1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
10 HS/01 Handle trailing backslash gracefully. (CVE-2019-15846)
16 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917, OVE-20190718-0006)
22 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
23 buffer overrun for (non-chunking) other transports.
25 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
26 TLS1.3, means that a server rejecting a client certificate is not visible
27 to the client until the first read of encrypted data (typically the
28 response to EHLO). Add detection for that case and treat it as a failed
29 TLS connection attempt, so that the normal retry-in-clear can work (if
32 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
33 and/or domain. Found and fixed by Jason Betts.
35 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
36 configuration). If a CNAME target was not a wellformed name pattern, a
39 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
40 the OS reports them interleaved with other addresses.
42 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
43 used both for input and for a verify callout, both encrypted, SMTP
44 responses being sent by the server could be lost. This resulted in
45 dropped connections and sometimes bounces generated by a peer sending
48 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
49 string. Previously it was possible to cause undefined behaviour in a
50 library routine (usually a crash). Found by "zerons".
52 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
55 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
56 API was removed, so update to use the newer ones.
63 JH/01 Remove code calling the customisable local_scan function, unless a new
64 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
66 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
67 non-signal-safe functions being used.
69 JH/03 Bug 2269: When presented with a received message having a stupidly large
70 number of DKIM-Signature headers, disable DKIM verification to avoid
71 a resource-consumption attack. The limit is set at twenty.
73 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
74 report of oldest_pass in ${authres } in consequence, and separate out
75 some descriptions of reasons for verification fail.
77 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
78 files in the spool were present and unlocked. A queue-runner could spot
79 them, resulting in a duplicate delivery. Fix that by doing the unlock
80 after the unlink. Investigation by Tim Stewart. Take the opportunity to
81 add more error-checking on spoolfile handling while that code is being
84 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
85 No known attacks, no CVE, this is defensive hardening.
87 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
88 a queue-runner could start a delivery while other operations were ongoing.
89 Cutthrough delivery was a common victim, resulting in duplicate delivery.
90 Found and investigated by Tim Stewart. Fix by using the open message data
91 file handle rather than opening another, and not locally closing it (which
92 releases a lock) for that case, while creating the temporary .eml format
93 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
95 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
96 $sender_verify_failure/$recipient_verify_failure to "random".
98 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
101 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
102 Previously this would segfault.
104 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
107 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
108 like zero, since the resolver should be doing this for us, But we need one
109 as a CNAME but no MX presence gets the CNAME returned; we need to check
110 that doesn't point to an MX to declare it "no MX returned" rather than
111 "error, loop". A new main option is added so the older capability of
112 following some limited number of chain links is maintained.
114 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
116 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
117 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
118 now-deprecated earlier definitions used only specified the range up to TLS
119 1.2 (in the older-version library docs).
121 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
123 JH/15 Rework TLS client-side context management. Stop using a global, and
124 explicitly pass a context around. This enables future use of TLS for
125 connections to service-daemons (eg. malware scanning) while a client smtp
126 connection is using TLS; with cutthrough connections this is quite likely.
128 JH/16 Fix ARC verification to do AS checks in reverse order.
130 JH/17 Support a "tls" option on the ${readsocket } expansion item.
132 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
133 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
134 Previously the "utf8" would be re-prepended for every additional message.
136 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
137 Previously thery were accepted, resulting in issues when attempting to
138 forward messages to a non-supporting MTA.
140 PP/02 Let -n work with printing macros too, not just options.
142 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
143 one parent address was copied, and bogus data was used at delivery-logging
144 time. Either a crash (after delivery) or bogus log data could result.
145 Discovery and analysis by Tim Stewart.
147 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
148 Previously if the string ended mid-character, we did not insert the
149 promised '?' replacement.
151 PP/04 Documentation: current string operators work on bytes, not codepoints.
153 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
154 should pack well giving a smaller memory footprint so better caching and
155 therefore performance. Group the declarations where this can't be done so
156 that the byte-sized flag variables are not interspersed among pointer
157 variables, giving a better chance of good packing by the compiler.
159 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
160 non-null, to avoid issues with sites running BATV. Previously reports were
161 sent with an empty envelope sender so looked like bounces.
163 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
164 The ignore_error flag wasn't being returned from the filter subprocess so
165 was not set for later routers. Investigation and fix by Matthias Kurz.
167 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
168 and a msg:complete for the whole, when a message is manually removed using
169 -Mrm. Developement by Matthias Kurz, hacked on by JH.
171 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
172 a "Gnu special" function, asprintf() in the DB utility binary builds; I
173 hope that is portable enough.
175 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
176 requiring a known-CA anchor certificate; make it now rely entirely on the
177 TLSA as an anchor. Checking the name on the leaf cert against the name
178 on the A-record for the host is still done for TA (but not for EE mode).
180 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
181 included in delivery lines for non-proxied connections, when compiled with
182 SUPPORT_SOCKS and running with proxy logging enabled.
184 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
185 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
186 move the existing event to fire before the normal logging of message
187 failure so that custom logging is bracketed by normal logging.
189 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
190 msg:fail:internal event. Developement by Matthias Kurz.
192 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
193 far too small for todays use of crypto signatures stored there. Go all
194 the way to the max DNS message size of 64kB, even though this might be
195 overmuch for IOT constrained device use.
197 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
198 copy a string over itself. The library routine is documented as not
199 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
201 JH/32 For main options check_spool_space and check_inode_space, where the
202 platform supports 64b integers, support more than the previous 2^31 kB
203 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
204 the previous G, M, k.
206 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
207 $authenticated_fail_id variable on authentication failure. Previously
210 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
211 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
212 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
213 GNUTLS_SEC_PARAM_MEDIUM.
215 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
216 side. Previously we would continue as if no SNI had been received.
218 JH/36 Harden the handling of string-lists. When a list consisted of a sole
219 "<" character, which should be a list-separator specification, we walked
220 off past the nul-terimation.
222 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
223 causes) even when the retry time is not yet met. Previously they were
224 not, meaning that when (say) an account was over-quota and temp-rejecting,
225 and multiple senders' messages were queued, only one sender would get
226 notified on each configured delay_warning cycle.
228 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
230 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
231 cipher-suites, an error can be left on the stack even for a succeeding
232 accept; this results in impossible error messages when a later operation
235 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
236 return error codes indicating retry. Under TLS1.3 this becomes required.
238 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
239 it only wrote the new authenticators, resulting in a lack of tracking of
240 peer changes of ESMTP extensions until the next cache flush.
242 JH/41 Fix the loop reading a message header line to check for integer overflow,
243 and more-often against header_maxsize. Previously a crafted message could
244 induce a crash of the recive process; now the message is cleanly rejected.
246 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
247 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
253 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
254 When redis_servers is set to a list of > 1 element, and the Redis servers
255 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
256 case of MOVED into a DEFER case instead, thus moving the query onto the
257 next server in the list. For a cluster of N elements, all N servers must
258 be defined in redis_servers.
260 GF/02 Catch and remove uninitialized value warning in exiqsumm
261 Check for existence of @ARGV before looking at $ARGV[0]
263 JH/01 Replace the store_release() internal interface with store_newblock(),
264 which internalises the check required to safely use the old one, plus
265 the allocate and data copy operations duplicated in both (!) of the
266 extant use locations.
268 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
269 modifier. This matches the restriction on the commandline.
271 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
272 Previously only the last row was returned.
274 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
275 we assumed that tags in the header were well-formed, and parsed the
276 element content after inspecting only the first char of the tag.
277 Assumptions at that stage could crash the receive process on malformed
280 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
281 While running the DKIM ACL we operate on the Permanent memory pool so that
282 variables created with "set" persist to the DATA ACL. Also (at any time)
283 DNS lookups that fail create cache records using the Permanent pool. But
284 expansions release any allocations made on the current pool - so a dnsdb
285 lookup expansion done in the DKIM ACL releases the memory used for the
286 DNS negative-cache, and bad things result. Solution is to switch to the
287 Main pool for expansions.
288 While we're in that code, add checks on the DNS cache during store_reset,
289 active in the testsuite.
290 Problem spotted, and debugging aided, by Wolfgang Breyha.
292 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
293 When none of the hosts presented to a transport match an already-open
294 connection, close it and proceed with the list. Previously we would
295 queue the message. Spotted by Lena with Yahoo, probably involving
298 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
299 Previously a spurious "250 OK id=" response was appended to the proper
302 JH/08 The "support for" informational output now, which built with Content
303 Scanning support, has a line for the malware scanner interfaces compiled
304 in. Interface can be individually included or not at build time.
306 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
307 by the template makefile "src/EDITME". The "STREAM" support for an older
308 ClamAV interface method is removed.
310 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
311 rows affected is given instead).
313 JH/11 The runtime Berkeley DB library version is now additionally output by
314 "exim -d -bV". Previously only the compile-time version was shown.
316 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
317 SMTP connection. Previously, when one had more receipients than the
318 first, an abortive onward connection was made. Move to full support for
319 multiple onward connections in sequence, handling cutthrough connection
320 for all multi-message initiating connections.
322 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
323 routers. Previously, a multi-recipient message would fail to match the
324 onward-connection opened for the first recipient, and cause its closure.
326 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
327 a timeout on read on a GnuTLS initiating connection, resulting in the
328 initiating connection being dropped. This mattered most when the callout
329 was marked defer_ok. Fix to keep the two timeout-detection methods
332 JH/15 Relax results from ACL control request to enable cutthrough, in
333 unsupported situations, from error to silently (except under debug)
334 ignoring. This covers use with PRDR, frozen messages, queue-only and
337 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
339 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
340 metadata, resulting in a crash in free().
342 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
343 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
344 Broken also in d185889f4, with init system revamp.
346 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
347 Previously we abruptly closed the connection after reading a malware-
348 found indication; now we go on to read the "scan ok" response line,
351 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
352 ACL. Previously, a crash would result.
354 JH/19 Speed up macro lookups during configuration file read, by skipping non-
355 macro text after a replacement (previously it was only once per line) and
356 by skipping builtin macros when searching for an uppercase lead character.
358 JH/20 DANE support moved from Experimental to mainline. The Makefile control
359 for the build is renamed.
361 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
362 was allocated for every new TLS startup, meaning one per message. Fix
363 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
365 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
366 reported the original. Fix to report (as far as possible) the ACL
367 result replacing the original.
369 JH/23 Fix memory leak during multi-message connections using STARTTLS under
370 OpenSSL. Certificate information is loaded for every new TLS startup,
371 and the resources needed to be freed.
373 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
375 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
378 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
379 DATA response info to the (existing) per-recipient response info for
380 the "C=" log element. It can have useful tracking info from the
381 destination system. Patch from Simon Arlott.
383 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
384 length value. Previously this would segfault.
386 HS/02 Support Avast multiline protoocol, this allows passing flags to
387 newer versions of the scanner.
389 JH/28 Ensure that variables possibly set during message acceptance are marked
390 dead before release of memory in the daemon loop. This stops complaints
391 about them when the debug_store option is enabled. Discovered specifically
392 for sender_rate_period, but applies to a whole set of variables.
393 Do the same for the queue-runner and queue-list loops, for variables set
394 from spool message files. Do the same for the SMTP per-message loop, for
395 certain variables indirectly set in ACL operations.
397 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
398 as a multi-recipient message from a mailinglist manager). The coding had
399 an arbitrary cutoff number of characters while checking for more input;
400 enforced by writing a NUL into the buffer. This corrupted long / fast
401 input. The problem was exposed more widely when more pipelineing of SMTP
402 responses was introduced, and one Exim system was feeding another.
403 The symptom is log complaints of SMTP syntax error (NUL chars) on the
404 receiving system, and refused recipients seen by the sending system
405 (propating to people being dropped from mailing lists).
406 Discovered and pinpointed by David Carter.
408 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
409 replaced by the ${authresults } expansion.
411 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
413 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
414 allows proper process termination in container environments.
416 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
417 Previously the "final dot" had a newline after it; ensure it is CR,LF.
419 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
420 and "err_perm", deprecated since 4.83 when the RFC-defined words
421 "temperror" and "permerror" were introduced.
423 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
424 transport-filters or DKIM-signing. The restriction was lost in the
425 consolidation of verify-callout and delivery SMTP handling.
426 Extend the restriction to also cover ARC-signing.
428 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
429 in defer=pass mode supply a 450 to the initiator. Previously the message
432 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
433 tls_require_ciphers is used as before.
435 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
436 "pass_unscanned". Only tmpfails from the scanner are written to
437 the paniclog, as they may require admin intervention (permission
438 denied, license issues). Other scanner errors (like decompression
439 bombs) do not cause a paniclog entry.
441 JH/36 Fix reinitialisation of DKIM logging variable between messages.
442 Previously it was possible to log spurious information in receive log
445 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
446 triggered odd behaviour from Outlook Express clients.
448 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
451 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
452 since the IETF WG has not yet settled on that versus the original
453 "bare" representation.
455 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
456 Previously the millisecond value corrupted the output.
457 Fix also for syslog_pid=no and log_selector +pid, for which the pid
458 corrupted the output.
464 JH/01 Rework error string handling in TLS interface so that the caller in
465 more cases is responsible for logging. This permits library-sourced
466 string to be attached to addresses during delivery, and collapses
467 pairs of long lines into single ones.
469 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
470 during configuration. Wildcards are allowed and expanded.
472 JH/02 Rework error string handling in DKIM to pass more info back to callers.
473 This permits better logging.
475 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
476 do not close it down and have the child transport start it up again on
477 the passed-on TCP connection. Instead, proxy the child (and any
478 subsequent ones) for TLS via a unix-domain socket channel. Logging is
479 affected: the continued delivery log lines do not have any DNSSEC, TLS
480 Certificate or OCSP information. TLS cipher information is still logged.
482 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
483 identical IP addresses on different listening ports. Will also affect
486 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
487 add noisy ifdef guards to special-case this sillyness.
488 Patch from Bernd Kuhls.
490 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
491 than 255 are no longer allowed.
493 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
494 Disable the session-cache too, which might reduce our load. Since we
495 currrectly use a new context for every connection, both as server and
496 client, there is no benefit for these.
497 GnuTLS appears to not support tickets server-side by default (we don't
498 call gnutls_session_ticket_enable_server()) but client side is enabled
499 by default on recent versions (3.1.3 +) unless the PFS priority string
502 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
503 <https://reproducible-builds.org/specs/source-date-epoch/>.
505 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
506 the check for any unsuccessful recipients did not notice the limit, and
507 erroneously found still-pending ones.
509 JH/08 Pipeline CHUNKING command and data together, on kernels that support
510 MSG_MORE. Only in-clear (not on TLS connections).
512 JH/09 Avoid using a temporary file during transport using dkim. Unless a
513 transport-filter is involved we can buffer the headers in memory for
514 creating the signature, and read the spool data file once for the
515 signature and again for transmission.
517 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
518 4.77 as the kernel support then wasn't solid, having issues in 64bit
519 mode. Now, it's been long enough. Add support for FreeBSD also.
521 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
522 case where the routing stage had gathered several addresses to send to
523 a host before calling the transport for the first, we previously failed
524 to close down TLS in the old transport process before passing the TCP
525 connection to the new process. The new one sent a STARTTLS command
526 which naturally failed, giving a failed delivery and bloating the retry
527 database. Investigation and fix prototype from Wolfgang Breyha.
529 JH/12 Fix check on SMTP command input synchronisation. Previously there were
530 false-negatives in the check that the sender had not preempted a response
531 or prompt from Exim (running as a server), due to that code's lack of
532 awareness of the SMTP input buffering.
534 PP/04 Add commandline_checks_require_admin option.
535 Exim drops privileges sanely, various checks such as -be aren't a
536 security problem, as long as you trust local users with access to their
537 own account. When invoked by services which pass untrusted data to
538 Exim, this might be an issue. Set this option in main configuration
539 AND make fixes to the calling application, such as using `--` to stop
542 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
543 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
544 responses to those, into a single TLS record each way (this usually means
545 a single packet). As a side issue, smtp_enforce_sync now works on TLS
548 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
549 affects you only if you're dancing at the edge of the param size limits.
550 If you are, and this message makes sense to you, then: raise the
551 configured limit or use OpenSSL 1.1. Nothing we can do for older
554 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
555 cmdline element to get the documented default one. Previously it was
558 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
559 are unsuable for non-message-specific reasons - eg. connection timeout,
560 banner-time rejection.
562 JH/16 Fix logging of delivery remote port, when specified by router, under
565 PP/06 Repair manualroute's ability to take options in any order, even if one
566 is the name of a transport.
569 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
571 JH/17 Change the list-building routines interface to use the expanding-string
572 triplet model, for better allocation and copying behaviour.
574 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
575 Previously it was constructed the first time a possibly-matching string
576 was met in the configuration file input during startup; now it is done
579 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
580 compatible one, to avoid the (poorly documented) possibility of a config
581 file in the working directory redirecting the DB files, possibly correpting
582 some existing file. CVE-2017-10140 assigned for BDB.
584 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
585 cache-hot. Previously, although the result was properly cached, the
586 initial verify call returned a defer.
588 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
589 the main verify for receipient in uncached-mode.
591 JH/22 Retire historical build files to an "unsupported" subdir. These are
592 defined as "ones for which we have no current evidence of testing".
594 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
595 if present. Previously it was ignored.
597 JH/24 Start using specified-initialisers in C structure init coding. This is
598 a C99 feature (it's 2017, so now considered safe).
600 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
601 if was a fixed-sized field and bitmask ops via macros; it is now more
604 PP/07 GitHub PR 56: Apply MariaDB build fix.
605 Patch provided by Jaroslav Škarvada.
607 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
608 during Coverity cleanups [4.87 JH/47]
609 Diagnosis and fix provided by Michael Fischer v. Mollard.
611 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
612 the right size to place the terminating semicolon on its own folded
613 line, the header hash was calculated to an incorrect value thanks to
614 the (relaxed) space the fold became.
616 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
617 and confused the parent.
619 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
620 which could crash as a result. This could lead to undeliverable messages.
622 JH/28 Logging: "next input sent too soon" now shows where input was truncated
625 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
626 matters on fast-turnover and PID-randomising systems, which were getting
627 out-of-order delivery.
629 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
630 a possibly-overlapping copy. The symptom was that "Remote host closed
631 connection in response to HELO" was logged instead of the actual 4xx
634 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
635 Previously only that bufferd was discarded, resulting in SYMTP command
638 JH/32 DKIM: when a message has multiple signatures matching an identity given
639 in dkim_verify_signers, run the dkim acl once for each. Previously only
640 one run was done. Bug 2189.
642 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
643 "panic the current process" to "deliberately defer". The panic log is
644 still written with the problem list name; the mail and reject logs now
645 get a temp-reject line for the message that was being handled, saying
646 something like "domains check lookup or other defer". The SMTP 451
647 message is still "Temporary local problem".
649 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
650 A crafted sequence of BDAT commands could result in in-use memory beeing
651 freed. CVE-2017-16943.
653 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
654 from SMTP input. Previously it was always done; now only done for DATA
655 and not BDAT commands. CVE-2017-16944.
657 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
658 to the message (such as an overlong header line). Previously this was
659 not done and we did not exit BDAT mode. Followon from the previous item
660 though a different problem.
666 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
667 than -2003 did; needs libidn2 in addition to libidn.
669 JH/02 The path option on a pipe transport is now expanded before use.
671 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
672 Patch provided by "Björn", documentation fix added too.
674 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
675 missing a wire-to-host endian conversion.
677 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
678 close after a BDAT command line could be taken as a following command,
679 giving a synch failure. Fix by only checking for synch immediately
680 before acknowledging the chunk.
682 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
683 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
684 macro. Patches provided by Josh Soref.
686 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
687 Previously we did not; the RFC seems ambiguous and VRFY is not listed
688 by IANA as a service extension. However, John Klensin suggests that we
691 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
692 the dkim code may be unix-mode line endings rather than smtp wire-format
693 CRLF, so prepend a CR to any bare LF.
695 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
696 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
698 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
699 the first were themselves being wrongly included in the feed into dkim
700 processing; with most chunk sizes in use this resulted in an incorrect
701 body hash calculated value.
703 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
704 DKIM signature block, for verification. Although advised against by
705 standards it is specifically not ruled illegal.
707 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
709 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
710 missing a body hash (the bh= tag).
712 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
713 It seems that HAProxy sends the Proxy Protocol information in clear and
714 only then does a TLS startup, so do the same.
716 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
717 TCP connections (such as for Spamd) unless the daemon successfully set
718 Fast Open mode on its listening sockets. This fixes breakage seen on
719 too-old kernels or those not configured for Fast Open, at the cost of
720 requiring both directions being enabled for TFO, and TFO never being used
721 by non-daemon-related Exim processes.
723 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
724 endings, at least on the first header line. Try to canonify any that get
725 past that check, despite the cost.
727 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
728 now limited to an arbitrary five deep, while parsing addresses with the
729 strip_excess_angle_brackets option enabled.
731 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
732 instead leave the unprompted TLS handshake in socket buffer for the
733 TLS library to consume.
735 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
737 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
739 JH/16 Drop variables when they go out of scope. Memory management drops a whole
740 region in one operation, for speed, and this leaves assigned pointers
741 dangling. Add checks run only under the testsuite which checks all
742 variables at a store-reset and panics on a dangling pointer; add code
743 explicitly nulling out all the variables discovered. Fixes one known
744 bug: a transport crash, where a dangling pointer for $sending_ip_address
745 originally assigned in a verify callout, is re-used.
747 PP/06 Drop '.' from @INC in various Perl scripts.
749 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
751 PP/08 Reduce a number of compilation warnings under clang; building with
752 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
753 should be warning-free.
755 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
757 HS/01 Fix portability problems introduced by PP/08 for platforms where
758 realloc(NULL) is not equivalent to malloc() [SunOS et al].
760 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
761 chunk. This allows us to accept broken chunked messages. We need a more
762 general solution here.
764 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
765 already-broken messages in the queue.
767 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
769 JH/19 Fix reference counting bug in routing-generated-address tracking.
775 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
776 supports it and a size is available (ie. the sending peer gave us one).
778 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
779 years of being deprecated). The replacements are the ACLs
780 acl_smtp_mime and acl_not_smtp_mime.
782 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
783 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
784 or even an in-clear connection were permitted. Now, if the host lookup
785 was dnssec and dane was requested then the host is only used if the
786 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
787 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
788 if one fails this test.
789 This means that a poorly-configured remote DNS will make it incommunicado;
790 but it protects against a DNS-interception attack on it.
792 JH/04 Bug 1810: make continued-use of an open smtp transport connection
793 non-noisy when a race steals the message being considered.
795 JH/05 If main configuration option tls_certificate is unset, generate a
796 self-signed certificate for inbound TLS connections.
798 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
799 in rewrites and routers.
801 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
802 and logged a warning sing 4.83; now they are a configuration file error.
804 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
805 (lacking @domain). Apply the same qualification processing as RCPT.
807 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
809 JH/10 Support ${sha256:} applied to a string (as well as the previous
812 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
813 a cutthrough deliver is pending, as we always want to make a connection.
814 This also avoids re-routing the message when later placing the cutthrough
815 connection after a verify cache hit.
816 Do not update it with the verify result either.
818 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
819 when routing results in more than one destination address.
821 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
822 signing (which inhibits the cutthrough capability). Previously only
823 the presence of an option was tested; now an expansion evaluating as
824 empty is permissible (obviously it should depend only on data available
825 when the cutthrough connection is made).
827 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
828 the relevant preceding SMTP command did not note the pipelining mode.
830 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
831 Previously they were not counted.
833 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
834 as one having no matching records. Previously we deferred the message
835 that needed the lookup.
837 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
838 distinguished as "(=".
840 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
841 for missing MX records. Previously it only worked for missing A records.
843 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
845 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
846 after the data-go-ahead and data-ack. Patch from Jason Betts.
848 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
849 even for a "none" policy. Patch from Tony Meyer.
851 JH/22 Fix continued use of a connection for further deliveries. If a port was
852 specified by a router, it must also match for the delivery to be
855 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
856 When one of the recipients of a message was unsuitable for the connection
857 (has no matching addresses), we lost track of needing to mark it
858 deferred. As a result mail would be lost.
860 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
862 JH/25 Decoding ACL controls is now done using a binary search; the source code
863 takes up less space and should be simpler to maintain. Merge the ACL
864 condition decode tables also, with similar effect.
866 JH/26 Fix problem with one_time used on a redirect router which returned the
867 parent address unchanged. A retry would see the parent address marked as
868 delivered, so not attempt the (identical) child. As a result mail would
871 JH/27 Fix a possible security hole, wherein a process operating with the Exim
872 UID can gain a root shell. Credit to http://www.halfdog.net/ for
873 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
876 JH/28 Enable {spool,log} filesystem space and inode checks as default.
877 Main config options check_{log,spool}_{inodes,space} are now
878 100 inodes, 10MB unless set otherwise in the configuration.
880 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
881 Previously it only applied to the main-section connection policy
884 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
886 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
887 by me. Added RFC7919 DH primes as an alternative.
889 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
890 are not in the system include path.
892 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
893 GnuTLS, when a session startup failed (eg because the client disconnected)
894 Exim did stdio operations after fclose. This was exposed by a recent
895 change which nulled out the file handle after the fclose.
897 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
898 signed directly by the cert-signing cert, rather than an intermediate
899 OCSP-signing cert. This is the model used by LetsEncrypt.
901 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
903 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
904 an incoming connection.
906 HS/02 Bug 1802: Do not half-close the connection after sending a request
909 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
910 fallback to "prime256v1".
912 JH/34 SECURITY: Use proper copy of DATA command in error message.
913 Could leak key material. Remotely exploitable. CVE-2016-9963.
919 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
920 and 3.4.4 - once the server is enabled to respond to an OCSP request
921 it does even when not requested, resulting in a stapling non-aware
922 client dropping the TLS connection.
924 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
925 support variable-length bit vectors. No functional change.
927 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
928 The I= interface field on outgoing lines is now after the H= remote
929 host field, same as incoming lines. There is a separate
930 outgoing_interface log selector which allows you to disable the
933 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
934 If not running log_selector +smtp_connection the mainlog would be held
935 open indefinitely after a "too many connections" event, including to a
936 deleted file after a log rotate. Leave the per net connection logging
937 leaving it open for efficiency as that will be quickly detected by the
938 check on the next write.
940 HS/01 Bug 1671: Fix post transport crash.
941 Processing the wait-<transport> messages could crash the delivery
942 process if the message IDs didn't exist for some reason. When
943 using 'split_spool_directory=yes' the construction of the spool
944 file name failed already, exposing the same netto behaviour.
946 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
947 mime_regex ACL conditions.
949 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
950 to DSN fail messages (bounces): remote IP, remote greeting, remote response
951 to HELO, local diagnostic string.
953 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
954 log line to debug. Even when configured with a tls authenticator many
955 client connections are expected to not authenticate in this way, so
956 an authenticate fail is not an error.
958 HS/02 Add the Exim version string to the process info. This way exiwhat
959 gives some more detail about the running daemon.
961 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
962 matter for fast-change records such as DNSBLs.
964 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
965 retry record, even if constant. There may be multiple transports with
966 different interface settings and the retry behaviour needs to be kept
969 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
971 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
973 JH/10 Bug 840: fix log_defer_output option of pipe transport
975 JH/11 Bug 830: use same host for all RCPTS of a message, even under
976 hosts_randomize. This matters a lot when combined with mua_wrapper.
978 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
979 ${quote_pgsql:<string>} operator.
981 JH/13 Bug 1708: avoid misaligned access in cached lookup.
983 JH/14 Change header file name for freeradius-client. Relevant if compiling
984 with Radius support; from the Gentoo tree and checked under Fedora.
986 JH/15 Bug 1712: Introduce $prdr_requested flag variable
988 JH/16 Bug 1714: Permit an empty string as expansion result for transport
989 option transport_filter, meaning no filtering.
991 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
993 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
994 defaults to "*" (all hosts). The variable is now available when not built
995 with TLS, default unset, mainly to enable keeping the testsuite sane.
996 If a server certificate is not supplied (via tls_certificate) an error is
997 logged, and clients will find TLS connections fail on startup. Presumably
998 they will retry in-clear.
999 Packagers of Exim are strongly encouraged to create a server certificate
1000 at installation time.
1002 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1003 with the $config_file variable.
1005 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1006 in transport context, after the attempt, and per-recipient. The latter type
1007 is per host attempted. The event data is the error message, and the errno
1008 information encodes the lookup type (A vs. MX) used for the (first) host,
1009 and the trailing two digits of the smtp 4xx response.
1011 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1012 to write to mainlog (or rejectlog, paniclog) in the window between file
1013 creation and permissions/ownership being changed. Particularly affects
1014 installations where exicyclog is run as root, rather than exim user;
1015 result is that the running daemon panics and dies.
1017 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1019 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1020 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1021 "pri" and "weight". Note that the previous implicit priority given by the
1022 list order is no longer honoured.
1024 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1025 for DKIM processing.
1027 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1028 by defining SUPPORT_SOCKS.
1030 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1031 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1032 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1033 variables are renamed to proxy_{local,external}_{address,port}.
1035 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1036 for a build by defining SUPPORT_I18N
1038 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1039 of the query string, and make ${quote_redis:} do that quoting.
1041 JH/29 Move Events support from Experimental to mainline, enabled by default
1042 and removable for a build by defining DISABLE_EVENT.
1044 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1046 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1047 cached by the daemon.
1049 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1050 by defining LOOKUP_REDIS. The libhiredis library is required.
1052 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1053 keys are given for lookup.
1055 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1056 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1057 only supported when built with TLS support. The PolarSSL SHA routines
1058 are still used when the TLS library is too old for convenient support.
1060 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1061 openssl_options), for security. OpenSSL forces this from version 1.1.0
1062 server-side so match that on older versions.
1064 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1065 allocation for $value could be released as the expansion processing
1066 concluded, but leaving the global pointer active for it.
1068 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1069 and to use the domains and local_parts ACL conditions.
1071 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1072 incorrectly not doubled on cutthrough transmission, hence seen as a
1073 body-termination at the receiving system - resulting in truncated mails.
1074 Commonly the sender saw a TCP-level error, and retransmitted the message
1075 via the normal store-and-forward channel. This could result in duplicates
1076 received - but deduplicating mailstores were liable to retain only the
1077 initial truncated version.
1079 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1081 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1083 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1084 we're in there, support oversigning also; bug 1309.
1086 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1088 HS/04 Add support for keep_environment and add_environment options.
1090 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1091 either intentional arithmetic overflow during PRNG, or testing config-
1094 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1095 delivery resulted in actual delivery. Cancel cutthrough before DATA
1098 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1099 rejects a recipient: pass the reject to the originator.
1101 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1102 Many were false-positives and ignorable, but it's worth fixing the
1105 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1106 for the new environment-manipulation done at startup. Move the routines
1107 from being local to tls.c to being global via the os.c file.
1109 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1110 an extract embedded as result-arg for a map, the first arg for extract
1111 is unavailable so we cannot tell if this is a numbered or keyed
1112 extraction. Accept either.
1118 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1121 JH/02 The smtp transport option "multi_domain" is now expanded.
1123 JH/03 The smtp transport now requests PRDR by default, if the server offers
1126 JH/04 Certificate name checking on server certificates, when exim is a client,
1127 is now done by default. The transport option tls_verify_cert_hostnames
1128 can be used to disable this per-host. The build option
1129 EXPERIMENTAL_CERTNAMES is withdrawn.
1131 JH/05 The value of the tls_verify_certificates smtp transport and main options
1132 default to the word "system" to access the system default CA bundle.
1133 For GnuTLS, only version 3.0.20 or later.
1135 JH/06 Verification of the server certificate for a TLS connection is now tried
1136 (but not required) by default. The verification status is now logged by
1137 default, for both outbound TLS and client-certificate supplying inbound
1140 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1143 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1144 Status Notification (bounce) messages are now MIME format per RFC 3464.
1145 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1146 under the control of the dsn_advertise_hosts option, and routers may
1147 have a dsn_lasthop option.
1149 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1150 default, modifiable by a malware= option. The list separator for
1151 the options can now be changed in the usual way. Bug 68.
1153 JH/10 The smtp_receive_timeout main option is now expanded before use.
1155 JH/11 The incoming_interface log option now also enables logging of the
1156 local interface on delivery outgoing connections.
1158 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1159 if the interface and destination host and port all match.
1161 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1164 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1165 Patch from Andrew Lewis.
1167 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1168 now supports optional time-restrictions, weighting, and priority
1169 modifiers per server. Patch originally by <rommer@active.by>.
1171 JH/16 The spamd_address main option now supports a mixed list of local
1172 and remote servers. Remote servers can be IPv6 addresses, and
1173 specify a port-range.
1175 JH/17 Bug 68: The spamd_address main option now supports an optional
1176 timeout value per server.
1178 JH/18 Bug 1581: Router and transport options headers_add/remove can
1179 now have the list separator specified.
1181 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1184 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1187 JH/21 Support for the A6 type of dns record is withdrawn.
1189 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1190 rather than the verbs used.
1192 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1193 from 255 to 1024 chars.
1195 JH/24 Verification callouts now attempt to use TLS by default.
1197 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1198 are generic router options now. The defaults didn't change.
1200 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1201 Original patch from Alexander Shikoff, worked over by JH.
1203 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1204 files if ZCAT_COMMAND is not executable.
1206 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1208 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1210 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1211 Normally benign, it bites when the pair was led to by a CNAME;
1212 modern usage is to not canonicalize the domain to a CNAME target
1213 (and we were inconsistent anyway for A-only vs AAAA+A).
1215 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1217 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1218 when evaluating $sender_host_dnssec.
1220 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1221 $sender_helo_dnssec variable.
1223 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1225 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1227 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1229 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1230 documented as working, but never had. Support all but $spam_report.
1232 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1233 added for tls authenticator.
1235 HS/03 Add perl_taintmode main config option
1241 TL/01 When running the test suite, the README says that variables such as
1242 no_msglog_check are global and can be placed anywhere in a specific
1243 test's script, however it was observed that placement needed to be near
1244 the beginning for it to behave that way. Changed the runtest perl
1245 script to read through the entire script once to detect and set these
1246 variables, reset to the beginning of the script, and then run through
1247 the script parsing/test process like normal.
1249 TL/02 The BSD's have an arc4random API. One of the functions to induce
1250 adding randomness was arc4random_stir(), but it has been removed in
1251 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1252 function when detected.
1254 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1255 cause callback expansion.
1257 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1258 syntax errors in an expansion can be treated as a string instead of
1259 logging or causing an error, due to the internal use of bool_lax
1260 instead of bool when processing it.
1262 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1263 server certificates when making smtp deliveries.
1265 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1267 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1269 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1271 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1272 Merged patch from Sebastian Wiedenroth.
1274 JH/05 Fix results-pipe from transport process. Several recipients, combined
1275 with certificate use, exposed issues where response data items split
1276 over buffer boundaries were not parsed properly. This eventually
1277 resulted in duplicates being sent. This issue only became common enough
1278 to notice due to the introduction of connection certificate information,
1279 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1281 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1282 size buffer was used, resulting in syntax errors when an expansion
1285 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1286 version 3.3.6 or later.
1288 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1289 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1290 both become "event_action", the variables become $event_name, $event_data
1291 and $event_defer_errno. There is a new variable $verify_mode, usable in
1292 routers, transports and related events. The tls:cert event is now also
1293 raised for inbound connections, if the main configuration event_action
1296 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1297 early OCSP support, but no stapling (appears to be less than 1.0.0).
1299 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1300 server certificate names available under the smtp transport option
1301 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1304 JH/10 Time-related extraction expansions from certificates now use the main
1305 option "timezone" setting for output formatting, and are consistent
1306 between OpenSSL and GnuTLS compilations. Bug 1541.
1308 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1309 encoded parameter in the incoming message. Bug 1558.
1311 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1312 include certificate info, eximon was claiming there were spoolfile
1315 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1317 JH/14 Log delivery-related information more consistently, using the sequence
1318 "H=<name> [<ip>]" wherever possible.
1320 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1321 are problematic for Debian distribution, omit them from the release
1324 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1326 JH/16 Fix string representation of time values on 64bit time_t architectures.
1329 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1330 output list separator was used.
1335 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1336 checkers that were complaining about end of non-void function with no
1339 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1340 This was a regression introduced in 4.83 by another bugfix.
1342 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1344 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1345 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1351 TF/01 Correctly close the server side of TLS when forking for delivery.
1353 When a message was received over SMTP with TLS, Exim failed to clear up
1354 the incoming connection properly after forking off the child process to
1355 deliver the message. In some situations the subsequent outgoing
1356 delivery connection happened to have the same fd number as the incoming
1357 connection previously had. Exim would try to use TLS and fail, logging
1358 a "Bad file descriptor" error.
1360 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1361 utilities have not been installed.
1363 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1364 temporary space as the ACL may create new global variables.
1366 TL/01 LDAP support uses per connection or global context settings, depending
1367 upon the detected version of the libraries at build time.
1369 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1370 to extract and use the src ip:port in logging and expansions as if it
1371 were a direct connection from the outside internet. PPv2 support was
1372 updated based on HAProxy spec change in May 2014.
1374 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1376 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1377 Properly escape header and check for NULL return.
1379 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1382 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1384 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1385 characters in header names, implemented as a verify condition.
1386 Contributed by Michael Fischer v. Mollard.
1388 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1389 results permerror and temperror. Previous values are deprecated but
1390 still accepted. In a future release, err_perm and err_temp will be
1391 completely removed, which will be a backward incompatibility if the
1392 ACL tests for either of these two old results. Patch contributed by
1393 user bes-internal on the mailing list.
1395 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1397 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1398 selectors, in both main and reject logs.
1400 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1403 JH/07 Add malware type "sock" for talking to simple daemon.
1405 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1407 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1408 routers/transports under cutthrough routing.
1410 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1411 numbers. Touch up "bool" conditional to keep the same definition.
1413 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1415 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1417 JH/12 Expand items in router/transport headers_add or headers_remove lists
1418 individually rather than the list as a whole. Bug 1452.
1420 Required for reasonable handling of multiple headers_ options when
1421 they may be empty; requires that headers_remove items with embedded
1422 colons must have them doubled (or the list-separator changed).
1424 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1425 view the policy declared in the DMARC record. Currently, $dmarc_status
1426 is a combined value of both the record presence and the result of the
1429 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1431 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1432 dnslookup router and the smtp transport (applying to the forward
1435 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1436 of ldap servers used for a specific lookup. Patch provided by Heiko
1439 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1440 New variable $lookup_dnssec_authenticated for observability.
1442 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1443 Patch submitted by Lars Timman.
1445 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1447 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1448 Requires trusted mode and valid format message id, aborts otherwise.
1449 Patch contributed by Heiko Schlichting.
1451 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1452 certextract with support for various fields. Bug 1358.
1454 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1455 is requested by default, modifiable by smtp transport option
1458 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1459 operate on certificate variables to give certificate fingerprints
1460 Also new ${sha256:cert_variable}.
1462 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1464 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1465 Christian Aistleitner.
1467 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1469 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1470 file. Patch from Wolfgang Breyha.
1472 JH/25 Expand the coverage of the delivery $host and $host_address to
1473 client authenticators run in verify callout. Bug 1476.
1475 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1476 align with daemon_smtp_ports. Bug 72.
1478 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1479 support and error reporting did not work properly.
1481 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1482 and is readable. Patch from Andrew Colin Kissa.
1484 TL/14 Enhance documentation of ${run expansion and how it parses the
1485 commandline after expansion, particularly in the case when an
1486 unquoted variable expansion results in an empty value.
1488 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1490 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1491 by renaming away from it. Addresses GH issue 15, reported by
1494 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1496 TL/15 SECURITY: prevent double expansion in math comparison functions
1497 (can expand unsanitized data). Not remotely exploitable.
1504 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1506 PP/02 Make -n do something, by making it not do something.
1507 When combined with -bP, the name of an option is not output.
1509 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1512 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1513 $sender_host_name and config options to manage this, and basic check
1516 PP/05 DSCP support for outbound connections and control modifier for inbound.
1518 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1519 (Only plugin which currently uses this is kerberos4, which nobody should
1520 be using, but we should make it available and other future plugins might
1521 conceivably use it, even though it would break NAT; stuff *should* be
1522 using channel bindings instead).
1524 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1525 name; added for Sendmail compatibility; requires admin caller.
1526 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1527 just ignore it); requires trusted caller.
1528 Also parse but ignore: -Ac -Am -X<logfile>
1531 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1533 TL/02 Add +smtp_confirmation as a default logging option.
1535 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1536 Patch by Magnus Holmgren from 2007-02-20.
1538 TL/04 Bugzilla 1281 - Spec typo.
1539 Bugzilla 1283 - Spec typo.
1540 Bugzilla 1290 - Spec grammar fixes.
1542 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1544 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1546 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1547 mailing list by by Dmitry Isaikin.
1549 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1551 JH/02 Support "G" suffix to numbers in ${if comparisons.
1553 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1555 NM/01 Bugzilla 1197 - Spec typo
1556 Bugzilla 1196 - Spec examples corrections
1558 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1560 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1561 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1564 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1565 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1567 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1568 "acl {{name}{arg}...}", and optional args on acl condition
1571 JH/05 Permit multiple router/transport headers_add/remove lines.
1573 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1575 JH/07 Avoid using a waiting database for a single-message-only transport.
1576 Performance patch from Paul Fisher. Bugzilla 1262.
1578 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1581 JH/09 Add $headers_added variable, with content from use of ACL modifier
1582 add_header (but not yet added to the message). Bugzilla 199.
1584 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1585 Pulled from Bugzilla 817 by Wolfgang Breyha.
1587 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1589 (nb: this is the same fix as in Exim 4.80.1)
1591 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1594 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1597 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1599 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1600 advertise SMTP AUTH mechanism to us, instead of a generic
1601 protocol violation error. Also, make Exim more robust to bad
1602 data from the Dovecot auth socket.
1604 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1606 When a queue runner is handling a message, Exim first routes the
1607 recipient addresses, during which it prunes them based on the retry
1608 hints database. After that it attempts to deliver the message to
1609 any remaining recipients. It then updates the hints database using
1612 So if a recipient address works intermittently, it can get repeatedly
1613 deferred at routing time. The retry hints record remains fresh so the
1614 address never reaches the final cutoff time.
1616 This is a fairly common occurrence when a user is bumping up against
1617 their storage quota. Exim had some logic in its local delivery code
1618 to deal with this. However it did not apply to per-recipient defers
1619 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1621 This change adds a proper retry rule check during routing so that the
1622 final cutoff time is checked against the message's age. We only do
1623 this check if there is an address retry record and there is not a
1624 domain retry record; this implies that previous attempts to handle
1625 the address had the retry_use_local_parts option turned on. We use
1626 this as an approximation for the destination being like a local
1627 delivery, as in LMTP.
1629 I suspect this new check makes the old local delivery cutoff check
1630 redundant, but I have not verified this so I left the code in place.
1632 TF/02 Correct gecos expansion when From: is a prefix of the username.
1634 Test 0254 submits a message to Exim with the header
1638 When I ran the test suite under the user fanf2, Exim expanded
1639 the header to contain my full name, whereas it should have added
1640 a Resent-Sender: header. It erroneously treats any prefix of the
1641 username as equal to the username.
1643 This change corrects that bug.
1645 GF/01 DCC debug and logging tidyup
1646 Error conditions log to paniclog rather than rejectlog.
1647 Debug lines prefixed by "DCC: " to remove any ambiguity.
1649 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1651 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1652 Bug spotted by Jeremy Harris; was flawed since initial commit.
1653 Would have resulted in OCSP responses post-SNI triggering an Exim
1654 NULL dereference and crash.
1656 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1658 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1659 Bug detection, analysis and fix by Samuel Thibault.
1660 Bugzilla 1331, Debian bug #698092.
1662 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1664 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1665 Server implementation by Todd Lyons, client by JH.
1666 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1667 config variable "prdr_enable" controls whether the server
1668 advertises the facility. If the client requests PRDR a new
1669 acl_data_smtp_prdr ACL is called once for each recipient, after
1670 the body content is received and before the acl_smtp_data ACL.
1671 The client is controlled by both of: a hosts_try_prdr option
1672 on the smtp transport, and the server advertisement.
1673 Default client logging of deliveries and rejections involving
1674 PRDR are flagged with the string "PRDR".
1676 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1677 fclose(). Diagnosis by Todd Lyons.
1679 PP/17 Update configure.default to handle IPv6 localhost better.
1680 Patch by Alain Williams (plus minor tweaks).
1683 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1684 This is now consistent with GnuTLS, and is now documented: the
1685 previous undocumented portable approach to treating the option as
1686 unset was to force an expansion failure. That still works, and
1687 an empty string is now equivalent.
1689 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1690 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1691 not performing validation itself.
1693 PP/20 Added force_command boolean option to pipe transport.
1694 Patch from Nick Koston, of cPanel Inc.
1696 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1699 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1701 PP/21 Fix eximon continuous updating with timestamped log-files.
1702 Broken in a format-string cleanup in 4.80, missed when I repaired the
1703 other false fix of the same issue.
1704 Report and fix from Heiko Schlichting.
1707 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1708 Report from Prashanth Katuri.
1710 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1711 It's SecureTransport, so affects any MacOS clients which use the
1712 system-integrated TLS libraries, including email clients.
1714 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1715 using a MIME ACL for non-SMTP local injection.
1716 Report and assistance in diagnosis by Warren Baker.
1718 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1720 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1722 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1723 last id that failed so it may be referenced in subsequent ACL's.
1725 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1728 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1729 ldap library initialization, allowing self-signed CA's to be
1730 used. Also properly sets require_cert option later in code by
1731 using NULL (global ldap config) instead of ldap handle (per
1732 session). Bug diagnosis and testing by alxgomz.
1734 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1735 the src/util/ subdirectory.
1737 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1738 renamed to Transport Post Delivery Action by Jeremy Harris, as
1741 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1742 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1743 redis_servers = needs to be configured which will be used by the redis
1744 lookup. Patch from Warren Baker, of The Packet Hub.
1746 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1748 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1749 hostname or reverse DNS when processing a host list. Used suggestions
1750 from multiple comments on this bug.
1752 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1754 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1755 Missed a few lines, added it to make the runtest require no keyboard
1758 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1759 contains upper case chars. Make router use caseful_local_part.
1761 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1762 support when GnuTLS has been built with p11-kit.
1768 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1770 This, or similar/improved, will also be change PP/11 of 4.82.
1776 PP/01 Handle short writes when writing local log-files.
1777 In practice, only affects FreeBSD (8 onwards).
1778 Bugzilla 1053, with thanks to Dmitry Isaikin.
1780 NM/01 Bugzilla 949 - Documentation tweak
1782 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1785 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1787 PP/02 Implemented gsasl authenticator.
1789 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1791 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1792 `pkg-config foo` for cflags/libs.
1794 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1795 with rest of GSASL and with heimdal_gssapi.
1797 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1798 `pkg-config foo` for cflags/libs for the TLS implementation.
1800 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1801 properties get this fed in as external SSF. A number of robustness
1802 and debugging improvements to the cyrus_sasl authenticator.
1804 PP/08 cyrus_sasl server now expands the server_realm option.
1806 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1807 Patch by Jeremy Harris.
1809 PP/10 Added dbmjz lookup type.
1811 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1813 PP/12 MAIL args handles TAB as well as SP, for better interop with
1814 non-compliant senders.
1815 Analysis and variant patch by Todd Lyons.
1817 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1818 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1819 Patch from Dirk Mueller <dmueller@suse.com>
1821 PP/13 tls_peerdn now print-escaped for spool files.
1822 Observed some $tls_peerdn in wild which contained \n, which resulted
1823 in spool file corruption.
1825 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1826 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1827 or write after TLS renegotiation, which otherwise led to messages
1830 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1831 as a tracking header (ie: a signed header comes before the signature).
1832 Patch from Wolfgang Breyha.
1834 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1835 comma-sep list; embedded commas doubled.
1837 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1839 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1841 Report and patch from Dmitry Banschikov.
1843 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1844 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1845 failures. We appear to now support TLS1.1+ with Exim.
1847 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1848 lets Exim select keys and certificates based upon TLS SNI from client.
1849 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1850 before an outbound SMTP session. New log_selector, +tls_sni.
1852 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1853 NULL dereference. Report and patch from Alun Jones.
1855 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1856 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1857 Not seeing resolver debug output on NetBSD, but suspect this is a
1858 resolver implementation change.
1860 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1861 Left warnings. Added "eximon gdb" invocation mode.
1863 PP/21 Defaulting "accept_8bitmime" to true, not false.
1865 PP/22 Added -bw for inetd wait mode support.
1867 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1868 locate the relevant includes and libraries. Made this the default.
1870 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1871 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1873 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1874 This may cause build issues on older platforms.
1876 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1877 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1878 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1879 Added SNI support via GnuTLS too.
1880 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1882 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1884 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1885 Applied second patch from Janne, implementing suggestion to default
1886 multiple-strings-in-record handling to match SPF spec.
1888 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1890 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1891 read-only, out of scope).
1892 Patch from Wolfgang Breyha, report from Stuart Northfield.
1894 PP/29 Fix three issues highlighted by clang analyser static analysis.
1895 Only crash-plausible issue would require the Cambridge-specific
1896 iplookup router and a misconfiguration.
1897 Report from Marcin Mirosław.
1899 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1901 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1902 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1903 As part of this, removing so much warning spew let me fix some minor
1904 real issues in debug logging.
1906 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1907 assignment on my part. Fixed.
1909 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1910 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1911 Janne Snabb (who went above and beyond: thank you).
1913 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1914 string otherwise requires a connection and a bunch more work and it's
1915 relatively easy to get wrong. Should also expose TLS library linkage
1918 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1919 64-bit ${eval} (JH/03).
1921 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1922 GNU libc to support some of the 64-bit stuff, should not lead to
1923 conflicts. Defined before os.h is pulled in, so if a given platform
1924 needs to override this, it can.
1926 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1927 protection layer was required, which is not implemented.
1928 Bugzilla 1254, patch from Wolfgang Breyha.
1930 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1931 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1932 tls_dhparam take prime identifiers. Also unbreak combination of
1933 OpenSSL+DH_params+TLSSNI.
1935 PP/39 Disable SSLv2 by default in OpenSSL support.
1941 PP/01 Solaris build fix for Oracle's LDAP libraries.
1942 Bugzilla 1109, patch from Stephen Usher.
1944 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1946 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1949 TF/02 Fix a couple more cases where we did not log the error message
1950 when unlink() failed. See also change 4.74-TF/03.
1952 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1953 lock up or crash if it happened to be inside a call to libc when it
1954 got a SIGUSR1 from exiwhat.
1956 The SIGUSR1 handler appends the current process status to the process
1957 log which is later printed by exiwhat. It used to use the general
1958 purpose logging code to do this, but several functions it calls are
1959 not safe for signals.
1961 The new output code in the SIGUSR1 handler is specific to the process
1962 log, and simple enough that it's easy to inspect for signal safety.
1963 Removing some special cases also simplifies the general logging code.
1964 Removing the spurious timestamps from the process log simplifies
1967 TF/04 Improved ratelimit ACL condition.
1969 The /noupdate option has been deprecated in favour of /readonly which
1970 has clearer semantics. The /leaky, /strict, and /readonly update modes
1971 are mutually exclusive. The update mode is no longer included in the
1972 database key; it just determines when the database is updated. (This
1973 means that when you upgrade Exim will forget old rate measurements.)
1975 Exim now checks that the per_* options are used with an update mode that
1976 makes sense for the current ACL. For example, when Exim is processing a
1977 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1978 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1979 must specify per_mail/readonly. If you omit the update mode it defaults to
1980 /leaky where that makes sense (as before) or /readonly where required.
1982 The /noupdate option is now undocumented but still supported for
1983 backwards compatibility. It is equivalent to /readonly except that in
1984 ACLs where /readonly is required you may specify /leaky/noupdate or
1985 /strict/noupdate which are treated the same as /readonly.
1987 A useful new feature is the /count= option. This is a generalization
1988 of the per_byte option, so that you can measure the throughput of other
1989 aggregate values. For example, the per_byte option is now equivalent
1990 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1992 The per_rcpt option has been generalized using the /count= mechanism
1993 (though it's more complicated than the per_byte equivalence). When it is
1994 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1995 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1996 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1997 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1998 Note that using per_rcpt with a non-readonly update mode in more than
1999 one ACL will cause the recipients to be double-counted. (The per_mail
2000 and per_byte options don't have this problem.)
2002 The handling of very low rates has changed slightly. If the computed rate
2003 is less than the event's count (usually one) then this event is the first
2004 after a long gap. In this case the rate is set to the same as this event's
2005 count, so that the first message of a spam run is counted properly.
2007 The major new feature is a mechanism for counting the rate of unique
2008 events. The new per_addr option counts the number of different
2009 recipients that someone has sent messages to in the last time period. It
2010 behaves like per_rcpt if all the recipient addresses are different, but
2011 duplicate recipient addresses do not increase the measured rate. Like
2012 the /count= option this is a general mechanism, so the per_addr option
2013 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2014 example, measure the rate that a client uses different sender addresses
2015 with the options per_mail/unique=$sender_address. There are further
2016 details in the main documentation.
2018 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2020 TF/06 Removed a few PCRE remnants.
2022 TF/07 Automatically extract Exim's version number from tags in the git
2023 repository when doing development or release builds.
2025 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2026 Bugzilla 879. Patch from Paul Fisher.
2028 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2029 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2032 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2034 PP/05 Variable $av_failed, true if the AV scanner deferred.
2035 Bugzilla 1078. Patch from John Horne.
2037 PP/06 Stop make process more reliably on build failure.
2038 Bugzilla 1087. Patch from Heiko Schlittermann.
2040 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2041 Bugzilla 1089. Patch from Heiko Schlittermann.
2043 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2044 Bugzilla 1131. Patch from Holger Weiß.
2046 PP/09 Handle IPv6 addresses with SPF.
2047 Bugzilla 860. Patch from Wolfgang Breyha.
2049 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2051 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2054 PP/11 match_* no longer expand right-hand-side by default.
2055 New compile-time build option, EXPAND_LISTMATCH_RHS.
2056 New expansion conditions, "inlist", "inlisti".
2058 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2060 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2062 PP/14 fix log_write() format string regression from TF/03.
2063 Bugzilla 1152. Patch from Dmitry Isaikin.
2069 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2071 PP/02 Harmonised TLS library version reporting; only show if debugging.
2072 Layout now matches that introduced for other libraries in 4.74 PP/03.
2074 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2076 PP/04 New "dns_use_edns0" global option.
2078 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2081 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2082 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2084 TK/01 Updated PolarSSL code to 0.14.2.
2085 Bugzilla 1097. Patch from Andreas Metzler.
2087 PP/07 Catch divide-by-zero in ${eval:...}.
2088 Fixes bugzilla 1102.
2090 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2093 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2094 format-string attack -- SECURITY: remote arbitrary code execution.
2096 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2097 time unintentionally subject to list matching rules, letting the header
2098 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2099 arbitrary string expansion). This allowed for information disclosure.
2101 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2102 INT_MIN/-1 -- value coerced to INT_MAX.
2108 NM/01 Workaround for PCRE version dependency in version reporting
2111 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2112 This fixes portability to compilers other than gcc, notably
2113 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2115 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2116 makefiles for portability to HP-UX and POSIX correctness.
2118 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2119 Also via indented variable definition in the Makefile.
2120 (Debugging by Oliver Heesakkers).
2122 PP/02 Restore caching of spamd results with expanded spamd_address.
2123 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2125 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2126 Improves build reliability. Fix from: Frank Elsner
2128 NM/02 Fix wide character breakage in the rfc2047 coding
2129 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2131 NM/03 Allow underscore in dnslist lookups
2132 Fixes bug 1026. Patch from Graeme Fowler
2134 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2135 Code patches from Adam Ciarcinski of NetBSD.
2137 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2140 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2141 is logged, to avoid truncation. Patch from John Horne.
2143 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2144 Patch from Jakob Hirsch.
2146 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2147 SQL string expansion failure details.
2148 Patch from Andrey Oktyabrski.
2150 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2151 Patch from Simon Arlott.
2153 PP/09 New lookups functionality failed to compile on old gcc which rejects
2154 extern declarations in function scope.
2155 Patch from Oliver Fleischmann
2157 PP/10 Use sig_atomic_t for flags set from signal handlers.
2158 Check getgroups() return and improve debugging.
2159 Fixed developed for diagnosis in bug 927 (which turned out to be
2162 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2163 Patch from Mark Zealey.
2165 PP/12 Bugzilla 1056: Improved spamd server selection.
2166 Patch from Mark Zealey.
2168 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2169 Based on patch from Heiko Schlittermann.
2171 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2172 Patch from Uwe Doering, sign-off by Michael Haardt.
2174 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2175 variable declaration deep within a block. Bug and patch from
2178 PP/15 lookups-Makefile IRIX compatibility coercion.
2180 PP/16 Make DISABLE_DKIM build knob functional.
2182 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2183 Patch by Simon Arlott
2185 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2186 variable argument macros. Our copy now differs from upstream.
2192 TF/01 Failure to get a lock on a hints database can have serious
2193 consequences so log it to the panic log.
2195 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2196 controlled using the smtp_confirmation log selector.
2198 TF/03 Include the error message when we fail to unlink a spool file.
2200 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2201 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2202 for maintaining out-of-tree patches for some time.
2204 PP/01 Bugzilla 139: Documentation and portability issues.
2205 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2206 Handle per-OS dynamic-module compilation flags.
2208 PP/02 Let /dev/null have normal permissions.
2209 The 4.73 fixes were a little too stringent and complained about the
2210 permissions on /dev/null. Exempt it from some checks.
2211 Reported by Andreas M. Kirchwitz.
2213 PP/03 Report version information for many libraries, including
2214 Exim version information for dynamically loaded libraries. Created
2215 version.h, now support a version extension string for distributors
2216 who patch heavily. Dynamic module ABI change.
2218 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2219 privilege escalation vulnerability whereby the Exim run-time user
2220 can cause root to append content of the attacker's choosing to
2223 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2226 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2227 If dropping privileges for untrusted macros, we disabled normal logging
2228 on the basis that it would fail; for the Exim run-time user, this is not
2229 the case, and it resulted in successful deliveries going unlogged.
2230 Fixed. Reported by Andreas Metzler.
2236 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2237 only prepend for the Resent-* case. Fixes regression introduced in
2238 Exim 4.70 by NM/22 for Bugzilla 607.
2240 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2241 increasing numbers of administrators be bitten by this.
2243 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2245 PP/03 Bugzilla 994: added openssl_options main configuration option.
2247 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2249 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2251 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2253 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2254 without a peer certificate, leading to a segfault because of an
2255 assumption that peers always have certificates. Be a little more
2256 paranoid. Problem reported by Martin Tscholak.
2258 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2259 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2260 NB: ClamAV planning to remove STREAM in "middle of 2010".
2261 CL also introduces -bmalware, various -d+acl logging additions and
2262 more caution in buffer sizes.
2264 PP/09 Implemented reverse_ip expansion operator.
2266 PP/10 Bugzilla 937: provide a "debug" ACL control.
2268 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2270 PP/12 Bugzilla 973: Implement --version.
2272 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2274 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2276 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2278 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2279 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2280 ignore trailing whitespace.
2282 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2284 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2287 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2288 Notification from Dr Andrew Aitchison.
2290 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2291 ExtendedDetectionInfo response format.
2292 Notification from John Horne.
2294 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2297 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2298 XSL and documented dependency on system catalogs, with examples of how
2301 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2304 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2305 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2306 configuration file which is writeable by the Exim user or group.
2308 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2309 of configuration files to cover files specified with the -C option if
2310 they are going to be used with root privileges, not just the default
2313 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2314 option (effectively making it always true).
2316 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2317 files to be used while preserving root privileges.
2319 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2320 that rogue child processes cannot use them.
2322 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2323 run-time user, instead of root.
2325 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2326 Exim run-time user without dropping privileges.
2328 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2329 result string, instead of calling string_vformat() twice with the same
2332 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2333 for other users. Others should always drop root privileges if they use
2334 -C on the command line, even for a whitelisted configure file.
2336 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2338 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2344 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2345 $data_path, and $header_path variables; fixed documentation bugs and
2348 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2349 exipick to access non-standard spools, including the "frozen" queue
2352 NM/01 Bugzilla 965: Support mysql stored procedures.
2353 Patch from Alain Williams
2355 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2357 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2358 Patch from Andreas Metzler
2360 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2361 Patch from Kirill Miazine
2363 NM/05 Bugzilla 671: Added umask to procmail example.
2365 JJ/03 installed exipick 20100323.0, fixing doc bug
2367 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2368 directory. Notification and patch from Dan Rosenberg.
2370 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2372 TK/02 Improve log output when DKIM signing operation fails.
2374 MH/01 Treat the transport option dkim_domain as a colon separated
2375 list, not as a single string, and sign the message with each element,
2376 omitting multiple occurences of the same signer.
2378 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2379 Bugzilla 985, 986. Patch by Simon Arlott
2381 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2382 Patch by Simon Arlott
2384 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2385 MBX locking. Notification from Dan Rosenberg.
2391 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2393 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2395 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2397 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2399 NM/04 Bugzilla 915: Flag broken perl installation during build.
2405 TK/01 Added patch by Johannes Berg that expands the main option
2406 "spamd_address" if it starts with a dollar sign.
2408 TK/02 Write list of recipients to X-Envelope-Sender header when building
2409 the mbox-format spool file for content scanning (suggested by Jakob
2412 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2413 (http://www.dcc-servers.net/) support via dccifd. Activated by
2414 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2416 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2417 by Mark Daniel Reidel <mr@df.eu>.
2419 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2420 When building exim an external PCRE library is now needed -
2421 PCRE is a system library on the majority of modern systems.
2422 See entry on PCRE_LIBS in EDITME file.
2424 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2425 conversation. Added nologin parameter to request.
2426 Patch contributed by Kirill Miazine.
2428 TF/01 Do not log submission mode rewrites if they do not change the address.
2430 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2432 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2433 log files in place. Contributed by Roberto Lima.
2435 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2437 TF/03 Bugzilla 615: When checking the local_parts router precondition
2438 after a local_part_suffix or local_part_prefix option, Exim now
2439 does not use the address's named list lookup cache, since this
2440 contains cached lookups for the whole local part.
2442 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2443 Robert Millan. Documentation is in experimental-spec.txt.
2445 TF/04 Bugzilla 668: Fix parallel build (make -j).
2447 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2449 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2450 Patch provided by Jan Srzednicki.
2452 TF/05 Leading white space used to be stripped from $spam_report which
2453 wrecked the formatting. Now it is preserved.
2455 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2456 that they are available at delivery time.
2458 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2460 TF/08 TLS error reporting now respects the incoming_interface and
2461 incoming_port log selectors.
2463 TF/09 Produce a more useful error message if an SMTP transport's hosts
2464 setting expands to an empty string.
2466 NM/06 Bugzilla 744: EXPN did not work under TLS.
2467 Patch provided by Phil Pennock.
2469 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2470 Patch provided by Richard Godbee.
2472 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2473 acl_smtp_notquit, added index entry.
2475 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2476 Patch provided by Eugene Bujak.
2478 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2479 accept(). Patch provided by Maxim Dounin.
2481 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2482 Patch provided by Phil Pennock.
2484 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2486 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2487 Patch provided by Brad "anomie" Jorsch.
2489 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2490 Patch provided by Dean Brooks.
2492 TK/05 Add native DKIM support (does not depend on external libraries).
2494 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2495 Patch provided by Graeme Fowler.
2497 NM/16 Bugzilla 851: Documentation example syntax fix.
2499 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2501 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2504 NM/19 Bugzilla 745: TLS version reporting.
2505 Patch provided by Phil Pennock.
2507 NM/20 Bugzilla 167: bool: condition support.
2508 Patch provided by Phil Pennock.
2510 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2511 clients. Patch provided by Phil Pennock.
2513 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2514 Patch provided by Brad "anomie" Jorsch.
2516 NM/23 Bugzilla 687: Fix misparses in eximstats.
2517 Patch provided by Heiko Schlittermann.
2519 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2520 Patch provided by Heiko Schlittermann.
2522 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2523 plus update to original patch.
2525 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2527 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2528 Patch provided by David Brownlee.
2530 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2532 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2534 NM/30 Bugzilla 888: TLS documentation bugfixes.
2536 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2538 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2539 Unlike the original bugzilla I have changed all shell scripts in src tree.
2541 NM/33 Bugzilla 898: Transport filter timeout fix.
2542 Patch by Todd Rinaldo.
2544 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2545 Patch by Serge Demonchaux.
2547 NM/35 Bugzilla 39: Base64 decode bug fixes.
2548 Patch by Jakob Hirsch.
2550 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2552 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2554 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2556 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2562 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2563 ALT-N's libdkim that I have put here:
2564 http://duncanthrax.net/exim-experimental/
2566 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2567 were called 'true' and it seems that C99 defines that as a reserved
2568 keyword to be used with 'bool' variable types. That means you could
2569 not include C99-style headers which use bools without triggering
2570 build errors in sieve.c.
2572 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2573 as mailq or other aliases. Changed the --help handling significantly
2574 to do whats expected. exim_usage() emits usage/help information.
2576 SC/01 Added the -bylocaldomain option to eximstats.
2578 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2580 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2582 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2588 PH/01 Another patch from the Sieve maintainer.
2590 PH/02 When an IPv6 address is converted to a string for single-key lookup
2591 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2592 dots are used instead of colons so that keys in lsearch files need not
2593 contain colons. This was done some time before quoting was made available
2594 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2595 (notated using the quote facility) so as to distinguish them from IPv4
2596 keys. This meant that lookups for IP addresses in host lists did not work
2597 for iplsearch lookups.
2599 This has been fixed by arranging for IPv6 addresses to be expressed with
2600 colons if the lookup type is iplsearch. This is not incompatible, because
2601 previously such lookups could never work.
2603 The situation is now rather anomalous, since one *can* have colons in
2604 ordinary lsearch keys. However, making the change in all cases is
2605 incompatible and would probably break a number of configurations.
2607 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2610 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2611 conversion specification without a maximum field width, thereby enabling
2612 a rogue spamd server to cause a buffer overflow. While nobody in their
2613 right mind would setup Exim to query an untrusted spamd server, an
2614 attacker that gains access to a server running spamd could potentially
2615 exploit this vulnerability to run arbitrary code as the Exim user.
2617 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2618 $primary_hostname instead of what libspf2 thinks the hosts name is.
2620 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2621 a directory entry by the name of the lookup key. Previously, if a
2622 symlink pointed to a non-existing file or a file in a directory that
2623 Exim lacked permissions to read, a lookup for a key matching that
2624 symlink would fail. Now it is enough that a matching directory entry
2625 exists, symlink or not. (Bugzilla 503.)
2627 PH/03 The body_linecount and body_zerocount variables are now exported in the
2630 PH/04 Added the $dnslist_matched variable.
2632 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2633 This means they are set thereafter only if the connection becomes
2636 PH/06 Added the client_condition to authenticators so that some can be skipped
2637 by clients under certain conditions.
2639 PH/07 The error message for a badly-placed control=no_multiline_responses left
2640 "_responses" off the end of the name.
2642 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2644 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2645 (without spaces) instead of just copying the configuration text.
2647 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2649 PH/11 Added $max_received_linelength.
2651 PH/12 Added +ignore_defer and +include_defer to host lists.
2653 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2654 way in which PCRE > 7.0 is built.
2656 PH/14 Implemented queue_only_load_latch.
2658 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2659 MAIL command. The effect was to mangle the value on 64-bit systems.
2661 PH/16 Another patch from the Sieve maintainer.
2663 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2665 PH/18 If a system quota error occurred while trying to create the file for
2666 a maildir delivery, the message "Mailbox is full" was not appended to the
2667 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2668 only to a quota excession during the actual writing of the file.
2670 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2671 characters?) which causes problems in log lines. The DN values are now
2672 passed through string_printing() before being added to log lines.
2674 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2675 and InterBase are left for another time.)
2677 PH/21 Added message_body_newlines option.
2679 PH/22 Guard against possible overflow in moan_check_errorcopy().
2681 PH/23 POSIX allows open() to be a macro; guard against that.
2683 PH/24 If the recipient of an error message contained an @ in the local part
2684 (suitably quoted, of course), incorrect values were put in $domain and
2685 $local_part during the evaluation of errors_copy.
2691 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2692 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2695 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2696 issue a MAIL command.
2698 PH/02 In an ACL statement such as
2700 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2702 if a client was not listed at all, or was listed with a value other than
2703 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2704 the condition was not true (as it should be), so access was not denied.
2705 The bug was that the ! inversion was incorrectly passed on to the second
2706 item. This has been fixed.
2708 PH/03 Added additional dnslists conditions == and =& which are different from
2709 = and & when the dns lookup returns more than one IP address.
2711 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2712 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2714 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2715 FSYNC, which compiles an option called disable_fsync that allows for
2716 bypassing fsync(). The documentation is heavily laced with warnings.
2718 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2720 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2721 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2722 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2723 including adding "make clean"; (3) Added -fPIC when compiling the test
2724 dynamically loaded module, to get rid of a warning.
2726 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2727 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2728 = 0s. The bug is otherwise harmless.
2730 PH/07 There was a bug in the dovecot authenticator such that the value of
2731 $auth1 could be overwritten, and so not correctly preserved, after a
2732 successful authentication. This usually meant that the value preserved by
2733 the server_setid option was incorrect.
2735 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2737 PH/09 Installed PCRE release 7.0.
2739 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2740 run for batched SMTP input. It is now run at the start of every message
2741 in the batch. While fixing this I discovered that the process information
2742 (output by running exiwhat) was not always getting set for -bs and -bS
2743 input. This is fixed, and it now also says "batched" for BSMTP.
2745 PH/11 Added control=no_pipelining.
2747 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2748 patch, slightly modified), and move the expansion of helo_data till after
2749 the connection is made in the smtp transport (so it can use these
2752 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2754 PH/14 Added log_selector = +pid.
2756 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2758 PH/16 Add ${if forany and ${if forall.
2760 PH/17 Added dsn_from option to vary the From: line in DSNs.
2762 PH/18 Flush SMTP output before performing a callout, unless control =
2763 no_callout_flush is set.
2765 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2766 was true (the default) a successful delivery failed to delete the retry
2767 item, thus causing premature timeout of the address. The bug is now
2770 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2772 PH/21 Long custom messages for fakedefer and fakereject are now split up
2773 into multiline responses in the same way that messages for "deny" and
2774 other ACL rejections are.
2776 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2777 with slight modification.
2779 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2780 draft, changing the syntax and factoring some duplicate code".
2782 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2783 for deliveries of the second and subsequent messages over the same SMTP
2786 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2787 ${reduce, with only minor "tidies".
2789 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2791 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2792 expansion side effects.
2794 PH/27 When a message times out after an over-quota error from an Exim-imposed
2795 quota, the bounce message says "mailbox is full". This message was not
2796 being given when it was a system quota that was exceeded. It now should
2799 MH/03 Made $recipients available in local_scan(). local_scan() already has
2800 better access to the recipient list through recipients_list[], but
2801 $recipients can be useful in postmaster-provided expansion strings.
2803 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2804 in the case of a MAIL command with additional options following the
2805 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2806 were accidentally chopped off.
2808 PH/29 SMTP synchronization checks are implemented when a command is read -
2809 there is a check that no more input is waiting when there shouldn't be
2810 any. However, for some commands, a delay in an ACL can mean that it is
2811 some time before the response is written. In this time, more input might
2812 arrive, invalidly. So now there are extra checks after an ACL has run for
2813 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2814 pipelining has not been advertised.
2816 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2818 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2819 returned in the SMTP response when smtp_return_error_details was false.
2820 This has been fixed.
2822 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2823 instead of the C I/O that was originally supplied, because problems were
2824 reported on Solaris.
2826 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2827 Exim which did not show up earlier: it was assuming that a call to
2828 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2829 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2830 was a macro that became an assignment, so it seemed to work. This has
2831 changed to a proper function call with a void return, hence the compile
2832 error. Exim's code has been fixed.
2834 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2837 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2839 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2841 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2842 because it turns out to be too big or there is a timeout) there is no
2843 "Completed" line in the log. When some messages of this type were
2844 selected by exigrep, they were listed as "not completed". Others were
2845 picked up by some special patterns. I have improved the selection
2846 criteria to be more general.
2848 PH/38 The host_find_failed option in the manualroute router can now be set
2849 to "ignore", to completely ignore a host whose IP address cannot be
2850 found. If all hosts are ignored, the behaviour is controlled by the new
2851 host_all_ignored option.
2853 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2854 homing or because of multiple MX records with /mx) generated more than
2855 one IP address, and the following item turned out to be the local host,
2856 all the secondary addresses of the first item were incorrectly removed
2857 from the list, along with the local host and any following hosts (which
2858 is what is supposed to happen).
2860 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2861 whoever called Exim into the -H file. In the case of the daemon it was
2862 behaving confusingly. When first started, it used values for whoever
2863 started the daemon, but after a SIGHUP it used the Exim user (because it
2864 calls itself on a restart). I have changed the code so that it now always
2867 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2868 message are rejected with the same error (e.g. no authentication or bad
2869 sender address), and a DATA command is nevertheless sent (as can happen
2870 with PIPELINING or a stupid MUA), the error message that was given to the
2871 RCPT commands is included in the rejection of the DATA command. This is
2872 intended to be helpful for MUAs that show only the final error to their
2875 PH/42 Another patch from the Sieve maintainer.
2877 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2878 Eximstats - Fixed some broken HTML links and added missing column headers
2880 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2881 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2883 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2885 PH/43 Yet another patch from the Sieve maintainer.
2887 PH/44 I found a way to check for a TCP/IP connection going away before sending
2888 the response to the final '.' that terminates a message, but only in the
2889 case where the client has not sent further data following the '.'
2890 (unfortunately, this is allowed). However, in many cases there won't be
2891 any further data because there won't be any more messages to send. A call
2892 to select() can be used: if it shows that the input is "ready", there is
2893 either input waiting, or the socket has been closed. An attempt to read
2894 the next input character can distinguish the two cases. Previously, Exim
2895 would have sent an OK response which the client would never have see.
2896 This could lead to message repetition. This fix should cure that, at
2897 least in a lot of common cases.
2899 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2900 advertised in response to EHLO.
2906 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2907 fixed by 4.65/MH/01 (is this a record?) are fixed:
2909 (i) An empty string was always treated as zero by the numeric comparison
2910 operators. This behaviour has been restored.
2912 (ii) It is documented that the numeric comparison operators always treat
2913 their arguments as decimal numbers. This was broken in that numbers
2914 starting with 0 were being interpreted as octal.
2916 While fixing these problems I realized that there was another issue that
2917 hadn't been noticed. Values of message_size_limit (both the global option
2918 and the transport option) were treated as octal if they started with 0.
2919 The documentation was vague. These values are now always treated as
2920 decimal, and I will make that clear in the documentation.
2926 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2927 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2930 MH/01 Don't check that the operands of numeric comparison operators are
2931 integers when their expansion is in "skipping" mode (fixes bug
2932 introduced by 4.64-PH/07).
2934 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2935 child addresses, Exim now panics and dies. Previously, because the count
2936 is held in a short int, deliveries were likely to be lost. As such a
2937 large number of recipients for a single message is ridiculous
2938 (performance will be very, very poor), I have chosen to impose a limit
2939 rather than extend the field.
2945 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2946 leftover -K file (the existence of which was triggered by #402).
2947 While we were at it, introduced process PID as part of the -K
2948 filename. This should rule out race conditions when creating
2951 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2952 processing considerably. Previous code took too long for large mails,
2953 triggering a timeout which in turn triggers #401.
2955 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2956 in the DK code in transports.c. sendfile() is not really portable,
2957 hence the _LINUX specificness.
2959 TF/01 In the add_headers option to the mail command in an Exim filter,
2960 there was a bug that Exim would claim a syntax error in any
2961 header after the first one which had an odd number of characters
2964 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2965 callout verification, Exim cached a "reject" for the entire domain. This
2966 is correct for most verifications, but it is not correct for a recipient
2967 verification with use_sender or use_postmaster set, because in that case
2968 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2969 case of MAIL FROM:<> rejection from other early rejections (e.g.
2970 rejection of HELO). When verifying a recipient using a non-null MAIL
2971 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2972 Whatever the result of the callout, the value of the domain cache is
2973 left unchanged (for any other kind of callout, getting as far as trying
2974 RCPT means that the domain itself is ok).
2976 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2979 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2980 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2981 session, the daemon ignores ECONNECT errors and logs others; it now
2982 ignores EPIPE as well.
2984 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2985 (quoted-printable decoding).
2987 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2988 later the small subsequent patch to fix an introduced bug.
2990 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2992 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2994 PH/08 An error is now given if message_size_limit is specified negative.
2996 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2997 to be given (somewhat) arbitrary names.
2999 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3002 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3003 miscellaneous code fixes
3005 PH/10 Added the log_reject_target ACL modifier to specify where to log
3008 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3009 hostname. This is wrong, because it relates to the incoming message (and
3010 probably the interface on which it is arriving) and not to the outgoing
3011 callout (which could be using a different interface). This has been
3012 changed to use the value of the helo_data option from the smtp transport
3013 instead - this is what is used when a message is actually being sent. If
3014 there is no remote transport (possible with a router that sets up host
3015 addresses), $smtp_active_hostname is used.
3017 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3018 tweaks were necessary in order to get it to work (see also 21 below):
3019 (a) The code assumed that strncpy() returns a negative number on buffer
3020 overflow, which isn't the case. Replaced with Exim's string_format()
3022 (b) There were several signed/unsigned issues. I just did the minimum
3023 hacking in of casts. There is scope for a larger refactoring.
3024 (c) The code used strcasecmp() which is not a standard C function.
3025 Replaced with Exim's strcmpic() function.
3026 (d) The code set only $1; it now sets $auth1 as well.
3027 (e) A simple test gave the error "authentication client didn't specify
3028 service in request". It would seem that Dovecot has changed its
3029 interface. Fortunately there's a specification; I followed it and
3030 changed what the client sends and it appears to be working now.
3032 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3035 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3036 address A is aliased to B and C, where B exists and C does not. Without
3037 -v the output is "A verified" because verification stops after a
3038 successful redirection if more than one address is generated. However,
3039 with -v the child addresses are also verified. Exim was outputting "A
3040 failed to verify" and then showing the successful verification for C,
3041 with its parentage. It now outputs "B failed to verify", showing B's
3042 parentage before showing the successful verification of C.
3044 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3045 look up a TXT record in a specific list after matching in a combined
3048 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3049 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3050 they consult the DNS. I had assumed they would set it the way they
3051 wanted; and indeed my experiments on Linux seem to show that in some
3052 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3053 To be on the safe side, however, I have now made the interface to
3054 host_find_byname() similar to host_find_bydns(), with an argument
3055 containing the DNS resolver options. The host_find_byname() function now
3056 sets these options at its start, just as host_find_bydns() does. The smtp
3057 transport options dns_qualify_single and dns_search_parents are passed to
3058 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3059 of host_find_byname() use the default settings of RES_DEFNAMES
3060 (qualify_single) but not RES_DNSRCH (search_parents).
3062 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3063 spool_read_header() do less string testing, by means of a preliminary
3064 switch on the second character of optional "-foo" lines. (This is
3065 overdue, caused by the large number of possibilities that now exist.
3066 Originally there were few.) While I was there, I also converted the
3067 str(n)cmp tests so they don't re-test the leading "-" and the first
3068 character, in the hope this might squeeze out yet more improvement.
3070 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3071 flag allowing group syntax was set by the header_syntax check but not
3072 turned off, possible causing trouble later; (2) The flag was not being
3073 set at all for the header_verify test, causing "group"-style headers to
3074 be rejected. I have now set it in this case, and also caused header_
3075 verify to ignore an empty address taken from a group. While doing this, I
3076 came across some other cases where the code for allowing group syntax
3077 while scanning a header line wasn't quite right (mostly, not resetting
3078 the flag correctly in the right place). These bugs could have caused
3079 trouble for malformed header lines. I hope it is now all correct.
3081 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3082 with the "reply" argument non-NULL. The code, however (which originally
3083 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3084 but it didn't always do it. This confused somebody who was copying the
3085 code for some other use. I have removed all the tests.
3087 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3088 feature that was used to support insecure browsers during the U.S. crypto
3089 embargo. It requires special client support, and Exim is probably the
3090 only MTA that supported it -- and would never use it because real RSA is
3091 always available. This code has been removed, because it had the bad
3092 effect of slowing Exim down by computing (never used) parameters for the
3093 RSA_EXPORT functionality.
3095 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3096 authenticator to fail if there's a tab character in the incoming data
3097 (there should never be unless someone is messing about, as it's supposed
3098 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3099 if the connection is using TLS or if the remote IP is the same as the
3100 local IP, and the "valid-client-cert option" if a client certificate has
3103 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3104 authenticators. This can be used for authorization after authentication
3105 succeeds. (In the case of plaintext, it servers for both authentication
3108 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3109 if any retry times were supplied.
3111 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3112 connection, where there is no client IP address to check. In this
3113 situation, the verify now always succeeds.
3115 PH/25 Applied John Jetmore's -Mset patch.
3117 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3119 PH/27 In a string expansion for a processed (not raw) header when multiple
3120 headers of the same name were present, leading whitespace was being
3121 removed from all of them, but trailing whitespace was being removed only
3122 from the last one. Now trailing whitespace is removed from each header
3123 before concatenation. Completely empty headers in a concatenation (as
3124 before) are ignored.
3126 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3127 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3129 PH/29 [Removed. This was a change that I later backed out, and forgot to
3130 correct the ChangeLog entry (that I had efficiently created) before
3131 committing the later change.]
3133 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3134 address errors (4xx response to RCPT) over the same connection as other
3135 messages routed to the same hosts. Such deliveries are always "forced",
3136 so retry times are not inspected. This resulted in far too many retries
3137 for the affected addresses. The effect occurred only when there were more
3138 hosts than the hosts_max_try setting in the smtp transport when it had
3139 the 4xx errors. Those hosts that it had tried were not added to the list
3140 of hosts for which the message was waiting, so if all were tried, there
3141 was no problem. Two fixes have been applied:
3143 (i) If there are any address or message errors in an SMTP delivery, none
3144 of the hosts (tried or untried) are now added to the list of hosts
3145 for which the message is waiting, so the message should not be a
3146 candidate for sending over the same connection that was used for a
3147 successful delivery of some other message. This seems entirely
3148 reasonable: after all the message is NOT "waiting for some host".
3149 This is so "obvious" that I'm not sure why it wasn't done
3150 previously. Hope I haven't missed anything, but it can't do any
3151 harm, as the worst effect is to miss an optimization.
3153 (ii) If, despite (i), such a delivery is accidentally attempted, the
3154 routing retry time is respected, so at least it doesn't keep
3155 hammering the server.
3157 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3158 in ${readsocket because some servers need this prod.
3160 PH/32 Added some extra debug output when updating a wait-xxx database.
3162 PH/33 The hint "could be header name not terminated by colon", which has been
3163 given for certain expansion errors for a long time, was not being given
3164 for the ${if def:h_colon_omitted{... case.
3166 PH/34 The spec says: "With one important exception, whenever a domain list is
3167 being scanned, $domain contains the subject domain." There was at least
3168 one case where this was not true.
3170 PH/35 The error "getsockname() failed: connection reset by peer" was being
3171 written to the panic log as well as the main log, but it isn't really
3172 panic-worthy as it just means the connection died rather early on. I have
3173 removed the panic log writing for the ECONNRESET error when getsockname()
3176 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3177 runs only) independently of the message's sender address. This meant
3178 that, if the 4xx error was in fact related to the sender, a different
3179 message to the same recipient with a different sender could confuse
3180 things. In particular, this can happen when sending to a greylisting
3181 server, but other circumstances could also provoke similar problems.
3182 I have changed the default so that the retry time for these errors is now
3183 based a combination of the sender and recipient addresses. This change
3184 can be overridden by setting address_retry_include_sender=false in the
3187 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3188 remote server are returned as part of bounce messages. This was not
3189 happening for LMTP over a pipe (the lmtp transport), but now it is the
3190 same for both kinds of LMTP.
3192 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3193 in header lines that were in fact CNAMEs. This is no longer the case.
3195 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3196 and queue runs started by the daemon processed all messages. This has
3197 been fixed so that -R and -S can now usefully be given with -q<time>.
3199 PH/40 Import PCRE release 6.7 (fixes some bugs).
3201 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3203 PH/42 Give an error if -q is specified more than once.
3205 PH/43 Renamed the variables $interface_address and $interface_port as
3206 $received_ip_address and $received_port, to make it clear that these
3207 values apply to message reception, and not to the outgoing interface when
3208 a message is delivered. (The old names remain recognized, of course.)
3210 PH/44 There was no timeout on the connect() call when using a Unix domain
3211 socket in the ${readsocket expansion. There now is.
3213 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3214 be meaningful with "accept".
3216 SC/01 Eximstats V1.43
3217 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3219 SC/02 Eximstats V1.44
3220 Use a glob alias rather than an array ref in the generated
3221 parser. This improves both readability and performance.
3223 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3224 Collect SpamAssassin and rejection statistics.
3225 Don't display local sender or destination tables unless
3226 there is data to show.
3227 Added average volumes into the top table text output.
3229 SC/04 Eximstats V1.46
3230 Collect data on the number of addresses (recipients)
3231 as well as the number of messages.
3233 SC/05 Eximstats V1.47
3234 Added 'Message too big' to the list of mail rejection
3235 reasons (thanks to Marco Gaiarin).
3237 SC/06 Eximstats V1.48
3238 Mainlog lines which have GMT offsets and are too short to
3239 have a flag are now skipped.
3241 SC/07 Eximstats V1.49 (Alain Williams)
3242 Added the -emptyok flag.
3244 SC/08 Eximstats V1.50
3245 Fixes for obtaining the IP address from reject messages.
3247 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3248 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3249 whitespace changes from 4.64-PH/27
3251 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3254 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3255 are found, allow negative numbers in numeric criteria)
3257 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3259 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3260 to match changes made in 4.64-PH/43
3262 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3264 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3265 "domain" is actually an IP address, and force a failure. This locks out
3266 those revolvers/nameservers that support "A-for-A" lookups, in
3267 contravention of the specifications.
3269 PH/48 When a host name was looked up from an IP address, and the subsequent
3270 forward lookup of the name timed out, the host name was left in
3271 $sender_host_name, contrary to the specification.
3273 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3274 restricted to single-key lookups, Exim was not diagnosing an error if
3275 * or *@ was used with a query-style lookup.
3277 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3279 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3280 long ago, but noone interested enough thought of it. Let's just say that
3281 the "1.1" means that there are some new functions that weren't there at
3282 some point in the past.
3284 PH/51 Error processing for expansion failure of helo_data from an smtp
3285 transport during callout processing was broken.
3287 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3288 tested/used via the -bh/-bhc/-bs options.
3290 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3291 bug, fixed in subsequent PCRE releases).
3293 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3294 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3296 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3302 SC/01 Use a glob alias rather than an array ref in eximstats generated
3303 parser. This improves both readability and performance.
3305 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3306 Don't display local sender or destination tables in eximstats unless
3307 there is data to show.
3308 Added average volumes into the eximstats top table text output.
3310 SC/03 Collect data on the number of addresses (recipients) as well
3311 as the number of messages in eximstats.
3313 TF/01 Correct an error in the documentation for the redirect router. Exim
3314 does (usually) call initgroups() when daemonizing.
3316 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3317 with consistent privilege compared to when running as a daemon.
3319 TF/03 Note in the spec that $authenticated_id is not set for local
3320 submissions from trusted users.
3322 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3323 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3325 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3326 by adding some example configuration directives to the default
3327 configuration file. A little bit of work is required to uncomment the
3328 directives and define how usernames and passwords are checked, but
3329 there is now a framework to start from.
3331 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3332 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3333 without this. I don't know how relevant this is to other LDAP libraries.
3335 PH/02 Add the verb name to the "unknown ACL verb" error.
3337 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3339 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3341 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3342 directory not expanded when it should be if an expanded home directory
3343 was set for the address (which is overridden by the transport).
3345 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3348 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3349 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3350 because it is too late at that time, and has no effect.
3352 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3353 security issue with \' (bugzilla #107). I could not use the
3354 PQescapeStringConn() function, because it needs a PGconn value as one of
3357 PH/08 When testing addresses using -bt, indicate those final addresses that
3358 are duplicates that would not cause an additional delivery. At least one
3359 person was confused, thinking that -bt output corresponded to deliveries.
3360 (Suppressing duplicates isn't a good idea as you lose the information
3361 about possibly different redirections that led to the duplicates.)
3363 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3364 systems where poll() doesn't work, in particular OS X.
3366 PH/10 Added more information to debugging output for retry time not reached.
3368 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3369 operations in malware.c.
3371 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3374 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3375 syslog_duplication set false, log lines that would normally be written
3376 both the the main log and to the reject log were not written to syslog at
3379 PH/14 In the default configuration, change the use of "message" in ACL warn
3380 statements to "add_header".
3382 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3383 not followed by a command (e.g. "seen endif").
3385 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3386 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3389 PH/17 Added extra conditions to the default value of delay_warning_condition
3393 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3394 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3395 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3398 The Auto-Submitted: and various List- headers are standardised, whereas I
3399 don't think Precedence: ever was.
3401 PH/18 Refactored debugging code in route_finduser() to show more information,
3402 in particular, the error code if getpwnam() issues one.
3404 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3405 This is apparently needed in addition to the PH/07 change above to avoid
3406 any possible encoding problems.
3408 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3409 but not after initializing Perl.
3411 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3412 output them only if debugging. By default they are written stderr,
3413 apparently, which is not desirable.
3415 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3418 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3421 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3423 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3424 authenticated or an ident call has been made. Suppress the default
3425 values for $authenticated_id and $authenticated_sender (but permit -oMai
3426 and -oMas) when testing with -bh.
3428 PH/24 Re-jigged the order of the tests in the default configuration so that the
3429 tests for valid domains and recipients precede the DNS black list and CSA
3430 tests, on the grounds that those ones are more expensive.
3432 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3433 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3434 This bug exists in every version of Exim that I still have, right back to
3437 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3438 However, an attempt to turn on case-sensitivity in a regex key by
3439 including (?-i) didn't work because the subject string was already
3440 lowercased, and the effects were non-intuitive. It turns out that a
3441 one-line patch can be used to allow (?-i) to work as expected.
3447 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3448 other effects) broke the use of negated acl sub-conditions.
3450 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3453 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3454 "Deny" causes Exim to reject the incoming connection with a 554 error.
3455 Unfortunately, if there is a major crisis, such as a disk failure,
3456 tcp-wrappers gives "deny", whereas what one would like would be some
3457 kind of temporary error. A kludge has been added to help with this.
3458 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3459 554 error is used if errno is still zero or contains ENOENT (which occurs
3460 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3463 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3465 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3466 errors. Otherwise a message that provokes a temporary error (when other
3467 messages do not) can cause a whole host to time out.
3469 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3470 addresses were routed directly to files or pipes from a redirect router.
3471 File deliveries just didn't batch; pipe deliveries might have suffered
3474 PH/06 A failure to get a lock for a hints database would erroneously always say
3475 "Failed to get write lock", even when it was really a read lock.
3477 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3478 of 0600. This has been changed to use the value of the lockfile_mode
3479 option (which defaults to 0600).
3481 PH/08 Applied small patch from the Sieve maintainer.
3483 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3484 folder from quota calculations, a direct delivery into this folder messed
3485 up the contents of the maildirsize file. This was because the regex was
3486 used only to exclude .Trash (or whatever) when the size of the mailbox
3487 was calculated. There was no check that a delivery was happening into an
3488 excluded directory. This bug has been fixed by ignoring all quota
3489 processing for deliveries into excluded directories.
3491 PH/10 Added the maildirfolder_create_regex option to appendfile.
3497 PH/01 The code for finding all the local interface addresses on a FreeBSD
3498 system running IPv6 was broken. This may well have applied to all BSD
3499 systems, as well as to others that have similar system calls. The broken
3500 code found IPv4 interfaces correctly, but gave incorrect values for the
3501 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3502 that it would not match correctly against @[] and not recognize the IPv6
3505 PH/02 The ipliteral router was not recognizing addresses of the form user@
3506 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3508 PH/03 Added disable_ipv6.
3510 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3511 decoded form, because it is most often used to construct To: headers
3512 lines in autoreplies, and the decoded form may well be syntactically
3513 invalid. However, $reply_address has leading white space removed, and all
3514 newlines turned into spaces so that the autoreply transport does not
3517 PH/05 If group was specified without a user on a router, and no group or user
3518 was specified on a transport, the group from the router was ignored.
3520 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3521 for visible compile-time settings that can be used to change these
3522 numbers, for those that want even more. Backwards compatibility with old
3523 spool files has been maintained. However, going back to a previous Exim
3524 release will lost any variables that are in spool files.
3526 PH/07 Two small changes when running in the test harness: increase delay when
3527 passing a TCP/IP connection to a new process, in case the original
3528 process has to generate a bounce, and remove special handling of
3529 127.0.0.2 (sic), which is no longer necessary.
3531 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3532 be the same on different OS.
3534 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3537 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3538 whether --show-vars was specified or not
3540 JJ/02 exipick: Added support for new ACL variable spool format introduced
3543 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3544 syntactically invalid From: or Reply-to: line, and a filter used this to
3545 generate an autoreply, and therefore failed to obtain an address for the
3546 autoreply, Exim could try to deliver to a non-existent relative file
3547 name, causing unrelated and misleading errors. What now happens is that
3548 it logs this as a hard delivery error, but does not attempt to create a
3551 PH/11 The exinext utility has a -C option for testing purposes, but although
3552 the given file was scanned by exinext itself; it wasn't being passed on
3553 when Exim was called.
3555 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3556 an end-of-file indication when reading a command response.
3558 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3559 compiled. In many other places in Exim, IPv6 addresses are always
3560 recognized, so I have changed this. It also means that IPv4 domain
3561 literals of the form [IPV4:n.n.n.n] are now always recognized.
3563 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3564 used if the router is not running as root, for example, when verifying at
3565 ACL time, or when using -bh. The debugging output from this situation was
3566 non-existent - all you got was a failure to exec. I have made two
3569 (a) Failures to set uid/gid, the current directory, or a process leader
3570 in a subprocess such as that created by queryprogram now generate
3571 suitable debugging output when -d is set.
3573 (b) The queryprogram router detects when it is not running as root,
3574 outputs suitable debugging information if -d is set, and then runs
3575 the subprocess without attempting to change uid/gid.
3577 PH/15 Minor change to Makefile for building test_host (undocumented testing
3580 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3581 additional section of a DNS packet that returns MX or SRV records.
3582 Instead, it always explicitly searches for A/AAAA records. This avoids
3583 major problems that occur when a DNS server includes only records of one
3584 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3585 fixed another bug: if SRV records were looked up and the corresponding
3586 address records were *not* found in the additional section, the port
3587 values from the SRV records were lost.
3589 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3590 using the correct key (the original address) when searching the retry
3591 rules in order to find which one to use for generating the retry hint.
3593 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3594 adding the default one. Similarly, if it contains a Reply-To: header, the
3595 errors_reply_to option, if set, is not used.
3597 PH/19 When calculating a retry time, Exim used to measure the "time since
3598 failure" by looking at the "first failed" field in the retry record. Now
3599 it does not use this if it is later than than the arrival time of the
3600 message. Instead it uses the arrival time. This makes for better
3601 behaviour in cases where some deliveries succeed, thus re-setting the
3602 "first failed" field. An example is a quota failure for a huge message
3603 when small messages continue to be delivered. Without this change, the
3604 "time since failure" will always be short, possible causing more frequent
3605 delivery attempts for the huge message than are intended.
3606 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3608 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3609 $1, $2, $3) because the numerical variables can be reset during some
3610 expansion items (e.g. "match"), thereby losing the authentication data.
3612 PH/21 Make -bV show the size of off_t variables so that the test suite can
3613 decide whether to run tests for quotas > 2G.
3615 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3616 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3617 filecount value is greater than 2G or if a quota value is greater than 2G
3618 on a system where the size of off_t is not greater than 4, a panic error
3621 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3622 never match. The debug and -bh output now contains an explicit error
3623 message indicating a malformed IPv4 address or mask.
3625 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3626 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3627 PH/23 above applies.
3629 PH/25 Do not write to syslog when running in the test harness. The only
3630 occasion when this arises is a failure to open the main or panic logs
3631 (for which there is an explicit test).
3633 PH/26 Added the /no_tell option to "control=freeze".
3635 PH/27 If a host name lookup failed very early in a connection, for example, if
3636 the IP address matched host_lookup and the reverse lookup yielded a name
3637 that did not have a forward lookup, an error message of the form "no IP
3638 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3639 could be logged. Now it outputs the IP address instead of "NULL".
3641 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3642 allows the sender and the authenticated sender to be set when
3643 submitting a message from within Exim. Since child_open_exim() is
3644 documented for local_scan(), the new function should be too.
3646 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3647 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3648 results in an empty string is now treated as unset.
3650 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3652 PH/31 Added sender_verify_fail logging option.
3654 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3655 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3656 tidied the source and removed it altogether.
3658 PH/33 When a queue run was abandoned because the load average was too high, a
3659 log line was always written; now it is written only if the queue_run log
3660 selector is set. In addition, the log line for abandonment now contains
3661 information about the queue run such as the pid. This is always present
3662 in "start" and "stop" lines but was omitted from the "abandon" line.
3664 PH/34 Omit spaces between a header name and the colon in the error message that
3665 is given when verify = headers_syntax fails (if there are lots of them,
3666 the message gets confusing).
3668 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3669 names, as there are now some PTR records that contain slashes. This check
3670 is only to protect against broken name servers that fall over on strange
3671 characters, so the fact that it applies to all lookups doesn't matter.
3673 PH/36 Now that the new test suite is complete, we can remove some of the
3674 special code in Exim that was needed for the old test suite. For example,
3675 sorting DNS records because real resolvers return them in an arbitrary
3676 order. The new test suite's fake resolver always returns records in the
3679 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3680 bounces) except when queue_only is set, to avoid logging races between
3681 the different processes.
3683 PH/38 Panic-die if .include specifies a non-absolute path.
3685 PH/39 A tweak to the "H" retry rule from its user.
3687 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3688 a label. They prevented compilation on older perls.
3690 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3691 a warning to be raised on newish perls.
3693 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3694 on queue. Changes to match documented behaviour of showing count of
3695 messages matching specified criteria.
3697 PH/40 Changed the default ident timeout from 30s to 5s.
3699 PH/41 Added support for the use of login_cap features, on those BSD systems
3700 that have them, for controlling the resources used by pipe deliveries.
3702 PH/42 The content-scanning code uses fopen() to create files in which to put
3703 message data. Previously it was not paying any attention to the mode of
3704 the files. Exim runs with umask(0) because the rest of the code creates
3705 files with open(), and sets the required mode explicitly. Thus, these
3706 files were ending up world-writeable. This was not a big issue, because,
3707 being within the spool directory, they were not world-accessible. I have
3708 created a function called modefopen, which takes an additional mode
3709 argument. It sets umask(777), creates the file, chmods it to the required
3710 mode, then resets the umask. All the relevant calls to fopen() in the
3711 content scanning code have been changed to use this function.
3713 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3714 to 24 hours. This avoids potential overflow problems when processing G
3715 and H retry rules. I suspect nobody ever tinkers with this value.
3717 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3719 PH/45 When the plaintext authenticator is running as a client, the server's
3720 challenges are checked to ensure they are valid base64 strings. By
3721 default, the authentication attempt is cancelled if an invalid string is
3722 received. Setting client_ignore_invalid_base64 true ignores these errors.
3723 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3724 they are received. Thus, the responses can be made to depend on the
3725 challenges. If an invalid string is ignored, an empty string is placed in
3728 PH/46 Messages that are created by the autoreply transport now contains a
3729 References: header, in accordance with RFCs 2822 and 3834.
3731 PH/47 Added authenticated_sender_force to the smtp transport.
3733 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3735 PH/49 Installed latest patch from the Sieve maintainer.
3737 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3738 was also set, the appendfile transport was unnecessarily scanning a
3739 directory of message files (e.g. for maildir delivery) to find the count
3740 of files (along with the size), even though it did not need this
3741 information. It now does the scan only if it needs to find either the
3742 size of the count of files.
3744 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3746 PH/52 Two bugs concerned with error handling when the smtp transport is
3749 (i) Exim was not creating retry information for temporary errors given
3750 for individual recipients after the DATA command when the smtp transport
3751 was used in LMTP mode. This meant that they could be retried too
3752 frequently, and not timed out correctly.
3754 (ii) Exim was setting the flag that allows error details to be returned
3755 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3756 recipients that were returned after the DATA command.
3758 PH/53 This is related to PH/52, but is more general: for any failing address,
3759 when detailed error information was permitted to be returned to the
3760 sender, but the error was temporary, then after the final timeout, only
3761 "retry timeout exceeded" was returned. Now it returns the full error as
3762 well as "retry timeout exceeded".
3764 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3765 do this, and (what is worse) MTAs that accept it.
3767 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3768 will now be deprecated.
3770 PH/56 New os.c-cygwin from the Cygwin maintainer.
3772 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3773 formats (previously only available in exim formats via -bpr, -bpru,
3774 and -bpra. Now also available in native and exiqgrep formats)
3776 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3777 with very large, slow to parse queues
3779 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3781 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3783 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3784 responses to authentication challenges, though it was showing the
3785 challenges; (ii) I've removed the CR characters from the debug output for
3788 PH/58 Allow for the insertion of a newline as well as a space when a string
3789 is turned into more than one encoded-word during RFC 2047 encoding. The
3790 Sieve code now uses this.
3792 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3793 data_4xx, lost_connection, tls_required.
3795 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3796 message was being sent as an SMTP response.
3798 PH/61 Add -l and -k options to exicyclog.
3800 PH/62 When verifying, if an address was redirected to one new address, so that
3801 verification continued, and the new address failed or deferred after
3802 having set something in $address_data, the value of $address_data was not
3803 passed back to the ACL. This was different to the case when no
3804 redirection occurred. The value is now passed back in both cases.
3806 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3807 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3808 use login_cap.h, so on its own it isn't the distinguishing feature. The
3809 new name refers directly to the setclassresources() function.
3811 PH/65 Added configuration files for NetBSD3.
3813 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3815 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3816 is preferred over IPv4.
3818 PH/68 The bounce_return_message and bounce_return_body options were not being
3819 honoured for bounces generated during the reception of non-SMTP messages.
3820 In particular, this applied to messages rejected by the ACL. This bug has
3821 been fixed. However, if bounce_return_message is true and bounce_return_
3822 body is false, the headers that are returned for a non-SMTP message
3823 include only those that have been read before the error was detected.
3824 (In the case of an ACL rejection, they have all been read.)
3826 PH/69 The HTML version of the specification is now built in a directory called
3827 spec_html instead of spec.html, because the latter looks like a path with
3828 a MIME-type, and this confuses some software.
3830 PH/70 Catch two compiler warnings in sieve.c.
3832 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3833 function verify_get_ident() calls ip_connect() to connect a socket, but
3834 if the "connect()" function timed out, ip_connect() used to close the
3835 socket. However, verify_get_ident() also closes the socket later, and in
3836 between Exim writes to the log, which may get opened at this point. When
3837 the socket was closed in ip_connect(), the log could get the same file
3838 descriptor number as the socket. This naturally causes chaos. The fix is
3839 not to close the socket in ip_connect(); the socket should be closed by
3840 the function that creates it. There was only one place in the code where
3841 this was missing, in the iplookup router, which I don't think anybody now
3842 uses, but I've fixed it anyway.
3844 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3845 well as to direct DNS lookups. Otherwise the handling of names in host
3846 lists is inconsistent and therefore confusing.
3852 PH/01 Two changes to the default runtime configuration:
3854 (1) Move the checks for relay_from_hosts and authenticated clients from
3855 after to before the (commented out) DNS black list checks.
3857 (2) Add control=submission to the relay_from_hosts and authenticated
3858 clients checks, on the grounds that messages accepted by these
3859 statements are most likely to be submissions.
3861 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3863 (1) Generate an error if the third argument for the ${prvs expansion is
3866 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3869 (3) Reset the variables that are obtained from the first argument of
3870 ${prvscheck and used in the second argument before leaving the code,
3871 because their memory is reclaimed, so using them afterwards may do
3874 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3875 one (it's much easier than Tom thought :-).
3877 (5) Because of (4), we can now allow for the use of $prvscheck_result
3878 inside the third argument.
3880 PH/03 For some reason, the default setting of PATH when running a command from
3881 a pipe transport was just "/usr/bin". I have changed it to
3884 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3885 anything to be listed in the output from -bV.
3887 PH/05 When a filter generated an autoreply, the entire To: header line was
3888 quoted in the delivery log line, like this:
3890 => >A.N.Other <ano@some.domain> <original@ddress> ...
3892 This has been changed so that it extracts the operative address. There
3893 may be more than one such address. If so, they are comma-separated, like
3896 => >ano@some.domain,ona@other.domain <original@ddress> ...
3898 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3899 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3900 not being looked up in the rDNS to get a host name, Exim was showing the
3901 IP address twice in Received: lines, even though the IP addresses were
3902 identical. For example:
3904 Received: from [1.2.3.4] (helo=[1.2.3.4])
3906 However, if the real host name was known, it was omitting the HELO data
3907 if it matched the actual IP address. This has been tidied up so that it
3908 doesn't show the same IP address twice.
3910 PH/07 When both +timestamp and +memory debugging was on, the value given by
3911 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3912 called by the debug printing, thereby overwriting the timestamp buffer.
3913 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3915 PH/08 When the original message was included in an autoreply transport, it
3916 always said "this is a copy of the message, including all the headers",
3917 even if body_only or headers_only was set. It now gives an appropriate
3920 PH/09 Applied a patch from the Sieve maintainer which:
3922 o fixes some comments
3923 o adds the (disabled) notify extension core
3924 o adds some debug output for the result of if/elsif tests
3925 o points to the current vacation draft in the documentation
3926 and documents the missing references header update
3930 o fixes a bug in processing the envelope test (when testing
3931 multiple envelope elements, the last element determined the
3934 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3935 Electronic Mail") by including:
3937 Auto-submitted: auto-generated
3939 in the messages that it generates (bounce messages and others, such as
3940 warnings). In the case of bounce messages for non-SMTP messages, there was
3941 also a typo: it was using "Auto_submitted" (underscore instead of
3942 hyphen). Since every message generated by Exim is necessarily in response
3943 to another message, thes have all been changed to:
3945 Auto-Submitted: auto-replied
3947 in accordance with these statements in the RFC:
3949 The auto-replied keyword:
3951 - SHOULD be used on messages sent in direct response to another
3952 message by an automatic process,
3954 - MUST NOT be used on manually-generated messages,
3956 - MAY be used on Delivery Status Notifications (DSNs) and Message
3957 Disposition Notifications (MDNs),
3959 - MUST NOT be used on messages generated by automatic or periodic
3960 processes, except for messages which are automatic responses to
3963 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3964 to the default Received: header definition.
3966 PH/12 Added log selector acl_warn_skipped (default on).
3968 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3969 variables because (a) they are in the wrong storage pool and (b) even if
3970 they were copied, it wouldn't work properly because of the caching.
3972 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3973 checking when decoding. Apparently there are clients that generate
3974 overlong encoded strings. Why am I not surprised?
3976 PH/15 If the first argument of "${if match_address" was not empty, but did not
3977 contain an "@" character, Exim crashed. Now it writes a panic log message
3978 and treats the condition as false.
3980 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3982 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3983 extension "envelope-auth". The code is finished and in agreement with
3984 other implementations, but there is no documentation so far and in fact,
3985 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3986 not changing the active code.
3988 Print executed "if" and "elsif" statements when debugging is used. This
3989 helps a great deal to understand what a filter does.
3991 Document more things not specified clearly in RFC3028. I had all this
3992 sorted out, when out of a sudden new issues came to my mind. Oops."
3994 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3997 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3998 canonical form (as documented). However, after a host name lookup from
3999 the IP address, check_host() was doing a simple string comparison with
4000 addresses acquired from the DNS when checking that the found name did
4001 have the original IP as one of its addresses. Since any found IPv6
4002 addresses are likely to be in abbreviated form, the comparison could
4003 fail. Luckily, there already exists a function for doing the comparison
4004 by converting both addresses to binary, so now that is used instead of
4005 the text comparison.
4007 PH/20 There was another similar case to PH/19, when a complete host name was
4008 given in a host list; looking up its IP address could give an abbreviated
4009 form, whereas the current host's name might or might not be abbreviated.
4010 The same fix has been applied.
4016 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4017 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4020 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4021 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4023 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4025 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4026 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4027 Also, for "Auto-Submitted", treat anything other than "no" as
4028 non-personal, in accordance with RFC 3834. (Previously it treated
4029 anything starting "auto-" as non-personal.)
4031 TF/01 The control=submission/name=... option had a problem with syntax
4032 errors if the name included a slash character. The /name= option
4033 now slurps the rest of the string, so it can include any characters
4034 but it must come last in the list of options (after /sender_retain
4037 PH/05 Some modifications to the interface to the fake nameserver for the new
4045 TK/01 Added the "success_on_redirect" address verification option. See
4046 NewStuff for rationale and an example.
4048 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4050 PH/02 Patch to exigrep to allow it to work on syslog lines.
4052 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4053 fread() to skip over the body file's header line, because in Cygwin the
4054 header line is locked and is inaccessible.
4056 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4057 co-exist for some time) to make it clear that it is the Exim ID that is
4058 referenced, not the Message-ID: header line.
4060 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4061 string_format() function, because snprintf() does not exist on all
4064 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4065 ${stat: expansion item.
4067 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4068 protocol synchronization error", to keep the pedants happy.
4070 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4071 well as for IRIX systems, when gcc is being used. See the host.c source
4074 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4076 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4079 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4080 transport and to the smtp transport in LMTP mode.
4082 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4084 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4085 run a filter in a subprocess. This could lead to confusion in subsequent
4086 lookups in the parent process. There should also be a search_tidyup() at
4087 the end of the subprocess.
4089 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4090 only if the host matched helo_try_verify_hosts, which caused the
4091 verification to occur when the EHLO/HELO command was issued. The ACL just
4092 tested the remembered result. Now, if a previous verification attempt has
4093 not happened, "verify = helo" does it there and then.
4095 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4097 TK/03 Fix log output including CR from clamd.
4099 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4100 exist provoked a memory error which could cause a segfault.
4102 PH/15 Installed PCRE 6.2
4104 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4106 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4107 of the problem. Specifically, suggested +O2 rather than +O1 for the
4110 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4112 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4113 record, the port was not correctly logged when the outgoing_port log
4114 selector was set (it logged the transort's default port).
4116 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4117 fallback_hosts, and "hosts" in the smtp transport.
4119 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4120 host errors such as "Connection refused".
4122 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4123 authentication with radiusclient 0.4.9:
4125 - Error returned from rc_read_config was caught wrongly
4126 - Username/password not passed on to radius server due to wrong length.
4128 The presumption is that some radiusclient API changes for 4.51/PH/17
4129 were not taken care of correctly. The code is still untested by me (my
4130 Linux distribution still has 0.3.2 of radiusclient), but it was
4131 contributed by a Radius user.
4133 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4134 expanding the "port" option of the smtp transport.
4136 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4137 while reading a MIME header. Thanks to Tom Hughes for a patch.
4139 PH/24 Include config.h inside local_scan.h so that configuration settings are
4142 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4143 that in an ACL for RCPT (for example), you can examine exactly what was
4146 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4147 commands, but it was not correctly comparing the address with the actual
4148 client host address. Thus, it would show the EHLO address in Received:
4149 header lines when this was not necessary.
4151 PH/27 Added the % operator to ${eval:}.
4153 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4154 it should be ignoring failures (because with -C, for example, it has lost
4155 privilege). It wasn't ignoring creation failures other than "already
4158 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4161 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4162 because an input line was too long, either on its own, or by virtue of
4163 too many continuations, the temporary file was not being removed, and the
4164 return code was incorrect.
4166 PH/31 Missing "BOOL" in function definition in filtertest.c.
4168 PH/32 Applied Sieve patches from the maintainer.
4170 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4172 PH/33 Added "verify = not_blind".
4174 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4175 Local/Makefile (with some defaults set). These are used in built scripts
4176 such as exicyclog, but they have never been used in the exim_install
4177 script (though there are many overriding facilities there). I have
4178 arranged that the exim_install script now takes note of these two
4181 PH/35 Installed configuration files for Dragonfly.
4183 PH/36 When a locally submitted message by a trusted user did not contain a
4184 From: header, and the sender address was obtained from -f or from an SMTP
4185 MAIL command, and the trusted user did not use -F to supply a sender
4186 name, $originator_name was incorrectly used when constructing a From:
4187 header. Furthermore, $originator_name was used for submission mode
4188 messages from external hosts without From: headers in a similar way,
4189 which is clearly wrong.
4191 PH/37 Added control=suppress_local_fixups.
4193 PH/38 When log_selector = +received_sender was set, and the addition of the
4194 sender made the log line's construction buffer exactly full, or one byte
4195 less than full, an overflow happened when the terminating "\n" was
4198 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4199 when the result of a list match is failure because a DNS lookup failed.
4201 PH/40 RM_COMMAND is now used in the building process.
4203 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4204 the "build-* directories that it finds.
4206 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4207 address in a domain literal was a prefix of an interface address.
4209 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4210 when verifying a sender address, unless rewrite_headers is false.
4212 PH/44 Wrote a long comment about why errors_to addresses are verified as
4213 recipients, not senders.
4215 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4216 the ratelimit ACL was added.
4218 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4220 PH/46 Added extra information about PostgreSQL errors to the error string.
4222 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4223 avoiding the need to install special zones in a real server. This is
4224 backwards compatible; if it can't find the fake resolver, it drops back.
4225 Thus, both old and new test suites can be run.
4227 TF/02 Added util/ratelimit.pl
4229 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4230 clock is set back in time.
4232 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4233 Candler <B.Candler@pobox.com>.
4235 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4236 OK for addresses that are the result of redirections.
4238 PH/48 A number of further additions for the benefit of the new test suite,
4239 including a fake gethostbyname() that interfaces to the fake DNS resolver
4242 TF/06 The fix for widen_domains has also been applied to qualify_single and
4243 search_parents which are the other dnslookup options that can cause
4246 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4249 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4251 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4252 service" if it encountered an MX record with an empty target hostname.
4253 The message is now "an MX or SRV record indicated no SMTP service".
4255 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4256 if the DNS of the sending site is misconfigured. This is quite a
4257 common situation. This change restores the behaviour of treating a
4258 helo verification defer as a failure.
4260 PH/51 If self=fail was set on a router, the bounce message did not include the
4261 actual error message.
4267 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4269 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4270 command itself ended in error, the underlying message about the transport
4271 filter timeout was being overwritten with the pipe command error. Now the
4272 underlying error message should be appended to the second error message.
4274 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4276 PH/02 Reduce the amount of output that "make" produces by default. Full output
4277 can still be requested.
4279 PH/03 The warning log line about a condition test deferring for a "warn" verb
4280 was being output only once per connection, rather than after each
4281 occurrence (because it was using the same function as for successful
4282 "warn" verbs). This seems wrong, so I have changed it.
4284 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4285 it should not have, which might have caused a crash in the right
4286 circumstances, but probably never did.
4288 PH/04 Installed a modified version of Tony Finch's patch to make submission
4289 mode fix the return path as well as the Sender: header line, and to
4290 add a /name= option so that you can make the user's friendly name appear
4293 TF/03 Added the control = fakedefer ACL modifier.
4295 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4296 Mark Lowes for thorough testing.
4298 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4300 TK/03 Merged latest SRS patch from Miles Wilton.
4302 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4303 with the definition in sysexits.h (which is #included earlier).
4304 Fortunately, Exim does not actually use EX_OK. The code used to try to
4305 preserve the sysexits.h value, by assuming that macro definitions were
4306 scanned for macro replacements. I have been disabused of this notion,
4307 so now the code just undefines EX_OK before #including unistd.h.
4309 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4310 in the smtp transport. When a block could not be written in a single
4311 write() function, the timeout was being re-applied to each part-write.
4312 This seems wrong - if the receiver was accepting one byte at a time it
4313 would take for ever. The timeout is now adjusted when this happens. It
4314 doesn't have to be particularly precise.
4316 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4317 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4319 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4320 without a domain if the check to <postmaster@domain> fails.
4322 SC/01 Eximstats: added -xls and the ability to specify output files
4323 (patch written by Frank Heydlauf).
4325 SC/02 Eximstats: use FileHandles for outputting results.
4327 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4329 SC/04 Eximstats: fixed display of large numbers with -nvr option
4331 SC/05 Eximstats: fixed merging of reports with empty tables.
4333 SC/06 Eximstats: added the -include_original_destination flag
4335 SC/07 Eximstats: removed tabs and trailing whitespace.
4337 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4339 TK/06 MBOX spool code: Add real "From " MBOX separator line
4340 so the .eml file is really in mbox format (even though
4341 most programs do not really care). Patch from Alex Miller.
4343 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4344 The latter is generated from $received_to and is only set if the
4345 message has one envelope recipient. SA can use these headers,
4346 obviously out-of-the-box. Patch from Alex Miller.
4348 PH/08 The ${def test on a variable was returning false if the variable's
4349 value was "0", contrary to what the specification has always said!
4350 The result should be true unless the variable is empty.
4352 PH/09 The syntax error of a character other than { following "${if
4353 def:variable_name" (after optional whitespace) was not being diagnosed.
4354 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4355 accidental colon was present, for example, could give incorrect results.
4357 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4358 result is used (not including appendfile, where other changes are about
4361 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4362 This involved changing a lot of size variables from int to off_t. It
4363 should work with maildirs and everything.
4365 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4366 spamd dying while we are connected to it.
4368 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4371 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4372 function for BDB 4.3.
4374 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4376 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4377 the sources for PCRE have been re-arranged and more files are now
4380 PH/15 The code I had for printing potentially long long variables in PH/11
4381 above was not the best (it lost precision). The length of off_t variables
4382 is now inspected at build time, and an appropriate printing format (%ld
4383 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4384 to be "long long int" or "long int". This is needed for the internal
4385 formatting function string_vformat().
4387 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4388 the configuration file to be ":syslog", then the script "guesses" where
4389 the logs files are, rather than using the compiled in default. In our
4390 case the guess is not the same as the compiled default, so the script
4391 suddenly stopped working when I started to use syslog. The patch checks
4392 to see if log_file_path is "". If so, it attempts to read it from exim
4393 with no configuration file to get the compiled in version, before it
4394 falls back to the previous guessing code."
4396 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4397 implementing BATV in an Exim configuration. See NewStuff for the gory
4400 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4401 Makefile that are specific to HP-UX.
4403 PH/18 If the "use_postmaster" option was set for a recipient callout together
4404 with the "random" option, the postmaster address was used as the MAIL
4405 FROM address for the random test, but not for the subsequent recipient
4406 test. It is now used for both.
4408 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4409 patch removes a few documentation additions to RFC 3028, because the
4410 latest draft now contains them. It adds the new en;ascii-case comparator
4411 and a new error check for 8bit text in MIME parts. Comparator and
4412 require names are now matched exactly. I enabled the subaddress
4413 extension, but it is not well tested yet (read: it works for me)."
4415 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4416 rework some of the code of TK/09 above to avoid the hardwired use of
4417 "%lld" and "long long". Replaced the call to snprintf() with a call to
4420 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4421 records point to non-existent hosts", "retry timeout exceeded", and
4422 "retry time not reached for any host after a long failure period".
4424 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4425 experimental DomainKeys support:
4427 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4428 (2) On an error such as an illegally used "control", the wrong name for
4429 the control was given.
4431 These problems did NOT occur unless DomainKeys support was compiled.
4433 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4435 PH/24 Added ${if match_ip condition.
4437 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4438 databases so that it will be absolutely obvious if a crash occurs in the
4439 DB library. This is a regular occurrence (often caused by mis-matched
4442 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4443 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4444 picked up on a user's system that detects such things. There doesn't seem
4445 to be a gcc warning option for this - only an attribute that has to be
4446 put on the function's prototype. It seems that in Fedora Core 4 they have
4447 set this on a number of new functions. No doubt there will be more in due
4450 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4451 specify a transport. However, if an address that was verified by such a
4452 router was the subject of a callout, Exim crashed because it tried to
4453 read the rcpt_include_affixes from the non-existent transport. Now it
4454 just assumes that the setting of that option is false. This bug was
4455 introduced by 4.51/PH/31.
4457 PH/28 Changed -d+all to exclude +memory, because that information is very
4458 rarely of interest, but it makes the output a lot bigger. People tend to
4459 do -d+all out of habit.
4461 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4462 code in os-type was giving problems when libc.so lives in lib64, like on
4465 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4466 aren't the modern standard, and it seems that some systems' include files
4467 don't always have them. Exim was already checking for some of the newer
4468 ones like T_AAAA, and defining it itself. I've added checks for all the
4469 record types that Exim uses.
4471 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4472 not automatically generating a new one, as it is supposed to. This
4473 prevented TLS from working. If the file did exist, but contained invalid
4474 data, a new version was generated, as expected. It was only the case of a
4475 non-existent file that was broken.
4477 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4478 with a change in libdomainkeys > 0.64.
4480 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4481 from DNS. If the selector record carries the flag, it now has
4482 precedence over the domain-wide flag.
4484 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4486 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4487 the use of a port name that isn't defined in /etc/services) occurred, the
4488 message was deferred as in a normal delivery, and thus remained on the
4489 spool, instead of being failed because of the mua_wrapper setting. This
4490 is now fixed, and I tidied up some of the mua_wrapper messages at the
4493 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4494 the messages in a hash of arrays rather than using individual hashes.
4495 This is a bit cleaner and results in dramatic memory savings, albeit
4496 at a slight CPU cost.
4498 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4499 as requested by Marc Sherman.
4501 SC/10 Eximstats: added histograms for user specified patterns as requested
4504 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4506 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4507 fopen() in the content-scanning modules that did not already have it.
4513 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4514 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4516 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4518 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4520 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4521 to test Sieve filters that use "vacation".
4523 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4524 that changes the way the GnuTLS parameters are stored in the cache file.
4525 The new format can be generated externally. For backward compatibility,
4526 if the data in the cache doesn't make sense, Exim assumes it has read an
4527 old-format file, and it generates new data and writes a new file. This
4528 means that you can't go back to an older release without removing the
4531 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4532 work if there are any delivery delays because "one_time" forces the
4533 parent to be marked "delivered", so its unseen clone is never tried
4534 again. For this reason, Exim now forbids the simultaneous setting of
4537 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4538 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4539 entry if you want to know the details. The fix, however, neglected to
4540 consider the case when local delivery batching is involved. The test for
4541 "previously delivered" was not happening when checking to see if an
4542 address could be batched with a previous (undelivered) one; under
4543 certain circumstances this could lead to multiple deliveries to the same
4546 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4547 in its include files, and this causes problems building Exim.
4549 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4550 header_syntax) but Exim was just ignoring anything given after a slash.
4551 In particular, this caused confusion with an attempt to use "verify =
4552 reverse_host_lookup/defer_ok". An error is now given when options are
4553 supplied for verify items that do not have them. (Maybe reverse_host_
4554 lookup should have a defer_ok option, but that's a different point.)
4556 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4557 defined by RFC 821) to 2048, because there were problems with some AUTH
4558 commands, and RFC 1869 says the size should be increased for extended
4559 SMTP commands that take arguments.
4561 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4564 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4565 "unknown" error; now it says that the functionality isn't in the binary.
4567 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4568 an address' error message when a string expansion fails (syntax or
4569 whatever). Otherwise the password may appear in the log. Following change
4570 PH/42 below, there is no longer a chance of it appearing in a bounce
4573 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4575 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4576 of its addresses was ever tried. (Bugzilla bug #2.)
4578 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4579 the result incorrectly in the debug output. (It correctly added a newline
4580 to what was transported.)
4582 TF/01 Added $received_time.
4584 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4585 commented out examples of how to interface to a virus scanner and to
4586 SpamAssassin. Also added commented examples of av_scanner and
4587 spamd_address settings.
4589 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4590 and controls are allowed in which ACLs. There were a couple of minor
4591 errors. Some of the entries in the conditions table (which is a table of
4592 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4593 negation of where the condition IS allowed.
4595 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4597 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4598 header file does not have a version number, so I've had to invent a new
4599 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4600 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4601 radiusclient), but it was contributed by a Radius user.
4603 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4604 files or directories, for OpenSSL.
4606 PH/19 When an Exim process that is running as root has to create an Exim log
4607 file, it does so in a subprocess that runs as exim:exim so as to get the
4608 ownership right at creation (otherwise, other Exim processes might see
4609 the file with the wrong ownership). There was no test for failure of this
4610 fork() call, which would lead to the process getting stuck as it waited
4611 for a non-existent subprocess. Forks do occasionally fail when resources
4612 run out. I reviewed all the other calls to fork(); they all seem to check
4615 PH/20 When checking for unexpected SMTP input at connect time (before writing
4616 the banner), Exim was not dealing correctly with a non-positive return
4617 from the read() function. If the client had disconnected by this time,
4618 the result was a log entry for a synchronization error with an empty
4619 string after "input=" when read() returned zero. If read() returned -1
4620 (an event I could not check), uninitialized data bytes were printed.
4621 There were reports of junk text (parts of files, etc) appearing after
4624 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4626 PH/22 Added support for macro redefinition, and (re)definition in between
4627 driver and ACL definitions.
4629 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4630 forgetting to use the resulting value; it was using the unexpanded value.
4632 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4633 hadn't been configured. The fix is from Juergen Kreileder, who
4634 understands it better than I do:
4636 "Here's what I see happening with three configured cyrus_sasl
4637 authenticators configured (plain, login, cram-md5):
4639 On startup auth_cyrus_sasl_init() gets called for each of these.
4640 This means three calls to sasl_listmech() without a specified mech_list.
4641 => SASL tests which mechs of all available mechs actually work
4642 => three warnings about OTP not working
4643 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4645 With the patch, sasl_listmech() also gets called three times. But now
4646 SASL's mech_list option is set to the server_mech specified in the the
4647 authenticator. Or in other words, the answer from sasl_listmech()
4648 gets limited to just the mech you're testing for (which is different
4650 => the return list contains just 'plain' or 'login', 'cram-md5' or
4651 nothing depending on the value of ob->server_mech.
4653 I've just tested the patch: Authentication still works fine,
4654 unavailable mechs specified in the exim configuration are still
4655 caught, and the auth.log warnings about OTP are gone."
4657 PH/25 When debugging is enabled, the contents of the command line are added
4658 to the debugging output, even when log_selector=+arguments is not
4661 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4662 answer is "GNU", and only if the return is "GNU/something" is the answer
4665 PH/27 $acl_verify_message is now set immediately after the failure of a
4666 verification in an ACL, and so is available in subsequent modifiers. In
4667 particular, the message can be preserved by coding like this:
4669 warn !verify = sender
4670 set acl_m0 = $acl_verify_message
4672 Previously, $acl_verify_message was set only while expanding "message"
4673 and "log_message" when a very denied access.
4675 PH/28 Modified OS/os.c-Linux with
4677 -#ifndef OS_LOAD_AVERAGE
4678 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4680 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4681 nomenclature these days.)
4683 PH/29 Installed patch from the Sieve maintainer that adds the options
4684 sieve_useraddress and sieve_subaddress to the redirect router.
4686 PH/30 In these circumstances:
4687 . Two addresses routed to the same list of hosts;
4688 . First host does not offer TLS;
4689 . First host accepts first address;
4690 . First host gives temporary error to second address;
4691 . Second host offers TLS and a TLS session is established;
4692 . Second host accepts second address.
4693 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4694 and peerdn, if requested) that were in fact used only for the second
4697 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4698 attention to any local part prefix or suffix that was matched by the
4699 router that accepted the address. It now behaves in the same way as it
4700 does for delivery: the affixes are removed from the local part unless
4701 rcpt_include_affixes is set on the transport.
4703 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4704 timeout during the DATA phase of an incoming message.
4706 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4707 applied a patch sanctioned by the Sieve maintainer.
4709 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4710 the uid or gid is negative. A case of a negative gid caused this to be
4711 noticed. The fix allows for either to be negative.
4713 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4714 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4717 PH/36 The change PH/12 above was broken. Fixed it.
4719 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4720 the grounds that routing the same address twice would always produce the
4721 same answer. This might have been true once, but it is certainly no
4722 longer true now. Routing a child address may depend on the previous
4723 routing that produced that child. Some complicated redirection strategies
4724 went wrong when messages had multiple recipients, and made Exim's
4725 behaviour dependent on the order in which the addresses were given.
4727 I have moved the duplicate checking until after the routing is complete.
4728 Exim scans the addresses that are assigned to local and remote
4729 transports, and removes any duplicates. This means that more work will be
4730 done, as duplicates will always all be routed, but duplicates are
4731 presumably rare, so I don't expect this is of any significance.
4733 For deliveries to pipes, files, and autoreplies, the duplicate checking
4734 still happens during the routing process, since they are not going to be
4737 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4738 It corrects a timeout issue with spamd. This is Ian's comment: "The
4739 background is that sometimes spamd either never reads data from a
4740 connection it has accepted, or it never writes response data. The exiscan
4741 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4742 blindly assumes that writes won't block so it may never time out."
4744 PH/39 Allow G after quota size as well as K and M.
4746 PH/40 The value set for $authenticated_id in an authenticator may not contain
4747 binary zeroes or newlines because the value is written to log lines and
4748 to spool files. There was no check on this. Now the value is run through
4749 the string_printing() function so that such characters are converted to
4750 printable escape sequences.
4752 PH/41 $message_linecount is a new variable that contains the total number of
4753 lines in the message. Compare $body_linecount, which is the count for the
4756 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4757 bounce and delay warning messages, except in certain special cases, which
4760 (a) An SMTP error message from a remote host;
4761 (b) A message specified in a :fail: redirection;
4762 (c) A message specified in a "fail" command in a system filter;
4763 (d) A message specified in a FAIL return from the queryprogram router;
4764 (e) A message specified by the cannot_route_message router option.
4766 In these cases only, Exim does include the error details in bounce and
4767 warning messages. There are also a few cases where bland messages such
4768 as "unrouteable address" or "local delivery error" are given.
4770 PH/43 $value is now also set for the "else" part of a ${run expansion.
4772 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4773 being worked on, but at least Exim now implements the latest version to
4776 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4777 process to complete was treated as a delivery failure, a timeout while
4778 writing the message to the pipe was logged, but erroneously treated as a
4779 successful delivery. Such timeouts include transport filter timeouts. For
4780 consistency with the overall process timeout, these timeouts are now
4781 treated as errors, giving rise to delivery failures by default. However,
4782 there is now a new Boolean option for the pipe transport called
4783 timeout_defer, which, if set TRUE, converts the failures into defers for
4784 both kinds of timeout. A transport filter timeout is now identified in
4787 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4788 systems where "make" and "gmake" are different, calling "gmake" at top
4789 level broke things. I've arranged for the value of $(MAKE) to be passed
4790 from the Makefile to this script so that it can call the same version of
4794 A note about Exim versions 4.44 and 4.50
4795 ----------------------------------------
4797 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4798 changes of various kinds. As a consequence, a big documentation update was
4799 needed. This delayed the release for rather longer than seemed good, especially
4800 in the light of a couple of (minor) security issues. Therefore, the changes
4801 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4802 release. So 4.44 and 4.50 are in effect two different branches that both start
4805 I have left the 4.50 change log unchanged; it contains all the changes since
4806 4.43. The change log for 4.44 is below; many of its items are identical to
4807 those for 4.50. This seems to be the most sensible way to preserve the
4808 historical information.
4814 1. Minor wording change to the doc/README.SIEVE file.
4816 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4817 computation of the current number of files was incorrect.
4819 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4820 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4823 4. Give more explanation in the error message when the command for a transport
4824 filter fails to execute.
4826 5. There are several places where Exim runs a non-Exim command in a
4827 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4828 was being done only for the command run by the queryprogram router. It is
4829 now done for all such subprocesses. The other cases are: ${run, transport
4830 filters, and the commands run by the lmtp and pipe transports.
4832 6. Added CONFIGURE_GROUP build-time option.
4834 7. Some older OS have a limit of 256 on the maximum number of file
4835 descriptors. Exim was using setrlimit() to set 1000 as a large value
4836 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4837 systems. I've change it so that if it can't get 1000, it tries for 256.
4839 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4840 was an oversight, and furthermore, ever since the addition of extra
4841 controls (e.g. 4.43/32), the checks on when to allow different forms of
4842 "control" were broken. There should now be diagnostics for all cases when a
4843 control that does not make sense is encountered.
4845 9. Added the /retain_sender option to "control=submission".
4847 10. $recipients is now available in the predata ACL (oversight).
4849 11. Tidy the search cache before the fork to do a delivery from a message
4850 received from the command line. Otherwise the child will trigger a lookup
4851 failure and thereby defer the delivery if it tries to use (for example) a
4852 cached ldap connection that the parent has called unbind on.
4854 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4855 of $address_data from the recipient verification was clobbered by the
4856 sender verification.
4858 13. The value of address_data from a sender verification is now available in
4859 $sender_address_data in subsequent conditions in the ACL statement.
4861 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4863 15. Added a new option "connect=<time>" to callout options, to set a different
4866 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4867 was its contents. (It was OK if the option was not defined at all.)
4869 17. A "Completed" log line is now written for messages that are removed from
4870 the spool by the -Mrm option.
4872 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4873 information about exactly what failed.
4875 19. Added -dd to debug only the daemon process.
4877 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4878 handles timeouts, both on the server side and network timeouts. Renamed the
4879 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4881 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4882 It is now set to "smtps".
4884 22. $host_address is now set to the target address during the checking of
4885 ignore_target_hosts.
4887 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4888 being passed; this would have caused $sender_host_name to have been used if
4889 matching the list had actually called for a host name (not very likely,
4890 since this list is usually IP addresses). A host name is now passed as
4893 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4894 code that specifies a non-restarting handler (typically sigaction() in
4895 modern systems) in an attempt to fix a rare and obscure crash bug.
4897 25. Narrowed the window for a race in the daemon that could cause it to ignore
4898 SIGCHLD signals. This is not a major problem, because they are used only to
4899 wake it up if nothing else does.
4901 26. A malformed maildirsize file could cause Exim to calculate negative values
4902 for the mailbox size or file count. Odd effects could occur as a result.
4903 The maildirsize information is now recalculated if the size or filecount
4906 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4907 support for a long time. Removed HAVE_SYS_VFS_H.
4909 28. Installed the latest version of exipick from John Jetmore.
4911 29. In an address list, if the pattern was not a regular expression, an empty
4912 subject address (from a bounce message) matched only if the pattern was an
4913 empty string. Non-empty patterns were not even tested. This was the wrong
4914 because it is perfectly reasonable to use an empty address as part of a
4915 database query. An empty address is now tested by patterns that are
4916 lookups. However, all the other forms of pattern expect the subject to
4917 contain a local part and a domain, and therefore, for them, an empty
4918 address still always fails if the pattern is not itself empty.
4920 30. Exim went into a mad DNS loop when attempting to do a callout where the
4921 host was specified on an smtp transport, and looking it up yielded more
4922 than one IP address.
4924 31. Re-factored the code for checking spool and log partition space into a
4925 function that finds that data and another that does the check. The former
4926 is then used to implement four new variables: $spool_space, $log_space,
4927 $spool_inodes, and $log_inodes.
4929 32. The RFC2047 encoding function was originally intended for short strings
4930 such as real names; it was not keeping to the 75-character limit for
4931 encoded words that the RFC imposes. It now respects the limit, and
4932 generates multiple encoded words if necessary. To be on the safe side, I
4933 have increased the buffer size for the ${rfc2047: expansion operator from
4936 33. It is now permitted to omit both strings after an "if" condition; if the
4937 condition is true, the result is "true". As before, when the second string
4938 is omitted, a false condition yields an empty string. This makes it less
4939 cumbersome to write custom ACL and router conditions.
4941 34. Failure to deliver a bounce message always caused it to be frozen, even if
4942 there was an errors_to setting on the router. The errors_to setting is now
4945 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4946 canonical form (fully expanded) before being placed in
4947 $sender_host_address.
4949 36. The table in the code that translates DNS record types into text (T_A to
4950 "A" for instance) was missing entries for NS and CNAME. It is just possible
4951 that this could have caused confusion if both these types were looked up
4952 for the same domain, because the text type is used as part of Exim's
4953 per-process caching. But the chance of anyone hitting this buglet seems
4956 37. The dnsdb lookup has been extended in a number of ways.
4958 (1) There is a new type, "zns", which walks up the domain tree until it
4959 finds some nameserver records. It should be used with care.
4961 (2) There is a new type, "mxh", which is like "mx" except that it returns
4962 just the host names, not the priorities.
4964 (3) It is now possible to give a list of domains (or IP addresses) to be
4965 looked up. The behaviour when one of the lookups defers can be
4966 controlled by a keyword.
4968 (4) It is now possible to specify the separator character for use when
4969 multiple records are returned.
4971 38. The dnslists ACL condition has been extended: it is now possible to supply
4972 a list of IP addresses and/or domains to be looked up in a particular DNS
4975 39. Added log_selector=+queue_time_overall.
4977 40. When running the queue in the test harness, wait just a tad after forking a
4978 delivery process, to get repeatability of debugging output.
4980 41. Include certificate and key file names in error message when GnuTLS fails
4981 to set them up, because the GnuTLS error message doesn't include the name
4982 of the failing file when there is a problem reading it.
4984 42. Allow both -bf and -bF in the same test run.
4986 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4988 44. The "Exiscan patch" is now merged into the mainline Exim source.
4990 45. Sometimes the final signoff response after QUIT could fail to get
4991 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4992 < 0 before doing a fflush(). This bug looks as though it goes back to the
4993 introduction of TLS in release 3.20, but "sometimes" must have been rare
4994 because the tests only now provoked it.
4996 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4997 (this can affect the format of dates).
4999 47. exim_tidydb, when checking for the continued existence of a message for
5000 which it has found a message-specific retry record, was not finding
5001 messages that were in split spool directories. Consequently, it was
5002 deleting retry records that should have stayed in existence.
5004 48. Steve fixed some bugs in eximstats.
5006 49. The SPA authentication driver was not abandoning authentication and moving
5007 on to the next authenticator when an expansion was forced to fail,
5008 contradicting the general specification for all authenticators. Instead it
5009 was generating a temporary error. It now behaves as specified.
5011 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5012 (the order specifies the preference for clients). The order is now AES256,
5013 AES128, 3DES, ARCFOUR128.
5015 51. Small patch to Sieve code - explicitly set From: when generating an
5018 52. Exim crashed if a remote delivery caused a very long error message to be
5019 recorded - for instance if somebody sent an entire SpamAssassin report back
5020 as a large number of 550 error lines. This bug was coincidentally fixed by
5021 increasing the size of one of Exim's internal buffers (big_buffer) that
5022 happened as part of the Exiscan merge. However, to be on the safe side, I
5023 have made the code more robust (and fixed the comments that describe what
5026 53. Now that there can be additional text after "Completed" in log lines (if
5027 the queue_time_overall log selector is set), a one-byte patch to exigrep
5028 was needed to allow it to recognize "Completed" as not the last thing in
5031 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5032 patch that reportedly fixes this has been added. I am not expert enough to
5033 create a test for it. This is what the patch creator wrote:
5035 "I found a little strange behaviour of ldap code when working with
5036 Windows 2003 AD Domain, where users was placed in more than one
5037 Organization Units. When I tried to give exim partial DN, the exit code
5038 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5039 But simultaneously result of request was absolutely normal ldap result,
5040 so I produce this patch..."
5042 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5043 REFERENCE, so I have modified the code to exclude the patch when that macro
5046 55. Some experimental protocols are using DNS PTR records for new purposes. The
5047 keys for these records are domain names, not reversed IP addresses. The
5048 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5049 leaves it alone. Component reversal etc. now happens only for IP addresses.
5052 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5054 57. Double the size of the debug message buffer (to 2048) so that more of very
5055 long debug lines gets shown.
5057 58. The exicyclog utility now does better if the number of log files to keep
5058 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5060 59. Two changes related to the smtp_active_hostname option:
5062 (1) $smtp_active_hostname is now available as a variable.
5063 (2) The default for smtp_banner uses $smtp_active_hostname instead
5064 of $primary_hostname.
5066 60. The host_aton() function is supposed to be passed a string that is known
5067 to be a valid IP address. However, in the case of IPv6 addresses, it was
5068 not checking this. This is a hostage to fortune. Exim now panics and dies
5069 if the condition is not met. A case was found where this could be provoked
5070 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5071 components; fortuitously, this particular loophole had already been fixed
5072 by change 4.50/55 above.
5074 If there are any other similar loopholes, the new check in host_aton()
5075 itself should stop them being exploited. The report I received stated that
5076 data on the command line could provoke the exploit when Exim was running as
5077 exim, but did not say which command line option was involved. All I could
5078 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5079 running as the user.
5082 61. There was a buffer overflow vulnerability in the SPA authentication code
5083 (which came originally from the Samba project). I have added a test to the
5084 spa_base64_to_bits() function which I hope fixes it.
5087 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5088 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5090 63. The daemon start-up calls getloadavg() while still root for those OS that
5091 need the first call to be done as root, but it missed one case: when
5092 deliver_queue_load_max is set with deliver_drop_privilege. This is
5093 necessary for the benefit of the queue runner, because there is no re-exec
5094 when deliver_drop_privilege is set.
5096 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5097 This has been fixed.
5099 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5100 was in use, was not putting the data itself into the right store pool;
5101 consequently, it could be overwritten for a subsequent message in the same
5102 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5105 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5107 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5108 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5109 the function were treating the return as a boolean value, which happened to
5110 work because 0=false and not-0=true, but is not correct code.
5112 68. The host_aton() function was not handling scoped IPv6 addresses (those
5113 with, for example, "%eth0" on the end) correctly.
5115 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5116 negated items (that is, ~something) in unsigned ints. Some compilers
5117 apparently mutter when there is no cast.
5119 70. If an address verification called from an ACL failed, and did not produce a
5120 user-specific message (i.e. there was only a "system" message), nothing was
5121 put in $acl_verify_message. In this situation, it now puts the system
5124 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5125 session; change 4.31/43 added the unwanted input to the log line - except
5126 that it did not do this in the start of session case. It now does.
5128 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5129 This is wrong and can cause the other end to generate a synchronization
5130 error if it is another Exim or anything else that does the synchronization
5131 check. A QUIT command is no longer sent after a timeout.
5133 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5134 during host lookups.
5136 74. The defer_ok option of callout verification was not working if it was used
5137 when verifying addresses in header lines, that is, for this case:
5139 verify = header_sender/callout=defer_ok
5141 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5142 those file descriptors could be used for SMTP connections. If anything
5143 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5144 could be sent to the SMTP client, causing chaos. The daemon now opens
5145 stdin, stdout, and stderr to /dev/null when it puts itself into the
5148 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5149 log by default. The user can override this with suitable Perl magic.
5151 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5152 the log message when discard triggers, was not working for the DATA ACL or
5153 for the non-SMTP ACL.
5155 78. Error message wording change in sieve.c.
5157 79. If smtp_accept_max_per_host was set, the number of connections could be
5158 restricted to fewer than expected, because the daemon was trying to set up
5159 a new connection before checking whether the processes handling previous
5160 connections had finished. The check for completed processes is now done
5161 earlier. On busy systems, this bug wouldn't be noticed because something
5162 else would have woken the daemon, and it would have reaped the completed
5165 80. If a message was submitted locally by a user whose login name contained one
5166 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5167 It caused a spool format error. I have fixed the spool reading code. A
5168 related problem was that the "from" clause in the Received: line became
5169 illegal because of the space(s). It is now covered by ${quote_local_part.
5171 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5174 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5176 83. Patch from Sieve maintainer to fix unterminated string problem in
5177 "vacation" handling.
5179 84. Some minor changes to the Linux configuration files to help with other
5180 OS variants using glibc.
5182 85. One more patch for Sieve to update vacation handling to latest spec.
5185 ----------------------------------------------------
5186 See the note above about the 4.44 and 4.50 releases.
5187 ----------------------------------------------------
5193 1. Change 4.43/35 introduced a bug that caused file counts to be
5194 incorrectly computed when quota_filecount was set in an appendfile
5197 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5198 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5201 3. Give more explanation in the error message when the command for a transport
5202 filter fails to execute.
5204 4. There are several places where Exim runs a non-Exim command in a
5205 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5206 was being done only for the command run by the queryprogram router. It is
5207 now done for all such subprocesses. The other cases are: ${run, transport
5208 filters, and the commands run by the lmtp and pipe transports.
5210 5. Some older OS have a limit of 256 on the maximum number of file
5211 descriptors. Exim was using setrlimit() to set 1000 as a large value
5212 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5213 systems. I've change it so that if it can't get 1000, it tries for 256.
5215 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5216 was an oversight, and furthermore, ever since the addition of extra
5217 controls (e.g. 4.43/32), the checks on when to allow different forms of
5218 "control" were broken. There should now be diagnostics for all cases when a
5219 control that does not make sense is encountered.
5221 7. $recipients is now available in the predata ACL (oversight).
5223 8. Tidy the search cache before the fork to do a delivery from a message
5224 received from the command line. Otherwise the child will trigger a lookup
5225 failure and thereby defer the delivery if it tries to use (for example) a
5226 cached ldap connection that the parent has called unbind on.
5228 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5229 of $address_data from the recipient verification was clobbered by the
5230 sender verification.
5232 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5233 was its contents. (It was OK if the option was not defined at all.)
5235 11. A "Completed" log line is now written for messages that are removed from
5236 the spool by the -Mrm option.
5238 12. $host_address is now set to the target address during the checking of
5239 ignore_target_hosts.
5241 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5242 being passed; this would have caused $sender_host_name to have been used if
5243 matching the list had actually called for a host name (not very likely,
5244 since this list is usually IP addresses). A host name is now passed as
5247 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5248 code that specifies a non-restarting handler (typically sigaction() in
5249 modern systems) in an attempt to fix a rare and obscure crash bug.
5251 15. Narrowed the window for a race in the daemon that could cause it to ignore
5252 SIGCHLD signals. This is not a major problem, because they are used only to
5253 wake it up if nothing else does.
5255 16. A malformed maildirsize file could cause Exim to calculate negative values
5256 for the mailbox size or file count. Odd effects could occur as a result.
5257 The maildirsize information is now recalculated if the size or filecount
5260 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5261 support for a long time. Removed HAVE_SYS_VFS_H.
5263 18. Updated exipick to current release from John Jetmore.
5265 19. Allow an empty sender to be matched against a lookup in an address list.
5266 Previously the only cases considered were a regular expression, or an
5269 20. Exim went into a mad DNS lookup loop when doing a callout where the
5270 host was specified on the transport, if the DNS lookup yielded more than
5273 21. The RFC2047 encoding function was originally intended for short strings
5274 such as real names; it was not keeping to the 75-character limit for
5275 encoded words that the RFC imposes. It now respects the limit, and
5276 generates multiple encoded words if necessary. To be on the safe side, I
5277 have increased the buffer size for the ${rfc2047: expansion operator from
5280 22. Failure to deliver a bounce message always caused it to be frozen, even if
5281 there was an errors_to setting on the router. The errors_to setting is now
5284 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5285 canonical form (fully expanded) before being placed in
5286 $sender_host_address.
5288 24. Updated eximstats to version 1.33
5290 25. Include certificate and key file names in error message when GnuTLS fails
5291 to set them up, because the GnuTLS error message doesn't include the name
5292 of the failing file when there is a problem reading it.
5294 26. Expand error message when OpenSSL has problems setting up cert/key files.
5297 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5298 (this can affect the format of dates).
5300 28. exim_tidydb, when checking for the continued existence of a message for
5301 which it has found a message-specific retry record, was not finding
5302 messages that were in split spool directories. Consequently, it was
5303 deleting retry records that should have stayed in existence.
5305 29. eximstats updated to version 1.35
5306 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5307 1.35 - bugfix such that pie charts by volume are generated correctly
5309 30. The SPA authentication driver was not abandoning authentication and moving
5310 on to the next authenticator when an expansion was forced to fail,
5311 contradicting the general specification for all authenticators. Instead it
5312 was generating a temporary error. It now behaves as specified.
5314 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5315 (the order specifies the preference for clients). The order is now AES256,
5316 AES128, 3DES, ARCFOUR128.
5318 31. Small patch to Sieve code - explicitly set From: when generating an
5321 32. Exim crashed if a remote delivery caused a very long error message to be
5322 recorded - for instance if somebody sent an entire SpamAssassin report back
5323 as a large number of 550 error lines. This bug was coincidentally fixed by
5324 increasing the size of one of Exim's internal buffers (big_buffer) that
5325 happened as part of the Exiscan merge. However, to be on the safe side, I
5326 have made the code more robust (and fixed the comments that describe what
5329 33. Some experimental protocols are using DNS PTR records for new purposes. The
5330 keys for these records are domain names, not reversed IP addresses. The
5331 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5332 leaves it alone. Component reversal etc. now happens only for IP addresses.
5335 34. The host_aton() function is supposed to be passed a string that is known
5336 to be a valid IP address. However, in the case of IPv6 addresses, it was
5337 not checking this. This is a hostage to fortune. Exim now panics and dies
5338 if the condition is not met. A case was found where this could be provoked
5339 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5340 components; fortuitously, this particular loophole had already been fixed
5341 by change 4.50/55 or 4.44/33 above.
5343 If there are any other similar loopholes, the new check in host_aton()
5344 itself should stop them being exploited. The report I received stated that
5345 data on the command line could provoke the exploit when Exim was running as
5346 exim, but did not say which command line option was involved. All I could
5347 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5348 running as the user.
5351 35. There was a buffer overflow vulnerability in the SPA authentication code
5352 (which came originally from the Samba project). I have added a test to the
5353 spa_base64_to_bits() function which I hope fixes it.
5356 36. The daemon start-up calls getloadavg() while still root for those OS that
5357 need the first call to be done as root, but it missed one case: when
5358 deliver_queue_load_max is set with deliver_drop_privilege. This is
5359 necessary for the benefit of the queue runner, because there is no re-exec
5360 when deliver_drop_privilege is set.
5362 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5363 was in use, was not putting the data itself into the right store pool;
5364 consequently, it could be overwritten for a subsequent message in the same
5365 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5368 38. Sometimes the final signoff response after QUIT could fail to get
5369 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5370 < 0 before doing a fflush(). This bug looks as though it goes back to the
5371 introduction of TLS in release 3.20, but "sometimes" must have been rare
5372 because the tests only now provoked it.
5378 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5379 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5380 Now it returns an integer. A number of calls were still expecting a T/F
5381 return. Fortuitously, in all cases, the tests worked in OK situations,
5382 which is the norm. However, things would have gone wrong on any write
5383 failures on the smtp file descriptor. This function is used when sending
5384 messages over SMTP and also when doing verify callouts.
5386 2. When Exim is called to do synchronous delivery of a locally submitted
5387 message (the -odf or -odi options), it no longer closes stderr before doing
5390 3. Implemented the mua_wrapper option.
5392 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5394 5. Implemented the functions header_remove(), header_testname(),
5395 header_add_at_position(), and receive_remove_recipient(), and exported them
5398 6. If an ACL "warn" statement specified the addition of headers, Exim already
5399 inserted X-ACL-Warn: at the start if there was no header name. However, it
5400 was not making this test for the second and subsequent header lines if
5401 there were newlines in the string. This meant that an invalid header could
5402 be inserted if Exim was badly configured.
5404 7. Allow an ACL "warn" statement to add header lines at the start or after all
5405 the Received: headers, as well as at the end.
5407 8. Added the rcpt_4xx retry error code.
5409 9. Added postmaster_mailfrom=xxx to callout verification option.
5411 10. Added mailfrom=xxxx to the callout verification option, for verify=
5414 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5415 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5417 12. Inserted some casts to stop certain compilers warning when using pointer
5418 differences as field lengths or precisions in printf-type calls (mostly
5419 affecting debugging statements).
5421 13. Added optional readline() support for -be (dynamically loaded).
5423 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5424 same clock tick as a message's arrival, so that its received time was the
5425 same as the "first fail" time on the retry record, and that message
5426 remained on the queue past the ultimate address timeout, every queue runner
5427 would try a delivery (because it was past the ultimate address timeout) but
5428 after another failure, the ultimate address timeout, which should have then
5429 bounced the address, did not kick in. This was a "< instead of <=" error;
5430 in most cases the first failure would have been in the next clock tick
5431 after the received time, and all would be well.
5433 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5434 being recognized when the domain list was tested by the match_domain
5435 condition in an expansion string.
5437 16. Added the ${str2b64: operator.
5439 17. Exim was always calling setrlimit() to set a large limit for the number of
5440 processes, without checking whether the existing limit was already
5441 adequate. (It did check for the limit on file descriptors.) Furthermore,
5442 errors from getrlimit() and setrlimit() were being ignored. Now they are
5443 logged to the main and panic logs, but Exim does carry on, to try to do its
5444 job under whatever limits there are.
5446 18. Imported PCRE 5.0.
5448 19. Trivial typo in log message " temporarily refused connection" (the leading
5451 20. If the log selector return_path_on_delivery was set and an address was
5452 redirected to /dev/null, the delivery process crashed because it assumed
5453 that a return path would always be set for a "successful" delivery. In this
5454 case, the whole delivery is bypassed as an optimization, and therefore no
5457 21. Internal re-arrangement: the function for sending a challenge and reading
5458 a response while authentication was assuming a zero-terminated challenge
5459 string. It's now changed to take a pointer and a length, to allow for
5460 binary data in such strings.
5462 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5464 23. Exim was not respecting finduser_retries when seeking the login of the
5465 uid under which it was called; it was always trying 10 times. (The default
5466 setting of finduser_retries is zero.) Also, it was sleeping after the final
5467 failure, which is pointless.
5469 24. Implemented tls_on_connect_ports.
5471 25. Implemented acl_smtp_predata.
5473 26. If the domain in control=submission is set empty, Exim assumes that the
5474 authenticated id is a complete email address when it generates From: or
5475 Sender: header lines.
5477 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5478 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5479 chown and chgrp in /bin and hostname in /usr/bin.
5481 28. Exim was keeping the "process log" file open after each use, just as it
5482 does for the main log. This opens the possibility of it remaining open for
5483 long periods when the USR1 signal hits a daemon. Occasional processlog
5484 errors were reported, that could have been caused by this. Anyway, it seems
5485 much more sensible not to leave this file open at all, so that is what now
5488 29. The long-running daemon process does not normally write to the log once it
5489 has entered its main loop, and it closes the log before doing so. This is
5490 so that log files can straightforwardly be renamed and moved. However,
5491 there are a couple of unusual error situations where the daemon does write
5492 log entries, and I had neglected to close the log afterwards.
5494 30. The text of an SMTP error response that was received during a remote
5495 delivery was being truncated at 512 bytes. This is too short for some of
5496 the long messages that one sometimes sees. I've increased the limit to
5499 31. It is now possible to make retry rules that apply only when a message has a
5500 specific sender, in particular, an empty sender.
5502 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5503 it possible to be selective about when SMTP synchronization is enforced.
5505 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5507 32. Implemented hosts_connection_nolog.
5509 33. Added an ACL for QUIT.
5511 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5514 35. Added mailbox_size and mailbox_filecount to appendfile.
5516 36. Added control = no_multiline_responses to ACLs.
5518 37. There was a bug in the logic of the code that waits for the clock to tick
5519 in the case where the clock went backwards by a substantial amount such
5520 that the microsecond fraction of "now" was more than the microsecond
5521 fraction of "then" (but the whole seconds number was less).
5523 38. Added support for the libradius Radius client library this is found on
5524 FreeBSD (previously only the radiusclient library was supported).
5530 1. When certain lookups returned multiple values in the form name=value, the
5531 quoting of the values was not always being done properly. Specifically:
5532 (a) If the value started with a double quote, but contained no whitespace,
5534 (b) If the value contained whitespace other than a space character (i.e.
5535 tabs or newlines or carriage returns) it was not quoted.
5536 This fix has been applied to the mysql and pgsql lookups by writing a
5537 separate quoting function and calling it from the lookup code. The fix
5538 should probably also be applied to nisplus, ibase and oracle lookups, but
5539 since I cannot test any of those, I have not disturbed their existing code.
5541 2. A hit in the callout cache for a specific address caused a log line with no
5542 reason for rejecting RCPT. Now it says "Previous (cached) callout
5543 verification failure".
5545 3. There was an off-by-one bug in the queryprogram router. An over-long
5546 return line was truncated at 256 instead of 255 characters, thereby
5547 overflowing its buffer with the terminating zero. As well as fixing this, I
5548 have increased the buffer size to 1024 (and made a note to document this).
5550 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5551 when Exim is waiting for an SMTP response from a remote server, Exim
5552 restarts its select() call on the socket, thereby resetting its timeout.
5553 This is not a problem when such interrupts are rare. Somebody set up a cron
5554 job to run exiwhat every 2 minutes, which is less than the normal select()
5555 timeout (5 or 10 minutes). This meant that the select() timeout never
5556 kicked in because it was always reset. I have fixed this by comparing the
5557 time when an interrupt arrives with the time at the start of the first call
5558 to select(). If more time than the timeout has elapsed, the interrupt is
5559 treated as a timeout.
5561 5. Some internal re-factoring in preparation for the addition of Sieve
5562 extensions (by MH). In particular, the "personal" test is moved to a
5563 separate function, and given an option for scanning Cc: and Bcc: (which is
5564 not set for Exim filters).
5566 6. When Exim created an email address using the login of the caller as the
5567 local part (e.g. when creating a From: or Sender: header line), it was not
5568 quoting the local part when it contained special characters such as @.
5570 7. Installed new OpenBSD configuration files.
5572 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5573 try to make them clearer.
5575 9. Callout options, other than the timeout value, were being ignored when
5576 verifying sender addresses in header lines. For example, when using
5578 verify = header_sender/callout=no_cache
5580 the cache was (incorrectly) being used.
5582 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5583 only the Cygwin environment.
5585 11. When return_path_on_delivery was set as a log selector, if different remote
5586 addresses in the same message used different return paths and parallel
5587 remote delivery occurred, the wrong values would sometimes be logged.
5588 (Whenever a remote delivery process finished, the return path value from
5589 the most recently started remote delivery process was logged.)
5591 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5592 lines when AUTH and/or TLS are in use. This is the "received protocol"
5593 field. Exim used to use "asmtp" for authenticated SMTP, without any
5594 indication (in the protocol name) for TLS use. Now it follows the RFC and
5595 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5596 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5597 names appear in log lines as well as in Received: header lines.
5599 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5600 extensions, and comparison tests, and to fix some bugs.
5602 14. Changes to the "personal" filter test:
5604 (1) The test was buggy in that it was just doing the equivalent of
5605 "contains" tests on header lines. For example, if a user's address was
5606 anne@some.where, the "personal" test would incorrectly be true for
5608 To: susanne@some.where
5610 This test is now done by extracting each address from the header in turn,
5611 and checking the entire address. Other tests that are part of "personal"
5612 are now done using regular expressions (for example, to check local parts
5613 of addresses in From: header lines).
5615 (2) The list of non-personal local parts in From: addresses has been
5616 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5617 taken from the Sieve specification recommendations.
5619 (3) If the message contains any header line starting with "List-" it is
5620 treated as non-personal.
5622 (4) The test for "circular" in the Subject: header line has been removed
5623 because it now seems ill-conceived.
5625 15. Minor typos in src/EDITME comments corrected.
5627 16. Installed latest exipick from John Jetmore.
5629 17. If headers_add on a router specified a text string that was too long for
5630 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5631 of string_sprintf() is now avoided.
5633 18. $message_body_size was not set (it was always zero) when running the DATA
5634 ACL and the local_scan() function.
5636 19. For the "mail" command in an Exim filter, no default was being set for
5637 the once_repeat time, causing a random time value to be used if "once" was
5638 specified. (If the value happened to be <= 0, no repeat happened.) The
5639 default is now 0s, meaning "never repeat". The "vacation" command was OK
5640 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5641 (I found it when inspecting the code).
5643 20. There is now an overall timeout for performing a callout verification. It
5644 defaults to 4 times the callout timeout, which applies to individual SMTP
5645 commands during the callout. The overall timeout applies when there is more
5646 than one host that can be tried. The timeout is checked before trying the
5647 next host. This prevents very long delays if there are a large number of
5648 hosts and all are timing out (e.g. when the network connections are timing
5649 out). The value of the overall timeout can be changed by specifying an
5650 additional sub-option for "callout", called "maxwait". For example:
5652 verify = sender/callout=5s,maxwait=20s
5654 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5655 to the end before writing, but this should make it even safer).
5657 22. Exim was forgetting that it had advertised PIPELINING for the second and
5658 subsequent messages on an SMTP connection. It was also not resetting its
5659 memory on STARTTLS and an internal HELO.
5661 23. When Exim logs an SMTP synchronization error within a session, it now
5662 records whether PIPELINING has been advertised or not.
5664 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5665 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5666 rather than long int.
5668 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5670 26. Added the never_mail option to autoreply.
5676 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5677 crash if the getsockname() call failed; this can happen if a connection is
5678 closed very soon after it is established. The problem was simply in the
5679 order in which certain operations were done, causing Exim to try to write
5680 to the SMTP stream before it had set up the file descriptor. The bug has
5681 been fixed by making things happen in the correct order.
5687 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5688 before the connection was closed, thus losing the rejection response.
5690 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5691 some early Solaris releases, but causes trouble in current releases where
5692 socklen_t is defined.
5694 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5697 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5700 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5701 that releasing the top of it at the end releases what was used for sub-
5702 expansions (unless the block got too big). However, discard this block if
5703 the first thing is a variable or header, so that we can use its block when
5704 it is dynamic (useful for very large $message_headers, for example).
5706 6. Lookups now cache *every* query, not just the most recent. A new, separate
5707 store pool is used for this. It can be recovered when all lookup caches are
5708 flushed. Lookups now release memory at the end of their result strings.
5709 This has involved some general refactoring of the lookup sources.
5711 7. Some code has been added to the store_xxx() functions to reduce the amount
5712 of flapping under certain conditions.
5714 8. log_incoming_interface used to affect only the <= reception log lines. Now
5715 it causes the local interface and port to be added to several more SMTP log
5716 lines, for example "SMTP connection from", and rejection lines.
5718 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5720 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5722 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5723 could be overwritten at the end of the current message (or the start of a
5724 new message if it was set in a HELO ACL). The value is now preserved for
5725 the duration of the SMTP connection.
5727 12. If a transport had a headers_rewrite setting, and a matching header line
5728 contained an unqualified address, that address was qualified, even if it
5729 did not match any rewriting rules. The underlying bug was that the values
5730 of the flags that permit the existence of unqualified sender and recipient
5731 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5732 non-local messages, and by -bnq for local messages) were not being
5733 preserved with the message after it was received.
5735 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5736 "next input=" as part of the text comprising the host identity instead of
5737 the correct text. The code was using the same buffer for two different
5738 strings. However, depending on which order the printing function evaluated
5739 its arguments, the bug did not always show up. Under Linux, for example, my
5740 test suite worked just fine.
5742 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5743 doesn't work with some older versions of Perl. It has been changed to "my",
5744 which in any case is probably the better facility to use.
5746 15. A really picky compiler found some instances of statements for creating
5747 error messages that either had too many or two few arguments for the format
5750 16. The size of the buffer for calls to the DNS resolver has been increased
5751 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5752 for addresses that have a lot of PTR records. This alleviates a problem; it
5753 does not fully solve it.
5755 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5756 buffer now truncates the list and logs the incident, which is the same
5757 action as happens when Exim is looking up a host name and its aliases.
5758 Previously in this situation something unpredictable would happen;
5759 sometimes it was "internal error: store_reset failed".
5761 18. If a server dropped the connection unexpectedly when an Exim client was
5762 using GnuTLS and trying to read a response, the client delivery process
5763 crashed while trying to generate an error log message.
5765 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5766 string, for example:
5768 warn message = H1: something\nH2: something
5770 the text was added as a single header line from Exim's point of view
5771 though it ended up OK in the delivered message. However, searching for the
5772 second and subsequent header lines using $h_h2: did not work. This has been
5773 fixed. Similarly, if a system filter added multiple headers in this way,
5774 the routers could not see them.
5776 20. Expanded the error message when iplsearch is called with an invalid key to
5777 suggest using net-iplsearch in a host list.
5779 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5780 ACLs are no longer actually imposed (and a message to that effect is
5783 22. If a "gecos" field in a passwd entry contained escaped characters, in
5784 particular, if it contained a \" sequence, Exim got it wrong when building
5785 a From: or a Sender: header from that name. A second bug also caused
5786 incorrect handling when an unquoted " was present following a character
5787 that needed quoting.
5789 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5790 was not being matched caselessly.
5792 24. Arranged for all hyphens in the exim.8 source to be escaped with
5795 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5796 properly. Recipient callout cache records were still being keyed to include
5797 the sender, even when use_sender was set false. This led to far more
5798 callouts that were necessary. The sender is no longer included in the key
5799 when use_sender is false.
5801 26. Added "control = submission" modifier to ACLs.
5803 27. Added the ${base62d: operator to decode base 62 numbers.
5805 28. dnsdb lookups can now access SRV records.
5807 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5808 the configuration file.
5810 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5811 (-v) mode. This makes the output for a verbose queue run more intelligible.
5813 31. Added a use_postmaster feature to recipient callouts.
5815 32. Added the $body_zerocount variable, containing the number of binary zero
5816 bytes in the message body.
5818 33. The time of last modification of the "new" subdirectory is now used as the
5819 "mailbox time last read" when there is a quota error for a maildir
5822 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5824 35. Added +ignore_unknown as a special item in host lists.
5826 36. Code for decoding IPv6 addresses in host lists is now included, even if
5827 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5828 address was recognized as an IP address, but was then not correctly decoded
5829 into binary, causing unexpected and incorrect effects when compared with
5836 1. Very minor rewording of debugging text in manualroute to say "list of
5837 hosts" instead of "hostlist".
5839 2. If verify=header_syntax was set, and a header line with an unqualified
5840 address (no domain) and a large number of spaces between the end of the
5841 name and the colon was received, the reception process suffered a buffer
5842 overflow, and (when I tested it) crashed. This was caused by some obsolete
5843 code that should have been removed. The fix is to remove it!
5845 3. When running in the test harness, delay a bit after writing a bounce
5846 message to get a bit more predictability in the log output.
5848 4. Added a call to search_tidyup() just before forking a reception process. In
5849 theory, someone could use a lookup in the expansion of smtp_accept_max_
5850 per_host which, without the tidyup, could leave open a database connection.
5852 5. Added the variables $recipient_data and $sender_data which get set from a
5853 lookup success in an ACL "recipients" or "senders" condition, or a router
5854 "senders" option, similar to $domain_data and $local_part_data.
5856 6. Moved the writing of debug_print from before to after the "senders" test
5859 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5860 problems for message scanning, either using a data ACL, or using
5861 local_scan() because the Received: header was not generated till after they
5862 were called (in order to set the time as the time of reception completion).
5863 I have revised the way this works. The header is now generated after the
5864 body is received, but before the ACL or local_scan() are called. After they
5865 are run, the timestamp in the header is updated.
5871 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5872 before starting a queue runner without re-exec. This happened only when
5873 deliver_drop_privilege was set or when the Exim user was set to root. The
5874 effect of the bug was that timeouts during subsequent deliveries caused
5875 crashes instead of being properly handled. The handler is now left at its
5876 default (and expected) setting.
5878 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5879 message, again when deliver_drop_privilege is set or Exim is run as root.
5880 The bug described in (1) was not present in this case, but the tidying up
5881 of the other signals was missing. I have made the two cases consistent.
5883 3. The ignore_target_hosts setting on a manualroute router was being ignored
5884 for hosts that were looked up using the /MX notation.
5886 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5889 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5890 operated on the sender address. After changing the $sender_address to <>
5891 for the sender address verify, Exim was re-instated it as the original
5892 (before rewriting) address, but remembering that it had rewritten it, so it
5893 wasn't rewriting it again. This bug also had the effect of breaking the
5894 sender address verification caching when the sender address was rewritten.
5896 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5897 This has been changed so that if the ip literal address matches
5898 ignore_target_hosts, the router declines.
5900 7. Added expansion conditions match_domain, match_address, and match_local_
5901 part (NOT match_host).
5903 8. The placeholder for the Received: header didn't have a length field set.
5905 9. Added code to Exim itself and to exim_lock to test for a specific race
5906 condition that could lead to file corruption when using MBX delivery. The
5907 issue is with the lockfile that is created in /tmp. If this file is removed
5908 after a process has opened it but before that process has acquired a lock,
5909 there is the potential for a second process to recreate the file and also
5910 acquire a lock. This could lead to two Exim processes writing to the file
5911 at the same time. The added code performs the same test as UW imapd; it
5912 checks after acquiring the lock that its file descriptor still refers to
5913 the same named file.
5915 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5916 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5919 11. Added the smtp_active_hostname option. If used, this will typically be made
5920 to depend on the incoming interface address. Because $interface_address is
5921 not set up until the daemon has forked a reception process, error responses
5922 that can happen earlier (such as "too many connections") no longer contain
5925 12. If an expansion in a condition on a "warn" statement fails because a lookup
5926 defers, the "warn" statement is abandoned, and the next ACL statement is
5927 processed. Previously this caused the whole ACL to be aborted.
5929 13. Added the iplsearch lookup type.
5931 14. Added ident_timeout as a log selector.
5933 15. Added tls_certificate_verified as a log selector.
5935 16. Added a global option tls_require_ciphers (compare the smtp transport
5936 option of the same name). This controls incoming TLS connections.
5938 17. I finally figured out how to make tls_require_ciphers do a similar thing
5939 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5940 before starting the TLS session.
5942 18. Tabs are now shown as \t in -bP output.
5944 19. If the log selector return_path_on_delivery was set, Exim crashed when
5945 bouncing a message because it had too many Received: header lines.
5947 20. If two routers both had headers_remove settings, and the first one included
5948 a superfluous trailing colon, the final name in the first list and the
5949 first name in the second list were incorrectly joined into one item (with a
5950 colon in the middle).
5956 1. Added -C and -D options to the exinext utility, mainly to make it easier
5957 to include in the automated testing, but these could be helpful when
5958 multiple configurations are in use.
5960 2. The exinext utility was not formatting the output nicely when there was
5961 an alternate port involved in the retry record key, nor when there was a
5962 message id as well (for retries that were specific to a specific message
5963 and a specific host). It was also confused by IPv6 addresses, because of
5964 the additional colons they contain. I have fixed the IPv4 problem, and
5965 patched it up to do a reasonable job for IPv6.
5967 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5968 delivery, the log line now contains "pipelined" if PIPELINING was used.
5970 4. An SMTP transport process used to panic and die if the bind() call to set
5971 an explicit outgoing interface failed. This has been changed; it is now
5972 treated in the same way as a connect() failure.
5974 5. A reference to $sender_host_name in the part of a conditional expansion
5975 that was being skipped was still causing a DNS lookup. This no longer
5978 6. The def: expansion condition was not recognizing references to header lines
5979 that used bh_ and bheader_.
5981 7. Added the _cache feature to named lists.
5983 8. The code for checking quota_filecount in the appendfile transport was
5984 allowing one more file than it should have been.
5986 9. For compatibility with Sendmail, the command line option
5994 and sets the incoming protocol and host name (for trusted callers). The
5995 host name and its colon can be omitted when only the protocol is to be set.
5996 Note the Exim already has two private options, -pd and -ps, that refer to
5997 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5998 "s", but I don't think that's a major issue.
6000 10. A number of refactoring changes to the code, none of which should affect
6003 (a) The number of logging options was getting close to filling up the
6004 32-bit word that was used as a bit map. I have split them into two classes:
6005 those that are passed in the argument to log_write(), and those that are
6006 only ever tested independently outside of that function. These are now in
6007 separate 32-bit words, so there is plenty of room for expansion again.
6008 There is no change in the user interface or the logging behaviour.
6010 (b) When building, for example, log lines, the code previously used a
6011 macro that called string_cat() twice, in order to add two strings. This is
6012 not really sufficiently general. Furthermore, there was one instance where
6013 it was actually wrong because one of the argument was used twice, and in
6014 one call a function was used. (As it happened, calling the function twice
6015 did not affect the overall behaviour.) The macro has been replaced by a
6016 function that can join an arbitrary number of extra strings onto a growing
6019 (c) The code for expansion conditions now uses a table and a binary chop
6020 instead of a serial search (which was left over from when there were very
6021 few conditions). Also, it now recognizes conditions like "pam" even when
6022 the relevant support is not compiled in: a suitably worded error message is
6023 given if an attempt is made to use such a condition.
6025 11. Added ${time_interval:xxxxx}.
6027 12. A bug was causing one of the ddress fields not to be passed back correctly
6028 from remote delivery subprocesses. The field in question was not being
6029 subsequently used, so this caused to problems in practice.
6031 13. Added new log selectors queue_time and deliver_time.
6033 14. Might have fixed a bug in maildirsizefile handling that threw up
6034 "unexpected character" debug warnings, and recalculated the data
6035 unnecessarily. In any case, I expanded the warning message to give more
6038 15. Added the message "Restricted characters in address" to the statements in
6039 the default ACL that block characters like @ and % in local parts.
6041 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6042 Three changes have been made:
6044 (a) There was a serious bug; a negative response to MAIL caused the whole
6045 recipient domain to be cached as invalid, thereby blocking all messages
6046 to all local parts at the same domain, from all senders. This bug has
6047 been fixed. The domain is no longer cached after a negative response to
6048 MAIL if the sender used is not empty.
6050 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6053 (c) A new callout option, "use_sender" has been added for people who want
6054 the modified behaviour.
6060 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6063 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6064 indeed breaks things for older releases.
6066 3. Added additional logging to the case where there is a problem reading data
6067 from a filter that is running in a subprocess using a pipe, in order to
6068 try to track down a specific problem.
6070 4. Testing facility fudge: when running in the test harness and attempting
6071 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6072 getting "No route to host". Convert this to a timeout.
6074 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6077 6. Some OS don't have socklen_t but use size_t instead. This affects the
6078 fifth argument of getsockopt() amongst other things. This is now
6079 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6080 can be set for individual OS. I have set it for SunOS5, OSF1, and
6081 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6082 some earlier ones do not.
6084 7. Change 4.30/15 was not doing the test caselessly.
6086 8. The standard form for an IPv6 address literal was being rejected by address
6087 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6088 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6089 this, as well as the form without the "IPv6" on the front (but only when
6090 address literals are enabled, of course).
6092 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6094 10. Exim crashed if a message with an empty sender address specified by -f
6095 encountered a router with an errors_to setting. This could be provoked only
6096 by a command such as
6100 where an empty string was supplied; "<>" did not hit this bug.
6102 11. Installed PCRE release 4.5.
6104 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6105 remained set. It is now erased.
6107 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6108 times from message ids (which are base 36 rather than the normal 62).
6110 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6111 were being counted as actual protocol errors, and logged if the log
6112 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6113 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6114 and DATA following a set of rejected RCPTs do not count as protocol errors.
6115 In other words, Exim assumes they were pipelined, though this may not
6116 actually be the case. Of course, in all cases the client gets an
6117 appropriate error code.
6119 15. If a lookup fails in an ACL condition, a message about the failure may
6120 be available; it is used if testing the ACL cannot continue, because most
6121 such messages specify what the cause of the deferral is. However, some
6122 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6123 that caused an old message to be retained and used if a later statement
6124 caused a defer, replacing the real cause of the deferral.
6126 16. If an IP address had so many PTR records that the DNS lookup buffer
6127 was not large enough to hold them, Exim could crash while trying to process
6128 the truncated data. It now detects and logs this case.
6130 17. Further to 4.21/58, another change has been made: if (and only if) the
6131 first line of a message (the first header line) ends with CRLF, a bare LF
6132 in a subsequent header line has a space inserted after it, so as not to
6133 terminate the header.
6135 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6136 unnecessarily, used atoi() instead of strtol(), and didn't check the
6137 termination when getting file sizes from file names by regex.
6139 19. Completely re-implemented the support for maildirsize files, in the light
6140 of a number of problems with the previous contributed implementation
6141 (4.30/29). In particular:
6143 . If the quota is zero, the maildirsize file is maintained, but no quota is
6146 . If the maildir directory does not exist, it is created before any attempt
6147 to write a maildirsize file.
6149 . The quota value in the file is just a cache; if the quota is changed in
6150 the transport, the new value overrides.
6152 . A regular expression is available for excluding directories from the
6155 20. The autoreply transport checks the characters in options that define the
6156 message's headers; it allows continued headers, but it was checking with
6157 isspace() after an embedded newline instead of explicitly looking for a
6160 21. If all the "regular" hosts to which an address was routed had passed their
6161 expiry times, and had not reached their retry times, the address was
6162 bounced, even if fallback hosts were defined. Now Exim should go on to try
6165 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6166 equivalent code in the SMTP transport. Some hosts send humungous responses
6167 to HELO/EHLO, more than 1024 it seems.
6169 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6170 gives compiler warnings in some environments. I've now done it "properly",
6173 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6174 (because of problems with the built-in one) was declared to return uschar *
6175 instead of char *, causing compiler failure.
6177 25. Fixed a file descriptor leak when processing alias/forward files.
6179 26. Fixed a minor format string issue in dbfn.c.
6181 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6183 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6184 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6187 29. When a sender address is verified, it is cached, to save repeating the test
6188 when there is more than one recipient in a message. However, when the
6189 verification involves a callout, it is possible for different callout
6190 options to be set for different recipients. It is too complicated to keep
6191 track of this in the cache, so now Exim always runs a verification when a
6192 callout is required, relying on the callout cache for the optimization.
6193 The overhead is duplication of the address routing, but this should not be
6196 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6197 to be verified with callout=postmaster, and the main callout worked but the
6198 postmaster check failed, the verification correctly failed. However, if a
6199 subsequent RCPT command asked for sender verification *without* the
6200 postmaster check, incorrect caching caused this verification also to fail,
6203 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6204 it was not caching the DNS options (qualify_single, search_parents) that
6205 were used when the lookup failed. A subsequent lookup with different
6206 options therefore always gave the same answer, though there were cases
6207 where it should not have. (Example: a "domains = !$mx_any" option on a
6208 dnslookup router: the "domains" option is always processed without any
6209 widening, but the router might have qualify_single set.) Now Exim uses the
6210 cached value only when the same options are set.
6212 32. Added John Jetmore's "exipick" utility to the distribution.
6214 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6215 than a timeout (e.g. a certificate is required, and is not provided), an
6216 Exim server now closes the connection immediately. Previously it waited for
6217 the client to close - but if the client is SSL, it seems that they each
6218 wait for each other, leading to a delay before one of them times out.
6220 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6221 maintained 0.8.x compatibility because I don't think many are using it, and
6222 it is clearly obsolete.
6224 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6227 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6228 client certificate was expired. A simple patch fixes this, though I don't
6229 understand the full logic of why the verify callback is called multiple
6232 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6233 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6234 which causes problems with some clients (such as the Certicom SSL Plus
6235 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6236 disables the coutermeasure allowing Eudora to connect."
6238 38. Exim was not checking that a write() to a log file succeeded. This could
6239 lead to Bad Things if a log got too big, in particular if it hit a file
6240 size limit. Exim now panics and dies if it cannot write to a log file, just
6241 as it does if it cannot open a log file.
6243 39. Modified OS/Makefile-Linux so that it now contains
6245 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6247 The two -D definitions ensure that Exim is compiled with large file
6248 support, which makes it possible to handle log files that are bigger than
6251 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6252 instance) a domain was checked against a named list that involved a lookup,
6253 causing $domain_data to be set, then another domain was checked against the
6254 same list, then the first domain was re-checked, the value of $domain_data
6255 after the final check could be wrong. In particular, if the second check
6256 failed, it could be set empty. This bug probably also applied to
6259 41. The strip_trailing_dot option was not being applied to the address given
6260 with the -f command-line option.
6262 42. The code for reading a message's header from the spool was incrementing
6263 $received_count, but never initializing it. This meant that the value was
6264 incorrect (doubled) while delivering a message in the same process in which
6265 it was received. In the most common configuration of Exim, this never
6266 happens - a fresh exec is done - but it can happen when
6267 deliver_drop_privilege is set.
6269 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6270 it now includes up to 150 characters of the unexpected data in the log
6273 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6274 and building data strings. The size of both of these buffers was 10 000
6275 bytes - far larger than anybody would *ever* want, thought I. Needless to
6276 say, somebody hit the limit. I have increased the maximum line length to
6277 20 000 and the maximum data length of concatenated lines to 100 000. I have
6278 also fixed two bugs, because there was no checking on these buffers. Tsk,
6279 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6280 buffer is too small.
6282 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6283 lsearch lookups. Now it does.
6285 46. When parsing a route_list item in a manualroute router, a fixed-length
6286 buffer was used for the list of hosts. I made this 1024 bytes long,
6287 thinking that nobody would ever have a list of hosts that long. Wrong.
6288 Somebody had a whole pile of complicated expansion conditions, and the
6289 string was silently truncated, leading to an expansion error. It turns out
6290 that it is easier to change to an unlimited length (owing to other changes
6291 that have happened since this code was originally written) than to build
6292 structure for giving a limitation error. The length of the item that
6293 expands into the list of hosts is now unlimited.
6295 47. The lsearch lookup could not handle data where the length of text line was
6296 more than 4095 characters. Such lines were truncated, leading to shortened
6297 data being returned. It should now handle lines of any length.
6299 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6300 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6303 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6304 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6305 no longer happens in comment lines. A list of replacements is now placed
6306 at the head of all of the source files, except those whose only change is
6307 to replace PERL_COMMAND in the very first #! line.
6309 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6310 messages on the queue, with a bottom-up merge sort, using code contributed
6311 by Michael Haardt. This should make operations like -bp somewhat faster on
6312 large queues. It won't affect queue runners, except when queue_run_in_order
6315 51. Installed eximstats 1.31 in the distribution.
6317 52. Added support for SRV lookups to the dnslookup router.
6319 53. If an ACL referred to $message_body or $message_body_end, the value was not
6320 reset for any messages that followed in the same SMTP session.
6322 54. The store-handling optimization for building very long strings was not
6323 differentiating between the different store pools. I don't think this
6324 actually made any difference in practice, but I've tidied it.
6326 55. While running the routers to verify a sender address, $sender_address
6327 was still set to the sender address. This is wrong, because when routing to
6328 send a bounce to the sender, it would be empty. Therefore, I have changed
6329 it so that, while verifying a sender address, $sender_address is set to <>.
6330 (There is no change to what happens when verifying a recipient address.)
6332 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6333 target A or AAAA records (if not already returned) without resetting the
6334 qualify_single or search_parents options of the DNS resolver. These are
6335 inappropriate in this case because the targets of MX and SRV records must
6336 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6337 target that, when qualified, matched something in the local domain. These
6338 two options are now turned off when doing these lookups.
6340 57. It seems that at least some releases of Reiserfs (which does not have the
6341 concept of a fixed number of inodes) returns zero and not -1 for the
6342 number of available inodes. This interacted badly with check_spool_inodes,
6343 which assumed that -1 was the "no such thing" setting. What I have done is
6344 to check that the total number of inodes is greater than zero before doing
6345 the test of how many are available.
6347 58. When a "warn" ACL statement has a log_message modifier, the message is
6348 remembered, and not repeated. This is to avoid a lot of repetition when a
6349 message has many recipients that cause the same warning to be written.
6350 However, Exim was preserving the list of already written lines for an
6351 entire SMTP session, which doesn't seem right. The memory is now reset if a
6352 new message is started.
6354 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6355 debugging output unless log_rewrite was also set.
6357 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6358 of (int)(handle) when we know that handle contains (void *)(-1).
6360 61. The Exim daemon panic-logs an error return when it closes the incoming
6361 connection. However "connection reset by peer" seems to be common, and
6362 isn't really an error worthy of noting specially, so that particular error
6365 62. When Exim is trying to find all the local interfaces, it used to panic and
6366 die if the ioctl to get the interface flags failed. However, it seems that
6367 on at least one OS (Solaris 9) it is possible to have an interface that is
6368 included in the list of interfaces, but for which you get a failure error
6369 for this call. This happens when the interface is not "plumbed" into a
6370 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6371 failure of the "get flags" call assumes that the interface is down.
6373 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6374 makes life easier for people who are doing arithmetic on fields extracted
6375 from dates, where you often get leading zeros that should not be
6376 interpreted as octal.
6378 64. Added qualify_domain to the redirect router, to override the global
6381 65. If a pathologically long header line contained very many addresses (the
6382 report of this problem mentioned 10 000) and each of them was rewritten,
6383 Exim could use up a very large amount of memory. (It kept on making new
6384 copies of the header line as it rewrote, and never released the old ones.)
6385 At the expense of a bit more processing, the header rewriting function has
6386 been changed so that it no longer eats memory in this way.
6388 66. The generation of the Received: header has been moved from the time that a
6389 message starts to be received, to the time that it finishes. The timestamp
6390 in the Received: header should now be very close to that of the <= log
6391 line. There are two side-effects of this change:
6393 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6394 logged header lines no longer include the local Received: line, because
6395 it has not yet been created. The same applies to a copy of the message
6396 that is returned to a non-SMTP sender when a message is rejected.
6398 (b) When a filter file is tested using -bf, no additional Received: header
6399 is added to the test message. After some thought, I decided that this
6402 This change does not affect the value of $received_for. It is still set
6403 after address rewriting, but before local_scan() is called.
6405 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6407 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6408 gave an unhelpful panic error message, and a defer error. I have managed to
6409 change this behaviour so that it now rejects any supplied certificate,
6410 which seems right, as the list of acceptable certificates is empty.
6412 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6413 gave an unhelpful defer error. I have not managed to make this reject any
6414 supplied certificates, but the error message it gives is "no certificate
6415 supplied", which is not helpful.
6417 70. exigrep's output now also includes lines that are not associated with any
6418 message, but which match the given pattern. Implemented by a patch from
6419 Martin Sluka, which also tidied up the Perl a bit.
6421 71. Recipient callout verification, like sender verification, was using <> in
6422 the MAIL FROM command. This isn't really the right thing, since the actual
6423 sender may affect whether the remote host accepts the recipient or not. I
6424 have changed it to use the actual sender in the callout; this means that
6425 the cache record is now keyed on a recipient/sender pair, not just the
6426 recipient address. There doesn't seem to be a real danger of callout loops,
6427 since a callout by the remote host to check the sender would use <>.
6428 [SEE ABOVE: changed after hitting problems.]
6430 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6431 temporary errors. However, in the case of such a code being given after
6432 the end of a data transmission (i.e. after ".") Exim was failing to write
6433 a retry record for the message. (Yes, there was some broken host that was
6434 actually sending 8xx at this point.)
6436 73. An unknown lookup type in a host list could cause Exim to panic-die when
6437 the list was checked. (An example that provoked this was putting <; in the
6438 middle of a list instead of at the start.) If this happened during a DATA
6439 ACL check, a -D file could be left lying around. This kind of configuration
6440 error no longer causes Exim to die; instead it causes a defer error. The
6441 incident is still logged to the main and panic logs.
6443 74. Buglet left over from Exim 3 conversion. The message "too many messages
6444 in one connection" was written to the rejectlog but not the mainlog, except
6445 when address rewriting (yes!) was being logged.
6447 75. Added write_rejectlog option.
6449 76. When a system filter was run not as root (that is, when system_filter_user
6450 was set), the values of the $n variables were not being returned to the
6451 main process; thus, they were not subsequently available in the $sn
6454 77. Added +return_path_on_delivery log selector.
6456 78. A connection timeout was being treated differently from recipients deferred
6457 when testing hosts_max_try with a message that was older than the host's
6458 retry timeout. (The host should not be counted, thus allowing all hosts to
6459 be tried at least once before bouncing.) This may have been the cause of an
6460 occasionally reported bug whereby a message would remain on the queue
6461 longer than the retry timeout, but would be bounced if a delivery was
6462 forced. I say "may" because I never totally pinned down the problem;
6463 setting up timeout/retry tests is difficult. See also the next item.
6465 79. The ultimate address timeout was not being applied to errors that involved
6466 a combination of host plus message (for example, a timeout on a MAIL
6467 command). When an address resolved to a number of possible hosts, and they
6468 were not all tried for each delivery (e.g. because of hosts_max_try), a
6469 message could remain on the queue longer than the retry timeout.
6471 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6474 81. Fixed an obscure SMTP outgoing bug which required at least the following
6475 conditions: (a) there was another message waiting for the same server;
6476 (b) the server returned 5xx to all RCPT commands in the first message so
6477 that the message was not completed; (c) the server dropped the connection
6478 or gave a negative response to the RSET that Exim sends to abort the
6479 transaction. The observed case was a dropped connection after DATA that had
6480 been sent in pipelining mode. That is, the server had advertised PIPELINING
6481 but was not implementing it correctly. The effect of the bug was incorrect
6482 behaviour, such as trying another host, and this could lead to a crash.
6488 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6489 and daemon.c were passed as pointers to ints; they should have been
6490 pointers to socklen_t variables (which are typically unsigned ints).
6492 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6495 3. Fixed a really odd bug that affected only the testing scheme; patching a
6496 certain fixed string in the binary changed the value of another string that
6497 happened to be identical to the end of the original first string.
6499 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6500 name", it returns that address as the IP address. On some operating
6501 systems (e.g. Solaris), it also passes back the IP address string as the
6502 "host name". However, on others (e.g. Linux), it passes back an empty
6503 string. Exim wasn't checking for this, and was changing the host name to an
6504 empty string, assuming it had been canonicalized.
6506 5. Although rare, it is permitted to have more than one PTR record for a given
6507 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6508 all the names associated with an address, because they do in Solaris.
6509 However, it seems that they do not in Linux for data that comes from the
6510 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6511 I found this out when I moved to a new Linux workstation and tried to run
6512 the Exim test suite.
6514 To get round this problem I have changed the code so that it now does its
6515 own call to the DNS to look up PTR records when searching for a host name.
6516 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6517 addresses that are only in /etc/hosts are still found.
6519 This behaviour is, however, controlled by an option called host_lookup_
6520 order, which defaults to "bydns:byaddr". If people want to use the other
6521 order, or indeed, just use one or the other means of lookup, they can
6522 specify it in this variable.
6524 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6525 some operating systems, this comes back from gethostbyaddr() as an empty
6526 string, and this is what Exim used to test for. However, it seems that in
6527 other systems, "." is yielded. Exim now tests for this case too.
6529 7. The values of check_spool_space and check_log_space are now held internally
6530 as a number of kilobytes instead of an absolute number of bytes. If a
6531 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6532 kilobyte. This means that much larger values can be stored.
6534 8. Exim monitor: an attempt to get the action menu when not actually pointing
6535 at a message produces an empty menu entitled "No message selected". This
6536 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6537 no entries in it ("Shell widget menu has zero width and/or height"). So I
6538 have added a single, blank menu entry in this case.
6540 9. Added ${quote_local_part.
6542 10. MIME decoding is now applied to the contents of Subject: header lines when
6545 11. Now that a reference to $sender_host_address automatically causes a reverse
6546 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6547 host lookup before query-style lookups in lists that might use this
6548 variable. This has therefore been abolished, and the "net-" prefix is no
6549 longer necessary for query-style lookups.
6551 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6552 have been a typo for LFLAGS, so it has been changed.
6554 13. The install script calls Exim with "-C /dev/null" in order to find the
6555 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6556 to be output. However, since Exim outputs its version number before the
6557 error, it didn't break the script. It just looked ugly. I fixed this by
6558 always allowing "-C /dev/null" if the caller is root.
6560 14. Ignore overlarge ACL variable number when reading spool file - insurance
6561 against a later release with more variables having written the file.
6563 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6564 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6565 this, as well as the form without the "IPv6" on the front.
6567 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6568 OS/Makefile-Darwin file.
6570 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6571 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6573 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6574 variable. However, some OS use ints for inodes. I've added cast to long int
6575 to get rid of the compiler warning.
6577 19. I had forgotten to lock out "/../" in configuration file names when
6578 ALT_CONFIG_PREFIX was set.
6580 20. Routers used for verification do not need to specify transports. However,
6581 if such a router generated a host list, and callout was configured, Exim
6582 crashed, because it could not find a port number from the (non-existent)
6583 transport. It now assumes port 25 in this circumstance.
6585 21. Added the -t option to exigrep.
6587 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6588 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6589 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6590 them is set, LOOKUP_LSEARCH is forced.
6592 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6594 24. Added sender and host information to the "rejected by local_scan()" log
6595 line; previously there was no indication of these.
6597 25. Added .include_if_exists.
6599 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6600 Linux. It turns out that not all file systems support this. Apparently some
6601 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6602 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6603 not supported on the file descriptor, is now ignored when Exim is trying to
6604 sync a directory. This applies only to Linux.
6606 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6608 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6609 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6612 29. Added support for maildirsize files from supplied patch (modified a bit).
6614 30. The use of :fail: followed by an empty string could lead Exim to respond to
6615 sender verification failures with (e.g.):
6617 550 Verification failed for <xxx>
6618 550 Sender verify failed
6620 where the first response line was missing the '-' that indicates it is not
6621 the final line of the response.
6623 31. The loop for finding the name of the user that called Exim had a hardwired
6624 limit of 10; it now uses the value of finduser_retries, which is used for
6625 all other user lookups.
6627 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6630 33. Exim was neglecting to zero errno before one call of strtol() when
6631 expanding a string and expecting an integer value. On some systems this
6632 resulted in spurious "integer overflow" errors. Also, it was casting the
6633 result into an int without checking.
6635 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6636 did not work. The code looks as if it has *never* worked, though it appears
6637 to have been documented since at least release 1.62. I have made it work.
6639 35. The "timeout_DNS" error in retry rules, also documented since at least
6640 1.62, also never worked. As it isn't clear exactly what this means, and
6641 clearly it isn't a major issue, I have abolished the feature by treating it
6642 as "timeout", and writing a warning to the main and panic logs.
6644 36. The display of retry rules for -brt wasn't always showing the error code
6647 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6648 timeout_connect_A, timeout_connect_MX.
6650 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6651 to the empty sender.
6653 39. The daemon was not analysing the content of -oX till after it had closed
6654 stderr and disconnected from the controlling terminal. This meant that any
6655 syntax errors were only noted on the panic log, and the return code from
6656 the command was 0. By re-arranging the code a little, I've made the
6657 decoding happen first, so such errors now appear on stderr, and the return
6658 code is 1. However, the actual setting up of the sockets still happens in
6659 the disconnected process, so errors there are still only recorded on the
6662 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6663 connections (as happens on some IP stacks) was logged at start up time as
6664 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6665 it from "IPv6 and IPv4", which means that two separate sockets are being
6668 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6669 says whether AF_INET or AF_INET6 was passed as an argument.
6671 42. Exiwhat output was messed up when time zones were included in log
6674 43. Exiwhat now gives more information about the daemon's listening ports,
6675 and whether -tls-on-connect was used.
6677 44. The "port" option of the smtp transport is now expanded.
6679 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6680 silently ignored. Now an error message is written to the main and panic
6683 46. There's a new ACL modifier called "logwrite" which writes to a log file
6684 as soon as it is encountered.
6686 47. Added $local_user_uid and $local_user_gid at routing time.
6688 48. Exim crashed when trying to verify a sender address that was being
6691 49. Exim was recognizing only a space character after ".include". It now also
6692 recognizes a tab character.
6694 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6695 extracting the relevant information from the specification. The man page no
6696 longer contains scrambled data for the -d option, and I've added a section
6697 at the front about calling Exim under different names.
6699 51. Added "extra_headers" argument to the "mail" command in filter files.
6701 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6704 53. Installed eximstats 1.29.
6706 54. Added transport_filter_timeout as a generic transport option.
6708 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6709 Cc: header lines. This was required by RFC 822, but it not required by RFC
6712 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6713 incoming messages that did not have them. Now it does so only if the
6714 message originates locally, that is, if there is no associated remote host
6715 address. When Resent- header lines are present, this applies to the Resent-
6716 lines rather than the non-Resent- lines.
6718 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6719 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6721 58. Messages for configuration errors now include the name of the main
6722 configuration file - useful now that there may be more than one file in a
6723 list (.included file names were always shown).
6725 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6726 for those rare installations that do not start the daemon as root or run it
6727 setuid root. I've cut out the call to initgroups() if the daemon is not
6730 60. The Exim user and group can now be bound into the binary as text strings
6731 that are looked up at the start of Exim's processing.
6733 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6735 62. Added $mailstore_basename variable.
6737 63. Installed patch to sieve.c from Michael Haardt.
6739 64. When Exim failed to open the panic log after failing to open the main log,
6740 the original message it was trying to log was written to stderr and debug
6741 output, but if they were not available (the usual case in production), it
6742 was lost. Now it is written to syslog before the two lines that record the
6743 failures to open the logs.
6745 65. Users' Exim filters run in subprocesses under the user's uid. It is
6746 possible for a "deliver" command or an alias in a "personal" command to
6747 provoke an address rewrite. If logging of address rewriting is configured,
6748 this fails because the process is not running as root or exim. There may be
6749 a better way of dealing with this, but for the moment (because 4.30 needs
6750 to be released), I have disabled address rewrite logging when running a
6751 filter in a non-root, non-exim process.
6757 1. The buildconfig auxiliary program wasn't quoting the value set for
6758 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6759 not defined. This bug was masked in 4.22 by the effect that was fixed in
6762 2. Some messages that were rejected after a message id was allocated were
6763 shown as "incomplete" by exigrep. It no longer does this for messages that
6764 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6766 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6767 have allow_domain_literals set, the ID did not get logged in the <= line.
6768 Domain literals are now always recognized in Message-ID: header lines.
6770 4. The first argument for a ${extract expansion item is the key name or field
6771 number. Leading and trailing spaces in this item were not being ignored,
6772 causing some misleading effects.
6774 5. When deliver_drop_privilege was set, single queue runner processes started
6775 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6776 same command in the process it spins off) were not dropping privilege.
6778 6. When the daemon running as "exim" started a queue runner, it always
6779 re-executed Exim in the spun-off process. This is a waste of effort when
6780 deliver_drop_privilege is set. The new process now just calls the
6781 queue-runner function directly.
6787 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6790 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6791 ignored. Though the use of -oP was forcing the writing of a pid file, it
6792 was always written to the default place.
6794 3. If the message "no IP address found for host xxxx" is generated during
6795 incoming verification, it is now followed by identification of the incoming
6796 connection (so you can more easily find what provoked it).
6798 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6800 5. Added some features to "harden" Exim a bit more against certain attacks:
6802 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6803 be put in Local/Makefile. This is like the never_users runtime option,
6804 but it cannot be overridden. The default setting is "root".
6806 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6807 prefix string with which any file named in a -C command line option
6810 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6811 is retained for -C and -D only if the caller of Exim is root. Without
6812 it, the exim user may also use -C and -D and retain privilege.
6814 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6815 command line option is disabled.
6817 6. Macro names set by the -D option must start with an upper case letter, just
6818 like macro names defined in the configuration file.
6820 7. Added "dereference=" facility to LDAP.
6822 8. Two instances of the typo "uknown" in the source files are fixed.
6824 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6825 the Configure-Makefile script screwed up while processing it.
6827 10. Incorporated PCRE 4.4.
6829 11. The SMTP synchronization check was not operating right at the start of an
6830 SMTP session. For example, it could not catch a HELO sent before the client
6831 waited for the greeting. There is now a check for outstanding input at the
6832 point when the greeting is written. Because of the duplex, asynchronous
6833 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6834 way, but not yet received, when the check is performed.
6836 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6837 on TCP/IP sockets, because this apparently causes some broken clients to
6840 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6841 unchanged) from the Cygwin maintainer.
6843 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6844 was supported instead of testing for mbx. Effectively a typo.
6846 15. The spa authenticator server code was not checking that the input it
6847 received was valid base64.
6849 16. The debug output line for the "set" modifier in ACLs was not showing the
6850 name of the variable that was being set.
6852 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6854 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6855 lookup on its own. Something else was needed to trigger the lookup. For
6856 example, a match in host_lookup or the need for a host name in a host list.
6857 Now, if $sender_host_name is referenced and the host name has not yet been
6858 looked up, a lookup is performed. If the lookup fails, the variable remains
6859 empty, and $host_lookup_failed is set to "1".
6861 19. Added "eqi" as a case-independent comparison operator.
6863 20. The saslauthd authentication condition could segfault if neither service
6864 nor realm was specified.
6866 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6867 error message that was logged was misleading, and incoming SMTP
6868 connections were dropped. The message is now more accurate, and temporary
6869 errors are given to SMTP connections.
6871 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6872 (except RSET) with a 421 error, until QUIT is received. However, it was
6873 failing to send a response to QUIT.
6875 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6876 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6877 ACL is now run after the helo_try_verify_hosts code.
6879 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6880 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6881 case-independent, so other case variants are also recognized). Apparently
6882 some systems use these upper case variants.
6884 25. If more than two messages were waiting for the same host, and a transport
6885 filter was specified for the transport, Exim sent two messages over the
6886 same TCP/IP connection, and then failed with "socket operation on non-
6887 socket" when it tried to send the third.
6889 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6891 27. The extern definition of crypt16() in expand.c was not being excluded when
6892 the OS had its own crypt16() function.
6894 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6895 as a preferred synonym for return_size_limit, both as an option and as an
6898 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6900 30. Changed the default configuration ACL to relax the local part checking rule
6901 for addresses that are not in any local domains. For these addresses,
6902 slashes and pipe symbols are allowed within local parts, but the sequence
6903 /../ is explicitly forbidden.
6905 31. SPA server authentication was not clearing the challenge buffer before
6908 32. log_message in a "warn" ACL statement was writing to the reject log as
6909 well as to the main log, which contradicts the documentation and doesn't
6910 seem right (because no rejection is happening). So I have stopped it.
6912 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6913 However, I am unable to do any testing of this.
6915 34. Fixed an infelicity in the appendfile transport. When checking directories
6916 for a mailbox, to see if any needed to be created, it was accidentally
6917 using path names with one or more superfluous leading slashes; tracing
6918 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6920 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6921 contents are added to the log line that is written for every discarded
6922 recipient. (Previously a log_message setting was ignored.)
6924 36. The ${quote: operator now quotes the string if it is empty.
6926 37. The install script runs exim in order to find its version number. If for
6927 some reason other than non-existence or emptiness, which it checks, it
6928 could not run './exim', it was installing it with an empty version number,
6929 i.e. as "exim-". This error state is now caught, and the installation is
6932 38. An argument was missing from the function that creates an error message
6933 when Exim fails to connect to the socket for saslauthd authentication.
6934 This could cause Exim to crash, or give a corrupted message.
6936 39. Added isip, isip4, and isip6 to ${if conditions.
6938 40. The ACL variables $acl_xx are now saved with the message, and can be
6939 accessed later in routers, transports, and filters.
6941 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6942 strings in the file are not string-expanded.
6944 42. If a MAIL command specified a SIZE value that was too large to fit into an
6945 int variable, the check against message_size_limit failed. Such values are
6946 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6947 day this will have to be increased, but I don't think I want to be around
6948 when emails are that large.
6955 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6956 iconv() is not standard in FreeBSD.
6958 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6959 IPv6 enabled. The observed symptom was a segmentation fault on return from
6960 the function os_common_find_running_interfaces() in src/os.c.
6962 3. In the check_special_case() function in daemon.c I had used "errno" as an
6963 argument name, which causes warnings on some systems. This was basically a
6964 typo, since it was named "eno" in the comments!
6966 4. The code that waits for the clock to tick (at a resolution of some fraction
6967 of a second) so as to ensure message-id uniqueness was always waiting for
6968 at least one whole tick, when it could have waited for less. [This is
6969 almost certainly not relevant at current processor speeds, where it is
6970 unlikely to ever wait at all. But we try to future-proof.]
6972 5. The function that sleeps for a time interval that includes fractions of a
6973 second contained a race. It did not block SIGALRM between setting the
6974 timer, and suspending (a couple of lines later). If the interval was short
6975 and the sigsuspend() was delayed until after it had expired, the suspension
6976 never ended. On busy systems this could lead to processes getting stuck for
6979 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6980 process, before it forks any delivery processes. The open lookup caching
6981 mechanism meant that the open file or database connection was passed into
6982 the delivery process. The problem was that delivery processes always tidy
6983 up cached lookup data. This could cause a problem for the next delivery
6984 process started by the queue runner, because the external queue runner
6985 process does not know about the closure. So the next delivery process
6986 still has data in the lookup cache. In the case of a file lookup, there was
6987 no problem because closing a file descriptor in a subprocess doesn't affect
6988 the parent. However, if the lookup was caching a connection to a database,
6989 the connection was closed, and the second delivery process was likely to
6990 see errors such as "PGSQL: query failed: server closed the connection
6991 unexpectedly". The problem has been fixed by closing all cached lookups
6992 in a queue runner before running a delivery process.
6994 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6995 seem to have the "const" qualifier which it has on other OS. I've
6998 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6999 *of the same type* (client or server) with the same public name that an
7000 error should be diagnosed.
7002 9. When Exim looked up a host name for an IP address, but failed to find the
7003 original IP address when looking up the host name (a safety check), it
7004 output the message "<ip address> does not match any IP for NULL", which was
7005 confusing, to say the least. The bug was that the host name should have
7006 appeared instead of "NULL".
7008 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7009 user that is built into the binary, and the -C or -D options is used, root
7010 privilege is dropped before the configuration file is read. In addition,
7011 logging is switched to stderr instead of the normal log files. If the
7012 configuration then re-defines the Exim user, the unprivileged environment
7013 is probably not what is expected, so Exim logs a panic warning message (but
7016 However, if deliver_drop_privilege is set, the unprivileged state may well
7017 be exactly what is intended, so the warning has been cut out in that case,
7018 and Exim is allowed to try to write to its normal log files.
7024 1. smtp_return_error_details was not giving details for temporary sender
7025 or receiver verification errors.
7027 2. Diagnose a configuration error if two authenticators have the same public
7030 3. Exim used not to create the message log file for a message until the first
7031 delivery attempt. This could be confusing when incoming messages were held
7032 for policy or load reasons. The message log file is now created at the time
7033 the message is received, and an initial "Received" line is written to it.
7035 4. The automatically generated man page for command line options had a minor
7036 bug that caused no ill effects; however, a more serious problem was that
7037 the procedure for building the man page automatically didn't always
7038 operate. Consequently, release 4.20 contains an out-of-date version. This
7039 shouldn't happen again.
7041 5. When building Exim with embedded Perl support, the script that builds the
7042 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7043 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7045 6. The freeze_tell option was not being used for messages that were frozen on
7046 arrival, either by an ACL or by local_scan().
7048 7. Added the smtp_incomplete_transaction log selector.
7050 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7051 was accepting AUTH without a new EHLO.
7053 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7054 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7057 10. Logging of TCP/IP connections (when configured) now happens in the main
7058 daemon process instead of the child process, so that the TCP/IP connection
7059 count is more accurate (but it can never be perfect).
7061 11. The use of "drop" in a nested ACL was not being handled correctly in the
7062 outer ACL. Now, if condition failure induced by the nested "drop" causes
7063 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7064 or "require"), the connection is dropped.
7066 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7067 that yield "discard" can now be used with an "accept" or a "discard" verb,
7068 but an error is generated for any others (because I can't see a useful way
7069 to define what should happen).
7071 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7072 are now processed in the same way as lines in the Exim configuration file.
7073 In particular, continuation lines are supported.
7075 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7077 15. Added -ti meaning -t -i.
7079 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7080 domains, and warn by logging if others are found.
7082 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7083 returned from GIFCONF when Exim is trying to find the list of interfaces on
7084 a host. The code in os.c has been modified to copy each ifreq to an aligned
7085 structure in all cases.
7087 Also, in some cases, the returned ifreq's were being copied to a 'struct
7088 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7089 means the last couple of bytes of an IPv6 address could be chopped if the
7090 ifreq contained only a normal sockaddr (14 bytes storage).
7092 18. Named domain lists were not supported in the hosts_treat_as_local option.
7093 An entry such as +xxxx was not recognized, and was treated as a literal
7096 19. Ensure that header lines added by a DATA ACL are included in the reject log
7097 if the ACL subsequently rejects the message.
7099 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7100 MD5 (which is deprecated).
7102 21. When testing a filter file using -bf, Exim was writing a message when it
7103 took the sender from a "From " line in the message, but it was not doing so
7104 when it took $return_path from a Return-Path: header line. It now does.
7106 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7107 with a valid header line field name (a series of printing characters
7108 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7110 23. Changed "disc" in the source to "disk" to conform to the documentation and
7111 the book and for uniformity.
7113 24. Ignore Sendmail's -Ooption=value command line item.
7115 25. When execve() failed while trying to run a command in a pipe transport,
7116 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7117 could be confused with a return value of 69 from the command itself. This
7118 has been changed to 127, the value the shell returns if it is asked to run
7119 a non-existent command. The wording for the related log line suggests a
7120 non-existent command as the problem.
7122 26. If received_header_text expands to an empty string, do not add a Received:
7123 header line to the message. (Well, it adds a token one on the spool, but
7124 marks it "old" so that it doesn't get used or transmitted.)
7126 27. Installed eximstats 1.28 (addition of -nt option).
7128 28. There was no check for failure on the call to getsockname() in the daemon
7129 code. This can fail if there is a shortage of resources on the system, with
7130 ENOMEM, for example. A temporary error is now given on failure.
7132 29. Contrary to the C standard, it seems that in some environments, the
7133 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7134 program. Exim now does this explicitly; it affects the formatting of
7135 timestamps using strftime().
7137 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7138 complaints. I've now initialized all the variables, to avoid this.
7140 32. Header lines added by a system filter were not being "seen" during
7141 transport-time rewrites.
7143 33. The info_callback() function passed to OpenSSL is set up with type void
7144 (*)(SSL *, int, int), as described somewhere. However, when calling the
7145 function (actually a macro) that sets it up, the type void(*)() is
7146 expected. I've put in a cast to prevent warnings from picky compilers.
7148 34. If a DNS black list lookup found a CNAME record, but there were no A
7149 records associated with the domain it pointed at, Exim crashed.
7151 35. If a DNS black list lookup returned more than one A record, Exim ignored
7152 all but the first. It now scans all returned addresses if a particular IP
7153 value is being sought. In this situation, the contents of the
7154 $dnslist_value variable are a list of all the addresses, separated by a
7157 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7158 to accept a host name and all its aliases if the forward lookup for any of
7159 them yielded the IP address of the incoming connection. Now it accepts only
7160 those names whose forward lookup yields the correct IP address. Any other
7161 names are discarded. This closes a loophole whereby a rogue DNS
7162 administrator could create reverse DNS records to break through a
7163 wildcarded host restriction in an ACL.
7165 37. If a user filter or a system filter that ran in a subprocess used any of
7166 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7167 the wrong values were passed to the pipe command ($thisaddress had the
7168 value of $0, $0 had the value of $1, etc). This bug was introduced by
7169 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7171 38. Improved the line breaking for long SMTP error messages from ACLs.
7172 Previously, if there was no break point between 40 and 75 characters, Exim
7173 left the rest of the message alone. Two changes have been made: (a) I've
7174 reduced the minimum length to 35 characters; (b) if it can't find a break
7175 point between 35 and 75 characters, it looks ahead and uses the first one
7176 that it finds. This may give the occasional overlong line, but at least the
7177 remaining text gets split now.
7179 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7180 file descriptors might be low, and that setting 1000 would always raise it.
7181 It turns out that in some environments, the limit is already over 1000 and
7182 that lowering it causes trouble. So now Exim takes care not to decrease it.
7184 40. When delivering a message, the value of $return_path is set to $sender_
7185 address at the start of routing (routers may change the value). By an
7186 oversight, this default was not being set up when an address was tested by
7187 -bt or -bv, which affected the outcome if any router or filter referred to
7190 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7191 log only when "message" or "log_message" are set. However, if one of the
7192 conditions was an address verification, or a call to a nested ACL, the
7193 messages generated by the underlying test were being passed through. This
7194 no longer happens. The underlying message is available in $acl_verify_
7195 message for both "message" and "log_message" expansions, so it can be
7196 passed through if needed.
7198 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7199 new expansion $bh_ to give the encoded byte string without charset
7200 translation. Translation happens only if iconv() is available; HAVE_ICONV
7201 indicates this at build time. HEADERS_CHARSET gives the charset to
7202 translate to; headers_charset can change it in the configuration, and
7203 "headers charset" can change it in an individual filter file.
7205 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7206 that creates RFC 2047 encoded "words" labels them as that charset instead
7207 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7208 expansion operator; (ii) when Exim creates a From: line for a local
7209 message; (iii) when a header line is rewritten to include a "phrase" part.
7211 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7212 buggy, causing it to skip the first lines of messages whose message ID
7213 ended in 'D'. This would not have bitten before Exim release 4.14, because
7214 message IDs were unlikely to end in 'D' before then. The effect was to have
7215 incorrect size information for certain domains.
7217 45. #include "config.h" was missing at the start of the crypt16.c module. This
7218 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7221 46. If there was a timeout during a "random" callout check, Exim treated it as
7222 a failure of the random address, and carried on sending RSET and the real
7223 address. If the delay was just some slowness somewhere, the response to the
7224 original RCPT would be taken as a response to RSET and so on, causing
7225 mayhem of various kinds.
7227 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7228 when I implemented it. It didn't allow for the fact that some option values
7229 may legitimately be negative (e.g. size_addition), and it didn't even do
7230 the right test for positive values.
7232 48. Domain names in DNS records are case-independent. Exim always looks them up
7233 in lower case. Some resolvers return domain names in exactly the case they
7234 appear in the zone file, that is, they may contain uppercase letters. Not
7235 all resolvers do this - some return always lower case. Exim was treating a
7236 change of case by a resolver as a change of domain, similar to a widening
7237 of a domain abbreviation. This triggered its re-routing code and so it was
7238 trying to route what was effectively the same domain again. This normally
7239 caused routing to fail (because the router wouldn't handle the domain
7240 twice). Now Exim checks for this case specially, and just changes the
7241 casing of the domain that it ultimately uses when it transmits the message
7244 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7247 50. If a filter generated a file delivery with a non-absolute name (possible if
7248 no home directory exists for the router), the forbid_file option was not
7251 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7252 the existing equality matching.
7254 52. Exim was using ints instead of ino_t variables in some places where it was
7255 dealing with inode numbers.
7257 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7258 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7259 called TMPDIR, and if it finds it is different, it changes its value.
7261 54. The smtp_printf() function is now made available to local_scan() so
7262 additional output lines can be written before returning. There is also an
7263 smtp_fflush() function to enable the detection of a dropped connection.
7264 The variables smtp_input and smtp_batched_input are exported to
7267 55. Changed the default runtime configuration: the message "Unknown user"
7268 has been removed from the ACL, and instead placed on the localuser router,
7269 using the cannot_route_message feature. This means that any verification
7270 failures that generate their own messages won't get overridden. Similarly,
7271 the "Unrouteable address" message that was in the ACL for unverifiable
7272 relay addresses has also been removed.
7274 56. Added hosts_avoid_esmtp to the smtp transport.
7276 57. The exicyclog script was not checking for the esoteric option
7277 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7278 will work only if exicyclog is run under the appropriate euid.
7280 58. Following a discussion on the list, the rules by which Exim recognises line
7281 endings on incoming messages have been changed. The -dropcr and drop_cr
7282 options are now no-ops, retained only for backwards compatibility. The
7283 following line terminators are recognized: LF CRLF CR. However, special
7284 processing applies to CR:
7286 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7287 nor a local message in the state where . is a terminator.
7289 (ii) If a bare CR is encountered in a header line, an extra space is added
7290 after the line terminator so as not to end the header. The reasoning
7291 behind this is that bare CRs in header lines are most likely either
7292 to be mistakes, or people trying to play silly games.
7294 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7295 was being incorrectly given as 18 bytes larger than it should have been.
7296 This is a VOB (very old bug).
7298 60. This may never have affected anything current, but just in case it has:
7299 When the local host is found other than at the start of a list of hosts,
7300 the local host, those with the same MX, and any that follow, are discarded.
7301 When the list in question was part of a longer list of hosts, the following
7302 hosts (not currently being processed) were also being discarded. This no
7303 longer happens. I'm not sure if this situation could ever has previously
7306 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7309 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7310 header. This is something that is recommended in a new Internet Draft, and
7311 is something that is documented as being done by Sendmail. There are two
7312 possible values. For messages generated by the autoreply transport, Exim
7315 Auto-Submitted: auto-replied
7317 whereas for all other generated messages (e.g. bounces) it adds
7319 Auto-Submitted: auto-generated
7321 63. The "personal" condition in filters now includes a test for the
7322 Auto-Submitted: header. If it contains the string "auto-" the message it
7323 not considered personal.
7325 64. Added rcpt_include_affixes as a generic transport option.
7327 65. Added queue_only_override (default true).
7329 66. Added the syslog_duplication option.
7331 67. If what should have been the first header line of a message consisted of
7332 a space followed by a colon, Exim was mis-interpreting it as a header line.
7333 It isn't of course - it is syntactically invalid and should therefore be
7334 treated as the start of the message body. The misbehaviour could have
7335 caused a number of strange effects, including loss of data in subsequent
7336 header lines, and spool format errors.
7338 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7339 client host had authenticated. This control can now be exercised by an ACL
7340 for more flexibility.
7342 69. By default, callouts do not happen when testing with -bh. There is now a
7343 variant, -bhc, which does actually run the callout code, including
7344 consulting and updating the callout cache.
7346 70. Added support for saslauthd authentication, courtesy of Alexander
7349 71. If statvfs() failed on the spool or log directories while checking their
7350 size for availability, Exim confusingly gave the error "space shortage".
7351 Furthermore, in debugging mode it crashed with a floating point exception.
7352 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7353 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7354 serious problem, Exim now writes to the main and panic logs when this
7355 happens, with details of the failure. It then refuses to accept the
7356 incoming message, giving the message "spool directory problem" or "log
7357 directory problem" with a 421 code for SMTP messages.
7359 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7360 0, 1, and 2 exist, because some OS complain for execs without them (see
7361 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7362 descriptors. However, the code omitted to check that the open succeeded,
7363 causing mysterious errors if for some reason the permissions on /dev/null
7364 got screwed. Now Exim writes a message to the main and panic logs, and
7365 bombs out if it can't open /dev/null.
7367 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7368 interact so that it is all more flexible. It is supposed to remain
7369 backwards compatible. Also added extra_local_interfaces.
7371 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7372 to bomb out with an assertion failure - to the client this appears as a
7373 connection drop. This problem occurs in the part of the code that was taken
7374 from the Samba project. Fortunately, the assertion is in a very simple
7375 function, so I have fixed this by reproducing the function inline in the
7376 one place where it is called, and arranging for authentication to fail
7377 instead of killing the process with assert().
7379 75. The SPA client code was not working when the server requested OEM rather
7380 than Unicode encoding.
7382 76. Added code to make require_files with a specific uid setting more usable in
7383 the case where statting the file as root fails - usually a non-root-mounted
7384 NFS file system. When this happens and the failure is EACCES, Exim now
7385 forks a subprocess and does the per-uid checking as the relevant uid.
7387 77. Added process_log_path.
7389 78. If log_file_path was not explicitly set, a setting of check_log_space or
7390 check_log_inodes was ignored.
7392 79. If a space check for the spool or log partitions fails, the incident is now
7393 logged. Of course, in the latter case the data may get lost...
7395 80. Added the %p formatting code to string_format() so that it can be used to
7396 print addresses in debug_print(). Adjusted all the address printing in the
7397 debugging in store.c to use %p rather than %d.
7399 81. There was a concern that a line of code in smtp_in.c could overflow a
7400 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7401 initially expressed, the concern was not well-founded, because trailing
7402 spaces are removed early. However, if the trailing spaces were followed by
7403 a NULL, they did not get removed, so the overflow was possible. Two fixes
7406 (a) I re-wrote the offending code in a cleaner fashion.
7407 (b) If an incoming SMTP command contains a NULL character, it is rejected
7410 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7411 runs initgroups(), so that if the Exim user is in any additional groups,
7412 they will be used during message reception.
7418 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob