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
34 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
35 the OS reports them interleaved with other addresses.
37 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
38 used both for input and for a verify callout, both encrypted, SMTP
39 responses being sent by the server could be lost. This resulted in
40 dropped connections and sometimes bounces generated by a peer sending
43 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
44 string. Previously it was possible to cause undefined behaviour in a
45 library routine (usually a crash). Found by "zerons".
52 JH/01 Remove code calling the customisable local_scan function, unless a new
53 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
55 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
56 non-signal-safe functions being used.
58 JH/03 Bug 2269: When presented with a received message having a stupidly large
59 number of DKIM-Signature headers, disable DKIM verification to avoid
60 a resource-consumption attack. The limit is set at twenty.
62 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
63 report of oldest_pass in ${authres } in consequence, and separate out
64 some descriptions of reasons for verification fail.
66 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
67 files in the spool were present and unlocked. A queue-runner could spot
68 them, resulting in a duplicate delivery. Fix that by doing the unlock
69 after the unlink. Investigation by Tim Stewart. Take the opportunity to
70 add more error-checking on spoolfile handling while that code is being
73 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
74 No known attacks, no CVE, this is defensive hardening.
76 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
77 a queue-runner could start a delivery while other operations were ongoing.
78 Cutthrough delivery was a common victim, resulting in duplicate delivery.
79 Found and investigated by Tim Stewart. Fix by using the open message data
80 file handle rather than opening another, and not locally closing it (which
81 releases a lock) for that case, while creating the temporary .eml format
82 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
84 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
85 $sender_verify_failure/$recipient_verify_failure to "random".
87 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
90 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
91 Previously this would segfault.
93 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
96 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
97 like zero, since the resolver should be doing this for us, But we need one
98 as a CNAME but no MX presence gets the CNAME returned; we need to check
99 that doesn't point to an MX to declare it "no MX returned" rather than
100 "error, loop". A new main option is added so the older capability of
101 following some limited number of chain links is maintained.
103 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
105 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
106 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
107 now-deprecated earlier definitions used only specified the range up to TLS
108 1.2 (in the older-version library docs).
110 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
112 JH/15 Rework TLS client-side context management. Stop using a global, and
113 explicitly pass a context around. This enables future use of TLS for
114 connections to service-daemons (eg. malware scanning) while a client smtp
115 connection is using TLS; with cutthrough connections this is quite likely.
117 JH/16 Fix ARC verification to do AS checks in reverse order.
119 JH/17 Support a "tls" option on the ${readsocket } expansion item.
121 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
122 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
123 Previously the "utf8" would be re-prepended for every additional message.
125 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
126 Previously thery were accepted, resulting in issues when attempting to
127 forward messages to a non-supporting MTA.
129 PP/02 Let -n work with printing macros too, not just options.
131 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
132 one parent address was copied, and bogus data was used at delivery-logging
133 time. Either a crash (after delivery) or bogus log data could result.
134 Discovery and analysis by Tim Stewart.
136 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
137 Previously if the string ended mid-character, we did not insert the
138 promised '?' replacement.
140 PP/04 Documentation: current string operators work on bytes, not codepoints.
142 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
143 should pack well giving a smaller memory footprint so better caching and
144 therefore performance. Group the declarations where this can't be done so
145 that the byte-sized flag variables are not interspersed among pointer
146 variables, giving a better chance of good packing by the compiler.
148 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
149 non-null, to avoid issues with sites running BATV. Previously reports were
150 sent with an empty envelope sender so looked like bounces.
152 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
153 The ignore_error flag wasn't being returned from the filter subprocess so
154 was not set for later routers. Investigation and fix by Matthias Kurz.
156 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
157 and a msg:complete for the whole, when a message is manually removed using
158 -Mrm. Developement by Matthias Kurz, hacked on by JH.
160 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
161 a "Gnu special" function, asprintf() in the DB utility binary builds; I
162 hope that is portable enough.
164 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
165 requiring a known-CA anchor certificate; make it now rely entirely on the
166 TLSA as an anchor. Checking the name on the leaf cert against the name
167 on the A-record for the host is still done for TA (but not for EE mode).
169 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
170 included in delivery lines for non-proxied connections, when compiled with
171 SUPPORT_SOCKS and running with proxy logging enabled.
173 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
174 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
175 move the existing event to fire before the normal logging of message
176 failure so that custom logging is bracketed by normal logging.
178 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
179 msg:fail:internal event. Developement by Matthias Kurz.
181 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
182 far too small for todays use of crypto signatures stored there. Go all
183 the way to the max DNS message size of 64kB, even though this might be
184 overmuch for IOT constrained device use.
186 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
187 copy a string over itself. The library routine is documented as not
188 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
190 JH/32 For main options check_spool_space and check_inode_space, where the
191 platform supports 64b integers, support more than the previous 2^31 kB
192 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
193 the previous G, M, k.
195 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
196 $authenticated_fail_id variable on authentication failure. Previously
199 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
200 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
201 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
202 GNUTLS_SEC_PARAM_MEDIUM.
204 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
205 side. Previously we would continue as if no SNI had been received.
207 JH/36 Harden the handling of string-lists. When a list consisted of a sole
208 "<" character, which should be a list-separator specification, we walked
209 off past the nul-terimation.
211 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
212 causes) even when the retry time is not yet met. Previously they were
213 not, meaning that when (say) an account was over-quota and temp-rejecting,
214 and multiple senders' messages were queued, only one sender would get
215 notified on each configured delay_warning cycle.
217 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
219 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
220 cipher-suites, an error can be left on the stack even for a succeeding
221 accept; this results in impossible error messages when a later operation
224 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
225 return error codes indicating retry. Under TLS1.3 this becomes required.
227 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
228 it only wrote the new authenticators, resulting in a lack of tracking of
229 peer changes of ESMTP extensions until the next cache flush.
231 JH/41 Fix the loop reading a message header line to check for integer overflow,
232 and more-often against header_maxsize. Previously a crafted message could
233 induce a crash of the recive process; now the message is cleanly rejected.
235 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
236 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
242 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
243 When redis_servers is set to a list of > 1 element, and the Redis servers
244 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
245 case of MOVED into a DEFER case instead, thus moving the query onto the
246 next server in the list. For a cluster of N elements, all N servers must
247 be defined in redis_servers.
249 GF/02 Catch and remove uninitialized value warning in exiqsumm
250 Check for existence of @ARGV before looking at $ARGV[0]
252 JH/01 Replace the store_release() internal interface with store_newblock(),
253 which internalises the check required to safely use the old one, plus
254 the allocate and data copy operations duplicated in both (!) of the
255 extant use locations.
257 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
258 modifier. This matches the restriction on the commandline.
260 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
261 Previously only the last row was returned.
263 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
264 we assumed that tags in the header were well-formed, and parsed the
265 element content after inspecting only the first char of the tag.
266 Assumptions at that stage could crash the receive process on malformed
269 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
270 While running the DKIM ACL we operate on the Permanent memory pool so that
271 variables created with "set" persist to the DATA ACL. Also (at any time)
272 DNS lookups that fail create cache records using the Permanent pool. But
273 expansions release any allocations made on the current pool - so a dnsdb
274 lookup expansion done in the DKIM ACL releases the memory used for the
275 DNS negative-cache, and bad things result. Solution is to switch to the
276 Main pool for expansions.
277 While we're in that code, add checks on the DNS cache during store_reset,
278 active in the testsuite.
279 Problem spotted, and debugging aided, by Wolfgang Breyha.
281 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
282 When none of the hosts presented to a transport match an already-open
283 connection, close it and proceed with the list. Previously we would
284 queue the message. Spotted by Lena with Yahoo, probably involving
287 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
288 Previously a spurious "250 OK id=" response was appended to the proper
291 JH/08 The "support for" informational output now, which built with Content
292 Scanning support, has a line for the malware scanner interfaces compiled
293 in. Interface can be individually included or not at build time.
295 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
296 by the template makefile "src/EDITME". The "STREAM" support for an older
297 ClamAV interface method is removed.
299 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
300 rows affected is given instead).
302 JH/11 The runtime Berkeley DB library version is now additionally output by
303 "exim -d -bV". Previously only the compile-time version was shown.
305 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
306 SMTP connection. Previously, when one had more receipients than the
307 first, an abortive onward connection was made. Move to full support for
308 multiple onward connections in sequence, handling cutthrough connection
309 for all multi-message initiating connections.
311 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
312 routers. Previously, a multi-recipient message would fail to match the
313 onward-connection opened for the first recipient, and cause its closure.
315 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
316 a timeout on read on a GnuTLS initiating connection, resulting in the
317 initiating connection being dropped. This mattered most when the callout
318 was marked defer_ok. Fix to keep the two timeout-detection methods
321 JH/15 Relax results from ACL control request to enable cutthrough, in
322 unsupported situations, from error to silently (except under debug)
323 ignoring. This covers use with PRDR, frozen messages, queue-only and
326 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
328 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
329 metadata, resulting in a crash in free().
331 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
332 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
333 Broken also in d185889f4, with init system revamp.
335 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
336 Previously we abruptly closed the connection after reading a malware-
337 found indication; now we go on to read the "scan ok" response line,
340 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
341 ACL. Previously, a crash would result.
343 JH/19 Speed up macro lookups during configuration file read, by skipping non-
344 macro text after a replacement (previously it was only once per line) and
345 by skipping builtin macros when searching for an uppercase lead character.
347 JH/20 DANE support moved from Experimental to mainline. The Makefile control
348 for the build is renamed.
350 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
351 was allocated for every new TLS startup, meaning one per message. Fix
352 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
354 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
355 reported the original. Fix to report (as far as possible) the ACL
356 result replacing the original.
358 JH/23 Fix memory leak during multi-message connections using STARTTLS under
359 OpenSSL. Certificate information is loaded for every new TLS startup,
360 and the resources needed to be freed.
362 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
364 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
367 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
368 DATA response info to the (existing) per-recipient response info for
369 the "C=" log element. It can have useful tracking info from the
370 destination system. Patch from Simon Arlott.
372 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
373 length value. Previously this would segfault.
375 HS/02 Support Avast multiline protoocol, this allows passing flags to
376 newer versions of the scanner.
378 JH/28 Ensure that variables possibly set during message acceptance are marked
379 dead before release of memory in the daemon loop. This stops complaints
380 about them when the debug_store option is enabled. Discovered specifically
381 for sender_rate_period, but applies to a whole set of variables.
382 Do the same for the queue-runner and queue-list loops, for variables set
383 from spool message files. Do the same for the SMTP per-message loop, for
384 certain variables indirectly set in ACL operations.
386 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
387 as a multi-recipient message from a mailinglist manager). The coding had
388 an arbitrary cutoff number of characters while checking for more input;
389 enforced by writing a NUL into the buffer. This corrupted long / fast
390 input. The problem was exposed more widely when more pipelineing of SMTP
391 responses was introduced, and one Exim system was feeding another.
392 The symptom is log complaints of SMTP syntax error (NUL chars) on the
393 receiving system, and refused recipients seen by the sending system
394 (propating to people being dropped from mailing lists).
395 Discovered and pinpointed by David Carter.
397 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
398 replaced by the ${authresults } expansion.
400 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
402 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
403 allows proper process termination in container environments.
405 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
406 Previously the "final dot" had a newline after it; ensure it is CR,LF.
408 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
409 and "err_perm", deprecated since 4.83 when the RFC-defined words
410 "temperror" and "permerror" were introduced.
412 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
413 transport-filters or DKIM-signing. The restriction was lost in the
414 consolidation of verify-callout and delivery SMTP handling.
415 Extend the restriction to also cover ARC-signing.
417 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
418 in defer=pass mode supply a 450 to the initiator. Previously the message
421 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
422 tls_require_ciphers is used as before.
424 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
425 "pass_unscanned". Only tmpfails from the scanner are written to
426 the paniclog, as they may require admin intervention (permission
427 denied, license issues). Other scanner errors (like decompression
428 bombs) do not cause a paniclog entry.
430 JH/36 Fix reinitialisation of DKIM logging variable between messages.
431 Previously it was possible to log spurious information in receive log
434 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
435 triggered odd behaviour from Outlook Express clients.
437 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
440 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
441 since the IETF WG has not yet settled on that versus the original
442 "bare" representation.
444 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
445 Previously the millisecond value corrupted the output.
446 Fix also for syslog_pid=no and log_selector +pid, for which the pid
447 corrupted the output.
453 JH/01 Rework error string handling in TLS interface so that the caller in
454 more cases is responsible for logging. This permits library-sourced
455 string to be attached to addresses during delivery, and collapses
456 pairs of long lines into single ones.
458 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
459 during configuration. Wildcards are allowed and expanded.
461 JH/02 Rework error string handling in DKIM to pass more info back to callers.
462 This permits better logging.
464 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
465 do not close it down and have the child transport start it up again on
466 the passed-on TCP connection. Instead, proxy the child (and any
467 subsequent ones) for TLS via a unix-domain socket channel. Logging is
468 affected: the continued delivery log lines do not have any DNSSEC, TLS
469 Certificate or OCSP information. TLS cipher information is still logged.
471 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
472 identical IP addresses on different listening ports. Will also affect
475 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
476 add noisy ifdef guards to special-case this sillyness.
477 Patch from Bernd Kuhls.
479 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
480 than 255 are no longer allowed.
482 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
483 Disable the session-cache too, which might reduce our load. Since we
484 currrectly use a new context for every connection, both as server and
485 client, there is no benefit for these.
486 GnuTLS appears to not support tickets server-side by default (we don't
487 call gnutls_session_ticket_enable_server()) but client side is enabled
488 by default on recent versions (3.1.3 +) unless the PFS priority string
491 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
492 <https://reproducible-builds.org/specs/source-date-epoch/>.
494 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
495 the check for any unsuccessful recipients did not notice the limit, and
496 erroneously found still-pending ones.
498 JH/08 Pipeline CHUNKING command and data together, on kernels that support
499 MSG_MORE. Only in-clear (not on TLS connections).
501 JH/09 Avoid using a temporary file during transport using dkim. Unless a
502 transport-filter is involved we can buffer the headers in memory for
503 creating the signature, and read the spool data file once for the
504 signature and again for transmission.
506 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
507 4.77 as the kernel support then wasn't solid, having issues in 64bit
508 mode. Now, it's been long enough. Add support for FreeBSD also.
510 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
511 case where the routing stage had gathered several addresses to send to
512 a host before calling the transport for the first, we previously failed
513 to close down TLS in the old transport process before passing the TCP
514 connection to the new process. The new one sent a STARTTLS command
515 which naturally failed, giving a failed delivery and bloating the retry
516 database. Investigation and fix prototype from Wolfgang Breyha.
518 JH/12 Fix check on SMTP command input synchronisation. Previously there were
519 false-negatives in the check that the sender had not preempted a response
520 or prompt from Exim (running as a server), due to that code's lack of
521 awareness of the SMTP input buffering.
523 PP/04 Add commandline_checks_require_admin option.
524 Exim drops privileges sanely, various checks such as -be aren't a
525 security problem, as long as you trust local users with access to their
526 own account. When invoked by services which pass untrusted data to
527 Exim, this might be an issue. Set this option in main configuration
528 AND make fixes to the calling application, such as using `--` to stop
531 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
532 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
533 responses to those, into a single TLS record each way (this usually means
534 a single packet). As a side issue, smtp_enforce_sync now works on TLS
537 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
538 affects you only if you're dancing at the edge of the param size limits.
539 If you are, and this message makes sense to you, then: raise the
540 configured limit or use OpenSSL 1.1. Nothing we can do for older
543 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
544 cmdline element to get the documented default one. Previously it was
547 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
548 are unsuable for non-message-specific reasons - eg. connection timeout,
549 banner-time rejection.
551 JH/16 Fix logging of delivery remote port, when specified by router, under
554 PP/06 Repair manualroute's ability to take options in any order, even if one
555 is the name of a transport.
558 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
560 JH/17 Change the list-building routines interface to use the expanding-string
561 triplet model, for better allocation and copying behaviour.
563 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
564 Previously it was constructed the first time a possibly-matching string
565 was met in the configuration file input during startup; now it is done
568 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
569 compatible one, to avoid the (poorly documented) possibility of a config
570 file in the working directory redirecting the DB files, possibly correpting
571 some existing file. CVE-2017-10140 assigned for BDB.
573 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
574 cache-hot. Previously, although the result was properly cached, the
575 initial verify call returned a defer.
577 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
578 the main verify for receipient in uncached-mode.
580 JH/22 Retire historical build files to an "unsupported" subdir. These are
581 defined as "ones for which we have no current evidence of testing".
583 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
584 if present. Previously it was ignored.
586 JH/24 Start using specified-initialisers in C structure init coding. This is
587 a C99 feature (it's 2017, so now considered safe).
589 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
590 if was a fixed-sized field and bitmask ops via macros; it is now more
593 PP/07 GitHub PR 56: Apply MariaDB build fix.
594 Patch provided by Jaroslav Škarvada.
596 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
597 during Coverity cleanups [4.87 JH/47]
598 Diagnosis and fix provided by Michael Fischer v. Mollard.
600 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
601 the right size to place the terminating semicolon on its own folded
602 line, the header hash was calculated to an incorrect value thanks to
603 the (relaxed) space the fold became.
605 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
606 and confused the parent.
608 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
609 which could crash as a result. This could lead to undeliverable messages.
611 JH/28 Logging: "next input sent too soon" now shows where input was truncated
614 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
615 matters on fast-turnover and PID-randomising systems, which were getting
616 out-of-order delivery.
618 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
619 a possibly-overlapping copy. The symptom was that "Remote host closed
620 connection in response to HELO" was logged instead of the actual 4xx
623 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
624 Previously only that bufferd was discarded, resulting in SYMTP command
627 JH/32 DKIM: when a message has multiple signatures matching an identity given
628 in dkim_verify_signers, run the dkim acl once for each. Previously only
629 one run was done. Bug 2189.
631 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
632 "panic the current process" to "deliberately defer". The panic log is
633 still written with the problem list name; the mail and reject logs now
634 get a temp-reject line for the message that was being handled, saying
635 something like "domains check lookup or other defer". The SMTP 451
636 message is still "Temporary local problem".
638 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
639 A crafted sequence of BDAT commands could result in in-use memory beeing
640 freed. CVE-2017-16943.
642 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
643 from SMTP input. Previously it was always done; now only done for DATA
644 and not BDAT commands. CVE-2017-16944.
646 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
647 to the message (such as an overlong header line). Previously this was
648 not done and we did not exit BDAT mode. Followon from the previous item
649 though a different problem.
655 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
656 than -2003 did; needs libidn2 in addition to libidn.
658 JH/02 The path option on a pipe transport is now expanded before use.
660 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
661 Patch provided by "Björn", documentation fix added too.
663 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
664 missing a wire-to-host endian conversion.
666 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
667 close after a BDAT command line could be taken as a following command,
668 giving a synch failure. Fix by only checking for synch immediately
669 before acknowledging the chunk.
671 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
672 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
673 macro. Patches provided by Josh Soref.
675 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
676 Previously we did not; the RFC seems ambiguous and VRFY is not listed
677 by IANA as a service extension. However, John Klensin suggests that we
680 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
681 the dkim code may be unix-mode line endings rather than smtp wire-format
682 CRLF, so prepend a CR to any bare LF.
684 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
685 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
687 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
688 the first were themselves being wrongly included in the feed into dkim
689 processing; with most chunk sizes in use this resulted in an incorrect
690 body hash calculated value.
692 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
693 DKIM signature block, for verification. Although advised against by
694 standards it is specifically not ruled illegal.
696 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
698 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
699 missing a body hash (the bh= tag).
701 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
702 It seems that HAProxy sends the Proxy Protocol information in clear and
703 only then does a TLS startup, so do the same.
705 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
706 TCP connections (such as for Spamd) unless the daemon successfully set
707 Fast Open mode on its listening sockets. This fixes breakage seen on
708 too-old kernels or those not configured for Fast Open, at the cost of
709 requiring both directions being enabled for TFO, and TFO never being used
710 by non-daemon-related Exim processes.
712 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
713 endings, at least on the first header line. Try to canonify any that get
714 past that check, despite the cost.
716 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
717 now limited to an arbitrary five deep, while parsing addresses with the
718 strip_excess_angle_brackets option enabled.
720 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
721 instead leave the unprompted TLS handshake in socket buffer for the
722 TLS library to consume.
724 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
726 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
728 JH/16 Drop variables when they go out of scope. Memory management drops a whole
729 region in one operation, for speed, and this leaves assigned pointers
730 dangling. Add checks run only under the testsuite which checks all
731 variables at a store-reset and panics on a dangling pointer; add code
732 explicitly nulling out all the variables discovered. Fixes one known
733 bug: a transport crash, where a dangling pointer for $sending_ip_address
734 originally assigned in a verify callout, is re-used.
736 PP/06 Drop '.' from @INC in various Perl scripts.
738 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
740 PP/08 Reduce a number of compilation warnings under clang; building with
741 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
742 should be warning-free.
744 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
746 HS/01 Fix portability problems introduced by PP/08 for platforms where
747 realloc(NULL) is not equivalent to malloc() [SunOS et al].
749 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
750 chunk. This allows us to accept broken chunked messages. We need a more
751 general solution here.
753 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
754 already-broken messages in the queue.
756 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
758 JH/19 Fix reference counting bug in routing-generated-address tracking.
764 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
765 supports it and a size is available (ie. the sending peer gave us one).
767 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
768 years of being deprecated). The replacements are the ACLs
769 acl_smtp_mime and acl_not_smtp_mime.
771 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
772 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
773 or even an in-clear connection were permitted. Now, if the host lookup
774 was dnssec and dane was requested then the host is only used if the
775 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
776 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
777 if one fails this test.
778 This means that a poorly-configured remote DNS will make it incommunicado;
779 but it protects against a DNS-interception attack on it.
781 JH/04 Bug 1810: make continued-use of an open smtp transport connection
782 non-noisy when a race steals the message being considered.
784 JH/05 If main configuration option tls_certificate is unset, generate a
785 self-signed certificate for inbound TLS connections.
787 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
788 in rewrites and routers.
790 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
791 and logged a warning sing 4.83; now they are a configuration file error.
793 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
794 (lacking @domain). Apply the same qualification processing as RCPT.
796 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
798 JH/10 Support ${sha256:} applied to a string (as well as the previous
801 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
802 a cutthrough deliver is pending, as we always want to make a connection.
803 This also avoids re-routing the message when later placing the cutthrough
804 connection after a verify cache hit.
805 Do not update it with the verify result either.
807 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
808 when routing results in more than one destination address.
810 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
811 signing (which inhibits the cutthrough capability). Previously only
812 the presence of an option was tested; now an expansion evaluating as
813 empty is permissible (obviously it should depend only on data available
814 when the cutthrough connection is made).
816 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
817 the relevant preceding SMTP command did not note the pipelining mode.
819 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
820 Previously they were not counted.
822 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
823 as one having no matching records. Previously we deferred the message
824 that needed the lookup.
826 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
827 distinguished as "(=".
829 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
830 for missing MX records. Previously it only worked for missing A records.
832 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
834 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
835 after the data-go-ahead and data-ack. Patch from Jason Betts.
837 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
838 even for a "none" policy. Patch from Tony Meyer.
840 JH/22 Fix continued use of a connection for further deliveries. If a port was
841 specified by a router, it must also match for the delivery to be
844 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
845 When one of the recipients of a message was unsuitable for the connection
846 (has no matching addresses), we lost track of needing to mark it
847 deferred. As a result mail would be lost.
849 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
851 JH/25 Decoding ACL controls is now done using a binary search; the source code
852 takes up less space and should be simpler to maintain. Merge the ACL
853 condition decode tables also, with similar effect.
855 JH/26 Fix problem with one_time used on a redirect router which returned the
856 parent address unchanged. A retry would see the parent address marked as
857 delivered, so not attempt the (identical) child. As a result mail would
860 JH/27 Fix a possible security hole, wherein a process operating with the Exim
861 UID can gain a root shell. Credit to http://www.halfdog.net/ for
862 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
865 JH/28 Enable {spool,log} filesystem space and inode checks as default.
866 Main config options check_{log,spool}_{inodes,space} are now
867 100 inodes, 10MB unless set otherwise in the configuration.
869 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
870 Previously it only applied to the main-section connection policy
873 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
875 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
876 by me. Added RFC7919 DH primes as an alternative.
878 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
879 are not in the system include path.
881 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
882 GnuTLS, when a session startup failed (eg because the client disconnected)
883 Exim did stdio operations after fclose. This was exposed by a recent
884 change which nulled out the file handle after the fclose.
886 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
887 signed directly by the cert-signing cert, rather than an intermediate
888 OCSP-signing cert. This is the model used by LetsEncrypt.
890 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
892 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
893 an incoming connection.
895 HS/02 Bug 1802: Do not half-close the connection after sending a request
898 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
899 fallback to "prime256v1".
901 JH/34 SECURITY: Use proper copy of DATA command in error message.
902 Could leak key material. Remotely exploitable. CVE-2016-9963.
908 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
909 and 3.4.4 - once the server is enabled to respond to an OCSP request
910 it does even when not requested, resulting in a stapling non-aware
911 client dropping the TLS connection.
913 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
914 support variable-length bit vectors. No functional change.
916 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
917 The I= interface field on outgoing lines is now after the H= remote
918 host field, same as incoming lines. There is a separate
919 outgoing_interface log selector which allows you to disable the
922 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
923 If not running log_selector +smtp_connection the mainlog would be held
924 open indefinitely after a "too many connections" event, including to a
925 deleted file after a log rotate. Leave the per net connection logging
926 leaving it open for efficiency as that will be quickly detected by the
927 check on the next write.
929 HS/01 Bug 1671: Fix post transport crash.
930 Processing the wait-<transport> messages could crash the delivery
931 process if the message IDs didn't exist for some reason. When
932 using 'split_spool_directory=yes' the construction of the spool
933 file name failed already, exposing the same netto behaviour.
935 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
936 mime_regex ACL conditions.
938 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
939 to DSN fail messages (bounces): remote IP, remote greeting, remote response
940 to HELO, local diagnostic string.
942 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
943 log line to debug. Even when configured with a tls authenticator many
944 client connections are expected to not authenticate in this way, so
945 an authenticate fail is not an error.
947 HS/02 Add the Exim version string to the process info. This way exiwhat
948 gives some more detail about the running daemon.
950 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
951 matter for fast-change records such as DNSBLs.
953 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
954 retry record, even if constant. There may be multiple transports with
955 different interface settings and the retry behaviour needs to be kept
958 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
960 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
962 JH/10 Bug 840: fix log_defer_output option of pipe transport
964 JH/11 Bug 830: use same host for all RCPTS of a message, even under
965 hosts_randomize. This matters a lot when combined with mua_wrapper.
967 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
968 ${quote_pgsql:<string>} operator.
970 JH/13 Bug 1708: avoid misaligned access in cached lookup.
972 JH/14 Change header file name for freeradius-client. Relevant if compiling
973 with Radius support; from the Gentoo tree and checked under Fedora.
975 JH/15 Bug 1712: Introduce $prdr_requested flag variable
977 JH/16 Bug 1714: Permit an empty string as expansion result for transport
978 option transport_filter, meaning no filtering.
980 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
982 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
983 defaults to "*" (all hosts). The variable is now available when not built
984 with TLS, default unset, mainly to enable keeping the testsuite sane.
985 If a server certificate is not supplied (via tls_certificate) an error is
986 logged, and clients will find TLS connections fail on startup. Presumably
987 they will retry in-clear.
988 Packagers of Exim are strongly encouraged to create a server certificate
989 at installation time.
991 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
992 with the $config_file variable.
994 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
995 in transport context, after the attempt, and per-recipient. The latter type
996 is per host attempted. The event data is the error message, and the errno
997 information encodes the lookup type (A vs. MX) used for the (first) host,
998 and the trailing two digits of the smtp 4xx response.
1000 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1001 to write to mainlog (or rejectlog, paniclog) in the window between file
1002 creation and permissions/ownership being changed. Particularly affects
1003 installations where exicyclog is run as root, rather than exim user;
1004 result is that the running daemon panics and dies.
1006 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1008 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1009 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1010 "pri" and "weight". Note that the previous implicit priority given by the
1011 list order is no longer honoured.
1013 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1014 for DKIM processing.
1016 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1017 by defining SUPPORT_SOCKS.
1019 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1020 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1021 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1022 variables are renamed to proxy_{local,external}_{address,port}.
1024 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1025 for a build by defining SUPPORT_I18N
1027 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1028 of the query string, and make ${quote_redis:} do that quoting.
1030 JH/29 Move Events support from Experimental to mainline, enabled by default
1031 and removable for a build by defining DISABLE_EVENT.
1033 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1035 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1036 cached by the daemon.
1038 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1039 by defining LOOKUP_REDIS. The libhiredis library is required.
1041 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1042 keys are given for lookup.
1044 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1045 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1046 only supported when built with TLS support. The PolarSSL SHA routines
1047 are still used when the TLS library is too old for convenient support.
1049 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1050 openssl_options), for security. OpenSSL forces this from version 1.1.0
1051 server-side so match that on older versions.
1053 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1054 allocation for $value could be released as the expansion processing
1055 concluded, but leaving the global pointer active for it.
1057 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1058 and to use the domains and local_parts ACL conditions.
1060 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1061 incorrectly not doubled on cutthrough transmission, hence seen as a
1062 body-termination at the receiving system - resulting in truncated mails.
1063 Commonly the sender saw a TCP-level error, and retransmitted the message
1064 via the normal store-and-forward channel. This could result in duplicates
1065 received - but deduplicating mailstores were liable to retain only the
1066 initial truncated version.
1068 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1070 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1072 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1073 we're in there, support oversigning also; bug 1309.
1075 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1077 HS/04 Add support for keep_environment and add_environment options.
1079 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1080 either intentional arithmetic overflow during PRNG, or testing config-
1083 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1084 delivery resulted in actual delivery. Cancel cutthrough before DATA
1087 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1088 rejects a recipient: pass the reject to the originator.
1090 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1091 Many were false-positives and ignorable, but it's worth fixing the
1094 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1095 for the new environment-manipulation done at startup. Move the routines
1096 from being local to tls.c to being global via the os.c file.
1098 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1099 an extract embedded as result-arg for a map, the first arg for extract
1100 is unavailable so we cannot tell if this is a numbered or keyed
1101 extraction. Accept either.
1107 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1110 JH/02 The smtp transport option "multi_domain" is now expanded.
1112 JH/03 The smtp transport now requests PRDR by default, if the server offers
1115 JH/04 Certificate name checking on server certificates, when exim is a client,
1116 is now done by default. The transport option tls_verify_cert_hostnames
1117 can be used to disable this per-host. The build option
1118 EXPERIMENTAL_CERTNAMES is withdrawn.
1120 JH/05 The value of the tls_verify_certificates smtp transport and main options
1121 default to the word "system" to access the system default CA bundle.
1122 For GnuTLS, only version 3.0.20 or later.
1124 JH/06 Verification of the server certificate for a TLS connection is now tried
1125 (but not required) by default. The verification status is now logged by
1126 default, for both outbound TLS and client-certificate supplying inbound
1129 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1132 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1133 Status Notification (bounce) messages are now MIME format per RFC 3464.
1134 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1135 under the control of the dsn_advertise_hosts option, and routers may
1136 have a dsn_lasthop option.
1138 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1139 default, modifiable by a malware= option. The list separator for
1140 the options can now be changed in the usual way. Bug 68.
1142 JH/10 The smtp_receive_timeout main option is now expanded before use.
1144 JH/11 The incoming_interface log option now also enables logging of the
1145 local interface on delivery outgoing connections.
1147 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1148 if the interface and destination host and port all match.
1150 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1153 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1154 Patch from Andrew Lewis.
1156 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1157 now supports optional time-restrictions, weighting, and priority
1158 modifiers per server. Patch originally by <rommer@active.by>.
1160 JH/16 The spamd_address main option now supports a mixed list of local
1161 and remote servers. Remote servers can be IPv6 addresses, and
1162 specify a port-range.
1164 JH/17 Bug 68: The spamd_address main option now supports an optional
1165 timeout value per server.
1167 JH/18 Bug 1581: Router and transport options headers_add/remove can
1168 now have the list separator specified.
1170 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1173 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1176 JH/21 Support for the A6 type of dns record is withdrawn.
1178 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1179 rather than the verbs used.
1181 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1182 from 255 to 1024 chars.
1184 JH/24 Verification callouts now attempt to use TLS by default.
1186 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1187 are generic router options now. The defaults didn't change.
1189 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1190 Original patch from Alexander Shikoff, worked over by JH.
1192 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1193 files if ZCAT_COMMAND is not executable.
1195 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1197 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1199 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1200 Normally benign, it bites when the pair was led to by a CNAME;
1201 modern usage is to not canonicalize the domain to a CNAME target
1202 (and we were inconsistent anyway for A-only vs AAAA+A).
1204 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1206 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1207 when evaluating $sender_host_dnssec.
1209 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1210 $sender_helo_dnssec variable.
1212 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1214 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1216 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1218 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1219 documented as working, but never had. Support all but $spam_report.
1221 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1222 added for tls authenticator.
1224 HS/03 Add perl_taintmode main config option
1230 TL/01 When running the test suite, the README says that variables such as
1231 no_msglog_check are global and can be placed anywhere in a specific
1232 test's script, however it was observed that placement needed to be near
1233 the beginning for it to behave that way. Changed the runtest perl
1234 script to read through the entire script once to detect and set these
1235 variables, reset to the beginning of the script, and then run through
1236 the script parsing/test process like normal.
1238 TL/02 The BSD's have an arc4random API. One of the functions to induce
1239 adding randomness was arc4random_stir(), but it has been removed in
1240 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1241 function when detected.
1243 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1244 cause callback expansion.
1246 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1247 syntax errors in an expansion can be treated as a string instead of
1248 logging or causing an error, due to the internal use of bool_lax
1249 instead of bool when processing it.
1251 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1252 server certificates when making smtp deliveries.
1254 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1256 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1258 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1260 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1261 Merged patch from Sebastian Wiedenroth.
1263 JH/05 Fix results-pipe from transport process. Several recipients, combined
1264 with certificate use, exposed issues where response data items split
1265 over buffer boundaries were not parsed properly. This eventually
1266 resulted in duplicates being sent. This issue only became common enough
1267 to notice due to the introduction of connection certificate information,
1268 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1270 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1271 size buffer was used, resulting in syntax errors when an expansion
1274 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1275 version 3.3.6 or later.
1277 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1278 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1279 both become "event_action", the variables become $event_name, $event_data
1280 and $event_defer_errno. There is a new variable $verify_mode, usable in
1281 routers, transports and related events. The tls:cert event is now also
1282 raised for inbound connections, if the main configuration event_action
1285 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1286 early OCSP support, but no stapling (appears to be less than 1.0.0).
1288 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1289 server certificate names available under the smtp transport option
1290 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1293 JH/10 Time-related extraction expansions from certificates now use the main
1294 option "timezone" setting for output formatting, and are consistent
1295 between OpenSSL and GnuTLS compilations. Bug 1541.
1297 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1298 encoded parameter in the incoming message. Bug 1558.
1300 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1301 include certificate info, eximon was claiming there were spoolfile
1304 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1306 JH/14 Log delivery-related information more consistently, using the sequence
1307 "H=<name> [<ip>]" wherever possible.
1309 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1310 are problematic for Debian distribution, omit them from the release
1313 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1315 JH/16 Fix string representation of time values on 64bit time_t architectures.
1318 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1319 output list separator was used.
1324 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1325 checkers that were complaining about end of non-void function with no
1328 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1329 This was a regression introduced in 4.83 by another bugfix.
1331 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1333 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1334 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1340 TF/01 Correctly close the server side of TLS when forking for delivery.
1342 When a message was received over SMTP with TLS, Exim failed to clear up
1343 the incoming connection properly after forking off the child process to
1344 deliver the message. In some situations the subsequent outgoing
1345 delivery connection happened to have the same fd number as the incoming
1346 connection previously had. Exim would try to use TLS and fail, logging
1347 a "Bad file descriptor" error.
1349 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1350 utilities have not been installed.
1352 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1353 temporary space as the ACL may create new global variables.
1355 TL/01 LDAP support uses per connection or global context settings, depending
1356 upon the detected version of the libraries at build time.
1358 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1359 to extract and use the src ip:port in logging and expansions as if it
1360 were a direct connection from the outside internet. PPv2 support was
1361 updated based on HAProxy spec change in May 2014.
1363 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1365 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1366 Properly escape header and check for NULL return.
1368 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1371 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1373 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1374 characters in header names, implemented as a verify condition.
1375 Contributed by Michael Fischer v. Mollard.
1377 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1378 results permerror and temperror. Previous values are deprecated but
1379 still accepted. In a future release, err_perm and err_temp will be
1380 completely removed, which will be a backward incompatibility if the
1381 ACL tests for either of these two old results. Patch contributed by
1382 user bes-internal on the mailing list.
1384 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1386 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1387 selectors, in both main and reject logs.
1389 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1392 JH/07 Add malware type "sock" for talking to simple daemon.
1394 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1396 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1397 routers/transports under cutthrough routing.
1399 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1400 numbers. Touch up "bool" conditional to keep the same definition.
1402 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1404 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1406 JH/12 Expand items in router/transport headers_add or headers_remove lists
1407 individually rather than the list as a whole. Bug 1452.
1409 Required for reasonable handling of multiple headers_ options when
1410 they may be empty; requires that headers_remove items with embedded
1411 colons must have them doubled (or the list-separator changed).
1413 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1414 view the policy declared in the DMARC record. Currently, $dmarc_status
1415 is a combined value of both the record presence and the result of the
1418 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1420 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1421 dnslookup router and the smtp transport (applying to the forward
1424 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1425 of ldap servers used for a specific lookup. Patch provided by Heiko
1428 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1429 New variable $lookup_dnssec_authenticated for observability.
1431 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1432 Patch submitted by Lars Timman.
1434 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1436 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1437 Requires trusted mode and valid format message id, aborts otherwise.
1438 Patch contributed by Heiko Schlichting.
1440 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1441 certextract with support for various fields. Bug 1358.
1443 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1444 is requested by default, modifiable by smtp transport option
1447 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1448 operate on certificate variables to give certificate fingerprints
1449 Also new ${sha256:cert_variable}.
1451 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1453 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1454 Christian Aistleitner.
1456 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1458 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1459 file. Patch from Wolfgang Breyha.
1461 JH/25 Expand the coverage of the delivery $host and $host_address to
1462 client authenticators run in verify callout. Bug 1476.
1464 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1465 align with daemon_smtp_ports. Bug 72.
1467 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1468 support and error reporting did not work properly.
1470 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1471 and is readable. Patch from Andrew Colin Kissa.
1473 TL/14 Enhance documentation of ${run expansion and how it parses the
1474 commandline after expansion, particularly in the case when an
1475 unquoted variable expansion results in an empty value.
1477 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1479 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1480 by renaming away from it. Addresses GH issue 15, reported by
1483 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1485 TL/15 SECURITY: prevent double expansion in math comparison functions
1486 (can expand unsanitized data). Not remotely exploitable.
1493 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1495 PP/02 Make -n do something, by making it not do something.
1496 When combined with -bP, the name of an option is not output.
1498 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1501 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1502 $sender_host_name and config options to manage this, and basic check
1505 PP/05 DSCP support for outbound connections and control modifier for inbound.
1507 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1508 (Only plugin which currently uses this is kerberos4, which nobody should
1509 be using, but we should make it available and other future plugins might
1510 conceivably use it, even though it would break NAT; stuff *should* be
1511 using channel bindings instead).
1513 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1514 name; added for Sendmail compatibility; requires admin caller.
1515 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1516 just ignore it); requires trusted caller.
1517 Also parse but ignore: -Ac -Am -X<logfile>
1520 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1522 TL/02 Add +smtp_confirmation as a default logging option.
1524 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1525 Patch by Magnus Holmgren from 2007-02-20.
1527 TL/04 Bugzilla 1281 - Spec typo.
1528 Bugzilla 1283 - Spec typo.
1529 Bugzilla 1290 - Spec grammar fixes.
1531 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1533 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1535 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1536 mailing list by by Dmitry Isaikin.
1538 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1540 JH/02 Support "G" suffix to numbers in ${if comparisons.
1542 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1544 NM/01 Bugzilla 1197 - Spec typo
1545 Bugzilla 1196 - Spec examples corrections
1547 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1549 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1550 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1553 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1554 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1556 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1557 "acl {{name}{arg}...}", and optional args on acl condition
1560 JH/05 Permit multiple router/transport headers_add/remove lines.
1562 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1564 JH/07 Avoid using a waiting database for a single-message-only transport.
1565 Performance patch from Paul Fisher. Bugzilla 1262.
1567 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1570 JH/09 Add $headers_added variable, with content from use of ACL modifier
1571 add_header (but not yet added to the message). Bugzilla 199.
1573 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1574 Pulled from Bugzilla 817 by Wolfgang Breyha.
1576 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1578 (nb: this is the same fix as in Exim 4.80.1)
1580 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1583 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1586 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1588 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1589 advertise SMTP AUTH mechanism to us, instead of a generic
1590 protocol violation error. Also, make Exim more robust to bad
1591 data from the Dovecot auth socket.
1593 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1595 When a queue runner is handling a message, Exim first routes the
1596 recipient addresses, during which it prunes them based on the retry
1597 hints database. After that it attempts to deliver the message to
1598 any remaining recipients. It then updates the hints database using
1601 So if a recipient address works intermittently, it can get repeatedly
1602 deferred at routing time. The retry hints record remains fresh so the
1603 address never reaches the final cutoff time.
1605 This is a fairly common occurrence when a user is bumping up against
1606 their storage quota. Exim had some logic in its local delivery code
1607 to deal with this. However it did not apply to per-recipient defers
1608 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1610 This change adds a proper retry rule check during routing so that the
1611 final cutoff time is checked against the message's age. We only do
1612 this check if there is an address retry record and there is not a
1613 domain retry record; this implies that previous attempts to handle
1614 the address had the retry_use_local_parts option turned on. We use
1615 this as an approximation for the destination being like a local
1616 delivery, as in LMTP.
1618 I suspect this new check makes the old local delivery cutoff check
1619 redundant, but I have not verified this so I left the code in place.
1621 TF/02 Correct gecos expansion when From: is a prefix of the username.
1623 Test 0254 submits a message to Exim with the header
1627 When I ran the test suite under the user fanf2, Exim expanded
1628 the header to contain my full name, whereas it should have added
1629 a Resent-Sender: header. It erroneously treats any prefix of the
1630 username as equal to the username.
1632 This change corrects that bug.
1634 GF/01 DCC debug and logging tidyup
1635 Error conditions log to paniclog rather than rejectlog.
1636 Debug lines prefixed by "DCC: " to remove any ambiguity.
1638 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1640 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1641 Bug spotted by Jeremy Harris; was flawed since initial commit.
1642 Would have resulted in OCSP responses post-SNI triggering an Exim
1643 NULL dereference and crash.
1645 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1647 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1648 Bug detection, analysis and fix by Samuel Thibault.
1649 Bugzilla 1331, Debian bug #698092.
1651 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1653 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1654 Server implementation by Todd Lyons, client by JH.
1655 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1656 config variable "prdr_enable" controls whether the server
1657 advertises the facility. If the client requests PRDR a new
1658 acl_data_smtp_prdr ACL is called once for each recipient, after
1659 the body content is received and before the acl_smtp_data ACL.
1660 The client is controlled by both of: a hosts_try_prdr option
1661 on the smtp transport, and the server advertisement.
1662 Default client logging of deliveries and rejections involving
1663 PRDR are flagged with the string "PRDR".
1665 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1666 fclose(). Diagnosis by Todd Lyons.
1668 PP/17 Update configure.default to handle IPv6 localhost better.
1669 Patch by Alain Williams (plus minor tweaks).
1672 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1673 This is now consistent with GnuTLS, and is now documented: the
1674 previous undocumented portable approach to treating the option as
1675 unset was to force an expansion failure. That still works, and
1676 an empty string is now equivalent.
1678 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1679 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1680 not performing validation itself.
1682 PP/20 Added force_command boolean option to pipe transport.
1683 Patch from Nick Koston, of cPanel Inc.
1685 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1688 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1690 PP/21 Fix eximon continuous updating with timestamped log-files.
1691 Broken in a format-string cleanup in 4.80, missed when I repaired the
1692 other false fix of the same issue.
1693 Report and fix from Heiko Schlichting.
1696 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1697 Report from Prashanth Katuri.
1699 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1700 It's SecureTransport, so affects any MacOS clients which use the
1701 system-integrated TLS libraries, including email clients.
1703 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1704 using a MIME ACL for non-SMTP local injection.
1705 Report and assistance in diagnosis by Warren Baker.
1707 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1709 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1711 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1712 last id that failed so it may be referenced in subsequent ACL's.
1714 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1717 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1718 ldap library initialization, allowing self-signed CA's to be
1719 used. Also properly sets require_cert option later in code by
1720 using NULL (global ldap config) instead of ldap handle (per
1721 session). Bug diagnosis and testing by alxgomz.
1723 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1724 the src/util/ subdirectory.
1726 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1727 renamed to Transport Post Delivery Action by Jeremy Harris, as
1730 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1731 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1732 redis_servers = needs to be configured which will be used by the redis
1733 lookup. Patch from Warren Baker, of The Packet Hub.
1735 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1737 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1738 hostname or reverse DNS when processing a host list. Used suggestions
1739 from multiple comments on this bug.
1741 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1743 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1744 Missed a few lines, added it to make the runtest require no keyboard
1747 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1748 contains upper case chars. Make router use caseful_local_part.
1750 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1751 support when GnuTLS has been built with p11-kit.
1757 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1759 This, or similar/improved, will also be change PP/11 of 4.82.
1765 PP/01 Handle short writes when writing local log-files.
1766 In practice, only affects FreeBSD (8 onwards).
1767 Bugzilla 1053, with thanks to Dmitry Isaikin.
1769 NM/01 Bugzilla 949 - Documentation tweak
1771 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1774 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1776 PP/02 Implemented gsasl authenticator.
1778 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1780 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1781 `pkg-config foo` for cflags/libs.
1783 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1784 with rest of GSASL and with heimdal_gssapi.
1786 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1787 `pkg-config foo` for cflags/libs for the TLS implementation.
1789 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1790 properties get this fed in as external SSF. A number of robustness
1791 and debugging improvements to the cyrus_sasl authenticator.
1793 PP/08 cyrus_sasl server now expands the server_realm option.
1795 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1796 Patch by Jeremy Harris.
1798 PP/10 Added dbmjz lookup type.
1800 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1802 PP/12 MAIL args handles TAB as well as SP, for better interop with
1803 non-compliant senders.
1804 Analysis and variant patch by Todd Lyons.
1806 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1807 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1808 Patch from Dirk Mueller <dmueller@suse.com>
1810 PP/13 tls_peerdn now print-escaped for spool files.
1811 Observed some $tls_peerdn in wild which contained \n, which resulted
1812 in spool file corruption.
1814 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1815 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1816 or write after TLS renegotiation, which otherwise led to messages
1819 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1820 as a tracking header (ie: a signed header comes before the signature).
1821 Patch from Wolfgang Breyha.
1823 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1824 comma-sep list; embedded commas doubled.
1826 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1828 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1830 Report and patch from Dmitry Banschikov.
1832 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1833 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1834 failures. We appear to now support TLS1.1+ with Exim.
1836 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1837 lets Exim select keys and certificates based upon TLS SNI from client.
1838 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1839 before an outbound SMTP session. New log_selector, +tls_sni.
1841 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1842 NULL dereference. Report and patch from Alun Jones.
1844 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1845 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1846 Not seeing resolver debug output on NetBSD, but suspect this is a
1847 resolver implementation change.
1849 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1850 Left warnings. Added "eximon gdb" invocation mode.
1852 PP/21 Defaulting "accept_8bitmime" to true, not false.
1854 PP/22 Added -bw for inetd wait mode support.
1856 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1857 locate the relevant includes and libraries. Made this the default.
1859 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1860 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1862 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1863 This may cause build issues on older platforms.
1865 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1866 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1867 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1868 Added SNI support via GnuTLS too.
1869 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1871 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1873 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1874 Applied second patch from Janne, implementing suggestion to default
1875 multiple-strings-in-record handling to match SPF spec.
1877 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1879 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1880 read-only, out of scope).
1881 Patch from Wolfgang Breyha, report from Stuart Northfield.
1883 PP/29 Fix three issues highlighted by clang analyser static analysis.
1884 Only crash-plausible issue would require the Cambridge-specific
1885 iplookup router and a misconfiguration.
1886 Report from Marcin Mirosław.
1888 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1890 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1891 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1892 As part of this, removing so much warning spew let me fix some minor
1893 real issues in debug logging.
1895 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1896 assignment on my part. Fixed.
1898 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1899 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1900 Janne Snabb (who went above and beyond: thank you).
1902 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1903 string otherwise requires a connection and a bunch more work and it's
1904 relatively easy to get wrong. Should also expose TLS library linkage
1907 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1908 64-bit ${eval} (JH/03).
1910 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1911 GNU libc to support some of the 64-bit stuff, should not lead to
1912 conflicts. Defined before os.h is pulled in, so if a given platform
1913 needs to override this, it can.
1915 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1916 protection layer was required, which is not implemented.
1917 Bugzilla 1254, patch from Wolfgang Breyha.
1919 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1920 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1921 tls_dhparam take prime identifiers. Also unbreak combination of
1922 OpenSSL+DH_params+TLSSNI.
1924 PP/39 Disable SSLv2 by default in OpenSSL support.
1930 PP/01 Solaris build fix for Oracle's LDAP libraries.
1931 Bugzilla 1109, patch from Stephen Usher.
1933 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1935 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1938 TF/02 Fix a couple more cases where we did not log the error message
1939 when unlink() failed. See also change 4.74-TF/03.
1941 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1942 lock up or crash if it happened to be inside a call to libc when it
1943 got a SIGUSR1 from exiwhat.
1945 The SIGUSR1 handler appends the current process status to the process
1946 log which is later printed by exiwhat. It used to use the general
1947 purpose logging code to do this, but several functions it calls are
1948 not safe for signals.
1950 The new output code in the SIGUSR1 handler is specific to the process
1951 log, and simple enough that it's easy to inspect for signal safety.
1952 Removing some special cases also simplifies the general logging code.
1953 Removing the spurious timestamps from the process log simplifies
1956 TF/04 Improved ratelimit ACL condition.
1958 The /noupdate option has been deprecated in favour of /readonly which
1959 has clearer semantics. The /leaky, /strict, and /readonly update modes
1960 are mutually exclusive. The update mode is no longer included in the
1961 database key; it just determines when the database is updated. (This
1962 means that when you upgrade Exim will forget old rate measurements.)
1964 Exim now checks that the per_* options are used with an update mode that
1965 makes sense for the current ACL. For example, when Exim is processing a
1966 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1967 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1968 must specify per_mail/readonly. If you omit the update mode it defaults to
1969 /leaky where that makes sense (as before) or /readonly where required.
1971 The /noupdate option is now undocumented but still supported for
1972 backwards compatibility. It is equivalent to /readonly except that in
1973 ACLs where /readonly is required you may specify /leaky/noupdate or
1974 /strict/noupdate which are treated the same as /readonly.
1976 A useful new feature is the /count= option. This is a generalization
1977 of the per_byte option, so that you can measure the throughput of other
1978 aggregate values. For example, the per_byte option is now equivalent
1979 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1981 The per_rcpt option has been generalized using the /count= mechanism
1982 (though it's more complicated than the per_byte equivalence). When it is
1983 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1984 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1985 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1986 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1987 Note that using per_rcpt with a non-readonly update mode in more than
1988 one ACL will cause the recipients to be double-counted. (The per_mail
1989 and per_byte options don't have this problem.)
1991 The handling of very low rates has changed slightly. If the computed rate
1992 is less than the event's count (usually one) then this event is the first
1993 after a long gap. In this case the rate is set to the same as this event's
1994 count, so that the first message of a spam run is counted properly.
1996 The major new feature is a mechanism for counting the rate of unique
1997 events. The new per_addr option counts the number of different
1998 recipients that someone has sent messages to in the last time period. It
1999 behaves like per_rcpt if all the recipient addresses are different, but
2000 duplicate recipient addresses do not increase the measured rate. Like
2001 the /count= option this is a general mechanism, so the per_addr option
2002 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2003 example, measure the rate that a client uses different sender addresses
2004 with the options per_mail/unique=$sender_address. There are further
2005 details in the main documentation.
2007 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2009 TF/06 Removed a few PCRE remnants.
2011 TF/07 Automatically extract Exim's version number from tags in the git
2012 repository when doing development or release builds.
2014 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2015 Bugzilla 879. Patch from Paul Fisher.
2017 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2018 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2021 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2023 PP/05 Variable $av_failed, true if the AV scanner deferred.
2024 Bugzilla 1078. Patch from John Horne.
2026 PP/06 Stop make process more reliably on build failure.
2027 Bugzilla 1087. Patch from Heiko Schlittermann.
2029 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2030 Bugzilla 1089. Patch from Heiko Schlittermann.
2032 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2033 Bugzilla 1131. Patch from Holger Weiß.
2035 PP/09 Handle IPv6 addresses with SPF.
2036 Bugzilla 860. Patch from Wolfgang Breyha.
2038 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2040 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2043 PP/11 match_* no longer expand right-hand-side by default.
2044 New compile-time build option, EXPAND_LISTMATCH_RHS.
2045 New expansion conditions, "inlist", "inlisti".
2047 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2049 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2051 PP/14 fix log_write() format string regression from TF/03.
2052 Bugzilla 1152. Patch from Dmitry Isaikin.
2058 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2060 PP/02 Harmonised TLS library version reporting; only show if debugging.
2061 Layout now matches that introduced for other libraries in 4.74 PP/03.
2063 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2065 PP/04 New "dns_use_edns0" global option.
2067 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2070 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2071 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2073 TK/01 Updated PolarSSL code to 0.14.2.
2074 Bugzilla 1097. Patch from Andreas Metzler.
2076 PP/07 Catch divide-by-zero in ${eval:...}.
2077 Fixes bugzilla 1102.
2079 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2082 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2083 format-string attack -- SECURITY: remote arbitrary code execution.
2085 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2086 time unintentionally subject to list matching rules, letting the header
2087 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2088 arbitrary string expansion). This allowed for information disclosure.
2090 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2091 INT_MIN/-1 -- value coerced to INT_MAX.
2097 NM/01 Workaround for PCRE version dependency in version reporting
2100 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2101 This fixes portability to compilers other than gcc, notably
2102 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2104 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2105 makefiles for portability to HP-UX and POSIX correctness.
2107 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2108 Also via indented variable definition in the Makefile.
2109 (Debugging by Oliver Heesakkers).
2111 PP/02 Restore caching of spamd results with expanded spamd_address.
2112 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2114 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2115 Improves build reliability. Fix from: Frank Elsner
2117 NM/02 Fix wide character breakage in the rfc2047 coding
2118 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2120 NM/03 Allow underscore in dnslist lookups
2121 Fixes bug 1026. Patch from Graeme Fowler
2123 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2124 Code patches from Adam Ciarcinski of NetBSD.
2126 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2129 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2130 is logged, to avoid truncation. Patch from John Horne.
2132 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2133 Patch from Jakob Hirsch.
2135 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2136 SQL string expansion failure details.
2137 Patch from Andrey Oktyabrski.
2139 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2140 Patch from Simon Arlott.
2142 PP/09 New lookups functionality failed to compile on old gcc which rejects
2143 extern declarations in function scope.
2144 Patch from Oliver Fleischmann
2146 PP/10 Use sig_atomic_t for flags set from signal handlers.
2147 Check getgroups() return and improve debugging.
2148 Fixed developed for diagnosis in bug 927 (which turned out to be
2151 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2152 Patch from Mark Zealey.
2154 PP/12 Bugzilla 1056: Improved spamd server selection.
2155 Patch from Mark Zealey.
2157 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2158 Based on patch from Heiko Schlittermann.
2160 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2161 Patch from Uwe Doering, sign-off by Michael Haardt.
2163 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2164 variable declaration deep within a block. Bug and patch from
2167 PP/15 lookups-Makefile IRIX compatibility coercion.
2169 PP/16 Make DISABLE_DKIM build knob functional.
2171 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2172 Patch by Simon Arlott
2174 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2175 variable argument macros. Our copy now differs from upstream.
2181 TF/01 Failure to get a lock on a hints database can have serious
2182 consequences so log it to the panic log.
2184 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2185 controlled using the smtp_confirmation log selector.
2187 TF/03 Include the error message when we fail to unlink a spool file.
2189 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2190 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2191 for maintaining out-of-tree patches for some time.
2193 PP/01 Bugzilla 139: Documentation and portability issues.
2194 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2195 Handle per-OS dynamic-module compilation flags.
2197 PP/02 Let /dev/null have normal permissions.
2198 The 4.73 fixes were a little too stringent and complained about the
2199 permissions on /dev/null. Exempt it from some checks.
2200 Reported by Andreas M. Kirchwitz.
2202 PP/03 Report version information for many libraries, including
2203 Exim version information for dynamically loaded libraries. Created
2204 version.h, now support a version extension string for distributors
2205 who patch heavily. Dynamic module ABI change.
2207 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2208 privilege escalation vulnerability whereby the Exim run-time user
2209 can cause root to append content of the attacker's choosing to
2212 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2215 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2216 If dropping privileges for untrusted macros, we disabled normal logging
2217 on the basis that it would fail; for the Exim run-time user, this is not
2218 the case, and it resulted in successful deliveries going unlogged.
2219 Fixed. Reported by Andreas Metzler.
2225 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2226 only prepend for the Resent-* case. Fixes regression introduced in
2227 Exim 4.70 by NM/22 for Bugzilla 607.
2229 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2230 increasing numbers of administrators be bitten by this.
2232 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2234 PP/03 Bugzilla 994: added openssl_options main configuration option.
2236 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2238 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2240 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2242 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2243 without a peer certificate, leading to a segfault because of an
2244 assumption that peers always have certificates. Be a little more
2245 paranoid. Problem reported by Martin Tscholak.
2247 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2248 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2249 NB: ClamAV planning to remove STREAM in "middle of 2010".
2250 CL also introduces -bmalware, various -d+acl logging additions and
2251 more caution in buffer sizes.
2253 PP/09 Implemented reverse_ip expansion operator.
2255 PP/10 Bugzilla 937: provide a "debug" ACL control.
2257 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2259 PP/12 Bugzilla 973: Implement --version.
2261 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2263 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2265 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2267 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2268 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2269 ignore trailing whitespace.
2271 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2273 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2276 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2277 Notification from Dr Andrew Aitchison.
2279 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2280 ExtendedDetectionInfo response format.
2281 Notification from John Horne.
2283 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2286 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2287 XSL and documented dependency on system catalogs, with examples of how
2290 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2293 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2294 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2295 configuration file which is writeable by the Exim user or group.
2297 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2298 of configuration files to cover files specified with the -C option if
2299 they are going to be used with root privileges, not just the default
2302 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2303 option (effectively making it always true).
2305 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2306 files to be used while preserving root privileges.
2308 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2309 that rogue child processes cannot use them.
2311 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2312 run-time user, instead of root.
2314 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2315 Exim run-time user without dropping privileges.
2317 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2318 result string, instead of calling string_vformat() twice with the same
2321 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2322 for other users. Others should always drop root privileges if they use
2323 -C on the command line, even for a whitelisted configure file.
2325 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2327 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2333 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2334 $data_path, and $header_path variables; fixed documentation bugs and
2337 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2338 exipick to access non-standard spools, including the "frozen" queue
2341 NM/01 Bugzilla 965: Support mysql stored procedures.
2342 Patch from Alain Williams
2344 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2346 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2347 Patch from Andreas Metzler
2349 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2350 Patch from Kirill Miazine
2352 NM/05 Bugzilla 671: Added umask to procmail example.
2354 JJ/03 installed exipick 20100323.0, fixing doc bug
2356 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2357 directory. Notification and patch from Dan Rosenberg.
2359 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2361 TK/02 Improve log output when DKIM signing operation fails.
2363 MH/01 Treat the transport option dkim_domain as a colon separated
2364 list, not as a single string, and sign the message with each element,
2365 omitting multiple occurences of the same signer.
2367 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2368 Bugzilla 985, 986. Patch by Simon Arlott
2370 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2371 Patch by Simon Arlott
2373 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2374 MBX locking. Notification from Dan Rosenberg.
2380 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2382 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2384 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2386 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2388 NM/04 Bugzilla 915: Flag broken perl installation during build.
2394 TK/01 Added patch by Johannes Berg that expands the main option
2395 "spamd_address" if it starts with a dollar sign.
2397 TK/02 Write list of recipients to X-Envelope-Sender header when building
2398 the mbox-format spool file for content scanning (suggested by Jakob
2401 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2402 (http://www.dcc-servers.net/) support via dccifd. Activated by
2403 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2405 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2406 by Mark Daniel Reidel <mr@df.eu>.
2408 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2409 When building exim an external PCRE library is now needed -
2410 PCRE is a system library on the majority of modern systems.
2411 See entry on PCRE_LIBS in EDITME file.
2413 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2414 conversation. Added nologin parameter to request.
2415 Patch contributed by Kirill Miazine.
2417 TF/01 Do not log submission mode rewrites if they do not change the address.
2419 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2421 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2422 log files in place. Contributed by Roberto Lima.
2424 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2426 TF/03 Bugzilla 615: When checking the local_parts router precondition
2427 after a local_part_suffix or local_part_prefix option, Exim now
2428 does not use the address's named list lookup cache, since this
2429 contains cached lookups for the whole local part.
2431 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2432 Robert Millan. Documentation is in experimental-spec.txt.
2434 TF/04 Bugzilla 668: Fix parallel build (make -j).
2436 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2438 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2439 Patch provided by Jan Srzednicki.
2441 TF/05 Leading white space used to be stripped from $spam_report which
2442 wrecked the formatting. Now it is preserved.
2444 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2445 that they are available at delivery time.
2447 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2449 TF/08 TLS error reporting now respects the incoming_interface and
2450 incoming_port log selectors.
2452 TF/09 Produce a more useful error message if an SMTP transport's hosts
2453 setting expands to an empty string.
2455 NM/06 Bugzilla 744: EXPN did not work under TLS.
2456 Patch provided by Phil Pennock.
2458 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2459 Patch provided by Richard Godbee.
2461 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2462 acl_smtp_notquit, added index entry.
2464 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2465 Patch provided by Eugene Bujak.
2467 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2468 accept(). Patch provided by Maxim Dounin.
2470 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2471 Patch provided by Phil Pennock.
2473 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2475 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2476 Patch provided by Brad "anomie" Jorsch.
2478 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2479 Patch provided by Dean Brooks.
2481 TK/05 Add native DKIM support (does not depend on external libraries).
2483 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2484 Patch provided by Graeme Fowler.
2486 NM/16 Bugzilla 851: Documentation example syntax fix.
2488 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2490 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2493 NM/19 Bugzilla 745: TLS version reporting.
2494 Patch provided by Phil Pennock.
2496 NM/20 Bugzilla 167: bool: condition support.
2497 Patch provided by Phil Pennock.
2499 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2500 clients. Patch provided by Phil Pennock.
2502 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2503 Patch provided by Brad "anomie" Jorsch.
2505 NM/23 Bugzilla 687: Fix misparses in eximstats.
2506 Patch provided by Heiko Schlittermann.
2508 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2509 Patch provided by Heiko Schlittermann.
2511 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2512 plus update to original patch.
2514 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2516 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2517 Patch provided by David Brownlee.
2519 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2521 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2523 NM/30 Bugzilla 888: TLS documentation bugfixes.
2525 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2527 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2528 Unlike the original bugzilla I have changed all shell scripts in src tree.
2530 NM/33 Bugzilla 898: Transport filter timeout fix.
2531 Patch by Todd Rinaldo.
2533 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2534 Patch by Serge Demonchaux.
2536 NM/35 Bugzilla 39: Base64 decode bug fixes.
2537 Patch by Jakob Hirsch.
2539 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2541 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2543 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2545 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2551 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2552 ALT-N's libdkim that I have put here:
2553 http://duncanthrax.net/exim-experimental/
2555 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2556 were called 'true' and it seems that C99 defines that as a reserved
2557 keyword to be used with 'bool' variable types. That means you could
2558 not include C99-style headers which use bools without triggering
2559 build errors in sieve.c.
2561 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2562 as mailq or other aliases. Changed the --help handling significantly
2563 to do whats expected. exim_usage() emits usage/help information.
2565 SC/01 Added the -bylocaldomain option to eximstats.
2567 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2569 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2571 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2577 PH/01 Another patch from the Sieve maintainer.
2579 PH/02 When an IPv6 address is converted to a string for single-key lookup
2580 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2581 dots are used instead of colons so that keys in lsearch files need not
2582 contain colons. This was done some time before quoting was made available
2583 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2584 (notated using the quote facility) so as to distinguish them from IPv4
2585 keys. This meant that lookups for IP addresses in host lists did not work
2586 for iplsearch lookups.
2588 This has been fixed by arranging for IPv6 addresses to be expressed with
2589 colons if the lookup type is iplsearch. This is not incompatible, because
2590 previously such lookups could never work.
2592 The situation is now rather anomalous, since one *can* have colons in
2593 ordinary lsearch keys. However, making the change in all cases is
2594 incompatible and would probably break a number of configurations.
2596 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2599 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2600 conversion specification without a maximum field width, thereby enabling
2601 a rogue spamd server to cause a buffer overflow. While nobody in their
2602 right mind would setup Exim to query an untrusted spamd server, an
2603 attacker that gains access to a server running spamd could potentially
2604 exploit this vulnerability to run arbitrary code as the Exim user.
2606 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2607 $primary_hostname instead of what libspf2 thinks the hosts name is.
2609 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2610 a directory entry by the name of the lookup key. Previously, if a
2611 symlink pointed to a non-existing file or a file in a directory that
2612 Exim lacked permissions to read, a lookup for a key matching that
2613 symlink would fail. Now it is enough that a matching directory entry
2614 exists, symlink or not. (Bugzilla 503.)
2616 PH/03 The body_linecount and body_zerocount variables are now exported in the
2619 PH/04 Added the $dnslist_matched variable.
2621 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2622 This means they are set thereafter only if the connection becomes
2625 PH/06 Added the client_condition to authenticators so that some can be skipped
2626 by clients under certain conditions.
2628 PH/07 The error message for a badly-placed control=no_multiline_responses left
2629 "_responses" off the end of the name.
2631 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2633 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2634 (without spaces) instead of just copying the configuration text.
2636 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2638 PH/11 Added $max_received_linelength.
2640 PH/12 Added +ignore_defer and +include_defer to host lists.
2642 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2643 way in which PCRE > 7.0 is built.
2645 PH/14 Implemented queue_only_load_latch.
2647 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2648 MAIL command. The effect was to mangle the value on 64-bit systems.
2650 PH/16 Another patch from the Sieve maintainer.
2652 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2654 PH/18 If a system quota error occurred while trying to create the file for
2655 a maildir delivery, the message "Mailbox is full" was not appended to the
2656 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2657 only to a quota excession during the actual writing of the file.
2659 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2660 characters?) which causes problems in log lines. The DN values are now
2661 passed through string_printing() before being added to log lines.
2663 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2664 and InterBase are left for another time.)
2666 PH/21 Added message_body_newlines option.
2668 PH/22 Guard against possible overflow in moan_check_errorcopy().
2670 PH/23 POSIX allows open() to be a macro; guard against that.
2672 PH/24 If the recipient of an error message contained an @ in the local part
2673 (suitably quoted, of course), incorrect values were put in $domain and
2674 $local_part during the evaluation of errors_copy.
2680 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2681 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2684 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2685 issue a MAIL command.
2687 PH/02 In an ACL statement such as
2689 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2691 if a client was not listed at all, or was listed with a value other than
2692 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2693 the condition was not true (as it should be), so access was not denied.
2694 The bug was that the ! inversion was incorrectly passed on to the second
2695 item. This has been fixed.
2697 PH/03 Added additional dnslists conditions == and =& which are different from
2698 = and & when the dns lookup returns more than one IP address.
2700 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2701 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2703 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2704 FSYNC, which compiles an option called disable_fsync that allows for
2705 bypassing fsync(). The documentation is heavily laced with warnings.
2707 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2709 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2710 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2711 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2712 including adding "make clean"; (3) Added -fPIC when compiling the test
2713 dynamically loaded module, to get rid of a warning.
2715 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2716 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2717 = 0s. The bug is otherwise harmless.
2719 PH/07 There was a bug in the dovecot authenticator such that the value of
2720 $auth1 could be overwritten, and so not correctly preserved, after a
2721 successful authentication. This usually meant that the value preserved by
2722 the server_setid option was incorrect.
2724 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2726 PH/09 Installed PCRE release 7.0.
2728 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2729 run for batched SMTP input. It is now run at the start of every message
2730 in the batch. While fixing this I discovered that the process information
2731 (output by running exiwhat) was not always getting set for -bs and -bS
2732 input. This is fixed, and it now also says "batched" for BSMTP.
2734 PH/11 Added control=no_pipelining.
2736 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2737 patch, slightly modified), and move the expansion of helo_data till after
2738 the connection is made in the smtp transport (so it can use these
2741 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2743 PH/14 Added log_selector = +pid.
2745 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2747 PH/16 Add ${if forany and ${if forall.
2749 PH/17 Added dsn_from option to vary the From: line in DSNs.
2751 PH/18 Flush SMTP output before performing a callout, unless control =
2752 no_callout_flush is set.
2754 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2755 was true (the default) a successful delivery failed to delete the retry
2756 item, thus causing premature timeout of the address. The bug is now
2759 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2761 PH/21 Long custom messages for fakedefer and fakereject are now split up
2762 into multiline responses in the same way that messages for "deny" and
2763 other ACL rejections are.
2765 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2766 with slight modification.
2768 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2769 draft, changing the syntax and factoring some duplicate code".
2771 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2772 for deliveries of the second and subsequent messages over the same SMTP
2775 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2776 ${reduce, with only minor "tidies".
2778 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2780 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2781 expansion side effects.
2783 PH/27 When a message times out after an over-quota error from an Exim-imposed
2784 quota, the bounce message says "mailbox is full". This message was not
2785 being given when it was a system quota that was exceeded. It now should
2788 MH/03 Made $recipients available in local_scan(). local_scan() already has
2789 better access to the recipient list through recipients_list[], but
2790 $recipients can be useful in postmaster-provided expansion strings.
2792 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2793 in the case of a MAIL command with additional options following the
2794 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2795 were accidentally chopped off.
2797 PH/29 SMTP synchronization checks are implemented when a command is read -
2798 there is a check that no more input is waiting when there shouldn't be
2799 any. However, for some commands, a delay in an ACL can mean that it is
2800 some time before the response is written. In this time, more input might
2801 arrive, invalidly. So now there are extra checks after an ACL has run for
2802 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2803 pipelining has not been advertised.
2805 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2807 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2808 returned in the SMTP response when smtp_return_error_details was false.
2809 This has been fixed.
2811 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2812 instead of the C I/O that was originally supplied, because problems were
2813 reported on Solaris.
2815 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2816 Exim which did not show up earlier: it was assuming that a call to
2817 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2818 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2819 was a macro that became an assignment, so it seemed to work. This has
2820 changed to a proper function call with a void return, hence the compile
2821 error. Exim's code has been fixed.
2823 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2826 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2828 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2830 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2831 because it turns out to be too big or there is a timeout) there is no
2832 "Completed" line in the log. When some messages of this type were
2833 selected by exigrep, they were listed as "not completed". Others were
2834 picked up by some special patterns. I have improved the selection
2835 criteria to be more general.
2837 PH/38 The host_find_failed option in the manualroute router can now be set
2838 to "ignore", to completely ignore a host whose IP address cannot be
2839 found. If all hosts are ignored, the behaviour is controlled by the new
2840 host_all_ignored option.
2842 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2843 homing or because of multiple MX records with /mx) generated more than
2844 one IP address, and the following item turned out to be the local host,
2845 all the secondary addresses of the first item were incorrectly removed
2846 from the list, along with the local host and any following hosts (which
2847 is what is supposed to happen).
2849 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2850 whoever called Exim into the -H file. In the case of the daemon it was
2851 behaving confusingly. When first started, it used values for whoever
2852 started the daemon, but after a SIGHUP it used the Exim user (because it
2853 calls itself on a restart). I have changed the code so that it now always
2856 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2857 message are rejected with the same error (e.g. no authentication or bad
2858 sender address), and a DATA command is nevertheless sent (as can happen
2859 with PIPELINING or a stupid MUA), the error message that was given to the
2860 RCPT commands is included in the rejection of the DATA command. This is
2861 intended to be helpful for MUAs that show only the final error to their
2864 PH/42 Another patch from the Sieve maintainer.
2866 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2867 Eximstats - Fixed some broken HTML links and added missing column headers
2869 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2870 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2872 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2874 PH/43 Yet another patch from the Sieve maintainer.
2876 PH/44 I found a way to check for a TCP/IP connection going away before sending
2877 the response to the final '.' that terminates a message, but only in the
2878 case where the client has not sent further data following the '.'
2879 (unfortunately, this is allowed). However, in many cases there won't be
2880 any further data because there won't be any more messages to send. A call
2881 to select() can be used: if it shows that the input is "ready", there is
2882 either input waiting, or the socket has been closed. An attempt to read
2883 the next input character can distinguish the two cases. Previously, Exim
2884 would have sent an OK response which the client would never have see.
2885 This could lead to message repetition. This fix should cure that, at
2886 least in a lot of common cases.
2888 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2889 advertised in response to EHLO.
2895 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2896 fixed by 4.65/MH/01 (is this a record?) are fixed:
2898 (i) An empty string was always treated as zero by the numeric comparison
2899 operators. This behaviour has been restored.
2901 (ii) It is documented that the numeric comparison operators always treat
2902 their arguments as decimal numbers. This was broken in that numbers
2903 starting with 0 were being interpreted as octal.
2905 While fixing these problems I realized that there was another issue that
2906 hadn't been noticed. Values of message_size_limit (both the global option
2907 and the transport option) were treated as octal if they started with 0.
2908 The documentation was vague. These values are now always treated as
2909 decimal, and I will make that clear in the documentation.
2915 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2916 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2919 MH/01 Don't check that the operands of numeric comparison operators are
2920 integers when their expansion is in "skipping" mode (fixes bug
2921 introduced by 4.64-PH/07).
2923 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2924 child addresses, Exim now panics and dies. Previously, because the count
2925 is held in a short int, deliveries were likely to be lost. As such a
2926 large number of recipients for a single message is ridiculous
2927 (performance will be very, very poor), I have chosen to impose a limit
2928 rather than extend the field.
2934 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2935 leftover -K file (the existence of which was triggered by #402).
2936 While we were at it, introduced process PID as part of the -K
2937 filename. This should rule out race conditions when creating
2940 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2941 processing considerably. Previous code took too long for large mails,
2942 triggering a timeout which in turn triggers #401.
2944 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2945 in the DK code in transports.c. sendfile() is not really portable,
2946 hence the _LINUX specificness.
2948 TF/01 In the add_headers option to the mail command in an Exim filter,
2949 there was a bug that Exim would claim a syntax error in any
2950 header after the first one which had an odd number of characters
2953 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2954 callout verification, Exim cached a "reject" for the entire domain. This
2955 is correct for most verifications, but it is not correct for a recipient
2956 verification with use_sender or use_postmaster set, because in that case
2957 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2958 case of MAIL FROM:<> rejection from other early rejections (e.g.
2959 rejection of HELO). When verifying a recipient using a non-null MAIL
2960 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2961 Whatever the result of the callout, the value of the domain cache is
2962 left unchanged (for any other kind of callout, getting as far as trying
2963 RCPT means that the domain itself is ok).
2965 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2968 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2969 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2970 session, the daemon ignores ECONNECT errors and logs others; it now
2971 ignores EPIPE as well.
2973 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2974 (quoted-printable decoding).
2976 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2977 later the small subsequent patch to fix an introduced bug.
2979 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2981 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2983 PH/08 An error is now given if message_size_limit is specified negative.
2985 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2986 to be given (somewhat) arbitrary names.
2988 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2991 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2992 miscellaneous code fixes
2994 PH/10 Added the log_reject_target ACL modifier to specify where to log
2997 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2998 hostname. This is wrong, because it relates to the incoming message (and
2999 probably the interface on which it is arriving) and not to the outgoing
3000 callout (which could be using a different interface). This has been
3001 changed to use the value of the helo_data option from the smtp transport
3002 instead - this is what is used when a message is actually being sent. If
3003 there is no remote transport (possible with a router that sets up host
3004 addresses), $smtp_active_hostname is used.
3006 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3007 tweaks were necessary in order to get it to work (see also 21 below):
3008 (a) The code assumed that strncpy() returns a negative number on buffer
3009 overflow, which isn't the case. Replaced with Exim's string_format()
3011 (b) There were several signed/unsigned issues. I just did the minimum
3012 hacking in of casts. There is scope for a larger refactoring.
3013 (c) The code used strcasecmp() which is not a standard C function.
3014 Replaced with Exim's strcmpic() function.
3015 (d) The code set only $1; it now sets $auth1 as well.
3016 (e) A simple test gave the error "authentication client didn't specify
3017 service in request". It would seem that Dovecot has changed its
3018 interface. Fortunately there's a specification; I followed it and
3019 changed what the client sends and it appears to be working now.
3021 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3024 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3025 address A is aliased to B and C, where B exists and C does not. Without
3026 -v the output is "A verified" because verification stops after a
3027 successful redirection if more than one address is generated. However,
3028 with -v the child addresses are also verified. Exim was outputting "A
3029 failed to verify" and then showing the successful verification for C,
3030 with its parentage. It now outputs "B failed to verify", showing B's
3031 parentage before showing the successful verification of C.
3033 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3034 look up a TXT record in a specific list after matching in a combined
3037 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3038 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3039 they consult the DNS. I had assumed they would set it the way they
3040 wanted; and indeed my experiments on Linux seem to show that in some
3041 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3042 To be on the safe side, however, I have now made the interface to
3043 host_find_byname() similar to host_find_bydns(), with an argument
3044 containing the DNS resolver options. The host_find_byname() function now
3045 sets these options at its start, just as host_find_bydns() does. The smtp
3046 transport options dns_qualify_single and dns_search_parents are passed to
3047 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3048 of host_find_byname() use the default settings of RES_DEFNAMES
3049 (qualify_single) but not RES_DNSRCH (search_parents).
3051 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3052 spool_read_header() do less string testing, by means of a preliminary
3053 switch on the second character of optional "-foo" lines. (This is
3054 overdue, caused by the large number of possibilities that now exist.
3055 Originally there were few.) While I was there, I also converted the
3056 str(n)cmp tests so they don't re-test the leading "-" and the first
3057 character, in the hope this might squeeze out yet more improvement.
3059 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3060 flag allowing group syntax was set by the header_syntax check but not
3061 turned off, possible causing trouble later; (2) The flag was not being
3062 set at all for the header_verify test, causing "group"-style headers to
3063 be rejected. I have now set it in this case, and also caused header_
3064 verify to ignore an empty address taken from a group. While doing this, I
3065 came across some other cases where the code for allowing group syntax
3066 while scanning a header line wasn't quite right (mostly, not resetting
3067 the flag correctly in the right place). These bugs could have caused
3068 trouble for malformed header lines. I hope it is now all correct.
3070 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3071 with the "reply" argument non-NULL. The code, however (which originally
3072 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3073 but it didn't always do it. This confused somebody who was copying the
3074 code for some other use. I have removed all the tests.
3076 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3077 feature that was used to support insecure browsers during the U.S. crypto
3078 embargo. It requires special client support, and Exim is probably the
3079 only MTA that supported it -- and would never use it because real RSA is
3080 always available. This code has been removed, because it had the bad
3081 effect of slowing Exim down by computing (never used) parameters for the
3082 RSA_EXPORT functionality.
3084 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3085 authenticator to fail if there's a tab character in the incoming data
3086 (there should never be unless someone is messing about, as it's supposed
3087 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3088 if the connection is using TLS or if the remote IP is the same as the
3089 local IP, and the "valid-client-cert option" if a client certificate has
3092 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3093 authenticators. This can be used for authorization after authentication
3094 succeeds. (In the case of plaintext, it servers for both authentication
3097 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3098 if any retry times were supplied.
3100 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3101 connection, where there is no client IP address to check. In this
3102 situation, the verify now always succeeds.
3104 PH/25 Applied John Jetmore's -Mset patch.
3106 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3108 PH/27 In a string expansion for a processed (not raw) header when multiple
3109 headers of the same name were present, leading whitespace was being
3110 removed from all of them, but trailing whitespace was being removed only
3111 from the last one. Now trailing whitespace is removed from each header
3112 before concatenation. Completely empty headers in a concatenation (as
3113 before) are ignored.
3115 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3116 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3118 PH/29 [Removed. This was a change that I later backed out, and forgot to
3119 correct the ChangeLog entry (that I had efficiently created) before
3120 committing the later change.]
3122 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3123 address errors (4xx response to RCPT) over the same connection as other
3124 messages routed to the same hosts. Such deliveries are always "forced",
3125 so retry times are not inspected. This resulted in far too many retries
3126 for the affected addresses. The effect occurred only when there were more
3127 hosts than the hosts_max_try setting in the smtp transport when it had
3128 the 4xx errors. Those hosts that it had tried were not added to the list
3129 of hosts for which the message was waiting, so if all were tried, there
3130 was no problem. Two fixes have been applied:
3132 (i) If there are any address or message errors in an SMTP delivery, none
3133 of the hosts (tried or untried) are now added to the list of hosts
3134 for which the message is waiting, so the message should not be a
3135 candidate for sending over the same connection that was used for a
3136 successful delivery of some other message. This seems entirely
3137 reasonable: after all the message is NOT "waiting for some host".
3138 This is so "obvious" that I'm not sure why it wasn't done
3139 previously. Hope I haven't missed anything, but it can't do any
3140 harm, as the worst effect is to miss an optimization.
3142 (ii) If, despite (i), such a delivery is accidentally attempted, the
3143 routing retry time is respected, so at least it doesn't keep
3144 hammering the server.
3146 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3147 in ${readsocket because some servers need this prod.
3149 PH/32 Added some extra debug output when updating a wait-xxx database.
3151 PH/33 The hint "could be header name not terminated by colon", which has been
3152 given for certain expansion errors for a long time, was not being given
3153 for the ${if def:h_colon_omitted{... case.
3155 PH/34 The spec says: "With one important exception, whenever a domain list is
3156 being scanned, $domain contains the subject domain." There was at least
3157 one case where this was not true.
3159 PH/35 The error "getsockname() failed: connection reset by peer" was being
3160 written to the panic log as well as the main log, but it isn't really
3161 panic-worthy as it just means the connection died rather early on. I have
3162 removed the panic log writing for the ECONNRESET error when getsockname()
3165 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3166 runs only) independently of the message's sender address. This meant
3167 that, if the 4xx error was in fact related to the sender, a different
3168 message to the same recipient with a different sender could confuse
3169 things. In particular, this can happen when sending to a greylisting
3170 server, but other circumstances could also provoke similar problems.
3171 I have changed the default so that the retry time for these errors is now
3172 based a combination of the sender and recipient addresses. This change
3173 can be overridden by setting address_retry_include_sender=false in the
3176 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3177 remote server are returned as part of bounce messages. This was not
3178 happening for LMTP over a pipe (the lmtp transport), but now it is the
3179 same for both kinds of LMTP.
3181 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3182 in header lines that were in fact CNAMEs. This is no longer the case.
3184 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3185 and queue runs started by the daemon processed all messages. This has
3186 been fixed so that -R and -S can now usefully be given with -q<time>.
3188 PH/40 Import PCRE release 6.7 (fixes some bugs).
3190 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3192 PH/42 Give an error if -q is specified more than once.
3194 PH/43 Renamed the variables $interface_address and $interface_port as
3195 $received_ip_address and $received_port, to make it clear that these
3196 values apply to message reception, and not to the outgoing interface when
3197 a message is delivered. (The old names remain recognized, of course.)
3199 PH/44 There was no timeout on the connect() call when using a Unix domain
3200 socket in the ${readsocket expansion. There now is.
3202 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3203 be meaningful with "accept".
3205 SC/01 Eximstats V1.43
3206 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3208 SC/02 Eximstats V1.44
3209 Use a glob alias rather than an array ref in the generated
3210 parser. This improves both readability and performance.
3212 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3213 Collect SpamAssassin and rejection statistics.
3214 Don't display local sender or destination tables unless
3215 there is data to show.
3216 Added average volumes into the top table text output.
3218 SC/04 Eximstats V1.46
3219 Collect data on the number of addresses (recipients)
3220 as well as the number of messages.
3222 SC/05 Eximstats V1.47
3223 Added 'Message too big' to the list of mail rejection
3224 reasons (thanks to Marco Gaiarin).
3226 SC/06 Eximstats V1.48
3227 Mainlog lines which have GMT offsets and are too short to
3228 have a flag are now skipped.
3230 SC/07 Eximstats V1.49 (Alain Williams)
3231 Added the -emptyok flag.
3233 SC/08 Eximstats V1.50
3234 Fixes for obtaining the IP address from reject messages.
3236 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3237 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3238 whitespace changes from 4.64-PH/27
3240 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3243 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3244 are found, allow negative numbers in numeric criteria)
3246 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3248 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3249 to match changes made in 4.64-PH/43
3251 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3253 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3254 "domain" is actually an IP address, and force a failure. This locks out
3255 those revolvers/nameservers that support "A-for-A" lookups, in
3256 contravention of the specifications.
3258 PH/48 When a host name was looked up from an IP address, and the subsequent
3259 forward lookup of the name timed out, the host name was left in
3260 $sender_host_name, contrary to the specification.
3262 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3263 restricted to single-key lookups, Exim was not diagnosing an error if
3264 * or *@ was used with a query-style lookup.
3266 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3268 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3269 long ago, but noone interested enough thought of it. Let's just say that
3270 the "1.1" means that there are some new functions that weren't there at
3271 some point in the past.
3273 PH/51 Error processing for expansion failure of helo_data from an smtp
3274 transport during callout processing was broken.
3276 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3277 tested/used via the -bh/-bhc/-bs options.
3279 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3280 bug, fixed in subsequent PCRE releases).
3282 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3283 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3285 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3291 SC/01 Use a glob alias rather than an array ref in eximstats generated
3292 parser. This improves both readability and performance.
3294 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3295 Don't display local sender or destination tables in eximstats unless
3296 there is data to show.
3297 Added average volumes into the eximstats top table text output.
3299 SC/03 Collect data on the number of addresses (recipients) as well
3300 as the number of messages in eximstats.
3302 TF/01 Correct an error in the documentation for the redirect router. Exim
3303 does (usually) call initgroups() when daemonizing.
3305 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3306 with consistent privilege compared to when running as a daemon.
3308 TF/03 Note in the spec that $authenticated_id is not set for local
3309 submissions from trusted users.
3311 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3312 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3314 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3315 by adding some example configuration directives to the default
3316 configuration file. A little bit of work is required to uncomment the
3317 directives and define how usernames and passwords are checked, but
3318 there is now a framework to start from.
3320 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3321 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3322 without this. I don't know how relevant this is to other LDAP libraries.
3324 PH/02 Add the verb name to the "unknown ACL verb" error.
3326 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3328 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3330 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3331 directory not expanded when it should be if an expanded home directory
3332 was set for the address (which is overridden by the transport).
3334 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3337 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3338 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3339 because it is too late at that time, and has no effect.
3341 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3342 security issue with \' (bugzilla #107). I could not use the
3343 PQescapeStringConn() function, because it needs a PGconn value as one of
3346 PH/08 When testing addresses using -bt, indicate those final addresses that
3347 are duplicates that would not cause an additional delivery. At least one
3348 person was confused, thinking that -bt output corresponded to deliveries.
3349 (Suppressing duplicates isn't a good idea as you lose the information
3350 about possibly different redirections that led to the duplicates.)
3352 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3353 systems where poll() doesn't work, in particular OS X.
3355 PH/10 Added more information to debugging output for retry time not reached.
3357 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3358 operations in malware.c.
3360 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3363 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3364 syslog_duplication set false, log lines that would normally be written
3365 both the the main log and to the reject log were not written to syslog at
3368 PH/14 In the default configuration, change the use of "message" in ACL warn
3369 statements to "add_header".
3371 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3372 not followed by a command (e.g. "seen endif").
3374 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3375 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3378 PH/17 Added extra conditions to the default value of delay_warning_condition
3382 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3383 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3384 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3387 The Auto-Submitted: and various List- headers are standardised, whereas I
3388 don't think Precedence: ever was.
3390 PH/18 Refactored debugging code in route_finduser() to show more information,
3391 in particular, the error code if getpwnam() issues one.
3393 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3394 This is apparently needed in addition to the PH/07 change above to avoid
3395 any possible encoding problems.
3397 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3398 but not after initializing Perl.
3400 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3401 output them only if debugging. By default they are written stderr,
3402 apparently, which is not desirable.
3404 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3407 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3410 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3412 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3413 authenticated or an ident call has been made. Suppress the default
3414 values for $authenticated_id and $authenticated_sender (but permit -oMai
3415 and -oMas) when testing with -bh.
3417 PH/24 Re-jigged the order of the tests in the default configuration so that the
3418 tests for valid domains and recipients precede the DNS black list and CSA
3419 tests, on the grounds that those ones are more expensive.
3421 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3422 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3423 This bug exists in every version of Exim that I still have, right back to
3426 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3427 However, an attempt to turn on case-sensitivity in a regex key by
3428 including (?-i) didn't work because the subject string was already
3429 lowercased, and the effects were non-intuitive. It turns out that a
3430 one-line patch can be used to allow (?-i) to work as expected.
3436 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3437 other effects) broke the use of negated acl sub-conditions.
3439 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3442 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3443 "Deny" causes Exim to reject the incoming connection with a 554 error.
3444 Unfortunately, if there is a major crisis, such as a disk failure,
3445 tcp-wrappers gives "deny", whereas what one would like would be some
3446 kind of temporary error. A kludge has been added to help with this.
3447 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3448 554 error is used if errno is still zero or contains ENOENT (which occurs
3449 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3452 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3454 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3455 errors. Otherwise a message that provokes a temporary error (when other
3456 messages do not) can cause a whole host to time out.
3458 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3459 addresses were routed directly to files or pipes from a redirect router.
3460 File deliveries just didn't batch; pipe deliveries might have suffered
3463 PH/06 A failure to get a lock for a hints database would erroneously always say
3464 "Failed to get write lock", even when it was really a read lock.
3466 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3467 of 0600. This has been changed to use the value of the lockfile_mode
3468 option (which defaults to 0600).
3470 PH/08 Applied small patch from the Sieve maintainer.
3472 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3473 folder from quota calculations, a direct delivery into this folder messed
3474 up the contents of the maildirsize file. This was because the regex was
3475 used only to exclude .Trash (or whatever) when the size of the mailbox
3476 was calculated. There was no check that a delivery was happening into an
3477 excluded directory. This bug has been fixed by ignoring all quota
3478 processing for deliveries into excluded directories.
3480 PH/10 Added the maildirfolder_create_regex option to appendfile.
3486 PH/01 The code for finding all the local interface addresses on a FreeBSD
3487 system running IPv6 was broken. This may well have applied to all BSD
3488 systems, as well as to others that have similar system calls. The broken
3489 code found IPv4 interfaces correctly, but gave incorrect values for the
3490 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3491 that it would not match correctly against @[] and not recognize the IPv6
3494 PH/02 The ipliteral router was not recognizing addresses of the form user@
3495 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3497 PH/03 Added disable_ipv6.
3499 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3500 decoded form, because it is most often used to construct To: headers
3501 lines in autoreplies, and the decoded form may well be syntactically
3502 invalid. However, $reply_address has leading white space removed, and all
3503 newlines turned into spaces so that the autoreply transport does not
3506 PH/05 If group was specified without a user on a router, and no group or user
3507 was specified on a transport, the group from the router was ignored.
3509 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3510 for visible compile-time settings that can be used to change these
3511 numbers, for those that want even more. Backwards compatibility with old
3512 spool files has been maintained. However, going back to a previous Exim
3513 release will lost any variables that are in spool files.
3515 PH/07 Two small changes when running in the test harness: increase delay when
3516 passing a TCP/IP connection to a new process, in case the original
3517 process has to generate a bounce, and remove special handling of
3518 127.0.0.2 (sic), which is no longer necessary.
3520 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3521 be the same on different OS.
3523 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3526 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3527 whether --show-vars was specified or not
3529 JJ/02 exipick: Added support for new ACL variable spool format introduced
3532 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3533 syntactically invalid From: or Reply-to: line, and a filter used this to
3534 generate an autoreply, and therefore failed to obtain an address for the
3535 autoreply, Exim could try to deliver to a non-existent relative file
3536 name, causing unrelated and misleading errors. What now happens is that
3537 it logs this as a hard delivery error, but does not attempt to create a
3540 PH/11 The exinext utility has a -C option for testing purposes, but although
3541 the given file was scanned by exinext itself; it wasn't being passed on
3542 when Exim was called.
3544 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3545 an end-of-file indication when reading a command response.
3547 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3548 compiled. In many other places in Exim, IPv6 addresses are always
3549 recognized, so I have changed this. It also means that IPv4 domain
3550 literals of the form [IPV4:n.n.n.n] are now always recognized.
3552 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3553 used if the router is not running as root, for example, when verifying at
3554 ACL time, or when using -bh. The debugging output from this situation was
3555 non-existent - all you got was a failure to exec. I have made two
3558 (a) Failures to set uid/gid, the current directory, or a process leader
3559 in a subprocess such as that created by queryprogram now generate
3560 suitable debugging output when -d is set.
3562 (b) The queryprogram router detects when it is not running as root,
3563 outputs suitable debugging information if -d is set, and then runs
3564 the subprocess without attempting to change uid/gid.
3566 PH/15 Minor change to Makefile for building test_host (undocumented testing
3569 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3570 additional section of a DNS packet that returns MX or SRV records.
3571 Instead, it always explicitly searches for A/AAAA records. This avoids
3572 major problems that occur when a DNS server includes only records of one
3573 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3574 fixed another bug: if SRV records were looked up and the corresponding
3575 address records were *not* found in the additional section, the port
3576 values from the SRV records were lost.
3578 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3579 using the correct key (the original address) when searching the retry
3580 rules in order to find which one to use for generating the retry hint.
3582 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3583 adding the default one. Similarly, if it contains a Reply-To: header, the
3584 errors_reply_to option, if set, is not used.
3586 PH/19 When calculating a retry time, Exim used to measure the "time since
3587 failure" by looking at the "first failed" field in the retry record. Now
3588 it does not use this if it is later than than the arrival time of the
3589 message. Instead it uses the arrival time. This makes for better
3590 behaviour in cases where some deliveries succeed, thus re-setting the
3591 "first failed" field. An example is a quota failure for a huge message
3592 when small messages continue to be delivered. Without this change, the
3593 "time since failure" will always be short, possible causing more frequent
3594 delivery attempts for the huge message than are intended.
3595 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3597 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3598 $1, $2, $3) because the numerical variables can be reset during some
3599 expansion items (e.g. "match"), thereby losing the authentication data.
3601 PH/21 Make -bV show the size of off_t variables so that the test suite can
3602 decide whether to run tests for quotas > 2G.
3604 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3605 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3606 filecount value is greater than 2G or if a quota value is greater than 2G
3607 on a system where the size of off_t is not greater than 4, a panic error
3610 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3611 never match. The debug and -bh output now contains an explicit error
3612 message indicating a malformed IPv4 address or mask.
3614 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3615 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3616 PH/23 above applies.
3618 PH/25 Do not write to syslog when running in the test harness. The only
3619 occasion when this arises is a failure to open the main or panic logs
3620 (for which there is an explicit test).
3622 PH/26 Added the /no_tell option to "control=freeze".
3624 PH/27 If a host name lookup failed very early in a connection, for example, if
3625 the IP address matched host_lookup and the reverse lookup yielded a name
3626 that did not have a forward lookup, an error message of the form "no IP
3627 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3628 could be logged. Now it outputs the IP address instead of "NULL".
3630 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3631 allows the sender and the authenticated sender to be set when
3632 submitting a message from within Exim. Since child_open_exim() is
3633 documented for local_scan(), the new function should be too.
3635 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3636 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3637 results in an empty string is now treated as unset.
3639 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3641 PH/31 Added sender_verify_fail logging option.
3643 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3644 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3645 tidied the source and removed it altogether.
3647 PH/33 When a queue run was abandoned because the load average was too high, a
3648 log line was always written; now it is written only if the queue_run log
3649 selector is set. In addition, the log line for abandonment now contains
3650 information about the queue run such as the pid. This is always present
3651 in "start" and "stop" lines but was omitted from the "abandon" line.
3653 PH/34 Omit spaces between a header name and the colon in the error message that
3654 is given when verify = headers_syntax fails (if there are lots of them,
3655 the message gets confusing).
3657 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3658 names, as there are now some PTR records that contain slashes. This check
3659 is only to protect against broken name servers that fall over on strange
3660 characters, so the fact that it applies to all lookups doesn't matter.
3662 PH/36 Now that the new test suite is complete, we can remove some of the
3663 special code in Exim that was needed for the old test suite. For example,
3664 sorting DNS records because real resolvers return them in an arbitrary
3665 order. The new test suite's fake resolver always returns records in the
3668 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3669 bounces) except when queue_only is set, to avoid logging races between
3670 the different processes.
3672 PH/38 Panic-die if .include specifies a non-absolute path.
3674 PH/39 A tweak to the "H" retry rule from its user.
3676 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3677 a label. They prevented compilation on older perls.
3679 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3680 a warning to be raised on newish perls.
3682 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3683 on queue. Changes to match documented behaviour of showing count of
3684 messages matching specified criteria.
3686 PH/40 Changed the default ident timeout from 30s to 5s.
3688 PH/41 Added support for the use of login_cap features, on those BSD systems
3689 that have them, for controlling the resources used by pipe deliveries.
3691 PH/42 The content-scanning code uses fopen() to create files in which to put
3692 message data. Previously it was not paying any attention to the mode of
3693 the files. Exim runs with umask(0) because the rest of the code creates
3694 files with open(), and sets the required mode explicitly. Thus, these
3695 files were ending up world-writeable. This was not a big issue, because,
3696 being within the spool directory, they were not world-accessible. I have
3697 created a function called modefopen, which takes an additional mode
3698 argument. It sets umask(777), creates the file, chmods it to the required
3699 mode, then resets the umask. All the relevant calls to fopen() in the
3700 content scanning code have been changed to use this function.
3702 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3703 to 24 hours. This avoids potential overflow problems when processing G
3704 and H retry rules. I suspect nobody ever tinkers with this value.
3706 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3708 PH/45 When the plaintext authenticator is running as a client, the server's
3709 challenges are checked to ensure they are valid base64 strings. By
3710 default, the authentication attempt is cancelled if an invalid string is
3711 received. Setting client_ignore_invalid_base64 true ignores these errors.
3712 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3713 they are received. Thus, the responses can be made to depend on the
3714 challenges. If an invalid string is ignored, an empty string is placed in
3717 PH/46 Messages that are created by the autoreply transport now contains a
3718 References: header, in accordance with RFCs 2822 and 3834.
3720 PH/47 Added authenticated_sender_force to the smtp transport.
3722 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3724 PH/49 Installed latest patch from the Sieve maintainer.
3726 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3727 was also set, the appendfile transport was unnecessarily scanning a
3728 directory of message files (e.g. for maildir delivery) to find the count
3729 of files (along with the size), even though it did not need this
3730 information. It now does the scan only if it needs to find either the
3731 size of the count of files.
3733 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3735 PH/52 Two bugs concerned with error handling when the smtp transport is
3738 (i) Exim was not creating retry information for temporary errors given
3739 for individual recipients after the DATA command when the smtp transport
3740 was used in LMTP mode. This meant that they could be retried too
3741 frequently, and not timed out correctly.
3743 (ii) Exim was setting the flag that allows error details to be returned
3744 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3745 recipients that were returned after the DATA command.
3747 PH/53 This is related to PH/52, but is more general: for any failing address,
3748 when detailed error information was permitted to be returned to the
3749 sender, but the error was temporary, then after the final timeout, only
3750 "retry timeout exceeded" was returned. Now it returns the full error as
3751 well as "retry timeout exceeded".
3753 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3754 do this, and (what is worse) MTAs that accept it.
3756 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3757 will now be deprecated.
3759 PH/56 New os.c-cygwin from the Cygwin maintainer.
3761 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3762 formats (previously only available in exim formats via -bpr, -bpru,
3763 and -bpra. Now also available in native and exiqgrep formats)
3765 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3766 with very large, slow to parse queues
3768 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3770 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3772 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3773 responses to authentication challenges, though it was showing the
3774 challenges; (ii) I've removed the CR characters from the debug output for
3777 PH/58 Allow for the insertion of a newline as well as a space when a string
3778 is turned into more than one encoded-word during RFC 2047 encoding. The
3779 Sieve code now uses this.
3781 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3782 data_4xx, lost_connection, tls_required.
3784 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3785 message was being sent as an SMTP response.
3787 PH/61 Add -l and -k options to exicyclog.
3789 PH/62 When verifying, if an address was redirected to one new address, so that
3790 verification continued, and the new address failed or deferred after
3791 having set something in $address_data, the value of $address_data was not
3792 passed back to the ACL. This was different to the case when no
3793 redirection occurred. The value is now passed back in both cases.
3795 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3796 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3797 use login_cap.h, so on its own it isn't the distinguishing feature. The
3798 new name refers directly to the setclassresources() function.
3800 PH/65 Added configuration files for NetBSD3.
3802 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3804 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3805 is preferred over IPv4.
3807 PH/68 The bounce_return_message and bounce_return_body options were not being
3808 honoured for bounces generated during the reception of non-SMTP messages.
3809 In particular, this applied to messages rejected by the ACL. This bug has
3810 been fixed. However, if bounce_return_message is true and bounce_return_
3811 body is false, the headers that are returned for a non-SMTP message
3812 include only those that have been read before the error was detected.
3813 (In the case of an ACL rejection, they have all been read.)
3815 PH/69 The HTML version of the specification is now built in a directory called
3816 spec_html instead of spec.html, because the latter looks like a path with
3817 a MIME-type, and this confuses some software.
3819 PH/70 Catch two compiler warnings in sieve.c.
3821 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3822 function verify_get_ident() calls ip_connect() to connect a socket, but
3823 if the "connect()" function timed out, ip_connect() used to close the
3824 socket. However, verify_get_ident() also closes the socket later, and in
3825 between Exim writes to the log, which may get opened at this point. When
3826 the socket was closed in ip_connect(), the log could get the same file
3827 descriptor number as the socket. This naturally causes chaos. The fix is
3828 not to close the socket in ip_connect(); the socket should be closed by
3829 the function that creates it. There was only one place in the code where
3830 this was missing, in the iplookup router, which I don't think anybody now
3831 uses, but I've fixed it anyway.
3833 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3834 well as to direct DNS lookups. Otherwise the handling of names in host
3835 lists is inconsistent and therefore confusing.
3841 PH/01 Two changes to the default runtime configuration:
3843 (1) Move the checks for relay_from_hosts and authenticated clients from
3844 after to before the (commented out) DNS black list checks.
3846 (2) Add control=submission to the relay_from_hosts and authenticated
3847 clients checks, on the grounds that messages accepted by these
3848 statements are most likely to be submissions.
3850 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3852 (1) Generate an error if the third argument for the ${prvs expansion is
3855 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3858 (3) Reset the variables that are obtained from the first argument of
3859 ${prvscheck and used in the second argument before leaving the code,
3860 because their memory is reclaimed, so using them afterwards may do
3863 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3864 one (it's much easier than Tom thought :-).
3866 (5) Because of (4), we can now allow for the use of $prvscheck_result
3867 inside the third argument.
3869 PH/03 For some reason, the default setting of PATH when running a command from
3870 a pipe transport was just "/usr/bin". I have changed it to
3873 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3874 anything to be listed in the output from -bV.
3876 PH/05 When a filter generated an autoreply, the entire To: header line was
3877 quoted in the delivery log line, like this:
3879 => >A.N.Other <ano@some.domain> <original@ddress> ...
3881 This has been changed so that it extracts the operative address. There
3882 may be more than one such address. If so, they are comma-separated, like
3885 => >ano@some.domain,ona@other.domain <original@ddress> ...
3887 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3888 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3889 not being looked up in the rDNS to get a host name, Exim was showing the
3890 IP address twice in Received: lines, even though the IP addresses were
3891 identical. For example:
3893 Received: from [1.2.3.4] (helo=[1.2.3.4])
3895 However, if the real host name was known, it was omitting the HELO data
3896 if it matched the actual IP address. This has been tidied up so that it
3897 doesn't show the same IP address twice.
3899 PH/07 When both +timestamp and +memory debugging was on, the value given by
3900 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3901 called by the debug printing, thereby overwriting the timestamp buffer.
3902 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3904 PH/08 When the original message was included in an autoreply transport, it
3905 always said "this is a copy of the message, including all the headers",
3906 even if body_only or headers_only was set. It now gives an appropriate
3909 PH/09 Applied a patch from the Sieve maintainer which:
3911 o fixes some comments
3912 o adds the (disabled) notify extension core
3913 o adds some debug output for the result of if/elsif tests
3914 o points to the current vacation draft in the documentation
3915 and documents the missing references header update
3919 o fixes a bug in processing the envelope test (when testing
3920 multiple envelope elements, the last element determined the
3923 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3924 Electronic Mail") by including:
3926 Auto-submitted: auto-generated
3928 in the messages that it generates (bounce messages and others, such as
3929 warnings). In the case of bounce messages for non-SMTP messages, there was
3930 also a typo: it was using "Auto_submitted" (underscore instead of
3931 hyphen). Since every message generated by Exim is necessarily in response
3932 to another message, thes have all been changed to:
3934 Auto-Submitted: auto-replied
3936 in accordance with these statements in the RFC:
3938 The auto-replied keyword:
3940 - SHOULD be used on messages sent in direct response to another
3941 message by an automatic process,
3943 - MUST NOT be used on manually-generated messages,
3945 - MAY be used on Delivery Status Notifications (DSNs) and Message
3946 Disposition Notifications (MDNs),
3948 - MUST NOT be used on messages generated by automatic or periodic
3949 processes, except for messages which are automatic responses to
3952 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3953 to the default Received: header definition.
3955 PH/12 Added log selector acl_warn_skipped (default on).
3957 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3958 variables because (a) they are in the wrong storage pool and (b) even if
3959 they were copied, it wouldn't work properly because of the caching.
3961 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3962 checking when decoding. Apparently there are clients that generate
3963 overlong encoded strings. Why am I not surprised?
3965 PH/15 If the first argument of "${if match_address" was not empty, but did not
3966 contain an "@" character, Exim crashed. Now it writes a panic log message
3967 and treats the condition as false.
3969 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3971 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3972 extension "envelope-auth". The code is finished and in agreement with
3973 other implementations, but there is no documentation so far and in fact,
3974 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3975 not changing the active code.
3977 Print executed "if" and "elsif" statements when debugging is used. This
3978 helps a great deal to understand what a filter does.
3980 Document more things not specified clearly in RFC3028. I had all this
3981 sorted out, when out of a sudden new issues came to my mind. Oops."
3983 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3986 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3987 canonical form (as documented). However, after a host name lookup from
3988 the IP address, check_host() was doing a simple string comparison with
3989 addresses acquired from the DNS when checking that the found name did
3990 have the original IP as one of its addresses. Since any found IPv6
3991 addresses are likely to be in abbreviated form, the comparison could
3992 fail. Luckily, there already exists a function for doing the comparison
3993 by converting both addresses to binary, so now that is used instead of
3994 the text comparison.
3996 PH/20 There was another similar case to PH/19, when a complete host name was
3997 given in a host list; looking up its IP address could give an abbreviated
3998 form, whereas the current host's name might or might not be abbreviated.
3999 The same fix has been applied.
4005 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4006 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4009 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4010 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4012 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4014 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4015 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4016 Also, for "Auto-Submitted", treat anything other than "no" as
4017 non-personal, in accordance with RFC 3834. (Previously it treated
4018 anything starting "auto-" as non-personal.)
4020 TF/01 The control=submission/name=... option had a problem with syntax
4021 errors if the name included a slash character. The /name= option
4022 now slurps the rest of the string, so it can include any characters
4023 but it must come last in the list of options (after /sender_retain
4026 PH/05 Some modifications to the interface to the fake nameserver for the new
4034 TK/01 Added the "success_on_redirect" address verification option. See
4035 NewStuff for rationale and an example.
4037 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4039 PH/02 Patch to exigrep to allow it to work on syslog lines.
4041 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4042 fread() to skip over the body file's header line, because in Cygwin the
4043 header line is locked and is inaccessible.
4045 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4046 co-exist for some time) to make it clear that it is the Exim ID that is
4047 referenced, not the Message-ID: header line.
4049 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4050 string_format() function, because snprintf() does not exist on all
4053 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4054 ${stat: expansion item.
4056 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4057 protocol synchronization error", to keep the pedants happy.
4059 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4060 well as for IRIX systems, when gcc is being used. See the host.c source
4063 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4065 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4068 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4069 transport and to the smtp transport in LMTP mode.
4071 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4073 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4074 run a filter in a subprocess. This could lead to confusion in subsequent
4075 lookups in the parent process. There should also be a search_tidyup() at
4076 the end of the subprocess.
4078 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4079 only if the host matched helo_try_verify_hosts, which caused the
4080 verification to occur when the EHLO/HELO command was issued. The ACL just
4081 tested the remembered result. Now, if a previous verification attempt has
4082 not happened, "verify = helo" does it there and then.
4084 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4086 TK/03 Fix log output including CR from clamd.
4088 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4089 exist provoked a memory error which could cause a segfault.
4091 PH/15 Installed PCRE 6.2
4093 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4095 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4096 of the problem. Specifically, suggested +O2 rather than +O1 for the
4099 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4101 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4102 record, the port was not correctly logged when the outgoing_port log
4103 selector was set (it logged the transort's default port).
4105 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4106 fallback_hosts, and "hosts" in the smtp transport.
4108 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4109 host errors such as "Connection refused".
4111 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4112 authentication with radiusclient 0.4.9:
4114 - Error returned from rc_read_config was caught wrongly
4115 - Username/password not passed on to radius server due to wrong length.
4117 The presumption is that some radiusclient API changes for 4.51/PH/17
4118 were not taken care of correctly. The code is still untested by me (my
4119 Linux distribution still has 0.3.2 of radiusclient), but it was
4120 contributed by a Radius user.
4122 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4123 expanding the "port" option of the smtp transport.
4125 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4126 while reading a MIME header. Thanks to Tom Hughes for a patch.
4128 PH/24 Include config.h inside local_scan.h so that configuration settings are
4131 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4132 that in an ACL for RCPT (for example), you can examine exactly what was
4135 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4136 commands, but it was not correctly comparing the address with the actual
4137 client host address. Thus, it would show the EHLO address in Received:
4138 header lines when this was not necessary.
4140 PH/27 Added the % operator to ${eval:}.
4142 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4143 it should be ignoring failures (because with -C, for example, it has lost
4144 privilege). It wasn't ignoring creation failures other than "already
4147 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4150 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4151 because an input line was too long, either on its own, or by virtue of
4152 too many continuations, the temporary file was not being removed, and the
4153 return code was incorrect.
4155 PH/31 Missing "BOOL" in function definition in filtertest.c.
4157 PH/32 Applied Sieve patches from the maintainer.
4159 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4161 PH/33 Added "verify = not_blind".
4163 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4164 Local/Makefile (with some defaults set). These are used in built scripts
4165 such as exicyclog, but they have never been used in the exim_install
4166 script (though there are many overriding facilities there). I have
4167 arranged that the exim_install script now takes note of these two
4170 PH/35 Installed configuration files for Dragonfly.
4172 PH/36 When a locally submitted message by a trusted user did not contain a
4173 From: header, and the sender address was obtained from -f or from an SMTP
4174 MAIL command, and the trusted user did not use -F to supply a sender
4175 name, $originator_name was incorrectly used when constructing a From:
4176 header. Furthermore, $originator_name was used for submission mode
4177 messages from external hosts without From: headers in a similar way,
4178 which is clearly wrong.
4180 PH/37 Added control=suppress_local_fixups.
4182 PH/38 When log_selector = +received_sender was set, and the addition of the
4183 sender made the log line's construction buffer exactly full, or one byte
4184 less than full, an overflow happened when the terminating "\n" was
4187 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4188 when the result of a list match is failure because a DNS lookup failed.
4190 PH/40 RM_COMMAND is now used in the building process.
4192 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4193 the "build-* directories that it finds.
4195 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4196 address in a domain literal was a prefix of an interface address.
4198 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4199 when verifying a sender address, unless rewrite_headers is false.
4201 PH/44 Wrote a long comment about why errors_to addresses are verified as
4202 recipients, not senders.
4204 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4205 the ratelimit ACL was added.
4207 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4209 PH/46 Added extra information about PostgreSQL errors to the error string.
4211 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4212 avoiding the need to install special zones in a real server. This is
4213 backwards compatible; if it can't find the fake resolver, it drops back.
4214 Thus, both old and new test suites can be run.
4216 TF/02 Added util/ratelimit.pl
4218 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4219 clock is set back in time.
4221 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4222 Candler <B.Candler@pobox.com>.
4224 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4225 OK for addresses that are the result of redirections.
4227 PH/48 A number of further additions for the benefit of the new test suite,
4228 including a fake gethostbyname() that interfaces to the fake DNS resolver
4231 TF/06 The fix for widen_domains has also been applied to qualify_single and
4232 search_parents which are the other dnslookup options that can cause
4235 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4238 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4240 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4241 service" if it encountered an MX record with an empty target hostname.
4242 The message is now "an MX or SRV record indicated no SMTP service".
4244 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4245 if the DNS of the sending site is misconfigured. This is quite a
4246 common situation. This change restores the behaviour of treating a
4247 helo verification defer as a failure.
4249 PH/51 If self=fail was set on a router, the bounce message did not include the
4250 actual error message.
4256 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4258 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4259 command itself ended in error, the underlying message about the transport
4260 filter timeout was being overwritten with the pipe command error. Now the
4261 underlying error message should be appended to the second error message.
4263 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4265 PH/02 Reduce the amount of output that "make" produces by default. Full output
4266 can still be requested.
4268 PH/03 The warning log line about a condition test deferring for a "warn" verb
4269 was being output only once per connection, rather than after each
4270 occurrence (because it was using the same function as for successful
4271 "warn" verbs). This seems wrong, so I have changed it.
4273 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4274 it should not have, which might have caused a crash in the right
4275 circumstances, but probably never did.
4277 PH/04 Installed a modified version of Tony Finch's patch to make submission
4278 mode fix the return path as well as the Sender: header line, and to
4279 add a /name= option so that you can make the user's friendly name appear
4282 TF/03 Added the control = fakedefer ACL modifier.
4284 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4285 Mark Lowes for thorough testing.
4287 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4289 TK/03 Merged latest SRS patch from Miles Wilton.
4291 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4292 with the definition in sysexits.h (which is #included earlier).
4293 Fortunately, Exim does not actually use EX_OK. The code used to try to
4294 preserve the sysexits.h value, by assuming that macro definitions were
4295 scanned for macro replacements. I have been disabused of this notion,
4296 so now the code just undefines EX_OK before #including unistd.h.
4298 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4299 in the smtp transport. When a block could not be written in a single
4300 write() function, the timeout was being re-applied to each part-write.
4301 This seems wrong - if the receiver was accepting one byte at a time it
4302 would take for ever. The timeout is now adjusted when this happens. It
4303 doesn't have to be particularly precise.
4305 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4306 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4308 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4309 without a domain if the check to <postmaster@domain> fails.
4311 SC/01 Eximstats: added -xls and the ability to specify output files
4312 (patch written by Frank Heydlauf).
4314 SC/02 Eximstats: use FileHandles for outputting results.
4316 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4318 SC/04 Eximstats: fixed display of large numbers with -nvr option
4320 SC/05 Eximstats: fixed merging of reports with empty tables.
4322 SC/06 Eximstats: added the -include_original_destination flag
4324 SC/07 Eximstats: removed tabs and trailing whitespace.
4326 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4328 TK/06 MBOX spool code: Add real "From " MBOX separator line
4329 so the .eml file is really in mbox format (even though
4330 most programs do not really care). Patch from Alex Miller.
4332 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4333 The latter is generated from $received_to and is only set if the
4334 message has one envelope recipient. SA can use these headers,
4335 obviously out-of-the-box. Patch from Alex Miller.
4337 PH/08 The ${def test on a variable was returning false if the variable's
4338 value was "0", contrary to what the specification has always said!
4339 The result should be true unless the variable is empty.
4341 PH/09 The syntax error of a character other than { following "${if
4342 def:variable_name" (after optional whitespace) was not being diagnosed.
4343 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4344 accidental colon was present, for example, could give incorrect results.
4346 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4347 result is used (not including appendfile, where other changes are about
4350 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4351 This involved changing a lot of size variables from int to off_t. It
4352 should work with maildirs and everything.
4354 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4355 spamd dying while we are connected to it.
4357 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4360 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4361 function for BDB 4.3.
4363 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4365 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4366 the sources for PCRE have been re-arranged and more files are now
4369 PH/15 The code I had for printing potentially long long variables in PH/11
4370 above was not the best (it lost precision). The length of off_t variables
4371 is now inspected at build time, and an appropriate printing format (%ld
4372 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4373 to be "long long int" or "long int". This is needed for the internal
4374 formatting function string_vformat().
4376 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4377 the configuration file to be ":syslog", then the script "guesses" where
4378 the logs files are, rather than using the compiled in default. In our
4379 case the guess is not the same as the compiled default, so the script
4380 suddenly stopped working when I started to use syslog. The patch checks
4381 to see if log_file_path is "". If so, it attempts to read it from exim
4382 with no configuration file to get the compiled in version, before it
4383 falls back to the previous guessing code."
4385 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4386 implementing BATV in an Exim configuration. See NewStuff for the gory
4389 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4390 Makefile that are specific to HP-UX.
4392 PH/18 If the "use_postmaster" option was set for a recipient callout together
4393 with the "random" option, the postmaster address was used as the MAIL
4394 FROM address for the random test, but not for the subsequent recipient
4395 test. It is now used for both.
4397 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4398 patch removes a few documentation additions to RFC 3028, because the
4399 latest draft now contains them. It adds the new en;ascii-case comparator
4400 and a new error check for 8bit text in MIME parts. Comparator and
4401 require names are now matched exactly. I enabled the subaddress
4402 extension, but it is not well tested yet (read: it works for me)."
4404 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4405 rework some of the code of TK/09 above to avoid the hardwired use of
4406 "%lld" and "long long". Replaced the call to snprintf() with a call to
4409 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4410 records point to non-existent hosts", "retry timeout exceeded", and
4411 "retry time not reached for any host after a long failure period".
4413 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4414 experimental DomainKeys support:
4416 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4417 (2) On an error such as an illegally used "control", the wrong name for
4418 the control was given.
4420 These problems did NOT occur unless DomainKeys support was compiled.
4422 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4424 PH/24 Added ${if match_ip condition.
4426 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4427 databases so that it will be absolutely obvious if a crash occurs in the
4428 DB library. This is a regular occurrence (often caused by mis-matched
4431 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4432 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4433 picked up on a user's system that detects such things. There doesn't seem
4434 to be a gcc warning option for this - only an attribute that has to be
4435 put on the function's prototype. It seems that in Fedora Core 4 they have
4436 set this on a number of new functions. No doubt there will be more in due
4439 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4440 specify a transport. However, if an address that was verified by such a
4441 router was the subject of a callout, Exim crashed because it tried to
4442 read the rcpt_include_affixes from the non-existent transport. Now it
4443 just assumes that the setting of that option is false. This bug was
4444 introduced by 4.51/PH/31.
4446 PH/28 Changed -d+all to exclude +memory, because that information is very
4447 rarely of interest, but it makes the output a lot bigger. People tend to
4448 do -d+all out of habit.
4450 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4451 code in os-type was giving problems when libc.so lives in lib64, like on
4454 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4455 aren't the modern standard, and it seems that some systems' include files
4456 don't always have them. Exim was already checking for some of the newer
4457 ones like T_AAAA, and defining it itself. I've added checks for all the
4458 record types that Exim uses.
4460 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4461 not automatically generating a new one, as it is supposed to. This
4462 prevented TLS from working. If the file did exist, but contained invalid
4463 data, a new version was generated, as expected. It was only the case of a
4464 non-existent file that was broken.
4466 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4467 with a change in libdomainkeys > 0.64.
4469 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4470 from DNS. If the selector record carries the flag, it now has
4471 precedence over the domain-wide flag.
4473 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4475 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4476 the use of a port name that isn't defined in /etc/services) occurred, the
4477 message was deferred as in a normal delivery, and thus remained on the
4478 spool, instead of being failed because of the mua_wrapper setting. This
4479 is now fixed, and I tidied up some of the mua_wrapper messages at the
4482 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4483 the messages in a hash of arrays rather than using individual hashes.
4484 This is a bit cleaner and results in dramatic memory savings, albeit
4485 at a slight CPU cost.
4487 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4488 as requested by Marc Sherman.
4490 SC/10 Eximstats: added histograms for user specified patterns as requested
4493 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4495 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4496 fopen() in the content-scanning modules that did not already have it.
4502 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4503 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4505 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4507 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4509 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4510 to test Sieve filters that use "vacation".
4512 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4513 that changes the way the GnuTLS parameters are stored in the cache file.
4514 The new format can be generated externally. For backward compatibility,
4515 if the data in the cache doesn't make sense, Exim assumes it has read an
4516 old-format file, and it generates new data and writes a new file. This
4517 means that you can't go back to an older release without removing the
4520 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4521 work if there are any delivery delays because "one_time" forces the
4522 parent to be marked "delivered", so its unseen clone is never tried
4523 again. For this reason, Exim now forbids the simultaneous setting of
4526 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4527 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4528 entry if you want to know the details. The fix, however, neglected to
4529 consider the case when local delivery batching is involved. The test for
4530 "previously delivered" was not happening when checking to see if an
4531 address could be batched with a previous (undelivered) one; under
4532 certain circumstances this could lead to multiple deliveries to the same
4535 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4536 in its include files, and this causes problems building Exim.
4538 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4539 header_syntax) but Exim was just ignoring anything given after a slash.
4540 In particular, this caused confusion with an attempt to use "verify =
4541 reverse_host_lookup/defer_ok". An error is now given when options are
4542 supplied for verify items that do not have them. (Maybe reverse_host_
4543 lookup should have a defer_ok option, but that's a different point.)
4545 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4546 defined by RFC 821) to 2048, because there were problems with some AUTH
4547 commands, and RFC 1869 says the size should be increased for extended
4548 SMTP commands that take arguments.
4550 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4553 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4554 "unknown" error; now it says that the functionality isn't in the binary.
4556 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4557 an address' error message when a string expansion fails (syntax or
4558 whatever). Otherwise the password may appear in the log. Following change
4559 PH/42 below, there is no longer a chance of it appearing in a bounce
4562 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4564 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4565 of its addresses was ever tried. (Bugzilla bug #2.)
4567 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4568 the result incorrectly in the debug output. (It correctly added a newline
4569 to what was transported.)
4571 TF/01 Added $received_time.
4573 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4574 commented out examples of how to interface to a virus scanner and to
4575 SpamAssassin. Also added commented examples of av_scanner and
4576 spamd_address settings.
4578 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4579 and controls are allowed in which ACLs. There were a couple of minor
4580 errors. Some of the entries in the conditions table (which is a table of
4581 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4582 negation of where the condition IS allowed.
4584 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4586 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4587 header file does not have a version number, so I've had to invent a new
4588 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4589 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4590 radiusclient), but it was contributed by a Radius user.
4592 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4593 files or directories, for OpenSSL.
4595 PH/19 When an Exim process that is running as root has to create an Exim log
4596 file, it does so in a subprocess that runs as exim:exim so as to get the
4597 ownership right at creation (otherwise, other Exim processes might see
4598 the file with the wrong ownership). There was no test for failure of this
4599 fork() call, which would lead to the process getting stuck as it waited
4600 for a non-existent subprocess. Forks do occasionally fail when resources
4601 run out. I reviewed all the other calls to fork(); they all seem to check
4604 PH/20 When checking for unexpected SMTP input at connect time (before writing
4605 the banner), Exim was not dealing correctly with a non-positive return
4606 from the read() function. If the client had disconnected by this time,
4607 the result was a log entry for a synchronization error with an empty
4608 string after "input=" when read() returned zero. If read() returned -1
4609 (an event I could not check), uninitialized data bytes were printed.
4610 There were reports of junk text (parts of files, etc) appearing after
4613 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4615 PH/22 Added support for macro redefinition, and (re)definition in between
4616 driver and ACL definitions.
4618 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4619 forgetting to use the resulting value; it was using the unexpanded value.
4621 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4622 hadn't been configured. The fix is from Juergen Kreileder, who
4623 understands it better than I do:
4625 "Here's what I see happening with three configured cyrus_sasl
4626 authenticators configured (plain, login, cram-md5):
4628 On startup auth_cyrus_sasl_init() gets called for each of these.
4629 This means three calls to sasl_listmech() without a specified mech_list.
4630 => SASL tests which mechs of all available mechs actually work
4631 => three warnings about OTP not working
4632 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4634 With the patch, sasl_listmech() also gets called three times. But now
4635 SASL's mech_list option is set to the server_mech specified in the the
4636 authenticator. Or in other words, the answer from sasl_listmech()
4637 gets limited to just the mech you're testing for (which is different
4639 => the return list contains just 'plain' or 'login', 'cram-md5' or
4640 nothing depending on the value of ob->server_mech.
4642 I've just tested the patch: Authentication still works fine,
4643 unavailable mechs specified in the exim configuration are still
4644 caught, and the auth.log warnings about OTP are gone."
4646 PH/25 When debugging is enabled, the contents of the command line are added
4647 to the debugging output, even when log_selector=+arguments is not
4650 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4651 answer is "GNU", and only if the return is "GNU/something" is the answer
4654 PH/27 $acl_verify_message is now set immediately after the failure of a
4655 verification in an ACL, and so is available in subsequent modifiers. In
4656 particular, the message can be preserved by coding like this:
4658 warn !verify = sender
4659 set acl_m0 = $acl_verify_message
4661 Previously, $acl_verify_message was set only while expanding "message"
4662 and "log_message" when a very denied access.
4664 PH/28 Modified OS/os.c-Linux with
4666 -#ifndef OS_LOAD_AVERAGE
4667 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4669 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4670 nomenclature these days.)
4672 PH/29 Installed patch from the Sieve maintainer that adds the options
4673 sieve_useraddress and sieve_subaddress to the redirect router.
4675 PH/30 In these circumstances:
4676 . Two addresses routed to the same list of hosts;
4677 . First host does not offer TLS;
4678 . First host accepts first address;
4679 . First host gives temporary error to second address;
4680 . Second host offers TLS and a TLS session is established;
4681 . Second host accepts second address.
4682 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4683 and peerdn, if requested) that were in fact used only for the second
4686 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4687 attention to any local part prefix or suffix that was matched by the
4688 router that accepted the address. It now behaves in the same way as it
4689 does for delivery: the affixes are removed from the local part unless
4690 rcpt_include_affixes is set on the transport.
4692 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4693 timeout during the DATA phase of an incoming message.
4695 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4696 applied a patch sanctioned by the Sieve maintainer.
4698 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4699 the uid or gid is negative. A case of a negative gid caused this to be
4700 noticed. The fix allows for either to be negative.
4702 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4703 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4706 PH/36 The change PH/12 above was broken. Fixed it.
4708 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4709 the grounds that routing the same address twice would always produce the
4710 same answer. This might have been true once, but it is certainly no
4711 longer true now. Routing a child address may depend on the previous
4712 routing that produced that child. Some complicated redirection strategies
4713 went wrong when messages had multiple recipients, and made Exim's
4714 behaviour dependent on the order in which the addresses were given.
4716 I have moved the duplicate checking until after the routing is complete.
4717 Exim scans the addresses that are assigned to local and remote
4718 transports, and removes any duplicates. This means that more work will be
4719 done, as duplicates will always all be routed, but duplicates are
4720 presumably rare, so I don't expect this is of any significance.
4722 For deliveries to pipes, files, and autoreplies, the duplicate checking
4723 still happens during the routing process, since they are not going to be
4726 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4727 It corrects a timeout issue with spamd. This is Ian's comment: "The
4728 background is that sometimes spamd either never reads data from a
4729 connection it has accepted, or it never writes response data. The exiscan
4730 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4731 blindly assumes that writes won't block so it may never time out."
4733 PH/39 Allow G after quota size as well as K and M.
4735 PH/40 The value set for $authenticated_id in an authenticator may not contain
4736 binary zeroes or newlines because the value is written to log lines and
4737 to spool files. There was no check on this. Now the value is run through
4738 the string_printing() function so that such characters are converted to
4739 printable escape sequences.
4741 PH/41 $message_linecount is a new variable that contains the total number of
4742 lines in the message. Compare $body_linecount, which is the count for the
4745 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4746 bounce and delay warning messages, except in certain special cases, which
4749 (a) An SMTP error message from a remote host;
4750 (b) A message specified in a :fail: redirection;
4751 (c) A message specified in a "fail" command in a system filter;
4752 (d) A message specified in a FAIL return from the queryprogram router;
4753 (e) A message specified by the cannot_route_message router option.
4755 In these cases only, Exim does include the error details in bounce and
4756 warning messages. There are also a few cases where bland messages such
4757 as "unrouteable address" or "local delivery error" are given.
4759 PH/43 $value is now also set for the "else" part of a ${run expansion.
4761 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4762 being worked on, but at least Exim now implements the latest version to
4765 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4766 process to complete was treated as a delivery failure, a timeout while
4767 writing the message to the pipe was logged, but erroneously treated as a
4768 successful delivery. Such timeouts include transport filter timeouts. For
4769 consistency with the overall process timeout, these timeouts are now
4770 treated as errors, giving rise to delivery failures by default. However,
4771 there is now a new Boolean option for the pipe transport called
4772 timeout_defer, which, if set TRUE, converts the failures into defers for
4773 both kinds of timeout. A transport filter timeout is now identified in
4776 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4777 systems where "make" and "gmake" are different, calling "gmake" at top
4778 level broke things. I've arranged for the value of $(MAKE) to be passed
4779 from the Makefile to this script so that it can call the same version of
4783 A note about Exim versions 4.44 and 4.50
4784 ----------------------------------------
4786 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4787 changes of various kinds. As a consequence, a big documentation update was
4788 needed. This delayed the release for rather longer than seemed good, especially
4789 in the light of a couple of (minor) security issues. Therefore, the changes
4790 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4791 release. So 4.44 and 4.50 are in effect two different branches that both start
4794 I have left the 4.50 change log unchanged; it contains all the changes since
4795 4.43. The change log for 4.44 is below; many of its items are identical to
4796 those for 4.50. This seems to be the most sensible way to preserve the
4797 historical information.
4803 1. Minor wording change to the doc/README.SIEVE file.
4805 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4806 computation of the current number of files was incorrect.
4808 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4809 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4812 4. Give more explanation in the error message when the command for a transport
4813 filter fails to execute.
4815 5. There are several places where Exim runs a non-Exim command in a
4816 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4817 was being done only for the command run by the queryprogram router. It is
4818 now done for all such subprocesses. The other cases are: ${run, transport
4819 filters, and the commands run by the lmtp and pipe transports.
4821 6. Added CONFIGURE_GROUP build-time option.
4823 7. Some older OS have a limit of 256 on the maximum number of file
4824 descriptors. Exim was using setrlimit() to set 1000 as a large value
4825 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4826 systems. I've change it so that if it can't get 1000, it tries for 256.
4828 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4829 was an oversight, and furthermore, ever since the addition of extra
4830 controls (e.g. 4.43/32), the checks on when to allow different forms of
4831 "control" were broken. There should now be diagnostics for all cases when a
4832 control that does not make sense is encountered.
4834 9. Added the /retain_sender option to "control=submission".
4836 10. $recipients is now available in the predata ACL (oversight).
4838 11. Tidy the search cache before the fork to do a delivery from a message
4839 received from the command line. Otherwise the child will trigger a lookup
4840 failure and thereby defer the delivery if it tries to use (for example) a
4841 cached ldap connection that the parent has called unbind on.
4843 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4844 of $address_data from the recipient verification was clobbered by the
4845 sender verification.
4847 13. The value of address_data from a sender verification is now available in
4848 $sender_address_data in subsequent conditions in the ACL statement.
4850 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4852 15. Added a new option "connect=<time>" to callout options, to set a different
4855 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4856 was its contents. (It was OK if the option was not defined at all.)
4858 17. A "Completed" log line is now written for messages that are removed from
4859 the spool by the -Mrm option.
4861 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4862 information about exactly what failed.
4864 19. Added -dd to debug only the daemon process.
4866 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4867 handles timeouts, both on the server side and network timeouts. Renamed the
4868 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4870 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4871 It is now set to "smtps".
4873 22. $host_address is now set to the target address during the checking of
4874 ignore_target_hosts.
4876 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4877 being passed; this would have caused $sender_host_name to have been used if
4878 matching the list had actually called for a host name (not very likely,
4879 since this list is usually IP addresses). A host name is now passed as
4882 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4883 code that specifies a non-restarting handler (typically sigaction() in
4884 modern systems) in an attempt to fix a rare and obscure crash bug.
4886 25. Narrowed the window for a race in the daemon that could cause it to ignore
4887 SIGCHLD signals. This is not a major problem, because they are used only to
4888 wake it up if nothing else does.
4890 26. A malformed maildirsize file could cause Exim to calculate negative values
4891 for the mailbox size or file count. Odd effects could occur as a result.
4892 The maildirsize information is now recalculated if the size or filecount
4895 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4896 support for a long time. Removed HAVE_SYS_VFS_H.
4898 28. Installed the latest version of exipick from John Jetmore.
4900 29. In an address list, if the pattern was not a regular expression, an empty
4901 subject address (from a bounce message) matched only if the pattern was an
4902 empty string. Non-empty patterns were not even tested. This was the wrong
4903 because it is perfectly reasonable to use an empty address as part of a
4904 database query. An empty address is now tested by patterns that are
4905 lookups. However, all the other forms of pattern expect the subject to
4906 contain a local part and a domain, and therefore, for them, an empty
4907 address still always fails if the pattern is not itself empty.
4909 30. Exim went into a mad DNS loop when attempting to do a callout where the
4910 host was specified on an smtp transport, and looking it up yielded more
4911 than one IP address.
4913 31. Re-factored the code for checking spool and log partition space into a
4914 function that finds that data and another that does the check. The former
4915 is then used to implement four new variables: $spool_space, $log_space,
4916 $spool_inodes, and $log_inodes.
4918 32. The RFC2047 encoding function was originally intended for short strings
4919 such as real names; it was not keeping to the 75-character limit for
4920 encoded words that the RFC imposes. It now respects the limit, and
4921 generates multiple encoded words if necessary. To be on the safe side, I
4922 have increased the buffer size for the ${rfc2047: expansion operator from
4925 33. It is now permitted to omit both strings after an "if" condition; if the
4926 condition is true, the result is "true". As before, when the second string
4927 is omitted, a false condition yields an empty string. This makes it less
4928 cumbersome to write custom ACL and router conditions.
4930 34. Failure to deliver a bounce message always caused it to be frozen, even if
4931 there was an errors_to setting on the router. The errors_to setting is now
4934 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4935 canonical form (fully expanded) before being placed in
4936 $sender_host_address.
4938 36. The table in the code that translates DNS record types into text (T_A to
4939 "A" for instance) was missing entries for NS and CNAME. It is just possible
4940 that this could have caused confusion if both these types were looked up
4941 for the same domain, because the text type is used as part of Exim's
4942 per-process caching. But the chance of anyone hitting this buglet seems
4945 37. The dnsdb lookup has been extended in a number of ways.
4947 (1) There is a new type, "zns", which walks up the domain tree until it
4948 finds some nameserver records. It should be used with care.
4950 (2) There is a new type, "mxh", which is like "mx" except that it returns
4951 just the host names, not the priorities.
4953 (3) It is now possible to give a list of domains (or IP addresses) to be
4954 looked up. The behaviour when one of the lookups defers can be
4955 controlled by a keyword.
4957 (4) It is now possible to specify the separator character for use when
4958 multiple records are returned.
4960 38. The dnslists ACL condition has been extended: it is now possible to supply
4961 a list of IP addresses and/or domains to be looked up in a particular DNS
4964 39. Added log_selector=+queue_time_overall.
4966 40. When running the queue in the test harness, wait just a tad after forking a
4967 delivery process, to get repeatability of debugging output.
4969 41. Include certificate and key file names in error message when GnuTLS fails
4970 to set them up, because the GnuTLS error message doesn't include the name
4971 of the failing file when there is a problem reading it.
4973 42. Allow both -bf and -bF in the same test run.
4975 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4977 44. The "Exiscan patch" is now merged into the mainline Exim source.
4979 45. Sometimes the final signoff response after QUIT could fail to get
4980 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4981 < 0 before doing a fflush(). This bug looks as though it goes back to the
4982 introduction of TLS in release 3.20, but "sometimes" must have been rare
4983 because the tests only now provoked it.
4985 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4986 (this can affect the format of dates).
4988 47. exim_tidydb, when checking for the continued existence of a message for
4989 which it has found a message-specific retry record, was not finding
4990 messages that were in split spool directories. Consequently, it was
4991 deleting retry records that should have stayed in existence.
4993 48. Steve fixed some bugs in eximstats.
4995 49. The SPA authentication driver was not abandoning authentication and moving
4996 on to the next authenticator when an expansion was forced to fail,
4997 contradicting the general specification for all authenticators. Instead it
4998 was generating a temporary error. It now behaves as specified.
5000 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5001 (the order specifies the preference for clients). The order is now AES256,
5002 AES128, 3DES, ARCFOUR128.
5004 51. Small patch to Sieve code - explicitly set From: when generating an
5007 52. Exim crashed if a remote delivery caused a very long error message to be
5008 recorded - for instance if somebody sent an entire SpamAssassin report back
5009 as a large number of 550 error lines. This bug was coincidentally fixed by
5010 increasing the size of one of Exim's internal buffers (big_buffer) that
5011 happened as part of the Exiscan merge. However, to be on the safe side, I
5012 have made the code more robust (and fixed the comments that describe what
5015 53. Now that there can be additional text after "Completed" in log lines (if
5016 the queue_time_overall log selector is set), a one-byte patch to exigrep
5017 was needed to allow it to recognize "Completed" as not the last thing in
5020 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5021 patch that reportedly fixes this has been added. I am not expert enough to
5022 create a test for it. This is what the patch creator wrote:
5024 "I found a little strange behaviour of ldap code when working with
5025 Windows 2003 AD Domain, where users was placed in more than one
5026 Organization Units. When I tried to give exim partial DN, the exit code
5027 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5028 But simultaneously result of request was absolutely normal ldap result,
5029 so I produce this patch..."
5031 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5032 REFERENCE, so I have modified the code to exclude the patch when that macro
5035 55. Some experimental protocols are using DNS PTR records for new purposes. The
5036 keys for these records are domain names, not reversed IP addresses. The
5037 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5038 leaves it alone. Component reversal etc. now happens only for IP addresses.
5041 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5043 57. Double the size of the debug message buffer (to 2048) so that more of very
5044 long debug lines gets shown.
5046 58. The exicyclog utility now does better if the number of log files to keep
5047 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5049 59. Two changes related to the smtp_active_hostname option:
5051 (1) $smtp_active_hostname is now available as a variable.
5052 (2) The default for smtp_banner uses $smtp_active_hostname instead
5053 of $primary_hostname.
5055 60. The host_aton() function is supposed to be passed a string that is known
5056 to be a valid IP address. However, in the case of IPv6 addresses, it was
5057 not checking this. This is a hostage to fortune. Exim now panics and dies
5058 if the condition is not met. A case was found where this could be provoked
5059 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5060 components; fortuitously, this particular loophole had already been fixed
5061 by change 4.50/55 above.
5063 If there are any other similar loopholes, the new check in host_aton()
5064 itself should stop them being exploited. The report I received stated that
5065 data on the command line could provoke the exploit when Exim was running as
5066 exim, but did not say which command line option was involved. All I could
5067 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5068 running as the user.
5071 61. There was a buffer overflow vulnerability in the SPA authentication code
5072 (which came originally from the Samba project). I have added a test to the
5073 spa_base64_to_bits() function which I hope fixes it.
5076 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5077 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5079 63. The daemon start-up calls getloadavg() while still root for those OS that
5080 need the first call to be done as root, but it missed one case: when
5081 deliver_queue_load_max is set with deliver_drop_privilege. This is
5082 necessary for the benefit of the queue runner, because there is no re-exec
5083 when deliver_drop_privilege is set.
5085 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5086 This has been fixed.
5088 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5089 was in use, was not putting the data itself into the right store pool;
5090 consequently, it could be overwritten for a subsequent message in the same
5091 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5094 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5096 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5097 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5098 the function were treating the return as a boolean value, which happened to
5099 work because 0=false and not-0=true, but is not correct code.
5101 68. The host_aton() function was not handling scoped IPv6 addresses (those
5102 with, for example, "%eth0" on the end) correctly.
5104 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5105 negated items (that is, ~something) in unsigned ints. Some compilers
5106 apparently mutter when there is no cast.
5108 70. If an address verification called from an ACL failed, and did not produce a
5109 user-specific message (i.e. there was only a "system" message), nothing was
5110 put in $acl_verify_message. In this situation, it now puts the system
5113 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5114 session; change 4.31/43 added the unwanted input to the log line - except
5115 that it did not do this in the start of session case. It now does.
5117 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5118 This is wrong and can cause the other end to generate a synchronization
5119 error if it is another Exim or anything else that does the synchronization
5120 check. A QUIT command is no longer sent after a timeout.
5122 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5123 during host lookups.
5125 74. The defer_ok option of callout verification was not working if it was used
5126 when verifying addresses in header lines, that is, for this case:
5128 verify = header_sender/callout=defer_ok
5130 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5131 those file descriptors could be used for SMTP connections. If anything
5132 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5133 could be sent to the SMTP client, causing chaos. The daemon now opens
5134 stdin, stdout, and stderr to /dev/null when it puts itself into the
5137 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5138 log by default. The user can override this with suitable Perl magic.
5140 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5141 the log message when discard triggers, was not working for the DATA ACL or
5142 for the non-SMTP ACL.
5144 78. Error message wording change in sieve.c.
5146 79. If smtp_accept_max_per_host was set, the number of connections could be
5147 restricted to fewer than expected, because the daemon was trying to set up
5148 a new connection before checking whether the processes handling previous
5149 connections had finished. The check for completed processes is now done
5150 earlier. On busy systems, this bug wouldn't be noticed because something
5151 else would have woken the daemon, and it would have reaped the completed
5154 80. If a message was submitted locally by a user whose login name contained one
5155 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5156 It caused a spool format error. I have fixed the spool reading code. A
5157 related problem was that the "from" clause in the Received: line became
5158 illegal because of the space(s). It is now covered by ${quote_local_part.
5160 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5163 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5165 83. Patch from Sieve maintainer to fix unterminated string problem in
5166 "vacation" handling.
5168 84. Some minor changes to the Linux configuration files to help with other
5169 OS variants using glibc.
5171 85. One more patch for Sieve to update vacation handling to latest spec.
5174 ----------------------------------------------------
5175 See the note above about the 4.44 and 4.50 releases.
5176 ----------------------------------------------------
5182 1. Change 4.43/35 introduced a bug that caused file counts to be
5183 incorrectly computed when quota_filecount was set in an appendfile
5186 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5187 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5190 3. Give more explanation in the error message when the command for a transport
5191 filter fails to execute.
5193 4. There are several places where Exim runs a non-Exim command in a
5194 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5195 was being done only for the command run by the queryprogram router. It is
5196 now done for all such subprocesses. The other cases are: ${run, transport
5197 filters, and the commands run by the lmtp and pipe transports.
5199 5. Some older OS have a limit of 256 on the maximum number of file
5200 descriptors. Exim was using setrlimit() to set 1000 as a large value
5201 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5202 systems. I've change it so that if it can't get 1000, it tries for 256.
5204 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5205 was an oversight, and furthermore, ever since the addition of extra
5206 controls (e.g. 4.43/32), the checks on when to allow different forms of
5207 "control" were broken. There should now be diagnostics for all cases when a
5208 control that does not make sense is encountered.
5210 7. $recipients is now available in the predata ACL (oversight).
5212 8. Tidy the search cache before the fork to do a delivery from a message
5213 received from the command line. Otherwise the child will trigger a lookup
5214 failure and thereby defer the delivery if it tries to use (for example) a
5215 cached ldap connection that the parent has called unbind on.
5217 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5218 of $address_data from the recipient verification was clobbered by the
5219 sender verification.
5221 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5222 was its contents. (It was OK if the option was not defined at all.)
5224 11. A "Completed" log line is now written for messages that are removed from
5225 the spool by the -Mrm option.
5227 12. $host_address is now set to the target address during the checking of
5228 ignore_target_hosts.
5230 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5231 being passed; this would have caused $sender_host_name to have been used if
5232 matching the list had actually called for a host name (not very likely,
5233 since this list is usually IP addresses). A host name is now passed as
5236 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5237 code that specifies a non-restarting handler (typically sigaction() in
5238 modern systems) in an attempt to fix a rare and obscure crash bug.
5240 15. Narrowed the window for a race in the daemon that could cause it to ignore
5241 SIGCHLD signals. This is not a major problem, because they are used only to
5242 wake it up if nothing else does.
5244 16. A malformed maildirsize file could cause Exim to calculate negative values
5245 for the mailbox size or file count. Odd effects could occur as a result.
5246 The maildirsize information is now recalculated if the size or filecount
5249 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5250 support for a long time. Removed HAVE_SYS_VFS_H.
5252 18. Updated exipick to current release from John Jetmore.
5254 19. Allow an empty sender to be matched against a lookup in an address list.
5255 Previously the only cases considered were a regular expression, or an
5258 20. Exim went into a mad DNS lookup loop when doing a callout where the
5259 host was specified on the transport, if the DNS lookup yielded more than
5262 21. The RFC2047 encoding function was originally intended for short strings
5263 such as real names; it was not keeping to the 75-character limit for
5264 encoded words that the RFC imposes. It now respects the limit, and
5265 generates multiple encoded words if necessary. To be on the safe side, I
5266 have increased the buffer size for the ${rfc2047: expansion operator from
5269 22. Failure to deliver a bounce message always caused it to be frozen, even if
5270 there was an errors_to setting on the router. The errors_to setting is now
5273 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5274 canonical form (fully expanded) before being placed in
5275 $sender_host_address.
5277 24. Updated eximstats to version 1.33
5279 25. Include certificate and key file names in error message when GnuTLS fails
5280 to set them up, because the GnuTLS error message doesn't include the name
5281 of the failing file when there is a problem reading it.
5283 26. Expand error message when OpenSSL has problems setting up cert/key files.
5286 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5287 (this can affect the format of dates).
5289 28. exim_tidydb, when checking for the continued existence of a message for
5290 which it has found a message-specific retry record, was not finding
5291 messages that were in split spool directories. Consequently, it was
5292 deleting retry records that should have stayed in existence.
5294 29. eximstats updated to version 1.35
5295 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5296 1.35 - bugfix such that pie charts by volume are generated correctly
5298 30. The SPA authentication driver was not abandoning authentication and moving
5299 on to the next authenticator when an expansion was forced to fail,
5300 contradicting the general specification for all authenticators. Instead it
5301 was generating a temporary error. It now behaves as specified.
5303 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5304 (the order specifies the preference for clients). The order is now AES256,
5305 AES128, 3DES, ARCFOUR128.
5307 31. Small patch to Sieve code - explicitly set From: when generating an
5310 32. Exim crashed if a remote delivery caused a very long error message to be
5311 recorded - for instance if somebody sent an entire SpamAssassin report back
5312 as a large number of 550 error lines. This bug was coincidentally fixed by
5313 increasing the size of one of Exim's internal buffers (big_buffer) that
5314 happened as part of the Exiscan merge. However, to be on the safe side, I
5315 have made the code more robust (and fixed the comments that describe what
5318 33. Some experimental protocols are using DNS PTR records for new purposes. The
5319 keys for these records are domain names, not reversed IP addresses. The
5320 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5321 leaves it alone. Component reversal etc. now happens only for IP addresses.
5324 34. The host_aton() function is supposed to be passed a string that is known
5325 to be a valid IP address. However, in the case of IPv6 addresses, it was
5326 not checking this. This is a hostage to fortune. Exim now panics and dies
5327 if the condition is not met. A case was found where this could be provoked
5328 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5329 components; fortuitously, this particular loophole had already been fixed
5330 by change 4.50/55 or 4.44/33 above.
5332 If there are any other similar loopholes, the new check in host_aton()
5333 itself should stop them being exploited. The report I received stated that
5334 data on the command line could provoke the exploit when Exim was running as
5335 exim, but did not say which command line option was involved. All I could
5336 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5337 running as the user.
5340 35. There was a buffer overflow vulnerability in the SPA authentication code
5341 (which came originally from the Samba project). I have added a test to the
5342 spa_base64_to_bits() function which I hope fixes it.
5345 36. The daemon start-up calls getloadavg() while still root for those OS that
5346 need the first call to be done as root, but it missed one case: when
5347 deliver_queue_load_max is set with deliver_drop_privilege. This is
5348 necessary for the benefit of the queue runner, because there is no re-exec
5349 when deliver_drop_privilege is set.
5351 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5352 was in use, was not putting the data itself into the right store pool;
5353 consequently, it could be overwritten for a subsequent message in the same
5354 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5357 38. Sometimes the final signoff response after QUIT could fail to get
5358 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5359 < 0 before doing a fflush(). This bug looks as though it goes back to the
5360 introduction of TLS in release 3.20, but "sometimes" must have been rare
5361 because the tests only now provoked it.
5367 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5368 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5369 Now it returns an integer. A number of calls were still expecting a T/F
5370 return. Fortuitously, in all cases, the tests worked in OK situations,
5371 which is the norm. However, things would have gone wrong on any write
5372 failures on the smtp file descriptor. This function is used when sending
5373 messages over SMTP and also when doing verify callouts.
5375 2. When Exim is called to do synchronous delivery of a locally submitted
5376 message (the -odf or -odi options), it no longer closes stderr before doing
5379 3. Implemented the mua_wrapper option.
5381 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5383 5. Implemented the functions header_remove(), header_testname(),
5384 header_add_at_position(), and receive_remove_recipient(), and exported them
5387 6. If an ACL "warn" statement specified the addition of headers, Exim already
5388 inserted X-ACL-Warn: at the start if there was no header name. However, it
5389 was not making this test for the second and subsequent header lines if
5390 there were newlines in the string. This meant that an invalid header could
5391 be inserted if Exim was badly configured.
5393 7. Allow an ACL "warn" statement to add header lines at the start or after all
5394 the Received: headers, as well as at the end.
5396 8. Added the rcpt_4xx retry error code.
5398 9. Added postmaster_mailfrom=xxx to callout verification option.
5400 10. Added mailfrom=xxxx to the callout verification option, for verify=
5403 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5404 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5406 12. Inserted some casts to stop certain compilers warning when using pointer
5407 differences as field lengths or precisions in printf-type calls (mostly
5408 affecting debugging statements).
5410 13. Added optional readline() support for -be (dynamically loaded).
5412 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5413 same clock tick as a message's arrival, so that its received time was the
5414 same as the "first fail" time on the retry record, and that message
5415 remained on the queue past the ultimate address timeout, every queue runner
5416 would try a delivery (because it was past the ultimate address timeout) but
5417 after another failure, the ultimate address timeout, which should have then
5418 bounced the address, did not kick in. This was a "< instead of <=" error;
5419 in most cases the first failure would have been in the next clock tick
5420 after the received time, and all would be well.
5422 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5423 being recognized when the domain list was tested by the match_domain
5424 condition in an expansion string.
5426 16. Added the ${str2b64: operator.
5428 17. Exim was always calling setrlimit() to set a large limit for the number of
5429 processes, without checking whether the existing limit was already
5430 adequate. (It did check for the limit on file descriptors.) Furthermore,
5431 errors from getrlimit() and setrlimit() were being ignored. Now they are
5432 logged to the main and panic logs, but Exim does carry on, to try to do its
5433 job under whatever limits there are.
5435 18. Imported PCRE 5.0.
5437 19. Trivial typo in log message " temporarily refused connection" (the leading
5440 20. If the log selector return_path_on_delivery was set and an address was
5441 redirected to /dev/null, the delivery process crashed because it assumed
5442 that a return path would always be set for a "successful" delivery. In this
5443 case, the whole delivery is bypassed as an optimization, and therefore no
5446 21. Internal re-arrangement: the function for sending a challenge and reading
5447 a response while authentication was assuming a zero-terminated challenge
5448 string. It's now changed to take a pointer and a length, to allow for
5449 binary data in such strings.
5451 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5453 23. Exim was not respecting finduser_retries when seeking the login of the
5454 uid under which it was called; it was always trying 10 times. (The default
5455 setting of finduser_retries is zero.) Also, it was sleeping after the final
5456 failure, which is pointless.
5458 24. Implemented tls_on_connect_ports.
5460 25. Implemented acl_smtp_predata.
5462 26. If the domain in control=submission is set empty, Exim assumes that the
5463 authenticated id is a complete email address when it generates From: or
5464 Sender: header lines.
5466 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5467 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5468 chown and chgrp in /bin and hostname in /usr/bin.
5470 28. Exim was keeping the "process log" file open after each use, just as it
5471 does for the main log. This opens the possibility of it remaining open for
5472 long periods when the USR1 signal hits a daemon. Occasional processlog
5473 errors were reported, that could have been caused by this. Anyway, it seems
5474 much more sensible not to leave this file open at all, so that is what now
5477 29. The long-running daemon process does not normally write to the log once it
5478 has entered its main loop, and it closes the log before doing so. This is
5479 so that log files can straightforwardly be renamed and moved. However,
5480 there are a couple of unusual error situations where the daemon does write
5481 log entries, and I had neglected to close the log afterwards.
5483 30. The text of an SMTP error response that was received during a remote
5484 delivery was being truncated at 512 bytes. This is too short for some of
5485 the long messages that one sometimes sees. I've increased the limit to
5488 31. It is now possible to make retry rules that apply only when a message has a
5489 specific sender, in particular, an empty sender.
5491 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5492 it possible to be selective about when SMTP synchronization is enforced.
5494 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5496 32. Implemented hosts_connection_nolog.
5498 33. Added an ACL for QUIT.
5500 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5503 35. Added mailbox_size and mailbox_filecount to appendfile.
5505 36. Added control = no_multiline_responses to ACLs.
5507 37. There was a bug in the logic of the code that waits for the clock to tick
5508 in the case where the clock went backwards by a substantial amount such
5509 that the microsecond fraction of "now" was more than the microsecond
5510 fraction of "then" (but the whole seconds number was less).
5512 38. Added support for the libradius Radius client library this is found on
5513 FreeBSD (previously only the radiusclient library was supported).
5519 1. When certain lookups returned multiple values in the form name=value, the
5520 quoting of the values was not always being done properly. Specifically:
5521 (a) If the value started with a double quote, but contained no whitespace,
5523 (b) If the value contained whitespace other than a space character (i.e.
5524 tabs or newlines or carriage returns) it was not quoted.
5525 This fix has been applied to the mysql and pgsql lookups by writing a
5526 separate quoting function and calling it from the lookup code. The fix
5527 should probably also be applied to nisplus, ibase and oracle lookups, but
5528 since I cannot test any of those, I have not disturbed their existing code.
5530 2. A hit in the callout cache for a specific address caused a log line with no
5531 reason for rejecting RCPT. Now it says "Previous (cached) callout
5532 verification failure".
5534 3. There was an off-by-one bug in the queryprogram router. An over-long
5535 return line was truncated at 256 instead of 255 characters, thereby
5536 overflowing its buffer with the terminating zero. As well as fixing this, I
5537 have increased the buffer size to 1024 (and made a note to document this).
5539 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5540 when Exim is waiting for an SMTP response from a remote server, Exim
5541 restarts its select() call on the socket, thereby resetting its timeout.
5542 This is not a problem when such interrupts are rare. Somebody set up a cron
5543 job to run exiwhat every 2 minutes, which is less than the normal select()
5544 timeout (5 or 10 minutes). This meant that the select() timeout never
5545 kicked in because it was always reset. I have fixed this by comparing the
5546 time when an interrupt arrives with the time at the start of the first call
5547 to select(). If more time than the timeout has elapsed, the interrupt is
5548 treated as a timeout.
5550 5. Some internal re-factoring in preparation for the addition of Sieve
5551 extensions (by MH). In particular, the "personal" test is moved to a
5552 separate function, and given an option for scanning Cc: and Bcc: (which is
5553 not set for Exim filters).
5555 6. When Exim created an email address using the login of the caller as the
5556 local part (e.g. when creating a From: or Sender: header line), it was not
5557 quoting the local part when it contained special characters such as @.
5559 7. Installed new OpenBSD configuration files.
5561 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5562 try to make them clearer.
5564 9. Callout options, other than the timeout value, were being ignored when
5565 verifying sender addresses in header lines. For example, when using
5567 verify = header_sender/callout=no_cache
5569 the cache was (incorrectly) being used.
5571 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5572 only the Cygwin environment.
5574 11. When return_path_on_delivery was set as a log selector, if different remote
5575 addresses in the same message used different return paths and parallel
5576 remote delivery occurred, the wrong values would sometimes be logged.
5577 (Whenever a remote delivery process finished, the return path value from
5578 the most recently started remote delivery process was logged.)
5580 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5581 lines when AUTH and/or TLS are in use. This is the "received protocol"
5582 field. Exim used to use "asmtp" for authenticated SMTP, without any
5583 indication (in the protocol name) for TLS use. Now it follows the RFC and
5584 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5585 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5586 names appear in log lines as well as in Received: header lines.
5588 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5589 extensions, and comparison tests, and to fix some bugs.
5591 14. Changes to the "personal" filter test:
5593 (1) The test was buggy in that it was just doing the equivalent of
5594 "contains" tests on header lines. For example, if a user's address was
5595 anne@some.where, the "personal" test would incorrectly be true for
5597 To: susanne@some.where
5599 This test is now done by extracting each address from the header in turn,
5600 and checking the entire address. Other tests that are part of "personal"
5601 are now done using regular expressions (for example, to check local parts
5602 of addresses in From: header lines).
5604 (2) The list of non-personal local parts in From: addresses has been
5605 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5606 taken from the Sieve specification recommendations.
5608 (3) If the message contains any header line starting with "List-" it is
5609 treated as non-personal.
5611 (4) The test for "circular" in the Subject: header line has been removed
5612 because it now seems ill-conceived.
5614 15. Minor typos in src/EDITME comments corrected.
5616 16. Installed latest exipick from John Jetmore.
5618 17. If headers_add on a router specified a text string that was too long for
5619 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5620 of string_sprintf() is now avoided.
5622 18. $message_body_size was not set (it was always zero) when running the DATA
5623 ACL and the local_scan() function.
5625 19. For the "mail" command in an Exim filter, no default was being set for
5626 the once_repeat time, causing a random time value to be used if "once" was
5627 specified. (If the value happened to be <= 0, no repeat happened.) The
5628 default is now 0s, meaning "never repeat". The "vacation" command was OK
5629 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5630 (I found it when inspecting the code).
5632 20. There is now an overall timeout for performing a callout verification. It
5633 defaults to 4 times the callout timeout, which applies to individual SMTP
5634 commands during the callout. The overall timeout applies when there is more
5635 than one host that can be tried. The timeout is checked before trying the
5636 next host. This prevents very long delays if there are a large number of
5637 hosts and all are timing out (e.g. when the network connections are timing
5638 out). The value of the overall timeout can be changed by specifying an
5639 additional sub-option for "callout", called "maxwait". For example:
5641 verify = sender/callout=5s,maxwait=20s
5643 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5644 to the end before writing, but this should make it even safer).
5646 22. Exim was forgetting that it had advertised PIPELINING for the second and
5647 subsequent messages on an SMTP connection. It was also not resetting its
5648 memory on STARTTLS and an internal HELO.
5650 23. When Exim logs an SMTP synchronization error within a session, it now
5651 records whether PIPELINING has been advertised or not.
5653 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5654 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5655 rather than long int.
5657 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5659 26. Added the never_mail option to autoreply.
5665 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5666 crash if the getsockname() call failed; this can happen if a connection is
5667 closed very soon after it is established. The problem was simply in the
5668 order in which certain operations were done, causing Exim to try to write
5669 to the SMTP stream before it had set up the file descriptor. The bug has
5670 been fixed by making things happen in the correct order.
5676 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5677 before the connection was closed, thus losing the rejection response.
5679 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5680 some early Solaris releases, but causes trouble in current releases where
5681 socklen_t is defined.
5683 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5686 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5689 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5690 that releasing the top of it at the end releases what was used for sub-
5691 expansions (unless the block got too big). However, discard this block if
5692 the first thing is a variable or header, so that we can use its block when
5693 it is dynamic (useful for very large $message_headers, for example).
5695 6. Lookups now cache *every* query, not just the most recent. A new, separate
5696 store pool is used for this. It can be recovered when all lookup caches are
5697 flushed. Lookups now release memory at the end of their result strings.
5698 This has involved some general refactoring of the lookup sources.
5700 7. Some code has been added to the store_xxx() functions to reduce the amount
5701 of flapping under certain conditions.
5703 8. log_incoming_interface used to affect only the <= reception log lines. Now
5704 it causes the local interface and port to be added to several more SMTP log
5705 lines, for example "SMTP connection from", and rejection lines.
5707 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5709 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5711 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5712 could be overwritten at the end of the current message (or the start of a
5713 new message if it was set in a HELO ACL). The value is now preserved for
5714 the duration of the SMTP connection.
5716 12. If a transport had a headers_rewrite setting, and a matching header line
5717 contained an unqualified address, that address was qualified, even if it
5718 did not match any rewriting rules. The underlying bug was that the values
5719 of the flags that permit the existence of unqualified sender and recipient
5720 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5721 non-local messages, and by -bnq for local messages) were not being
5722 preserved with the message after it was received.
5724 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5725 "next input=" as part of the text comprising the host identity instead of
5726 the correct text. The code was using the same buffer for two different
5727 strings. However, depending on which order the printing function evaluated
5728 its arguments, the bug did not always show up. Under Linux, for example, my
5729 test suite worked just fine.
5731 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5732 doesn't work with some older versions of Perl. It has been changed to "my",
5733 which in any case is probably the better facility to use.
5735 15. A really picky compiler found some instances of statements for creating
5736 error messages that either had too many or two few arguments for the format
5739 16. The size of the buffer for calls to the DNS resolver has been increased
5740 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5741 for addresses that have a lot of PTR records. This alleviates a problem; it
5742 does not fully solve it.
5744 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5745 buffer now truncates the list and logs the incident, which is the same
5746 action as happens when Exim is looking up a host name and its aliases.
5747 Previously in this situation something unpredictable would happen;
5748 sometimes it was "internal error: store_reset failed".
5750 18. If a server dropped the connection unexpectedly when an Exim client was
5751 using GnuTLS and trying to read a response, the client delivery process
5752 crashed while trying to generate an error log message.
5754 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5755 string, for example:
5757 warn message = H1: something\nH2: something
5759 the text was added as a single header line from Exim's point of view
5760 though it ended up OK in the delivered message. However, searching for the
5761 second and subsequent header lines using $h_h2: did not work. This has been
5762 fixed. Similarly, if a system filter added multiple headers in this way,
5763 the routers could not see them.
5765 20. Expanded the error message when iplsearch is called with an invalid key to
5766 suggest using net-iplsearch in a host list.
5768 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5769 ACLs are no longer actually imposed (and a message to that effect is
5772 22. If a "gecos" field in a passwd entry contained escaped characters, in
5773 particular, if it contained a \" sequence, Exim got it wrong when building
5774 a From: or a Sender: header from that name. A second bug also caused
5775 incorrect handling when an unquoted " was present following a character
5776 that needed quoting.
5778 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5779 was not being matched caselessly.
5781 24. Arranged for all hyphens in the exim.8 source to be escaped with
5784 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5785 properly. Recipient callout cache records were still being keyed to include
5786 the sender, even when use_sender was set false. This led to far more
5787 callouts that were necessary. The sender is no longer included in the key
5788 when use_sender is false.
5790 26. Added "control = submission" modifier to ACLs.
5792 27. Added the ${base62d: operator to decode base 62 numbers.
5794 28. dnsdb lookups can now access SRV records.
5796 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5797 the configuration file.
5799 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5800 (-v) mode. This makes the output for a verbose queue run more intelligible.
5802 31. Added a use_postmaster feature to recipient callouts.
5804 32. Added the $body_zerocount variable, containing the number of binary zero
5805 bytes in the message body.
5807 33. The time of last modification of the "new" subdirectory is now used as the
5808 "mailbox time last read" when there is a quota error for a maildir
5811 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5813 35. Added +ignore_unknown as a special item in host lists.
5815 36. Code for decoding IPv6 addresses in host lists is now included, even if
5816 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5817 address was recognized as an IP address, but was then not correctly decoded
5818 into binary, causing unexpected and incorrect effects when compared with
5825 1. Very minor rewording of debugging text in manualroute to say "list of
5826 hosts" instead of "hostlist".
5828 2. If verify=header_syntax was set, and a header line with an unqualified
5829 address (no domain) and a large number of spaces between the end of the
5830 name and the colon was received, the reception process suffered a buffer
5831 overflow, and (when I tested it) crashed. This was caused by some obsolete
5832 code that should have been removed. The fix is to remove it!
5834 3. When running in the test harness, delay a bit after writing a bounce
5835 message to get a bit more predictability in the log output.
5837 4. Added a call to search_tidyup() just before forking a reception process. In
5838 theory, someone could use a lookup in the expansion of smtp_accept_max_
5839 per_host which, without the tidyup, could leave open a database connection.
5841 5. Added the variables $recipient_data and $sender_data which get set from a
5842 lookup success in an ACL "recipients" or "senders" condition, or a router
5843 "senders" option, similar to $domain_data and $local_part_data.
5845 6. Moved the writing of debug_print from before to after the "senders" test
5848 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5849 problems for message scanning, either using a data ACL, or using
5850 local_scan() because the Received: header was not generated till after they
5851 were called (in order to set the time as the time of reception completion).
5852 I have revised the way this works. The header is now generated after the
5853 body is received, but before the ACL or local_scan() are called. After they
5854 are run, the timestamp in the header is updated.
5860 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5861 before starting a queue runner without re-exec. This happened only when
5862 deliver_drop_privilege was set or when the Exim user was set to root. The
5863 effect of the bug was that timeouts during subsequent deliveries caused
5864 crashes instead of being properly handled. The handler is now left at its
5865 default (and expected) setting.
5867 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5868 message, again when deliver_drop_privilege is set or Exim is run as root.
5869 The bug described in (1) was not present in this case, but the tidying up
5870 of the other signals was missing. I have made the two cases consistent.
5872 3. The ignore_target_hosts setting on a manualroute router was being ignored
5873 for hosts that were looked up using the /MX notation.
5875 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5878 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5879 operated on the sender address. After changing the $sender_address to <>
5880 for the sender address verify, Exim was re-instated it as the original
5881 (before rewriting) address, but remembering that it had rewritten it, so it
5882 wasn't rewriting it again. This bug also had the effect of breaking the
5883 sender address verification caching when the sender address was rewritten.
5885 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5886 This has been changed so that if the ip literal address matches
5887 ignore_target_hosts, the router declines.
5889 7. Added expansion conditions match_domain, match_address, and match_local_
5890 part (NOT match_host).
5892 8. The placeholder for the Received: header didn't have a length field set.
5894 9. Added code to Exim itself and to exim_lock to test for a specific race
5895 condition that could lead to file corruption when using MBX delivery. The
5896 issue is with the lockfile that is created in /tmp. If this file is removed
5897 after a process has opened it but before that process has acquired a lock,
5898 there is the potential for a second process to recreate the file and also
5899 acquire a lock. This could lead to two Exim processes writing to the file
5900 at the same time. The added code performs the same test as UW imapd; it
5901 checks after acquiring the lock that its file descriptor still refers to
5902 the same named file.
5904 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5905 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5908 11. Added the smtp_active_hostname option. If used, this will typically be made
5909 to depend on the incoming interface address. Because $interface_address is
5910 not set up until the daemon has forked a reception process, error responses
5911 that can happen earlier (such as "too many connections") no longer contain
5914 12. If an expansion in a condition on a "warn" statement fails because a lookup
5915 defers, the "warn" statement is abandoned, and the next ACL statement is
5916 processed. Previously this caused the whole ACL to be aborted.
5918 13. Added the iplsearch lookup type.
5920 14. Added ident_timeout as a log selector.
5922 15. Added tls_certificate_verified as a log selector.
5924 16. Added a global option tls_require_ciphers (compare the smtp transport
5925 option of the same name). This controls incoming TLS connections.
5927 17. I finally figured out how to make tls_require_ciphers do a similar thing
5928 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5929 before starting the TLS session.
5931 18. Tabs are now shown as \t in -bP output.
5933 19. If the log selector return_path_on_delivery was set, Exim crashed when
5934 bouncing a message because it had too many Received: header lines.
5936 20. If two routers both had headers_remove settings, and the first one included
5937 a superfluous trailing colon, the final name in the first list and the
5938 first name in the second list were incorrectly joined into one item (with a
5939 colon in the middle).
5945 1. Added -C and -D options to the exinext utility, mainly to make it easier
5946 to include in the automated testing, but these could be helpful when
5947 multiple configurations are in use.
5949 2. The exinext utility was not formatting the output nicely when there was
5950 an alternate port involved in the retry record key, nor when there was a
5951 message id as well (for retries that were specific to a specific message
5952 and a specific host). It was also confused by IPv6 addresses, because of
5953 the additional colons they contain. I have fixed the IPv4 problem, and
5954 patched it up to do a reasonable job for IPv6.
5956 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5957 delivery, the log line now contains "pipelined" if PIPELINING was used.
5959 4. An SMTP transport process used to panic and die if the bind() call to set
5960 an explicit outgoing interface failed. This has been changed; it is now
5961 treated in the same way as a connect() failure.
5963 5. A reference to $sender_host_name in the part of a conditional expansion
5964 that was being skipped was still causing a DNS lookup. This no longer
5967 6. The def: expansion condition was not recognizing references to header lines
5968 that used bh_ and bheader_.
5970 7. Added the _cache feature to named lists.
5972 8. The code for checking quota_filecount in the appendfile transport was
5973 allowing one more file than it should have been.
5975 9. For compatibility with Sendmail, the command line option
5983 and sets the incoming protocol and host name (for trusted callers). The
5984 host name and its colon can be omitted when only the protocol is to be set.
5985 Note the Exim already has two private options, -pd and -ps, that refer to
5986 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5987 "s", but I don't think that's a major issue.
5989 10. A number of refactoring changes to the code, none of which should affect
5992 (a) The number of logging options was getting close to filling up the
5993 32-bit word that was used as a bit map. I have split them into two classes:
5994 those that are passed in the argument to log_write(), and those that are
5995 only ever tested independently outside of that function. These are now in
5996 separate 32-bit words, so there is plenty of room for expansion again.
5997 There is no change in the user interface or the logging behaviour.
5999 (b) When building, for example, log lines, the code previously used a
6000 macro that called string_cat() twice, in order to add two strings. This is
6001 not really sufficiently general. Furthermore, there was one instance where
6002 it was actually wrong because one of the argument was used twice, and in
6003 one call a function was used. (As it happened, calling the function twice
6004 did not affect the overall behaviour.) The macro has been replaced by a
6005 function that can join an arbitrary number of extra strings onto a growing
6008 (c) The code for expansion conditions now uses a table and a binary chop
6009 instead of a serial search (which was left over from when there were very
6010 few conditions). Also, it now recognizes conditions like "pam" even when
6011 the relevant support is not compiled in: a suitably worded error message is
6012 given if an attempt is made to use such a condition.
6014 11. Added ${time_interval:xxxxx}.
6016 12. A bug was causing one of the ddress fields not to be passed back correctly
6017 from remote delivery subprocesses. The field in question was not being
6018 subsequently used, so this caused to problems in practice.
6020 13. Added new log selectors queue_time and deliver_time.
6022 14. Might have fixed a bug in maildirsizefile handling that threw up
6023 "unexpected character" debug warnings, and recalculated the data
6024 unnecessarily. In any case, I expanded the warning message to give more
6027 15. Added the message "Restricted characters in address" to the statements in
6028 the default ACL that block characters like @ and % in local parts.
6030 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6031 Three changes have been made:
6033 (a) There was a serious bug; a negative response to MAIL caused the whole
6034 recipient domain to be cached as invalid, thereby blocking all messages
6035 to all local parts at the same domain, from all senders. This bug has
6036 been fixed. The domain is no longer cached after a negative response to
6037 MAIL if the sender used is not empty.
6039 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6042 (c) A new callout option, "use_sender" has been added for people who want
6043 the modified behaviour.
6049 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6052 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6053 indeed breaks things for older releases.
6055 3. Added additional logging to the case where there is a problem reading data
6056 from a filter that is running in a subprocess using a pipe, in order to
6057 try to track down a specific problem.
6059 4. Testing facility fudge: when running in the test harness and attempting
6060 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6061 getting "No route to host". Convert this to a timeout.
6063 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6066 6. Some OS don't have socklen_t but use size_t instead. This affects the
6067 fifth argument of getsockopt() amongst other things. This is now
6068 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6069 can be set for individual OS. I have set it for SunOS5, OSF1, and
6070 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6071 some earlier ones do not.
6073 7. Change 4.30/15 was not doing the test caselessly.
6075 8. The standard form for an IPv6 address literal was being rejected by address
6076 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6077 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6078 this, as well as the form without the "IPv6" on the front (but only when
6079 address literals are enabled, of course).
6081 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6083 10. Exim crashed if a message with an empty sender address specified by -f
6084 encountered a router with an errors_to setting. This could be provoked only
6085 by a command such as
6089 where an empty string was supplied; "<>" did not hit this bug.
6091 11. Installed PCRE release 4.5.
6093 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6094 remained set. It is now erased.
6096 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6097 times from message ids (which are base 36 rather than the normal 62).
6099 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6100 were being counted as actual protocol errors, and logged if the log
6101 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6102 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6103 and DATA following a set of rejected RCPTs do not count as protocol errors.
6104 In other words, Exim assumes they were pipelined, though this may not
6105 actually be the case. Of course, in all cases the client gets an
6106 appropriate error code.
6108 15. If a lookup fails in an ACL condition, a message about the failure may
6109 be available; it is used if testing the ACL cannot continue, because most
6110 such messages specify what the cause of the deferral is. However, some
6111 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6112 that caused an old message to be retained and used if a later statement
6113 caused a defer, replacing the real cause of the deferral.
6115 16. If an IP address had so many PTR records that the DNS lookup buffer
6116 was not large enough to hold them, Exim could crash while trying to process
6117 the truncated data. It now detects and logs this case.
6119 17. Further to 4.21/58, another change has been made: if (and only if) the
6120 first line of a message (the first header line) ends with CRLF, a bare LF
6121 in a subsequent header line has a space inserted after it, so as not to
6122 terminate the header.
6124 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6125 unnecessarily, used atoi() instead of strtol(), and didn't check the
6126 termination when getting file sizes from file names by regex.
6128 19. Completely re-implemented the support for maildirsize files, in the light
6129 of a number of problems with the previous contributed implementation
6130 (4.30/29). In particular:
6132 . If the quota is zero, the maildirsize file is maintained, but no quota is
6135 . If the maildir directory does not exist, it is created before any attempt
6136 to write a maildirsize file.
6138 . The quota value in the file is just a cache; if the quota is changed in
6139 the transport, the new value overrides.
6141 . A regular expression is available for excluding directories from the
6144 20. The autoreply transport checks the characters in options that define the
6145 message's headers; it allows continued headers, but it was checking with
6146 isspace() after an embedded newline instead of explicitly looking for a
6149 21. If all the "regular" hosts to which an address was routed had passed their
6150 expiry times, and had not reached their retry times, the address was
6151 bounced, even if fallback hosts were defined. Now Exim should go on to try
6154 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6155 equivalent code in the SMTP transport. Some hosts send humungous responses
6156 to HELO/EHLO, more than 1024 it seems.
6158 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6159 gives compiler warnings in some environments. I've now done it "properly",
6162 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6163 (because of problems with the built-in one) was declared to return uschar *
6164 instead of char *, causing compiler failure.
6166 25. Fixed a file descriptor leak when processing alias/forward files.
6168 26. Fixed a minor format string issue in dbfn.c.
6170 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6172 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6173 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6176 29. When a sender address is verified, it is cached, to save repeating the test
6177 when there is more than one recipient in a message. However, when the
6178 verification involves a callout, it is possible for different callout
6179 options to be set for different recipients. It is too complicated to keep
6180 track of this in the cache, so now Exim always runs a verification when a
6181 callout is required, relying on the callout cache for the optimization.
6182 The overhead is duplication of the address routing, but this should not be
6185 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6186 to be verified with callout=postmaster, and the main callout worked but the
6187 postmaster check failed, the verification correctly failed. However, if a
6188 subsequent RCPT command asked for sender verification *without* the
6189 postmaster check, incorrect caching caused this verification also to fail,
6192 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6193 it was not caching the DNS options (qualify_single, search_parents) that
6194 were used when the lookup failed. A subsequent lookup with different
6195 options therefore always gave the same answer, though there were cases
6196 where it should not have. (Example: a "domains = !$mx_any" option on a
6197 dnslookup router: the "domains" option is always processed without any
6198 widening, but the router might have qualify_single set.) Now Exim uses the
6199 cached value only when the same options are set.
6201 32. Added John Jetmore's "exipick" utility to the distribution.
6203 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6204 than a timeout (e.g. a certificate is required, and is not provided), an
6205 Exim server now closes the connection immediately. Previously it waited for
6206 the client to close - but if the client is SSL, it seems that they each
6207 wait for each other, leading to a delay before one of them times out.
6209 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6210 maintained 0.8.x compatibility because I don't think many are using it, and
6211 it is clearly obsolete.
6213 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6216 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6217 client certificate was expired. A simple patch fixes this, though I don't
6218 understand the full logic of why the verify callback is called multiple
6221 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6222 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6223 which causes problems with some clients (such as the Certicom SSL Plus
6224 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6225 disables the coutermeasure allowing Eudora to connect."
6227 38. Exim was not checking that a write() to a log file succeeded. This could
6228 lead to Bad Things if a log got too big, in particular if it hit a file
6229 size limit. Exim now panics and dies if it cannot write to a log file, just
6230 as it does if it cannot open a log file.
6232 39. Modified OS/Makefile-Linux so that it now contains
6234 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6236 The two -D definitions ensure that Exim is compiled with large file
6237 support, which makes it possible to handle log files that are bigger than
6240 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6241 instance) a domain was checked against a named list that involved a lookup,
6242 causing $domain_data to be set, then another domain was checked against the
6243 same list, then the first domain was re-checked, the value of $domain_data
6244 after the final check could be wrong. In particular, if the second check
6245 failed, it could be set empty. This bug probably also applied to
6248 41. The strip_trailing_dot option was not being applied to the address given
6249 with the -f command-line option.
6251 42. The code for reading a message's header from the spool was incrementing
6252 $received_count, but never initializing it. This meant that the value was
6253 incorrect (doubled) while delivering a message in the same process in which
6254 it was received. In the most common configuration of Exim, this never
6255 happens - a fresh exec is done - but it can happen when
6256 deliver_drop_privilege is set.
6258 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6259 it now includes up to 150 characters of the unexpected data in the log
6262 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6263 and building data strings. The size of both of these buffers was 10 000
6264 bytes - far larger than anybody would *ever* want, thought I. Needless to
6265 say, somebody hit the limit. I have increased the maximum line length to
6266 20 000 and the maximum data length of concatenated lines to 100 000. I have
6267 also fixed two bugs, because there was no checking on these buffers. Tsk,
6268 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6269 buffer is too small.
6271 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6272 lsearch lookups. Now it does.
6274 46. When parsing a route_list item in a manualroute router, a fixed-length
6275 buffer was used for the list of hosts. I made this 1024 bytes long,
6276 thinking that nobody would ever have a list of hosts that long. Wrong.
6277 Somebody had a whole pile of complicated expansion conditions, and the
6278 string was silently truncated, leading to an expansion error. It turns out
6279 that it is easier to change to an unlimited length (owing to other changes
6280 that have happened since this code was originally written) than to build
6281 structure for giving a limitation error. The length of the item that
6282 expands into the list of hosts is now unlimited.
6284 47. The lsearch lookup could not handle data where the length of text line was
6285 more than 4095 characters. Such lines were truncated, leading to shortened
6286 data being returned. It should now handle lines of any length.
6288 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6289 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6292 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6293 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6294 no longer happens in comment lines. A list of replacements is now placed
6295 at the head of all of the source files, except those whose only change is
6296 to replace PERL_COMMAND in the very first #! line.
6298 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6299 messages on the queue, with a bottom-up merge sort, using code contributed
6300 by Michael Haardt. This should make operations like -bp somewhat faster on
6301 large queues. It won't affect queue runners, except when queue_run_in_order
6304 51. Installed eximstats 1.31 in the distribution.
6306 52. Added support for SRV lookups to the dnslookup router.
6308 53. If an ACL referred to $message_body or $message_body_end, the value was not
6309 reset for any messages that followed in the same SMTP session.
6311 54. The store-handling optimization for building very long strings was not
6312 differentiating between the different store pools. I don't think this
6313 actually made any difference in practice, but I've tidied it.
6315 55. While running the routers to verify a sender address, $sender_address
6316 was still set to the sender address. This is wrong, because when routing to
6317 send a bounce to the sender, it would be empty. Therefore, I have changed
6318 it so that, while verifying a sender address, $sender_address is set to <>.
6319 (There is no change to what happens when verifying a recipient address.)
6321 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6322 target A or AAAA records (if not already returned) without resetting the
6323 qualify_single or search_parents options of the DNS resolver. These are
6324 inappropriate in this case because the targets of MX and SRV records must
6325 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6326 target that, when qualified, matched something in the local domain. These
6327 two options are now turned off when doing these lookups.
6329 57. It seems that at least some releases of Reiserfs (which does not have the
6330 concept of a fixed number of inodes) returns zero and not -1 for the
6331 number of available inodes. This interacted badly with check_spool_inodes,
6332 which assumed that -1 was the "no such thing" setting. What I have done is
6333 to check that the total number of inodes is greater than zero before doing
6334 the test of how many are available.
6336 58. When a "warn" ACL statement has a log_message modifier, the message is
6337 remembered, and not repeated. This is to avoid a lot of repetition when a
6338 message has many recipients that cause the same warning to be written.
6339 However, Exim was preserving the list of already written lines for an
6340 entire SMTP session, which doesn't seem right. The memory is now reset if a
6341 new message is started.
6343 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6344 debugging output unless log_rewrite was also set.
6346 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6347 of (int)(handle) when we know that handle contains (void *)(-1).
6349 61. The Exim daemon panic-logs an error return when it closes the incoming
6350 connection. However "connection reset by peer" seems to be common, and
6351 isn't really an error worthy of noting specially, so that particular error
6354 62. When Exim is trying to find all the local interfaces, it used to panic and
6355 die if the ioctl to get the interface flags failed. However, it seems that
6356 on at least one OS (Solaris 9) it is possible to have an interface that is
6357 included in the list of interfaces, but for which you get a failure error
6358 for this call. This happens when the interface is not "plumbed" into a
6359 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6360 failure of the "get flags" call assumes that the interface is down.
6362 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6363 makes life easier for people who are doing arithmetic on fields extracted
6364 from dates, where you often get leading zeros that should not be
6365 interpreted as octal.
6367 64. Added qualify_domain to the redirect router, to override the global
6370 65. If a pathologically long header line contained very many addresses (the
6371 report of this problem mentioned 10 000) and each of them was rewritten,
6372 Exim could use up a very large amount of memory. (It kept on making new
6373 copies of the header line as it rewrote, and never released the old ones.)
6374 At the expense of a bit more processing, the header rewriting function has
6375 been changed so that it no longer eats memory in this way.
6377 66. The generation of the Received: header has been moved from the time that a
6378 message starts to be received, to the time that it finishes. The timestamp
6379 in the Received: header should now be very close to that of the <= log
6380 line. There are two side-effects of this change:
6382 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6383 logged header lines no longer include the local Received: line, because
6384 it has not yet been created. The same applies to a copy of the message
6385 that is returned to a non-SMTP sender when a message is rejected.
6387 (b) When a filter file is tested using -bf, no additional Received: header
6388 is added to the test message. After some thought, I decided that this
6391 This change does not affect the value of $received_for. It is still set
6392 after address rewriting, but before local_scan() is called.
6394 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6396 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6397 gave an unhelpful panic error message, and a defer error. I have managed to
6398 change this behaviour so that it now rejects any supplied certificate,
6399 which seems right, as the list of acceptable certificates is empty.
6401 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6402 gave an unhelpful defer error. I have not managed to make this reject any
6403 supplied certificates, but the error message it gives is "no certificate
6404 supplied", which is not helpful.
6406 70. exigrep's output now also includes lines that are not associated with any
6407 message, but which match the given pattern. Implemented by a patch from
6408 Martin Sluka, which also tidied up the Perl a bit.
6410 71. Recipient callout verification, like sender verification, was using <> in
6411 the MAIL FROM command. This isn't really the right thing, since the actual
6412 sender may affect whether the remote host accepts the recipient or not. I
6413 have changed it to use the actual sender in the callout; this means that
6414 the cache record is now keyed on a recipient/sender pair, not just the
6415 recipient address. There doesn't seem to be a real danger of callout loops,
6416 since a callout by the remote host to check the sender would use <>.
6417 [SEE ABOVE: changed after hitting problems.]
6419 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6420 temporary errors. However, in the case of such a code being given after
6421 the end of a data transmission (i.e. after ".") Exim was failing to write
6422 a retry record for the message. (Yes, there was some broken host that was
6423 actually sending 8xx at this point.)
6425 73. An unknown lookup type in a host list could cause Exim to panic-die when
6426 the list was checked. (An example that provoked this was putting <; in the
6427 middle of a list instead of at the start.) If this happened during a DATA
6428 ACL check, a -D file could be left lying around. This kind of configuration
6429 error no longer causes Exim to die; instead it causes a defer error. The
6430 incident is still logged to the main and panic logs.
6432 74. Buglet left over from Exim 3 conversion. The message "too many messages
6433 in one connection" was written to the rejectlog but not the mainlog, except
6434 when address rewriting (yes!) was being logged.
6436 75. Added write_rejectlog option.
6438 76. When a system filter was run not as root (that is, when system_filter_user
6439 was set), the values of the $n variables were not being returned to the
6440 main process; thus, they were not subsequently available in the $sn
6443 77. Added +return_path_on_delivery log selector.
6445 78. A connection timeout was being treated differently from recipients deferred
6446 when testing hosts_max_try with a message that was older than the host's
6447 retry timeout. (The host should not be counted, thus allowing all hosts to
6448 be tried at least once before bouncing.) This may have been the cause of an
6449 occasionally reported bug whereby a message would remain on the queue
6450 longer than the retry timeout, but would be bounced if a delivery was
6451 forced. I say "may" because I never totally pinned down the problem;
6452 setting up timeout/retry tests is difficult. See also the next item.
6454 79. The ultimate address timeout was not being applied to errors that involved
6455 a combination of host plus message (for example, a timeout on a MAIL
6456 command). When an address resolved to a number of possible hosts, and they
6457 were not all tried for each delivery (e.g. because of hosts_max_try), a
6458 message could remain on the queue longer than the retry timeout.
6460 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6463 81. Fixed an obscure SMTP outgoing bug which required at least the following
6464 conditions: (a) there was another message waiting for the same server;
6465 (b) the server returned 5xx to all RCPT commands in the first message so
6466 that the message was not completed; (c) the server dropped the connection
6467 or gave a negative response to the RSET that Exim sends to abort the
6468 transaction. The observed case was a dropped connection after DATA that had
6469 been sent in pipelining mode. That is, the server had advertised PIPELINING
6470 but was not implementing it correctly. The effect of the bug was incorrect
6471 behaviour, such as trying another host, and this could lead to a crash.
6477 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6478 and daemon.c were passed as pointers to ints; they should have been
6479 pointers to socklen_t variables (which are typically unsigned ints).
6481 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6484 3. Fixed a really odd bug that affected only the testing scheme; patching a
6485 certain fixed string in the binary changed the value of another string that
6486 happened to be identical to the end of the original first string.
6488 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6489 name", it returns that address as the IP address. On some operating
6490 systems (e.g. Solaris), it also passes back the IP address string as the
6491 "host name". However, on others (e.g. Linux), it passes back an empty
6492 string. Exim wasn't checking for this, and was changing the host name to an
6493 empty string, assuming it had been canonicalized.
6495 5. Although rare, it is permitted to have more than one PTR record for a given
6496 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6497 all the names associated with an address, because they do in Solaris.
6498 However, it seems that they do not in Linux for data that comes from the
6499 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6500 I found this out when I moved to a new Linux workstation and tried to run
6501 the Exim test suite.
6503 To get round this problem I have changed the code so that it now does its
6504 own call to the DNS to look up PTR records when searching for a host name.
6505 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6506 addresses that are only in /etc/hosts are still found.
6508 This behaviour is, however, controlled by an option called host_lookup_
6509 order, which defaults to "bydns:byaddr". If people want to use the other
6510 order, or indeed, just use one or the other means of lookup, they can
6511 specify it in this variable.
6513 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6514 some operating systems, this comes back from gethostbyaddr() as an empty
6515 string, and this is what Exim used to test for. However, it seems that in
6516 other systems, "." is yielded. Exim now tests for this case too.
6518 7. The values of check_spool_space and check_log_space are now held internally
6519 as a number of kilobytes instead of an absolute number of bytes. If a
6520 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6521 kilobyte. This means that much larger values can be stored.
6523 8. Exim monitor: an attempt to get the action menu when not actually pointing
6524 at a message produces an empty menu entitled "No message selected". This
6525 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6526 no entries in it ("Shell widget menu has zero width and/or height"). So I
6527 have added a single, blank menu entry in this case.
6529 9. Added ${quote_local_part.
6531 10. MIME decoding is now applied to the contents of Subject: header lines when
6534 11. Now that a reference to $sender_host_address automatically causes a reverse
6535 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6536 host lookup before query-style lookups in lists that might use this
6537 variable. This has therefore been abolished, and the "net-" prefix is no
6538 longer necessary for query-style lookups.
6540 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6541 have been a typo for LFLAGS, so it has been changed.
6543 13. The install script calls Exim with "-C /dev/null" in order to find the
6544 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6545 to be output. However, since Exim outputs its version number before the
6546 error, it didn't break the script. It just looked ugly. I fixed this by
6547 always allowing "-C /dev/null" if the caller is root.
6549 14. Ignore overlarge ACL variable number when reading spool file - insurance
6550 against a later release with more variables having written the file.
6552 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6553 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6554 this, as well as the form without the "IPv6" on the front.
6556 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6557 OS/Makefile-Darwin file.
6559 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6560 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6562 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6563 variable. However, some OS use ints for inodes. I've added cast to long int
6564 to get rid of the compiler warning.
6566 19. I had forgotten to lock out "/../" in configuration file names when
6567 ALT_CONFIG_PREFIX was set.
6569 20. Routers used for verification do not need to specify transports. However,
6570 if such a router generated a host list, and callout was configured, Exim
6571 crashed, because it could not find a port number from the (non-existent)
6572 transport. It now assumes port 25 in this circumstance.
6574 21. Added the -t option to exigrep.
6576 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6577 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6578 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6579 them is set, LOOKUP_LSEARCH is forced.
6581 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6583 24. Added sender and host information to the "rejected by local_scan()" log
6584 line; previously there was no indication of these.
6586 25. Added .include_if_exists.
6588 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6589 Linux. It turns out that not all file systems support this. Apparently some
6590 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6591 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6592 not supported on the file descriptor, is now ignored when Exim is trying to
6593 sync a directory. This applies only to Linux.
6595 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6597 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6598 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6601 29. Added support for maildirsize files from supplied patch (modified a bit).
6603 30. The use of :fail: followed by an empty string could lead Exim to respond to
6604 sender verification failures with (e.g.):
6606 550 Verification failed for <xxx>
6607 550 Sender verify failed
6609 where the first response line was missing the '-' that indicates it is not
6610 the final line of the response.
6612 31. The loop for finding the name of the user that called Exim had a hardwired
6613 limit of 10; it now uses the value of finduser_retries, which is used for
6614 all other user lookups.
6616 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6619 33. Exim was neglecting to zero errno before one call of strtol() when
6620 expanding a string and expecting an integer value. On some systems this
6621 resulted in spurious "integer overflow" errors. Also, it was casting the
6622 result into an int without checking.
6624 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6625 did not work. The code looks as if it has *never* worked, though it appears
6626 to have been documented since at least release 1.62. I have made it work.
6628 35. The "timeout_DNS" error in retry rules, also documented since at least
6629 1.62, also never worked. As it isn't clear exactly what this means, and
6630 clearly it isn't a major issue, I have abolished the feature by treating it
6631 as "timeout", and writing a warning to the main and panic logs.
6633 36. The display of retry rules for -brt wasn't always showing the error code
6636 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6637 timeout_connect_A, timeout_connect_MX.
6639 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6640 to the empty sender.
6642 39. The daemon was not analysing the content of -oX till after it had closed
6643 stderr and disconnected from the controlling terminal. This meant that any
6644 syntax errors were only noted on the panic log, and the return code from
6645 the command was 0. By re-arranging the code a little, I've made the
6646 decoding happen first, so such errors now appear on stderr, and the return
6647 code is 1. However, the actual setting up of the sockets still happens in
6648 the disconnected process, so errors there are still only recorded on the
6651 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6652 connections (as happens on some IP stacks) was logged at start up time as
6653 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6654 it from "IPv6 and IPv4", which means that two separate sockets are being
6657 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6658 says whether AF_INET or AF_INET6 was passed as an argument.
6660 42. Exiwhat output was messed up when time zones were included in log
6663 43. Exiwhat now gives more information about the daemon's listening ports,
6664 and whether -tls-on-connect was used.
6666 44. The "port" option of the smtp transport is now expanded.
6668 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6669 silently ignored. Now an error message is written to the main and panic
6672 46. There's a new ACL modifier called "logwrite" which writes to a log file
6673 as soon as it is encountered.
6675 47. Added $local_user_uid and $local_user_gid at routing time.
6677 48. Exim crashed when trying to verify a sender address that was being
6680 49. Exim was recognizing only a space character after ".include". It now also
6681 recognizes a tab character.
6683 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6684 extracting the relevant information from the specification. The man page no
6685 longer contains scrambled data for the -d option, and I've added a section
6686 at the front about calling Exim under different names.
6688 51. Added "extra_headers" argument to the "mail" command in filter files.
6690 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6693 53. Installed eximstats 1.29.
6695 54. Added transport_filter_timeout as a generic transport option.
6697 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6698 Cc: header lines. This was required by RFC 822, but it not required by RFC
6701 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6702 incoming messages that did not have them. Now it does so only if the
6703 message originates locally, that is, if there is no associated remote host
6704 address. When Resent- header lines are present, this applies to the Resent-
6705 lines rather than the non-Resent- lines.
6707 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6708 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6710 58. Messages for configuration errors now include the name of the main
6711 configuration file - useful now that there may be more than one file in a
6712 list (.included file names were always shown).
6714 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6715 for those rare installations that do not start the daemon as root or run it
6716 setuid root. I've cut out the call to initgroups() if the daemon is not
6719 60. The Exim user and group can now be bound into the binary as text strings
6720 that are looked up at the start of Exim's processing.
6722 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6724 62. Added $mailstore_basename variable.
6726 63. Installed patch to sieve.c from Michael Haardt.
6728 64. When Exim failed to open the panic log after failing to open the main log,
6729 the original message it was trying to log was written to stderr and debug
6730 output, but if they were not available (the usual case in production), it
6731 was lost. Now it is written to syslog before the two lines that record the
6732 failures to open the logs.
6734 65. Users' Exim filters run in subprocesses under the user's uid. It is
6735 possible for a "deliver" command or an alias in a "personal" command to
6736 provoke an address rewrite. If logging of address rewriting is configured,
6737 this fails because the process is not running as root or exim. There may be
6738 a better way of dealing with this, but for the moment (because 4.30 needs
6739 to be released), I have disabled address rewrite logging when running a
6740 filter in a non-root, non-exim process.
6746 1. The buildconfig auxiliary program wasn't quoting the value set for
6747 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6748 not defined. This bug was masked in 4.22 by the effect that was fixed in
6751 2. Some messages that were rejected after a message id was allocated were
6752 shown as "incomplete" by exigrep. It no longer does this for messages that
6753 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6755 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6756 have allow_domain_literals set, the ID did not get logged in the <= line.
6757 Domain literals are now always recognized in Message-ID: header lines.
6759 4. The first argument for a ${extract expansion item is the key name or field
6760 number. Leading and trailing spaces in this item were not being ignored,
6761 causing some misleading effects.
6763 5. When deliver_drop_privilege was set, single queue runner processes started
6764 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6765 same command in the process it spins off) were not dropping privilege.
6767 6. When the daemon running as "exim" started a queue runner, it always
6768 re-executed Exim in the spun-off process. This is a waste of effort when
6769 deliver_drop_privilege is set. The new process now just calls the
6770 queue-runner function directly.
6776 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6779 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6780 ignored. Though the use of -oP was forcing the writing of a pid file, it
6781 was always written to the default place.
6783 3. If the message "no IP address found for host xxxx" is generated during
6784 incoming verification, it is now followed by identification of the incoming
6785 connection (so you can more easily find what provoked it).
6787 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6789 5. Added some features to "harden" Exim a bit more against certain attacks:
6791 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6792 be put in Local/Makefile. This is like the never_users runtime option,
6793 but it cannot be overridden. The default setting is "root".
6795 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6796 prefix string with which any file named in a -C command line option
6799 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6800 is retained for -C and -D only if the caller of Exim is root. Without
6801 it, the exim user may also use -C and -D and retain privilege.
6803 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6804 command line option is disabled.
6806 6. Macro names set by the -D option must start with an upper case letter, just
6807 like macro names defined in the configuration file.
6809 7. Added "dereference=" facility to LDAP.
6811 8. Two instances of the typo "uknown" in the source files are fixed.
6813 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6814 the Configure-Makefile script screwed up while processing it.
6816 10. Incorporated PCRE 4.4.
6818 11. The SMTP synchronization check was not operating right at the start of an
6819 SMTP session. For example, it could not catch a HELO sent before the client
6820 waited for the greeting. There is now a check for outstanding input at the
6821 point when the greeting is written. Because of the duplex, asynchronous
6822 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6823 way, but not yet received, when the check is performed.
6825 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6826 on TCP/IP sockets, because this apparently causes some broken clients to
6829 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6830 unchanged) from the Cygwin maintainer.
6832 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6833 was supported instead of testing for mbx. Effectively a typo.
6835 15. The spa authenticator server code was not checking that the input it
6836 received was valid base64.
6838 16. The debug output line for the "set" modifier in ACLs was not showing the
6839 name of the variable that was being set.
6841 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6843 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6844 lookup on its own. Something else was needed to trigger the lookup. For
6845 example, a match in host_lookup or the need for a host name in a host list.
6846 Now, if $sender_host_name is referenced and the host name has not yet been
6847 looked up, a lookup is performed. If the lookup fails, the variable remains
6848 empty, and $host_lookup_failed is set to "1".
6850 19. Added "eqi" as a case-independent comparison operator.
6852 20. The saslauthd authentication condition could segfault if neither service
6853 nor realm was specified.
6855 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6856 error message that was logged was misleading, and incoming SMTP
6857 connections were dropped. The message is now more accurate, and temporary
6858 errors are given to SMTP connections.
6860 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6861 (except RSET) with a 421 error, until QUIT is received. However, it was
6862 failing to send a response to QUIT.
6864 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6865 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6866 ACL is now run after the helo_try_verify_hosts code.
6868 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6869 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6870 case-independent, so other case variants are also recognized). Apparently
6871 some systems use these upper case variants.
6873 25. If more than two messages were waiting for the same host, and a transport
6874 filter was specified for the transport, Exim sent two messages over the
6875 same TCP/IP connection, and then failed with "socket operation on non-
6876 socket" when it tried to send the third.
6878 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6880 27. The extern definition of crypt16() in expand.c was not being excluded when
6881 the OS had its own crypt16() function.
6883 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6884 as a preferred synonym for return_size_limit, both as an option and as an
6887 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6889 30. Changed the default configuration ACL to relax the local part checking rule
6890 for addresses that are not in any local domains. For these addresses,
6891 slashes and pipe symbols are allowed within local parts, but the sequence
6892 /../ is explicitly forbidden.
6894 31. SPA server authentication was not clearing the challenge buffer before
6897 32. log_message in a "warn" ACL statement was writing to the reject log as
6898 well as to the main log, which contradicts the documentation and doesn't
6899 seem right (because no rejection is happening). So I have stopped it.
6901 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6902 However, I am unable to do any testing of this.
6904 34. Fixed an infelicity in the appendfile transport. When checking directories
6905 for a mailbox, to see if any needed to be created, it was accidentally
6906 using path names with one or more superfluous leading slashes; tracing
6907 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6909 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6910 contents are added to the log line that is written for every discarded
6911 recipient. (Previously a log_message setting was ignored.)
6913 36. The ${quote: operator now quotes the string if it is empty.
6915 37. The install script runs exim in order to find its version number. If for
6916 some reason other than non-existence or emptiness, which it checks, it
6917 could not run './exim', it was installing it with an empty version number,
6918 i.e. as "exim-". This error state is now caught, and the installation is
6921 38. An argument was missing from the function that creates an error message
6922 when Exim fails to connect to the socket for saslauthd authentication.
6923 This could cause Exim to crash, or give a corrupted message.
6925 39. Added isip, isip4, and isip6 to ${if conditions.
6927 40. The ACL variables $acl_xx are now saved with the message, and can be
6928 accessed later in routers, transports, and filters.
6930 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6931 strings in the file are not string-expanded.
6933 42. If a MAIL command specified a SIZE value that was too large to fit into an
6934 int variable, the check against message_size_limit failed. Such values are
6935 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6936 day this will have to be increased, but I don't think I want to be around
6937 when emails are that large.
6944 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6945 iconv() is not standard in FreeBSD.
6947 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6948 IPv6 enabled. The observed symptom was a segmentation fault on return from
6949 the function os_common_find_running_interfaces() in src/os.c.
6951 3. In the check_special_case() function in daemon.c I had used "errno" as an
6952 argument name, which causes warnings on some systems. This was basically a
6953 typo, since it was named "eno" in the comments!
6955 4. The code that waits for the clock to tick (at a resolution of some fraction
6956 of a second) so as to ensure message-id uniqueness was always waiting for
6957 at least one whole tick, when it could have waited for less. [This is
6958 almost certainly not relevant at current processor speeds, where it is
6959 unlikely to ever wait at all. But we try to future-proof.]
6961 5. The function that sleeps for a time interval that includes fractions of a
6962 second contained a race. It did not block SIGALRM between setting the
6963 timer, and suspending (a couple of lines later). If the interval was short
6964 and the sigsuspend() was delayed until after it had expired, the suspension
6965 never ended. On busy systems this could lead to processes getting stuck for
6968 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6969 process, before it forks any delivery processes. The open lookup caching
6970 mechanism meant that the open file or database connection was passed into
6971 the delivery process. The problem was that delivery processes always tidy
6972 up cached lookup data. This could cause a problem for the next delivery
6973 process started by the queue runner, because the external queue runner
6974 process does not know about the closure. So the next delivery process
6975 still has data in the lookup cache. In the case of a file lookup, there was
6976 no problem because closing a file descriptor in a subprocess doesn't affect
6977 the parent. However, if the lookup was caching a connection to a database,
6978 the connection was closed, and the second delivery process was likely to
6979 see errors such as "PGSQL: query failed: server closed the connection
6980 unexpectedly". The problem has been fixed by closing all cached lookups
6981 in a queue runner before running a delivery process.
6983 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6984 seem to have the "const" qualifier which it has on other OS. I've
6987 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6988 *of the same type* (client or server) with the same public name that an
6989 error should be diagnosed.
6991 9. When Exim looked up a host name for an IP address, but failed to find the
6992 original IP address when looking up the host name (a safety check), it
6993 output the message "<ip address> does not match any IP for NULL", which was
6994 confusing, to say the least. The bug was that the host name should have
6995 appeared instead of "NULL".
6997 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6998 user that is built into the binary, and the -C or -D options is used, root
6999 privilege is dropped before the configuration file is read. In addition,
7000 logging is switched to stderr instead of the normal log files. If the
7001 configuration then re-defines the Exim user, the unprivileged environment
7002 is probably not what is expected, so Exim logs a panic warning message (but
7005 However, if deliver_drop_privilege is set, the unprivileged state may well
7006 be exactly what is intended, so the warning has been cut out in that case,
7007 and Exim is allowed to try to write to its normal log files.
7013 1. smtp_return_error_details was not giving details for temporary sender
7014 or receiver verification errors.
7016 2. Diagnose a configuration error if two authenticators have the same public
7019 3. Exim used not to create the message log file for a message until the first
7020 delivery attempt. This could be confusing when incoming messages were held
7021 for policy or load reasons. The message log file is now created at the time
7022 the message is received, and an initial "Received" line is written to it.
7024 4. The automatically generated man page for command line options had a minor
7025 bug that caused no ill effects; however, a more serious problem was that
7026 the procedure for building the man page automatically didn't always
7027 operate. Consequently, release 4.20 contains an out-of-date version. This
7028 shouldn't happen again.
7030 5. When building Exim with embedded Perl support, the script that builds the
7031 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7032 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7034 6. The freeze_tell option was not being used for messages that were frozen on
7035 arrival, either by an ACL or by local_scan().
7037 7. Added the smtp_incomplete_transaction log selector.
7039 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7040 was accepting AUTH without a new EHLO.
7042 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7043 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7046 10. Logging of TCP/IP connections (when configured) now happens in the main
7047 daemon process instead of the child process, so that the TCP/IP connection
7048 count is more accurate (but it can never be perfect).
7050 11. The use of "drop" in a nested ACL was not being handled correctly in the
7051 outer ACL. Now, if condition failure induced by the nested "drop" causes
7052 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7053 or "require"), the connection is dropped.
7055 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7056 that yield "discard" can now be used with an "accept" or a "discard" verb,
7057 but an error is generated for any others (because I can't see a useful way
7058 to define what should happen).
7060 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7061 are now processed in the same way as lines in the Exim configuration file.
7062 In particular, continuation lines are supported.
7064 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7066 15. Added -ti meaning -t -i.
7068 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7069 domains, and warn by logging if others are found.
7071 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7072 returned from GIFCONF when Exim is trying to find the list of interfaces on
7073 a host. The code in os.c has been modified to copy each ifreq to an aligned
7074 structure in all cases.
7076 Also, in some cases, the returned ifreq's were being copied to a 'struct
7077 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7078 means the last couple of bytes of an IPv6 address could be chopped if the
7079 ifreq contained only a normal sockaddr (14 bytes storage).
7081 18. Named domain lists were not supported in the hosts_treat_as_local option.
7082 An entry such as +xxxx was not recognized, and was treated as a literal
7085 19. Ensure that header lines added by a DATA ACL are included in the reject log
7086 if the ACL subsequently rejects the message.
7088 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7089 MD5 (which is deprecated).
7091 21. When testing a filter file using -bf, Exim was writing a message when it
7092 took the sender from a "From " line in the message, but it was not doing so
7093 when it took $return_path from a Return-Path: header line. It now does.
7095 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7096 with a valid header line field name (a series of printing characters
7097 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7099 23. Changed "disc" in the source to "disk" to conform to the documentation and
7100 the book and for uniformity.
7102 24. Ignore Sendmail's -Ooption=value command line item.
7104 25. When execve() failed while trying to run a command in a pipe transport,
7105 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7106 could be confused with a return value of 69 from the command itself. This
7107 has been changed to 127, the value the shell returns if it is asked to run
7108 a non-existent command. The wording for the related log line suggests a
7109 non-existent command as the problem.
7111 26. If received_header_text expands to an empty string, do not add a Received:
7112 header line to the message. (Well, it adds a token one on the spool, but
7113 marks it "old" so that it doesn't get used or transmitted.)
7115 27. Installed eximstats 1.28 (addition of -nt option).
7117 28. There was no check for failure on the call to getsockname() in the daemon
7118 code. This can fail if there is a shortage of resources on the system, with
7119 ENOMEM, for example. A temporary error is now given on failure.
7121 29. Contrary to the C standard, it seems that in some environments, the
7122 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7123 program. Exim now does this explicitly; it affects the formatting of
7124 timestamps using strftime().
7126 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7127 complaints. I've now initialized all the variables, to avoid this.
7129 32. Header lines added by a system filter were not being "seen" during
7130 transport-time rewrites.
7132 33. The info_callback() function passed to OpenSSL is set up with type void
7133 (*)(SSL *, int, int), as described somewhere. However, when calling the
7134 function (actually a macro) that sets it up, the type void(*)() is
7135 expected. I've put in a cast to prevent warnings from picky compilers.
7137 34. If a DNS black list lookup found a CNAME record, but there were no A
7138 records associated with the domain it pointed at, Exim crashed.
7140 35. If a DNS black list lookup returned more than one A record, Exim ignored
7141 all but the first. It now scans all returned addresses if a particular IP
7142 value is being sought. In this situation, the contents of the
7143 $dnslist_value variable are a list of all the addresses, separated by a
7146 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7147 to accept a host name and all its aliases if the forward lookup for any of
7148 them yielded the IP address of the incoming connection. Now it accepts only
7149 those names whose forward lookup yields the correct IP address. Any other
7150 names are discarded. This closes a loophole whereby a rogue DNS
7151 administrator could create reverse DNS records to break through a
7152 wildcarded host restriction in an ACL.
7154 37. If a user filter or a system filter that ran in a subprocess used any of
7155 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7156 the wrong values were passed to the pipe command ($thisaddress had the
7157 value of $0, $0 had the value of $1, etc). This bug was introduced by
7158 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7160 38. Improved the line breaking for long SMTP error messages from ACLs.
7161 Previously, if there was no break point between 40 and 75 characters, Exim
7162 left the rest of the message alone. Two changes have been made: (a) I've
7163 reduced the minimum length to 35 characters; (b) if it can't find a break
7164 point between 35 and 75 characters, it looks ahead and uses the first one
7165 that it finds. This may give the occasional overlong line, but at least the
7166 remaining text gets split now.
7168 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7169 file descriptors might be low, and that setting 1000 would always raise it.
7170 It turns out that in some environments, the limit is already over 1000 and
7171 that lowering it causes trouble. So now Exim takes care not to decrease it.
7173 40. When delivering a message, the value of $return_path is set to $sender_
7174 address at the start of routing (routers may change the value). By an
7175 oversight, this default was not being set up when an address was tested by
7176 -bt or -bv, which affected the outcome if any router or filter referred to
7179 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7180 log only when "message" or "log_message" are set. However, if one of the
7181 conditions was an address verification, or a call to a nested ACL, the
7182 messages generated by the underlying test were being passed through. This
7183 no longer happens. The underlying message is available in $acl_verify_
7184 message for both "message" and "log_message" expansions, so it can be
7185 passed through if needed.
7187 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7188 new expansion $bh_ to give the encoded byte string without charset
7189 translation. Translation happens only if iconv() is available; HAVE_ICONV
7190 indicates this at build time. HEADERS_CHARSET gives the charset to
7191 translate to; headers_charset can change it in the configuration, and
7192 "headers charset" can change it in an individual filter file.
7194 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7195 that creates RFC 2047 encoded "words" labels them as that charset instead
7196 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7197 expansion operator; (ii) when Exim creates a From: line for a local
7198 message; (iii) when a header line is rewritten to include a "phrase" part.
7200 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7201 buggy, causing it to skip the first lines of messages whose message ID
7202 ended in 'D'. This would not have bitten before Exim release 4.14, because
7203 message IDs were unlikely to end in 'D' before then. The effect was to have
7204 incorrect size information for certain domains.
7206 45. #include "config.h" was missing at the start of the crypt16.c module. This
7207 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7210 46. If there was a timeout during a "random" callout check, Exim treated it as
7211 a failure of the random address, and carried on sending RSET and the real
7212 address. If the delay was just some slowness somewhere, the response to the
7213 original RCPT would be taken as a response to RSET and so on, causing
7214 mayhem of various kinds.
7216 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7217 when I implemented it. It didn't allow for the fact that some option values
7218 may legitimately be negative (e.g. size_addition), and it didn't even do
7219 the right test for positive values.
7221 48. Domain names in DNS records are case-independent. Exim always looks them up
7222 in lower case. Some resolvers return domain names in exactly the case they
7223 appear in the zone file, that is, they may contain uppercase letters. Not
7224 all resolvers do this - some return always lower case. Exim was treating a
7225 change of case by a resolver as a change of domain, similar to a widening
7226 of a domain abbreviation. This triggered its re-routing code and so it was
7227 trying to route what was effectively the same domain again. This normally
7228 caused routing to fail (because the router wouldn't handle the domain
7229 twice). Now Exim checks for this case specially, and just changes the
7230 casing of the domain that it ultimately uses when it transmits the message
7233 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7236 50. If a filter generated a file delivery with a non-absolute name (possible if
7237 no home directory exists for the router), the forbid_file option was not
7240 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7241 the existing equality matching.
7243 52. Exim was using ints instead of ino_t variables in some places where it was
7244 dealing with inode numbers.
7246 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7247 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7248 called TMPDIR, and if it finds it is different, it changes its value.
7250 54. The smtp_printf() function is now made available to local_scan() so
7251 additional output lines can be written before returning. There is also an
7252 smtp_fflush() function to enable the detection of a dropped connection.
7253 The variables smtp_input and smtp_batched_input are exported to
7256 55. Changed the default runtime configuration: the message "Unknown user"
7257 has been removed from the ACL, and instead placed on the localuser router,
7258 using the cannot_route_message feature. This means that any verification
7259 failures that generate their own messages won't get overridden. Similarly,
7260 the "Unrouteable address" message that was in the ACL for unverifiable
7261 relay addresses has also been removed.
7263 56. Added hosts_avoid_esmtp to the smtp transport.
7265 57. The exicyclog script was not checking for the esoteric option
7266 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7267 will work only if exicyclog is run under the appropriate euid.
7269 58. Following a discussion on the list, the rules by which Exim recognises line
7270 endings on incoming messages have been changed. The -dropcr and drop_cr
7271 options are now no-ops, retained only for backwards compatibility. The
7272 following line terminators are recognized: LF CRLF CR. However, special
7273 processing applies to CR:
7275 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7276 nor a local message in the state where . is a terminator.
7278 (ii) If a bare CR is encountered in a header line, an extra space is added
7279 after the line terminator so as not to end the header. The reasoning
7280 behind this is that bare CRs in header lines are most likely either
7281 to be mistakes, or people trying to play silly games.
7283 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7284 was being incorrectly given as 18 bytes larger than it should have been.
7285 This is a VOB (very old bug).
7287 60. This may never have affected anything current, but just in case it has:
7288 When the local host is found other than at the start of a list of hosts,
7289 the local host, those with the same MX, and any that follow, are discarded.
7290 When the list in question was part of a longer list of hosts, the following
7291 hosts (not currently being processed) were also being discarded. This no
7292 longer happens. I'm not sure if this situation could ever has previously
7295 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7298 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7299 header. This is something that is recommended in a new Internet Draft, and
7300 is something that is documented as being done by Sendmail. There are two
7301 possible values. For messages generated by the autoreply transport, Exim
7304 Auto-Submitted: auto-replied
7306 whereas for all other generated messages (e.g. bounces) it adds
7308 Auto-Submitted: auto-generated
7310 63. The "personal" condition in filters now includes a test for the
7311 Auto-Submitted: header. If it contains the string "auto-" the message it
7312 not considered personal.
7314 64. Added rcpt_include_affixes as a generic transport option.
7316 65. Added queue_only_override (default true).
7318 66. Added the syslog_duplication option.
7320 67. If what should have been the first header line of a message consisted of
7321 a space followed by a colon, Exim was mis-interpreting it as a header line.
7322 It isn't of course - it is syntactically invalid and should therefore be
7323 treated as the start of the message body. The misbehaviour could have
7324 caused a number of strange effects, including loss of data in subsequent
7325 header lines, and spool format errors.
7327 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7328 client host had authenticated. This control can now be exercised by an ACL
7329 for more flexibility.
7331 69. By default, callouts do not happen when testing with -bh. There is now a
7332 variant, -bhc, which does actually run the callout code, including
7333 consulting and updating the callout cache.
7335 70. Added support for saslauthd authentication, courtesy of Alexander
7338 71. If statvfs() failed on the spool or log directories while checking their
7339 size for availability, Exim confusingly gave the error "space shortage".
7340 Furthermore, in debugging mode it crashed with a floating point exception.
7341 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7342 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7343 serious problem, Exim now writes to the main and panic logs when this
7344 happens, with details of the failure. It then refuses to accept the
7345 incoming message, giving the message "spool directory problem" or "log
7346 directory problem" with a 421 code for SMTP messages.
7348 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7349 0, 1, and 2 exist, because some OS complain for execs without them (see
7350 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7351 descriptors. However, the code omitted to check that the open succeeded,
7352 causing mysterious errors if for some reason the permissions on /dev/null
7353 got screwed. Now Exim writes a message to the main and panic logs, and
7354 bombs out if it can't open /dev/null.
7356 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7357 interact so that it is all more flexible. It is supposed to remain
7358 backwards compatible. Also added extra_local_interfaces.
7360 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7361 to bomb out with an assertion failure - to the client this appears as a
7362 connection drop. This problem occurs in the part of the code that was taken
7363 from the Samba project. Fortunately, the assertion is in a very simple
7364 function, so I have fixed this by reproducing the function inline in the
7365 one place where it is called, and arranging for authentication to fail
7366 instead of killing the process with assert().
7368 75. The SPA client code was not working when the server requested OEM rather
7369 than Unicode encoding.
7371 76. Added code to make require_files with a specific uid setting more usable in
7372 the case where statting the file as root fails - usually a non-root-mounted
7373 NFS file system. When this happens and the failure is EACCES, Exim now
7374 forks a subprocess and does the per-uid checking as the relevant uid.
7376 77. Added process_log_path.
7378 78. If log_file_path was not explicitly set, a setting of check_log_space or
7379 check_log_inodes was ignored.
7381 79. If a space check for the spool or log partitions fails, the incident is now
7382 logged. Of course, in the latter case the data may get lost...
7384 80. Added the %p formatting code to string_format() so that it can be used to
7385 print addresses in debug_print(). Adjusted all the address printing in the
7386 debugging in store.c to use %p rather than %d.
7388 81. There was a concern that a line of code in smtp_in.c could overflow a
7389 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7390 initially expressed, the concern was not well-founded, because trailing
7391 spaces are removed early. However, if the trailing spaces were followed by
7392 a NULL, they did not get removed, so the overflow was possible. Two fixes
7395 (a) I re-wrote the offending code in a cleaner fashion.
7396 (b) If an incoming SMTP command contains a NULL character, it is rejected
7399 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7400 runs initgroups(), so that if the Exim user is in any additional groups,
7401 they will be used during message reception.
7407 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob