
1354 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1357 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1359 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1360 characters in header names, implemented as a verify condition.
1361 Contributed by Michael Fischer v. Mollard.
1363 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1364 results permerror and temperror. Previous values are deprecated but
1365 still accepted. In a future release, err_perm and err_temp will be
1366 completely removed, which will be a backward incompatibility if the
1367 ACL tests for either of these two old results. Patch contributed by
1368 user bes-internal on the mailing list.
1370 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1372 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1373 selectors, in both main and reject logs.
1375 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1378 JH/07 Add malware type "sock" for talking to simple daemon.
1380 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1382 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1383 routers/transports under cutthrough routing.
1385 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1386 numbers. Touch up "bool" conditional to keep the same definition.
1388 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1390 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1392 JH/12 Expand items in router/transport headers_add or headers_remove lists
1393 individually rather than the list as a whole. Bug 1452.
1395 Required for reasonable handling of multiple headers_ options when
1396 they may be empty; requires that headers_remove items with embedded
1397 colons must have them doubled (or the list-separator changed).
1399 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1400 view the policy declared in the DMARC record. Currently, $dmarc_status
1401 is a combined value of both the record presence and the result of the
1404 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1406 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1407 dnslookup router and the smtp transport (applying to the forward
1410 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1411 of ldap servers used for a specific lookup. Patch provided by Heiko
1414 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1415 New variable $lookup_dnssec_authenticated for observability.
1417 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1418 Patch submitted by Lars Timman.
1420 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1422 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1423 Requires trusted mode and valid format message id, aborts otherwise.
1424 Patch contributed by Heiko Schlichting.
1426 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1427 certextract with support for various fields. Bug 1358.
1429 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1430 is requested by default, modifiable by smtp transport option
1433 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1434 operate on certificate variables to give certificate fingerprints
1435 Also new ${sha256:cert_variable}.
1437 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1439 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1440 Christian Aistleitner.
1442 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1444 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1445 file. Patch from Wolfgang Breyha.
1447 JH/25 Expand the coverage of the delivery $host and $host_address to
1448 client authenticators run in verify callout. Bug 1476.
1450 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1451 align with daemon_smtp_ports. Bug 72.
1453 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1454 support and error reporting did not work properly.
1456 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1457 and is readable. Patch from Andrew Colin Kissa.
1459 TL/14 Enhance documentation of ${run expansion and how it parses the
1460 commandline after expansion, particularly in the case when an
1461 unquoted variable expansion results in an empty value.
1463 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1465 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1466 by renaming away from it. Addresses GH issue 15, reported by
1469 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1471 TL/15 SECURITY: prevent double expansion in math comparison functions
1472 (can expand unsanitized data). Not remotely exploitable.
1479 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1481 PP/02 Make -n do something, by making it not do something.
1482 When combined with -bP, the name of an option is not output.
1484 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1487 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1488 $sender_host_name and config options to manage this, and basic check
1491 PP/05 DSCP support for outbound connections and control modifier for inbound.
1493 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1494 (Only plugin which currently uses this is kerberos4, which nobody should
1495 be using, but we should make it available and other future plugins might
1496 conceivably use it, even though it would break NAT; stuff *should* be
1497 using channel bindings instead).
1499 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1500 name; added for Sendmail compatibility; requires admin caller.
1501 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1502 just ignore it); requires trusted caller.
1503 Also parse but ignore: -Ac -Am -X<logfile>
1506 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1508 TL/02 Add +smtp_confirmation as a default logging option.
1510 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1511 Patch by Magnus Holmgren from 2007-02-20.
1513 TL/04 Bugzilla 1281 - Spec typo.
1514 Bugzilla 1283 - Spec typo.
1515 Bugzilla 1290 - Spec grammar fixes.
1517 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1519 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1521 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1522 mailing list by by Dmitry Isaikin.
1524 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1526 JH/02 Support "G" suffix to numbers in ${if comparisons.
1528 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1530 NM/01 Bugzilla 1197 - Spec typo
1531 Bugzilla 1196 - Spec examples corrections
1533 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1535 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1536 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1539 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1540 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1542 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1543 "acl {{name}{arg}...}", and optional args on acl condition
1546 JH/05 Permit multiple router/transport headers_add/remove lines.
1548 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1550 JH/07 Avoid using a waiting database for a single-message-only transport.
1551 Performance patch from Paul Fisher. Bugzilla 1262.
1553 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1556 JH/09 Add $headers_added variable, with content from use of ACL modifier
1557 add_header (but not yet added to the message). Bugzilla 199.
1559 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1560 Pulled from Bugzilla 817 by Wolfgang Breyha.
1562 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1564 (nb: this is the same fix as in Exim 4.80.1)
1566 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1569 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1572 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1574 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1575 advertise SMTP AUTH mechanism to us, instead of a generic
1576 protocol violation error. Also, make Exim more robust to bad
1577 data from the Dovecot auth socket.
1579 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1581 When a queue runner is handling a message, Exim first routes the
1582 recipient addresses, during which it prunes them based on the retry
1583 hints database. After that it attempts to deliver the message to
1584 any remaining recipients. It then updates the hints database using
1587 So if a recipient address works intermittently, it can get repeatedly
1588 deferred at routing time. The retry hints record remains fresh so the
1589 address never reaches the final cutoff time.
1591 This is a fairly common occurrence when a user is bumping up against
1592 their storage quota. Exim had some logic in its local delivery code
1593 to deal with this. However it did not apply to per-recipient defers
1594 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1596 This change adds a proper retry rule check during routing so that the
1597 final cutoff time is checked against the message's age. We only do
1598 this check if there is an address retry record and there is not a
1599 domain retry record; this implies that previous attempts to handle
1600 the address had the retry_use_local_parts option turned on. We use
1601 this as an approximation for the destination being like a local
1602 delivery, as in LMTP.
1604 I suspect this new check makes the old local delivery cutoff check
1605 redundant, but I have not verified this so I left the code in place.
1607 TF/02 Correct gecos expansion when From: is a prefix of the username.
1609 Test 0254 submits a message to Exim with the header
1613 When I ran the test suite under the user fanf2, Exim expanded
1614 the header to contain my full name, whereas it should have added
1615 a Resent-Sender: header. It erroneously treats any prefix of the
1616 username as equal to the username.
1618 This change corrects that bug.
1620 GF/01 DCC debug and logging tidyup
1621 Error conditions log to paniclog rather than rejectlog.
1622 Debug lines prefixed by "DCC: " to remove any ambiguity.
1624 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1626 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1627 Bug spotted by Jeremy Harris; was flawed since initial commit.
1628 Would have resulted in OCSP responses post-SNI triggering an Exim
1629 NULL dereference and crash.
1631 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1633 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1634 Bug detection, analysis and fix by Samuel Thibault.
1635 Bugzilla 1331, Debian bug #698092.
1637 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1639 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1640 Server implementation by Todd Lyons, client by JH.
1641 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1642 config variable "prdr_enable" controls whether the server
1643 advertises the facility. If the client requests PRDR a new
1644 acl_data_smtp_prdr ACL is called once for each recipient, after
1645 the body content is received and before the acl_smtp_data ACL.
1646 The client is controlled by both of: a hosts_try_prdr option
1647 on the smtp transport, and the server advertisement.
1648 Default client logging of deliveries and rejections involving
1649 PRDR are flagged with the string "PRDR".
1651 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1652 fclose(). Diagnosis by Todd Lyons.
1654 PP/17 Update configure.default to handle IPv6 localhost better.
1655 Patch by Alain Williams (plus minor tweaks).
1658 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1659 This is now consistent with GnuTLS, and is now documented: the
1660 previous undocumented portable approach to treating the option as
1661 unset was to force an expansion failure. That still works, and
1662 an empty string is now equivalent.
1664 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1665 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1666 not performing validation itself.
1668 PP/20 Added force_command boolean option to pipe transport.
1669 Patch from Nick Koston, of cPanel Inc.
1671 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1674 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1676 PP/21 Fix eximon continuous updating with timestamped log-files.
1677 Broken in a format-string cleanup in 4.80, missed when I repaired the
1678 other false fix of the same issue.
1679 Report and fix from Heiko Schlichting.
1682 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1683 Report from Prashanth Katuri.
1685 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1686 It's SecureTransport, so affects any MacOS clients which use the
1687 system-integrated TLS libraries, including email clients.
1689 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1690 using a MIME ACL for non-SMTP local injection.
1691 Report and assistance in diagnosis by Warren Baker.
1693 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1695 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1697 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1698 last id that failed so it may be referenced in subsequent ACL's.
1700 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1703 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1704 ldap library initialization, allowing self-signed CA's to be
1705 used. Also properly sets require_cert option later in code by
1706 using NULL (global ldap config) instead of ldap handle (per
1707 session). Bug diagnosis and testing by alxgomz.
1709 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1710 the src/util/ subdirectory.
1712 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1713 renamed to Transport Post Delivery Action by Jeremy Harris, as
1716 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1717 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1718 redis_servers = needs to be configured which will be used by the redis
1719 lookup. Patch from Warren Baker, of The Packet Hub.
1721 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1723 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1724 hostname or reverse DNS when processing a host list. Used suggestions
1725 from multiple comments on this bug.
1727 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1729 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1730 Missed a few lines, added it to make the runtest require no keyboard
1733 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1734 contains upper case chars. Make router use caseful_local_part.
1736 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1737 support when GnuTLS has been built with p11-kit.
1743 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1745 This, or similar/improved, will also be change PP/11 of 4.82.
1751 PP/01 Handle short writes when writing local log-files.
1752 In practice, only affects FreeBSD (8 onwards).
1753 Bugzilla 1053, with thanks to Dmitry Isaikin.
1755 NM/01 Bugzilla 949 - Documentation tweak
1757 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1760 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1762 PP/02 Implemented gsasl authenticator.
1764 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1766 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1767 `pkg-config foo` for cflags/libs.
1769 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1770 with rest of GSASL and with heimdal_gssapi.
1772 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1773 `pkg-config foo` for cflags/libs for the TLS implementation.
1775 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1776 properties get this fed in as external SSF. A number of robustness
1777 and debugging improvements to the cyrus_sasl authenticator.
1779 PP/08 cyrus_sasl server now expands the server_realm option.
1781 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1782 Patch by Jeremy Harris.
1784 PP/10 Added dbmjz lookup type.
1786 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1788 PP/12 MAIL args handles TAB as well as SP, for better interop with
1789 non-compliant senders.
1790 Analysis and variant patch by Todd Lyons.
1792 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1793 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1794 Patch from Dirk Mueller <dmueller@suse.com>
1796 PP/13 tls_peerdn now print-escaped for spool files.
1797 Observed some $tls_peerdn in wild which contained \n, which resulted
1798 in spool file corruption.
1800 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1801 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1802 or write after TLS renegotiation, which otherwise led to messages
1805 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1806 as a tracking header (ie: a signed header comes before the signature).
1807 Patch from Wolfgang Breyha.
1809 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1810 comma-sep list; embedded commas doubled.
1812 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1814 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1816 Report and patch from Dmitry Banschikov.
1818 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1819 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1820 failures. We appear to now support TLS1.1+ with Exim.
1822 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1823 lets Exim select keys and certificates based upon TLS SNI from client.
1824 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1825 before an outbound SMTP session. New log_selector, +tls_sni.
1827 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1828 NULL dereference. Report and patch from Alun Jones.
1830 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1831 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1832 Not seeing resolver debug output on NetBSD, but suspect this is a
1833 resolver implementation change.
1835 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1836 Left warnings. Added "eximon gdb" invocation mode.
1838 PP/21 Defaulting "accept_8bitmime" to true, not false.
1840 PP/22 Added -bw for inetd wait mode support.
1842 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1843 locate the relevant includes and libraries. Made this the default.
1845 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1846 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1848 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1849 This may cause build issues on older platforms.
1851 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1852 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1853 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1854 Added SNI support via GnuTLS too.
1855 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1857 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1859 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1860 Applied second patch from Janne, implementing suggestion to default
1861 multiple-strings-in-record handling to match SPF spec.
1863 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1865 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1866 read-only, out of scope).
1867 Patch from Wolfgang Breyha, report from Stuart Northfield.
1869 PP/29 Fix three issues highlighted by clang analyser static analysis.
1870 Only crash-plausible issue would require the Cambridge-specific
1871 iplookup router and a misconfiguration.
1872 Report from Marcin Mirosław.
1874 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1876 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1877 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1878 As part of this, removing so much warning spew let me fix some minor
1879 real issues in debug logging.
1881 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1882 assignment on my part. Fixed.
1884 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1885 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1886 Janne Snabb (who went above and beyond: thank you).
1888 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1889 string otherwise requires a connection and a bunch more work and it's
1890 relatively easy to get wrong. Should also expose TLS library linkage
1893 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1894 64-bit ${eval} (JH/03).
1896 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1897 GNU libc to support some of the 64-bit stuff, should not lead to
1898 conflicts. Defined before os.h is pulled in, so if a given platform
1899 needs to override this, it can.
1901 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1902 protection layer was required, which is not implemented.
1903 Bugzilla 1254, patch from Wolfgang Breyha.
1905 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1906 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1907 tls_dhparam take prime identifiers. Also unbreak combination of
1908 OpenSSL+DH_params+TLSSNI.
1910 PP/39 Disable SSLv2 by default in OpenSSL support.
1916 PP/01 Solaris build fix for Oracle's LDAP libraries.
1917 Bugzilla 1109, patch from Stephen Usher.
1919 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1921 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1924 TF/02 Fix a couple more cases where we did not log the error message
1925 when unlink() failed. See also change 4.74-TF/03.
1927 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1928 lock up or crash if it happened to be inside a call to libc when it
1929 got a SIGUSR1 from exiwhat.
1931 The SIGUSR1 handler appends the current process status to the process
1932 log which is later printed by exiwhat. It used to use the general
1933 purpose logging code to do this, but several functions it calls are
1934 not safe for signals.
1936 The new output code in the SIGUSR1 handler is specific to the process
1937 log, and simple enough that it's easy to inspect for signal safety.
1938 Removing some special cases also simplifies the general logging code.
1939 Removing the spurious timestamps from the process log simplifies
1942 TF/04 Improved ratelimit ACL condition.
1944 The /noupdate option has been deprecated in favour of /readonly which
1945 has clearer semantics. The /leaky, /strict, and /readonly update modes
1946 are mutually exclusive. The update mode is no longer included in the
1947 database key; it just determines when the database is updated. (This
1948 means that when you upgrade Exim will forget old rate measurements.)
1950 Exim now checks that the per_* options are used with an update mode that
1951 makes sense for the current ACL. For example, when Exim is processing a
1952 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1953 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1954 must specify per_mail/readonly. If you omit the update mode it defaults to
1955 /leaky where that makes sense (as before) or /readonly where required.
1957 The /noupdate option is now undocumented but still supported for
1958 backwards compatibility. It is equivalent to /readonly except that in
1959 ACLs where /readonly is required you may specify /leaky/noupdate or
1960 /strict/noupdate which are treated the same as /readonly.
1962 A useful new feature is the /count= option. This is a generalization
1963 of the per_byte option, so that you can measure the throughput of other
1964 aggregate values. For example, the per_byte option is now equivalent
1965 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1967 The per_rcpt option has been generalized using the /count= mechanism
1968 (though it's more complicated than the per_byte equivalence). When it is
1969 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1970 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1971 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1972 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1973 Note that using per_rcpt with a non-readonly update mode in more than
1974 one ACL will cause the recipients to be double-counted. (The per_mail
1975 and per_byte options don't have this problem.)
1977 The handling of very low rates has changed slightly. If the computed rate
1978 is less than the event's count (usually one) then this event is the first
1979 after a long gap. In this case the rate is set to the same as this event's
1980 count, so that the first message of a spam run is counted properly.
1982 The major new feature is a mechanism for counting the rate of unique
1983 events. The new per_addr option counts the number of different
1984 recipients that someone has sent messages to in the last time period. It
1985 behaves like per_rcpt if all the recipient addresses are different, but
1986 duplicate recipient addresses do not increase the measured rate. Like
1987 the /count= option this is a general mechanism, so the per_addr option
1988 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1989 example, measure the rate that a client uses different sender addresses
1990 with the options per_mail/unique=$sender_address. There are further
1991 details in the main documentation.
1993 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1995 TF/06 Removed a few PCRE remnants.
1997 TF/07 Automatically extract Exim's version number from tags in the git
1998 repository when doing development or release builds.
2000 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2001 Bugzilla 879. Patch from Paul Fisher.
2003 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2004 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2007 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2009 PP/05 Variable $av_failed, true if the AV scanner deferred.
2010 Bugzilla 1078. Patch from John Horne.
2012 PP/06 Stop make process more reliably on build failure.
2013 Bugzilla 1087. Patch from Heiko Schlittermann.
2015 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2016 Bugzilla 1089. Patch from Heiko Schlittermann.
2018 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2019 Bugzilla 1131. Patch from Holger Weiß.
2021 PP/09 Handle IPv6 addresses with SPF.
2022 Bugzilla 860. Patch from Wolfgang Breyha.
2024 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2026 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2029 PP/11 match_* no longer expand right-hand-side by default.
2030 New compile-time build option, EXPAND_LISTMATCH_RHS.
2031 New expansion conditions, "inlist", "inlisti".
2033 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2035 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2037 PP/14 fix log_write() format string regression from TF/03.
2038 Bugzilla 1152. Patch from Dmitry Isaikin.
2044 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2046 PP/02 Harmonised TLS library version reporting; only show if debugging.
2047 Layout now matches that introduced for other libraries in 4.74 PP/03.
2049 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2051 PP/04 New "dns_use_edns0" global option.
2053 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2056 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2057 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2059 TK/01 Updated PolarSSL code to 0.14.2.
2060 Bugzilla 1097. Patch from Andreas Metzler.
2062 PP/07 Catch divide-by-zero in ${eval:...}.
2063 Fixes bugzilla 1102.
2065 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2068 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2069 format-string attack -- SECURITY: remote arbitrary code execution.
2071 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2072 time unintentionally subject to list matching rules, letting the header
2073 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2074 arbitrary string expansion). This allowed for information disclosure.
2076 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2077 INT_MIN/-1 -- value coerced to INT_MAX.
2083 NM/01 Workaround for PCRE version dependency in version reporting
2086 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2087 This fixes portability to compilers other than gcc, notably
2088 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2090 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2091 makefiles for portability to HP-UX and POSIX correctness.
2093 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2094 Also via indented variable definition in the Makefile.
2095 (Debugging by Oliver Heesakkers).
2097 PP/02 Restore caching of spamd results with expanded spamd_address.
2098 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2100 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2101 Improves build reliability. Fix from: Frank Elsner
2103 NM/02 Fix wide character breakage in the rfc2047 coding
2104 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2106 NM/03 Allow underscore in dnslist lookups
2107 Fixes bug 1026. Patch from Graeme Fowler
2109 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2110 Code patches from Adam Ciarcinski of NetBSD.
2112 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2115 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2116 is logged, to avoid truncation. Patch from John Horne.
2118 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2119 Patch from Jakob Hirsch.
2121 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2122 SQL string expansion failure details.
2123 Patch from Andrey Oktyabrski.
2125 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2126 Patch from Simon Arlott.
2128 PP/09 New lookups functionality failed to compile on old gcc which rejects
2129 extern declarations in function scope.
2130 Patch from Oliver Fleischmann
2132 PP/10 Use sig_atomic_t for flags set from signal handlers.
2133 Check getgroups() return and improve debugging.
2134 Fixed developed for diagnosis in bug 927 (which turned out to be
2137 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2138 Patch from Mark Zealey.
2140 PP/12 Bugzilla 1056: Improved spamd server selection.
2141 Patch from Mark Zealey.
2143 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2144 Based on patch from Heiko Schlittermann.
2146 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2147 Patch from Uwe Doering, sign-off by Michael Haardt.
2149 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2150 variable declaration deep within a block. Bug and patch from
2153 PP/15 lookups-Makefile IRIX compatibility coercion.
2155 PP/16 Make DISABLE_DKIM build knob functional.
2157 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2158 Patch by Simon Arlott
2160 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2161 variable argument macros. Our copy now differs from upstream.
2167 TF/01 Failure to get a lock on a hints database can have serious
2168 consequences so log it to the panic log.
2170 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2171 controlled using the smtp_confirmation log selector.
2173 TF/03 Include the error message when we fail to unlink a spool file.
2175 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2176 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2177 for maintaining out-of-tree patches for some time.
2179 PP/01 Bugzilla 139: Documentation and portability issues.
2180 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2181 Handle per-OS dynamic-module compilation flags.
2183 PP/02 Let /dev/null have normal permissions.
2184 The 4.73 fixes were a little too stringent and complained about the
2185 permissions on /dev/null. Exempt it from some checks.
2186 Reported by Andreas M. Kirchwitz.
2188 PP/03 Report version information for many libraries, including
2189 Exim version information for dynamically loaded libraries. Created
2190 version.h, now support a version extension string for distributors
2191 who patch heavily. Dynamic module ABI change.
2193 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2194 privilege escalation vulnerability whereby the Exim run-time user
2195 can cause root to append content of the attacker's choosing to
2198 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2201 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2202 If dropping privileges for untrusted macros, we disabled normal logging
2203 on the basis that it would fail; for the Exim run-time user, this is not
2204 the case, and it resulted in successful deliveries going unlogged.
2205 Fixed. Reported by Andreas Metzler.
2211 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2212 only prepend for the Resent-* case. Fixes regression introduced in
2213 Exim 4.70 by NM/22 for Bugzilla 607.
2215 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2216 increasing numbers of administrators be bitten by this.
2218 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2220 PP/03 Bugzilla 994: added openssl_options main configuration option.
2222 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2224 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2226 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2228 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2229 without a peer certificate, leading to a segfault because of an
2230 assumption that peers always have certificates. Be a little more
2231 paranoid. Problem reported by Martin Tscholak.
2233 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2234 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2235 NB: ClamAV planning to remove STREAM in "middle of 2010".
2236 CL also introduces -bmalware, various -d+acl logging additions and
2237 more caution in buffer sizes.
2239 PP/09 Implemented reverse_ip expansion operator.
2241 PP/10 Bugzilla 937: provide a "debug" ACL control.
2243 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2245 PP/12 Bugzilla 973: Implement --version.
2247 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2249 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2251 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2253 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2254 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2255 ignore trailing whitespace.
2257 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2259 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2262 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2263 Notification from Dr Andrew Aitchison.
2265 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2266 ExtendedDetectionInfo response format.
2267 Notification from John Horne.
2269 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2272 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2273 XSL and documented dependency on system catalogs, with examples of how
2276 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2279 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2280 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2281 configuration file which is writeable by the Exim user or group.
2283 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2284 of configuration files to cover files specified with the -C option if
2285 they are going to be used with root privileges, not just the default
2288 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2289 option (effectively making it always true).
2291 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2292 files to be used while preserving root privileges.
2294 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2295 that rogue child processes cannot use them.
2297 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2298 run-time user, instead of root.
2300 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2301 Exim run-time user without dropping privileges.
2303 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2304 result string, instead of calling string_vformat() twice with the same
2307 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2308 for other users. Others should always drop root privileges if they use
2309 -C on the command line, even for a whitelisted configure file.
2311 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2313 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2319 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2320 $data_path, and $header_path variables; fixed documentation bugs and
2323 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2324 exipick to access non-standard spools, including the "frozen" queue
2327 NM/01 Bugzilla 965: Support mysql stored procedures.
2328 Patch from Alain Williams
2330 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2332 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2333 Patch from Andreas Metzler
2335 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2336 Patch from Kirill Miazine
2338 NM/05 Bugzilla 671: Added umask to procmail example.
2340 JJ/03 installed exipick 20100323.0, fixing doc bug
2342 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2343 directory. Notification and patch from Dan Rosenberg.
2345 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2347 TK/02 Improve log output when DKIM signing operation fails.
2349 MH/01 Treat the transport option dkim_domain as a colon separated
2350 list, not as a single string, and sign the message with each element,
2351 omitting multiple occurences of the same signer.
2353 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2354 Bugzilla 985, 986. Patch by Simon Arlott
2356 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2357 Patch by Simon Arlott
2359 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2360 MBX locking. Notification from Dan Rosenberg.
2366 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2368 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2370 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2372 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2374 NM/04 Bugzilla 915: Flag broken perl installation during build.
2380 TK/01 Added patch by Johannes Berg that expands the main option
2381 "spamd_address" if it starts with a dollar sign.
2383 TK/02 Write list of recipients to X-Envelope-Sender header when building
2384 the mbox-format spool file for content scanning (suggested by Jakob
2387 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2388 (http://www.dcc-servers.net/) support via dccifd. Activated by
2389 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2391 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2392 by Mark Daniel Reidel <mr@df.eu>.
2394 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2395 When building exim an external PCRE library is now needed -
2396 PCRE is a system library on the majority of modern systems.
2397 See entry on PCRE_LIBS in EDITME file.
2399 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2400 conversation. Added nologin parameter to request.
2401 Patch contributed by Kirill Miazine.
2403 TF/01 Do not log submission mode rewrites if they do not change the address.
2405 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2407 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2408 log files in place. Contributed by Roberto Lima.
2410 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2412 TF/03 Bugzilla 615: When checking the local_parts router precondition
2413 after a local_part_suffix or local_part_prefix option, Exim now
2414 does not use the address's named list lookup cache, since this
2415 contains cached lookups for the whole local part.
2417 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2418 Robert Millan. Documentation is in experimental-spec.txt.
2420 TF/04 Bugzilla 668: Fix parallel build (make -j).
2422 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2424 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2425 Patch provided by Jan Srzednicki.
2427 TF/05 Leading white space used to be stripped from $spam_report which
2428 wrecked the formatting. Now it is preserved.
2430 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2431 that they are available at delivery time.
2433 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2435 TF/08 TLS error reporting now respects the incoming_interface and
2436 incoming_port log selectors.
2438 TF/09 Produce a more useful error message if an SMTP transport's hosts
2439 setting expands to an empty string.
2441 NM/06 Bugzilla 744: EXPN did not work under TLS.
2442 Patch provided by Phil Pennock.
2444 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2445 Patch provided by Richard Godbee.
2447 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2448 acl_smtp_notquit, added index entry.
2450 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2451 Patch provided by Eugene Bujak.
2453 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2454 accept(). Patch provided by Maxim Dounin.
2456 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2457 Patch provided by Phil Pennock.
2459 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2461 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2462 Patch provided by Brad "anomie" Jorsch.
2464 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2465 Patch provided by Dean Brooks.
2467 TK/05 Add native DKIM support (does not depend on external libraries).
2469 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2470 Patch provided by Graeme Fowler.
2472 NM/16 Bugzilla 851: Documentation example syntax fix.
2474 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2476 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2479 NM/19 Bugzilla 745: TLS version reporting.
2480 Patch provided by Phil Pennock.
2482 NM/20 Bugzilla 167: bool: condition support.
2483 Patch provided by Phil Pennock.
2485 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2486 clients. Patch provided by Phil Pennock.
2488 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2489 Patch provided by Brad "anomie" Jorsch.
2491 NM/23 Bugzilla 687: Fix misparses in eximstats.
2492 Patch provided by Heiko Schlittermann.
2494 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2495 Patch provided by Heiko Schlittermann.
2497 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2498 plus update to original patch.
2500 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2502 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2503 Patch provided by David Brownlee.
2505 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2507 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2509 NM/30 Bugzilla 888: TLS documentation bugfixes.
2511 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2513 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2514 Unlike the original bugzilla I have changed all shell scripts in src tree.
2516 NM/33 Bugzilla 898: Transport filter timeout fix.
2517 Patch by Todd Rinaldo.
2519 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2520 Patch by Serge Demonchaux.
2522 NM/35 Bugzilla 39: Base64 decode bug fixes.
2523 Patch by Jakob Hirsch.
2525 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2527 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2529 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2531 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2537 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2538 ALT-N's libdkim that I have put here:
2539 http://duncanthrax.net/exim-experimental/
2541 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2542 were called 'true' and it seems that C99 defines that as a reserved
2543 keyword to be used with 'bool' variable types. That means you could
2544 not include C99-style headers which use bools without triggering
2545 build errors in sieve.c.
2547 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2548 as mailq or other aliases. Changed the --help handling significantly
2549 to do whats expected. exim_usage() emits usage/help information.
2551 SC/01 Added the -bylocaldomain option to eximstats.
2553 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2555 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2557 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2563 PH/01 Another patch from the Sieve maintainer.
2565 PH/02 When an IPv6 address is converted to a string for single-key lookup
2566 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2567 dots are used instead of colons so that keys in lsearch files need not
2568 contain colons. This was done some time before quoting was made available
2569 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2570 (notated using the quote facility) so as to distinguish them from IPv4
2571 keys. This meant that lookups for IP addresses in host lists did not work
2572 for iplsearch lookups.
2574 This has been fixed by arranging for IPv6 addresses to be expressed with
2575 colons if the lookup type is iplsearch. This is not incompatible, because
2576 previously such lookups could never work.
2578 The situation is now rather anomalous, since one *can* have colons in
2579 ordinary lsearch keys. However, making the change in all cases is
2580 incompatible and would probably break a number of configurations.
2582 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2585 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2586 conversion specification without a maximum field width, thereby enabling
2587 a rogue spamd server to cause a buffer overflow. While nobody in their
2588 right mind would setup Exim to query an untrusted spamd server, an
2589 attacker that gains access to a server running spamd could potentially
2590 exploit this vulnerability to run arbitrary code as the Exim user.
2592 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2593 $primary_hostname instead of what libspf2 thinks the hosts name is.
2595 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2596 a directory entry by the name of the lookup key. Previously, if a
2597 symlink pointed to a non-existing file or a file in a directory that
2598 Exim lacked permissions to read, a lookup for a key matching that
2599 symlink would fail. Now it is enough that a matching directory entry
2600 exists, symlink or not. (Bugzilla 503.)
2602 PH/03 The body_linecount and body_zerocount variables are now exported in the
2605 PH/04 Added the $dnslist_matched variable.
2607 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2608 This means they are set thereafter only if the connection becomes
2611 PH/06 Added the client_condition to authenticators so that some can be skipped
2612 by clients under certain conditions.
2614 PH/07 The error message for a badly-placed control=no_multiline_responses left
2615 "_responses" off the end of the name.
2617 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2619 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2620 (without spaces) instead of just copying the configuration text.
2622 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2624 PH/11 Added $max_received_linelength.
2626 PH/12 Added +ignore_defer and +include_defer to host lists.
2628 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2629 way in which PCRE > 7.0 is built.
2631 PH/14 Implemented queue_only_load_latch.
2633 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2634 MAIL command. The effect was to mangle the value on 64-bit systems.
2636 PH/16 Another patch from the Sieve maintainer.
2638 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2640 PH/18 If a system quota error occurred while trying to create the file for
2641 a maildir delivery, the message "Mailbox is full" was not appended to the
2642 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2643 only to a quota excession during the actual writing of the file.
2645 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2646 characters?) which causes problems in log lines. The DN values are now
2647 passed through string_printing() before being added to log lines.
2649 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2650 and InterBase are left for another time.)
2652 PH/21 Added message_body_newlines option.
2654 PH/22 Guard against possible overflow in moan_check_errorcopy().
2656 PH/23 POSIX allows open() to be a macro; guard against that.
2658 PH/24 If the recipient of an error message contained an @ in the local part
2659 (suitably quoted, of course), incorrect values were put in $domain and
2660 $local_part during the evaluation of errors_copy.
2666 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2667 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2670 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2671 issue a MAIL command.
2673 PH/02 In an ACL statement such as
2675 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2677 if a client was not listed at all, or was listed with a value other than
2678 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2679 the condition was not true (as it should be), so access was not denied.
2680 The bug was that the ! inversion was incorrectly passed on to the second
2681 item. This has been fixed.
2683 PH/03 Added additional dnslists conditions == and =& which are different from
2684 = and & when the dns lookup returns more than one IP address.
2686 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2687 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2689 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2690 FSYNC, which compiles an option called disable_fsync that allows for
2691 bypassing fsync(). The documentation is heavily laced with warnings.
2693 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2695 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2696 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2697 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2698 including adding "make clean"; (3) Added -fPIC when compiling the test
2699 dynamically loaded module, to get rid of a warning.
2701 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2702 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2703 = 0s. The bug is otherwise harmless.
2705 PH/07 There was a bug in the dovecot authenticator such that the value of
2706 $auth1 could be overwritten, and so not correctly preserved, after a
2707 successful authentication. This usually meant that the value preserved by
2708 the server_setid option was incorrect.
2710 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2712 PH/09 Installed PCRE release 7.0.
2714 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2715 run for batched SMTP input. It is now run at the start of every message
2716 in the batch. While fixing this I discovered that the process information
2717 (output by running exiwhat) was not always getting set for -bs and -bS
2718 input. This is fixed, and it now also says "batched" for BSMTP.
2720 PH/11 Added control=no_pipelining.
2722 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2723 patch, slightly modified), and move the expansion of helo_data till after
2724 the connection is made in the smtp transport (so it can use these
2727 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2729 PH/14 Added log_selector = +pid.
2731 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2733 PH/16 Add ${if forany and ${if forall.
2735 PH/17 Added dsn_from option to vary the From: line in DSNs.
2737 PH/18 Flush SMTP output before performing a callout, unless control =
2738 no_callout_flush is set.
2740 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2741 was true (the default) a successful delivery failed to delete the retry
2742 item, thus causing premature timeout of the address. The bug is now
2745 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2747 PH/21 Long custom messages for fakedefer and fakereject are now split up
2748 into multiline responses in the same way that messages for "deny" and
2749 other ACL rejections are.
2751 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2752 with slight modification.
2754 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2755 draft, changing the syntax and factoring some duplicate code".
2757 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2758 for deliveries of the second and subsequent messages over the same SMTP
2761 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2762 ${reduce, with only minor "tidies".
2764 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2766 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2767 expansion side effects.
2769 PH/27 When a message times out after an over-quota error from an Exim-imposed
2770 quota, the bounce message says "mailbox is full". This message was not
2771 being given when it was a system quota that was exceeded. It now should
2774 MH/03 Made $recipients available in local_scan(). local_scan() already has
2775 better access to the recipient list through recipients_list[], but
2776 $recipients can be useful in postmaster-provided expansion strings.
2778 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2779 in the case of a MAIL command with additional options following the
2780 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2781 were accidentally chopped off.
2783 PH/29 SMTP synchronization checks are implemented when a command is read -
2784 there is a check that no more input is waiting when there shouldn't be
2785 any. However, for some commands, a delay in an ACL can mean that it is
2786 some time before the response is written. In this time, more input might
2787 arrive, invalidly. So now there are extra checks after an ACL has run for
2788 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2789 pipelining has not been advertised.
2791 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2793 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2794 returned in the SMTP response when smtp_return_error_details was false.
2795 This has been fixed.
2797 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2798 instead of the C I/O that was originally supplied, because problems were
2799 reported on Solaris.
2801 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2802 Exim which did not show up earlier: it was assuming that a call to
2803 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2804 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2805 was a macro that became an assignment, so it seemed to work. This has
2806 changed to a proper function call with a void return, hence the compile
2807 error. Exim's code has been fixed.
2809 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2812 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2814 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2816 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2817 because it turns out to be too big or there is a timeout) there is no
2818 "Completed" line in the log. When some messages of this type were
2819 selected by exigrep, they were listed as "not completed". Others were
2820 picked up by some special patterns. I have improved the selection
2821 criteria to be more general.
2823 PH/38 The host_find_failed option in the manualroute router can now be set
2824 to "ignore", to completely ignore a host whose IP address cannot be
2825 found. If all hosts are ignored, the behaviour is controlled by the new
2826 host_all_ignored option.
2828 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2829 homing or because of multiple MX records with /mx) generated more than
2830 one IP address, and the following item turned out to be the local host,
2831 all the secondary addresses of the first item were incorrectly removed
2832 from the list, along with the local host and any following hosts (which
2833 is what is supposed to happen).
2835 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2836 whoever called Exim into the -H file. In the case of the daemon it was
2837 behaving confusingly. When first started, it used values for whoever
2838 started the daemon, but after a SIGHUP it used the Exim user (because it
2839 calls itself on a restart). I have changed the code so that it now always
2842 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2843 message are rejected with the same error (e.g. no authentication or bad
2844 sender address), and a DATA command is nevertheless sent (as can happen
2845 with PIPELINING or a stupid MUA), the error message that was given to the
2846 RCPT commands is included in the rejection of the DATA command. This is
2847 intended to be helpful for MUAs that show only the final error to their
2850 PH/42 Another patch from the Sieve maintainer.
2852 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2853 Eximstats - Fixed some broken HTML links and added missing column headers
2855 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2856 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2858 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2860 PH/43 Yet another patch from the Sieve maintainer.
2862 PH/44 I found a way to check for a TCP/IP connection going away before sending
2863 the response to the final '.' that terminates a message, but only in the
2864 case where the client has not sent further data following the '.'
2865 (unfortunately, this is allowed). However, in many cases there won't be
2866 any further data because there won't be any more messages to send. A call
2867 to select() can be used: if it shows that the input is "ready", there is
2868 either input waiting, or the socket has been closed. An attempt to read
2869 the next input character can distinguish the two cases. Previously, Exim
2870 would have sent an OK response which the client would never have see.
2871 This could lead to message repetition. This fix should cure that, at
2872 least in a lot of common cases.
2874 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2875 advertised in response to EHLO.
2881 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2882 fixed by 4.65/MH/01 (is this a record?) are fixed:
2884 (i) An empty string was always treated as zero by the numeric comparison
2885 operators. This behaviour has been restored.
2887 (ii) It is documented that the numeric comparison operators always treat
2888 their arguments as decimal numbers. This was broken in that numbers
2889 starting with 0 were being interpreted as octal.
2891 While fixing these problems I realized that there was another issue that
2892 hadn't been noticed. Values of message_size_limit (both the global option
2893 and the transport option) were treated as octal if they started with 0.
2894 The documentation was vague. These values are now always treated as
2895 decimal, and I will make that clear in the documentation.
2901 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2902 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2905 MH/01 Don't check that the operands of numeric comparison operators are
2906 integers when their expansion is in "skipping" mode (fixes bug
2907 introduced by 4.64-PH/07).
2909 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2910 child addresses, Exim now panics and dies. Previously, because the count
2911 is held in a short int, deliveries were likely to be lost. As such a
2912 large number of recipients for a single message is ridiculous
2913 (performance will be very, very poor), I have chosen to impose a limit
2914 rather than extend the field.
2920 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2921 leftover -K file (the existence of which was triggered by #402).
2922 While we were at it, introduced process PID as part of the -K
2923 filename. This should rule out race conditions when creating
2926 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2927 processing considerably. Previous code took too long for large mails,
2928 triggering a timeout which in turn triggers #401.
2930 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2931 in the DK code in transports.c. sendfile() is not really portable,
2932 hence the _LINUX specificness.
2934 TF/01 In the add_headers option to the mail command in an Exim filter,
2935 there was a bug that Exim would claim a syntax error in any
2936 header after the first one which had an odd number of characters
2939 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2940 callout verification, Exim cached a "reject" for the entire domain. This
2941 is correct for most verifications, but it is not correct for a recipient
2942 verification with use_sender or use_postmaster set, because in that case
2943 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2944 case of MAIL FROM:<> rejection from other early rejections (e.g.
2945 rejection of HELO). When verifying a recipient using a non-null MAIL
2946 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2947 Whatever the result of the callout, the value of the domain cache is
2948 left unchanged (for any other kind of callout, getting as far as trying
2949 RCPT means that the domain itself is ok).
2951 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2954 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2955 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2956 session, the daemon ignores ECONNECT errors and logs others; it now
2957 ignores EPIPE as well.
2959 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2960 (quoted-printable decoding).
2962 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2963 later the small subsequent patch to fix an introduced bug.
2965 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2967 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2969 PH/08 An error is now given if message_size_limit is specified negative.
2971 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2972 to be given (somewhat) arbitrary names.
2974 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2977 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2978 miscellaneous code fixes
2980 PH/10 Added the log_reject_target ACL modifier to specify where to log
2983 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2984 hostname. This is wrong, because it relates to the incoming message (and
2985 probably the interface on which it is arriving) and not to the outgoing
2986 callout (which could be using a different interface). This has been
2987 changed to use the value of the helo_data option from the smtp transport
2988 instead - this is what is used when a message is actually being sent. If
2989 there is no remote transport (possible with a router that sets up host
2990 addresses), $smtp_active_hostname is used.
2992 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2993 tweaks were necessary in order to get it to work (see also 21 below):
2994 (a) The code assumed that strncpy() returns a negative number on buffer
2995 overflow, which isn't the case. Replaced with Exim's string_format()
2997 (b) There were several signed/unsigned issues. I just did the minimum
2998 hacking in of casts. There is scope for a larger refactoring.
2999 (c) The code used strcasecmp() which is not a standard C function.
3000 Replaced with Exim's strcmpic() function.
3001 (d) The code set only $1; it now sets $auth1 as well.
3002 (e) A simple test gave the error "authentication client didn't specify
3003 service in request". It would seem that Dovecot has changed its
3004 interface. Fortunately there's a specification; I followed it and
3005 changed what the client sends and it appears to be working now.
3007 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3010 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3011 address A is aliased to B and C, where B exists and C does not. Without
3012 -v the output is "A verified" because verification stops after a
3013 successful redirection if more than one address is generated. However,
3014 with -v the child addresses are also verified. Exim was outputting "A
3015 failed to verify" and then showing the successful verification for C,
3016 with its parentage. It now outputs "B failed to verify", showing B's
3017 parentage before showing the successful verification of C.
3019 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3020 look up a TXT record in a specific list after matching in a combined
3023 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3024 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3025 they consult the DNS. I had assumed they would set it the way they
3026 wanted; and indeed my experiments on Linux seem to show that in some
3027 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3028 To be on the safe side, however, I have now made the interface to
3029 host_find_byname() similar to host_find_bydns(), with an argument
3030 containing the DNS resolver options. The host_find_byname() function now
3031 sets these options at its start, just as host_find_bydns() does. The smtp
3032 transport options dns_qualify_single and dns_search_parents are passed to
3033 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3034 of host_find_byname() use the default settings of RES_DEFNAMES
3035 (qualify_single) but not RES_DNSRCH (search_parents).
3037 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3038 spool_read_header() do less string testing, by means of a preliminary
3039 switch on the second character of optional "-foo" lines. (This is
3040 overdue, caused by the large number of possibilities that now exist.
3041 Originally there were few.) While I was there, I also converted the
3042 str(n)cmp tests so they don't re-test the leading "-" and the first
3043 character, in the hope this might squeeze out yet more improvement.
3045 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3046 flag allowing group syntax was set by the header_syntax check but not
3047 turned off, possible causing trouble later; (2) The flag was not being
3048 set at all for the header_verify test, causing "group"-style headers to
3049 be rejected. I have now set it in this case, and also caused header_
3050 verify to ignore an empty address taken from a group. While doing this, I
3051 came across some other cases where the code for allowing group syntax
3052 while scanning a header line wasn't quite right (mostly, not resetting
3053 the flag correctly in the right place). These bugs could have caused
3054 trouble for malformed header lines. I hope it is now all correct.
3056 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3057 with the "reply" argument non-NULL. The code, however (which originally
3058 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3059 but it didn't always do it. This confused somebody who was copying the
3060 code for some other use. I have removed all the tests.
3062 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3063 feature that was used to support insecure browsers during the U.S. crypto
3064 embargo. It requires special client support, and Exim is probably the
3065 only MTA that supported it -- and would never use it because real RSA is
3066 always available. This code has been removed, because it had the bad
3067 effect of slowing Exim down by computing (never used) parameters for the
3068 RSA_EXPORT functionality.
3070 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3071 authenticator to fail if there's a tab character in the incoming data
3072 (there should never be unless someone is messing about, as it's supposed
3073 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3074 if the connection is using TLS or if the remote IP is the same as the
3075 local IP, and the "valid-client-cert option" if a client certificate has
3078 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3079 authenticators. This can be used for authorization after authentication
3080 succeeds. (In the case of plaintext, it servers for both authentication
3083 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3084 if any retry times were supplied.
3086 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3087 connection, where there is no client IP address to check. In this
3088 situation, the verify now always succeeds.
3090 PH/25 Applied John Jetmore's -Mset patch.
3092 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3094 PH/27 In a string expansion for a processed (not raw) header when multiple
3095 headers of the same name were present, leading whitespace was being
3096 removed from all of them, but trailing whitespace was being removed only
3097 from the last one. Now trailing whitespace is removed from each header
3098 before concatenation. Completely empty headers in a concatenation (as
3099 before) are ignored.
3101 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3102 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3104 PH/29 [Removed. This was a change that I later backed out, and forgot to
3105 correct the ChangeLog entry (that I had efficiently created) before
3106 committing the later change.]
3108 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3109 address errors (4xx response to RCPT) over the same connection as other
3110 messages routed to the same hosts. Such deliveries are always "forced",
3111 so retry times are not inspected. This resulted in far too many retries
3112 for the affected addresses. The effect occurred only when there were more
3113 hosts than the hosts_max_try setting in the smtp transport when it had
3114 the 4xx errors. Those hosts that it had tried were not added to the list
3115 of hosts for which the message was waiting, so if all were tried, there
3116 was no problem. Two fixes have been applied:
3118 (i) If there are any address or message errors in an SMTP delivery, none
3119 of the hosts (tried or untried) are now added to the list of hosts
3120 for which the message is waiting, so the message should not be a
3121 candidate for sending over the same connection that was used for a
3122 successful delivery of some other message. This seems entirely
3123 reasonable: after all the message is NOT "waiting for some host".
3124 This is so "obvious" that I'm not sure why it wasn't done
3125 previously. Hope I haven't missed anything, but it can't do any
3126 harm, as the worst effect is to miss an optimization.
3128 (ii) If, despite (i), such a delivery is accidentally attempted, the
3129 routing retry time is respected, so at least it doesn't keep
3130 hammering the server.
3132 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3133 in ${readsocket because some servers need this prod.
3135 PH/32 Added some extra debug output when updating a wait-xxx database.
3137 PH/33 The hint "could be header name not terminated by colon", which has been
3138 given for certain expansion errors for a long time, was not being given
3139 for the ${if def:h_colon_omitted{... case.
3141 PH/34 The spec says: "With one important exception, whenever a domain list is
3142 being scanned, $domain contains the subject domain." There was at least
3143 one case where this was not true.
3145 PH/35 The error "getsockname() failed: connection reset by peer" was being
3146 written to the panic log as well as the main log, but it isn't really
3147 panic-worthy as it just means the connection died rather early on. I have
3148 removed the panic log writing for the ECONNRESET error when getsockname()
3151 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3152 runs only) independently of the message's sender address. This meant
3153 that, if the 4xx error was in fact related to the sender, a different
3154 message to the same recipient with a different sender could confuse
3155 things. In particular, this can happen when sending to a greylisting
3156 server, but other circumstances could also provoke similar problems.
3157 I have changed the default so that the retry time for these errors is now
3158 based a combination of the sender and recipient addresses. This change
3159 can be overridden by setting address_retry_include_sender=false in the
3162 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3163 remote server are returned as part of bounce messages. This was not
3164 happening for LMTP over a pipe (the lmtp transport), but now it is the
3165 same for both kinds of LMTP.
3167 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3168 in header lines that were in fact CNAMEs. This is no longer the case.
3170 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3171 and queue runs started by the daemon processed all messages. This has
3172 been fixed so that -R and -S can now usefully be given with -q<time>.
3174 PH/40 Import PCRE release 6.7 (fixes some bugs).
3176 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3178 PH/42 Give an error if -q is specified more than once.
3180 PH/43 Renamed the variables $interface_address and $interface_port as
3181 $received_ip_address and $received_port, to make it clear that these
3182 values apply to message reception, and not to the outgoing interface when
3183 a message is delivered. (The old names remain recognized, of course.)
3185 PH/44 There was no timeout on the connect() call when using a Unix domain
3186 socket in the ${readsocket expansion. There now is.
3188 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3189 be meaningful with "accept".
3191 SC/01 Eximstats V1.43
3192 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3194 SC/02 Eximstats V1.44
3195 Use a glob alias rather than an array ref in the generated
3196 parser. This improves both readability and performance.
3198 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3199 Collect SpamAssassin and rejection statistics.
3200 Don't display local sender or destination tables unless
3201 there is data to show.
3202 Added average volumes into the top table text output.
3204 SC/04 Eximstats V1.46
3205 Collect data on the number of addresses (recipients)
3206 as well as the number of messages.
3208 SC/05 Eximstats V1.47
3209 Added 'Message too big' to the list of mail rejection
3210 reasons (thanks to Marco Gaiarin).
3212 SC/06 Eximstats V1.48
3213 Mainlog lines which have GMT offsets and are too short to
3214 have a flag are now skipped.
3216 SC/07 Eximstats V1.49 (Alain Williams)
3217 Added the -emptyok flag.
3219 SC/08 Eximstats V1.50
3220 Fixes for obtaining the IP address from reject messages.
3222 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3223 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3224 whitespace changes from 4.64-PH/27
3226 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3229 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3230 are found, allow negative numbers in numeric criteria)
3232 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3234 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3235 to match changes made in 4.64-PH/43
3237 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3239 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3240 "domain" is actually an IP address, and force a failure. This locks out
3241 those revolvers/nameservers that support "A-for-A" lookups, in
3242 contravention of the specifications.
3244 PH/48 When a host name was looked up from an IP address, and the subsequent
3245 forward lookup of the name timed out, the host name was left in
3246 $sender_host_name, contrary to the specification.
3248 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3249 restricted to single-key lookups, Exim was not diagnosing an error if
3250 * or *@ was used with a query-style lookup.
3252 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3254 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3255 long ago, but noone interested enough thought of it. Let's just say that
3256 the "1.1" means that there are some new functions that weren't there at
3257 some point in the past.
3259 PH/51 Error processing for expansion failure of helo_data from an smtp
3260 transport during callout processing was broken.
3262 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3263 tested/used via the -bh/-bhc/-bs options.
3265 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3266 bug, fixed in subsequent PCRE releases).
3268 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3269 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3271 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3277 SC/01 Use a glob alias rather than an array ref in eximstats generated
3278 parser. This improves both readability and performance.
3280 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3281 Don't display local sender or destination tables in eximstats unless
3282 there is data to show.
3283 Added average volumes into the eximstats top table text output.
3285 SC/03 Collect data on the number of addresses (recipients) as well
3286 as the number of messages in eximstats.
3288 TF/01 Correct an error in the documentation for the redirect router. Exim
3289 does (usually) call initgroups() when daemonizing.
3291 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3292 with consistent privilege compared to when running as a daemon.
3294 TF/03 Note in the spec that $authenticated_id is not set for local
3295 submissions from trusted users.
3297 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3298 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3300 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3301 by adding some example configuration directives to the default
3302 configuration file. A little bit of work is required to uncomment the
3303 directives and define how usernames and passwords are checked, but
3304 there is now a framework to start from.
3306 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3307 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3308 without this. I don't know how relevant this is to other LDAP libraries.
3310 PH/02 Add the verb name to the "unknown ACL verb" error.
3312 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3314 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3316 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3317 directory not expanded when it should be if an expanded home directory
3318 was set for the address (which is overridden by the transport).
3320 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3323 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3324 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3325 because it is too late at that time, and has no effect.
3327 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3328 security issue with \' (bugzilla #107). I could not use the
3329 PQescapeStringConn() function, because it needs a PGconn value as one of
3332 PH/08 When testing addresses using -bt, indicate those final addresses that
3333 are duplicates that would not cause an additional delivery. At least one
3334 person was confused, thinking that -bt output corresponded to deliveries.
3335 (Suppressing duplicates isn't a good idea as you lose the information
3336 about possibly different redirections that led to the duplicates.)
3338 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3339 systems where poll() doesn't work, in particular OS X.
3341 PH/10 Added more information to debugging output for retry time not reached.
3343 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3344 operations in malware.c.
3346 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3349 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3350 syslog_duplication set false, log lines that would normally be written
3351 both the the main log and to the reject log were not written to syslog at
3354 PH/14 In the default configuration, change the use of "message" in ACL warn
3355 statements to "add_header".
3357 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3358 not followed by a command (e.g. "seen endif").
3360 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3361 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3364 PH/17 Added extra conditions to the default value of delay_warning_condition
3368 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3369 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3370 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3373 The Auto-Submitted: and various List- headers are standardised, whereas I
3374 don't think Precedence: ever was.
3376 PH/18 Refactored debugging code in route_finduser() to show more information,
3377 in particular, the error code if getpwnam() issues one.
3379 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3380 This is apparently needed in addition to the PH/07 change above to avoid
3381 any possible encoding problems.
3383 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3384 but not after initializing Perl.
3386 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3387 output them only if debugging. By default they are written stderr,
3388 apparently, which is not desirable.
3390 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3393 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3396 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3398 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3399 authenticated or an ident call has been made. Suppress the default
3400 values for $authenticated_id and $authenticated_sender (but permit -oMai
3401 and -oMas) when testing with -bh.
3403 PH/24 Re-jigged the order of the tests in the default configuration so that the
3404 tests for valid domains and recipients precede the DNS black list and CSA
3405 tests, on the grounds that those ones are more expensive.
3407 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3408 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3409 This bug exists in every version of Exim that I still have, right back to
3412 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3413 However, an attempt to turn on case-sensitivity in a regex key by
3414 including (?-i) didn't work because the subject string was already
3415 lowercased, and the effects were non-intuitive. It turns out that a
3416 one-line patch can be used to allow (?-i) to work as expected.
3422 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3423 other effects) broke the use of negated acl sub-conditions.
3425 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3428 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3429 "Deny" causes Exim to reject the incoming connection with a 554 error.
3430 Unfortunately, if there is a major crisis, such as a disk failure,
3431 tcp-wrappers gives "deny", whereas what one would like would be some
3432 kind of temporary error. A kludge has been added to help with this.
3433 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3434 554 error is used if errno is still zero or contains ENOENT (which occurs
3435 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3438 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3440 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3441 errors. Otherwise a message that provokes a temporary error (when other
3442 messages do not) can cause a whole host to time out.
3444 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3445 addresses were routed directly to files or pipes from a redirect router.
3446 File deliveries just didn't batch; pipe deliveries might have suffered
3449 PH/06 A failure to get a lock for a hints database would erroneously always say
3450 "Failed to get write lock", even when it was really a read lock.
3452 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3453 of 0600. This has been changed to use the value of the lockfile_mode
3454 option (which defaults to 0600).
3456 PH/08 Applied small patch from the Sieve maintainer.
3458 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3459 folder from quota calculations, a direct delivery into this folder messed
3460 up the contents of the maildirsize file. This was because the regex was
3461 used only to exclude .Trash (or whatever) when the size of the mailbox
3462 was calculated. There was no check that a delivery was happening into an
3463 excluded directory. This bug has been fixed by ignoring all quota
3464 processing for deliveries into excluded directories.
3466 PH/10 Added the maildirfolder_create_regex option to appendfile.
3472 PH/01 The code for finding all the local interface addresses on a FreeBSD
3473 system running IPv6 was broken. This may well have applied to all BSD
3474 systems, as well as to others that have similar system calls. The broken
3475 code found IPv4 interfaces correctly, but gave incorrect values for the
3476 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3477 that it would not match correctly against @[] and not recognize the IPv6
3480 PH/02 The ipliteral router was not recognizing addresses of the form user@
3481 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3483 PH/03 Added disable_ipv6.
3485 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3486 decoded form, because it is most often used to construct To: headers
3487 lines in autoreplies, and the decoded form may well be syntactically
3488 invalid. However, $reply_address has leading white space removed, and all
3489 newlines turned into spaces so that the autoreply transport does not
3492 PH/05 If group was specified without a user on a router, and no group or user
3493 was specified on a transport, the group from the router was ignored.
3495 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3496 for visible compile-time settings that can be used to change these
3497 numbers, for those that want even more. Backwards compatibility with old
3498 spool files has been maintained. However, going back to a previous Exim
3499 release will lost any variables that are in spool files.
3501 PH/07 Two small changes when running in the test harness: increase delay when
3502 passing a TCP/IP connection to a new process, in case the original
3503 process has to generate a bounce, and remove special handling of
3504 127.0.0.2 (sic), which is no longer necessary.
3506 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3507 be the same on different OS.
3509 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3512 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3513 whether --show-vars was specified or not
3515 JJ/02 exipick: Added support for new ACL variable spool format introduced
3518 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3519 syntactically invalid From: or Reply-to: line, and a filter used this to
3520 generate an autoreply, and therefore failed to obtain an address for the
3521 autoreply, Exim could try to deliver to a non-existent relative file
3522 name, causing unrelated and misleading errors. What now happens is that
3523 it logs this as a hard delivery error, but does not attempt to create a
3526 PH/11 The exinext utility has a -C option for testing purposes, but although
3527 the given file was scanned by exinext itself; it wasn't being passed on
3528 when Exim was called.
3530 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3531 an end-of-file indication when reading a command response.
3533 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3534 compiled. In many other places in Exim, IPv6 addresses are always
3535 recognized, so I have changed this. It also means that IPv4 domain
3536 literals of the form [IPV4:n.n.n.n] are now always recognized.
3538 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3539 used if the router is not running as root, for example, when verifying at
3540 ACL time, or when using -bh. The debugging output from this situation was
3541 non-existent - all you got was a failure to exec. I have made two
3544 (a) Failures to set uid/gid, the current directory, or a process leader
3545 in a subprocess such as that created by queryprogram now generate
3546 suitable debugging output when -d is set.
3548 (b) The queryprogram router detects when it is not running as root,
3549 outputs suitable debugging information if -d is set, and then runs
3550 the subprocess without attempting to change uid/gid.
3552 PH/15 Minor change to Makefile for building test_host (undocumented testing
3555 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3556 additional section of a DNS packet that returns MX or SRV records.
3557 Instead, it always explicitly searches for A/AAAA records. This avoids
3558 major problems that occur when a DNS server includes only records of one
3559 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3560 fixed another bug: if SRV records were looked up and the corresponding
3561 address records were *not* found in the additional section, the port
3562 values from the SRV records were lost.
3564 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3565 using the correct key (the original address) when searching the retry
3566 rules in order to find which one to use for generating the retry hint.
3568 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3569 adding the default one. Similarly, if it contains a Reply-To: header, the
3570 errors_reply_to option, if set, is not used.
3572 PH/19 When calculating a retry time, Exim used to measure the "time since
3573 failure" by looking at the "first failed" field in the retry record. Now
3574 it does not use this if it is later than than the arrival time of the
3575 message. Instead it uses the arrival time. This makes for better
3576 behaviour in cases where some deliveries succeed, thus re-setting the
3577 "first failed" field. An example is a quota failure for a huge message
3578 when small messages continue to be delivered. Without this change, the
3579 "time since failure" will always be short, possible causing more frequent
3580 delivery attempts for the huge message than are intended.
3581 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3583 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3584 $1, $2, $3) because the numerical variables can be reset during some
3585 expansion items (e.g. "match"), thereby losing the authentication data.
3587 PH/21 Make -bV show the size of off_t variables so that the test suite can
3588 decide whether to run tests for quotas > 2G.
3590 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3591 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3592 filecount value is greater than 2G or if a quota value is greater than 2G
3593 on a system where the size of off_t is not greater than 4, a panic error
3596 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3597 never match. The debug and -bh output now contains an explicit error
3598 message indicating a malformed IPv4 address or mask.
3600 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3601 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3602 PH/23 above applies.
3604 PH/25 Do not write to syslog when running in the test harness. The only
3605 occasion when this arises is a failure to open the main or panic logs
3606 (for which there is an explicit test).
3608 PH/26 Added the /no_tell option to "control=freeze".
3610 PH/27 If a host name lookup failed very early in a connection, for example, if
3611 the IP address matched host_lookup and the reverse lookup yielded a name
3612 that did not have a forward lookup, an error message of the form "no IP
3613 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3614 could be logged. Now it outputs the IP address instead of "NULL".
3616 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3617 allows the sender and the authenticated sender to be set when
3618 submitting a message from within Exim. Since child_open_exim() is
3619 documented for local_scan(), the new function should be too.
3621 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3622 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3623 results in an empty string is now treated as unset.
3625 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3627 PH/31 Added sender_verify_fail logging option.
3629 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3630 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3631 tidied the source and removed it altogether.
3633 PH/33 When a queue run was abandoned because the load average was too high, a
3634 log line was always written; now it is written only if the queue_run log
3635 selector is set. In addition, the log line for abandonment now contains
3636 information about the queue run such as the pid. This is always present
3637 in "start" and "stop" lines but was omitted from the "abandon" line.
3639 PH/34 Omit spaces between a header name and the colon in the error message that
3640 is given when verify = headers_syntax fails (if there are lots of them,
3641 the message gets confusing).
3643 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3644 names, as there are now some PTR records that contain slashes. This check
3645 is only to protect against broken name servers that fall over on strange
3646 characters, so the fact that it applies to all lookups doesn't matter.
3648 PH/36 Now that the new test suite is complete, we can remove some of the
3649 special code in Exim that was needed for the old test suite. For example,
3650 sorting DNS records because real resolvers return them in an arbitrary
3651 order. The new test suite's fake resolver always returns records in the
3654 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3655 bounces) except when queue_only is set, to avoid logging races between
3656 the different processes.
3658 PH/38 Panic-die if .include specifies a non-absolute path.
3660 PH/39 A tweak to the "H" retry rule from its user.
3662 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3663 a label. They prevented compilation on older perls.
3665 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3666 a warning to be raised on newish perls.
3668 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3669 on queue. Changes to match documented behaviour of showing count of
3670 messages matching specified criteria.
3672 PH/40 Changed the default ident timeout from 30s to 5s.
3674 PH/41 Added support for the use of login_cap features, on those BSD systems
3675 that have them, for controlling the resources used by pipe deliveries.
3677 PH/42 The content-scanning code uses fopen() to create files in which to put
3678 message data. Previously it was not paying any attention to the mode of
3679 the files. Exim runs with umask(0) because the rest of the code creates
3680 files with open(), and sets the required mode explicitly. Thus, these
3681 files were ending up world-writeable. This was not a big issue, because,
3682 being within the spool directory, they were not world-accessible. I have
3683 created a function called modefopen, which takes an additional mode
3684 argument. It sets umask(777), creates the file, chmods it to the required
3685 mode, then resets the umask. All the relevant calls to fopen() in the
3686 content scanning code have been changed to use this function.
3688 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3689 to 24 hours. This avoids potential overflow problems when processing G
3690 and H retry rules. I suspect nobody ever tinkers with this value.
3692 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3694 PH/45 When the plaintext authenticator is running as a client, the server's
3695 challenges are checked to ensure they are valid base64 strings. By
3696 default, the authentication attempt is cancelled if an invalid string is
3697 received. Setting client_ignore_invalid_base64 true ignores these errors.
3698 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3699 they are received. Thus, the responses can be made to depend on the
3700 challenges. If an invalid string is ignored, an empty string is placed in
3703 PH/46 Messages that are created by the autoreply transport now contains a
3704 References: header, in accordance with RFCs 2822 and 3834.
3706 PH/47 Added authenticated_sender_force to the smtp transport.
3708 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3710 PH/49 Installed latest patch from the Sieve maintainer.
3712 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3713 was also set, the appendfile transport was unnecessarily scanning a
3714 directory of message files (e.g. for maildir delivery) to find the count
3715 of files (along with the size), even though it did not need this
3716 information. It now does the scan only if it needs to find either the
3717 size of the count of files.
3719 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3721 PH/52 Two bugs concerned with error handling when the smtp transport is
3724 (i) Exim was not creating retry information for temporary errors given
3725 for individual recipients after the DATA command when the smtp transport
3726 was used in LMTP mode. This meant that they could be retried too
3727 frequently, and not timed out correctly.
3729 (ii) Exim was setting the flag that allows error details to be returned
3730 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3731 recipients that were returned after the DATA command.
3733 PH/53 This is related to PH/52, but is more general: for any failing address,
3734 when detailed error information was permitted to be returned to the
3735 sender, but the error was temporary, then after the final timeout, only
3736 "retry timeout exceeded" was returned. Now it returns the full error as
3737 well as "retry timeout exceeded".
3739 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3740 do this, and (what is worse) MTAs that accept it.
3742 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3743 will now be deprecated.
3745 PH/56 New os.c-cygwin from the Cygwin maintainer.
3747 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3748 formats (previously only available in exim formats via -bpr, -bpru,
3749 and -bpra. Now also available in native and exiqgrep formats)
3751 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3752 with very large, slow to parse queues
3754 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3756 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3758 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3759 responses to authentication challenges, though it was showing the
3760 challenges; (ii) I've removed the CR characters from the debug output for
3763 PH/58 Allow for the insertion of a newline as well as a space when a string
3764 is turned into more than one encoded-word during RFC 2047 encoding. The
3765 Sieve code now uses this.
3767 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3768 data_4xx, lost_connection, tls_required.
3770 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3771 message was being sent as an SMTP response.
3773 PH/61 Add -l and -k options to exicyclog.
3775 PH/62 When verifying, if an address was redirected to one new address, so that
3776 verification continued, and the new address failed or deferred after
3777 having set something in $address_data, the value of $address_data was not
3778 passed back to the ACL. This was different to the case when no
3779 redirection occurred. The value is now passed back in both cases.
3781 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3782 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3783 use login_cap.h, so on its own it isn't the distinguishing feature. The
3784 new name refers directly to the setclassresources() function.
3786 PH/65 Added configuration files for NetBSD3.
3788 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3790 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3791 is preferred over IPv4.
3793 PH/68 The bounce_return_message and bounce_return_body options were not being
3794 honoured for bounces generated during the reception of non-SMTP messages.
3795 In particular, this applied to messages rejected by the ACL. This bug has
3796 been fixed. However, if bounce_return_message is true and bounce_return_
3797 body is false, the headers that are returned for a non-SMTP message
3798 include only those that have been read before the error was detected.
3799 (In the case of an ACL rejection, they have all been read.)
3801 PH/69 The HTML version of the specification is now built in a directory called
3802 spec_html instead of spec.html, because the latter looks like a path with
3803 a MIME-type, and this confuses some software.
3805 PH/70 Catch two compiler warnings in sieve.c.
3807 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3808 function verify_get_ident() calls ip_connect() to connect a socket, but
3809 if the "connect()" function timed out, ip_connect() used to close the
3810 socket. However, verify_get_ident() also closes the socket later, and in
3811 between Exim writes to the log, which may get opened at this point. When
3812 the socket was closed in ip_connect(), the log could get the same file
3813 descriptor number as the socket. This naturally causes chaos. The fix is
3814 not to close the socket in ip_connect(); the socket should be closed by
3815 the function that creates it. There was only one place in the code where
3816 this was missing, in the iplookup router, which I don't think anybody now
3817 uses, but I've fixed it anyway.
3819 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3820 well as to direct DNS lookups. Otherwise the handling of names in host
3821 lists is inconsistent and therefore confusing.
3827 PH/01 Two changes to the default runtime configuration:
3829 (1) Move the checks for relay_from_hosts and authenticated clients from
3830 after to before the (commented out) DNS black list checks.
3832 (2) Add control=submission to the relay_from_hosts and authenticated
3833 clients checks, on the grounds that messages accepted by these
3834 statements are most likely to be submissions.
3836 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3838 (1) Generate an error if the third argument for the ${prvs expansion is
3841 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3844 (3) Reset the variables that are obtained from the first argument of
3845 ${prvscheck and used in the second argument before leaving the code,
3846 because their memory is reclaimed, so using them afterwards may do
3849 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3850 one (it's much easier than Tom thought :-).
3852 (5) Because of (4), we can now allow for the use of $prvscheck_result
3853 inside the third argument.
3855 PH/03 For some reason, the default setting of PATH when running a command from
3856 a pipe transport was just "/usr/bin". I have changed it to
3859 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3860 anything to be listed in the output from -bV.
3862 PH/05 When a filter generated an autoreply, the entire To: header line was
3863 quoted in the delivery log line, like this:
3865 => >A.N.Other <ano@some.domain> <original@ddress> ...
3867 This has been changed so that it extracts the operative address. There
3868 may be more than one such address. If so, they are comma-separated, like
3871 => >ano@some.domain,ona@other.domain <original@ddress> ...
3873 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3874 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3875 not being looked up in the rDNS to get a host name, Exim was showing the
3876 IP address twice in Received: lines, even though the IP addresses were
3877 identical. For example:
3879 Received: from [1.2.3.4] (helo=[1.2.3.4])
3881 However, if the real host name was known, it was omitting the HELO data
3882 if it matched the actual IP address. This has been tidied up so that it
3883 doesn't show the same IP address twice.
3885 PH/07 When both +timestamp and +memory debugging was on, the value given by
3886 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3887 called by the debug printing, thereby overwriting the timestamp buffer.
3888 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3890 PH/08 When the original message was included in an autoreply transport, it
3891 always said "this is a copy of the message, including all the headers",
3892 even if body_only or headers_only was set. It now gives an appropriate
3895 PH/09 Applied a patch from the Sieve maintainer which:
3897 o fixes some comments
3898 o adds the (disabled) notify extension core
3899 o adds some debug output for the result of if/elsif tests
3900 o points to the current vacation draft in the documentation
3901 and documents the missing references header update
3905 o fixes a bug in processing the envelope test (when testing
3906 multiple envelope elements, the last element determined the
3909 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3910 Electronic Mail") by including:
3912 Auto-submitted: auto-generated
3914 in the messages that it generates (bounce messages and others, such as
3915 warnings). In the case of bounce messages for non-SMTP messages, there was
3916 also a typo: it was using "Auto_submitted" (underscore instead of
3917 hyphen). Since every message generated by Exim is necessarily in response
3918 to another message, thes have all been changed to:
3920 Auto-Submitted: auto-replied
3922 in accordance with these statements in the RFC:
3924 The auto-replied keyword:
3926 - SHOULD be used on messages sent in direct response to another
3927 message by an automatic process,
3929 - MUST NOT be used on manually-generated messages,
3931 - MAY be used on Delivery Status Notifications (DSNs) and Message
3932 Disposition Notifications (MDNs),
3934 - MUST NOT be used on messages generated by automatic or periodic
3935 processes, except for messages which are automatic responses to
3938 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3939 to the default Received: header definition.
3941 PH/12 Added log selector acl_warn_skipped (default on).
3943 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3944 variables because (a) they are in the wrong storage pool and (b) even if
3945 they were copied, it wouldn't work properly because of the caching.
3947 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3948 checking when decoding. Apparently there are clients that generate
3949 overlong encoded strings. Why am I not surprised?
3951 PH/15 If the first argument of "${if match_address" was not empty, but did not
3952 contain an "@" character, Exim crashed. Now it writes a panic log message
3953 and treats the condition as false.
3955 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3957 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3958 extension "envelope-auth". The code is finished and in agreement with
3959 other implementations, but there is no documentation so far and in fact,
3960 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3961 not changing the active code.
3963 Print executed "if" and "elsif" statements when debugging is used. This
3964 helps a great deal to understand what a filter does.
3966 Document more things not specified clearly in RFC3028. I had all this
3967 sorted out, when out of a sudden new issues came to my mind. Oops."
3969 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3972 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3973 canonical form (as documented). However, after a host name lookup from
3974 the IP address, check_host() was doing a simple string comparison with
3975 addresses acquired from the DNS when checking that the found name did
3976 have the original IP as one of its addresses. Since any found IPv6
3977 addresses are likely to be in abbreviated form, the comparison could
3978 fail. Luckily, there already exists a function for doing the comparison
3979 by converting both addresses to binary, so now that is used instead of
3980 the text comparison.
3982 PH/20 There was another similar case to PH/19, when a complete host name was
3983 given in a host list; looking up its IP address could give an abbreviated
3984 form, whereas the current host's name might or might not be abbreviated.
3985 The same fix has been applied.
3991 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3992 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3995 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3996 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3998 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4000 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4001 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4002 Also, for "Auto-Submitted", treat anything other than "no" as
4003 non-personal, in accordance with RFC 3834. (Previously it treated
4004 anything starting "auto-" as non-personal.)
4006 TF/01 The control=submission/name=... option had a problem with syntax
4007 errors if the name included a slash character. The /name= option
4008 now slurps the rest of the string, so it can include any characters
4009 but it must come last in the list of options (after /sender_retain
4012 PH/05 Some modifications to the interface to the fake nameserver for the new
4020 TK/01 Added the "success_on_redirect" address verification option. See
4021 NewStuff for rationale and an example.
4023 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4025 PH/02 Patch to exigrep to allow it to work on syslog lines.
4027 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4028 fread() to skip over the body file's header line, because in Cygwin the
4029 header line is locked and is inaccessible.
4031 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4032 co-exist for some time) to make it clear that it is the Exim ID that is
4033 referenced, not the Message-ID: header line.
4035 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4036 string_format() function, because snprintf() does not exist on all
4039 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4040 ${stat: expansion item.
4042 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4043 protocol synchronization error", to keep the pedants happy.
4045 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4046 well as for IRIX systems, when gcc is being used. See the host.c source
4049 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4051 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4054 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4055 transport and to the smtp transport in LMTP mode.
4057 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4059 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4060 run a filter in a subprocess. This could lead to confusion in subsequent
4061 lookups in the parent process. There should also be a search_tidyup() at
4062 the end of the subprocess.
4064 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4065 only if the host matched helo_try_verify_hosts, which caused the
4066 verification to occur when the EHLO/HELO command was issued. The ACL just
4067 tested the remembered result. Now, if a previous verification attempt has
4068 not happened, "verify = helo" does it there and then.
4070 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4072 TK/03 Fix log output including CR from clamd.
4074 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4075 exist provoked a memory error which could cause a segfault.
4077 PH/15 Installed PCRE 6.2
4079 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4081 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4082 of the problem. Specifically, suggested +O2 rather than +O1 for the
4085 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4087 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4088 record, the port was not correctly logged when the outgoing_port log
4089 selector was set (it logged the transort's default port).
4091 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4092 fallback_hosts, and "hosts" in the smtp transport.
4094 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4095 host errors such as "Connection refused".
4097 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4098 authentication with radiusclient 0.4.9:
4100 - Error returned from rc_read_config was caught wrongly
4101 - Username/password not passed on to radius server due to wrong length.
4103 The presumption is that some radiusclient API changes for 4.51/PH/17
4104 were not taken care of correctly. The code is still untested by me (my
4105 Linux distribution still has 0.3.2 of radiusclient), but it was
4106 contributed by a Radius user.
4108 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4109 expanding the "port" option of the smtp transport.
4111 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4112 while reading a MIME header. Thanks to Tom Hughes for a patch.
4114 PH/24 Include config.h inside local_scan.h so that configuration settings are
4117 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4118 that in an ACL for RCPT (for example), you can examine exactly what was
4121 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4122 commands, but it was not correctly comparing the address with the actual
4123 client host address. Thus, it would show the EHLO address in Received:
4124 header lines when this was not necessary.
4126 PH/27 Added the % operator to ${eval:}.
4128 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4129 it should be ignoring failures (because with -C, for example, it has lost
4130 privilege). It wasn't ignoring creation failures other than "already
4133 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4136 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4137 because an input line was too long, either on its own, or by virtue of
4138 too many continuations, the temporary file was not being removed, and the
4139 return code was incorrect.
4141 PH/31 Missing "BOOL" in function definition in filtertest.c.
4143 PH/32 Applied Sieve patches from the maintainer.
4145 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4147 PH/33 Added "verify = not_blind".
4149 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4150 Local/Makefile (with some defaults set). These are used in built scripts
4151 such as exicyclog, but they have never been used in the exim_install
4152 script (though there are many overriding facilities there). I have
4153 arranged that the exim_install script now takes note of these two
4156 PH/35 Installed configuration files for Dragonfly.
4158 PH/36 When a locally submitted message by a trusted user did not contain a
4159 From: header, and the sender address was obtained from -f or from an SMTP
4160 MAIL command, and the trusted user did not use -F to supply a sender
4161 name, $originator_name was incorrectly used when constructing a From:
4162 header. Furthermore, $originator_name was used for submission mode
4163 messages from external hosts without From: headers in a similar way,
4164 which is clearly wrong.
4166 PH/37 Added control=suppress_local_fixups.
4168 PH/38 When log_selector = +received_sender was set, and the addition of the
4169 sender made the log line's construction buffer exactly full, or one byte
4170 less than full, an overflow happened when the terminating "\n" was
4173 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4174 when the result of a list match is failure because a DNS lookup failed.
4176 PH/40 RM_COMMAND is now used in the building process.
4178 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4179 the "build-* directories that it finds.
4181 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4182 address in a domain literal was a prefix of an interface address.
4184 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4185 when verifying a sender address, unless rewrite_headers is false.
4187 PH/44 Wrote a long comment about why errors_to addresses are verified as
4188 recipients, not senders.
4190 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4191 the ratelimit ACL was added.
4193 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4195 PH/46 Added extra information about PostgreSQL errors to the error string.
4197 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4198 avoiding the need to install special zones in a real server. This is
4199 backwards compatible; if it can't find the fake resolver, it drops back.
4200 Thus, both old and new test suites can be run.
4202 TF/02 Added util/ratelimit.pl
4204 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4205 clock is set back in time.
4207 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4208 Candler <B.Candler@pobox.com>.
4210 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4211 OK for addresses that are the result of redirections.
4213 PH/48 A number of further additions for the benefit of the new test suite,
4214 including a fake gethostbyname() that interfaces to the fake DNS resolver
4217 TF/06 The fix for widen_domains has also been applied to qualify_single and
4218 search_parents which are the other dnslookup options that can cause
4221 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4224 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4226 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4227 service" if it encountered an MX record with an empty target hostname.
4228 The message is now "an MX or SRV record indicated no SMTP service".
4230 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4231 if the DNS of the sending site is misconfigured. This is quite a
4232 common situation. This change restores the behaviour of treating a
4233 helo verification defer as a failure.
4235 PH/51 If self=fail was set on a router, the bounce message did not include the
4236 actual error message.
4242 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4244 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4245 command itself ended in error, the underlying message about the transport
4246 filter timeout was being overwritten with the pipe command error. Now the
4247 underlying error message should be appended to the second error message.
4249 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4251 PH/02 Reduce the amount of output that "make" produces by default. Full output
4252 can still be requested.
4254 PH/03 The warning log line about a condition test deferring for a "warn" verb
4255 was being output only once per connection, rather than after each
4256 occurrence (because it was using the same function as for successful
4257 "warn" verbs). This seems wrong, so I have changed it.
4259 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4260 it should not have, which might have caused a crash in the right
4261 circumstances, but probably never did.
4263 PH/04 Installed a modified version of Tony Finch's patch to make submission
4264 mode fix the return path as well as the Sender: header line, and to
4265 add a /name= option so that you can make the user's friendly name appear
4268 TF/03 Added the control = fakedefer ACL modifier.
4270 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4271 Mark Lowes for thorough testing.
4273 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4275 TK/03 Merged latest SRS patch from Miles Wilton.
4277 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4278 with the definition in sysexits.h (which is #included earlier).
4279 Fortunately, Exim does not actually use EX_OK. The code used to try to
4280 preserve the sysexits.h value, by assuming that macro definitions were
4281 scanned for macro replacements. I have been disabused of this notion,
4282 so now the code just undefines EX_OK before #including unistd.h.
4284 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4285 in the smtp transport. When a block could not be written in a single
4286 write() function, the timeout was being re-applied to each part-write.
4287 This seems wrong - if the receiver was accepting one byte at a time it
4288 would take for ever. The timeout is now adjusted when this happens. It
4289 doesn't have to be particularly precise.
4291 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4292 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4294 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4295 without a domain if the check to <postmaster@domain> fails.
4297 SC/01 Eximstats: added -xls and the ability to specify output files
4298 (patch written by Frank Heydlauf).
4300 SC/02 Eximstats: use FileHandles for outputting results.
4302 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4304 SC/04 Eximstats: fixed display of large numbers with -nvr option
4306 SC/05 Eximstats: fixed merging of reports with empty tables.
4308 SC/06 Eximstats: added the -include_original_destination flag
4310 SC/07 Eximstats: removed tabs and trailing whitespace.
4312 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4314 TK/06 MBOX spool code: Add real "From " MBOX separator line
4315 so the .eml file is really in mbox format (even though
4316 most programs do not really care). Patch from Alex Miller.
4318 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4319 The latter is generated from $received_to and is only set if the
4320 message has one envelope recipient. SA can use these headers,
4321 obviously out-of-the-box. Patch from Alex Miller.
4323 PH/08 The ${def test on a variable was returning false if the variable's
4324 value was "0", contrary to what the specification has always said!
4325 The result should be true unless the variable is empty.
4327 PH/09 The syntax error of a character other than { following "${if
4328 def:variable_name" (after optional whitespace) was not being diagnosed.
4329 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4330 accidental colon was present, for example, could give incorrect results.
4332 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4333 result is used (not including appendfile, where other changes are about
4336 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4337 This involved changing a lot of size variables from int to off_t. It
4338 should work with maildirs and everything.
4340 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4341 spamd dying while we are connected to it.
4343 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4346 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4347 function for BDB 4.3.
4349 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4351 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4352 the sources for PCRE have been re-arranged and more files are now
4355 PH/15 The code I had for printing potentially long long variables in PH/11
4356 above was not the best (it lost precision). The length of off_t variables
4357 is now inspected at build time, and an appropriate printing format (%ld
4358 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4359 to be "long long int" or "long int". This is needed for the internal
4360 formatting function string_vformat().
4362 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4363 the configuration file to be ":syslog", then the script "guesses" where
4364 the logs files are, rather than using the compiled in default. In our
4365 case the guess is not the same as the compiled default, so the script
4366 suddenly stopped working when I started to use syslog. The patch checks
4367 to see if log_file_path is "". If so, it attempts to read it from exim
4368 with no configuration file to get the compiled in version, before it
4369 falls back to the previous guessing code."
4371 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4372 implementing BATV in an Exim configuration. See NewStuff for the gory
4375 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4376 Makefile that are specific to HP-UX.
4378 PH/18 If the "use_postmaster" option was set for a recipient callout together
4379 with the "random" option, the postmaster address was used as the MAIL
4380 FROM address for the random test, but not for the subsequent recipient
4381 test. It is now used for both.
4383 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4384 patch removes a few documentation additions to RFC 3028, because the
4385 latest draft now contains them. It adds the new en;ascii-case comparator
4386 and a new error check for 8bit text in MIME parts. Comparator and
4387 require names are now matched exactly. I enabled the subaddress
4388 extension, but it is not well tested yet (read: it works for me)."
4390 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4391 rework some of the code of TK/09 above to avoid the hardwired use of
4392 "%lld" and "long long". Replaced the call to snprintf() with a call to
4395 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4396 records point to non-existent hosts", "retry timeout exceeded", and
4397 "retry time not reached for any host after a long failure period".
4399 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4400 experimental DomainKeys support:
4402 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4403 (2) On an error such as an illegally used "control", the wrong name for
4404 the control was given.
4406 These problems did NOT occur unless DomainKeys support was compiled.
4408 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4410 PH/24 Added ${if match_ip condition.
4412 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4413 databases so that it will be absolutely obvious if a crash occurs in the
4414 DB library. This is a regular occurrence (often caused by mis-matched
4417 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4418 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4419 picked up on a user's system that detects such things. There doesn't seem
4420 to be a gcc warning option for this - only an attribute that has to be
4421 put on the function's prototype. It seems that in Fedora Core 4 they have
4422 set this on a number of new functions. No doubt there will be more in due
4425 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4426 specify a transport. However, if an address that was verified by such a
4427 router was the subject of a callout, Exim crashed because it tried to
4428 read the rcpt_include_affixes from the non-existent transport. Now it
4429 just assumes that the setting of that option is false. This bug was
4430 introduced by 4.51/PH/31.
4432 PH/28 Changed -d+all to exclude +memory, because that information is very
4433 rarely of interest, but it makes the output a lot bigger. People tend to
4434 do -d+all out of habit.
4436 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4437 code in os-type was giving problems when libc.so lives in lib64, like on
4440 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4441 aren't the modern standard, and it seems that some systems' include files
4442 don't always have them. Exim was already checking for some of the newer
4443 ones like T_AAAA, and defining it itself. I've added checks for all the
4444 record types that Exim uses.
4446 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4447 not automatically generating a new one, as it is supposed to. This
4448 prevented TLS from working. If the file did exist, but contained invalid
4449 data, a new version was generated, as expected. It was only the case of a
4450 non-existent file that was broken.
4452 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4453 with a change in libdomainkeys > 0.64.
4455 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4456 from DNS. If the selector record carries the flag, it now has
4457 precedence over the domain-wide flag.
4459 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4461 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4462 the use of a port name that isn't defined in /etc/services) occurred, the
4463 message was deferred as in a normal delivery, and thus remained on the
4464 spool, instead of being failed because of the mua_wrapper setting. This
4465 is now fixed, and I tidied up some of the mua_wrapper messages at the
4468 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4469 the messages in a hash of arrays rather than using individual hashes.
4470 This is a bit cleaner and results in dramatic memory savings, albeit
4471 at a slight CPU cost.
4473 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4474 as requested by Marc Sherman.
4476 SC/10 Eximstats: added histograms for user specified patterns as requested
4479 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4481 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4482 fopen() in the content-scanning modules that did not already have it.
4488 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4489 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4491 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4493 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4495 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4496 to test Sieve filters that use "vacation".
4498 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4499 that changes the way the GnuTLS parameters are stored in the cache file.
4500 The new format can be generated externally. For backward compatibility,
4501 if the data in the cache doesn't make sense, Exim assumes it has read an
4502 old-format file, and it generates new data and writes a new file. This
4503 means that you can't go back to an older release without removing the
4506 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4507 work if there are any delivery delays because "one_time" forces the
4508 parent to be marked "delivered", so its unseen clone is never tried
4509 again. For this reason, Exim now forbids the simultaneous setting of
4512 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4513 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4514 entry if you want to know the details. The fix, however, neglected to
4515 consider the case when local delivery batching is involved. The test for
4516 "previously delivered" was not happening when checking to see if an
4517 address could be batched with a previous (undelivered) one; under
4518 certain circumstances this could lead to multiple deliveries to the same
4521 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4522 in its include files, and this causes problems building Exim.
4524 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4525 header_syntax) but Exim was just ignoring anything given after a slash.
4526 In particular, this caused confusion with an attempt to use "verify =
4527 reverse_host_lookup/defer_ok". An error is now given when options are
4528 supplied for verify items that do not have them. (Maybe reverse_host_
4529 lookup should have a defer_ok option, but that's a different point.)
4531 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4532 defined by RFC 821) to 2048, because there were problems with some AUTH
4533 commands, and RFC 1869 says the size should be increased for extended
4534 SMTP commands that take arguments.
4536 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4539 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4540 "unknown" error; now it says that the functionality isn't in the binary.
4542 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4543 an address' error message when a string expansion fails (syntax or
4544 whatever). Otherwise the password may appear in the log. Following change
4545 PH/42 below, there is no longer a chance of it appearing in a bounce
4548 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4550 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4551 of its addresses was ever tried. (Bugzilla bug #2.)
4553 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4554 the result incorrectly in the debug output. (It correctly added a newline
4555 to what was transported.)
4557 TF/01 Added $received_time.
4559 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4560 commented out examples of how to interface to a virus scanner and to
4561 SpamAssassin. Also added commented examples of av_scanner and
4562 spamd_address settings.
4564 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4565 and controls are allowed in which ACLs. There were a couple of minor
4566 errors. Some of the entries in the conditions table (which is a table of
4567 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4568 negation of where the condition IS allowed.
4570 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4572 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4573 header file does not have a version number, so I've had to invent a new
4574 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4575 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4576 radiusclient), but it was contributed by a Radius user.
4578 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4579 files or directories, for OpenSSL.
4581 PH/19 When an Exim process that is running as root has to create an Exim log
4582 file, it does so in a subprocess that runs as exim:exim so as to get the
4583 ownership right at creation (otherwise, other Exim processes might see
4584 the file with the wrong ownership). There was no test for failure of this
4585 fork() call, which would lead to the process getting stuck as it waited
4586 for a non-existent subprocess. Forks do occasionally fail when resources
4587 run out. I reviewed all the other calls to fork(); they all seem to check
4590 PH/20 When checking for unexpected SMTP input at connect time (before writing
4591 the banner), Exim was not dealing correctly with a non-positive return
4592 from the read() function. If the client had disconnected by this time,
4593 the result was a log entry for a synchronization error with an empty
4594 string after "input=" when read() returned zero. If read() returned -1
4595 (an event I could not check), uninitialized data bytes were printed.
4596 There were reports of junk text (parts of files, etc) appearing after
4599 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4601 PH/22 Added support for macro redefinition, and (re)definition in between
4602 driver and ACL definitions.
4604 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4605 forgetting to use the resulting value; it was using the unexpanded value.
4607 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4608 hadn't been configured. The fix is from Juergen Kreileder, who
4609 understands it better than I do:
4611 "Here's what I see happening with three configured cyrus_sasl
4612 authenticators configured (plain, login, cram-md5):
4614 On startup auth_cyrus_sasl_init() gets called for each of these.
4615 This means three calls to sasl_listmech() without a specified mech_list.
4616 => SASL tests which mechs of all available mechs actually work
4617 => three warnings about OTP not working
4618 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4620 With the patch, sasl_listmech() also gets called three times. But now
4621 SASL's mech_list option is set to the server_mech specified in the the
4622 authenticator. Or in other words, the answer from sasl_listmech()
4623 gets limited to just the mech you're testing for (which is different
4625 => the return list contains just 'plain' or 'login', 'cram-md5' or
4626 nothing depending on the value of ob->server_mech.
4628 I've just tested the patch: Authentication still works fine,
4629 unavailable mechs specified in the exim configuration are still
4630 caught, and the auth.log warnings about OTP are gone."
4632 PH/25 When debugging is enabled, the contents of the command line are added
4633 to the debugging output, even when log_selector=+arguments is not
4636 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4637 answer is "GNU", and only if the return is "GNU/something" is the answer
4640 PH/27 $acl_verify_message is now set immediately after the failure of a
4641 verification in an ACL, and so is available in subsequent modifiers. In
4642 particular, the message can be preserved by coding like this:
4644 warn !verify = sender
4645 set acl_m0 = $acl_verify_message
4647 Previously, $acl_verify_message was set only while expanding "message"
4648 and "log_message" when a very denied access.
4650 PH/28 Modified OS/os.c-Linux with
4652 -#ifndef OS_LOAD_AVERAGE
4653 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4655 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4656 nomenclature these days.)
4658 PH/29 Installed patch from the Sieve maintainer that adds the options
4659 sieve_useraddress and sieve_subaddress to the redirect router.
4661 PH/30 In these circumstances:
4662 . Two addresses routed to the same list of hosts;
4663 . First host does not offer TLS;
4664 . First host accepts first address;
4665 . First host gives temporary error to second address;
4666 . Second host offers TLS and a TLS session is established;
4667 . Second host accepts second address.
4668 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4669 and peerdn, if requested) that were in fact used only for the second
4672 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4673 attention to any local part prefix or suffix that was matched by the
4674 router that accepted the address. It now behaves in the same way as it
4675 does for delivery: the affixes are removed from the local part unless
4676 rcpt_include_affixes is set on the transport.
4678 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4679 timeout during the DATA phase of an incoming message.
4681 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4682 applied a patch sanctioned by the Sieve maintainer.
4684 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4685 the uid or gid is negative. A case of a negative gid caused this to be
4686 noticed. The fix allows for either to be negative.
4688 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4689 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4692 PH/36 The change PH/12 above was broken. Fixed it.
4694 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4695 the grounds that routing the same address twice would always produce the
4696 same answer. This might have been true once, but it is certainly no
4697 longer true now. Routing a child address may depend on the previous
4698 routing that produced that child. Some complicated redirection strategies
4699 went wrong when messages had multiple recipients, and made Exim's
4700 behaviour dependent on the order in which the addresses were given.
4702 I have moved the duplicate checking until after the routing is complete.
4703 Exim scans the addresses that are assigned to local and remote
4704 transports, and removes any duplicates. This means that more work will be
4705 done, as duplicates will always all be routed, but duplicates are
4706 presumably rare, so I don't expect this is of any significance.
4708 For deliveries to pipes, files, and autoreplies, the duplicate checking
4709 still happens during the routing process, since they are not going to be
4712 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4713 It corrects a timeout issue with spamd. This is Ian's comment: "The
4714 background is that sometimes spamd either never reads data from a
4715 connection it has accepted, or it never writes response data. The exiscan
4716 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4717 blindly assumes that writes won't block so it may never time out."
4719 PH/39 Allow G after quota size as well as K and M.
4721 PH/40 The value set for $authenticated_id in an authenticator may not contain
4722 binary zeroes or newlines because the value is written to log lines and
4723 to spool files. There was no check on this. Now the value is run through
4724 the string_printing() function so that such characters are converted to
4725 printable escape sequences.
4727 PH/41 $message_linecount is a new variable that contains the total number of
4728 lines in the message. Compare $body_linecount, which is the count for the
4731 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4732 bounce and delay warning messages, except in certain special cases, which
4735 (a) An SMTP error message from a remote host;
4736 (b) A message specified in a :fail: redirection;
4737 (c) A message specified in a "fail" command in a system filter;
4738 (d) A message specified in a FAIL return from the queryprogram router;
4739 (e) A message specified by the cannot_route_message router option.
4741 In these cases only, Exim does include the error details in bounce and
4742 warning messages. There are also a few cases where bland messages such
4743 as "unrouteable address" or "local delivery error" are given.
4745 PH/43 $value is now also set for the "else" part of a ${run expansion.
4747 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4748 being worked on, but at least Exim now implements the latest version to
4751 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4752 process to complete was treated as a delivery failure, a timeout while
4753 writing the message to the pipe was logged, but erroneously treated as a
4754 successful delivery. Such timeouts include transport filter timeouts. For
4755 consistency with the overall process timeout, these timeouts are now
4756 treated as errors, giving rise to delivery failures by default. However,
4757 there is now a new Boolean option for the pipe transport called
4758 timeout_defer, which, if set TRUE, converts the failures into defers for
4759 both kinds of timeout. A transport filter timeout is now identified in
4762 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4763 systems where "make" and "gmake" are different, calling "gmake" at top
4764 level broke things. I've arranged for the value of $(MAKE) to be passed
4765 from the Makefile to this script so that it can call the same version of
4769 A note about Exim versions 4.44 and 4.50
4770 ----------------------------------------
4772 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4773 changes of various kinds. As a consequence, a big documentation update was
4774 needed. This delayed the release for rather longer than seemed good, especially
4775 in the light of a couple of (minor) security issues. Therefore, the changes
4776 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4777 release. So 4.44 and 4.50 are in effect two different branches that both start
4780 I have left the 4.50 change log unchanged; it contains all the changes since
4781 4.43. The change log for 4.44 is below; many of its items are identical to
4782 those for 4.50. This seems to be the most sensible way to preserve the
4783 historical information.
4789 1. Minor wording change to the doc/README.SIEVE file.
4791 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4792 computation of the current number of files was incorrect.
4794 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4795 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4798 4. Give more explanation in the error message when the command for a transport
4799 filter fails to execute.
4801 5. There are several places where Exim runs a non-Exim command in a
4802 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4803 was being done only for the command run by the queryprogram router. It is
4804 now done for all such subprocesses. The other cases are: ${run, transport
4805 filters, and the commands run by the lmtp and pipe transports.
4807 6. Added CONFIGURE_GROUP build-time option.
4809 7. Some older OS have a limit of 256 on the maximum number of file
4810 descriptors. Exim was using setrlimit() to set 1000 as a large value
4811 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4812 systems. I've change it so that if it can't get 1000, it tries for 256.
4814 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4815 was an oversight, and furthermore, ever since the addition of extra
4816 controls (e.g. 4.43/32), the checks on when to allow different forms of
4817 "control" were broken. There should now be diagnostics for all cases when a
4818 control that does not make sense is encountered.
4820 9. Added the /retain_sender option to "control=submission".
4822 10. $recipients is now available in the predata ACL (oversight).
4824 11. Tidy the search cache before the fork to do a delivery from a message
4825 received from the command line. Otherwise the child will trigger a lookup
4826 failure and thereby defer the delivery if it tries to use (for example) a
4827 cached ldap connection that the parent has called unbind on.
4829 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4830 of $address_data from the recipient verification was clobbered by the
4831 sender verification.
4833 13. The value of address_data from a sender verification is now available in
4834 $sender_address_data in subsequent conditions in the ACL statement.
4836 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4838 15. Added a new option "connect=<time>" to callout options, to set a different
4841 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4842 was its contents. (It was OK if the option was not defined at all.)
4844 17. A "Completed" log line is now written for messages that are removed from
4845 the spool by the -Mrm option.
4847 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4848 information about exactly what failed.
4850 19. Added -dd to debug only the daemon process.
4852 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4853 handles timeouts, both on the server side and network timeouts. Renamed the
4854 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4856 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4857 It is now set to "smtps".
4859 22. $host_address is now set to the target address during the checking of
4860 ignore_target_hosts.
4862 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4863 being passed; this would have caused $sender_host_name to have been used if
4864 matching the list had actually called for a host name (not very likely,
4865 since this list is usually IP addresses). A host name is now passed as
4868 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4869 code that specifies a non-restarting handler (typically sigaction() in
4870 modern systems) in an attempt to fix a rare and obscure crash bug.
4872 25. Narrowed the window for a race in the daemon that could cause it to ignore
4873 SIGCHLD signals. This is not a major problem, because they are used only to
4874 wake it up if nothing else does.
4876 26. A malformed maildirsize file could cause Exim to calculate negative values
4877 for the mailbox size or file count. Odd effects could occur as a result.
4878 The maildirsize information is now recalculated if the size or filecount
4881 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4882 support for a long time. Removed HAVE_SYS_VFS_H.
4884 28. Installed the latest version of exipick from John Jetmore.
4886 29. In an address list, if the pattern was not a regular expression, an empty
4887 subject address (from a bounce message) matched only if the pattern was an
4888 empty string. Non-empty patterns were not even tested. This was the wrong
4889 because it is perfectly reasonable to use an empty address as part of a
4890 database query. An empty address is now tested by patterns that are
4891 lookups. However, all the other forms of pattern expect the subject to
4892 contain a local part and a domain, and therefore, for them, an empty
4893 address still always fails if the pattern is not itself empty.
4895 30. Exim went into a mad DNS loop when attempting to do a callout where the
4896 host was specified on an smtp transport, and looking it up yielded more
4897 than one IP address.
4899 31. Re-factored the code for checking spool and log partition space into a
4900 function that finds that data and another that does the check. The former
4901 is then used to implement four new variables: $spool_space, $log_space,
4902 $spool_inodes, and $log_inodes.
4904 32. The RFC2047 encoding function was originally intended for short strings
4905 such as real names; it was not keeping to the 75-character limit for
4906 encoded words that the RFC imposes. It now respects the limit, and
4907 generates multiple encoded words if necessary. To be on the safe side, I
4908 have increased the buffer size for the ${rfc2047: expansion operator from
4911 33. It is now permitted to omit both strings after an "if" condition; if the
4912 condition is true, the result is "true". As before, when the second string
4913 is omitted, a false condition yields an empty string. This makes it less
4914 cumbersome to write custom ACL and router conditions.
4916 34. Failure to deliver a bounce message always caused it to be frozen, even if
4917 there was an errors_to setting on the router. The errors_to setting is now
4920 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4921 canonical form (fully expanded) before being placed in
4922 $sender_host_address.
4924 36. The table in the code that translates DNS record types into text (T_A to
4925 "A" for instance) was missing entries for NS and CNAME. It is just possible
4926 that this could have caused confusion if both these types were looked up
4927 for the same domain, because the text type is used as part of Exim's
4928 per-process caching. But the chance of anyone hitting this buglet seems
4931 37. The dnsdb lookup has been extended in a number of ways.
4933 (1) There is a new type, "zns", which walks up the domain tree until it
4934 finds some nameserver records. It should be used with care.
4936 (2) There is a new type, "mxh", which is like "mx" except that it returns
4937 just the host names, not the priorities.
4939 (3) It is now possible to give a list of domains (or IP addresses) to be
4940 looked up. The behaviour when one of the lookups defers can be
4941 controlled by a keyword.
4943 (4) It is now possible to specify the separator character for use when
4944 multiple records are returned.
4946 38. The dnslists ACL condition has been extended: it is now possible to supply
4947 a list of IP addresses and/or domains to be looked up in a particular DNS
4950 39. Added log_selector=+queue_time_overall.
4952 40. When running the queue in the test harness, wait just a tad after forking a
4953 delivery process, to get repeatability of debugging output.
4955 41. Include certificate and key file names in error message when GnuTLS fails
4956 to set them up, because the GnuTLS error message doesn't include the name
4957 of the failing file when there is a problem reading it.
4959 42. Allow both -bf and -bF in the same test run.
4961 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4963 44. The "Exiscan patch" is now merged into the mainline Exim source.
4965 45. Sometimes the final signoff response after QUIT could fail to get
4966 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4967 < 0 before doing a fflush(). This bug looks as though it goes back to the
4968 introduction of TLS in release 3.20, but "sometimes" must have been rare
4969 because the tests only now provoked it.
4971 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4972 (this can affect the format of dates).
4974 47. exim_tidydb, when checking for the continued existence of a message for
4975 which it has found a message-specific retry record, was not finding
4976 messages that were in split spool directories. Consequently, it was
4977 deleting retry records that should have stayed in existence.
4979 48. Steve fixed some bugs in eximstats.
4981 49. The SPA authentication driver was not abandoning authentication and moving
4982 on to the next authenticator when an expansion was forced to fail,
4983 contradicting the general specification for all authenticators. Instead it
4984 was generating a temporary error. It now behaves as specified.
4986 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4987 (the order specifies the preference for clients). The order is now AES256,
4988 AES128, 3DES, ARCFOUR128.
4990 51. Small patch to Sieve code - explicitly set From: when generating an
4993 52. Exim crashed if a remote delivery caused a very long error message to be
4994 recorded - for instance if somebody sent an entire SpamAssassin report back
4995 as a large number of 550 error lines. This bug was coincidentally fixed by
4996 increasing the size of one of Exim's internal buffers (big_buffer) that
4997 happened as part of the Exiscan merge. However, to be on the safe side, I
4998 have made the code more robust (and fixed the comments that describe what
5001 53. Now that there can be additional text after "Completed" in log lines (if
5002 the queue_time_overall log selector is set), a one-byte patch to exigrep
5003 was needed to allow it to recognize "Completed" as not the last thing in
5006 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5007 patch that reportedly fixes this has been added. I am not expert enough to
5008 create a test for it. This is what the patch creator wrote:
5010 "I found a little strange behaviour of ldap code when working with
5011 Windows 2003 AD Domain, where users was placed in more than one
5012 Organization Units. When I tried to give exim partial DN, the exit code
5013 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5014 But simultaneously result of request was absolutely normal ldap result,
5015 so I produce this patch..."
5017 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5018 REFERENCE, so I have modified the code to exclude the patch when that macro
5021 55. Some experimental protocols are using DNS PTR records for new purposes. The
5022 keys for these records are domain names, not reversed IP addresses. The
5023 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5024 leaves it alone. Component reversal etc. now happens only for IP addresses.
5027 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5029 57. Double the size of the debug message buffer (to 2048) so that more of very
5030 long debug lines gets shown.
5032 58. The exicyclog utility now does better if the number of log files to keep
5033 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5035 59. Two changes related to the smtp_active_hostname option:
5037 (1) $smtp_active_hostname is now available as a variable.
5038 (2) The default for smtp_banner uses $smtp_active_hostname instead
5039 of $primary_hostname.
5041 60. The host_aton() function is supposed to be passed a string that is known
5042 to be a valid IP address. However, in the case of IPv6 addresses, it was
5043 not checking this. This is a hostage to fortune. Exim now panics and dies
5044 if the condition is not met. A case was found where this could be provoked
5045 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5046 components; fortuitously, this particular loophole had already been fixed
5047 by change 4.50/55 above.
5049 If there are any other similar loopholes, the new check in host_aton()
5050 itself should stop them being exploited. The report I received stated that
5051 data on the command line could provoke the exploit when Exim was running as
5052 exim, but did not say which command line option was involved. All I could
5053 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5054 running as the user.
5057 61. There was a buffer overflow vulnerability in the SPA authentication code
5058 (which came originally from the Samba project). I have added a test to the
5059 spa_base64_to_bits() function which I hope fixes it.
5062 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5063 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5065 63. The daemon start-up calls getloadavg() while still root for those OS that
5066 need the first call to be done as root, but it missed one case: when
5067 deliver_queue_load_max is set with deliver_drop_privilege. This is
5068 necessary for the benefit of the queue runner, because there is no re-exec
5069 when deliver_drop_privilege is set.
5071 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5072 This has been fixed.
5074 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5075 was in use, was not putting the data itself into the right store pool;
5076 consequently, it could be overwritten for a subsequent message in the same
5077 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5080 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5082 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5083 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5084 the function were treating the return as a boolean value, which happened to
5085 work because 0=false and not-0=true, but is not correct code.
5087 68. The host_aton() function was not handling scoped IPv6 addresses (those
5088 with, for example, "%eth0" on the end) correctly.
5090 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5091 negated items (that is, ~something) in unsigned ints. Some compilers
5092 apparently mutter when there is no cast.
5094 70. If an address verification called from an ACL failed, and did not produce a
5095 user-specific message (i.e. there was only a "system" message), nothing was
5096 put in $acl_verify_message. In this situation, it now puts the system
5099 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5100 session; change 4.31/43 added the unwanted input to the log line - except
5101 that it did not do this in the start of session case. It now does.
5103 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5104 This is wrong and can cause the other end to generate a synchronization
5105 error if it is another Exim or anything else that does the synchronization
5106 check. A QUIT command is no longer sent after a timeout.
5108 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5109 during host lookups.
5111 74. The defer_ok option of callout verification was not working if it was used
5112 when verifying addresses in header lines, that is, for this case:
5114 verify = header_sender/callout=defer_ok
5116 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5117 those file descriptors could be used for SMTP connections. If anything
5118 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5119 could be sent to the SMTP client, causing chaos. The daemon now opens
5120 stdin, stdout, and stderr to /dev/null when it puts itself into the
5123 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5124 log by default. The user can override this with suitable Perl magic.
5126 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5127 the log message when discard triggers, was not working for the DATA ACL or
5128 for the non-SMTP ACL.
5130 78. Error message wording change in sieve.c.
5132 79. If smtp_accept_max_per_host was set, the number of connections could be
5133 restricted to fewer than expected, because the daemon was trying to set up
5134 a new connection before checking whether the processes handling previous
5135 connections had finished. The check for completed processes is now done
5136 earlier. On busy systems, this bug wouldn't be noticed because something
5137 else would have woken the daemon, and it would have reaped the completed
5140 80. If a message was submitted locally by a user whose login name contained one
5141 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5142 It caused a spool format error. I have fixed the spool reading code. A
5143 related problem was that the "from" clause in the Received: line became
5144 illegal because of the space(s). It is now covered by ${quote_local_part.
5146 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5149 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5151 83. Patch from Sieve maintainer to fix unterminated string problem in
5152 "vacation" handling.
5154 84. Some minor changes to the Linux configuration files to help with other
5155 OS variants using glibc.
5157 85. One more patch for Sieve to update vacation handling to latest spec.
5160 ----------------------------------------------------
5161 See the note above about the 4.44 and 4.50 releases.
5162 ----------------------------------------------------
5168 1. Change 4.43/35 introduced a bug that caused file counts to be
5169 incorrectly computed when quota_filecount was set in an appendfile
5172 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5173 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5176 3. Give more explanation in the error message when the command for a transport
5177 filter fails to execute.
5179 4. There are several places where Exim runs a non-Exim command in a
5180 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5181 was being done only for the command run by the queryprogram router. It is
5182 now done for all such subprocesses. The other cases are: ${run, transport
5183 filters, and the commands run by the lmtp and pipe transports.
5185 5. Some older OS have a limit of 256 on the maximum number of file
5186 descriptors. Exim was using setrlimit() to set 1000 as a large value
5187 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5188 systems. I've change it so that if it can't get 1000, it tries for 256.
5190 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5191 was an oversight, and furthermore, ever since the addition of extra
5192 controls (e.g. 4.43/32), the checks on when to allow different forms of
5193 "control" were broken. There should now be diagnostics for all cases when a
5194 control that does not make sense is encountered.
5196 7. $recipients is now available in the predata ACL (oversight).
5198 8. Tidy the search cache before the fork to do a delivery from a message
5199 received from the command line. Otherwise the child will trigger a lookup
5200 failure and thereby defer the delivery if it tries to use (for example) a
5201 cached ldap connection that the parent has called unbind on.
5203 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5204 of $address_data from the recipient verification was clobbered by the
5205 sender verification.
5207 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5208 was its contents. (It was OK if the option was not defined at all.)
5210 11. A "Completed" log line is now written for messages that are removed from
5211 the spool by the -Mrm option.
5213 12. $host_address is now set to the target address during the checking of
5214 ignore_target_hosts.
5216 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5217 being passed; this would have caused $sender_host_name to have been used if
5218 matching the list had actually called for a host name (not very likely,
5219 since this list is usually IP addresses). A host name is now passed as
5222 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5223 code that specifies a non-restarting handler (typically sigaction() in
5224 modern systems) in an attempt to fix a rare and obscure crash bug.
5226 15. Narrowed the window for a race in the daemon that could cause it to ignore
5227 SIGCHLD signals. This is not a major problem, because they are used only to
5228 wake it up if nothing else does.
5230 16. A malformed maildirsize file could cause Exim to calculate negative values
5231 for the mailbox size or file count. Odd effects could occur as a result.
5232 The maildirsize information is now recalculated if the size or filecount
5235 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5236 support for a long time. Removed HAVE_SYS_VFS_H.
5238 18. Updated exipick to current release from John Jetmore.
5240 19. Allow an empty sender to be matched against a lookup in an address list.
5241 Previously the only cases considered were a regular expression, or an
5244 20. Exim went into a mad DNS lookup loop when doing a callout where the
5245 host was specified on the transport, if the DNS lookup yielded more than
5248 21. The RFC2047 encoding function was originally intended for short strings
5249 such as real names; it was not keeping to the 75-character limit for
5250 encoded words that the RFC imposes. It now respects the limit, and
5251 generates multiple encoded words if necessary. To be on the safe side, I
5252 have increased the buffer size for the ${rfc2047: expansion operator from
5255 22. Failure to deliver a bounce message always caused it to be frozen, even if
5256 there was an errors_to setting on the router. The errors_to setting is now
5259 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5260 canonical form (fully expanded) before being placed in
5261 $sender_host_address.
5263 24. Updated eximstats to version 1.33
5265 25. Include certificate and key file names in error message when GnuTLS fails
5266 to set them up, because the GnuTLS error message doesn't include the name
5267 of the failing file when there is a problem reading it.
5269 26. Expand error message when OpenSSL has problems setting up cert/key files.
5272 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5273 (this can affect the format of dates).
5275 28. exim_tidydb, when checking for the continued existence of a message for
5276 which it has found a message-specific retry record, was not finding
5277 messages that were in split spool directories. Consequently, it was
5278 deleting retry records that should have stayed in existence.
5280 29. eximstats updated to version 1.35
5281 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5282 1.35 - bugfix such that pie charts by volume are generated correctly
5284 30. The SPA authentication driver was not abandoning authentication and moving
5285 on to the next authenticator when an expansion was forced to fail,
5286 contradicting the general specification for all authenticators. Instead it
5287 was generating a temporary error. It now behaves as specified.
5289 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5290 (the order specifies the preference for clients). The order is now AES256,
5291 AES128, 3DES, ARCFOUR128.
5293 31. Small patch to Sieve code - explicitly set From: when generating an
5296 32. Exim crashed if a remote delivery caused a very long error message to be
5297 recorded - for instance if somebody sent an entire SpamAssassin report back
5298 as a large number of 550 error lines. This bug was coincidentally fixed by
5299 increasing the size of one of Exim's internal buffers (big_buffer) that
5300 happened as part of the Exiscan merge. However, to be on the safe side, I
5301 have made the code more robust (and fixed the comments that describe what
5304 33. Some experimental protocols are using DNS PTR records for new purposes. The
5305 keys for these records are domain names, not reversed IP addresses. The
5306 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5307 leaves it alone. Component reversal etc. now happens only for IP addresses.
5310 34. The host_aton() function is supposed to be passed a string that is known
5311 to be a valid IP address. However, in the case of IPv6 addresses, it was
5312 not checking this. This is a hostage to fortune. Exim now panics and dies
5313 if the condition is not met. A case was found where this could be provoked
5314 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5315 components; fortuitously, this particular loophole had already been fixed
5316 by change 4.50/55 or 4.44/33 above.
5318 If there are any other similar loopholes, the new check in host_aton()
5319 itself should stop them being exploited. The report I received stated that
5320 data on the command line could provoke the exploit when Exim was running as
5321 exim, but did not say which command line option was involved. All I could
5322 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5323 running as the user.
5326 35. There was a buffer overflow vulnerability in the SPA authentication code
5327 (which came originally from the Samba project). I have added a test to the
5328 spa_base64_to_bits() function which I hope fixes it.
5331 36. The daemon start-up calls getloadavg() while still root for those OS that
5332 need the first call to be done as root, but it missed one case: when
5333 deliver_queue_load_max is set with deliver_drop_privilege. This is
5334 necessary for the benefit of the queue runner, because there is no re-exec
5335 when deliver_drop_privilege is set.
5337 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5338 was in use, was not putting the data itself into the right store pool;
5339 consequently, it could be overwritten for a subsequent message in the same
5340 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5343 38. Sometimes the final signoff response after QUIT could fail to get
5344 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5345 < 0 before doing a fflush(). This bug looks as though it goes back to the
5346 introduction of TLS in release 3.20, but "sometimes" must have been rare
5347 because the tests only now provoked it.
5353 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5354 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5355 Now it returns an integer. A number of calls were still expecting a T/F
5356 return. Fortuitously, in all cases, the tests worked in OK situations,
5357 which is the norm. However, things would have gone wrong on any write
5358 failures on the smtp file descriptor. This function is used when sending
5359 messages over SMTP and also when doing verify callouts.
5361 2. When Exim is called to do synchronous delivery of a locally submitted
5362 message (the -odf or -odi options), it no longer closes stderr before doing
5365 3. Implemented the mua_wrapper option.
5367 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5369 5. Implemented the functions header_remove(), header_testname(),
5370 header_add_at_position(), and receive_remove_recipient(), and exported them
5373 6. If an ACL "warn" statement specified the addition of headers, Exim already
5374 inserted X-ACL-Warn: at the start if there was no header name. However, it
5375 was not making this test for the second and subsequent header lines if
5376 there were newlines in the string. This meant that an invalid header could
5377 be inserted if Exim was badly configured.
5379 7. Allow an ACL "warn" statement to add header lines at the start or after all
5380 the Received: headers, as well as at the end.
5382 8. Added the rcpt_4xx retry error code.
5384 9. Added postmaster_mailfrom=xxx to callout verification option.
5386 10. Added mailfrom=xxxx to the callout verification option, for verify=
5389 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5390 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5392 12. Inserted some casts to stop certain compilers warning when using pointer
5393 differences as field lengths or precisions in printf-type calls (mostly
5394 affecting debugging statements).
5396 13. Added optional readline() support for -be (dynamically loaded).
5398 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5399 same clock tick as a message's arrival, so that its received time was the
5400 same as the "first fail" time on the retry record, and that message
5401 remained on the queue past the ultimate address timeout, every queue runner
5402 would try a delivery (because it was past the ultimate address timeout) but
5403 after another failure, the ultimate address timeout, which should have then
5404 bounced the address, did not kick in. This was a "< instead of <=" error;
5405 in most cases the first failure would have been in the next clock tick
5406 after the received time, and all would be well.
5408 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5409 being recognized when the domain list was tested by the match_domain
5410 condition in an expansion string.
5412 16. Added the ${str2b64: operator.
5414 17. Exim was always calling setrlimit() to set a large limit for the number of
5415 processes, without checking whether the existing limit was already
5416 adequate. (It did check for the limit on file descriptors.) Furthermore,
5417 errors from getrlimit() and setrlimit() were being ignored. Now they are
5418 logged to the main and panic logs, but Exim does carry on, to try to do its
5419 job under whatever limits there are.
5421 18. Imported PCRE 5.0.
5423 19. Trivial typo in log message " temporarily refused connection" (the leading
5426 20. If the log selector return_path_on_delivery was set and an address was
5427 redirected to /dev/null, the delivery process crashed because it assumed
5428 that a return path would always be set for a "successful" delivery. In this
5429 case, the whole delivery is bypassed as an optimization, and therefore no
5432 21. Internal re-arrangement: the function for sending a challenge and reading
5433 a response while authentication was assuming a zero-terminated challenge
5434 string. It's now changed to take a pointer and a length, to allow for
5435 binary data in such strings.
5437 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5439 23. Exim was not respecting finduser_retries when seeking the login of the
5440 uid under which it was called; it was always trying 10 times. (The default
5441 setting of finduser_retries is zero.) Also, it was sleeping after the final
5442 failure, which is pointless.
5444 24. Implemented tls_on_connect_ports.
5446 25. Implemented acl_smtp_predata.
5448 26. If the domain in control=submission is set empty, Exim assumes that the
5449 authenticated id is a complete email address when it generates From: or
5450 Sender: header lines.
5452 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5453 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5454 chown and chgrp in /bin and hostname in /usr/bin.
5456 28. Exim was keeping the "process log" file open after each use, just as it
5457 does for the main log. This opens the possibility of it remaining open for
5458 long periods when the USR1 signal hits a daemon. Occasional processlog
5459 errors were reported, that could have been caused by this. Anyway, it seems
5460 much more sensible not to leave this file open at all, so that is what now
5463 29. The long-running daemon process does not normally write to the log once it
5464 has entered its main loop, and it closes the log before doing so. This is
5465 so that log files can straightforwardly be renamed and moved. However,
5466 there are a couple of unusual error situations where the daemon does write
5467 log entries, and I had neglected to close the log afterwards.
5469 30. The text of an SMTP error response that was received during a remote
5470 delivery was being truncated at 512 bytes. This is too short for some of
5471 the long messages that one sometimes sees. I've increased the limit to
5474 31. It is now possible to make retry rules that apply only when a message has a
5475 specific sender, in particular, an empty sender.
5477 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5478 it possible to be selective about when SMTP synchronization is enforced.
5480 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5482 32. Implemented hosts_connection_nolog.
5484 33. Added an ACL for QUIT.
5486 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5489 35. Added mailbox_size and mailbox_filecount to appendfile.
5491 36. Added control = no_multiline_responses to ACLs.
5493 37. There was a bug in the logic of the code that waits for the clock to tick
5494 in the case where the clock went backwards by a substantial amount such
5495 that the microsecond fraction of "now" was more than the microsecond
5496 fraction of "then" (but the whole seconds number was less).
5498 38. Added support for the libradius Radius client library this is found on
5499 FreeBSD (previously only the radiusclient library was supported).
5505 1. When certain lookups returned multiple values in the form name=value, the
5506 quoting of the values was not always being done properly. Specifically:
5507 (a) If the value started with a double quote, but contained no whitespace,
5509 (b) If the value contained whitespace other than a space character (i.e.
5510 tabs or newlines or carriage returns) it was not quoted.
5511 This fix has been applied to the mysql and pgsql lookups by writing a
5512 separate quoting function and calling it from the lookup code. The fix
5513 should probably also be applied to nisplus, ibase and oracle lookups, but
5514 since I cannot test any of those, I have not disturbed their existing code.
5516 2. A hit in the callout cache for a specific address caused a log line with no
5517 reason for rejecting RCPT. Now it says "Previous (cached) callout
5518 verification failure".
5520 3. There was an off-by-one bug in the queryprogram router. An over-long
5521 return line was truncated at 256 instead of 255 characters, thereby
5522 overflowing its buffer with the terminating zero. As well as fixing this, I
5523 have increased the buffer size to 1024 (and made a note to document this).
5525 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5526 when Exim is waiting for an SMTP response from a remote server, Exim
5527 restarts its select() call on the socket, thereby resetting its timeout.
5528 This is not a problem when such interrupts are rare. Somebody set up a cron
5529 job to run exiwhat every 2 minutes, which is less than the normal select()
5530 timeout (5 or 10 minutes). This meant that the select() timeout never
5531 kicked in because it was always reset. I have fixed this by comparing the
5532 time when an interrupt arrives with the time at the start of the first call
5533 to select(). If more time than the timeout has elapsed, the interrupt is
5534 treated as a timeout.
5536 5. Some internal re-factoring in preparation for the addition of Sieve
5537 extensions (by MH). In particular, the "personal" test is moved to a
5538 separate function, and given an option for scanning Cc: and Bcc: (which is
5539 not set for Exim filters).
5541 6. When Exim created an email address using the login of the caller as the
5542 local part (e.g. when creating a From: or Sender: header line), it was not
5543 quoting the local part when it contained special characters such as @.
5545 7. Installed new OpenBSD configuration files.
5547 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5548 try to make them clearer.
5550 9. Callout options, other than the timeout value, were being ignored when
5551 verifying sender addresses in header lines. For example, when using
5553 verify = header_sender/callout=no_cache
5555 the cache was (incorrectly) being used.
5557 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5558 only the Cygwin environment.
5560 11. When return_path_on_delivery was set as a log selector, if different remote
5561 addresses in the same message used different return paths and parallel
5562 remote delivery occurred, the wrong values would sometimes be logged.
5563 (Whenever a remote delivery process finished, the return path value from
5564 the most recently started remote delivery process was logged.)
5566 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5567 lines when AUTH and/or TLS are in use. This is the "received protocol"
5568 field. Exim used to use "asmtp" for authenticated SMTP, without any
5569 indication (in the protocol name) for TLS use. Now it follows the RFC and
5570 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5571 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5572 names appear in log lines as well as in Received: header lines.
5574 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5575 extensions, and comparison tests, and to fix some bugs.
5577 14. Changes to the "personal" filter test:
5579 (1) The test was buggy in that it was just doing the equivalent of
5580 "contains" tests on header lines. For example, if a user's address was
5581 anne@some.where, the "personal" test would incorrectly be true for
5583 To: susanne@some.where
5585 This test is now done by extracting each address from the header in turn,
5586 and checking the entire address. Other tests that are part of "personal"
5587 are now done using regular expressions (for example, to check local parts
5588 of addresses in From: header lines).
5590 (2) The list of non-personal local parts in From: addresses has been
5591 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5592 taken from the Sieve specification recommendations.
5594 (3) If the message contains any header line starting with "List-" it is
5595 treated as non-personal.
5597 (4) The test for "circular" in the Subject: header line has been removed
5598 because it now seems ill-conceived.
5600 15. Minor typos in src/EDITME comments corrected.
5602 16. Installed latest exipick from John Jetmore.
5604 17. If headers_add on a router specified a text string that was too long for
5605 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5606 of string_sprintf() is now avoided.
5608 18. $message_body_size was not set (it was always zero) when running the DATA
5609 ACL and the local_scan() function.
5611 19. For the "mail" command in an Exim filter, no default was being set for
5612 the once_repeat time, causing a random time value to be used if "once" was
5613 specified. (If the value happened to be <= 0, no repeat happened.) The
5614 default is now 0s, meaning "never repeat". The "vacation" command was OK
5615 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5616 (I found it when inspecting the code).
5618 20. There is now an overall timeout for performing a callout verification. It
5619 defaults to 4 times the callout timeout, which applies to individual SMTP
5620 commands during the callout. The overall timeout applies when there is more
5621 than one host that can be tried. The timeout is checked before trying the
5622 next host. This prevents very long delays if there are a large number of
5623 hosts and all are timing out (e.g. when the network connections are timing
5624 out). The value of the overall timeout can be changed by specifying an
5625 additional sub-option for "callout", called "maxwait". For example:
5627 verify = sender/callout=5s,maxwait=20s
5629 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5630 to the end before writing, but this should make it even safer).
5632 22. Exim was forgetting that it had advertised PIPELINING for the second and
5633 subsequent messages on an SMTP connection. It was also not resetting its
5634 memory on STARTTLS and an internal HELO.
5636 23. When Exim logs an SMTP synchronization error within a session, it now
5637 records whether PIPELINING has been advertised or not.
5639 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5640 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5641 rather than long int.
5643 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5645 26. Added the never_mail option to autoreply.
5651 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5652 crash if the getsockname() call failed; this can happen if a connection is
5653 closed very soon after it is established. The problem was simply in the
5654 order in which certain operations were done, causing Exim to try to write
5655 to the SMTP stream before it had set up the file descriptor. The bug has
5656 been fixed by making things happen in the correct order.
5662 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5663 before the connection was closed, thus losing the rejection response.
5665 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5666 some early Solaris releases, but causes trouble in current releases where
5667 socklen_t is defined.
5669 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5672 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5675 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5676 that releasing the top of it at the end releases what was used for sub-
5677 expansions (unless the block got too big). However, discard this block if
5678 the first thing is a variable or header, so that we can use its block when
5679 it is dynamic (useful for very large $message_headers, for example).
5681 6. Lookups now cache *every* query, not just the most recent. A new, separate
5682 store pool is used for this. It can be recovered when all lookup caches are
5683 flushed. Lookups now release memory at the end of their result strings.
5684 This has involved some general refactoring of the lookup sources.
5686 7. Some code has been added to the store_xxx() functions to reduce the amount
5687 of flapping under certain conditions.
5689 8. log_incoming_interface used to affect only the <= reception log lines. Now
5690 it causes the local interface and port to be added to several more SMTP log
5691 lines, for example "SMTP connection from", and rejection lines.
5693 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5695 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5697 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5698 could be overwritten at the end of the current message (or the start of a
5699 new message if it was set in a HELO ACL). The value is now preserved for
5700 the duration of the SMTP connection.
5702 12. If a transport had a headers_rewrite setting, and a matching header line
5703 contained an unqualified address, that address was qualified, even if it
5704 did not match any rewriting rules. The underlying bug was that the values
5705 of the flags that permit the existence of unqualified sender and recipient
5706 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5707 non-local messages, and by -bnq for local messages) were not being
5708 preserved with the message after it was received.
5710 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5711 "next input=" as part of the text comprising the host identity instead of
5712 the correct text. The code was using the same buffer for two different
5713 strings. However, depending on which order the printing function evaluated
5714 its arguments, the bug did not always show up. Under Linux, for example, my
5715 test suite worked just fine.
5717 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5718 doesn't work with some older versions of Perl. It has been changed to "my",
5719 which in any case is probably the better facility to use.
5721 15. A really picky compiler found some instances of statements for creating
5722 error messages that either had too many or two few arguments for the format
5725 16. The size of the buffer for calls to the DNS resolver has been increased
5726 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5727 for addresses that have a lot of PTR records. This alleviates a problem; it
5728 does not fully solve it.
5730 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5731 buffer now truncates the list and logs the incident, which is the same
5732 action as happens when Exim is looking up a host name and its aliases.
5733 Previously in this situation something unpredictable would happen;
5734 sometimes it was "internal error: store_reset failed".
5736 18. If a server dropped the connection unexpectedly when an Exim client was
5737 using GnuTLS and trying to read a response, the client delivery process
5738 crashed while trying to generate an error log message.
5740 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5741 string, for example:
5743 warn message = H1: something\nH2: something
5745 the text was added as a single header line from Exim's point of view
5746 though it ended up OK in the delivered message. However, searching for the
5747 second and subsequent header lines using $h_h2: did not work. This has been
5748 fixed. Similarly, if a system filter added multiple headers in this way,
5749 the routers could not see them.
5751 20. Expanded the error message when iplsearch is called with an invalid key to
5752 suggest using net-iplsearch in a host list.
5754 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5755 ACLs are no longer actually imposed (and a message to that effect is
5758 22. If a "gecos" field in a passwd entry contained escaped characters, in
5759 particular, if it contained a \" sequence, Exim got it wrong when building
5760 a From: or a Sender: header from that name. A second bug also caused
5761 incorrect handling when an unquoted " was present following a character
5762 that needed quoting.
5764 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5765 was not being matched caselessly.
5767 24. Arranged for all hyphens in the exim.8 source to be escaped with
5770 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5771 properly. Recipient callout cache records were still being keyed to include
5772 the sender, even when use_sender was set false. This led to far more
5773 callouts that were necessary. The sender is no longer included in the key
5774 when use_sender is false.
5776 26. Added "control = submission" modifier to ACLs.
5778 27. Added the ${base62d: operator to decode base 62 numbers.
5780 28. dnsdb lookups can now access SRV records.
5782 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5783 the configuration file.
5785 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5786 (-v) mode. This makes the output for a verbose queue run more intelligible.
5788 31. Added a use_postmaster feature to recipient callouts.
5790 32. Added the $body_zerocount variable, containing the number of binary zero
5791 bytes in the message body.
5793 33. The time of last modification of the "new" subdirectory is now used as the
5794 "mailbox time last read" when there is a quota error for a maildir
5797 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5799 35. Added +ignore_unknown as a special item in host lists.
5801 36. Code for decoding IPv6 addresses in host lists is now included, even if
5802 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5803 address was recognized as an IP address, but was then not correctly decoded
5804 into binary, causing unexpected and incorrect effects when compared with
5811 1. Very minor rewording of debugging text in manualroute to say "list of
5812 hosts" instead of "hostlist".
5814 2. If verify=header_syntax was set, and a header line with an unqualified
5815 address (no domain) and a large number of spaces between the end of the
5816 name and the colon was received, the reception process suffered a buffer
5817 overflow, and (when I tested it) crashed. This was caused by some obsolete
5818 code that should have been removed. The fix is to remove it!
5820 3. When running in the test harness, delay a bit after writing a bounce
5821 message to get a bit more predictability in the log output.
5823 4. Added a call to search_tidyup() just before forking a reception process. In
5824 theory, someone could use a lookup in the expansion of smtp_accept_max_
5825 per_host which, without the tidyup, could leave open a database connection.
5827 5. Added the variables $recipient_data and $sender_data which get set from a
5828 lookup success in an ACL "recipients" or "senders" condition, or a router
5829 "senders" option, similar to $domain_data and $local_part_data.
5831 6. Moved the writing of debug_print from before to after the "senders" test
5834 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5835 problems for message scanning, either using a data ACL, or using
5836 local_scan() because the Received: header was not generated till after they
5837 were called (in order to set the time as the time of reception completion).
5838 I have revised the way this works. The header is now generated after the
5839 body is received, but before the ACL or local_scan() are called. After they
5840 are run, the timestamp in the header is updated.
5846 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5847 before starting a queue runner without re-exec. This happened only when
5848 deliver_drop_privilege was set or when the Exim user was set to root. The
5849 effect of the bug was that timeouts during subsequent deliveries caused
5850 crashes instead of being properly handled. The handler is now left at its
5851 default (and expected) setting.
5853 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5854 message, again when deliver_drop_privilege is set or Exim is run as root.
5855 The bug described in (1) was not present in this case, but the tidying up
5856 of the other signals was missing. I have made the two cases consistent.
5858 3. The ignore_target_hosts setting on a manualroute router was being ignored
5859 for hosts that were looked up using the /MX notation.
5861 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5864 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5865 operated on the sender address. After changing the $sender_address to <>
5866 for the sender address verify, Exim was re-instated it as the original
5867 (before rewriting) address, but remembering that it had rewritten it, so it
5868 wasn't rewriting it again. This bug also had the effect of breaking the
5869 sender address verification caching when the sender address was rewritten.
5871 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5872 This has been changed so that if the ip literal address matches
5873 ignore_target_hosts, the router declines.
5875 7. Added expansion conditions match_domain, match_address, and match_local_
5876 part (NOT match_host).
5878 8. The placeholder for the Received: header didn't have a length field set.
5880 9. Added code to Exim itself and to exim_lock to test for a specific race
5881 condition that could lead to file corruption when using MBX delivery. The
5882 issue is with the lockfile that is created in /tmp. If this file is removed
5883 after a process has opened it but before that process has acquired a lock,
5884 there is the potential for a second process to recreate the file and also
5885 acquire a lock. This could lead to two Exim processes writing to the file
5886 at the same time. The added code performs the same test as UW imapd; it
5887 checks after acquiring the lock that its file descriptor still refers to
5888 the same named file.
5890 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5891 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5894 11. Added the smtp_active_hostname option. If used, this will typically be made
5895 to depend on the incoming interface address. Because $interface_address is
5896 not set up until the daemon has forked a reception process, error responses
5897 that can happen earlier (such as "too many connections") no longer contain
5900 12. If an expansion in a condition on a "warn" statement fails because a lookup
5901 defers, the "warn" statement is abandoned, and the next ACL statement is
5902 processed. Previously this caused the whole ACL to be aborted.
5904 13. Added the iplsearch lookup type.
5906 14. Added ident_timeout as a log selector.
5908 15. Added tls_certificate_verified as a log selector.
5910 16. Added a global option tls_require_ciphers (compare the smtp transport
5911 option of the same name). This controls incoming TLS connections.
5913 17. I finally figured out how to make tls_require_ciphers do a similar thing
5914 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5915 before starting the TLS session.
5917 18. Tabs are now shown as \t in -bP output.
5919 19. If the log selector return_path_on_delivery was set, Exim crashed when
5920 bouncing a message because it had too many Received: header lines.
5922 20. If two routers both had headers_remove settings, and the first one included
5923 a superfluous trailing colon, the final name in the first list and the
5924 first name in the second list were incorrectly joined into one item (with a
5925 colon in the middle).
5931 1. Added -C and -D options to the exinext utility, mainly to make it easier
5932 to include in the automated testing, but these could be helpful when
5933 multiple configurations are in use.
5935 2. The exinext utility was not formatting the output nicely when there was
5936 an alternate port involved in the retry record key, nor when there was a
5937 message id as well (for retries that were specific to a specific message
5938 and a specific host). It was also confused by IPv6 addresses, because of
5939 the additional colons they contain. I have fixed the IPv4 problem, and
5940 patched it up to do a reasonable job for IPv6.
5942 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5943 delivery, the log line now contains "pipelined" if PIPELINING was used.
5945 4. An SMTP transport process used to panic and die if the bind() call to set
5946 an explicit outgoing interface failed. This has been changed; it is now
5947 treated in the same way as a connect() failure.
5949 5. A reference to $sender_host_name in the part of a conditional expansion
5950 that was being skipped was still causing a DNS lookup. This no longer
5953 6. The def: expansion condition was not recognizing references to header lines
5954 that used bh_ and bheader_.
5956 7. Added the _cache feature to named lists.
5958 8. The code for checking quota_filecount in the appendfile transport was
5959 allowing one more file than it should have been.
5961 9. For compatibility with Sendmail, the command line option
5969 and sets the incoming protocol and host name (for trusted callers). The
5970 host name and its colon can be omitted when only the protocol is to be set.
5971 Note the Exim already has two private options, -pd and -ps, that refer to
5972 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5973 "s", but I don't think that's a major issue.
5975 10. A number of refactoring changes to the code, none of which should affect
5978 (a) The number of logging options was getting close to filling up the
5979 32-bit word that was used as a bit map. I have split them into two classes:
5980 those that are passed in the argument to log_write(), and those that are
5981 only ever tested independently outside of that function. These are now in
5982 separate 32-bit words, so there is plenty of room for expansion again.
5983 There is no change in the user interface or the logging behaviour.
5985 (b) When building, for example, log lines, the code previously used a
5986 macro that called string_cat() twice, in order to add two strings. This is
5987 not really sufficiently general. Furthermore, there was one instance where
5988 it was actually wrong because one of the argument was used twice, and in
5989 one call a function was used. (As it happened, calling the function twice
5990 did not affect the overall behaviour.) The macro has been replaced by a
5991 function that can join an arbitrary number of extra strings onto a growing
5994 (c) The code for expansion conditions now uses a table and a binary chop
5995 instead of a serial search (which was left over from when there were very
5996 few conditions). Also, it now recognizes conditions like "pam" even when
5997 the relevant support is not compiled in: a suitably worded error message is
5998 given if an attempt is made to use such a condition.
6000 11. Added ${time_interval:xxxxx}.
6002 12. A bug was causing one of the ddress fields not to be passed back correctly
6003 from remote delivery subprocesses. The field in question was not being
6004 subsequently used, so this caused to problems in practice.
6006 13. Added new log selectors queue_time and deliver_time.
6008 14. Might have fixed a bug in maildirsizefile handling that threw up
6009 "unexpected character" debug warnings, and recalculated the data
6010 unnecessarily. In any case, I expanded the warning message to give more
6013 15. Added the message "Restricted characters in address" to the statements in
6014 the default ACL that block characters like @ and % in local parts.
6016 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6017 Three changes have been made:
6019 (a) There was a serious bug; a negative response to MAIL caused the whole
6020 recipient domain to be cached as invalid, thereby blocking all messages
6021 to all local parts at the same domain, from all senders. This bug has
6022 been fixed. The domain is no longer cached after a negative response to
6023 MAIL if the sender used is not empty.
6025 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6028 (c) A new callout option, "use_sender" has been added for people who want
6029 the modified behaviour.
6035 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6038 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6039 indeed breaks things for older releases.
6041 3. Added additional logging to the case where there is a problem reading data
6042 from a filter that is running in a subprocess using a pipe, in order to
6043 try to track down a specific problem.
6045 4. Testing facility fudge: when running in the test harness and attempting
6046 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6047 getting "No route to host". Convert this to a timeout.
6049 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6052 6. Some OS don't have socklen_t but use size_t instead. This affects the
6053 fifth argument of getsockopt() amongst other things. This is now
6054 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6055 can be set for individual OS. I have set it for SunOS5, OSF1, and
6056 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6057 some earlier ones do not.
6059 7. Change 4.30/15 was not doing the test caselessly.
6061 8. The standard form for an IPv6 address literal was being rejected by address
6062 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6063 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6064 this, as well as the form without the "IPv6" on the front (but only when
6065 address literals are enabled, of course).
6067 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6069 10. Exim crashed if a message with an empty sender address specified by -f
6070 encountered a router with an errors_to setting. This could be provoked only
6071 by a command such as
6075 where an empty string was supplied; "<>" did not hit this bug.
6077 11. Installed PCRE release 4.5.
6079 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6080 remained set. It is now erased.
6082 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6083 times from message ids (which are base 36 rather than the normal 62).
6085 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6086 were being counted as actual protocol errors, and logged if the log
6087 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6088 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6089 and DATA following a set of rejected RCPTs do not count as protocol errors.
6090 In other words, Exim assumes they were pipelined, though this may not
6091 actually be the case. Of course, in all cases the client gets an
6092 appropriate error code.
6094 15. If a lookup fails in an ACL condition, a message about the failure may
6095 be available; it is used if testing the ACL cannot continue, because most
6096 such messages specify what the cause of the deferral is. However, some
6097 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6098 that caused an old message to be retained and used if a later statement
6099 caused a defer, replacing the real cause of the deferral.
6101 16. If an IP address had so many PTR records that the DNS lookup buffer
6102 was not large enough to hold them, Exim could crash while trying to process
6103 the truncated data. It now detects and logs this case.
6105 17. Further to 4.21/58, another change has been made: if (and only if) the
6106 first line of a message (the first header line) ends with CRLF, a bare LF
6107 in a subsequent header line has a space inserted after it, so as not to
6108 terminate the header.
6110 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6111 unnecessarily, used atoi() instead of strtol(), and didn't check the
6112 termination when getting file sizes from file names by regex.
6114 19. Completely re-implemented the support for maildirsize files, in the light
6115 of a number of problems with the previous contributed implementation
6116 (4.30/29). In particular:
6118 . If the quota is zero, the maildirsize file is maintained, but no quota is
6121 . If the maildir directory does not exist, it is created before any attempt
6122 to write a maildirsize file.
6124 . The quota value in the file is just a cache; if the quota is changed in
6125 the transport, the new value overrides.
6127 . A regular expression is available for excluding directories from the
6130 20. The autoreply transport checks the characters in options that define the
6131 message's headers; it allows continued headers, but it was checking with
6132 isspace() after an embedded newline instead of explicitly looking for a
6135 21. If all the "regular" hosts to which an address was routed had passed their
6136 expiry times, and had not reached their retry times, the address was
6137 bounced, even if fallback hosts were defined. Now Exim should go on to try
6140 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6141 equivalent code in the SMTP transport. Some hosts send humungous responses
6142 to HELO/EHLO, more than 1024 it seems.
6144 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6145 gives compiler warnings in some environments. I've now done it "properly",
6148 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6149 (because of problems with the built-in one) was declared to return uschar *
6150 instead of char *, causing compiler failure.
6152 25. Fixed a file descriptor leak when processing alias/forward files.
6154 26. Fixed a minor format string issue in dbfn.c.
6156 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6158 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6159 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6162 29. When a sender address is verified, it is cached, to save repeating the test
6163 when there is more than one recipient in a message. However, when the
6164 verification involves a callout, it is possible for different callout
6165 options to be set for different recipients. It is too complicated to keep
6166 track of this in the cache, so now Exim always runs a verification when a
6167 callout is required, relying on the callout cache for the optimization.
6168 The overhead is duplication of the address routing, but this should not be
6171 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6172 to be verified with callout=postmaster, and the main callout worked but the
6173 postmaster check failed, the verification correctly failed. However, if a
6174 subsequent RCPT command asked for sender verification *without* the
6175 postmaster check, incorrect caching caused this verification also to fail,
6178 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6179 it was not caching the DNS options (qualify_single, search_parents) that
6180 were used when the lookup failed. A subsequent lookup with different
6181 options therefore always gave the same answer, though there were cases
6182 where it should not have. (Example: a "domains = !$mx_any" option on a
6183 dnslookup router: the "domains" option is always processed without any
6184 widening, but the router might have qualify_single set.) Now Exim uses the
6185 cached value only when the same options are set.
6187 32. Added John Jetmore's "exipick" utility to the distribution.
6189 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6190 than a timeout (e.g. a certificate is required, and is not provided), an
6191 Exim server now closes the connection immediately. Previously it waited for
6192 the client to close - but if the client is SSL, it seems that they each
6193 wait for each other, leading to a delay before one of them times out.
6195 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6196 maintained 0.8.x compatibility because I don't think many are using it, and
6197 it is clearly obsolete.
6199 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6202 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6203 client certificate was expired. A simple patch fixes this, though I don't
6204 understand the full logic of why the verify callback is called multiple
6207 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6208 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6209 which causes problems with some clients (such as the Certicom SSL Plus
6210 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6211 disables the coutermeasure allowing Eudora to connect."
6213 38. Exim was not checking that a write() to a log file succeeded. This could
6214 lead to Bad Things if a log got too big, in particular if it hit a file
6215 size limit. Exim now panics and dies if it cannot write to a log file, just
6216 as it does if it cannot open a log file.
6218 39. Modified OS/Makefile-Linux so that it now contains
6220 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6222 The two -D definitions ensure that Exim is compiled with large file
6223 support, which makes it possible to handle log files that are bigger than
6226 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6227 instance) a domain was checked against a named list that involved a lookup,
6228 causing $domain_data to be set, then another domain was checked against the
6229 same list, then the first domain was re-checked, the value of $domain_data
6230 after the final check could be wrong. In particular, if the second check
6231 failed, it could be set empty. This bug probably also applied to
6234 41. The strip_trailing_dot option was not being applied to the address given
6235 with the -f command-line option.
6237 42. The code for reading a message's header from the spool was incrementing
6238 $received_count, but never initializing it. This meant that the value was
6239 incorrect (doubled) while delivering a message in the same process in which
6240 it was received. In the most common configuration of Exim, this never
6241 happens - a fresh exec is done - but it can happen when
6242 deliver_drop_privilege is set.
6244 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6245 it now includes up to 150 characters of the unexpected data in the log
6248 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6249 and building data strings. The size of both of these buffers was 10 000
6250 bytes - far larger than anybody would *ever* want, thought I. Needless to
6251 say, somebody hit the limit. I have increased the maximum line length to
6252 20 000 and the maximum data length of concatenated lines to 100 000. I have
6253 also fixed two bugs, because there was no checking on these buffers. Tsk,
6254 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6255 buffer is too small.
6257 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6258 lsearch lookups. Now it does.
6260 46. When parsing a route_list item in a manualroute router, a fixed-length
6261 buffer was used for the list of hosts. I made this 1024 bytes long,
6262 thinking that nobody would ever have a list of hosts that long. Wrong.
6263 Somebody had a whole pile of complicated expansion conditions, and the
6264 string was silently truncated, leading to an expansion error. It turns out
6265 that it is easier to change to an unlimited length (owing to other changes
6266 that have happened since this code was originally written) than to build
6267 structure for giving a limitation error. The length of the item that
6268 expands into the list of hosts is now unlimited.
6270 47. The lsearch lookup could not handle data where the length of text line was
6271 more than 4095 characters. Such lines were truncated, leading to shortened
6272 data being returned. It should now handle lines of any length.
6274 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6275 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6278 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6279 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6280 no longer happens in comment lines. A list of replacements is now placed
6281 at the head of all of the source files, except those whose only change is
6282 to replace PERL_COMMAND in the very first #! line.
6284 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6285 messages on the queue, with a bottom-up merge sort, using code contributed
6286 by Michael Haardt. This should make operations like -bp somewhat faster on
6287 large queues. It won't affect queue runners, except when queue_run_in_order
6290 51. Installed eximstats 1.31 in the distribution.
6292 52. Added support for SRV lookups to the dnslookup router.
6294 53. If an ACL referred to $message_body or $message_body_end, the value was not
6295 reset for any messages that followed in the same SMTP session.
6297 54. The store-handling optimization for building very long strings was not
6298 differentiating between the different store pools. I don't think this
6299 actually made any difference in practice, but I've tidied it.
6301 55. While running the routers to verify a sender address, $sender_address
6302 was still set to the sender address. This is wrong, because when routing to
6303 send a bounce to the sender, it would be empty. Therefore, I have changed
6304 it so that, while verifying a sender address, $sender_address is set to <>.
6305 (There is no change to what happens when verifying a recipient address.)
6307 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6308 target A or AAAA records (if not already returned) without resetting the
6309 qualify_single or search_parents options of the DNS resolver. These are
6310 inappropriate in this case because the targets of MX and SRV records must
6311 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6312 target that, when qualified, matched something in the local domain. These
6313 two options are now turned off when doing these lookups.
6315 57. It seems that at least some releases of Reiserfs (which does not have the
6316 concept of a fixed number of inodes) returns zero and not -1 for the
6317 number of available inodes. This interacted badly with check_spool_inodes,
6318 which assumed that -1 was the "no such thing" setting. What I have done is
6319 to check that the total number of inodes is greater than zero before doing
6320 the test of how many are available.
6322 58. When a "warn" ACL statement has a log_message modifier, the message is
6323 remembered, and not repeated. This is to avoid a lot of repetition when a
6324 message has many recipients that cause the same warning to be written.
6325 However, Exim was preserving the list of already written lines for an
6326 entire SMTP session, which doesn't seem right. The memory is now reset if a
6327 new message is started.
6329 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6330 debugging output unless log_rewrite was also set.
6332 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6333 of (int)(handle) when we know that handle contains (void *)(-1).
6335 61. The Exim daemon panic-logs an error return when it closes the incoming
6336 connection. However "connection reset by peer" seems to be common, and
6337 isn't really an error worthy of noting specially, so that particular error
6340 62. When Exim is trying to find all the local interfaces, it used to panic and
6341 die if the ioctl to get the interface flags failed. However, it seems that
6342 on at least one OS (Solaris 9) it is possible to have an interface that is
6343 included in the list of interfaces, but for which you get a failure error
6344 for this call. This happens when the interface is not "plumbed" into a
6345 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6346 failure of the "get flags" call assumes that the interface is down.
6348 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6349 makes life easier for people who are doing arithmetic on fields extracted
6350 from dates, where you often get leading zeros that should not be
6351 interpreted as octal.
6353 64. Added qualify_domain to the redirect router, to override the global
6356 65. If a pathologically long header line contained very many addresses (the
6357 report of this problem mentioned 10 000) and each of them was rewritten,
6358 Exim could use up a very large amount of memory. (It kept on making new
6359 copies of the header line as it rewrote, and never released the old ones.)
6360 At the expense of a bit more processing, the header rewriting function has
6361 been changed so that it no longer eats memory in this way.
6363 66. The generation of the Received: header has been moved from the time that a
6364 message starts to be received, to the time that it finishes. The timestamp
6365 in the Received: header should now be very close to that of the <= log
6366 line. There are two side-effects of this change:
6368 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6369 logged header lines no longer include the local Received: line, because
6370 it has not yet been created. The same applies to a copy of the message
6371 that is returned to a non-SMTP sender when a message is rejected.
6373 (b) When a filter file is tested using -bf, no additional Received: header
6374 is added to the test message. After some thought, I decided that this
6377 This change does not affect the value of $received_for. It is still set
6378 after address rewriting, but before local_scan() is called.
6380 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6382 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6383 gave an unhelpful panic error message, and a defer error. I have managed to
6384 change this behaviour so that it now rejects any supplied certificate,
6385 which seems right, as the list of acceptable certificates is empty.
6387 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6388 gave an unhelpful defer error. I have not managed to make this reject any
6389 supplied certificates, but the error message it gives is "no certificate
6390 supplied", which is not helpful.
6392 70. exigrep's output now also includes lines that are not associated with any
6393 message, but which match the given pattern. Implemented by a patch from
6394 Martin Sluka, which also tidied up the Perl a bit.
6396 71. Recipient callout verification, like sender verification, was using <> in
6397 the MAIL FROM command. This isn't really the right thing, since the actual
6398 sender may affect whether the remote host accepts the recipient or not. I
6399 have changed it to use the actual sender in the callout; this means that
6400 the cache record is now keyed on a recipient/sender pair, not just the
6401 recipient address. There doesn't seem to be a real danger of callout loops,
6402 since a callout by the remote host to check the sender would use <>.
6403 [SEE ABOVE: changed after hitting problems.]
6405 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6406 temporary errors. However, in the case of such a code being given after
6407 the end of a data transmission (i.e. after ".") Exim was failing to write
6408 a retry record for the message. (Yes, there was some broken host that was
6409 actually sending 8xx at this point.)
6411 73. An unknown lookup type in a host list could cause Exim to panic-die when
6412 the list was checked. (An example that provoked this was putting <; in the
6413 middle of a list instead of at the start.) If this happened during a DATA
6414 ACL check, a -D file could be left lying around. This kind of configuration
6415 error no longer causes Exim to die; instead it causes a defer error. The
6416 incident is still logged to the main and panic logs.
6418 74. Buglet left over from Exim 3 conversion. The message "too many messages
6419 in one connection" was written to the rejectlog but not the mainlog, except
6420 when address rewriting (yes!) was being logged.
6422 75. Added write_rejectlog option.
6424 76. When a system filter was run not as root (that is, when system_filter_user
6425 was set), the values of the $n variables were not being returned to the
6426 main process; thus, they were not subsequently available in the $sn
6429 77. Added +return_path_on_delivery log selector.
6431 78. A connection timeout was being treated differently from recipients deferred
6432 when testing hosts_max_try with a message that was older than the host's
6433 retry timeout. (The host should not be counted, thus allowing all hosts to
6434 be tried at least once before bouncing.) This may have been the cause of an
6435 occasionally reported bug whereby a message would remain on the queue
6436 longer than the retry timeout, but would be bounced if a delivery was
6437 forced. I say "may" because I never totally pinned down the problem;
6438 setting up timeout/retry tests is difficult. See also the next item.
6440 79. The ultimate address timeout was not being applied to errors that involved
6441 a combination of host plus message (for example, a timeout on a MAIL
6442 command). When an address resolved to a number of possible hosts, and they
6443 were not all tried for each delivery (e.g. because of hosts_max_try), a
6444 message could remain on the queue longer than the retry timeout.
6446 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6449 81. Fixed an obscure SMTP outgoing bug which required at least the following
6450 conditions: (a) there was another message waiting for the same server;
6451 (b) the server returned 5xx to all RCPT commands in the first message so
6452 that the message was not completed; (c) the server dropped the connection
6453 or gave a negative response to the RSET that Exim sends to abort the
6454 transaction. The observed case was a dropped connection after DATA that had
6455 been sent in pipelining mode. That is, the server had advertised PIPELINING
6456 but was not implementing it correctly. The effect of the bug was incorrect
6457 behaviour, such as trying another host, and this could lead to a crash.
6463 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6464 and daemon.c were passed as pointers to ints; they should have been
6465 pointers to socklen_t variables (which are typically unsigned ints).
6467 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6470 3. Fixed a really odd bug that affected only the testing scheme; patching a
6471 certain fixed string in the binary changed the value of another string that
6472 happened to be identical to the end of the original first string.
6474 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6475 name", it returns that address as the IP address. On some operating
6476 systems (e.g. Solaris), it also passes back the IP address string as the
6477 "host name". However, on others (e.g. Linux), it passes back an empty
6478 string. Exim wasn't checking for this, and was changing the host name to an
6479 empty string, assuming it had been canonicalized.
6481 5. Although rare, it is permitted to have more than one PTR record for a given
6482 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6483 all the names associated with an address, because they do in Solaris.
6484 However, it seems that they do not in Linux for data that comes from the
6485 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6486 I found this out when I moved to a new Linux workstation and tried to run
6487 the Exim test suite.
6489 To get round this problem I have changed the code so that it now does its
6490 own call to the DNS to look up PTR records when searching for a host name.
6491 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6492 addresses that are only in /etc/hosts are still found.
6494 This behaviour is, however, controlled by an option called host_lookup_
6495 order, which defaults to "bydns:byaddr". If people want to use the other
6496 order, or indeed, just use one or the other means of lookup, they can
6497 specify it in this variable.
6499 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6500 some operating systems, this comes back from gethostbyaddr() as an empty
6501 string, and this is what Exim used to test for. However, it seems that in
6502 other systems, "." is yielded. Exim now tests for this case too.
6504 7. The values of check_spool_space and check_log_space are now held internally
6505 as a number of kilobytes instead of an absolute number of bytes. If a
6506 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6507 kilobyte. This means that much larger values can be stored.
6509 8. Exim monitor: an attempt to get the action menu when not actually pointing
6510 at a message produces an empty menu entitled "No message selected". This
6511 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6512 no entries in it ("Shell widget menu has zero width and/or height"). So I
6513 have added a single, blank menu entry in this case.
6515 9. Added ${quote_local_part.
6517 10. MIME decoding is now applied to the contents of Subject: header lines when
6520 11. Now that a reference to $sender_host_address automatically causes a reverse
6521 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6522 host lookup before query-style lookups in lists that might use this
6523 variable. This has therefore been abolished, and the "net-" prefix is no
6524 longer necessary for query-style lookups.
6526 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6527 have been a typo for LFLAGS, so it has been changed.
6529 13. The install script calls Exim with "-C /dev/null" in order to find the
6530 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6531 to be output. However, since Exim outputs its version number before the
6532 error, it didn't break the script. It just looked ugly. I fixed this by
6533 always allowing "-C /dev/null" if the caller is root.
6535 14. Ignore overlarge ACL variable number when reading spool file - insurance
6536 against a later release with more variables having written the file.
6538 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6539 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6540 this, as well as the form without the "IPv6" on the front.
6542 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6543 OS/Makefile-Darwin file.
6545 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6546 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6548 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6549 variable. However, some OS use ints for inodes. I've added cast to long int
6550 to get rid of the compiler warning.
6552 19. I had forgotten to lock out "/../" in configuration file names when
6553 ALT_CONFIG_PREFIX was set.
6555 20. Routers used for verification do not need to specify transports. However,
6556 if such a router generated a host list, and callout was configured, Exim
6557 crashed, because it could not find a port number from the (non-existent)
6558 transport. It now assumes port 25 in this circumstance.
6560 21. Added the -t option to exigrep.
6562 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6563 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6564 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6565 them is set, LOOKUP_LSEARCH is forced.
6567 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6569 24. Added sender and host information to the "rejected by local_scan()" log
6570 line; previously there was no indication of these.
6572 25. Added .include_if_exists.
6574 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6575 Linux. It turns out that not all file systems support this. Apparently some
6576 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6577 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6578 not supported on the file descriptor, is now ignored when Exim is trying to
6579 sync a directory. This applies only to Linux.
6581 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6583 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6584 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6587 29. Added support for maildirsize files from supplied patch (modified a bit).
6589 30. The use of :fail: followed by an empty string could lead Exim to respond to
6590 sender verification failures with (e.g.):
6592 550 Verification failed for <xxx>
6593 550 Sender verify failed
6595 where the first response line was missing the '-' that indicates it is not
6596 the final line of the response.
6598 31. The loop for finding the name of the user that called Exim had a hardwired
6599 limit of 10; it now uses the value of finduser_retries, which is used for
6600 all other user lookups.
6602 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6605 33. Exim was neglecting to zero errno before one call of strtol() when
6606 expanding a string and expecting an integer value. On some systems this
6607 resulted in spurious "integer overflow" errors. Also, it was casting the
6608 result into an int without checking.
6610 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6611 did not work. The code looks as if it has *never* worked, though it appears
6612 to have been documented since at least release 1.62. I have made it work.
6614 35. The "timeout_DNS" error in retry rules, also documented since at least
6615 1.62, also never worked. As it isn't clear exactly what this means, and
6616 clearly it isn't a major issue, I have abolished the feature by treating it
6617 as "timeout", and writing a warning to the main and panic logs.
6619 36. The display of retry rules for -brt wasn't always showing the error code
6622 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6623 timeout_connect_A, timeout_connect_MX.
6625 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6626 to the empty sender.
6628 39. The daemon was not analysing the content of -oX till after it had closed
6629 stderr and disconnected from the controlling terminal. This meant that any
6630 syntax errors were only noted on the panic log, and the return code from
6631 the command was 0. By re-arranging the code a little, I've made the
6632 decoding happen first, so such errors now appear on stderr, and the return
6633 code is 1. However, the actual setting up of the sockets still happens in
6634 the disconnected process, so errors there are still only recorded on the
6637 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6638 connections (as happens on some IP stacks) was logged at start up time as
6639 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6640 it from "IPv6 and IPv4", which means that two separate sockets are being
6643 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6644 says whether AF_INET or AF_INET6 was passed as an argument.
6646 42. Exiwhat output was messed up when time zones were included in log
6649 43. Exiwhat now gives more information about the daemon's listening ports,
6650 and whether -tls-on-connect was used.
6652 44. The "port" option of the smtp transport is now expanded.
6654 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6655 silently ignored. Now an error message is written to the main and panic
6658 46. There's a new ACL modifier called "logwrite" which writes to a log file
6659 as soon as it is encountered.
6661 47. Added $local_user_uid and $local_user_gid at routing time.
6663 48. Exim crashed when trying to verify a sender address that was being
6666 49. Exim was recognizing only a space character after ".include". It now also
6667 recognizes a tab character.
6669 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6670 extracting the relevant information from the specification. The man page no
6671 longer contains scrambled data for the -d option, and I've added a section
6672 at the front about calling Exim under different names.
6674 51. Added "extra_headers" argument to the "mail" command in filter files.
6676 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6679 53. Installed eximstats 1.29.
6681 54. Added transport_filter_timeout as a generic transport option.
6683 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6684 Cc: header lines. This was required by RFC 822, but it not required by RFC
6687 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6688 incoming messages that did not have them. Now it does so only if the
6689 message originates locally, that is, if there is no associated remote host
6690 address. When Resent- header lines are present, this applies to the Resent-
6691 lines rather than the non-Resent- lines.
6693 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6694 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6696 58. Messages for configuration errors now include the name of the main
6697 configuration file - useful now that there may be more than one file in a
6698 list (.included file names were always shown).
6700 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6701 for those rare installations that do not start the daemon as root or run it
6702 setuid root. I've cut out the call to initgroups() if the daemon is not
6705 60. The Exim user and group can now be bound into the binary as text strings
6706 that are looked up at the start of Exim's processing.
6708 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6710 62. Added $mailstore_basename variable.
6712 63. Installed patch to sieve.c from Michael Haardt.
6714 64. When Exim failed to open the panic log after failing to open the main log,
6715 the original message it was trying to log was written to stderr and debug
6716 output, but if they were not available (the usual case in production), it
6717 was lost. Now it is written to syslog before the two lines that record the
6718 failures to open the logs.
6720 65. Users' Exim filters run in subprocesses under the user's uid. It is
6721 possible for a "deliver" command or an alias in a "personal" command to
6722 provoke an address rewrite. If logging of address rewriting is configured,
6723 this fails because the process is not running as root or exim. There may be
6724 a better way of dealing with this, but for the moment (because 4.30 needs
6725 to be released), I have disabled address rewrite logging when running a
6726 filter in a non-root, non-exim process.
6732 1. The buildconfig auxiliary program wasn't quoting the value set for
6733 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6734 not defined. This bug was masked in 4.22 by the effect that was fixed in
6737 2. Some messages that were rejected after a message id was allocated were
6738 shown as "incomplete" by exigrep. It no longer does this for messages that
6739 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6741 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6742 have allow_domain_literals set, the ID did not get logged in the <= line.
6743 Domain literals are now always recognized in Message-ID: header lines.
6745 4. The first argument for a ${extract expansion item is the key name or field
6746 number. Leading and trailing spaces in this item were not being ignored,
6747 causing some misleading effects.
6749 5. When deliver_drop_privilege was set, single queue runner processes started
6750 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6751 same command in the process it spins off) were not dropping privilege.
6753 6. When the daemon running as "exim" started a queue runner, it always
6754 re-executed Exim in the spun-off process. This is a waste of effort when
6755 deliver_drop_privilege is set. The new process now just calls the
6756 queue-runner function directly.
6762 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6765 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6766 ignored. Though the use of -oP was forcing the writing of a pid file, it
6767 was always written to the default place.
6769 3. If the message "no IP address found for host xxxx" is generated during
6770 incoming verification, it is now followed by identification of the incoming
6771 connection (so you can more easily find what provoked it).
6773 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6775 5. Added some features to "harden" Exim a bit more against certain attacks:
6777 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6778 be put in Local/Makefile. This is like the never_users runtime option,
6779 but it cannot be overridden. The default setting is "root".
6781 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6782 prefix string with which any file named in a -C command line option
6785 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6786 is retained for -C and -D only if the caller of Exim is root. Without
6787 it, the exim user may also use -C and -D and retain privilege.
6789 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6790 command line option is disabled.
6792 6. Macro names set by the -D option must start with an upper case letter, just
6793 like macro names defined in the configuration file.
6795 7. Added "dereference=" facility to LDAP.
6797 8. Two instances of the typo "uknown" in the source files are fixed.
6799 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6800 the Configure-Makefile script screwed up while processing it.
6802 10. Incorporated PCRE 4.4.
6804 11. The SMTP synchronization check was not operating right at the start of an
6805 SMTP session. For example, it could not catch a HELO sent before the client
6806 waited for the greeting. There is now a check for outstanding input at the
6807 point when the greeting is written. Because of the duplex, asynchronous
6808 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6809 way, but not yet received, when the check is performed.
6811 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6812 on TCP/IP sockets, because this apparently causes some broken clients to
6815 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6816 unchanged) from the Cygwin maintainer.
6818 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6819 was supported instead of testing for mbx. Effectively a typo.
6821 15. The spa authenticator server code was not checking that the input it
6822 received was valid base64.
6824 16. The debug output line for the "set" modifier in ACLs was not showing the
6825 name of the variable that was being set.
6827 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6829 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6830 lookup on its own. Something else was needed to trigger the lookup. For
6831 example, a match in host_lookup or the need for a host name in a host list.
6832 Now, if $sender_host_name is referenced and the host name has not yet been
6833 looked up, a lookup is performed. If the lookup fails, the variable remains
6834 empty, and $host_lookup_failed is set to "1".
6836 19. Added "eqi" as a case-independent comparison operator.
6838 20. The saslauthd authentication condition could segfault if neither service
6839 nor realm was specified.
6841 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6842 error message that was logged was misleading, and incoming SMTP
6843 connections were dropped. The message is now more accurate, and temporary
6844 errors are given to SMTP connections.
6846 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6847 (except RSET) with a 421 error, until QUIT is received. However, it was
6848 failing to send a response to QUIT.
6850 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6851 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6852 ACL is now run after the helo_try_verify_hosts code.
6854 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6855 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6856 case-independent, so other case variants are also recognized). Apparently
6857 some systems use these upper case variants.
6859 25. If more than two messages were waiting for the same host, and a transport
6860 filter was specified for the transport, Exim sent two messages over the
6861 same TCP/IP connection, and then failed with "socket operation on non-
6862 socket" when it tried to send the third.
6864 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6866 27. The extern definition of crypt16() in expand.c was not being excluded when
6867 the OS had its own crypt16() function.
6869 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6870 as a preferred synonym for return_size_limit, both as an option and as an
6873 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6875 30. Changed the default configuration ACL to relax the local part checking rule
6876 for addresses that are not in any local domains. For these addresses,
6877 slashes and pipe symbols are allowed within local parts, but the sequence
6878 /../ is explicitly forbidden.
6880 31. SPA server authentication was not clearing the challenge buffer before
6883 32. log_message in a "warn" ACL statement was writing to the reject log as
6884 well as to the main log, which contradicts the documentation and doesn't
6885 seem right (because no rejection is happening). So I have stopped it.
6887 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6888 However, I am unable to do any testing of this.
6890 34. Fixed an infelicity in the appendfile transport. When checking directories
6891 for a mailbox, to see if any needed to be created, it was accidentally
6892 using path names with one or more superfluous leading slashes; tracing
6893 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6895 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6896 contents are added to the log line that is written for every discarded
6897 recipient. (Previously a log_message setting was ignored.)
6899 36. The ${quote: operator now quotes the string if it is empty.
6901 37. The install script runs exim in order to find its version number. If for
6902 some reason other than non-existence or emptiness, which it checks, it
6903 could not run './exim', it was installing it with an empty version number,
6904 i.e. as "exim-". This error state is now caught, and the installation is
6907 38. An argument was missing from the function that creates an error message
6908 when Exim fails to connect to the socket for saslauthd authentication.
6909 This could cause Exim to crash, or give a corrupted message.
6911 39. Added isip, isip4, and isip6 to ${if conditions.
6913 40. The ACL variables $acl_xx are now saved with the message, and can be
6914 accessed later in routers, transports, and filters.
6916 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6917 strings in the file are not string-expanded.
6919 42. If a MAIL command specified a SIZE value that was too large to fit into an
6920 int variable, the check against message_size_limit failed. Such values are
6921 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6922 day this will have to be increased, but I don't think I want to be around
6923 when emails are that large.
6930 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6931 iconv() is not standard in FreeBSD.
6933 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6934 IPv6 enabled. The observed symptom was a segmentation fault on return from
6935 the function os_common_find_running_interfaces() in src/os.c.
6937 3. In the check_special_case() function in daemon.c I had used "errno" as an
6938 argument name, which causes warnings on some systems. This was basically a
6939 typo, since it was named "eno" in the comments!
6941 4. The code that waits for the clock to tick (at a resolution of some fraction
6942 of a second) so as to ensure message-id uniqueness was always waiting for
6943 at least one whole tick, when it could have waited for less. [This is
6944 almost certainly not relevant at current processor speeds, where it is
6945 unlikely to ever wait at all. But we try to future-proof.]
6947 5. The function that sleeps for a time interval that includes fractions of a
6948 second contained a race. It did not block SIGALRM between setting the
6949 timer, and suspending (a couple of lines later). If the interval was short
6950 and the sigsuspend() was delayed until after it had expired, the suspension
6951 never ended. On busy systems this could lead to processes getting stuck for
6954 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6955 process, before it forks any delivery processes. The open lookup caching
6956 mechanism meant that the open file or database connection was passed into
6957 the delivery process. The problem was that delivery processes always tidy
6958 up cached lookup data. This could cause a problem for the next delivery
6959 process started by the queue runner, because the external queue runner
6960 process does not know about the closure. So the next delivery process
6961 still has data in the lookup cache. In the case of a file lookup, there was
6962 no problem because closing a file descriptor in a subprocess doesn't affect
6963 the parent. However, if the lookup was caching a connection to a database,
6964 the connection was closed, and the second delivery process was likely to
6965 see errors such as "PGSQL: query failed: server closed the connection
6966 unexpectedly". The problem has been fixed by closing all cached lookups
6967 in a queue runner before running a delivery process.
6969 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6970 seem to have the "const" qualifier which it has on other OS. I've
6973 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6974 *of the same type* (client or server) with the same public name that an
6975 error should be diagnosed.
6977 9. When Exim looked up a host name for an IP address, but failed to find the
6978 original IP address when looking up the host name (a safety check), it
6979 output the message "<ip address> does not match any IP for NULL", which was
6980 confusing, to say the least. The bug was that the host name should have
6981 appeared instead of "NULL".
6983 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6984 user that is built into the binary, and the -C or -D options is used, root
6985 privilege is dropped before the configuration file is read. In addition,
6986 logging is switched to stderr instead of the normal log files. If the
6987 configuration then re-defines the Exim user, the unprivileged environment
6988 is probably not what is expected, so Exim logs a panic warning message (but
6991 However, if deliver_drop_privilege is set, the unprivileged state may well
6992 be exactly what is intended, so the warning has been cut out in that case,
6993 and Exim is allowed to try to write to its normal log files.
6999 1. smtp_return_error_details was not giving details for temporary sender
7000 or receiver verification errors.
7002 2. Diagnose a configuration error if two authenticators have the same public
7005 3. Exim used not to create the message log file for a message until the first
7006 delivery attempt. This could be confusing when incoming messages were held
7007 for policy or load reasons. The message log file is now created at the time
7008 the message is received, and an initial "Received" line is written to it.
7010 4. The automatically generated man page for command line options had a minor
7011 bug that caused no ill effects; however, a more serious problem was that
7012 the procedure for building the man page automatically didn't always
7013 operate. Consequently, release 4.20 contains an out-of-date version. This
7014 shouldn't happen again.
7016 5. When building Exim with embedded Perl support, the script that builds the
7017 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7018 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7020 6. The freeze_tell option was not being used for messages that were frozen on
7021 arrival, either by an ACL or by local_scan().
7023 7. Added the smtp_incomplete_transaction log selector.
7025 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7026 was accepting AUTH without a new EHLO.
7028 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7029 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7032 10. Logging of TCP/IP connections (when configured) now happens in the main
7033 daemon process instead of the child process, so that the TCP/IP connection
7034 count is more accurate (but it can never be perfect).
7036 11. The use of "drop" in a nested ACL was not being handled correctly in the
7037 outer ACL. Now, if condition failure induced by the nested "drop" causes
7038 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7039 or "require"), the connection is dropped.
7041 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7042 that yield "discard" can now be used with an "accept" or a "discard" verb,
7043 but an error is generated for any others (because I can't see a useful way
7044 to define what should happen).
7046 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7047 are now processed in the same way as lines in the Exim configuration file.
7048 In particular, continuation lines are supported.
7050 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7052 15. Added -ti meaning -t -i.
7054 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7055 domains, and warn by logging if others are found.
7057 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7058 returned from GIFCONF when Exim is trying to find the list of interfaces on
7059 a host. The code in os.c has been modified to copy each ifreq to an aligned
7060 structure in all cases.
7062 Also, in some cases, the returned ifreq's were being copied to a 'struct
7063 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7064 means the last couple of bytes of an IPv6 address could be chopped if the
7065 ifreq contained only a normal sockaddr (14 bytes storage).
7067 18. Named domain lists were not supported in the hosts_treat_as_local option.
7068 An entry such as +xxxx was not recognized, and was treated as a literal
7071 19. Ensure that header lines added by a DATA ACL are included in the reject log
7072 if the ACL subsequently rejects the message.
7074 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7075 MD5 (which is deprecated).
7077 21. When testing a filter file using -bf, Exim was writing a message when it
7078 took the sender from a "From " line in the message, but it was not doing so
7079 when it took $return_path from a Return-Path: header line. It now does.
7081 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7082 with a valid header line field name (a series of printing characters
7083 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7085 23. Changed "disc" in the source to "disk" to conform to the documentation and
7086 the book and for uniformity.
7088 24. Ignore Sendmail's -Ooption=value command line item.
7090 25. When execve() failed while trying to run a command in a pipe transport,
7091 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7092 could be confused with a return value of 69 from the command itself. This
7093 has been changed to 127, the value the shell returns if it is asked to run
7094 a non-existent command. The wording for the related log line suggests a
7095 non-existent command as the problem.
7097 26. If received_header_text expands to an empty string, do not add a Received:
7098 header line to the message. (Well, it adds a token one on the spool, but
7099 marks it "old" so that it doesn't get used or transmitted.)
7101 27. Installed eximstats 1.28 (addition of -nt option).
7103 28. There was no check for failure on the call to getsockname() in the daemon
7104 code. This can fail if there is a shortage of resources on the system, with
7105 ENOMEM, for example. A temporary error is now given on failure.
7107 29. Contrary to the C standard, it seems that in some environments, the
7108 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7109 program. Exim now does this explicitly; it affects the formatting of
7110 timestamps using strftime().
7112 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7113 complaints. I've now initialized all the variables, to avoid this.
7115 32. Header lines added by a system filter were not being "seen" during
7116 transport-time rewrites.
7118 33. The info_callback() function passed to OpenSSL is set up with type void
7119 (*)(SSL *, int, int), as described somewhere. However, when calling the
7120 function (actually a macro) that sets it up, the type void(*)() is
7121 expected. I've put in a cast to prevent warnings from picky compilers.
7123 34. If a DNS black list lookup found a CNAME record, but there were no A
7124 records associated with the domain it pointed at, Exim crashed.
7126 35. If a DNS black list lookup returned more than one A record, Exim ignored
7127 all but the first. It now scans all returned addresses if a particular IP
7128 value is being sought. In this situation, the contents of the
7129 $dnslist_value variable are a list of all the addresses, separated by a
7132 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7133 to accept a host name and all its aliases if the forward lookup for any of
7134 them yielded the IP address of the incoming connection. Now it accepts only
7135 those names whose forward lookup yields the correct IP address. Any other
7136 names are discarded. This closes a loophole whereby a rogue DNS
7137 administrator could create reverse DNS records to break through a
7138 wildcarded host restriction in an ACL.
7140 37. If a user filter or a system filter that ran in a subprocess used any of
7141 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7142 the wrong values were passed to the pipe command ($thisaddress had the
7143 value of $0, $0 had the value of $1, etc). This bug was introduced by
7144 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7146 38. Improved the line breaking for long SMTP error messages from ACLs.
7147 Previously, if there was no break point between 40 and 75 characters, Exim
7148 left the rest of the message alone. Two changes have been made: (a) I've
7149 reduced the minimum length to 35 characters; (b) if it can't find a break
7150 point between 35 and 75 characters, it looks ahead and uses the first one
7151 that it finds. This may give the occasional overlong line, but at least the
7152 remaining text gets split now.
7154 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7155 file descriptors might be low, and that setting 1000 would always raise it.
7156 It turns out that in some environments, the limit is already over 1000 and
7157 that lowering it causes trouble. So now Exim takes care not to decrease it.
7159 40. When delivering a message, the value of $return_path is set to $sender_
7160 address at the start of routing (routers may change the value). By an
7161 oversight, this default was not being set up when an address was tested by
7162 -bt or -bv, which affected the outcome if any router or filter referred to
7165 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7166 log only when "message" or "log_message" are set. However, if one of the
7167 conditions was an address verification, or a call to a nested ACL, the
7168 messages generated by the underlying test were being passed through. This
7169 no longer happens. The underlying message is available in $acl_verify_
7170 message for both "message" and "log_message" expansions, so it can be
7171 passed through if needed.
7173 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7174 new expansion $bh_ to give the encoded byte string without charset
7175 translation. Translation happens only if iconv() is available; HAVE_ICONV
7176 indicates this at build time. HEADERS_CHARSET gives the charset to
7177 translate to; headers_charset can change it in the configuration, and
7178 "headers charset" can change it in an individual filter file.
7180 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7181 that creates RFC 2047 encoded "words" labels them as that charset instead
7182 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7183 expansion operator; (ii) when Exim creates a From: line for a local
7184 message; (iii) when a header line is rewritten to include a "phrase" part.
7186 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7187 buggy, causing it to skip the first lines of messages whose message ID
7188 ended in 'D'. This would not have bitten before Exim release 4.14, because
7189 message IDs were unlikely to end in 'D' before then. The effect was to have
7190 incorrect size information for certain domains.
7192 45. #include "config.h" was missing at the start of the crypt16.c module. This
7193 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7196 46. If there was a timeout during a "random" callout check, Exim treated it as
7197 a failure of the random address, and carried on sending RSET and the real
7198 address. If the delay was just some slowness somewhere, the response to the
7199 original RCPT would be taken as a response to RSET and so on, causing
7200 mayhem of various kinds.
7202 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7203 when I implemented it. It didn't allow for the fact that some option values
7204 may legitimately be negative (e.g. size_addition), and it didn't even do
7205 the right test for positive values.
7207 48. Domain names in DNS records are case-independent. Exim always looks them up
7208 in lower case. Some resolvers return domain names in exactly the case they
7209 appear in the zone file, that is, they may contain uppercase letters. Not
7210 all resolvers do this - some return always lower case. Exim was treating a
7211 change of case by a resolver as a change of domain, similar to a widening
7212 of a domain abbreviation. This triggered its re-routing code and so it was
7213 trying to route what was effectively the same domain again. This normally
7214 caused routing to fail (because the router wouldn't handle the domain
7215 twice). Now Exim checks for this case specially, and just changes the
7216 casing of the domain that it ultimately uses when it transmits the message
7219 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7222 50. If a filter generated a file delivery with a non-absolute name (possible if
7223 no home directory exists for the router), the forbid_file option was not
7226 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7227 the existing equality matching.
7229 52. Exim was using ints instead of ino_t variables in some places where it was
7230 dealing with inode numbers.
7232 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7233 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7234 called TMPDIR, and if it finds it is different, it changes its value.
7236 54. The smtp_printf() function is now made available to local_scan() so
7237 additional output lines can be written before returning. There is also an
7238 smtp_fflush() function to enable the detection of a dropped connection.
7239 The variables smtp_input and smtp_batched_input are exported to
7242 55. Changed the default runtime configuration: the message "Unknown user"
7243 has been removed from the ACL, and instead placed on the localuser router,
7244 using the cannot_route_message feature. This means that any verification
7245 failures that generate their own messages won't get overridden. Similarly,
7246 the "Unrouteable address" message that was in the ACL for unverifiable
7247 relay addresses has also been removed.
7249 56. Added hosts_avoid_esmtp to the smtp transport.
7251 57. The exicyclog script was not checking for the esoteric option
7252 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7253 will work only if exicyclog is run under the appropriate euid.
7255 58. Following a discussion on the list, the rules by which Exim recognises line
7256 endings on incoming messages have been changed. The -dropcr and drop_cr
7257 options are now no-ops, retained only for backwards compatibility. The
7258 following line terminators are recognized: LF CRLF CR. However, special
7259 processing applies to CR:
7261 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7262 nor a local message in the state where . is a terminator.
7264 (ii) If a bare CR is encountered in a header line, an extra space is added
7265 after the line terminator so as not to end the header. The reasoning
7266 behind this is that bare CRs in header lines are most likely either
7267 to be mistakes, or people trying to play silly games.
7269 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7270 was being incorrectly given as 18 bytes larger than it should have been.
7271 This is a VOB (very old bug).
7273 60. This may never have affected anything current, but just in case it has:
7274 When the local host is found other than at the start of a list of hosts,
7275 the local host, those with the same MX, and any that follow, are discarded.
7276 When the list in question was part of a longer list of hosts, the following
7277 hosts (not currently being processed) were also being discarded. This no
7278 longer happens. I'm not sure if this situation could ever has previously
7281 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7284 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7285 header. This is something that is recommended in a new Internet Draft, and
7286 is something that is documented as being done by Sendmail. There are two
7287 possible values. For messages generated by the autoreply transport, Exim
7290 Auto-Submitted: auto-replied
7292 whereas for all other generated messages (e.g. bounces) it adds
7294 Auto-Submitted: auto-generated
7296 63. The "personal" condition in filters now includes a test for the
7297 Auto-Submitted: header. If it contains the string "auto-" the message it
7298 not considered personal.
7300 64. Added rcpt_include_affixes as a generic transport option.
7302 65. Added queue_only_override (default true).
7304 66. Added the syslog_duplication option.
7306 67. If what should have been the first header line of a message consisted of
7307 a space followed by a colon, Exim was mis-interpreting it as a header line.
7308 It isn't of course - it is syntactically invalid and should therefore be
7309 treated as the start of the message body. The misbehaviour could have
7310 caused a number of strange effects, including loss of data in subsequent
7311 header lines, and spool format errors.
7313 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7314 client host had authenticated. This control can now be exercised by an ACL
7315 for more flexibility.
7317 69. By default, callouts do not happen when testing with -bh. There is now a
7318 variant, -bhc, which does actually run the callout code, including
7319 consulting and updating the callout cache.
7321 70. Added support for saslauthd authentication, courtesy of Alexander
7324 71. If statvfs() failed on the spool or log directories while checking their
7325 size for availability, Exim confusingly gave the error "space shortage".
7326 Furthermore, in debugging mode it crashed with a floating point exception.
7327 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7328 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7329 serious problem, Exim now writes to the main and panic logs when this
7330 happens, with details of the failure. It then refuses to accept the
7331 incoming message, giving the message "spool directory problem" or "log
7332 directory problem" with a 421 code for SMTP messages.
7334 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7335 0, 1, and 2 exist, because some OS complain for execs without them (see
7336 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7337 descriptors. However, the code omitted to check that the open succeeded,
7338 causing mysterious errors if for some reason the permissions on /dev/null
7339 got screwed. Now Exim writes a message to the main and panic logs, and
7340 bombs out if it can't open /dev/null.
7342 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7343 interact so that it is all more flexible. It is supposed to remain
7344 backwards compatible. Also added extra_local_interfaces.
7346 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7347 to bomb out with an assertion failure - to the client this appears as a
7348 connection drop. This problem occurs in the part of the code that was taken
7349 from the Samba project. Fortunately, the assertion is in a very simple
7350 function, so I have fixed this by reproducing the function inline in the
7351 one place where it is called, and arranging for authentication to fail
7352 instead of killing the process with assert().
7354 75. The SPA client code was not working when the server requested OEM rather
7355 than Unicode encoding.
7357 76. Added code to make require_files with a specific uid setting more usable in
7358 the case where statting the file as root fails - usually a non-root-mounted
7359 NFS file system. When this happens and the failure is EACCES, Exim now
7360 forks a subprocess and does the per-uid checking as the relevant uid.
7362 77. Added process_log_path.
7364 78. If log_file_path was not explicitly set, a setting of check_log_space or
7365 check_log_inodes was ignored.
7367 79. If a space check for the spool or log partitions fails, the incident is now
7368 logged. Of course, in the latter case the data may get lost...
7370 80. Added the %p formatting code to string_format() so that it can be used to
7371 print addresses in debug_print(). Adjusted all the address printing in the
7372 debugging in store.c to use %p rather than %d.
7374 81. There was a concern that a line of code in smtp_in.c could overflow a
7375 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7376 initially expressed, the concern was not well-founded, because trailing
7377 spaces are removed early. However, if the trailing spaces were followed by
7378 a NULL, they did not get removed, so the overflow was possible. Two fixes
7381 (a) I re-wrote the offending code in a cleaner fashion.
7382 (b) If an incoming SMTP command contains a NULL character, it is rejected
7385 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7386 runs initgroups(), so that if the Exim user is in any additional groups,
7387 they will be used during message reception.
7393 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob