1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
12 buffer overrun for (non-chunking) other transports.
14 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
15 TLS1.3, means that a server rejecting a client certificate is not visible
16 to the client until the first read of encrypted data (typically the
17 response to EHLO). Add detection for that case and treat it as a failed
18 TLS connection attempt, so that the normal retry-in-clear can work (if
21 JB/01 BZg 2375: fix expansions of 822 addresses having comments in local-part
22 and/or domain. Found and fixed by Jason Betts.
28 JH/01 Remove code calling the customisable local_scan function, unless a new
29 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
31 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
32 non-signal-safe functions being used.
34 JH/03 Bug 2269: When presented with a received message having a stupidly large
35 number of DKIM-Signature headers, disable DKIM verification to avoid
36 a resource-consumption attack. The limit is set at twenty.
38 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
39 report of oldest_pass in ${authres } in consequence, and separate out
40 some descriptions of reasons for verification fail.
42 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
43 files in the spool were present and unlocked. A queue-runner could spot
44 them, resulting in a duplicate delivery. Fix that by doing the unlock
45 after the unlink. Investigation by Tim Stewart. Take the opportunity to
46 add more error-checking on spoolfile handling while that code is being
49 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
50 No known attacks, no CVE, this is defensive hardening.
52 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
53 a queue-runner could start a delivery while other operations were ongoing.
54 Cutthrough delivery was a common victim, resulting in duplicate delivery.
55 Found and investigated by Tim Stewart. Fix by using the open message data
56 file handle rather than opening another, and not locally closing it (which
57 releases a lock) for that case, while creating the temporary .eml format
58 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
60 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
61 $sender_verify_failure/$recipient_verify_failure to "random".
63 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
66 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
67 Previously this would segfault.
69 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
72 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
73 like zero, since the resolver should be doing this for us, But we need one
74 as a CNAME but no MX presence gets the CNAME returned; we need to check
75 that doesn't point to an MX to declare it "no MX returned" rather than
76 "error, loop". A new main option is added so the older capability of
77 following some limited number of chain links is maintained.
79 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
81 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
82 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
83 now-deprecated earlier definitions used only specified the range up to TLS
84 1.2 (in the older-version library docs).
86 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
88 JH/15 Rework TLS client-side context management. Stop using a global, and
89 explicitly pass a context around. This enables future use of TLS for
90 connections to service-daemons (eg. malware scanning) while a client smtp
91 connection is using TLS; with cutthrough connections this is quite likely.
93 JH/16 Fix ARC verification to do AS checks in reverse order.
95 JH/17 Support a "tls" option on the ${readsocket } expansion item.
97 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
98 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
99 Previously the "utf8" would be re-prepended for every additional message.
101 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
102 Previously thery were accepted, resulting in issues when attempting to
103 forward messages to a non-supporting MTA.
105 PP/02 Let -n work with printing macros too, not just options.
107 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
108 one parent address was copied, and bogus data was used at delivery-logging
109 time. Either a crash (after delivery) or bogus log data could result.
110 Discovery and analysis by Tim Stewart.
112 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
113 Previously if the string ended mid-character, we did not insert the
114 promised '?' replacement.
116 PP/04 Documentation: current string operators work on bytes, not codepoints.
118 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
119 should pack well giving a smaller memory footprint so better caching and
120 therefore performance. Group the declarations where this can't be done so
121 that the byte-sized flag variables are not interspersed among pointer
122 variables, giving a better chance of good packing by the compiler.
124 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
125 non-null, to avoid issues with sites running BATV. Previously reports were
126 sent with an empty envelope sender so looked like bounces.
128 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
129 The ignore_error flag wasn't being returned from the filter subprocess so
130 was not set for later routers. Investigation and fix by Matthias Kurz.
132 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
133 and a msg:complete for the whole, when a message is manually removed using
134 -Mrm. Developement by Matthias Kurz, hacked on by JH.
136 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
137 a "Gnu special" function, asprintf() in the DB utility binary builds; I
138 hope that is portable enough.
140 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
141 requiring a known-CA anchor certificate; make it now rely entirely on the
142 TLSA as an anchor. Checking the name on the leaf cert against the name
143 on the A-record for the host is still done for TA (but not for EE mode).
145 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
146 included in delivery lines for non-proxied connections, when compiled with
147 SUPPORT_SOCKS and running with proxy logging enabled.
149 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
150 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
151 move the existing event to fire before the normal logging of message
152 failure so that custom logging is bracketed by normal logging.
154 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
155 msg:fail:internal event. Developement by Matthias Kurz.
157 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
158 far too small for todays use of crypto signatures stored there. Go all
159 the way to the max DNS message size of 64kB, even though this might be
160 overmuch for IOT constrained device use.
162 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
163 copy a string over itself. The library routine is documented as not
164 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
166 JH/32 For main options check_spool_space and check_inode_space, where the
167 platform supports 64b integers, support more than the previous 2^31 kB
168 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
169 the previous G, M, k.
171 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
172 $authenticated_fail_id variable on authentication failure. Previously
175 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
176 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
177 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
178 GNUTLS_SEC_PARAM_MEDIUM.
180 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
181 side. Previously we would continue as if no SNI had been received.
183 JH/36 Harden the handling of string-lists. When a list consisted of a sole
184 "<" character, which should be a list-separator specification, we walked
185 off past the nul-terimation.
187 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
188 causes) even when the retry time is not yet met. Previously they were
189 not, meaning that when (say) an account was over-quota and temp-rejecting,
190 and multiple senders' messages were queued, only one sender would get
191 notified on each configured delay_warning cycle.
193 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
195 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
196 cipher-suites, an error can be left on the stack even for a succeeding
197 accept; this results in impossible error messages when a later operation
200 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
201 return error codes indicating retry. Under TLS1.3 this becomes required.
203 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
204 it only wrote the new authenticators, resulting in a lack of tracking of
205 peer changes of ESMTP extensions until the next cache flush.
207 JH/41 Fix the loop reading a message header line to check for integer overflow,
208 and more-often against header_maxsize. Previously a crafted message could
209 induce a crash of the recive process; now the message is cleanly rejected.
211 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
212 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
218 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
219 When redis_servers is set to a list of > 1 element, and the Redis servers
220 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
221 case of MOVED into a DEFER case instead, thus moving the query onto the
222 next server in the list. For a cluster of N elements, all N servers must
223 be defined in redis_servers.
225 GF/02 Catch and remove uninitialized value warning in exiqsumm
226 Check for existence of @ARGV before looking at $ARGV[0]
228 JH/01 Replace the store_release() internal interface with store_newblock(),
229 which internalises the check required to safely use the old one, plus
230 the allocate and data copy operations duplicated in both (!) of the
231 extant use locations.
233 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
234 modifier. This matches the restriction on the commandline.
236 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
237 Previously only the last row was returned.
239 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
240 we assumed that tags in the header were well-formed, and parsed the
241 element content after inspecting only the first char of the tag.
242 Assumptions at that stage could crash the receive process on malformed
245 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
246 While running the DKIM ACL we operate on the Permanent memory pool so that
247 variables created with "set" persist to the DATA ACL. Also (at any time)
248 DNS lookups that fail create cache records using the Permanent pool. But
249 expansions release any allocations made on the current pool - so a dnsdb
250 lookup expansion done in the DKIM ACL releases the memory used for the
251 DNS negative-cache, and bad things result. Solution is to switch to the
252 Main pool for expansions.
253 While we're in that code, add checks on the DNS cache during store_reset,
254 active in the testsuite.
255 Problem spotted, and debugging aided, by Wolfgang Breyha.
257 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
258 When none of the hosts presented to a transport match an already-open
259 connection, close it and proceed with the list. Previously we would
260 queue the message. Spotted by Lena with Yahoo, probably involving
263 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
264 Previously a spurious "250 OK id=" response was appended to the proper
267 JH/08 The "support for" informational output now, which built with Content
268 Scanning support, has a line for the malware scanner interfaces compiled
269 in. Interface can be individually included or not at build time.
271 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
272 by the template makefile "src/EDITME". The "STREAM" support for an older
273 ClamAV interface method is removed.
275 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
276 rows affected is given instead).
278 JH/11 The runtime Berkeley DB library version is now additionally output by
279 "exim -d -bV". Previously only the compile-time version was shown.
281 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
282 SMTP connection. Previously, when one had more receipients than the
283 first, an abortive onward connection was made. Move to full support for
284 multiple onward connections in sequence, handling cutthrough connection
285 for all multi-message initiating connections.
287 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
288 routers. Previously, a multi-recipient message would fail to match the
289 onward-connection opened for the first recipient, and cause its closure.
291 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
292 a timeout on read on a GnuTLS initiating connection, resulting in the
293 initiating connection being dropped. This mattered most when the callout
294 was marked defer_ok. Fix to keep the two timeout-detection methods
297 JH/15 Relax results from ACL control request to enable cutthrough, in
298 unsupported situations, from error to silently (except under debug)
299 ignoring. This covers use with PRDR, frozen messages, queue-only and
302 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
304 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
305 metadata, resulting in a crash in free().
307 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
308 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
309 Broken also in d185889f4, with init system revamp.
311 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
312 Previously we abruptly closed the connection after reading a malware-
313 found indication; now we go on to read the "scan ok" response line,
316 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
317 ACL. Previously, a crash would result.
319 JH/19 Speed up macro lookups during configuration file read, by skipping non-
320 macro text after a replacement (previously it was only once per line) and
321 by skipping builtin macros when searching for an uppercase lead character.
323 JH/20 DANE support moved from Experimental to mainline. The Makefile control
324 for the build is renamed.
326 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
327 was allocated for every new TLS startup, meaning one per message. Fix
328 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
330 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
331 reported the original. Fix to report (as far as possible) the ACL
332 result replacing the original.
334 JH/23 Fix memory leak during multi-message connections using STARTTLS under
335 OpenSSL. Certificate information is loaded for every new TLS startup,
336 and the resources needed to be freed.
338 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
340 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
343 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
344 DATA response info to the (existing) per-recipient response info for
345 the "C=" log element. It can have useful tracking info from the
346 destination system. Patch from Simon Arlott.
348 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
349 length value. Previously this would segfault.
351 HS/02 Support Avast multiline protoocol, this allows passing flags to
352 newer versions of the scanner.
354 JH/28 Ensure that variables possibly set during message acceptance are marked
355 dead before release of memory in the daemon loop. This stops complaints
356 about them when the debug_store option is enabled. Discovered specifically
357 for sender_rate_period, but applies to a whole set of variables.
358 Do the same for the queue-runner and queue-list loops, for variables set
359 from spool message files. Do the same for the SMTP per-message loop, for
360 certain variables indirectly set in ACL operations.
362 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
363 as a multi-recipient message from a mailinglist manager). The coding had
364 an arbitrary cutoff number of characters while checking for more input;
365 enforced by writing a NUL into the buffer. This corrupted long / fast
366 input. The problem was exposed more widely when more pipelineing of SMTP
367 responses was introduced, and one Exim system was feeding another.
368 The symptom is log complaints of SMTP syntax error (NUL chars) on the
369 receiving system, and refused recipients seen by the sending system
370 (propating to people being dropped from mailing lists).
371 Discovered and pinpointed by David Carter.
373 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
374 replaced by the ${authresults } expansion.
376 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
378 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
379 allows proper process termination in container environments.
381 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
382 Previously the "final dot" had a newline after it; ensure it is CR,LF.
384 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
385 and "err_perm", deprecated since 4.83 when the RFC-defined words
386 "temperror" and "permerror" were introduced.
388 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
389 transport-filters or DKIM-signing. The restriction was lost in the
390 consolidation of verify-callout and delivery SMTP handling.
391 Extend the restriction to also cover ARC-signing.
393 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
394 in defer=pass mode supply a 450 to the initiator. Previously the message
397 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
398 tls_require_ciphers is used as before.
400 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
401 "pass_unscanned". Only tmpfails from the scanner are written to
402 the paniclog, as they may require admin intervention (permission
403 denied, license issues). Other scanner errors (like decompression
404 bombs) do not cause a paniclog entry.
406 JH/36 Fix reinitialisation of DKIM logging variable between messages.
407 Previously it was possible to log spurious information in receive log
410 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
411 triggered odd behaviour from Outlook Express clients.
413 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
416 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
417 since the IETF WG has not yet settled on that versus the original
418 "bare" representation.
420 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
421 Previously the millisecond value corrupted the output.
422 Fix also for syslog_pid=no and log_selector +pid, for which the pid
423 corrupted the output.
429 JH/01 Rework error string handling in TLS interface so that the caller in
430 more cases is responsible for logging. This permits library-sourced
431 string to be attached to addresses during delivery, and collapses
432 pairs of long lines into single ones.
434 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
435 during configuration. Wildcards are allowed and expanded.
437 JH/02 Rework error string handling in DKIM to pass more info back to callers.
438 This permits better logging.
440 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
441 do not close it down and have the child transport start it up again on
442 the passed-on TCP connection. Instead, proxy the child (and any
443 subsequent ones) for TLS via a unix-domain socket channel. Logging is
444 affected: the continued delivery log lines do not have any DNSSEC, TLS
445 Certificate or OCSP information. TLS cipher information is still logged.
447 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
448 identical IP addresses on different listening ports. Will also affect
451 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
452 add noisy ifdef guards to special-case this sillyness.
453 Patch from Bernd Kuhls.
455 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
456 than 255 are no longer allowed.
458 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
459 Disable the session-cache too, which might reduce our load. Since we
460 currrectly use a new context for every connection, both as server and
461 client, there is no benefit for these.
462 GnuTLS appears to not support tickets server-side by default (we don't
463 call gnutls_session_ticket_enable_server()) but client side is enabled
464 by default on recent versions (3.1.3 +) unless the PFS priority string
467 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
468 <https://reproducible-builds.org/specs/source-date-epoch/>.
470 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
471 the check for any unsuccessful recipients did not notice the limit, and
472 erroneously found still-pending ones.
474 JH/08 Pipeline CHUNKING command and data together, on kernels that support
475 MSG_MORE. Only in-clear (not on TLS connections).
477 JH/09 Avoid using a temporary file during transport using dkim. Unless a
478 transport-filter is involved we can buffer the headers in memory for
479 creating the signature, and read the spool data file once for the
480 signature and again for transmission.
482 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
483 4.77 as the kernel support then wasn't solid, having issues in 64bit
484 mode. Now, it's been long enough. Add support for FreeBSD also.
486 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
487 case where the routing stage had gathered several addresses to send to
488 a host before calling the transport for the first, we previously failed
489 to close down TLS in the old transport process before passing the TCP
490 connection to the new process. The new one sent a STARTTLS command
491 which naturally failed, giving a failed delivery and bloating the retry
492 database. Investigation and fix prototype from Wolfgang Breyha.
494 JH/12 Fix check on SMTP command input synchronisation. Previously there were
495 false-negatives in the check that the sender had not preempted a response
496 or prompt from Exim (running as a server), due to that code's lack of
497 awareness of the SMTP input buffering.
499 PP/04 Add commandline_checks_require_admin option.
500 Exim drops privileges sanely, various checks such as -be aren't a
501 security problem, as long as you trust local users with access to their
502 own account. When invoked by services which pass untrusted data to
503 Exim, this might be an issue. Set this option in main configuration
504 AND make fixes to the calling application, such as using `--` to stop
507 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
508 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
509 responses to those, into a single TLS record each way (this usually means
510 a single packet). As a side issue, smtp_enforce_sync now works on TLS
513 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
514 affects you only if you're dancing at the edge of the param size limits.
515 If you are, and this message makes sense to you, then: raise the
516 configured limit or use OpenSSL 1.1. Nothing we can do for older
519 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
520 cmdline element to get the documented default one. Previously it was
523 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
524 are unsuable for non-message-specific reasons - eg. connection timeout,
525 banner-time rejection.
527 JH/16 Fix logging of delivery remote port, when specified by router, under
530 PP/06 Repair manualroute's ability to take options in any order, even if one
531 is the name of a transport.
534 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
536 JH/17 Change the list-building routines interface to use the expanding-string
537 triplet model, for better allocation and copying behaviour.
539 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
540 Previously it was constructed the first time a possibly-matching string
541 was met in the configuration file input during startup; now it is done
544 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
545 compatible one, to avoid the (poorly documented) possibility of a config
546 file in the working directory redirecting the DB files, possibly correpting
547 some existing file. CVE-2017-10140 assigned for BDB.
549 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
550 cache-hot. Previously, although the result was properly cached, the
551 initial verify call returned a defer.
553 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
554 the main verify for receipient in uncached-mode.
556 JH/22 Retire historical build files to an "unsupported" subdir. These are
557 defined as "ones for which we have no current evidence of testing".
559 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
560 if present. Previously it was ignored.
562 JH/24 Start using specified-initialisers in C structure init coding. This is
563 a C99 feature (it's 2017, so now considered safe).
565 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
566 if was a fixed-sized field and bitmask ops via macros; it is now more
569 PP/07 GitHub PR 56: Apply MariaDB build fix.
570 Patch provided by Jaroslav Škarvada.
572 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
573 during Coverity cleanups [4.87 JH/47]
574 Diagnosis and fix provided by Michael Fischer v. Mollard.
576 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
577 the right size to place the terminating semicolon on its own folded
578 line, the header hash was calculated to an incorrect value thanks to
579 the (relaxed) space the fold became.
581 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
582 and confused the parent.
584 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
585 which could crash as a result. This could lead to undeliverable messages.
587 JH/28 Logging: "next input sent too soon" now shows where input was truncated
590 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
591 matters on fast-turnover and PID-randomising systems, which were getting
592 out-of-order delivery.
594 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
595 a possibly-overlapping copy. The symptom was that "Remote host closed
596 connection in response to HELO" was logged instead of the actual 4xx
599 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
600 Previously only that bufferd was discarded, resulting in SYMTP command
603 JH/32 DKIM: when a message has multiple signatures matching an identity given
604 in dkim_verify_signers, run the dkim acl once for each. Previously only
605 one run was done. Bug 2189.
607 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
608 "panic the current process" to "deliberately defer". The panic log is
609 still written with the problem list name; the mail and reject logs now
610 get a temp-reject line for the message that was being handled, saying
611 something like "domains check lookup or other defer". The SMTP 451
612 message is still "Temporary local problem".
614 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
615 A crafted sequence of BDAT commands could result in in-use memory beeing
616 freed. CVE-2017-16943.
618 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
619 from SMTP input. Previously it was always done; now only done for DATA
620 and not BDAT commands. CVE-2017-16944.
622 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
623 to the message (such as an overlong header line). Previously this was
624 not done and we did not exit BDAT mode. Followon from the previous item
625 though a different problem.
631 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
632 than -2003 did; needs libidn2 in addition to libidn.
634 JH/02 The path option on a pipe transport is now expanded before use.
636 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
637 Patch provided by "Björn", documentation fix added too.
639 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
640 missing a wire-to-host endian conversion.
642 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
643 close after a BDAT command line could be taken as a following command,
644 giving a synch failure. Fix by only checking for synch immediately
645 before acknowledging the chunk.
647 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
648 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
649 macro. Patches provided by Josh Soref.
651 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
652 Previously we did not; the RFC seems ambiguous and VRFY is not listed
653 by IANA as a service extension. However, John Klensin suggests that we
656 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
657 the dkim code may be unix-mode line endings rather than smtp wire-format
658 CRLF, so prepend a CR to any bare LF.
660 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
661 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
663 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
664 the first were themselves being wrongly included in the feed into dkim
665 processing; with most chunk sizes in use this resulted in an incorrect
666 body hash calculated value.
668 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
669 DKIM signature block, for verification. Although advised against by
670 standards it is specifically not ruled illegal.
672 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
674 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
675 missing a body hash (the bh= tag).
677 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
678 It seems that HAProxy sends the Proxy Protocol information in clear and
679 only then does a TLS startup, so do the same.
681 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
682 TCP connections (such as for Spamd) unless the daemon successfully set
683 Fast Open mode on its listening sockets. This fixes breakage seen on
684 too-old kernels or those not configured for Fast Open, at the cost of
685 requiring both directions being enabled for TFO, and TFO never being used
686 by non-daemon-related Exim processes.
688 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
689 endings, at least on the first header line. Try to canonify any that get
690 past that check, despite the cost.
692 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
693 now limited to an arbitrary five deep, while parsing addresses with the
694 strip_excess_angle_brackets option enabled.
696 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
697 instead leave the unprompted TLS handshake in socket buffer for the
698 TLS library to consume.
700 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
702 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
704 JH/16 Drop variables when they go out of scope. Memory management drops a whole
705 region in one operation, for speed, and this leaves assigned pointers
706 dangling. Add checks run only under the testsuite which checks all
707 variables at a store-reset and panics on a dangling pointer; add code
708 explicitly nulling out all the variables discovered. Fixes one known
709 bug: a transport crash, where a dangling pointer for $sending_ip_address
710 originally assigned in a verify callout, is re-used.
712 PP/06 Drop '.' from @INC in various Perl scripts.
714 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
716 PP/08 Reduce a number of compilation warnings under clang; building with
717 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
718 should be warning-free.
720 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
722 HS/01 Fix portability problems introduced by PP/08 for platforms where
723 realloc(NULL) is not equivalent to malloc() [SunOS et al].
725 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
726 chunk. This allows us to accept broken chunked messages. We need a more
727 general solution here.
729 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
730 already-broken messages in the queue.
732 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
734 JH/19 Fix reference counting bug in routing-generated-address tracking.
740 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
741 supports it and a size is available (ie. the sending peer gave us one).
743 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
744 years of being deprecated). The replacements are the ACLs
745 acl_smtp_mime and acl_not_smtp_mime.
747 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
748 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
749 or even an in-clear connection were permitted. Now, if the host lookup
750 was dnssec and dane was requested then the host is only used if the
751 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
752 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
753 if one fails this test.
754 This means that a poorly-configured remote DNS will make it incommunicado;
755 but it protects against a DNS-interception attack on it.
757 JH/04 Bug 1810: make continued-use of an open smtp transport connection
758 non-noisy when a race steals the message being considered.
760 JH/05 If main configuration option tls_certificate is unset, generate a
761 self-signed certificate for inbound TLS connections.
763 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
764 in rewrites and routers.
766 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
767 and logged a warning sing 4.83; now they are a configuration file error.
769 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
770 (lacking @domain). Apply the same qualification processing as RCPT.
772 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
774 JH/10 Support ${sha256:} applied to a string (as well as the previous
777 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
778 a cutthrough deliver is pending, as we always want to make a connection.
779 This also avoids re-routing the message when later placing the cutthrough
780 connection after a verify cache hit.
781 Do not update it with the verify result either.
783 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
784 when routing results in more than one destination address.
786 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
787 signing (which inhibits the cutthrough capability). Previously only
788 the presence of an option was tested; now an expansion evaluating as
789 empty is permissible (obviously it should depend only on data available
790 when the cutthrough connection is made).
792 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
793 the relevant preceding SMTP command did not note the pipelining mode.
795 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
796 Previously they were not counted.
798 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
799 as one having no matching records. Previously we deferred the message
800 that needed the lookup.
802 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
803 distinguished as "(=".
805 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
806 for missing MX records. Previously it only worked for missing A records.
808 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
810 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
811 after the data-go-ahead and data-ack. Patch from Jason Betts.
813 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
814 even for a "none" policy. Patch from Tony Meyer.
816 JH/22 Fix continued use of a connection for further deliveries. If a port was
817 specified by a router, it must also match for the delivery to be
820 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
821 When one of the recipients of a message was unsuitable for the connection
822 (has no matching addresses), we lost track of needing to mark it
823 deferred. As a result mail would be lost.
825 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
827 JH/25 Decoding ACL controls is now done using a binary search; the source code
828 takes up less space and should be simpler to maintain. Merge the ACL
829 condition decode tables also, with similar effect.
831 JH/26 Fix problem with one_time used on a redirect router which returned the
832 parent address unchanged. A retry would see the parent address marked as
833 delivered, so not attempt the (identical) child. As a result mail would
836 JH/27 Fix a possible security hole, wherein a process operating with the Exim
837 UID can gain a root shell. Credit to http://www.halfdog.net/ for
838 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
841 JH/28 Enable {spool,log} filesystem space and inode checks as default.
842 Main config options check_{log,spool}_{inodes,space} are now
843 100 inodes, 10MB unless set otherwise in the configuration.
845 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
846 Previously it only applied to the main-section connection policy
849 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
851 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
852 by me. Added RFC7919 DH primes as an alternative.
854 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
855 are not in the system include path.
857 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
858 GnuTLS, when a session startup failed (eg because the client disconnected)
859 Exim did stdio operations after fclose. This was exposed by a recent
860 change which nulled out the file handle after the fclose.
862 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
863 signed directly by the cert-signing cert, rather than an intermediate
864 OCSP-signing cert. This is the model used by LetsEncrypt.
866 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
868 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
869 an incoming connection.
871 HS/02 Bug 1802: Do not half-close the connection after sending a request
874 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
875 fallback to "prime256v1".
877 JH/34 SECURITY: Use proper copy of DATA command in error message.
878 Could leak key material. Remotely exploitable. CVE-2016-9963.
884 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
885 and 3.4.4 - once the server is enabled to respond to an OCSP request
886 it does even when not requested, resulting in a stapling non-aware
887 client dropping the TLS connection.
889 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
890 support variable-length bit vectors. No functional change.
892 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
893 The I= interface field on outgoing lines is now after the H= remote
894 host field, same as incoming lines. There is a separate
895 outgoing_interface log selector which allows you to disable the
898 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
899 If not running log_selector +smtp_connection the mainlog would be held
900 open indefinitely after a "too many connections" event, including to a
901 deleted file after a log rotate. Leave the per net connection logging
902 leaving it open for efficiency as that will be quickly detected by the
903 check on the next write.
905 HS/01 Bug 1671: Fix post transport crash.
906 Processing the wait-<transport> messages could crash the delivery
907 process if the message IDs didn't exist for some reason. When
908 using 'split_spool_directory=yes' the construction of the spool
909 file name failed already, exposing the same netto behaviour.
911 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
912 mime_regex ACL conditions.
914 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
915 to DSN fail messages (bounces): remote IP, remote greeting, remote response
916 to HELO, local diagnostic string.
918 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
919 log line to debug. Even when configured with a tls authenticator many
920 client connections are expected to not authenticate in this way, so
921 an authenticate fail is not an error.
923 HS/02 Add the Exim version string to the process info. This way exiwhat
924 gives some more detail about the running daemon.
926 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
927 matter for fast-change records such as DNSBLs.
929 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
930 retry record, even if constant. There may be multiple transports with
931 different interface settings and the retry behaviour needs to be kept
934 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
936 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
938 JH/10 Bug 840: fix log_defer_output option of pipe transport
940 JH/11 Bug 830: use same host for all RCPTS of a message, even under
941 hosts_randomize. This matters a lot when combined with mua_wrapper.
943 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
944 ${quote_pgsql:<string>} operator.
946 JH/13 Bug 1708: avoid misaligned access in cached lookup.
948 JH/14 Change header file name for freeradius-client. Relevant if compiling
949 with Radius support; from the Gentoo tree and checked under Fedora.
951 JH/15 Bug 1712: Introduce $prdr_requested flag variable
953 JH/16 Bug 1714: Permit an empty string as expansion result for transport
954 option transport_filter, meaning no filtering.
956 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
958 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
959 defaults to "*" (all hosts). The variable is now available when not built
960 with TLS, default unset, mainly to enable keeping the testsuite sane.
961 If a server certificate is not supplied (via tls_certificate) an error is
962 logged, and clients will find TLS connections fail on startup. Presumably
963 they will retry in-clear.
964 Packagers of Exim are strongly encouraged to create a server certificate
965 at installation time.
967 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
968 with the $config_file variable.
970 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
971 in transport context, after the attempt, and per-recipient. The latter type
972 is per host attempted. The event data is the error message, and the errno
973 information encodes the lookup type (A vs. MX) used for the (first) host,
974 and the trailing two digits of the smtp 4xx response.
976 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
977 to write to mainlog (or rejectlog, paniclog) in the window between file
978 creation and permissions/ownership being changed. Particularly affects
979 installations where exicyclog is run as root, rather than exim user;
980 result is that the running daemon panics and dies.
982 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
984 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
985 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
986 "pri" and "weight". Note that the previous implicit priority given by the
987 list order is no longer honoured.
989 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
992 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
993 by defining SUPPORT_SOCKS.
995 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
996 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
997 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
998 variables are renamed to proxy_{local,external}_{address,port}.
1000 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1001 for a build by defining SUPPORT_I18N
1003 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1004 of the query string, and make ${quote_redis:} do that quoting.
1006 JH/29 Move Events support from Experimental to mainline, enabled by default
1007 and removable for a build by defining DISABLE_EVENT.
1009 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1011 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1012 cached by the daemon.
1014 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1015 by defining LOOKUP_REDIS. The libhiredis library is required.
1017 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1018 keys are given for lookup.
1020 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1021 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1022 only supported when built with TLS support. The PolarSSL SHA routines
1023 are still used when the TLS library is too old for convenient support.
1025 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1026 openssl_options), for security. OpenSSL forces this from version 1.1.0
1027 server-side so match that on older versions.
1029 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1030 allocation for $value could be released as the expansion processing
1031 concluded, but leaving the global pointer active for it.
1033 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1034 and to use the domains and local_parts ACL conditions.
1036 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1037 incorrectly not doubled on cutthrough transmission, hence seen as a
1038 body-termination at the receiving system - resulting in truncated mails.
1039 Commonly the sender saw a TCP-level error, and retransmitted the message
1040 via the normal store-and-forward channel. This could result in duplicates
1041 received - but deduplicating mailstores were liable to retain only the
1042 initial truncated version.
1044 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1046 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1048 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1049 we're in there, support oversigning also; bug 1309.
1051 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1053 HS/04 Add support for keep_environment and add_environment options.
1055 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1056 either intentional arithmetic overflow during PRNG, or testing config-
1059 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1060 delivery resulted in actual delivery. Cancel cutthrough before DATA
1063 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1064 rejects a recipient: pass the reject to the originator.
1066 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1067 Many were false-positives and ignorable, but it's worth fixing the
1070 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1071 for the new environment-manipulation done at startup. Move the routines
1072 from being local to tls.c to being global via the os.c file.
1074 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1075 an extract embedded as result-arg for a map, the first arg for extract
1076 is unavailable so we cannot tell if this is a numbered or keyed
1077 extraction. Accept either.
1083 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1086 JH/02 The smtp transport option "multi_domain" is now expanded.
1088 JH/03 The smtp transport now requests PRDR by default, if the server offers
1091 JH/04 Certificate name checking on server certificates, when exim is a client,
1092 is now done by default. The transport option tls_verify_cert_hostnames
1093 can be used to disable this per-host. The build option
1094 EXPERIMENTAL_CERTNAMES is withdrawn.
1096 JH/05 The value of the tls_verify_certificates smtp transport and main options
1097 default to the word "system" to access the system default CA bundle.
1098 For GnuTLS, only version 3.0.20 or later.
1100 JH/06 Verification of the server certificate for a TLS connection is now tried
1101 (but not required) by default. The verification status is now logged by
1102 default, for both outbound TLS and client-certificate supplying inbound
1105 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1108 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1109 Status Notification (bounce) messages are now MIME format per RFC 3464.
1110 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1111 under the control of the dsn_advertise_hosts option, and routers may
1112 have a dsn_lasthop option.
1114 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1115 default, modifiable by a malware= option. The list separator for
1116 the options can now be changed in the usual way. Bug 68.
1118 JH/10 The smtp_receive_timeout main option is now expanded before use.
1120 JH/11 The incoming_interface log option now also enables logging of the
1121 local interface on delivery outgoing connections.
1123 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1124 if the interface and destination host and port all match.
1126 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1129 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1130 Patch from Andrew Lewis.
1132 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1133 now supports optional time-restrictions, weighting, and priority
1134 modifiers per server. Patch originally by <rommer@active.by>.
1136 JH/16 The spamd_address main option now supports a mixed list of local
1137 and remote servers. Remote servers can be IPv6 addresses, and
1138 specify a port-range.
1140 JH/17 Bug 68: The spamd_address main option now supports an optional
1141 timeout value per server.
1143 JH/18 Bug 1581: Router and transport options headers_add/remove can
1144 now have the list separator specified.
1146 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1149 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1152 JH/21 Support for the A6 type of dns record is withdrawn.
1154 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1155 rather than the verbs used.
1157 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1158 from 255 to 1024 chars.
1160 JH/24 Verification callouts now attempt to use TLS by default.
1162 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1163 are generic router options now. The defaults didn't change.
1165 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1166 Original patch from Alexander Shikoff, worked over by JH.
1168 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1169 files if ZCAT_COMMAND is not executable.
1171 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1173 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1175 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1176 Normally benign, it bites when the pair was led to by a CNAME;
1177 modern usage is to not canonicalize the domain to a CNAME target
1178 (and we were inconsistent anyway for A-only vs AAAA+A).
1180 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1182 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1183 when evaluating $sender_host_dnssec.
1185 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1186 $sender_helo_dnssec variable.
1188 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1190 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1192 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1194 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1195 documented as working, but never had. Support all but $spam_report.
1197 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1198 added for tls authenticator.
1200 HS/03 Add perl_taintmode main config option
1206 TL/01 When running the test suite, the README says that variables such as
1207 no_msglog_check are global and can be placed anywhere in a specific
1208 test's script, however it was observed that placement needed to be near
1209 the beginning for it to behave that way. Changed the runtest perl
1210 script to read through the entire script once to detect and set these
1211 variables, reset to the beginning of the script, and then run through
1212 the script parsing/test process like normal.
1214 TL/02 The BSD's have an arc4random API. One of the functions to induce
1215 adding randomness was arc4random_stir(), but it has been removed in
1216 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1217 function when detected.
1219 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1220 cause callback expansion.
1222 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1223 syntax errors in an expansion can be treated as a string instead of
1224 logging or causing an error, due to the internal use of bool_lax
1225 instead of bool when processing it.
1227 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1228 server certificates when making smtp deliveries.
1230 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1232 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1234 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1236 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1237 Merged patch from Sebastian Wiedenroth.
1239 JH/05 Fix results-pipe from transport process. Several recipients, combined
1240 with certificate use, exposed issues where response data items split
1241 over buffer boundaries were not parsed properly. This eventually
1242 resulted in duplicates being sent. This issue only became common enough
1243 to notice due to the introduction of connection certificate information,
1244 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1246 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1247 size buffer was used, resulting in syntax errors when an expansion
1250 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1251 version 3.3.6 or later.
1253 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1254 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1255 both become "event_action", the variables become $event_name, $event_data
1256 and $event_defer_errno. There is a new variable $verify_mode, usable in
1257 routers, transports and related events. The tls:cert event is now also
1258 raised for inbound connections, if the main configuration event_action
1261 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1262 early OCSP support, but no stapling (appears to be less than 1.0.0).
1264 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1265 server certificate names available under the smtp transport option
1266 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1269 JH/10 Time-related extraction expansions from certificates now use the main
1270 option "timezone" setting for output formatting, and are consistent
1271 between OpenSSL and GnuTLS compilations. Bug 1541.
1273 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1274 encoded parameter in the incoming message. Bug 1558.
1276 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1277 include certificate info, eximon was claiming there were spoolfile
1280 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1282 JH/14 Log delivery-related information more consistently, using the sequence
1283 "H=<name> [<ip>]" wherever possible.
1285 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1286 are problematic for Debian distribution, omit them from the release
1289 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1291 JH/16 Fix string representation of time values on 64bit time_t architectures.
1294 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1295 output list separator was used.
1300 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1301 checkers that were complaining about end of non-void function with no
1304 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1305 This was a regression introduced in 4.83 by another bugfix.
1307 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1309 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1310 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1316 TF/01 Correctly close the server side of TLS when forking for delivery.
1318 When a message was received over SMTP with TLS, Exim failed to clear up
1319 the incoming connection properly after forking off the child process to
1320 deliver the message. In some situations the subsequent outgoing
1321 delivery connection happened to have the same fd number as the incoming
1322 connection previously had. Exim would try to use TLS and fail, logging
1323 a "Bad file descriptor" error.
1325 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1326 utilities have not been installed.
1328 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1329 temporary space as the ACL may create new global variables.
1331 TL/01 LDAP support uses per connection or global context settings, depending
1332 upon the detected version of the libraries at build time.
1334 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1335 to extract and use the src ip:port in logging and expansions as if it
1336 were a direct connection from the outside internet. PPv2 support was
1337 updated based on HAProxy spec change in May 2014.
1339 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1341 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1342 Properly escape header and check for NULL return.
1344 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1347 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1349 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1350 characters in header names, implemented as a verify condition.
1351 Contributed by Michael Fischer v. Mollard.
1353 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1354 results permerror and temperror. Previous values are deprecated but
1355 still accepted. In a future release, err_perm and err_temp will be
1356 completely removed, which will be a backward incompatibility if the
1357 ACL tests for either of these two old results. Patch contributed by
1358 user bes-internal on the mailing list.
1360 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1362 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1363 selectors, in both main and reject logs.
1365 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1368 JH/07 Add malware type "sock" for talking to simple daemon.
1370 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1372 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1373 routers/transports under cutthrough routing.
1375 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1376 numbers. Touch up "bool" conditional to keep the same definition.
1378 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1380 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1382 JH/12 Expand items in router/transport headers_add or headers_remove lists
1383 individually rather than the list as a whole. Bug 1452.
1385 Required for reasonable handling of multiple headers_ options when
1386 they may be empty; requires that headers_remove items with embedded
1387 colons must have them doubled (or the list-separator changed).
1389 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1390 view the policy declared in the DMARC record. Currently, $dmarc_status
1391 is a combined value of both the record presence and the result of the
1394 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1396 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1397 dnslookup router and the smtp transport (applying to the forward
1400 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1401 of ldap servers used for a specific lookup. Patch provided by Heiko
1404 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1405 New variable $lookup_dnssec_authenticated for observability.
1407 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1408 Patch submitted by Lars Timman.
1410 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1412 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1413 Requires trusted mode and valid format message id, aborts otherwise.
1414 Patch contributed by Heiko Schlichting.
1416 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1417 certextract with support for various fields. Bug 1358.
1419 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1420 is requested by default, modifiable by smtp transport option
1423 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1424 operate on certificate variables to give certificate fingerprints
1425 Also new ${sha256:cert_variable}.
1427 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1429 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1430 Christian Aistleitner.
1432 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1434 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1435 file. Patch from Wolfgang Breyha.
1437 JH/25 Expand the coverage of the delivery $host and $host_address to
1438 client authenticators run in verify callout. Bug 1476.
1440 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1441 align with daemon_smtp_ports. Bug 72.
1443 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1444 support and error reporting did not work properly.
1446 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1447 and is readable. Patch from Andrew Colin Kissa.
1449 TL/14 Enhance documentation of ${run expansion and how it parses the
1450 commandline after expansion, particularly in the case when an
1451 unquoted variable expansion results in an empty value.
1453 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1455 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1456 by renaming away from it. Addresses GH issue 15, reported by
1459 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1461 TL/15 SECURITY: prevent double expansion in math comparison functions
1462 (can expand unsanitized data). Not remotely exploitable.
1469 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1471 PP/02 Make -n do something, by making it not do something.
1472 When combined with -bP, the name of an option is not output.
1474 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1477 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1478 $sender_host_name and config options to manage this, and basic check
1481 PP/05 DSCP support for outbound connections and control modifier for inbound.
1483 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1484 (Only plugin which currently uses this is kerberos4, which nobody should
1485 be using, but we should make it available and other future plugins might
1486 conceivably use it, even though it would break NAT; stuff *should* be
1487 using channel bindings instead).
1489 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1490 name; added for Sendmail compatibility; requires admin caller.
1491 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1492 just ignore it); requires trusted caller.
1493 Also parse but ignore: -Ac -Am -X<logfile>
1496 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1498 TL/02 Add +smtp_confirmation as a default logging option.
1500 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1501 Patch by Magnus Holmgren from 2007-02-20.
1503 TL/04 Bugzilla 1281 - Spec typo.
1504 Bugzilla 1283 - Spec typo.
1505 Bugzilla 1290 - Spec grammar fixes.
1507 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1509 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1511 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1512 mailing list by by Dmitry Isaikin.
1514 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1516 JH/02 Support "G" suffix to numbers in ${if comparisons.
1518 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1520 NM/01 Bugzilla 1197 - Spec typo
1521 Bugzilla 1196 - Spec examples corrections
1523 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1525 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1526 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1529 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1530 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1532 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1533 "acl {{name}{arg}...}", and optional args on acl condition
1536 JH/05 Permit multiple router/transport headers_add/remove lines.
1538 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1540 JH/07 Avoid using a waiting database for a single-message-only transport.
1541 Performance patch from Paul Fisher. Bugzilla 1262.
1543 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1546 JH/09 Add $headers_added variable, with content from use of ACL modifier
1547 add_header (but not yet added to the message). Bugzilla 199.
1549 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1550 Pulled from Bugzilla 817 by Wolfgang Breyha.
1552 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1554 (nb: this is the same fix as in Exim 4.80.1)
1556 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1559 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1562 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1564 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1565 advertise SMTP AUTH mechanism to us, instead of a generic
1566 protocol violation error. Also, make Exim more robust to bad
1567 data from the Dovecot auth socket.
1569 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1571 When a queue runner is handling a message, Exim first routes the
1572 recipient addresses, during which it prunes them based on the retry
1573 hints database. After that it attempts to deliver the message to
1574 any remaining recipients. It then updates the hints database using
1577 So if a recipient address works intermittently, it can get repeatedly
1578 deferred at routing time. The retry hints record remains fresh so the
1579 address never reaches the final cutoff time.
1581 This is a fairly common occurrence when a user is bumping up against
1582 their storage quota. Exim had some logic in its local delivery code
1583 to deal with this. However it did not apply to per-recipient defers
1584 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1586 This change adds a proper retry rule check during routing so that the
1587 final cutoff time is checked against the message's age. We only do
1588 this check if there is an address retry record and there is not a
1589 domain retry record; this implies that previous attempts to handle
1590 the address had the retry_use_local_parts option turned on. We use
1591 this as an approximation for the destination being like a local
1592 delivery, as in LMTP.
1594 I suspect this new check makes the old local delivery cutoff check
1595 redundant, but I have not verified this so I left the code in place.
1597 TF/02 Correct gecos expansion when From: is a prefix of the username.
1599 Test 0254 submits a message to Exim with the header
1603 When I ran the test suite under the user fanf2, Exim expanded
1604 the header to contain my full name, whereas it should have added
1605 a Resent-Sender: header. It erroneously treats any prefix of the
1606 username as equal to the username.
1608 This change corrects that bug.
1610 GF/01 DCC debug and logging tidyup
1611 Error conditions log to paniclog rather than rejectlog.
1612 Debug lines prefixed by "DCC: " to remove any ambiguity.
1614 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1616 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1617 Bug spotted by Jeremy Harris; was flawed since initial commit.
1618 Would have resulted in OCSP responses post-SNI triggering an Exim
1619 NULL dereference and crash.
1621 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1623 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1624 Bug detection, analysis and fix by Samuel Thibault.
1625 Bugzilla 1331, Debian bug #698092.
1627 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1629 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1630 Server implementation by Todd Lyons, client by JH.
1631 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1632 config variable "prdr_enable" controls whether the server
1633 advertises the facility. If the client requests PRDR a new
1634 acl_data_smtp_prdr ACL is called once for each recipient, after
1635 the body content is received and before the acl_smtp_data ACL.
1636 The client is controlled by both of: a hosts_try_prdr option
1637 on the smtp transport, and the server advertisement.
1638 Default client logging of deliveries and rejections involving
1639 PRDR are flagged with the string "PRDR".
1641 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1642 fclose(). Diagnosis by Todd Lyons.
1644 PP/17 Update configure.default to handle IPv6 localhost better.
1645 Patch by Alain Williams (plus minor tweaks).
1648 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1649 This is now consistent with GnuTLS, and is now documented: the
1650 previous undocumented portable approach to treating the option as
1651 unset was to force an expansion failure. That still works, and
1652 an empty string is now equivalent.
1654 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1655 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1656 not performing validation itself.
1658 PP/20 Added force_command boolean option to pipe transport.
1659 Patch from Nick Koston, of cPanel Inc.
1661 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1664 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1666 PP/21 Fix eximon continuous updating with timestamped log-files.
1667 Broken in a format-string cleanup in 4.80, missed when I repaired the
1668 other false fix of the same issue.
1669 Report and fix from Heiko Schlichting.
1672 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1673 Report from Prashanth Katuri.
1675 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1676 It's SecureTransport, so affects any MacOS clients which use the
1677 system-integrated TLS libraries, including email clients.
1679 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1680 using a MIME ACL for non-SMTP local injection.
1681 Report and assistance in diagnosis by Warren Baker.
1683 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1685 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1687 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1688 last id that failed so it may be referenced in subsequent ACL's.
1690 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1693 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1694 ldap library initialization, allowing self-signed CA's to be
1695 used. Also properly sets require_cert option later in code by
1696 using NULL (global ldap config) instead of ldap handle (per
1697 session). Bug diagnosis and testing by alxgomz.
1699 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1700 the src/util/ subdirectory.
1702 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1703 renamed to Transport Post Delivery Action by Jeremy Harris, as
1706 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1707 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1708 redis_servers = needs to be configured which will be used by the redis
1709 lookup. Patch from Warren Baker, of The Packet Hub.
1711 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1713 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1714 hostname or reverse DNS when processing a host list. Used suggestions
1715 from multiple comments on this bug.
1717 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1719 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1720 Missed a few lines, added it to make the runtest require no keyboard
1723 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1724 contains upper case chars. Make router use caseful_local_part.
1726 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1727 support when GnuTLS has been built with p11-kit.
1733 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1735 This, or similar/improved, will also be change PP/11 of 4.82.
1741 PP/01 Handle short writes when writing local log-files.
1742 In practice, only affects FreeBSD (8 onwards).
1743 Bugzilla 1053, with thanks to Dmitry Isaikin.
1745 NM/01 Bugzilla 949 - Documentation tweak
1747 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1750 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1752 PP/02 Implemented gsasl authenticator.
1754 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1756 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1757 `pkg-config foo` for cflags/libs.
1759 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1760 with rest of GSASL and with heimdal_gssapi.
1762 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1763 `pkg-config foo` for cflags/libs for the TLS implementation.
1765 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1766 properties get this fed in as external SSF. A number of robustness
1767 and debugging improvements to the cyrus_sasl authenticator.
1769 PP/08 cyrus_sasl server now expands the server_realm option.
1771 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1772 Patch by Jeremy Harris.
1774 PP/10 Added dbmjz lookup type.
1776 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1778 PP/12 MAIL args handles TAB as well as SP, for better interop with
1779 non-compliant senders.
1780 Analysis and variant patch by Todd Lyons.
1782 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1783 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1784 Patch from Dirk Mueller <dmueller@suse.com>
1786 PP/13 tls_peerdn now print-escaped for spool files.
1787 Observed some $tls_peerdn in wild which contained \n, which resulted
1788 in spool file corruption.
1790 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1791 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1792 or write after TLS renegotiation, which otherwise led to messages
1795 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1796 as a tracking header (ie: a signed header comes before the signature).
1797 Patch from Wolfgang Breyha.
1799 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1800 comma-sep list; embedded commas doubled.
1802 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1804 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1806 Report and patch from Dmitry Banschikov.
1808 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1809 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1810 failures. We appear to now support TLS1.1+ with Exim.
1812 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1813 lets Exim select keys and certificates based upon TLS SNI from client.
1814 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1815 before an outbound SMTP session. New log_selector, +tls_sni.
1817 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1818 NULL dereference. Report and patch from Alun Jones.
1820 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1821 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1822 Not seeing resolver debug output on NetBSD, but suspect this is a
1823 resolver implementation change.
1825 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1826 Left warnings. Added "eximon gdb" invocation mode.
1828 PP/21 Defaulting "accept_8bitmime" to true, not false.
1830 PP/22 Added -bw for inetd wait mode support.
1832 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1833 locate the relevant includes and libraries. Made this the default.
1835 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1836 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1838 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1839 This may cause build issues on older platforms.
1841 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1842 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1843 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1844 Added SNI support via GnuTLS too.
1845 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1847 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1849 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1850 Applied second patch from Janne, implementing suggestion to default
1851 multiple-strings-in-record handling to match SPF spec.
1853 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1855 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1856 read-only, out of scope).
1857 Patch from Wolfgang Breyha, report from Stuart Northfield.
1859 PP/29 Fix three issues highlighted by clang analyser static analysis.
1860 Only crash-plausible issue would require the Cambridge-specific
1861 iplookup router and a misconfiguration.
1862 Report from Marcin Mirosław.
1864 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1866 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1867 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1868 As part of this, removing so much warning spew let me fix some minor
1869 real issues in debug logging.
1871 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1872 assignment on my part. Fixed.
1874 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1875 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1876 Janne Snabb (who went above and beyond: thank you).
1878 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1879 string otherwise requires a connection and a bunch more work and it's
1880 relatively easy to get wrong. Should also expose TLS library linkage
1883 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1884 64-bit ${eval} (JH/03).
1886 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1887 GNU libc to support some of the 64-bit stuff, should not lead to
1888 conflicts. Defined before os.h is pulled in, so if a given platform
1889 needs to override this, it can.
1891 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1892 protection layer was required, which is not implemented.
1893 Bugzilla 1254, patch from Wolfgang Breyha.
1895 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1896 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1897 tls_dhparam take prime identifiers. Also unbreak combination of
1898 OpenSSL+DH_params+TLSSNI.
1900 PP/39 Disable SSLv2 by default in OpenSSL support.
1906 PP/01 Solaris build fix for Oracle's LDAP libraries.
1907 Bugzilla 1109, patch from Stephen Usher.
1909 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1911 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1914 TF/02 Fix a couple more cases where we did not log the error message
1915 when unlink() failed. See also change 4.74-TF/03.
1917 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1918 lock up or crash if it happened to be inside a call to libc when it
1919 got a SIGUSR1 from exiwhat.
1921 The SIGUSR1 handler appends the current process status to the process
1922 log which is later printed by exiwhat. It used to use the general
1923 purpose logging code to do this, but several functions it calls are
1924 not safe for signals.
1926 The new output code in the SIGUSR1 handler is specific to the process
1927 log, and simple enough that it's easy to inspect for signal safety.
1928 Removing some special cases also simplifies the general logging code.
1929 Removing the spurious timestamps from the process log simplifies
1932 TF/04 Improved ratelimit ACL condition.
1934 The /noupdate option has been deprecated in favour of /readonly which
1935 has clearer semantics. The /leaky, /strict, and /readonly update modes
1936 are mutually exclusive. The update mode is no longer included in the
1937 database key; it just determines when the database is updated. (This
1938 means that when you upgrade Exim will forget old rate measurements.)
1940 Exim now checks that the per_* options are used with an update mode that
1941 makes sense for the current ACL. For example, when Exim is processing a
1942 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1943 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1944 must specify per_mail/readonly. If you omit the update mode it defaults to
1945 /leaky where that makes sense (as before) or /readonly where required.
1947 The /noupdate option is now undocumented but still supported for
1948 backwards compatibility. It is equivalent to /readonly except that in
1949 ACLs where /readonly is required you may specify /leaky/noupdate or
1950 /strict/noupdate which are treated the same as /readonly.
1952 A useful new feature is the /count= option. This is a generalization
1953 of the per_byte option, so that you can measure the throughput of other
1954 aggregate values. For example, the per_byte option is now equivalent
1955 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1957 The per_rcpt option has been generalized using the /count= mechanism
1958 (though it's more complicated than the per_byte equivalence). When it is
1959 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1960 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1961 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1962 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1963 Note that using per_rcpt with a non-readonly update mode in more than
1964 one ACL will cause the recipients to be double-counted. (The per_mail
1965 and per_byte options don't have this problem.)
1967 The handling of very low rates has changed slightly. If the computed rate
1968 is less than the event's count (usually one) then this event is the first
1969 after a long gap. In this case the rate is set to the same as this event's
1970 count, so that the first message of a spam run is counted properly.
1972 The major new feature is a mechanism for counting the rate of unique
1973 events. The new per_addr option counts the number of different
1974 recipients that someone has sent messages to in the last time period. It
1975 behaves like per_rcpt if all the recipient addresses are different, but
1976 duplicate recipient addresses do not increase the measured rate. Like
1977 the /count= option this is a general mechanism, so the per_addr option
1978 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1979 example, measure the rate that a client uses different sender addresses
1980 with the options per_mail/unique=$sender_address. There are further
1981 details in the main documentation.
1983 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1985 TF/06 Removed a few PCRE remnants.
1987 TF/07 Automatically extract Exim's version number from tags in the git
1988 repository when doing development or release builds.
1990 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1991 Bugzilla 879. Patch from Paul Fisher.
1993 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1994 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1997 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1999 PP/05 Variable $av_failed, true if the AV scanner deferred.
2000 Bugzilla 1078. Patch from John Horne.
2002 PP/06 Stop make process more reliably on build failure.
2003 Bugzilla 1087. Patch from Heiko Schlittermann.
2005 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2006 Bugzilla 1089. Patch from Heiko Schlittermann.
2008 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2009 Bugzilla 1131. Patch from Holger Weiß.
2011 PP/09 Handle IPv6 addresses with SPF.
2012 Bugzilla 860. Patch from Wolfgang Breyha.
2014 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2016 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2019 PP/11 match_* no longer expand right-hand-side by default.
2020 New compile-time build option, EXPAND_LISTMATCH_RHS.
2021 New expansion conditions, "inlist", "inlisti".
2023 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2025 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2027 PP/14 fix log_write() format string regression from TF/03.
2028 Bugzilla 1152. Patch from Dmitry Isaikin.
2034 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2036 PP/02 Harmonised TLS library version reporting; only show if debugging.
2037 Layout now matches that introduced for other libraries in 4.74 PP/03.
2039 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2041 PP/04 New "dns_use_edns0" global option.
2043 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2046 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2047 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2049 TK/01 Updated PolarSSL code to 0.14.2.
2050 Bugzilla 1097. Patch from Andreas Metzler.
2052 PP/07 Catch divide-by-zero in ${eval:...}.
2053 Fixes bugzilla 1102.
2055 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2058 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2059 format-string attack -- SECURITY: remote arbitrary code execution.
2061 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2062 time unintentionally subject to list matching rules, letting the header
2063 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2064 arbitrary string expansion). This allowed for information disclosure.
2066 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2067 INT_MIN/-1 -- value coerced to INT_MAX.
2073 NM/01 Workaround for PCRE version dependency in version reporting
2076 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2077 This fixes portability to compilers other than gcc, notably
2078 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2080 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2081 makefiles for portability to HP-UX and POSIX correctness.
2083 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2084 Also via indented variable definition in the Makefile.
2085 (Debugging by Oliver Heesakkers).
2087 PP/02 Restore caching of spamd results with expanded spamd_address.
2088 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2090 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2091 Improves build reliability. Fix from: Frank Elsner
2093 NM/02 Fix wide character breakage in the rfc2047 coding
2094 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2096 NM/03 Allow underscore in dnslist lookups
2097 Fixes bug 1026. Patch from Graeme Fowler
2099 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2100 Code patches from Adam Ciarcinski of NetBSD.
2102 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2105 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2106 is logged, to avoid truncation. Patch from John Horne.
2108 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2109 Patch from Jakob Hirsch.
2111 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2112 SQL string expansion failure details.
2113 Patch from Andrey Oktyabrski.
2115 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2116 Patch from Simon Arlott.
2118 PP/09 New lookups functionality failed to compile on old gcc which rejects
2119 extern declarations in function scope.
2120 Patch from Oliver Fleischmann
2122 PP/10 Use sig_atomic_t for flags set from signal handlers.
2123 Check getgroups() return and improve debugging.
2124 Fixed developed for diagnosis in bug 927 (which turned out to be
2127 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2128 Patch from Mark Zealey.
2130 PP/12 Bugzilla 1056: Improved spamd server selection.
2131 Patch from Mark Zealey.
2133 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2134 Based on patch from Heiko Schlittermann.
2136 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2137 Patch from Uwe Doering, sign-off by Michael Haardt.
2139 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2140 variable declaration deep within a block. Bug and patch from
2143 PP/15 lookups-Makefile IRIX compatibility coercion.
2145 PP/16 Make DISABLE_DKIM build knob functional.
2147 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2148 Patch by Simon Arlott
2150 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2151 variable argument macros. Our copy now differs from upstream.
2157 TF/01 Failure to get a lock on a hints database can have serious
2158 consequences so log it to the panic log.
2160 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2161 controlled using the smtp_confirmation log selector.
2163 TF/03 Include the error message when we fail to unlink a spool file.
2165 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2166 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2167 for maintaining out-of-tree patches for some time.
2169 PP/01 Bugzilla 139: Documentation and portability issues.
2170 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2171 Handle per-OS dynamic-module compilation flags.
2173 PP/02 Let /dev/null have normal permissions.
2174 The 4.73 fixes were a little too stringent and complained about the
2175 permissions on /dev/null. Exempt it from some checks.
2176 Reported by Andreas M. Kirchwitz.
2178 PP/03 Report version information for many libraries, including
2179 Exim version information for dynamically loaded libraries. Created
2180 version.h, now support a version extension string for distributors
2181 who patch heavily. Dynamic module ABI change.
2183 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2184 privilege escalation vulnerability whereby the Exim run-time user
2185 can cause root to append content of the attacker's choosing to
2188 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2191 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2192 If dropping privileges for untrusted macros, we disabled normal logging
2193 on the basis that it would fail; for the Exim run-time user, this is not
2194 the case, and it resulted in successful deliveries going unlogged.
2195 Fixed. Reported by Andreas Metzler.
2201 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2202 only prepend for the Resent-* case. Fixes regression introduced in
2203 Exim 4.70 by NM/22 for Bugzilla 607.
2205 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2206 increasing numbers of administrators be bitten by this.
2208 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2210 PP/03 Bugzilla 994: added openssl_options main configuration option.
2212 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2214 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2216 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2218 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2219 without a peer certificate, leading to a segfault because of an
2220 assumption that peers always have certificates. Be a little more
2221 paranoid. Problem reported by Martin Tscholak.
2223 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2224 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2225 NB: ClamAV planning to remove STREAM in "middle of 2010".
2226 CL also introduces -bmalware, various -d+acl logging additions and
2227 more caution in buffer sizes.
2229 PP/09 Implemented reverse_ip expansion operator.
2231 PP/10 Bugzilla 937: provide a "debug" ACL control.
2233 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2235 PP/12 Bugzilla 973: Implement --version.
2237 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2239 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2241 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2243 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2244 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2245 ignore trailing whitespace.
2247 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2249 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2252 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2253 Notification from Dr Andrew Aitchison.
2255 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2256 ExtendedDetectionInfo response format.
2257 Notification from John Horne.
2259 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2262 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2263 XSL and documented dependency on system catalogs, with examples of how
2266 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2269 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2270 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2271 configuration file which is writeable by the Exim user or group.
2273 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2274 of configuration files to cover files specified with the -C option if
2275 they are going to be used with root privileges, not just the default
2278 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2279 option (effectively making it always true).
2281 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2282 files to be used while preserving root privileges.
2284 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2285 that rogue child processes cannot use them.
2287 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2288 run-time user, instead of root.
2290 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2291 Exim run-time user without dropping privileges.
2293 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2294 result string, instead of calling string_vformat() twice with the same
2297 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2298 for other users. Others should always drop root privileges if they use
2299 -C on the command line, even for a whitelisted configure file.
2301 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2303 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2309 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2310 $data_path, and $header_path variables; fixed documentation bugs and
2313 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2314 exipick to access non-standard spools, including the "frozen" queue
2317 NM/01 Bugzilla 965: Support mysql stored procedures.
2318 Patch from Alain Williams
2320 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2322 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2323 Patch from Andreas Metzler
2325 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2326 Patch from Kirill Miazine
2328 NM/05 Bugzilla 671: Added umask to procmail example.
2330 JJ/03 installed exipick 20100323.0, fixing doc bug
2332 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2333 directory. Notification and patch from Dan Rosenberg.
2335 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2337 TK/02 Improve log output when DKIM signing operation fails.
2339 MH/01 Treat the transport option dkim_domain as a colon separated
2340 list, not as a single string, and sign the message with each element,
2341 omitting multiple occurences of the same signer.
2343 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2344 Bugzilla 985, 986. Patch by Simon Arlott
2346 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2347 Patch by Simon Arlott
2349 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2350 MBX locking. Notification from Dan Rosenberg.
2356 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2358 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2360 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2362 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2364 NM/04 Bugzilla 915: Flag broken perl installation during build.
2370 TK/01 Added patch by Johannes Berg that expands the main option
2371 "spamd_address" if it starts with a dollar sign.
2373 TK/02 Write list of recipients to X-Envelope-Sender header when building
2374 the mbox-format spool file for content scanning (suggested by Jakob
2377 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2378 (http://www.dcc-servers.net/) support via dccifd. Activated by
2379 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2381 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2382 by Mark Daniel Reidel <mr@df.eu>.
2384 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2385 When building exim an external PCRE library is now needed -
2386 PCRE is a system library on the majority of modern systems.
2387 See entry on PCRE_LIBS in EDITME file.
2389 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2390 conversation. Added nologin parameter to request.
2391 Patch contributed by Kirill Miazine.
2393 TF/01 Do not log submission mode rewrites if they do not change the address.
2395 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2397 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2398 log files in place. Contributed by Roberto Lima.
2400 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2402 TF/03 Bugzilla 615: When checking the local_parts router precondition
2403 after a local_part_suffix or local_part_prefix option, Exim now
2404 does not use the address's named list lookup cache, since this
2405 contains cached lookups for the whole local part.
2407 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2408 Robert Millan. Documentation is in experimental-spec.txt.
2410 TF/04 Bugzilla 668: Fix parallel build (make -j).
2412 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2414 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2415 Patch provided by Jan Srzednicki.
2417 TF/05 Leading white space used to be stripped from $spam_report which
2418 wrecked the formatting. Now it is preserved.
2420 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2421 that they are available at delivery time.
2423 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2425 TF/08 TLS error reporting now respects the incoming_interface and
2426 incoming_port log selectors.
2428 TF/09 Produce a more useful error message if an SMTP transport's hosts
2429 setting expands to an empty string.
2431 NM/06 Bugzilla 744: EXPN did not work under TLS.
2432 Patch provided by Phil Pennock.
2434 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2435 Patch provided by Richard Godbee.
2437 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2438 acl_smtp_notquit, added index entry.
2440 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2441 Patch provided by Eugene Bujak.
2443 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2444 accept(). Patch provided by Maxim Dounin.
2446 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2447 Patch provided by Phil Pennock.
2449 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2451 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2452 Patch provided by Brad "anomie" Jorsch.
2454 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2455 Patch provided by Dean Brooks.
2457 TK/05 Add native DKIM support (does not depend on external libraries).
2459 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2460 Patch provided by Graeme Fowler.
2462 NM/16 Bugzilla 851: Documentation example syntax fix.
2464 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2466 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2469 NM/19 Bugzilla 745: TLS version reporting.
2470 Patch provided by Phil Pennock.
2472 NM/20 Bugzilla 167: bool: condition support.
2473 Patch provided by Phil Pennock.
2475 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2476 clients. Patch provided by Phil Pennock.
2478 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2479 Patch provided by Brad "anomie" Jorsch.
2481 NM/23 Bugzilla 687: Fix misparses in eximstats.
2482 Patch provided by Heiko Schlittermann.
2484 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2485 Patch provided by Heiko Schlittermann.
2487 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2488 plus update to original patch.
2490 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2492 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2493 Patch provided by David Brownlee.
2495 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2497 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2499 NM/30 Bugzilla 888: TLS documentation bugfixes.
2501 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2503 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2504 Unlike the original bugzilla I have changed all shell scripts in src tree.
2506 NM/33 Bugzilla 898: Transport filter timeout fix.
2507 Patch by Todd Rinaldo.
2509 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2510 Patch by Serge Demonchaux.
2512 NM/35 Bugzilla 39: Base64 decode bug fixes.
2513 Patch by Jakob Hirsch.
2515 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2517 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2519 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2521 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2527 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2528 ALT-N's libdkim that I have put here:
2529 http://duncanthrax.net/exim-experimental/
2531 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2532 were called 'true' and it seems that C99 defines that as a reserved
2533 keyword to be used with 'bool' variable types. That means you could
2534 not include C99-style headers which use bools without triggering
2535 build errors in sieve.c.
2537 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2538 as mailq or other aliases. Changed the --help handling significantly
2539 to do whats expected. exim_usage() emits usage/help information.
2541 SC/01 Added the -bylocaldomain option to eximstats.
2543 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2545 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2547 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2553 PH/01 Another patch from the Sieve maintainer.
2555 PH/02 When an IPv6 address is converted to a string for single-key lookup
2556 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2557 dots are used instead of colons so that keys in lsearch files need not
2558 contain colons. This was done some time before quoting was made available
2559 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2560 (notated using the quote facility) so as to distinguish them from IPv4
2561 keys. This meant that lookups for IP addresses in host lists did not work
2562 for iplsearch lookups.
2564 This has been fixed by arranging for IPv6 addresses to be expressed with
2565 colons if the lookup type is iplsearch. This is not incompatible, because
2566 previously such lookups could never work.
2568 The situation is now rather anomalous, since one *can* have colons in
2569 ordinary lsearch keys. However, making the change in all cases is
2570 incompatible and would probably break a number of configurations.
2572 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2575 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2576 conversion specification without a maximum field width, thereby enabling
2577 a rogue spamd server to cause a buffer overflow. While nobody in their
2578 right mind would setup Exim to query an untrusted spamd server, an
2579 attacker that gains access to a server running spamd could potentially
2580 exploit this vulnerability to run arbitrary code as the Exim user.
2582 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2583 $primary_hostname instead of what libspf2 thinks the hosts name is.
2585 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2586 a directory entry by the name of the lookup key. Previously, if a
2587 symlink pointed to a non-existing file or a file in a directory that
2588 Exim lacked permissions to read, a lookup for a key matching that
2589 symlink would fail. Now it is enough that a matching directory entry
2590 exists, symlink or not. (Bugzilla 503.)
2592 PH/03 The body_linecount and body_zerocount variables are now exported in the
2595 PH/04 Added the $dnslist_matched variable.
2597 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2598 This means they are set thereafter only if the connection becomes
2601 PH/06 Added the client_condition to authenticators so that some can be skipped
2602 by clients under certain conditions.
2604 PH/07 The error message for a badly-placed control=no_multiline_responses left
2605 "_responses" off the end of the name.
2607 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2609 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2610 (without spaces) instead of just copying the configuration text.
2612 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2614 PH/11 Added $max_received_linelength.
2616 PH/12 Added +ignore_defer and +include_defer to host lists.
2618 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2619 way in which PCRE > 7.0 is built.
2621 PH/14 Implemented queue_only_load_latch.
2623 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2624 MAIL command. The effect was to mangle the value on 64-bit systems.
2626 PH/16 Another patch from the Sieve maintainer.
2628 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2630 PH/18 If a system quota error occurred while trying to create the file for
2631 a maildir delivery, the message "Mailbox is full" was not appended to the
2632 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2633 only to a quota excession during the actual writing of the file.
2635 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2636 characters?) which causes problems in log lines. The DN values are now
2637 passed through string_printing() before being added to log lines.
2639 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2640 and InterBase are left for another time.)
2642 PH/21 Added message_body_newlines option.
2644 PH/22 Guard against possible overflow in moan_check_errorcopy().
2646 PH/23 POSIX allows open() to be a macro; guard against that.
2648 PH/24 If the recipient of an error message contained an @ in the local part
2649 (suitably quoted, of course), incorrect values were put in $domain and
2650 $local_part during the evaluation of errors_copy.
2656 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2657 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2660 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2661 issue a MAIL command.
2663 PH/02 In an ACL statement such as
2665 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2667 if a client was not listed at all, or was listed with a value other than
2668 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2669 the condition was not true (as it should be), so access was not denied.
2670 The bug was that the ! inversion was incorrectly passed on to the second
2671 item. This has been fixed.
2673 PH/03 Added additional dnslists conditions == and =& which are different from
2674 = and & when the dns lookup returns more than one IP address.
2676 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2677 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2679 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2680 FSYNC, which compiles an option called disable_fsync that allows for
2681 bypassing fsync(). The documentation is heavily laced with warnings.
2683 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2685 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2686 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2687 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2688 including adding "make clean"; (3) Added -fPIC when compiling the test
2689 dynamically loaded module, to get rid of a warning.
2691 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2692 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2693 = 0s. The bug is otherwise harmless.
2695 PH/07 There was a bug in the dovecot authenticator such that the value of
2696 $auth1 could be overwritten, and so not correctly preserved, after a
2697 successful authentication. This usually meant that the value preserved by
2698 the server_setid option was incorrect.
2700 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2702 PH/09 Installed PCRE release 7.0.
2704 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2705 run for batched SMTP input. It is now run at the start of every message
2706 in the batch. While fixing this I discovered that the process information
2707 (output by running exiwhat) was not always getting set for -bs and -bS
2708 input. This is fixed, and it now also says "batched" for BSMTP.
2710 PH/11 Added control=no_pipelining.
2712 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2713 patch, slightly modified), and move the expansion of helo_data till after
2714 the connection is made in the smtp transport (so it can use these
2717 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2719 PH/14 Added log_selector = +pid.
2721 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2723 PH/16 Add ${if forany and ${if forall.
2725 PH/17 Added dsn_from option to vary the From: line in DSNs.
2727 PH/18 Flush SMTP output before performing a callout, unless control =
2728 no_callout_flush is set.
2730 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2731 was true (the default) a successful delivery failed to delete the retry
2732 item, thus causing premature timeout of the address. The bug is now
2735 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2737 PH/21 Long custom messages for fakedefer and fakereject are now split up
2738 into multiline responses in the same way that messages for "deny" and
2739 other ACL rejections are.
2741 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2742 with slight modification.
2744 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2745 draft, changing the syntax and factoring some duplicate code".
2747 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2748 for deliveries of the second and subsequent messages over the same SMTP
2751 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2752 ${reduce, with only minor "tidies".
2754 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2756 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2757 expansion side effects.
2759 PH/27 When a message times out after an over-quota error from an Exim-imposed
2760 quota, the bounce message says "mailbox is full". This message was not
2761 being given when it was a system quota that was exceeded. It now should
2764 MH/03 Made $recipients available in local_scan(). local_scan() already has
2765 better access to the recipient list through recipients_list[], but
2766 $recipients can be useful in postmaster-provided expansion strings.
2768 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2769 in the case of a MAIL command with additional options following the
2770 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2771 were accidentally chopped off.
2773 PH/29 SMTP synchronization checks are implemented when a command is read -
2774 there is a check that no more input is waiting when there shouldn't be
2775 any. However, for some commands, a delay in an ACL can mean that it is
2776 some time before the response is written. In this time, more input might
2777 arrive, invalidly. So now there are extra checks after an ACL has run for
2778 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2779 pipelining has not been advertised.
2781 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2783 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2784 returned in the SMTP response when smtp_return_error_details was false.
2785 This has been fixed.
2787 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2788 instead of the C I/O that was originally supplied, because problems were
2789 reported on Solaris.
2791 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2792 Exim which did not show up earlier: it was assuming that a call to
2793 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2794 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2795 was a macro that became an assignment, so it seemed to work. This has
2796 changed to a proper function call with a void return, hence the compile
2797 error. Exim's code has been fixed.
2799 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2802 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2804 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2806 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2807 because it turns out to be too big or there is a timeout) there is no
2808 "Completed" line in the log. When some messages of this type were
2809 selected by exigrep, they were listed as "not completed". Others were
2810 picked up by some special patterns. I have improved the selection
2811 criteria to be more general.
2813 PH/38 The host_find_failed option in the manualroute router can now be set
2814 to "ignore", to completely ignore a host whose IP address cannot be
2815 found. If all hosts are ignored, the behaviour is controlled by the new
2816 host_all_ignored option.
2818 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2819 homing or because of multiple MX records with /mx) generated more than
2820 one IP address, and the following item turned out to be the local host,
2821 all the secondary addresses of the first item were incorrectly removed
2822 from the list, along with the local host and any following hosts (which
2823 is what is supposed to happen).
2825 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2826 whoever called Exim into the -H file. In the case of the daemon it was
2827 behaving confusingly. When first started, it used values for whoever
2828 started the daemon, but after a SIGHUP it used the Exim user (because it
2829 calls itself on a restart). I have changed the code so that it now always
2832 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2833 message are rejected with the same error (e.g. no authentication or bad
2834 sender address), and a DATA command is nevertheless sent (as can happen
2835 with PIPELINING or a stupid MUA), the error message that was given to the
2836 RCPT commands is included in the rejection of the DATA command. This is
2837 intended to be helpful for MUAs that show only the final error to their
2840 PH/42 Another patch from the Sieve maintainer.
2842 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2843 Eximstats - Fixed some broken HTML links and added missing column headers
2845 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2846 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2848 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2850 PH/43 Yet another patch from the Sieve maintainer.
2852 PH/44 I found a way to check for a TCP/IP connection going away before sending
2853 the response to the final '.' that terminates a message, but only in the
2854 case where the client has not sent further data following the '.'
2855 (unfortunately, this is allowed). However, in many cases there won't be
2856 any further data because there won't be any more messages to send. A call
2857 to select() can be used: if it shows that the input is "ready", there is
2858 either input waiting, or the socket has been closed. An attempt to read
2859 the next input character can distinguish the two cases. Previously, Exim
2860 would have sent an OK response which the client would never have see.
2861 This could lead to message repetition. This fix should cure that, at
2862 least in a lot of common cases.
2864 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2865 advertised in response to EHLO.
2871 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2872 fixed by 4.65/MH/01 (is this a record?) are fixed:
2874 (i) An empty string was always treated as zero by the numeric comparison
2875 operators. This behaviour has been restored.
2877 (ii) It is documented that the numeric comparison operators always treat
2878 their arguments as decimal numbers. This was broken in that numbers
2879 starting with 0 were being interpreted as octal.
2881 While fixing these problems I realized that there was another issue that
2882 hadn't been noticed. Values of message_size_limit (both the global option
2883 and the transport option) were treated as octal if they started with 0.
2884 The documentation was vague. These values are now always treated as
2885 decimal, and I will make that clear in the documentation.
2891 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2892 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2895 MH/01 Don't check that the operands of numeric comparison operators are
2896 integers when their expansion is in "skipping" mode (fixes bug
2897 introduced by 4.64-PH/07).
2899 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2900 child addresses, Exim now panics and dies. Previously, because the count
2901 is held in a short int, deliveries were likely to be lost. As such a
2902 large number of recipients for a single message is ridiculous
2903 (performance will be very, very poor), I have chosen to impose a limit
2904 rather than extend the field.
2910 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2911 leftover -K file (the existence of which was triggered by #402).
2912 While we were at it, introduced process PID as part of the -K
2913 filename. This should rule out race conditions when creating
2916 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2917 processing considerably. Previous code took too long for large mails,
2918 triggering a timeout which in turn triggers #401.
2920 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2921 in the DK code in transports.c. sendfile() is not really portable,
2922 hence the _LINUX specificness.
2924 TF/01 In the add_headers option to the mail command in an Exim filter,
2925 there was a bug that Exim would claim a syntax error in any
2926 header after the first one which had an odd number of characters
2929 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2930 callout verification, Exim cached a "reject" for the entire domain. This
2931 is correct for most verifications, but it is not correct for a recipient
2932 verification with use_sender or use_postmaster set, because in that case
2933 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2934 case of MAIL FROM:<> rejection from other early rejections (e.g.
2935 rejection of HELO). When verifying a recipient using a non-null MAIL
2936 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2937 Whatever the result of the callout, the value of the domain cache is
2938 left unchanged (for any other kind of callout, getting as far as trying
2939 RCPT means that the domain itself is ok).
2941 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2944 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2945 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2946 session, the daemon ignores ECONNECT errors and logs others; it now
2947 ignores EPIPE as well.
2949 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2950 (quoted-printable decoding).
2952 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2953 later the small subsequent patch to fix an introduced bug.
2955 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2957 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2959 PH/08 An error is now given if message_size_limit is specified negative.
2961 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2962 to be given (somewhat) arbitrary names.
2964 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2967 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2968 miscellaneous code fixes
2970 PH/10 Added the log_reject_target ACL modifier to specify where to log
2973 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2974 hostname. This is wrong, because it relates to the incoming message (and
2975 probably the interface on which it is arriving) and not to the outgoing
2976 callout (which could be using a different interface). This has been
2977 changed to use the value of the helo_data option from the smtp transport
2978 instead - this is what is used when a message is actually being sent. If
2979 there is no remote transport (possible with a router that sets up host
2980 addresses), $smtp_active_hostname is used.
2982 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2983 tweaks were necessary in order to get it to work (see also 21 below):
2984 (a) The code assumed that strncpy() returns a negative number on buffer
2985 overflow, which isn't the case. Replaced with Exim's string_format()
2987 (b) There were several signed/unsigned issues. I just did the minimum
2988 hacking in of casts. There is scope for a larger refactoring.
2989 (c) The code used strcasecmp() which is not a standard C function.
2990 Replaced with Exim's strcmpic() function.
2991 (d) The code set only $1; it now sets $auth1 as well.
2992 (e) A simple test gave the error "authentication client didn't specify
2993 service in request". It would seem that Dovecot has changed its
2994 interface. Fortunately there's a specification; I followed it and
2995 changed what the client sends and it appears to be working now.
2997 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3000 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3001 address A is aliased to B and C, where B exists and C does not. Without
3002 -v the output is "A verified" because verification stops after a
3003 successful redirection if more than one address is generated. However,
3004 with -v the child addresses are also verified. Exim was outputting "A
3005 failed to verify" and then showing the successful verification for C,
3006 with its parentage. It now outputs "B failed to verify", showing B's
3007 parentage before showing the successful verification of C.
3009 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3010 look up a TXT record in a specific list after matching in a combined
3013 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3014 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3015 they consult the DNS. I had assumed they would set it the way they
3016 wanted; and indeed my experiments on Linux seem to show that in some
3017 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3018 To be on the safe side, however, I have now made the interface to
3019 host_find_byname() similar to host_find_bydns(), with an argument
3020 containing the DNS resolver options. The host_find_byname() function now
3021 sets these options at its start, just as host_find_bydns() does. The smtp
3022 transport options dns_qualify_single and dns_search_parents are passed to
3023 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3024 of host_find_byname() use the default settings of RES_DEFNAMES
3025 (qualify_single) but not RES_DNSRCH (search_parents).
3027 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3028 spool_read_header() do less string testing, by means of a preliminary
3029 switch on the second character of optional "-foo" lines. (This is
3030 overdue, caused by the large number of possibilities that now exist.
3031 Originally there were few.) While I was there, I also converted the
3032 str(n)cmp tests so they don't re-test the leading "-" and the first
3033 character, in the hope this might squeeze out yet more improvement.
3035 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3036 flag allowing group syntax was set by the header_syntax check but not
3037 turned off, possible causing trouble later; (2) The flag was not being
3038 set at all for the header_verify test, causing "group"-style headers to
3039 be rejected. I have now set it in this case, and also caused header_
3040 verify to ignore an empty address taken from a group. While doing this, I
3041 came across some other cases where the code for allowing group syntax
3042 while scanning a header line wasn't quite right (mostly, not resetting
3043 the flag correctly in the right place). These bugs could have caused
3044 trouble for malformed header lines. I hope it is now all correct.
3046 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3047 with the "reply" argument non-NULL. The code, however (which originally
3048 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3049 but it didn't always do it. This confused somebody who was copying the
3050 code for some other use. I have removed all the tests.
3052 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3053 feature that was used to support insecure browsers during the U.S. crypto
3054 embargo. It requires special client support, and Exim is probably the
3055 only MTA that supported it -- and would never use it because real RSA is
3056 always available. This code has been removed, because it had the bad
3057 effect of slowing Exim down by computing (never used) parameters for the
3058 RSA_EXPORT functionality.
3060 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3061 authenticator to fail if there's a tab character in the incoming data
3062 (there should never be unless someone is messing about, as it's supposed
3063 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3064 if the connection is using TLS or if the remote IP is the same as the
3065 local IP, and the "valid-client-cert option" if a client certificate has
3068 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3069 authenticators. This can be used for authorization after authentication
3070 succeeds. (In the case of plaintext, it servers for both authentication
3073 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3074 if any retry times were supplied.
3076 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3077 connection, where there is no client IP address to check. In this
3078 situation, the verify now always succeeds.
3080 PH/25 Applied John Jetmore's -Mset patch.
3082 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3084 PH/27 In a string expansion for a processed (not raw) header when multiple
3085 headers of the same name were present, leading whitespace was being
3086 removed from all of them, but trailing whitespace was being removed only
3087 from the last one. Now trailing whitespace is removed from each header
3088 before concatenation. Completely empty headers in a concatenation (as
3089 before) are ignored.
3091 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3092 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3094 PH/29 [Removed. This was a change that I later backed out, and forgot to
3095 correct the ChangeLog entry (that I had efficiently created) before
3096 committing the later change.]
3098 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3099 address errors (4xx response to RCPT) over the same connection as other
3100 messages routed to the same hosts. Such deliveries are always "forced",
3101 so retry times are not inspected. This resulted in far too many retries
3102 for the affected addresses. The effect occurred only when there were more
3103 hosts than the hosts_max_try setting in the smtp transport when it had
3104 the 4xx errors. Those hosts that it had tried were not added to the list
3105 of hosts for which the message was waiting, so if all were tried, there
3106 was no problem. Two fixes have been applied:
3108 (i) If there are any address or message errors in an SMTP delivery, none
3109 of the hosts (tried or untried) are now added to the list of hosts
3110 for which the message is waiting, so the message should not be a
3111 candidate for sending over the same connection that was used for a
3112 successful delivery of some other message. This seems entirely
3113 reasonable: after all the message is NOT "waiting for some host".
3114 This is so "obvious" that I'm not sure why it wasn't done
3115 previously. Hope I haven't missed anything, but it can't do any
3116 harm, as the worst effect is to miss an optimization.
3118 (ii) If, despite (i), such a delivery is accidentally attempted, the
3119 routing retry time is respected, so at least it doesn't keep
3120 hammering the server.
3122 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3123 in ${readsocket because some servers need this prod.
3125 PH/32 Added some extra debug output when updating a wait-xxx database.
3127 PH/33 The hint "could be header name not terminated by colon", which has been
3128 given for certain expansion errors for a long time, was not being given
3129 for the ${if def:h_colon_omitted{... case.
3131 PH/34 The spec says: "With one important exception, whenever a domain list is
3132 being scanned, $domain contains the subject domain." There was at least
3133 one case where this was not true.
3135 PH/35 The error "getsockname() failed: connection reset by peer" was being
3136 written to the panic log as well as the main log, but it isn't really
3137 panic-worthy as it just means the connection died rather early on. I have
3138 removed the panic log writing for the ECONNRESET error when getsockname()
3141 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3142 runs only) independently of the message's sender address. This meant
3143 that, if the 4xx error was in fact related to the sender, a different
3144 message to the same recipient with a different sender could confuse
3145 things. In particular, this can happen when sending to a greylisting
3146 server, but other circumstances could also provoke similar problems.
3147 I have changed the default so that the retry time for these errors is now
3148 based a combination of the sender and recipient addresses. This change
3149 can be overridden by setting address_retry_include_sender=false in the
3152 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3153 remote server are returned as part of bounce messages. This was not
3154 happening for LMTP over a pipe (the lmtp transport), but now it is the
3155 same for both kinds of LMTP.
3157 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3158 in header lines that were in fact CNAMEs. This is no longer the case.
3160 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3161 and queue runs started by the daemon processed all messages. This has
3162 been fixed so that -R and -S can now usefully be given with -q<time>.
3164 PH/40 Import PCRE release 6.7 (fixes some bugs).
3166 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3168 PH/42 Give an error if -q is specified more than once.
3170 PH/43 Renamed the variables $interface_address and $interface_port as
3171 $received_ip_address and $received_port, to make it clear that these
3172 values apply to message reception, and not to the outgoing interface when
3173 a message is delivered. (The old names remain recognized, of course.)
3175 PH/44 There was no timeout on the connect() call when using a Unix domain
3176 socket in the ${readsocket expansion. There now is.
3178 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3179 be meaningful with "accept".
3181 SC/01 Eximstats V1.43
3182 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3184 SC/02 Eximstats V1.44
3185 Use a glob alias rather than an array ref in the generated
3186 parser. This improves both readability and performance.
3188 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3189 Collect SpamAssassin and rejection statistics.
3190 Don't display local sender or destination tables unless
3191 there is data to show.
3192 Added average volumes into the top table text output.
3194 SC/04 Eximstats V1.46
3195 Collect data on the number of addresses (recipients)
3196 as well as the number of messages.
3198 SC/05 Eximstats V1.47
3199 Added 'Message too big' to the list of mail rejection
3200 reasons (thanks to Marco Gaiarin).
3202 SC/06 Eximstats V1.48
3203 Mainlog lines which have GMT offsets and are too short to
3204 have a flag are now skipped.
3206 SC/07 Eximstats V1.49 (Alain Williams)
3207 Added the -emptyok flag.
3209 SC/08 Eximstats V1.50
3210 Fixes for obtaining the IP address from reject messages.
3212 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3213 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3214 whitespace changes from 4.64-PH/27
3216 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3219 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3220 are found, allow negative numbers in numeric criteria)
3222 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3224 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3225 to match changes made in 4.64-PH/43
3227 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3229 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3230 "domain" is actually an IP address, and force a failure. This locks out
3231 those revolvers/nameservers that support "A-for-A" lookups, in
3232 contravention of the specifications.
3234 PH/48 When a host name was looked up from an IP address, and the subsequent
3235 forward lookup of the name timed out, the host name was left in
3236 $sender_host_name, contrary to the specification.
3238 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3239 restricted to single-key lookups, Exim was not diagnosing an error if
3240 * or *@ was used with a query-style lookup.
3242 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3244 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3245 long ago, but noone interested enough thought of it. Let's just say that
3246 the "1.1" means that there are some new functions that weren't there at
3247 some point in the past.
3249 PH/51 Error processing for expansion failure of helo_data from an smtp
3250 transport during callout processing was broken.
3252 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3253 tested/used via the -bh/-bhc/-bs options.
3255 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3256 bug, fixed in subsequent PCRE releases).
3258 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3259 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3261 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3267 SC/01 Use a glob alias rather than an array ref in eximstats generated
3268 parser. This improves both readability and performance.
3270 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3271 Don't display local sender or destination tables in eximstats unless
3272 there is data to show.
3273 Added average volumes into the eximstats top table text output.
3275 SC/03 Collect data on the number of addresses (recipients) as well
3276 as the number of messages in eximstats.
3278 TF/01 Correct an error in the documentation for the redirect router. Exim
3279 does (usually) call initgroups() when daemonizing.
3281 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3282 with consistent privilege compared to when running as a daemon.
3284 TF/03 Note in the spec that $authenticated_id is not set for local
3285 submissions from trusted users.
3287 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3288 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3290 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3291 by adding some example configuration directives to the default
3292 configuration file. A little bit of work is required to uncomment the
3293 directives and define how usernames and passwords are checked, but
3294 there is now a framework to start from.
3296 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3297 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3298 without this. I don't know how relevant this is to other LDAP libraries.
3300 PH/02 Add the verb name to the "unknown ACL verb" error.
3302 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3304 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3306 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3307 directory not expanded when it should be if an expanded home directory
3308 was set for the address (which is overridden by the transport).
3310 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3313 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3314 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3315 because it is too late at that time, and has no effect.
3317 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3318 security issue with \' (bugzilla #107). I could not use the
3319 PQescapeStringConn() function, because it needs a PGconn value as one of
3322 PH/08 When testing addresses using -bt, indicate those final addresses that
3323 are duplicates that would not cause an additional delivery. At least one
3324 person was confused, thinking that -bt output corresponded to deliveries.
3325 (Suppressing duplicates isn't a good idea as you lose the information
3326 about possibly different redirections that led to the duplicates.)
3328 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3329 systems where poll() doesn't work, in particular OS X.
3331 PH/10 Added more information to debugging output for retry time not reached.
3333 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3334 operations in malware.c.
3336 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3339 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3340 syslog_duplication set false, log lines that would normally be written
3341 both the the main log and to the reject log were not written to syslog at
3344 PH/14 In the default configuration, change the use of "message" in ACL warn
3345 statements to "add_header".
3347 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3348 not followed by a command (e.g. "seen endif").
3350 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3351 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3354 PH/17 Added extra conditions to the default value of delay_warning_condition
3358 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3359 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3360 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3363 The Auto-Submitted: and various List- headers are standardised, whereas I
3364 don't think Precedence: ever was.
3366 PH/18 Refactored debugging code in route_finduser() to show more information,
3367 in particular, the error code if getpwnam() issues one.
3369 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3370 This is apparently needed in addition to the PH/07 change above to avoid
3371 any possible encoding problems.
3373 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3374 but not after initializing Perl.
3376 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3377 output them only if debugging. By default they are written stderr,
3378 apparently, which is not desirable.
3380 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3383 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3386 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3388 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3389 authenticated or an ident call has been made. Suppress the default
3390 values for $authenticated_id and $authenticated_sender (but permit -oMai
3391 and -oMas) when testing with -bh.
3393 PH/24 Re-jigged the order of the tests in the default configuration so that the
3394 tests for valid domains and recipients precede the DNS black list and CSA
3395 tests, on the grounds that those ones are more expensive.
3397 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3398 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3399 This bug exists in every version of Exim that I still have, right back to
3402 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3403 However, an attempt to turn on case-sensitivity in a regex key by
3404 including (?-i) didn't work because the subject string was already
3405 lowercased, and the effects were non-intuitive. It turns out that a
3406 one-line patch can be used to allow (?-i) to work as expected.
3412 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3413 other effects) broke the use of negated acl sub-conditions.
3415 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3418 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3419 "Deny" causes Exim to reject the incoming connection with a 554 error.
3420 Unfortunately, if there is a major crisis, such as a disk failure,
3421 tcp-wrappers gives "deny", whereas what one would like would be some
3422 kind of temporary error. A kludge has been added to help with this.
3423 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3424 554 error is used if errno is still zero or contains ENOENT (which occurs
3425 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3428 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3430 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3431 errors. Otherwise a message that provokes a temporary error (when other
3432 messages do not) can cause a whole host to time out.
3434 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3435 addresses were routed directly to files or pipes from a redirect router.
3436 File deliveries just didn't batch; pipe deliveries might have suffered
3439 PH/06 A failure to get a lock for a hints database would erroneously always say
3440 "Failed to get write lock", even when it was really a read lock.
3442 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3443 of 0600. This has been changed to use the value of the lockfile_mode
3444 option (which defaults to 0600).
3446 PH/08 Applied small patch from the Sieve maintainer.
3448 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3449 folder from quota calculations, a direct delivery into this folder messed
3450 up the contents of the maildirsize file. This was because the regex was
3451 used only to exclude .Trash (or whatever) when the size of the mailbox
3452 was calculated. There was no check that a delivery was happening into an
3453 excluded directory. This bug has been fixed by ignoring all quota
3454 processing for deliveries into excluded directories.
3456 PH/10 Added the maildirfolder_create_regex option to appendfile.
3462 PH/01 The code for finding all the local interface addresses on a FreeBSD
3463 system running IPv6 was broken. This may well have applied to all BSD
3464 systems, as well as to others that have similar system calls. The broken
3465 code found IPv4 interfaces correctly, but gave incorrect values for the
3466 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3467 that it would not match correctly against @[] and not recognize the IPv6
3470 PH/02 The ipliteral router was not recognizing addresses of the form user@
3471 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3473 PH/03 Added disable_ipv6.
3475 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3476 decoded form, because it is most often used to construct To: headers
3477 lines in autoreplies, and the decoded form may well be syntactically
3478 invalid. However, $reply_address has leading white space removed, and all
3479 newlines turned into spaces so that the autoreply transport does not
3482 PH/05 If group was specified without a user on a router, and no group or user
3483 was specified on a transport, the group from the router was ignored.
3485 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3486 for visible compile-time settings that can be used to change these
3487 numbers, for those that want even more. Backwards compatibility with old
3488 spool files has been maintained. However, going back to a previous Exim
3489 release will lost any variables that are in spool files.
3491 PH/07 Two small changes when running in the test harness: increase delay when
3492 passing a TCP/IP connection to a new process, in case the original
3493 process has to generate a bounce, and remove special handling of
3494 127.0.0.2 (sic), which is no longer necessary.
3496 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3497 be the same on different OS.
3499 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3502 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3503 whether --show-vars was specified or not
3505 JJ/02 exipick: Added support for new ACL variable spool format introduced
3508 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3509 syntactically invalid From: or Reply-to: line, and a filter used this to
3510 generate an autoreply, and therefore failed to obtain an address for the
3511 autoreply, Exim could try to deliver to a non-existent relative file
3512 name, causing unrelated and misleading errors. What now happens is that
3513 it logs this as a hard delivery error, but does not attempt to create a
3516 PH/11 The exinext utility has a -C option for testing purposes, but although
3517 the given file was scanned by exinext itself; it wasn't being passed on
3518 when Exim was called.
3520 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3521 an end-of-file indication when reading a command response.
3523 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3524 compiled. In many other places in Exim, IPv6 addresses are always
3525 recognized, so I have changed this. It also means that IPv4 domain
3526 literals of the form [IPV4:n.n.n.n] are now always recognized.
3528 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3529 used if the router is not running as root, for example, when verifying at
3530 ACL time, or when using -bh. The debugging output from this situation was
3531 non-existent - all you got was a failure to exec. I have made two
3534 (a) Failures to set uid/gid, the current directory, or a process leader
3535 in a subprocess such as that created by queryprogram now generate
3536 suitable debugging output when -d is set.
3538 (b) The queryprogram router detects when it is not running as root,
3539 outputs suitable debugging information if -d is set, and then runs
3540 the subprocess without attempting to change uid/gid.
3542 PH/15 Minor change to Makefile for building test_host (undocumented testing
3545 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3546 additional section of a DNS packet that returns MX or SRV records.
3547 Instead, it always explicitly searches for A/AAAA records. This avoids
3548 major problems that occur when a DNS server includes only records of one
3549 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3550 fixed another bug: if SRV records were looked up and the corresponding
3551 address records were *not* found in the additional section, the port
3552 values from the SRV records were lost.
3554 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3555 using the correct key (the original address) when searching the retry
3556 rules in order to find which one to use for generating the retry hint.
3558 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3559 adding the default one. Similarly, if it contains a Reply-To: header, the
3560 errors_reply_to option, if set, is not used.
3562 PH/19 When calculating a retry time, Exim used to measure the "time since
3563 failure" by looking at the "first failed" field in the retry record. Now
3564 it does not use this if it is later than than the arrival time of the
3565 message. Instead it uses the arrival time. This makes for better
3566 behaviour in cases where some deliveries succeed, thus re-setting the
3567 "first failed" field. An example is a quota failure for a huge message
3568 when small messages continue to be delivered. Without this change, the
3569 "time since failure" will always be short, possible causing more frequent
3570 delivery attempts for the huge message than are intended.
3571 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3573 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3574 $1, $2, $3) because the numerical variables can be reset during some
3575 expansion items (e.g. "match"), thereby losing the authentication data.
3577 PH/21 Make -bV show the size of off_t variables so that the test suite can
3578 decide whether to run tests for quotas > 2G.
3580 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3581 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3582 filecount value is greater than 2G or if a quota value is greater than 2G
3583 on a system where the size of off_t is not greater than 4, a panic error
3586 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3587 never match. The debug and -bh output now contains an explicit error
3588 message indicating a malformed IPv4 address or mask.
3590 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3591 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3592 PH/23 above applies.
3594 PH/25 Do not write to syslog when running in the test harness. The only
3595 occasion when this arises is a failure to open the main or panic logs
3596 (for which there is an explicit test).
3598 PH/26 Added the /no_tell option to "control=freeze".
3600 PH/27 If a host name lookup failed very early in a connection, for example, if
3601 the IP address matched host_lookup and the reverse lookup yielded a name
3602 that did not have a forward lookup, an error message of the form "no IP
3603 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3604 could be logged. Now it outputs the IP address instead of "NULL".
3606 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3607 allows the sender and the authenticated sender to be set when
3608 submitting a message from within Exim. Since child_open_exim() is
3609 documented for local_scan(), the new function should be too.
3611 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3612 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3613 results in an empty string is now treated as unset.
3615 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3617 PH/31 Added sender_verify_fail logging option.
3619 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3620 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3621 tidied the source and removed it altogether.
3623 PH/33 When a queue run was abandoned because the load average was too high, a
3624 log line was always written; now it is written only if the queue_run log
3625 selector is set. In addition, the log line for abandonment now contains
3626 information about the queue run such as the pid. This is always present
3627 in "start" and "stop" lines but was omitted from the "abandon" line.
3629 PH/34 Omit spaces between a header name and the colon in the error message that
3630 is given when verify = headers_syntax fails (if there are lots of them,
3631 the message gets confusing).
3633 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3634 names, as there are now some PTR records that contain slashes. This check
3635 is only to protect against broken name servers that fall over on strange
3636 characters, so the fact that it applies to all lookups doesn't matter.
3638 PH/36 Now that the new test suite is complete, we can remove some of the
3639 special code in Exim that was needed for the old test suite. For example,
3640 sorting DNS records because real resolvers return them in an arbitrary
3641 order. The new test suite's fake resolver always returns records in the
3644 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3645 bounces) except when queue_only is set, to avoid logging races between
3646 the different processes.
3648 PH/38 Panic-die if .include specifies a non-absolute path.
3650 PH/39 A tweak to the "H" retry rule from its user.
3652 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3653 a label. They prevented compilation on older perls.
3655 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3656 a warning to be raised on newish perls.
3658 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3659 on queue. Changes to match documented behaviour of showing count of
3660 messages matching specified criteria.
3662 PH/40 Changed the default ident timeout from 30s to 5s.
3664 PH/41 Added support for the use of login_cap features, on those BSD systems
3665 that have them, for controlling the resources used by pipe deliveries.
3667 PH/42 The content-scanning code uses fopen() to create files in which to put
3668 message data. Previously it was not paying any attention to the mode of
3669 the files. Exim runs with umask(0) because the rest of the code creates
3670 files with open(), and sets the required mode explicitly. Thus, these
3671 files were ending up world-writeable. This was not a big issue, because,
3672 being within the spool directory, they were not world-accessible. I have
3673 created a function called modefopen, which takes an additional mode
3674 argument. It sets umask(777), creates the file, chmods it to the required
3675 mode, then resets the umask. All the relevant calls to fopen() in the
3676 content scanning code have been changed to use this function.
3678 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3679 to 24 hours. This avoids potential overflow problems when processing G
3680 and H retry rules. I suspect nobody ever tinkers with this value.
3682 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3684 PH/45 When the plaintext authenticator is running as a client, the server's
3685 challenges are checked to ensure they are valid base64 strings. By
3686 default, the authentication attempt is cancelled if an invalid string is
3687 received. Setting client_ignore_invalid_base64 true ignores these errors.
3688 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3689 they are received. Thus, the responses can be made to depend on the
3690 challenges. If an invalid string is ignored, an empty string is placed in
3693 PH/46 Messages that are created by the autoreply transport now contains a
3694 References: header, in accordance with RFCs 2822 and 3834.
3696 PH/47 Added authenticated_sender_force to the smtp transport.
3698 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3700 PH/49 Installed latest patch from the Sieve maintainer.
3702 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3703 was also set, the appendfile transport was unnecessarily scanning a
3704 directory of message files (e.g. for maildir delivery) to find the count
3705 of files (along with the size), even though it did not need this
3706 information. It now does the scan only if it needs to find either the
3707 size of the count of files.
3709 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3711 PH/52 Two bugs concerned with error handling when the smtp transport is
3714 (i) Exim was not creating retry information for temporary errors given
3715 for individual recipients after the DATA command when the smtp transport
3716 was used in LMTP mode. This meant that they could be retried too
3717 frequently, and not timed out correctly.
3719 (ii) Exim was setting the flag that allows error details to be returned
3720 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3721 recipients that were returned after the DATA command.
3723 PH/53 This is related to PH/52, but is more general: for any failing address,
3724 when detailed error information was permitted to be returned to the
3725 sender, but the error was temporary, then after the final timeout, only
3726 "retry timeout exceeded" was returned. Now it returns the full error as
3727 well as "retry timeout exceeded".
3729 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3730 do this, and (what is worse) MTAs that accept it.
3732 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3733 will now be deprecated.
3735 PH/56 New os.c-cygwin from the Cygwin maintainer.
3737 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3738 formats (previously only available in exim formats via -bpr, -bpru,
3739 and -bpra. Now also available in native and exiqgrep formats)
3741 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3742 with very large, slow to parse queues
3744 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3746 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3748 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3749 responses to authentication challenges, though it was showing the
3750 challenges; (ii) I've removed the CR characters from the debug output for
3753 PH/58 Allow for the insertion of a newline as well as a space when a string
3754 is turned into more than one encoded-word during RFC 2047 encoding. The
3755 Sieve code now uses this.
3757 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3758 data_4xx, lost_connection, tls_required.
3760 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3761 message was being sent as an SMTP response.
3763 PH/61 Add -l and -k options to exicyclog.
3765 PH/62 When verifying, if an address was redirected to one new address, so that
3766 verification continued, and the new address failed or deferred after
3767 having set something in $address_data, the value of $address_data was not
3768 passed back to the ACL. This was different to the case when no
3769 redirection occurred. The value is now passed back in both cases.
3771 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3772 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3773 use login_cap.h, so on its own it isn't the distinguishing feature. The
3774 new name refers directly to the setclassresources() function.
3776 PH/65 Added configuration files for NetBSD3.
3778 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3780 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3781 is preferred over IPv4.
3783 PH/68 The bounce_return_message and bounce_return_body options were not being
3784 honoured for bounces generated during the reception of non-SMTP messages.
3785 In particular, this applied to messages rejected by the ACL. This bug has
3786 been fixed. However, if bounce_return_message is true and bounce_return_
3787 body is false, the headers that are returned for a non-SMTP message
3788 include only those that have been read before the error was detected.
3789 (In the case of an ACL rejection, they have all been read.)
3791 PH/69 The HTML version of the specification is now built in a directory called
3792 spec_html instead of spec.html, because the latter looks like a path with
3793 a MIME-type, and this confuses some software.
3795 PH/70 Catch two compiler warnings in sieve.c.
3797 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3798 function verify_get_ident() calls ip_connect() to connect a socket, but
3799 if the "connect()" function timed out, ip_connect() used to close the
3800 socket. However, verify_get_ident() also closes the socket later, and in
3801 between Exim writes to the log, which may get opened at this point. When
3802 the socket was closed in ip_connect(), the log could get the same file
3803 descriptor number as the socket. This naturally causes chaos. The fix is
3804 not to close the socket in ip_connect(); the socket should be closed by
3805 the function that creates it. There was only one place in the code where
3806 this was missing, in the iplookup router, which I don't think anybody now
3807 uses, but I've fixed it anyway.
3809 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3810 well as to direct DNS lookups. Otherwise the handling of names in host
3811 lists is inconsistent and therefore confusing.
3817 PH/01 Two changes to the default runtime configuration:
3819 (1) Move the checks for relay_from_hosts and authenticated clients from
3820 after to before the (commented out) DNS black list checks.
3822 (2) Add control=submission to the relay_from_hosts and authenticated
3823 clients checks, on the grounds that messages accepted by these
3824 statements are most likely to be submissions.
3826 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3828 (1) Generate an error if the third argument for the ${prvs expansion is
3831 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3834 (3) Reset the variables that are obtained from the first argument of
3835 ${prvscheck and used in the second argument before leaving the code,
3836 because their memory is reclaimed, so using them afterwards may do
3839 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3840 one (it's much easier than Tom thought :-).
3842 (5) Because of (4), we can now allow for the use of $prvscheck_result
3843 inside the third argument.
3845 PH/03 For some reason, the default setting of PATH when running a command from
3846 a pipe transport was just "/usr/bin". I have changed it to
3849 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3850 anything to be listed in the output from -bV.
3852 PH/05 When a filter generated an autoreply, the entire To: header line was
3853 quoted in the delivery log line, like this:
3855 => >A.N.Other <ano@some.domain> <original@ddress> ...
3857 This has been changed so that it extracts the operative address. There
3858 may be more than one such address. If so, they are comma-separated, like
3861 => >ano@some.domain,ona@other.domain <original@ddress> ...
3863 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3864 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3865 not being looked up in the rDNS to get a host name, Exim was showing the
3866 IP address twice in Received: lines, even though the IP addresses were
3867 identical. For example:
3869 Received: from [1.2.3.4] (helo=[1.2.3.4])
3871 However, if the real host name was known, it was omitting the HELO data
3872 if it matched the actual IP address. This has been tidied up so that it
3873 doesn't show the same IP address twice.
3875 PH/07 When both +timestamp and +memory debugging was on, the value given by
3876 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3877 called by the debug printing, thereby overwriting the timestamp buffer.
3878 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3880 PH/08 When the original message was included in an autoreply transport, it
3881 always said "this is a copy of the message, including all the headers",
3882 even if body_only or headers_only was set. It now gives an appropriate
3885 PH/09 Applied a patch from the Sieve maintainer which:
3887 o fixes some comments
3888 o adds the (disabled) notify extension core
3889 o adds some debug output for the result of if/elsif tests
3890 o points to the current vacation draft in the documentation
3891 and documents the missing references header update
3895 o fixes a bug in processing the envelope test (when testing
3896 multiple envelope elements, the last element determined the
3899 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3900 Electronic Mail") by including:
3902 Auto-submitted: auto-generated
3904 in the messages that it generates (bounce messages and others, such as
3905 warnings). In the case of bounce messages for non-SMTP messages, there was
3906 also a typo: it was using "Auto_submitted" (underscore instead of
3907 hyphen). Since every message generated by Exim is necessarily in response
3908 to another message, thes have all been changed to:
3910 Auto-Submitted: auto-replied
3912 in accordance with these statements in the RFC:
3914 The auto-replied keyword:
3916 - SHOULD be used on messages sent in direct response to another
3917 message by an automatic process,
3919 - MUST NOT be used on manually-generated messages,
3921 - MAY be used on Delivery Status Notifications (DSNs) and Message
3922 Disposition Notifications (MDNs),
3924 - MUST NOT be used on messages generated by automatic or periodic
3925 processes, except for messages which are automatic responses to
3928 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3929 to the default Received: header definition.
3931 PH/12 Added log selector acl_warn_skipped (default on).
3933 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3934 variables because (a) they are in the wrong storage pool and (b) even if
3935 they were copied, it wouldn't work properly because of the caching.
3937 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3938 checking when decoding. Apparently there are clients that generate
3939 overlong encoded strings. Why am I not surprised?
3941 PH/15 If the first argument of "${if match_address" was not empty, but did not
3942 contain an "@" character, Exim crashed. Now it writes a panic log message
3943 and treats the condition as false.
3945 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3947 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3948 extension "envelope-auth". The code is finished and in agreement with
3949 other implementations, but there is no documentation so far and in fact,
3950 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3951 not changing the active code.
3953 Print executed "if" and "elsif" statements when debugging is used. This
3954 helps a great deal to understand what a filter does.
3956 Document more things not specified clearly in RFC3028. I had all this
3957 sorted out, when out of a sudden new issues came to my mind. Oops."
3959 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3962 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3963 canonical form (as documented). However, after a host name lookup from
3964 the IP address, check_host() was doing a simple string comparison with
3965 addresses acquired from the DNS when checking that the found name did
3966 have the original IP as one of its addresses. Since any found IPv6
3967 addresses are likely to be in abbreviated form, the comparison could
3968 fail. Luckily, there already exists a function for doing the comparison
3969 by converting both addresses to binary, so now that is used instead of
3970 the text comparison.
3972 PH/20 There was another similar case to PH/19, when a complete host name was
3973 given in a host list; looking up its IP address could give an abbreviated
3974 form, whereas the current host's name might or might not be abbreviated.
3975 The same fix has been applied.
3981 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3982 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3985 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3986 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3988 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3990 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3991 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3992 Also, for "Auto-Submitted", treat anything other than "no" as
3993 non-personal, in accordance with RFC 3834. (Previously it treated
3994 anything starting "auto-" as non-personal.)
3996 TF/01 The control=submission/name=... option had a problem with syntax
3997 errors if the name included a slash character. The /name= option
3998 now slurps the rest of the string, so it can include any characters
3999 but it must come last in the list of options (after /sender_retain
4002 PH/05 Some modifications to the interface to the fake nameserver for the new
4010 TK/01 Added the "success_on_redirect" address verification option. See
4011 NewStuff for rationale and an example.
4013 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4015 PH/02 Patch to exigrep to allow it to work on syslog lines.
4017 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4018 fread() to skip over the body file's header line, because in Cygwin the
4019 header line is locked and is inaccessible.
4021 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4022 co-exist for some time) to make it clear that it is the Exim ID that is
4023 referenced, not the Message-ID: header line.
4025 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4026 string_format() function, because snprintf() does not exist on all
4029 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4030 ${stat: expansion item.
4032 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4033 protocol synchronization error", to keep the pedants happy.
4035 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4036 well as for IRIX systems, when gcc is being used. See the host.c source
4039 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4041 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4044 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4045 transport and to the smtp transport in LMTP mode.
4047 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4049 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4050 run a filter in a subprocess. This could lead to confusion in subsequent
4051 lookups in the parent process. There should also be a search_tidyup() at
4052 the end of the subprocess.
4054 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4055 only if the host matched helo_try_verify_hosts, which caused the
4056 verification to occur when the EHLO/HELO command was issued. The ACL just
4057 tested the remembered result. Now, if a previous verification attempt has
4058 not happened, "verify = helo" does it there and then.
4060 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4062 TK/03 Fix log output including CR from clamd.
4064 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4065 exist provoked a memory error which could cause a segfault.
4067 PH/15 Installed PCRE 6.2
4069 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4071 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4072 of the problem. Specifically, suggested +O2 rather than +O1 for the
4075 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4077 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4078 record, the port was not correctly logged when the outgoing_port log
4079 selector was set (it logged the transort's default port).
4081 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4082 fallback_hosts, and "hosts" in the smtp transport.
4084 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4085 host errors such as "Connection refused".
4087 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4088 authentication with radiusclient 0.4.9:
4090 - Error returned from rc_read_config was caught wrongly
4091 - Username/password not passed on to radius server due to wrong length.
4093 The presumption is that some radiusclient API changes for 4.51/PH/17
4094 were not taken care of correctly. The code is still untested by me (my
4095 Linux distribution still has 0.3.2 of radiusclient), but it was
4096 contributed by a Radius user.
4098 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4099 expanding the "port" option of the smtp transport.
4101 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4102 while reading a MIME header. Thanks to Tom Hughes for a patch.
4104 PH/24 Include config.h inside local_scan.h so that configuration settings are
4107 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4108 that in an ACL for RCPT (for example), you can examine exactly what was
4111 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4112 commands, but it was not correctly comparing the address with the actual
4113 client host address. Thus, it would show the EHLO address in Received:
4114 header lines when this was not necessary.
4116 PH/27 Added the % operator to ${eval:}.
4118 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4119 it should be ignoring failures (because with -C, for example, it has lost
4120 privilege). It wasn't ignoring creation failures other than "already
4123 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4126 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4127 because an input line was too long, either on its own, or by virtue of
4128 too many continuations, the temporary file was not being removed, and the
4129 return code was incorrect.
4131 PH/31 Missing "BOOL" in function definition in filtertest.c.
4133 PH/32 Applied Sieve patches from the maintainer.
4135 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4137 PH/33 Added "verify = not_blind".
4139 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4140 Local/Makefile (with some defaults set). These are used in built scripts
4141 such as exicyclog, but they have never been used in the exim_install
4142 script (though there are many overriding facilities there). I have
4143 arranged that the exim_install script now takes note of these two
4146 PH/35 Installed configuration files for Dragonfly.
4148 PH/36 When a locally submitted message by a trusted user did not contain a
4149 From: header, and the sender address was obtained from -f or from an SMTP
4150 MAIL command, and the trusted user did not use -F to supply a sender
4151 name, $originator_name was incorrectly used when constructing a From:
4152 header. Furthermore, $originator_name was used for submission mode
4153 messages from external hosts without From: headers in a similar way,
4154 which is clearly wrong.
4156 PH/37 Added control=suppress_local_fixups.
4158 PH/38 When log_selector = +received_sender was set, and the addition of the
4159 sender made the log line's construction buffer exactly full, or one byte
4160 less than full, an overflow happened when the terminating "\n" was
4163 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4164 when the result of a list match is failure because a DNS lookup failed.
4166 PH/40 RM_COMMAND is now used in the building process.
4168 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4169 the "build-* directories that it finds.
4171 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4172 address in a domain literal was a prefix of an interface address.
4174 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4175 when verifying a sender address, unless rewrite_headers is false.
4177 PH/44 Wrote a long comment about why errors_to addresses are verified as
4178 recipients, not senders.
4180 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4181 the ratelimit ACL was added.
4183 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4185 PH/46 Added extra information about PostgreSQL errors to the error string.
4187 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4188 avoiding the need to install special zones in a real server. This is
4189 backwards compatible; if it can't find the fake resolver, it drops back.
4190 Thus, both old and new test suites can be run.
4192 TF/02 Added util/ratelimit.pl
4194 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4195 clock is set back in time.
4197 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4198 Candler <B.Candler@pobox.com>.
4200 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4201 OK for addresses that are the result of redirections.
4203 PH/48 A number of further additions for the benefit of the new test suite,
4204 including a fake gethostbyname() that interfaces to the fake DNS resolver
4207 TF/06 The fix for widen_domains has also been applied to qualify_single and
4208 search_parents which are the other dnslookup options that can cause
4211 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4214 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4216 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4217 service" if it encountered an MX record with an empty target hostname.
4218 The message is now "an MX or SRV record indicated no SMTP service".
4220 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4221 if the DNS of the sending site is misconfigured. This is quite a
4222 common situation. This change restores the behaviour of treating a
4223 helo verification defer as a failure.
4225 PH/51 If self=fail was set on a router, the bounce message did not include the
4226 actual error message.
4232 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4234 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4235 command itself ended in error, the underlying message about the transport
4236 filter timeout was being overwritten with the pipe command error. Now the
4237 underlying error message should be appended to the second error message.
4239 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4241 PH/02 Reduce the amount of output that "make" produces by default. Full output
4242 can still be requested.
4244 PH/03 The warning log line about a condition test deferring for a "warn" verb
4245 was being output only once per connection, rather than after each
4246 occurrence (because it was using the same function as for successful
4247 "warn" verbs). This seems wrong, so I have changed it.
4249 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4250 it should not have, which might have caused a crash in the right
4251 circumstances, but probably never did.
4253 PH/04 Installed a modified version of Tony Finch's patch to make submission
4254 mode fix the return path as well as the Sender: header line, and to
4255 add a /name= option so that you can make the user's friendly name appear
4258 TF/03 Added the control = fakedefer ACL modifier.
4260 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4261 Mark Lowes for thorough testing.
4263 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4265 TK/03 Merged latest SRS patch from Miles Wilton.
4267 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4268 with the definition in sysexits.h (which is #included earlier).
4269 Fortunately, Exim does not actually use EX_OK. The code used to try to
4270 preserve the sysexits.h value, by assuming that macro definitions were
4271 scanned for macro replacements. I have been disabused of this notion,
4272 so now the code just undefines EX_OK before #including unistd.h.
4274 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4275 in the smtp transport. When a block could not be written in a single
4276 write() function, the timeout was being re-applied to each part-write.
4277 This seems wrong - if the receiver was accepting one byte at a time it
4278 would take for ever. The timeout is now adjusted when this happens. It
4279 doesn't have to be particularly precise.
4281 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4282 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4284 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4285 without a domain if the check to <postmaster@domain> fails.
4287 SC/01 Eximstats: added -xls and the ability to specify output files
4288 (patch written by Frank Heydlauf).
4290 SC/02 Eximstats: use FileHandles for outputting results.
4292 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4294 SC/04 Eximstats: fixed display of large numbers with -nvr option
4296 SC/05 Eximstats: fixed merging of reports with empty tables.
4298 SC/06 Eximstats: added the -include_original_destination flag
4300 SC/07 Eximstats: removed tabs and trailing whitespace.
4302 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4304 TK/06 MBOX spool code: Add real "From " MBOX separator line
4305 so the .eml file is really in mbox format (even though
4306 most programs do not really care). Patch from Alex Miller.
4308 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4309 The latter is generated from $received_to and is only set if the
4310 message has one envelope recipient. SA can use these headers,
4311 obviously out-of-the-box. Patch from Alex Miller.
4313 PH/08 The ${def test on a variable was returning false if the variable's
4314 value was "0", contrary to what the specification has always said!
4315 The result should be true unless the variable is empty.
4317 PH/09 The syntax error of a character other than { following "${if
4318 def:variable_name" (after optional whitespace) was not being diagnosed.
4319 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4320 accidental colon was present, for example, could give incorrect results.
4322 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4323 result is used (not including appendfile, where other changes are about
4326 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4327 This involved changing a lot of size variables from int to off_t. It
4328 should work with maildirs and everything.
4330 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4331 spamd dying while we are connected to it.
4333 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4336 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4337 function for BDB 4.3.
4339 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4341 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4342 the sources for PCRE have been re-arranged and more files are now
4345 PH/15 The code I had for printing potentially long long variables in PH/11
4346 above was not the best (it lost precision). The length of off_t variables
4347 is now inspected at build time, and an appropriate printing format (%ld
4348 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4349 to be "long long int" or "long int". This is needed for the internal
4350 formatting function string_vformat().
4352 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4353 the configuration file to be ":syslog", then the script "guesses" where
4354 the logs files are, rather than using the compiled in default. In our
4355 case the guess is not the same as the compiled default, so the script
4356 suddenly stopped working when I started to use syslog. The patch checks
4357 to see if log_file_path is "". If so, it attempts to read it from exim
4358 with no configuration file to get the compiled in version, before it
4359 falls back to the previous guessing code."
4361 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4362 implementing BATV in an Exim configuration. See NewStuff for the gory
4365 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4366 Makefile that are specific to HP-UX.
4368 PH/18 If the "use_postmaster" option was set for a recipient callout together
4369 with the "random" option, the postmaster address was used as the MAIL
4370 FROM address for the random test, but not for the subsequent recipient
4371 test. It is now used for both.
4373 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4374 patch removes a few documentation additions to RFC 3028, because the
4375 latest draft now contains them. It adds the new en;ascii-case comparator
4376 and a new error check for 8bit text in MIME parts. Comparator and
4377 require names are now matched exactly. I enabled the subaddress
4378 extension, but it is not well tested yet (read: it works for me)."
4380 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4381 rework some of the code of TK/09 above to avoid the hardwired use of
4382 "%lld" and "long long". Replaced the call to snprintf() with a call to
4385 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4386 records point to non-existent hosts", "retry timeout exceeded", and
4387 "retry time not reached for any host after a long failure period".
4389 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4390 experimental DomainKeys support:
4392 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4393 (2) On an error such as an illegally used "control", the wrong name for
4394 the control was given.
4396 These problems did NOT occur unless DomainKeys support was compiled.
4398 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4400 PH/24 Added ${if match_ip condition.
4402 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4403 databases so that it will be absolutely obvious if a crash occurs in the
4404 DB library. This is a regular occurrence (often caused by mis-matched
4407 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4408 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4409 picked up on a user's system that detects such things. There doesn't seem
4410 to be a gcc warning option for this - only an attribute that has to be
4411 put on the function's prototype. It seems that in Fedora Core 4 they have
4412 set this on a number of new functions. No doubt there will be more in due
4415 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4416 specify a transport. However, if an address that was verified by such a
4417 router was the subject of a callout, Exim crashed because it tried to
4418 read the rcpt_include_affixes from the non-existent transport. Now it
4419 just assumes that the setting of that option is false. This bug was
4420 introduced by 4.51/PH/31.
4422 PH/28 Changed -d+all to exclude +memory, because that information is very
4423 rarely of interest, but it makes the output a lot bigger. People tend to
4424 do -d+all out of habit.
4426 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4427 code in os-type was giving problems when libc.so lives in lib64, like on
4430 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4431 aren't the modern standard, and it seems that some systems' include files
4432 don't always have them. Exim was already checking for some of the newer
4433 ones like T_AAAA, and defining it itself. I've added checks for all the
4434 record types that Exim uses.
4436 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4437 not automatically generating a new one, as it is supposed to. This
4438 prevented TLS from working. If the file did exist, but contained invalid
4439 data, a new version was generated, as expected. It was only the case of a
4440 non-existent file that was broken.
4442 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4443 with a change in libdomainkeys > 0.64.
4445 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4446 from DNS. If the selector record carries the flag, it now has
4447 precedence over the domain-wide flag.
4449 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4451 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4452 the use of a port name that isn't defined in /etc/services) occurred, the
4453 message was deferred as in a normal delivery, and thus remained on the
4454 spool, instead of being failed because of the mua_wrapper setting. This
4455 is now fixed, and I tidied up some of the mua_wrapper messages at the
4458 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4459 the messages in a hash of arrays rather than using individual hashes.
4460 This is a bit cleaner and results in dramatic memory savings, albeit
4461 at a slight CPU cost.
4463 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4464 as requested by Marc Sherman.
4466 SC/10 Eximstats: added histograms for user specified patterns as requested
4469 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4471 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4472 fopen() in the content-scanning modules that did not already have it.
4478 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4479 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4481 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4483 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4485 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4486 to test Sieve filters that use "vacation".
4488 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4489 that changes the way the GnuTLS parameters are stored in the cache file.
4490 The new format can be generated externally. For backward compatibility,
4491 if the data in the cache doesn't make sense, Exim assumes it has read an
4492 old-format file, and it generates new data and writes a new file. This
4493 means that you can't go back to an older release without removing the
4496 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4497 work if there are any delivery delays because "one_time" forces the
4498 parent to be marked "delivered", so its unseen clone is never tried
4499 again. For this reason, Exim now forbids the simultaneous setting of
4502 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4503 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4504 entry if you want to know the details. The fix, however, neglected to
4505 consider the case when local delivery batching is involved. The test for
4506 "previously delivered" was not happening when checking to see if an
4507 address could be batched with a previous (undelivered) one; under
4508 certain circumstances this could lead to multiple deliveries to the same
4511 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4512 in its include files, and this causes problems building Exim.
4514 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4515 header_syntax) but Exim was just ignoring anything given after a slash.
4516 In particular, this caused confusion with an attempt to use "verify =
4517 reverse_host_lookup/defer_ok". An error is now given when options are
4518 supplied for verify items that do not have them. (Maybe reverse_host_
4519 lookup should have a defer_ok option, but that's a different point.)
4521 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4522 defined by RFC 821) to 2048, because there were problems with some AUTH
4523 commands, and RFC 1869 says the size should be increased for extended
4524 SMTP commands that take arguments.
4526 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4529 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4530 "unknown" error; now it says that the functionality isn't in the binary.
4532 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4533 an address' error message when a string expansion fails (syntax or
4534 whatever). Otherwise the password may appear in the log. Following change
4535 PH/42 below, there is no longer a chance of it appearing in a bounce
4538 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4540 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4541 of its addresses was ever tried. (Bugzilla bug #2.)
4543 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4544 the result incorrectly in the debug output. (It correctly added a newline
4545 to what was transported.)
4547 TF/01 Added $received_time.
4549 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4550 commented out examples of how to interface to a virus scanner and to
4551 SpamAssassin. Also added commented examples of av_scanner and
4552 spamd_address settings.
4554 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4555 and controls are allowed in which ACLs. There were a couple of minor
4556 errors. Some of the entries in the conditions table (which is a table of
4557 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4558 negation of where the condition IS allowed.
4560 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4562 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4563 header file does not have a version number, so I've had to invent a new
4564 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4565 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4566 radiusclient), but it was contributed by a Radius user.
4568 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4569 files or directories, for OpenSSL.
4571 PH/19 When an Exim process that is running as root has to create an Exim log
4572 file, it does so in a subprocess that runs as exim:exim so as to get the
4573 ownership right at creation (otherwise, other Exim processes might see
4574 the file with the wrong ownership). There was no test for failure of this
4575 fork() call, which would lead to the process getting stuck as it waited
4576 for a non-existent subprocess. Forks do occasionally fail when resources
4577 run out. I reviewed all the other calls to fork(); they all seem to check
4580 PH/20 When checking for unexpected SMTP input at connect time (before writing
4581 the banner), Exim was not dealing correctly with a non-positive return
4582 from the read() function. If the client had disconnected by this time,
4583 the result was a log entry for a synchronization error with an empty
4584 string after "input=" when read() returned zero. If read() returned -1
4585 (an event I could not check), uninitialized data bytes were printed.
4586 There were reports of junk text (parts of files, etc) appearing after
4589 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4591 PH/22 Added support for macro redefinition, and (re)definition in between
4592 driver and ACL definitions.
4594 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4595 forgetting to use the resulting value; it was using the unexpanded value.
4597 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4598 hadn't been configured. The fix is from Juergen Kreileder, who
4599 understands it better than I do:
4601 "Here's what I see happening with three configured cyrus_sasl
4602 authenticators configured (plain, login, cram-md5):
4604 On startup auth_cyrus_sasl_init() gets called for each of these.
4605 This means three calls to sasl_listmech() without a specified mech_list.
4606 => SASL tests which mechs of all available mechs actually work
4607 => three warnings about OTP not working
4608 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4610 With the patch, sasl_listmech() also gets called three times. But now
4611 SASL's mech_list option is set to the server_mech specified in the the
4612 authenticator. Or in other words, the answer from sasl_listmech()
4613 gets limited to just the mech you're testing for (which is different
4615 => the return list contains just 'plain' or 'login', 'cram-md5' or
4616 nothing depending on the value of ob->server_mech.
4618 I've just tested the patch: Authentication still works fine,
4619 unavailable mechs specified in the exim configuration are still
4620 caught, and the auth.log warnings about OTP are gone."
4622 PH/25 When debugging is enabled, the contents of the command line are added
4623 to the debugging output, even when log_selector=+arguments is not
4626 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4627 answer is "GNU", and only if the return is "GNU/something" is the answer
4630 PH/27 $acl_verify_message is now set immediately after the failure of a
4631 verification in an ACL, and so is available in subsequent modifiers. In
4632 particular, the message can be preserved by coding like this:
4634 warn !verify = sender
4635 set acl_m0 = $acl_verify_message
4637 Previously, $acl_verify_message was set only while expanding "message"
4638 and "log_message" when a very denied access.
4640 PH/28 Modified OS/os.c-Linux with
4642 -#ifndef OS_LOAD_AVERAGE
4643 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4645 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4646 nomenclature these days.)
4648 PH/29 Installed patch from the Sieve maintainer that adds the options
4649 sieve_useraddress and sieve_subaddress to the redirect router.
4651 PH/30 In these circumstances:
4652 . Two addresses routed to the same list of hosts;
4653 . First host does not offer TLS;
4654 . First host accepts first address;
4655 . First host gives temporary error to second address;
4656 . Second host offers TLS and a TLS session is established;
4657 . Second host accepts second address.
4658 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4659 and peerdn, if requested) that were in fact used only for the second
4662 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4663 attention to any local part prefix or suffix that was matched by the
4664 router that accepted the address. It now behaves in the same way as it
4665 does for delivery: the affixes are removed from the local part unless
4666 rcpt_include_affixes is set on the transport.
4668 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4669 timeout during the DATA phase of an incoming message.
4671 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4672 applied a patch sanctioned by the Sieve maintainer.
4674 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4675 the uid or gid is negative. A case of a negative gid caused this to be
4676 noticed. The fix allows for either to be negative.
4678 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4679 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4682 PH/36 The change PH/12 above was broken. Fixed it.
4684 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4685 the grounds that routing the same address twice would always produce the
4686 same answer. This might have been true once, but it is certainly no
4687 longer true now. Routing a child address may depend on the previous
4688 routing that produced that child. Some complicated redirection strategies
4689 went wrong when messages had multiple recipients, and made Exim's
4690 behaviour dependent on the order in which the addresses were given.
4692 I have moved the duplicate checking until after the routing is complete.
4693 Exim scans the addresses that are assigned to local and remote
4694 transports, and removes any duplicates. This means that more work will be
4695 done, as duplicates will always all be routed, but duplicates are
4696 presumably rare, so I don't expect this is of any significance.
4698 For deliveries to pipes, files, and autoreplies, the duplicate checking
4699 still happens during the routing process, since they are not going to be
4702 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4703 It corrects a timeout issue with spamd. This is Ian's comment: "The
4704 background is that sometimes spamd either never reads data from a
4705 connection it has accepted, or it never writes response data. The exiscan
4706 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4707 blindly assumes that writes won't block so it may never time out."
4709 PH/39 Allow G after quota size as well as K and M.
4711 PH/40 The value set for $authenticated_id in an authenticator may not contain
4712 binary zeroes or newlines because the value is written to log lines and
4713 to spool files. There was no check on this. Now the value is run through
4714 the string_printing() function so that such characters are converted to
4715 printable escape sequences.
4717 PH/41 $message_linecount is a new variable that contains the total number of
4718 lines in the message. Compare $body_linecount, which is the count for the
4721 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4722 bounce and delay warning messages, except in certain special cases, which
4725 (a) An SMTP error message from a remote host;
4726 (b) A message specified in a :fail: redirection;
4727 (c) A message specified in a "fail" command in a system filter;
4728 (d) A message specified in a FAIL return from the queryprogram router;
4729 (e) A message specified by the cannot_route_message router option.
4731 In these cases only, Exim does include the error details in bounce and
4732 warning messages. There are also a few cases where bland messages such
4733 as "unrouteable address" or "local delivery error" are given.
4735 PH/43 $value is now also set for the "else" part of a ${run expansion.
4737 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4738 being worked on, but at least Exim now implements the latest version to
4741 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4742 process to complete was treated as a delivery failure, a timeout while
4743 writing the message to the pipe was logged, but erroneously treated as a
4744 successful delivery. Such timeouts include transport filter timeouts. For
4745 consistency with the overall process timeout, these timeouts are now
4746 treated as errors, giving rise to delivery failures by default. However,
4747 there is now a new Boolean option for the pipe transport called
4748 timeout_defer, which, if set TRUE, converts the failures into defers for
4749 both kinds of timeout. A transport filter timeout is now identified in
4752 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4753 systems where "make" and "gmake" are different, calling "gmake" at top
4754 level broke things. I've arranged for the value of $(MAKE) to be passed
4755 from the Makefile to this script so that it can call the same version of
4759 A note about Exim versions 4.44 and 4.50
4760 ----------------------------------------
4762 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4763 changes of various kinds. As a consequence, a big documentation update was
4764 needed. This delayed the release for rather longer than seemed good, especially
4765 in the light of a couple of (minor) security issues. Therefore, the changes
4766 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4767 release. So 4.44 and 4.50 are in effect two different branches that both start
4770 I have left the 4.50 change log unchanged; it contains all the changes since
4771 4.43. The change log for 4.44 is below; many of its items are identical to
4772 those for 4.50. This seems to be the most sensible way to preserve the
4773 historical information.
4779 1. Minor wording change to the doc/README.SIEVE file.
4781 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4782 computation of the current number of files was incorrect.
4784 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4785 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4788 4. Give more explanation in the error message when the command for a transport
4789 filter fails to execute.
4791 5. There are several places where Exim runs a non-Exim command in a
4792 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4793 was being done only for the command run by the queryprogram router. It is
4794 now done for all such subprocesses. The other cases are: ${run, transport
4795 filters, and the commands run by the lmtp and pipe transports.
4797 6. Added CONFIGURE_GROUP build-time option.
4799 7. Some older OS have a limit of 256 on the maximum number of file
4800 descriptors. Exim was using setrlimit() to set 1000 as a large value
4801 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4802 systems. I've change it so that if it can't get 1000, it tries for 256.
4804 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4805 was an oversight, and furthermore, ever since the addition of extra
4806 controls (e.g. 4.43/32), the checks on when to allow different forms of
4807 "control" were broken. There should now be diagnostics for all cases when a
4808 control that does not make sense is encountered.
4810 9. Added the /retain_sender option to "control=submission".
4812 10. $recipients is now available in the predata ACL (oversight).
4814 11. Tidy the search cache before the fork to do a delivery from a message
4815 received from the command line. Otherwise the child will trigger a lookup
4816 failure and thereby defer the delivery if it tries to use (for example) a
4817 cached ldap connection that the parent has called unbind on.
4819 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4820 of $address_data from the recipient verification was clobbered by the
4821 sender verification.
4823 13. The value of address_data from a sender verification is now available in
4824 $sender_address_data in subsequent conditions in the ACL statement.
4826 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4828 15. Added a new option "connect=<time>" to callout options, to set a different
4831 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4832 was its contents. (It was OK if the option was not defined at all.)
4834 17. A "Completed" log line is now written for messages that are removed from
4835 the spool by the -Mrm option.
4837 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4838 information about exactly what failed.
4840 19. Added -dd to debug only the daemon process.
4842 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4843 handles timeouts, both on the server side and network timeouts. Renamed the
4844 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4846 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4847 It is now set to "smtps".
4849 22. $host_address is now set to the target address during the checking of
4850 ignore_target_hosts.
4852 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4853 being passed; this would have caused $sender_host_name to have been used if
4854 matching the list had actually called for a host name (not very likely,
4855 since this list is usually IP addresses). A host name is now passed as
4858 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4859 code that specifies a non-restarting handler (typically sigaction() in
4860 modern systems) in an attempt to fix a rare and obscure crash bug.
4862 25. Narrowed the window for a race in the daemon that could cause it to ignore
4863 SIGCHLD signals. This is not a major problem, because they are used only to
4864 wake it up if nothing else does.
4866 26. A malformed maildirsize file could cause Exim to calculate negative values
4867 for the mailbox size or file count. Odd effects could occur as a result.
4868 The maildirsize information is now recalculated if the size or filecount
4871 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4872 support for a long time. Removed HAVE_SYS_VFS_H.
4874 28. Installed the latest version of exipick from John Jetmore.
4876 29. In an address list, if the pattern was not a regular expression, an empty
4877 subject address (from a bounce message) matched only if the pattern was an
4878 empty string. Non-empty patterns were not even tested. This was the wrong
4879 because it is perfectly reasonable to use an empty address as part of a
4880 database query. An empty address is now tested by patterns that are
4881 lookups. However, all the other forms of pattern expect the subject to
4882 contain a local part and a domain, and therefore, for them, an empty
4883 address still always fails if the pattern is not itself empty.
4885 30. Exim went into a mad DNS loop when attempting to do a callout where the
4886 host was specified on an smtp transport, and looking it up yielded more
4887 than one IP address.
4889 31. Re-factored the code for checking spool and log partition space into a
4890 function that finds that data and another that does the check. The former
4891 is then used to implement four new variables: $spool_space, $log_space,
4892 $spool_inodes, and $log_inodes.
4894 32. The RFC2047 encoding function was originally intended for short strings
4895 such as real names; it was not keeping to the 75-character limit for
4896 encoded words that the RFC imposes. It now respects the limit, and
4897 generates multiple encoded words if necessary. To be on the safe side, I
4898 have increased the buffer size for the ${rfc2047: expansion operator from
4901 33. It is now permitted to omit both strings after an "if" condition; if the
4902 condition is true, the result is "true". As before, when the second string
4903 is omitted, a false condition yields an empty string. This makes it less
4904 cumbersome to write custom ACL and router conditions.
4906 34. Failure to deliver a bounce message always caused it to be frozen, even if
4907 there was an errors_to setting on the router. The errors_to setting is now
4910 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4911 canonical form (fully expanded) before being placed in
4912 $sender_host_address.
4914 36. The table in the code that translates DNS record types into text (T_A to
4915 "A" for instance) was missing entries for NS and CNAME. It is just possible
4916 that this could have caused confusion if both these types were looked up
4917 for the same domain, because the text type is used as part of Exim's
4918 per-process caching. But the chance of anyone hitting this buglet seems
4921 37. The dnsdb lookup has been extended in a number of ways.
4923 (1) There is a new type, "zns", which walks up the domain tree until it
4924 finds some nameserver records. It should be used with care.
4926 (2) There is a new type, "mxh", which is like "mx" except that it returns
4927 just the host names, not the priorities.
4929 (3) It is now possible to give a list of domains (or IP addresses) to be
4930 looked up. The behaviour when one of the lookups defers can be
4931 controlled by a keyword.
4933 (4) It is now possible to specify the separator character for use when
4934 multiple records are returned.
4936 38. The dnslists ACL condition has been extended: it is now possible to supply
4937 a list of IP addresses and/or domains to be looked up in a particular DNS
4940 39. Added log_selector=+queue_time_overall.
4942 40. When running the queue in the test harness, wait just a tad after forking a
4943 delivery process, to get repeatability of debugging output.
4945 41. Include certificate and key file names in error message when GnuTLS fails
4946 to set them up, because the GnuTLS error message doesn't include the name
4947 of the failing file when there is a problem reading it.
4949 42. Allow both -bf and -bF in the same test run.
4951 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4953 44. The "Exiscan patch" is now merged into the mainline Exim source.
4955 45. Sometimes the final signoff response after QUIT could fail to get
4956 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4957 < 0 before doing a fflush(). This bug looks as though it goes back to the
4958 introduction of TLS in release 3.20, but "sometimes" must have been rare
4959 because the tests only now provoked it.
4961 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4962 (this can affect the format of dates).
4964 47. exim_tidydb, when checking for the continued existence of a message for
4965 which it has found a message-specific retry record, was not finding
4966 messages that were in split spool directories. Consequently, it was
4967 deleting retry records that should have stayed in existence.
4969 48. Steve fixed some bugs in eximstats.
4971 49. The SPA authentication driver was not abandoning authentication and moving
4972 on to the next authenticator when an expansion was forced to fail,
4973 contradicting the general specification for all authenticators. Instead it
4974 was generating a temporary error. It now behaves as specified.
4976 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4977 (the order specifies the preference for clients). The order is now AES256,
4978 AES128, 3DES, ARCFOUR128.
4980 51. Small patch to Sieve code - explicitly set From: when generating an
4983 52. Exim crashed if a remote delivery caused a very long error message to be
4984 recorded - for instance if somebody sent an entire SpamAssassin report back
4985 as a large number of 550 error lines. This bug was coincidentally fixed by
4986 increasing the size of one of Exim's internal buffers (big_buffer) that
4987 happened as part of the Exiscan merge. However, to be on the safe side, I
4988 have made the code more robust (and fixed the comments that describe what
4991 53. Now that there can be additional text after "Completed" in log lines (if
4992 the queue_time_overall log selector is set), a one-byte patch to exigrep
4993 was needed to allow it to recognize "Completed" as not the last thing in
4996 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4997 patch that reportedly fixes this has been added. I am not expert enough to
4998 create a test for it. This is what the patch creator wrote:
5000 "I found a little strange behaviour of ldap code when working with
5001 Windows 2003 AD Domain, where users was placed in more than one
5002 Organization Units. When I tried to give exim partial DN, the exit code
5003 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5004 But simultaneously result of request was absolutely normal ldap result,
5005 so I produce this patch..."
5007 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5008 REFERENCE, so I have modified the code to exclude the patch when that macro
5011 55. Some experimental protocols are using DNS PTR records for new purposes. The
5012 keys for these records are domain names, not reversed IP addresses. The
5013 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5014 leaves it alone. Component reversal etc. now happens only for IP addresses.
5017 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5019 57. Double the size of the debug message buffer (to 2048) so that more of very
5020 long debug lines gets shown.
5022 58. The exicyclog utility now does better if the number of log files to keep
5023 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5025 59. Two changes related to the smtp_active_hostname option:
5027 (1) $smtp_active_hostname is now available as a variable.
5028 (2) The default for smtp_banner uses $smtp_active_hostname instead
5029 of $primary_hostname.
5031 60. The host_aton() function is supposed to be passed a string that is known
5032 to be a valid IP address. However, in the case of IPv6 addresses, it was
5033 not checking this. This is a hostage to fortune. Exim now panics and dies
5034 if the condition is not met. A case was found where this could be provoked
5035 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5036 components; fortuitously, this particular loophole had already been fixed
5037 by change 4.50/55 above.
5039 If there are any other similar loopholes, the new check in host_aton()
5040 itself should stop them being exploited. The report I received stated that
5041 data on the command line could provoke the exploit when Exim was running as
5042 exim, but did not say which command line option was involved. All I could
5043 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5044 running as the user.
5047 61. There was a buffer overflow vulnerability in the SPA authentication code
5048 (which came originally from the Samba project). I have added a test to the
5049 spa_base64_to_bits() function which I hope fixes it.
5052 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5053 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5055 63. The daemon start-up calls getloadavg() while still root for those OS that
5056 need the first call to be done as root, but it missed one case: when
5057 deliver_queue_load_max is set with deliver_drop_privilege. This is
5058 necessary for the benefit of the queue runner, because there is no re-exec
5059 when deliver_drop_privilege is set.
5061 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5062 This has been fixed.
5064 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5065 was in use, was not putting the data itself into the right store pool;
5066 consequently, it could be overwritten for a subsequent message in the same
5067 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5070 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5072 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5073 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5074 the function were treating the return as a boolean value, which happened to
5075 work because 0=false and not-0=true, but is not correct code.
5077 68. The host_aton() function was not handling scoped IPv6 addresses (those
5078 with, for example, "%eth0" on the end) correctly.
5080 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5081 negated items (that is, ~something) in unsigned ints. Some compilers
5082 apparently mutter when there is no cast.
5084 70. If an address verification called from an ACL failed, and did not produce a
5085 user-specific message (i.e. there was only a "system" message), nothing was
5086 put in $acl_verify_message. In this situation, it now puts the system
5089 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5090 session; change 4.31/43 added the unwanted input to the log line - except
5091 that it did not do this in the start of session case. It now does.
5093 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5094 This is wrong and can cause the other end to generate a synchronization
5095 error if it is another Exim or anything else that does the synchronization
5096 check. A QUIT command is no longer sent after a timeout.
5098 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5099 during host lookups.
5101 74. The defer_ok option of callout verification was not working if it was used
5102 when verifying addresses in header lines, that is, for this case:
5104 verify = header_sender/callout=defer_ok
5106 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5107 those file descriptors could be used for SMTP connections. If anything
5108 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5109 could be sent to the SMTP client, causing chaos. The daemon now opens
5110 stdin, stdout, and stderr to /dev/null when it puts itself into the
5113 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5114 log by default. The user can override this with suitable Perl magic.
5116 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5117 the log message when discard triggers, was not working for the DATA ACL or
5118 for the non-SMTP ACL.
5120 78. Error message wording change in sieve.c.
5122 79. If smtp_accept_max_per_host was set, the number of connections could be
5123 restricted to fewer than expected, because the daemon was trying to set up
5124 a new connection before checking whether the processes handling previous
5125 connections had finished. The check for completed processes is now done
5126 earlier. On busy systems, this bug wouldn't be noticed because something
5127 else would have woken the daemon, and it would have reaped the completed
5130 80. If a message was submitted locally by a user whose login name contained one
5131 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5132 It caused a spool format error. I have fixed the spool reading code. A
5133 related problem was that the "from" clause in the Received: line became
5134 illegal because of the space(s). It is now covered by ${quote_local_part.
5136 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5139 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5141 83. Patch from Sieve maintainer to fix unterminated string problem in
5142 "vacation" handling.
5144 84. Some minor changes to the Linux configuration files to help with other
5145 OS variants using glibc.
5147 85. One more patch for Sieve to update vacation handling to latest spec.
5150 ----------------------------------------------------
5151 See the note above about the 4.44 and 4.50 releases.
5152 ----------------------------------------------------
5158 1. Change 4.43/35 introduced a bug that caused file counts to be
5159 incorrectly computed when quota_filecount was set in an appendfile
5162 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5163 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5166 3. Give more explanation in the error message when the command for a transport
5167 filter fails to execute.
5169 4. There are several places where Exim runs a non-Exim command in a
5170 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5171 was being done only for the command run by the queryprogram router. It is
5172 now done for all such subprocesses. The other cases are: ${run, transport
5173 filters, and the commands run by the lmtp and pipe transports.
5175 5. Some older OS have a limit of 256 on the maximum number of file
5176 descriptors. Exim was using setrlimit() to set 1000 as a large value
5177 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5178 systems. I've change it so that if it can't get 1000, it tries for 256.
5180 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5181 was an oversight, and furthermore, ever since the addition of extra
5182 controls (e.g. 4.43/32), the checks on when to allow different forms of
5183 "control" were broken. There should now be diagnostics for all cases when a
5184 control that does not make sense is encountered.
5186 7. $recipients is now available in the predata ACL (oversight).
5188 8. Tidy the search cache before the fork to do a delivery from a message
5189 received from the command line. Otherwise the child will trigger a lookup
5190 failure and thereby defer the delivery if it tries to use (for example) a
5191 cached ldap connection that the parent has called unbind on.
5193 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5194 of $address_data from the recipient verification was clobbered by the
5195 sender verification.
5197 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5198 was its contents. (It was OK if the option was not defined at all.)
5200 11. A "Completed" log line is now written for messages that are removed from
5201 the spool by the -Mrm option.
5203 12. $host_address is now set to the target address during the checking of
5204 ignore_target_hosts.
5206 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5207 being passed; this would have caused $sender_host_name to have been used if
5208 matching the list had actually called for a host name (not very likely,
5209 since this list is usually IP addresses). A host name is now passed as
5212 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5213 code that specifies a non-restarting handler (typically sigaction() in
5214 modern systems) in an attempt to fix a rare and obscure crash bug.
5216 15. Narrowed the window for a race in the daemon that could cause it to ignore
5217 SIGCHLD signals. This is not a major problem, because they are used only to
5218 wake it up if nothing else does.
5220 16. A malformed maildirsize file could cause Exim to calculate negative values
5221 for the mailbox size or file count. Odd effects could occur as a result.
5222 The maildirsize information is now recalculated if the size or filecount
5225 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5226 support for a long time. Removed HAVE_SYS_VFS_H.
5228 18. Updated exipick to current release from John Jetmore.
5230 19. Allow an empty sender to be matched against a lookup in an address list.
5231 Previously the only cases considered were a regular expression, or an
5234 20. Exim went into a mad DNS lookup loop when doing a callout where the
5235 host was specified on the transport, if the DNS lookup yielded more than
5238 21. The RFC2047 encoding function was originally intended for short strings
5239 such as real names; it was not keeping to the 75-character limit for
5240 encoded words that the RFC imposes. It now respects the limit, and
5241 generates multiple encoded words if necessary. To be on the safe side, I
5242 have increased the buffer size for the ${rfc2047: expansion operator from
5245 22. Failure to deliver a bounce message always caused it to be frozen, even if
5246 there was an errors_to setting on the router. The errors_to setting is now
5249 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5250 canonical form (fully expanded) before being placed in
5251 $sender_host_address.
5253 24. Updated eximstats to version 1.33
5255 25. Include certificate and key file names in error message when GnuTLS fails
5256 to set them up, because the GnuTLS error message doesn't include the name
5257 of the failing file when there is a problem reading it.
5259 26. Expand error message when OpenSSL has problems setting up cert/key files.
5262 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5263 (this can affect the format of dates).
5265 28. exim_tidydb, when checking for the continued existence of a message for
5266 which it has found a message-specific retry record, was not finding
5267 messages that were in split spool directories. Consequently, it was
5268 deleting retry records that should have stayed in existence.
5270 29. eximstats updated to version 1.35
5271 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5272 1.35 - bugfix such that pie charts by volume are generated correctly
5274 30. The SPA authentication driver was not abandoning authentication and moving
5275 on to the next authenticator when an expansion was forced to fail,
5276 contradicting the general specification for all authenticators. Instead it
5277 was generating a temporary error. It now behaves as specified.
5279 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5280 (the order specifies the preference for clients). The order is now AES256,
5281 AES128, 3DES, ARCFOUR128.
5283 31. Small patch to Sieve code - explicitly set From: when generating an
5286 32. Exim crashed if a remote delivery caused a very long error message to be
5287 recorded - for instance if somebody sent an entire SpamAssassin report back
5288 as a large number of 550 error lines. This bug was coincidentally fixed by
5289 increasing the size of one of Exim's internal buffers (big_buffer) that
5290 happened as part of the Exiscan merge. However, to be on the safe side, I
5291 have made the code more robust (and fixed the comments that describe what
5294 33. Some experimental protocols are using DNS PTR records for new purposes. The
5295 keys for these records are domain names, not reversed IP addresses. The
5296 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5297 leaves it alone. Component reversal etc. now happens only for IP addresses.
5300 34. The host_aton() function is supposed to be passed a string that is known
5301 to be a valid IP address. However, in the case of IPv6 addresses, it was
5302 not checking this. This is a hostage to fortune. Exim now panics and dies
5303 if the condition is not met. A case was found where this could be provoked
5304 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5305 components; fortuitously, this particular loophole had already been fixed
5306 by change 4.50/55 or 4.44/33 above.
5308 If there are any other similar loopholes, the new check in host_aton()
5309 itself should stop them being exploited. The report I received stated that
5310 data on the command line could provoke the exploit when Exim was running as
5311 exim, but did not say which command line option was involved. All I could
5312 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5313 running as the user.
5316 35. There was a buffer overflow vulnerability in the SPA authentication code
5317 (which came originally from the Samba project). I have added a test to the
5318 spa_base64_to_bits() function which I hope fixes it.
5321 36. The daemon start-up calls getloadavg() while still root for those OS that
5322 need the first call to be done as root, but it missed one case: when
5323 deliver_queue_load_max is set with deliver_drop_privilege. This is
5324 necessary for the benefit of the queue runner, because there is no re-exec
5325 when deliver_drop_privilege is set.
5327 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5328 was in use, was not putting the data itself into the right store pool;
5329 consequently, it could be overwritten for a subsequent message in the same
5330 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5333 38. Sometimes the final signoff response after QUIT could fail to get
5334 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5335 < 0 before doing a fflush(). This bug looks as though it goes back to the
5336 introduction of TLS in release 3.20, but "sometimes" must have been rare
5337 because the tests only now provoked it.
5343 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5344 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5345 Now it returns an integer. A number of calls were still expecting a T/F
5346 return. Fortuitously, in all cases, the tests worked in OK situations,
5347 which is the norm. However, things would have gone wrong on any write
5348 failures on the smtp file descriptor. This function is used when sending
5349 messages over SMTP and also when doing verify callouts.
5351 2. When Exim is called to do synchronous delivery of a locally submitted
5352 message (the -odf or -odi options), it no longer closes stderr before doing
5355 3. Implemented the mua_wrapper option.
5357 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5359 5. Implemented the functions header_remove(), header_testname(),
5360 header_add_at_position(), and receive_remove_recipient(), and exported them
5363 6. If an ACL "warn" statement specified the addition of headers, Exim already
5364 inserted X-ACL-Warn: at the start if there was no header name. However, it
5365 was not making this test for the second and subsequent header lines if
5366 there were newlines in the string. This meant that an invalid header could
5367 be inserted if Exim was badly configured.
5369 7. Allow an ACL "warn" statement to add header lines at the start or after all
5370 the Received: headers, as well as at the end.
5372 8. Added the rcpt_4xx retry error code.
5374 9. Added postmaster_mailfrom=xxx to callout verification option.
5376 10. Added mailfrom=xxxx to the callout verification option, for verify=
5379 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5380 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5382 12. Inserted some casts to stop certain compilers warning when using pointer
5383 differences as field lengths or precisions in printf-type calls (mostly
5384 affecting debugging statements).
5386 13. Added optional readline() support for -be (dynamically loaded).
5388 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5389 same clock tick as a message's arrival, so that its received time was the
5390 same as the "first fail" time on the retry record, and that message
5391 remained on the queue past the ultimate address timeout, every queue runner
5392 would try a delivery (because it was past the ultimate address timeout) but
5393 after another failure, the ultimate address timeout, which should have then
5394 bounced the address, did not kick in. This was a "< instead of <=" error;
5395 in most cases the first failure would have been in the next clock tick
5396 after the received time, and all would be well.
5398 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5399 being recognized when the domain list was tested by the match_domain
5400 condition in an expansion string.
5402 16. Added the ${str2b64: operator.
5404 17. Exim was always calling setrlimit() to set a large limit for the number of
5405 processes, without checking whether the existing limit was already
5406 adequate. (It did check for the limit on file descriptors.) Furthermore,
5407 errors from getrlimit() and setrlimit() were being ignored. Now they are
5408 logged to the main and panic logs, but Exim does carry on, to try to do its
5409 job under whatever limits there are.
5411 18. Imported PCRE 5.0.
5413 19. Trivial typo in log message " temporarily refused connection" (the leading
5416 20. If the log selector return_path_on_delivery was set and an address was
5417 redirected to /dev/null, the delivery process crashed because it assumed
5418 that a return path would always be set for a "successful" delivery. In this
5419 case, the whole delivery is bypassed as an optimization, and therefore no
5422 21. Internal re-arrangement: the function for sending a challenge and reading
5423 a response while authentication was assuming a zero-terminated challenge
5424 string. It's now changed to take a pointer and a length, to allow for
5425 binary data in such strings.
5427 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5429 23. Exim was not respecting finduser_retries when seeking the login of the
5430 uid under which it was called; it was always trying 10 times. (The default
5431 setting of finduser_retries is zero.) Also, it was sleeping after the final
5432 failure, which is pointless.
5434 24. Implemented tls_on_connect_ports.
5436 25. Implemented acl_smtp_predata.
5438 26. If the domain in control=submission is set empty, Exim assumes that the
5439 authenticated id is a complete email address when it generates From: or
5440 Sender: header lines.
5442 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5443 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5444 chown and chgrp in /bin and hostname in /usr/bin.
5446 28. Exim was keeping the "process log" file open after each use, just as it
5447 does for the main log. This opens the possibility of it remaining open for
5448 long periods when the USR1 signal hits a daemon. Occasional processlog
5449 errors were reported, that could have been caused by this. Anyway, it seems
5450 much more sensible not to leave this file open at all, so that is what now
5453 29. The long-running daemon process does not normally write to the log once it
5454 has entered its main loop, and it closes the log before doing so. This is
5455 so that log files can straightforwardly be renamed and moved. However,
5456 there are a couple of unusual error situations where the daemon does write
5457 log entries, and I had neglected to close the log afterwards.
5459 30. The text of an SMTP error response that was received during a remote
5460 delivery was being truncated at 512 bytes. This is too short for some of
5461 the long messages that one sometimes sees. I've increased the limit to
5464 31. It is now possible to make retry rules that apply only when a message has a
5465 specific sender, in particular, an empty sender.
5467 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5468 it possible to be selective about when SMTP synchronization is enforced.
5470 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5472 32. Implemented hosts_connection_nolog.
5474 33. Added an ACL for QUIT.
5476 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5479 35. Added mailbox_size and mailbox_filecount to appendfile.
5481 36. Added control = no_multiline_responses to ACLs.
5483 37. There was a bug in the logic of the code that waits for the clock to tick
5484 in the case where the clock went backwards by a substantial amount such
5485 that the microsecond fraction of "now" was more than the microsecond
5486 fraction of "then" (but the whole seconds number was less).
5488 38. Added support for the libradius Radius client library this is found on
5489 FreeBSD (previously only the radiusclient library was supported).
5495 1. When certain lookups returned multiple values in the form name=value, the
5496 quoting of the values was not always being done properly. Specifically:
5497 (a) If the value started with a double quote, but contained no whitespace,
5499 (b) If the value contained whitespace other than a space character (i.e.
5500 tabs or newlines or carriage returns) it was not quoted.
5501 This fix has been applied to the mysql and pgsql lookups by writing a
5502 separate quoting function and calling it from the lookup code. The fix
5503 should probably also be applied to nisplus, ibase and oracle lookups, but
5504 since I cannot test any of those, I have not disturbed their existing code.
5506 2. A hit in the callout cache for a specific address caused a log line with no
5507 reason for rejecting RCPT. Now it says "Previous (cached) callout
5508 verification failure".
5510 3. There was an off-by-one bug in the queryprogram router. An over-long
5511 return line was truncated at 256 instead of 255 characters, thereby
5512 overflowing its buffer with the terminating zero. As well as fixing this, I
5513 have increased the buffer size to 1024 (and made a note to document this).
5515 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5516 when Exim is waiting for an SMTP response from a remote server, Exim
5517 restarts its select() call on the socket, thereby resetting its timeout.
5518 This is not a problem when such interrupts are rare. Somebody set up a cron
5519 job to run exiwhat every 2 minutes, which is less than the normal select()
5520 timeout (5 or 10 minutes). This meant that the select() timeout never
5521 kicked in because it was always reset. I have fixed this by comparing the
5522 time when an interrupt arrives with the time at the start of the first call
5523 to select(). If more time than the timeout has elapsed, the interrupt is
5524 treated as a timeout.
5526 5. Some internal re-factoring in preparation for the addition of Sieve
5527 extensions (by MH). In particular, the "personal" test is moved to a
5528 separate function, and given an option for scanning Cc: and Bcc: (which is
5529 not set for Exim filters).
5531 6. When Exim created an email address using the login of the caller as the
5532 local part (e.g. when creating a From: or Sender: header line), it was not
5533 quoting the local part when it contained special characters such as @.
5535 7. Installed new OpenBSD configuration files.
5537 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5538 try to make them clearer.
5540 9. Callout options, other than the timeout value, were being ignored when
5541 verifying sender addresses in header lines. For example, when using
5543 verify = header_sender/callout=no_cache
5545 the cache was (incorrectly) being used.
5547 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5548 only the Cygwin environment.
5550 11. When return_path_on_delivery was set as a log selector, if different remote
5551 addresses in the same message used different return paths and parallel
5552 remote delivery occurred, the wrong values would sometimes be logged.
5553 (Whenever a remote delivery process finished, the return path value from
5554 the most recently started remote delivery process was logged.)
5556 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5557 lines when AUTH and/or TLS are in use. This is the "received protocol"
5558 field. Exim used to use "asmtp" for authenticated SMTP, without any
5559 indication (in the protocol name) for TLS use. Now it follows the RFC and
5560 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5561 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5562 names appear in log lines as well as in Received: header lines.
5564 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5565 extensions, and comparison tests, and to fix some bugs.
5567 14. Changes to the "personal" filter test:
5569 (1) The test was buggy in that it was just doing the equivalent of
5570 "contains" tests on header lines. For example, if a user's address was
5571 anne@some.where, the "personal" test would incorrectly be true for
5573 To: susanne@some.where
5575 This test is now done by extracting each address from the header in turn,
5576 and checking the entire address. Other tests that are part of "personal"
5577 are now done using regular expressions (for example, to check local parts
5578 of addresses in From: header lines).
5580 (2) The list of non-personal local parts in From: addresses has been
5581 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5582 taken from the Sieve specification recommendations.
5584 (3) If the message contains any header line starting with "List-" it is
5585 treated as non-personal.
5587 (4) The test for "circular" in the Subject: header line has been removed
5588 because it now seems ill-conceived.
5590 15. Minor typos in src/EDITME comments corrected.
5592 16. Installed latest exipick from John Jetmore.
5594 17. If headers_add on a router specified a text string that was too long for
5595 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5596 of string_sprintf() is now avoided.
5598 18. $message_body_size was not set (it was always zero) when running the DATA
5599 ACL and the local_scan() function.
5601 19. For the "mail" command in an Exim filter, no default was being set for
5602 the once_repeat time, causing a random time value to be used if "once" was
5603 specified. (If the value happened to be <= 0, no repeat happened.) The
5604 default is now 0s, meaning "never repeat". The "vacation" command was OK
5605 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5606 (I found it when inspecting the code).
5608 20. There is now an overall timeout for performing a callout verification. It
5609 defaults to 4 times the callout timeout, which applies to individual SMTP
5610 commands during the callout. The overall timeout applies when there is more
5611 than one host that can be tried. The timeout is checked before trying the
5612 next host. This prevents very long delays if there are a large number of
5613 hosts and all are timing out (e.g. when the network connections are timing
5614 out). The value of the overall timeout can be changed by specifying an
5615 additional sub-option for "callout", called "maxwait". For example:
5617 verify = sender/callout=5s,maxwait=20s
5619 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5620 to the end before writing, but this should make it even safer).
5622 22. Exim was forgetting that it had advertised PIPELINING for the second and
5623 subsequent messages on an SMTP connection. It was also not resetting its
5624 memory on STARTTLS and an internal HELO.
5626 23. When Exim logs an SMTP synchronization error within a session, it now
5627 records whether PIPELINING has been advertised or not.
5629 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5630 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5631 rather than long int.
5633 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5635 26. Added the never_mail option to autoreply.
5641 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5642 crash if the getsockname() call failed; this can happen if a connection is
5643 closed very soon after it is established. The problem was simply in the
5644 order in which certain operations were done, causing Exim to try to write
5645 to the SMTP stream before it had set up the file descriptor. The bug has
5646 been fixed by making things happen in the correct order.
5652 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5653 before the connection was closed, thus losing the rejection response.
5655 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5656 some early Solaris releases, but causes trouble in current releases where
5657 socklen_t is defined.
5659 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5662 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5665 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5666 that releasing the top of it at the end releases what was used for sub-
5667 expansions (unless the block got too big). However, discard this block if
5668 the first thing is a variable or header, so that we can use its block when
5669 it is dynamic (useful for very large $message_headers, for example).
5671 6. Lookups now cache *every* query, not just the most recent. A new, separate
5672 store pool is used for this. It can be recovered when all lookup caches are
5673 flushed. Lookups now release memory at the end of their result strings.
5674 This has involved some general refactoring of the lookup sources.
5676 7. Some code has been added to the store_xxx() functions to reduce the amount
5677 of flapping under certain conditions.
5679 8. log_incoming_interface used to affect only the <= reception log lines. Now
5680 it causes the local interface and port to be added to several more SMTP log
5681 lines, for example "SMTP connection from", and rejection lines.
5683 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5685 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5687 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5688 could be overwritten at the end of the current message (or the start of a
5689 new message if it was set in a HELO ACL). The value is now preserved for
5690 the duration of the SMTP connection.
5692 12. If a transport had a headers_rewrite setting, and a matching header line
5693 contained an unqualified address, that address was qualified, even if it
5694 did not match any rewriting rules. The underlying bug was that the values
5695 of the flags that permit the existence of unqualified sender and recipient
5696 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5697 non-local messages, and by -bnq for local messages) were not being
5698 preserved with the message after it was received.
5700 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5701 "next input=" as part of the text comprising the host identity instead of
5702 the correct text. The code was using the same buffer for two different
5703 strings. However, depending on which order the printing function evaluated
5704 its arguments, the bug did not always show up. Under Linux, for example, my
5705 test suite worked just fine.
5707 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5708 doesn't work with some older versions of Perl. It has been changed to "my",
5709 which in any case is probably the better facility to use.
5711 15. A really picky compiler found some instances of statements for creating
5712 error messages that either had too many or two few arguments for the format
5715 16. The size of the buffer for calls to the DNS resolver has been increased
5716 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5717 for addresses that have a lot of PTR records. This alleviates a problem; it
5718 does not fully solve it.
5720 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5721 buffer now truncates the list and logs the incident, which is the same
5722 action as happens when Exim is looking up a host name and its aliases.
5723 Previously in this situation something unpredictable would happen;
5724 sometimes it was "internal error: store_reset failed".
5726 18. If a server dropped the connection unexpectedly when an Exim client was
5727 using GnuTLS and trying to read a response, the client delivery process
5728 crashed while trying to generate an error log message.
5730 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5731 string, for example:
5733 warn message = H1: something\nH2: something
5735 the text was added as a single header line from Exim's point of view
5736 though it ended up OK in the delivered message. However, searching for the
5737 second and subsequent header lines using $h_h2: did not work. This has been
5738 fixed. Similarly, if a system filter added multiple headers in this way,
5739 the routers could not see them.
5741 20. Expanded the error message when iplsearch is called with an invalid key to
5742 suggest using net-iplsearch in a host list.
5744 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5745 ACLs are no longer actually imposed (and a message to that effect is
5748 22. If a "gecos" field in a passwd entry contained escaped characters, in
5749 particular, if it contained a \" sequence, Exim got it wrong when building
5750 a From: or a Sender: header from that name. A second bug also caused
5751 incorrect handling when an unquoted " was present following a character
5752 that needed quoting.
5754 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5755 was not being matched caselessly.
5757 24. Arranged for all hyphens in the exim.8 source to be escaped with
5760 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5761 properly. Recipient callout cache records were still being keyed to include
5762 the sender, even when use_sender was set false. This led to far more
5763 callouts that were necessary. The sender is no longer included in the key
5764 when use_sender is false.
5766 26. Added "control = submission" modifier to ACLs.
5768 27. Added the ${base62d: operator to decode base 62 numbers.
5770 28. dnsdb lookups can now access SRV records.
5772 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5773 the configuration file.
5775 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5776 (-v) mode. This makes the output for a verbose queue run more intelligible.
5778 31. Added a use_postmaster feature to recipient callouts.
5780 32. Added the $body_zerocount variable, containing the number of binary zero
5781 bytes in the message body.
5783 33. The time of last modification of the "new" subdirectory is now used as the
5784 "mailbox time last read" when there is a quota error for a maildir
5787 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5789 35. Added +ignore_unknown as a special item in host lists.
5791 36. Code for decoding IPv6 addresses in host lists is now included, even if
5792 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5793 address was recognized as an IP address, but was then not correctly decoded
5794 into binary, causing unexpected and incorrect effects when compared with
5801 1. Very minor rewording of debugging text in manualroute to say "list of
5802 hosts" instead of "hostlist".
5804 2. If verify=header_syntax was set, and a header line with an unqualified
5805 address (no domain) and a large number of spaces between the end of the
5806 name and the colon was received, the reception process suffered a buffer
5807 overflow, and (when I tested it) crashed. This was caused by some obsolete
5808 code that should have been removed. The fix is to remove it!
5810 3. When running in the test harness, delay a bit after writing a bounce
5811 message to get a bit more predictability in the log output.
5813 4. Added a call to search_tidyup() just before forking a reception process. In
5814 theory, someone could use a lookup in the expansion of smtp_accept_max_
5815 per_host which, without the tidyup, could leave open a database connection.
5817 5. Added the variables $recipient_data and $sender_data which get set from a
5818 lookup success in an ACL "recipients" or "senders" condition, or a router
5819 "senders" option, similar to $domain_data and $local_part_data.
5821 6. Moved the writing of debug_print from before to after the "senders" test
5824 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5825 problems for message scanning, either using a data ACL, or using
5826 local_scan() because the Received: header was not generated till after they
5827 were called (in order to set the time as the time of reception completion).
5828 I have revised the way this works. The header is now generated after the
5829 body is received, but before the ACL or local_scan() are called. After they
5830 are run, the timestamp in the header is updated.
5836 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5837 before starting a queue runner without re-exec. This happened only when
5838 deliver_drop_privilege was set or when the Exim user was set to root. The
5839 effect of the bug was that timeouts during subsequent deliveries caused
5840 crashes instead of being properly handled. The handler is now left at its
5841 default (and expected) setting.
5843 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5844 message, again when deliver_drop_privilege is set or Exim is run as root.
5845 The bug described in (1) was not present in this case, but the tidying up
5846 of the other signals was missing. I have made the two cases consistent.
5848 3. The ignore_target_hosts setting on a manualroute router was being ignored
5849 for hosts that were looked up using the /MX notation.
5851 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5854 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5855 operated on the sender address. After changing the $sender_address to <>
5856 for the sender address verify, Exim was re-instated it as the original
5857 (before rewriting) address, but remembering that it had rewritten it, so it
5858 wasn't rewriting it again. This bug also had the effect of breaking the
5859 sender address verification caching when the sender address was rewritten.
5861 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5862 This has been changed so that if the ip literal address matches
5863 ignore_target_hosts, the router declines.
5865 7. Added expansion conditions match_domain, match_address, and match_local_
5866 part (NOT match_host).
5868 8. The placeholder for the Received: header didn't have a length field set.
5870 9. Added code to Exim itself and to exim_lock to test for a specific race
5871 condition that could lead to file corruption when using MBX delivery. The
5872 issue is with the lockfile that is created in /tmp. If this file is removed
5873 after a process has opened it but before that process has acquired a lock,
5874 there is the potential for a second process to recreate the file and also
5875 acquire a lock. This could lead to two Exim processes writing to the file
5876 at the same time. The added code performs the same test as UW imapd; it
5877 checks after acquiring the lock that its file descriptor still refers to
5878 the same named file.
5880 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5881 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5884 11. Added the smtp_active_hostname option. If used, this will typically be made
5885 to depend on the incoming interface address. Because $interface_address is
5886 not set up until the daemon has forked a reception process, error responses
5887 that can happen earlier (such as "too many connections") no longer contain
5890 12. If an expansion in a condition on a "warn" statement fails because a lookup
5891 defers, the "warn" statement is abandoned, and the next ACL statement is
5892 processed. Previously this caused the whole ACL to be aborted.
5894 13. Added the iplsearch lookup type.
5896 14. Added ident_timeout as a log selector.
5898 15. Added tls_certificate_verified as a log selector.
5900 16. Added a global option tls_require_ciphers (compare the smtp transport
5901 option of the same name). This controls incoming TLS connections.
5903 17. I finally figured out how to make tls_require_ciphers do a similar thing
5904 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5905 before starting the TLS session.
5907 18. Tabs are now shown as \t in -bP output.
5909 19. If the log selector return_path_on_delivery was set, Exim crashed when
5910 bouncing a message because it had too many Received: header lines.
5912 20. If two routers both had headers_remove settings, and the first one included
5913 a superfluous trailing colon, the final name in the first list and the
5914 first name in the second list were incorrectly joined into one item (with a
5915 colon in the middle).
5921 1. Added -C and -D options to the exinext utility, mainly to make it easier
5922 to include in the automated testing, but these could be helpful when
5923 multiple configurations are in use.
5925 2. The exinext utility was not formatting the output nicely when there was
5926 an alternate port involved in the retry record key, nor when there was a
5927 message id as well (for retries that were specific to a specific message
5928 and a specific host). It was also confused by IPv6 addresses, because of
5929 the additional colons they contain. I have fixed the IPv4 problem, and
5930 patched it up to do a reasonable job for IPv6.
5932 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5933 delivery, the log line now contains "pipelined" if PIPELINING was used.
5935 4. An SMTP transport process used to panic and die if the bind() call to set
5936 an explicit outgoing interface failed. This has been changed; it is now
5937 treated in the same way as a connect() failure.
5939 5. A reference to $sender_host_name in the part of a conditional expansion
5940 that was being skipped was still causing a DNS lookup. This no longer
5943 6. The def: expansion condition was not recognizing references to header lines
5944 that used bh_ and bheader_.
5946 7. Added the _cache feature to named lists.
5948 8. The code for checking quota_filecount in the appendfile transport was
5949 allowing one more file than it should have been.
5951 9. For compatibility with Sendmail, the command line option
5959 and sets the incoming protocol and host name (for trusted callers). The
5960 host name and its colon can be omitted when only the protocol is to be set.
5961 Note the Exim already has two private options, -pd and -ps, that refer to
5962 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5963 "s", but I don't think that's a major issue.
5965 10. A number of refactoring changes to the code, none of which should affect
5968 (a) The number of logging options was getting close to filling up the
5969 32-bit word that was used as a bit map. I have split them into two classes:
5970 those that are passed in the argument to log_write(), and those that are
5971 only ever tested independently outside of that function. These are now in
5972 separate 32-bit words, so there is plenty of room for expansion again.
5973 There is no change in the user interface or the logging behaviour.
5975 (b) When building, for example, log lines, the code previously used a
5976 macro that called string_cat() twice, in order to add two strings. This is
5977 not really sufficiently general. Furthermore, there was one instance where
5978 it was actually wrong because one of the argument was used twice, and in
5979 one call a function was used. (As it happened, calling the function twice
5980 did not affect the overall behaviour.) The macro has been replaced by a
5981 function that can join an arbitrary number of extra strings onto a growing
5984 (c) The code for expansion conditions now uses a table and a binary chop
5985 instead of a serial search (which was left over from when there were very
5986 few conditions). Also, it now recognizes conditions like "pam" even when
5987 the relevant support is not compiled in: a suitably worded error message is
5988 given if an attempt is made to use such a condition.
5990 11. Added ${time_interval:xxxxx}.
5992 12. A bug was causing one of the ddress fields not to be passed back correctly
5993 from remote delivery subprocesses. The field in question was not being
5994 subsequently used, so this caused to problems in practice.
5996 13. Added new log selectors queue_time and deliver_time.
5998 14. Might have fixed a bug in maildirsizefile handling that threw up
5999 "unexpected character" debug warnings, and recalculated the data
6000 unnecessarily. In any case, I expanded the warning message to give more
6003 15. Added the message "Restricted characters in address" to the statements in
6004 the default ACL that block characters like @ and % in local parts.
6006 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6007 Three changes have been made:
6009 (a) There was a serious bug; a negative response to MAIL caused the whole
6010 recipient domain to be cached as invalid, thereby blocking all messages
6011 to all local parts at the same domain, from all senders. This bug has
6012 been fixed. The domain is no longer cached after a negative response to
6013 MAIL if the sender used is not empty.
6015 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6018 (c) A new callout option, "use_sender" has been added for people who want
6019 the modified behaviour.
6025 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6028 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6029 indeed breaks things for older releases.
6031 3. Added additional logging to the case where there is a problem reading data
6032 from a filter that is running in a subprocess using a pipe, in order to
6033 try to track down a specific problem.
6035 4. Testing facility fudge: when running in the test harness and attempting
6036 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6037 getting "No route to host". Convert this to a timeout.
6039 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6042 6. Some OS don't have socklen_t but use size_t instead. This affects the
6043 fifth argument of getsockopt() amongst other things. This is now
6044 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6045 can be set for individual OS. I have set it for SunOS5, OSF1, and
6046 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6047 some earlier ones do not.
6049 7. Change 4.30/15 was not doing the test caselessly.
6051 8. The standard form for an IPv6 address literal was being rejected by address
6052 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6053 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6054 this, as well as the form without the "IPv6" on the front (but only when
6055 address literals are enabled, of course).
6057 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6059 10. Exim crashed if a message with an empty sender address specified by -f
6060 encountered a router with an errors_to setting. This could be provoked only
6061 by a command such as
6065 where an empty string was supplied; "<>" did not hit this bug.
6067 11. Installed PCRE release 4.5.
6069 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6070 remained set. It is now erased.
6072 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6073 times from message ids (which are base 36 rather than the normal 62).
6075 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6076 were being counted as actual protocol errors, and logged if the log
6077 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6078 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6079 and DATA following a set of rejected RCPTs do not count as protocol errors.
6080 In other words, Exim assumes they were pipelined, though this may not
6081 actually be the case. Of course, in all cases the client gets an
6082 appropriate error code.
6084 15. If a lookup fails in an ACL condition, a message about the failure may
6085 be available; it is used if testing the ACL cannot continue, because most
6086 such messages specify what the cause of the deferral is. However, some
6087 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6088 that caused an old message to be retained and used if a later statement
6089 caused a defer, replacing the real cause of the deferral.
6091 16. If an IP address had so many PTR records that the DNS lookup buffer
6092 was not large enough to hold them, Exim could crash while trying to process
6093 the truncated data. It now detects and logs this case.
6095 17. Further to 4.21/58, another change has been made: if (and only if) the
6096 first line of a message (the first header line) ends with CRLF, a bare LF
6097 in a subsequent header line has a space inserted after it, so as not to
6098 terminate the header.
6100 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6101 unnecessarily, used atoi() instead of strtol(), and didn't check the
6102 termination when getting file sizes from file names by regex.
6104 19. Completely re-implemented the support for maildirsize files, in the light
6105 of a number of problems with the previous contributed implementation
6106 (4.30/29). In particular:
6108 . If the quota is zero, the maildirsize file is maintained, but no quota is
6111 . If the maildir directory does not exist, it is created before any attempt
6112 to write a maildirsize file.
6114 . The quota value in the file is just a cache; if the quota is changed in
6115 the transport, the new value overrides.
6117 . A regular expression is available for excluding directories from the
6120 20. The autoreply transport checks the characters in options that define the
6121 message's headers; it allows continued headers, but it was checking with
6122 isspace() after an embedded newline instead of explicitly looking for a
6125 21. If all the "regular" hosts to which an address was routed had passed their
6126 expiry times, and had not reached their retry times, the address was
6127 bounced, even if fallback hosts were defined. Now Exim should go on to try
6130 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6131 equivalent code in the SMTP transport. Some hosts send humungous responses
6132 to HELO/EHLO, more than 1024 it seems.
6134 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6135 gives compiler warnings in some environments. I've now done it "properly",
6138 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6139 (because of problems with the built-in one) was declared to return uschar *
6140 instead of char *, causing compiler failure.
6142 25. Fixed a file descriptor leak when processing alias/forward files.
6144 26. Fixed a minor format string issue in dbfn.c.
6146 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6148 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6149 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6152 29. When a sender address is verified, it is cached, to save repeating the test
6153 when there is more than one recipient in a message. However, when the
6154 verification involves a callout, it is possible for different callout
6155 options to be set for different recipients. It is too complicated to keep
6156 track of this in the cache, so now Exim always runs a verification when a
6157 callout is required, relying on the callout cache for the optimization.
6158 The overhead is duplication of the address routing, but this should not be
6161 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6162 to be verified with callout=postmaster, and the main callout worked but the
6163 postmaster check failed, the verification correctly failed. However, if a
6164 subsequent RCPT command asked for sender verification *without* the
6165 postmaster check, incorrect caching caused this verification also to fail,
6168 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6169 it was not caching the DNS options (qualify_single, search_parents) that
6170 were used when the lookup failed. A subsequent lookup with different
6171 options therefore always gave the same answer, though there were cases
6172 where it should not have. (Example: a "domains = !$mx_any" option on a
6173 dnslookup router: the "domains" option is always processed without any
6174 widening, but the router might have qualify_single set.) Now Exim uses the
6175 cached value only when the same options are set.
6177 32. Added John Jetmore's "exipick" utility to the distribution.
6179 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6180 than a timeout (e.g. a certificate is required, and is not provided), an
6181 Exim server now closes the connection immediately. Previously it waited for
6182 the client to close - but if the client is SSL, it seems that they each
6183 wait for each other, leading to a delay before one of them times out.
6185 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6186 maintained 0.8.x compatibility because I don't think many are using it, and
6187 it is clearly obsolete.
6189 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6192 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6193 client certificate was expired. A simple patch fixes this, though I don't
6194 understand the full logic of why the verify callback is called multiple
6197 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6198 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6199 which causes problems with some clients (such as the Certicom SSL Plus
6200 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6201 disables the coutermeasure allowing Eudora to connect."
6203 38. Exim was not checking that a write() to a log file succeeded. This could
6204 lead to Bad Things if a log got too big, in particular if it hit a file
6205 size limit. Exim now panics and dies if it cannot write to a log file, just
6206 as it does if it cannot open a log file.
6208 39. Modified OS/Makefile-Linux so that it now contains
6210 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6212 The two -D definitions ensure that Exim is compiled with large file
6213 support, which makes it possible to handle log files that are bigger than
6216 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6217 instance) a domain was checked against a named list that involved a lookup,
6218 causing $domain_data to be set, then another domain was checked against the
6219 same list, then the first domain was re-checked, the value of $domain_data
6220 after the final check could be wrong. In particular, if the second check
6221 failed, it could be set empty. This bug probably also applied to
6224 41. The strip_trailing_dot option was not being applied to the address given
6225 with the -f command-line option.
6227 42. The code for reading a message's header from the spool was incrementing
6228 $received_count, but never initializing it. This meant that the value was
6229 incorrect (doubled) while delivering a message in the same process in which
6230 it was received. In the most common configuration of Exim, this never
6231 happens - a fresh exec is done - but it can happen when
6232 deliver_drop_privilege is set.
6234 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6235 it now includes up to 150 characters of the unexpected data in the log
6238 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6239 and building data strings. The size of both of these buffers was 10 000
6240 bytes - far larger than anybody would *ever* want, thought I. Needless to
6241 say, somebody hit the limit. I have increased the maximum line length to
6242 20 000 and the maximum data length of concatenated lines to 100 000. I have
6243 also fixed two bugs, because there was no checking on these buffers. Tsk,
6244 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6245 buffer is too small.
6247 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6248 lsearch lookups. Now it does.
6250 46. When parsing a route_list item in a manualroute router, a fixed-length
6251 buffer was used for the list of hosts. I made this 1024 bytes long,
6252 thinking that nobody would ever have a list of hosts that long. Wrong.
6253 Somebody had a whole pile of complicated expansion conditions, and the
6254 string was silently truncated, leading to an expansion error. It turns out
6255 that it is easier to change to an unlimited length (owing to other changes
6256 that have happened since this code was originally written) than to build
6257 structure for giving a limitation error. The length of the item that
6258 expands into the list of hosts is now unlimited.
6260 47. The lsearch lookup could not handle data where the length of text line was
6261 more than 4095 characters. Such lines were truncated, leading to shortened
6262 data being returned. It should now handle lines of any length.
6264 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6265 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6268 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6269 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6270 no longer happens in comment lines. A list of replacements is now placed
6271 at the head of all of the source files, except those whose only change is
6272 to replace PERL_COMMAND in the very first #! line.
6274 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6275 messages on the queue, with a bottom-up merge sort, using code contributed
6276 by Michael Haardt. This should make operations like -bp somewhat faster on
6277 large queues. It won't affect queue runners, except when queue_run_in_order
6280 51. Installed eximstats 1.31 in the distribution.
6282 52. Added support for SRV lookups to the dnslookup router.
6284 53. If an ACL referred to $message_body or $message_body_end, the value was not
6285 reset for any messages that followed in the same SMTP session.
6287 54. The store-handling optimization for building very long strings was not
6288 differentiating between the different store pools. I don't think this
6289 actually made any difference in practice, but I've tidied it.
6291 55. While running the routers to verify a sender address, $sender_address
6292 was still set to the sender address. This is wrong, because when routing to
6293 send a bounce to the sender, it would be empty. Therefore, I have changed
6294 it so that, while verifying a sender address, $sender_address is set to <>.
6295 (There is no change to what happens when verifying a recipient address.)
6297 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6298 target A or AAAA records (if not already returned) without resetting the
6299 qualify_single or search_parents options of the DNS resolver. These are
6300 inappropriate in this case because the targets of MX and SRV records must
6301 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6302 target that, when qualified, matched something in the local domain. These
6303 two options are now turned off when doing these lookups.
6305 57. It seems that at least some releases of Reiserfs (which does not have the
6306 concept of a fixed number of inodes) returns zero and not -1 for the
6307 number of available inodes. This interacted badly with check_spool_inodes,
6308 which assumed that -1 was the "no such thing" setting. What I have done is
6309 to check that the total number of inodes is greater than zero before doing
6310 the test of how many are available.
6312 58. When a "warn" ACL statement has a log_message modifier, the message is
6313 remembered, and not repeated. This is to avoid a lot of repetition when a
6314 message has many recipients that cause the same warning to be written.
6315 However, Exim was preserving the list of already written lines for an
6316 entire SMTP session, which doesn't seem right. The memory is now reset if a
6317 new message is started.
6319 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6320 debugging output unless log_rewrite was also set.
6322 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6323 of (int)(handle) when we know that handle contains (void *)(-1).
6325 61. The Exim daemon panic-logs an error return when it closes the incoming
6326 connection. However "connection reset by peer" seems to be common, and
6327 isn't really an error worthy of noting specially, so that particular error
6330 62. When Exim is trying to find all the local interfaces, it used to panic and
6331 die if the ioctl to get the interface flags failed. However, it seems that
6332 on at least one OS (Solaris 9) it is possible to have an interface that is
6333 included in the list of interfaces, but for which you get a failure error
6334 for this call. This happens when the interface is not "plumbed" into a
6335 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6336 failure of the "get flags" call assumes that the interface is down.
6338 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6339 makes life easier for people who are doing arithmetic on fields extracted
6340 from dates, where you often get leading zeros that should not be
6341 interpreted as octal.
6343 64. Added qualify_domain to the redirect router, to override the global
6346 65. If a pathologically long header line contained very many addresses (the
6347 report of this problem mentioned 10 000) and each of them was rewritten,
6348 Exim could use up a very large amount of memory. (It kept on making new
6349 copies of the header line as it rewrote, and never released the old ones.)
6350 At the expense of a bit more processing, the header rewriting function has
6351 been changed so that it no longer eats memory in this way.
6353 66. The generation of the Received: header has been moved from the time that a
6354 message starts to be received, to the time that it finishes. The timestamp
6355 in the Received: header should now be very close to that of the <= log
6356 line. There are two side-effects of this change:
6358 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6359 logged header lines no longer include the local Received: line, because
6360 it has not yet been created. The same applies to a copy of the message
6361 that is returned to a non-SMTP sender when a message is rejected.
6363 (b) When a filter file is tested using -bf, no additional Received: header
6364 is added to the test message. After some thought, I decided that this
6367 This change does not affect the value of $received_for. It is still set
6368 after address rewriting, but before local_scan() is called.
6370 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6372 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6373 gave an unhelpful panic error message, and a defer error. I have managed to
6374 change this behaviour so that it now rejects any supplied certificate,
6375 which seems right, as the list of acceptable certificates is empty.
6377 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6378 gave an unhelpful defer error. I have not managed to make this reject any
6379 supplied certificates, but the error message it gives is "no certificate
6380 supplied", which is not helpful.
6382 70. exigrep's output now also includes lines that are not associated with any
6383 message, but which match the given pattern. Implemented by a patch from
6384 Martin Sluka, which also tidied up the Perl a bit.
6386 71. Recipient callout verification, like sender verification, was using <> in
6387 the MAIL FROM command. This isn't really the right thing, since the actual
6388 sender may affect whether the remote host accepts the recipient or not. I
6389 have changed it to use the actual sender in the callout; this means that
6390 the cache record is now keyed on a recipient/sender pair, not just the
6391 recipient address. There doesn't seem to be a real danger of callout loops,
6392 since a callout by the remote host to check the sender would use <>.
6393 [SEE ABOVE: changed after hitting problems.]
6395 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6396 temporary errors. However, in the case of such a code being given after
6397 the end of a data transmission (i.e. after ".") Exim was failing to write
6398 a retry record for the message. (Yes, there was some broken host that was
6399 actually sending 8xx at this point.)
6401 73. An unknown lookup type in a host list could cause Exim to panic-die when
6402 the list was checked. (An example that provoked this was putting <; in the
6403 middle of a list instead of at the start.) If this happened during a DATA
6404 ACL check, a -D file could be left lying around. This kind of configuration
6405 error no longer causes Exim to die; instead it causes a defer error. The
6406 incident is still logged to the main and panic logs.
6408 74. Buglet left over from Exim 3 conversion. The message "too many messages
6409 in one connection" was written to the rejectlog but not the mainlog, except
6410 when address rewriting (yes!) was being logged.
6412 75. Added write_rejectlog option.
6414 76. When a system filter was run not as root (that is, when system_filter_user
6415 was set), the values of the $n variables were not being returned to the
6416 main process; thus, they were not subsequently available in the $sn
6419 77. Added +return_path_on_delivery log selector.
6421 78. A connection timeout was being treated differently from recipients deferred
6422 when testing hosts_max_try with a message that was older than the host's
6423 retry timeout. (The host should not be counted, thus allowing all hosts to
6424 be tried at least once before bouncing.) This may have been the cause of an
6425 occasionally reported bug whereby a message would remain on the queue
6426 longer than the retry timeout, but would be bounced if a delivery was
6427 forced. I say "may" because I never totally pinned down the problem;
6428 setting up timeout/retry tests is difficult. See also the next item.
6430 79. The ultimate address timeout was not being applied to errors that involved
6431 a combination of host plus message (for example, a timeout on a MAIL
6432 command). When an address resolved to a number of possible hosts, and they
6433 were not all tried for each delivery (e.g. because of hosts_max_try), a
6434 message could remain on the queue longer than the retry timeout.
6436 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6439 81. Fixed an obscure SMTP outgoing bug which required at least the following
6440 conditions: (a) there was another message waiting for the same server;
6441 (b) the server returned 5xx to all RCPT commands in the first message so
6442 that the message was not completed; (c) the server dropped the connection
6443 or gave a negative response to the RSET that Exim sends to abort the
6444 transaction. The observed case was a dropped connection after DATA that had
6445 been sent in pipelining mode. That is, the server had advertised PIPELINING
6446 but was not implementing it correctly. The effect of the bug was incorrect
6447 behaviour, such as trying another host, and this could lead to a crash.
6453 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6454 and daemon.c were passed as pointers to ints; they should have been
6455 pointers to socklen_t variables (which are typically unsigned ints).
6457 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6460 3. Fixed a really odd bug that affected only the testing scheme; patching a
6461 certain fixed string in the binary changed the value of another string that
6462 happened to be identical to the end of the original first string.
6464 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6465 name", it returns that address as the IP address. On some operating
6466 systems (e.g. Solaris), it also passes back the IP address string as the
6467 "host name". However, on others (e.g. Linux), it passes back an empty
6468 string. Exim wasn't checking for this, and was changing the host name to an
6469 empty string, assuming it had been canonicalized.
6471 5. Although rare, it is permitted to have more than one PTR record for a given
6472 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6473 all the names associated with an address, because they do in Solaris.
6474 However, it seems that they do not in Linux for data that comes from the
6475 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6476 I found this out when I moved to a new Linux workstation and tried to run
6477 the Exim test suite.
6479 To get round this problem I have changed the code so that it now does its
6480 own call to the DNS to look up PTR records when searching for a host name.
6481 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6482 addresses that are only in /etc/hosts are still found.
6484 This behaviour is, however, controlled by an option called host_lookup_
6485 order, which defaults to "bydns:byaddr". If people want to use the other
6486 order, or indeed, just use one or the other means of lookup, they can
6487 specify it in this variable.
6489 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6490 some operating systems, this comes back from gethostbyaddr() as an empty
6491 string, and this is what Exim used to test for. However, it seems that in
6492 other systems, "." is yielded. Exim now tests for this case too.
6494 7. The values of check_spool_space and check_log_space are now held internally
6495 as a number of kilobytes instead of an absolute number of bytes. If a
6496 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6497 kilobyte. This means that much larger values can be stored.
6499 8. Exim monitor: an attempt to get the action menu when not actually pointing
6500 at a message produces an empty menu entitled "No message selected". This
6501 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6502 no entries in it ("Shell widget menu has zero width and/or height"). So I
6503 have added a single, blank menu entry in this case.
6505 9. Added ${quote_local_part.
6507 10. MIME decoding is now applied to the contents of Subject: header lines when
6510 11. Now that a reference to $sender_host_address automatically causes a reverse
6511 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6512 host lookup before query-style lookups in lists that might use this
6513 variable. This has therefore been abolished, and the "net-" prefix is no
6514 longer necessary for query-style lookups.
6516 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6517 have been a typo for LFLAGS, so it has been changed.
6519 13. The install script calls Exim with "-C /dev/null" in order to find the
6520 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6521 to be output. However, since Exim outputs its version number before the
6522 error, it didn't break the script. It just looked ugly. I fixed this by
6523 always allowing "-C /dev/null" if the caller is root.
6525 14. Ignore overlarge ACL variable number when reading spool file - insurance
6526 against a later release with more variables having written the file.
6528 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6529 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6530 this, as well as the form without the "IPv6" on the front.
6532 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6533 OS/Makefile-Darwin file.
6535 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6536 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6538 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6539 variable. However, some OS use ints for inodes. I've added cast to long int
6540 to get rid of the compiler warning.
6542 19. I had forgotten to lock out "/../" in configuration file names when
6543 ALT_CONFIG_PREFIX was set.
6545 20. Routers used for verification do not need to specify transports. However,
6546 if such a router generated a host list, and callout was configured, Exim
6547 crashed, because it could not find a port number from the (non-existent)
6548 transport. It now assumes port 25 in this circumstance.
6550 21. Added the -t option to exigrep.
6552 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6553 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6554 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6555 them is set, LOOKUP_LSEARCH is forced.
6557 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6559 24. Added sender and host information to the "rejected by local_scan()" log
6560 line; previously there was no indication of these.
6562 25. Added .include_if_exists.
6564 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6565 Linux. It turns out that not all file systems support this. Apparently some
6566 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6567 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6568 not supported on the file descriptor, is now ignored when Exim is trying to
6569 sync a directory. This applies only to Linux.
6571 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6573 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6574 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6577 29. Added support for maildirsize files from supplied patch (modified a bit).
6579 30. The use of :fail: followed by an empty string could lead Exim to respond to
6580 sender verification failures with (e.g.):
6582 550 Verification failed for <xxx>
6583 550 Sender verify failed
6585 where the first response line was missing the '-' that indicates it is not
6586 the final line of the response.
6588 31. The loop for finding the name of the user that called Exim had a hardwired
6589 limit of 10; it now uses the value of finduser_retries, which is used for
6590 all other user lookups.
6592 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6595 33. Exim was neglecting to zero errno before one call of strtol() when
6596 expanding a string and expecting an integer value. On some systems this
6597 resulted in spurious "integer overflow" errors. Also, it was casting the
6598 result into an int without checking.
6600 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6601 did not work. The code looks as if it has *never* worked, though it appears
6602 to have been documented since at least release 1.62. I have made it work.
6604 35. The "timeout_DNS" error in retry rules, also documented since at least
6605 1.62, also never worked. As it isn't clear exactly what this means, and
6606 clearly it isn't a major issue, I have abolished the feature by treating it
6607 as "timeout", and writing a warning to the main and panic logs.
6609 36. The display of retry rules for -brt wasn't always showing the error code
6612 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6613 timeout_connect_A, timeout_connect_MX.
6615 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6616 to the empty sender.
6618 39. The daemon was not analysing the content of -oX till after it had closed
6619 stderr and disconnected from the controlling terminal. This meant that any
6620 syntax errors were only noted on the panic log, and the return code from
6621 the command was 0. By re-arranging the code a little, I've made the
6622 decoding happen first, so such errors now appear on stderr, and the return
6623 code is 1. However, the actual setting up of the sockets still happens in
6624 the disconnected process, so errors there are still only recorded on the
6627 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6628 connections (as happens on some IP stacks) was logged at start up time as
6629 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6630 it from "IPv6 and IPv4", which means that two separate sockets are being
6633 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6634 says whether AF_INET or AF_INET6 was passed as an argument.
6636 42. Exiwhat output was messed up when time zones were included in log
6639 43. Exiwhat now gives more information about the daemon's listening ports,
6640 and whether -tls-on-connect was used.
6642 44. The "port" option of the smtp transport is now expanded.
6644 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6645 silently ignored. Now an error message is written to the main and panic
6648 46. There's a new ACL modifier called "logwrite" which writes to a log file
6649 as soon as it is encountered.
6651 47. Added $local_user_uid and $local_user_gid at routing time.
6653 48. Exim crashed when trying to verify a sender address that was being
6656 49. Exim was recognizing only a space character after ".include". It now also
6657 recognizes a tab character.
6659 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6660 extracting the relevant information from the specification. The man page no
6661 longer contains scrambled data for the -d option, and I've added a section
6662 at the front about calling Exim under different names.
6664 51. Added "extra_headers" argument to the "mail" command in filter files.
6666 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6669 53. Installed eximstats 1.29.
6671 54. Added transport_filter_timeout as a generic transport option.
6673 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6674 Cc: header lines. This was required by RFC 822, but it not required by RFC
6677 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6678 incoming messages that did not have them. Now it does so only if the
6679 message originates locally, that is, if there is no associated remote host
6680 address. When Resent- header lines are present, this applies to the Resent-
6681 lines rather than the non-Resent- lines.
6683 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6684 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6686 58. Messages for configuration errors now include the name of the main
6687 configuration file - useful now that there may be more than one file in a
6688 list (.included file names were always shown).
6690 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6691 for those rare installations that do not start the daemon as root or run it
6692 setuid root. I've cut out the call to initgroups() if the daemon is not
6695 60. The Exim user and group can now be bound into the binary as text strings
6696 that are looked up at the start of Exim's processing.
6698 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6700 62. Added $mailstore_basename variable.
6702 63. Installed patch to sieve.c from Michael Haardt.
6704 64. When Exim failed to open the panic log after failing to open the main log,
6705 the original message it was trying to log was written to stderr and debug
6706 output, but if they were not available (the usual case in production), it
6707 was lost. Now it is written to syslog before the two lines that record the
6708 failures to open the logs.
6710 65. Users' Exim filters run in subprocesses under the user's uid. It is
6711 possible for a "deliver" command or an alias in a "personal" command to
6712 provoke an address rewrite. If logging of address rewriting is configured,
6713 this fails because the process is not running as root or exim. There may be
6714 a better way of dealing with this, but for the moment (because 4.30 needs
6715 to be released), I have disabled address rewrite logging when running a
6716 filter in a non-root, non-exim process.
6722 1. The buildconfig auxiliary program wasn't quoting the value set for
6723 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6724 not defined. This bug was masked in 4.22 by the effect that was fixed in
6727 2. Some messages that were rejected after a message id was allocated were
6728 shown as "incomplete" by exigrep. It no longer does this for messages that
6729 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6731 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6732 have allow_domain_literals set, the ID did not get logged in the <= line.
6733 Domain literals are now always recognized in Message-ID: header lines.
6735 4. The first argument for a ${extract expansion item is the key name or field
6736 number. Leading and trailing spaces in this item were not being ignored,
6737 causing some misleading effects.
6739 5. When deliver_drop_privilege was set, single queue runner processes started
6740 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6741 same command in the process it spins off) were not dropping privilege.
6743 6. When the daemon running as "exim" started a queue runner, it always
6744 re-executed Exim in the spun-off process. This is a waste of effort when
6745 deliver_drop_privilege is set. The new process now just calls the
6746 queue-runner function directly.
6752 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6755 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6756 ignored. Though the use of -oP was forcing the writing of a pid file, it
6757 was always written to the default place.
6759 3. If the message "no IP address found for host xxxx" is generated during
6760 incoming verification, it is now followed by identification of the incoming
6761 connection (so you can more easily find what provoked it).
6763 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6765 5. Added some features to "harden" Exim a bit more against certain attacks:
6767 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6768 be put in Local/Makefile. This is like the never_users runtime option,
6769 but it cannot be overridden. The default setting is "root".
6771 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6772 prefix string with which any file named in a -C command line option
6775 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6776 is retained for -C and -D only if the caller of Exim is root. Without
6777 it, the exim user may also use -C and -D and retain privilege.
6779 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6780 command line option is disabled.
6782 6. Macro names set by the -D option must start with an upper case letter, just
6783 like macro names defined in the configuration file.
6785 7. Added "dereference=" facility to LDAP.
6787 8. Two instances of the typo "uknown" in the source files are fixed.
6789 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6790 the Configure-Makefile script screwed up while processing it.
6792 10. Incorporated PCRE 4.4.
6794 11. The SMTP synchronization check was not operating right at the start of an
6795 SMTP session. For example, it could not catch a HELO sent before the client
6796 waited for the greeting. There is now a check for outstanding input at the
6797 point when the greeting is written. Because of the duplex, asynchronous
6798 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6799 way, but not yet received, when the check is performed.
6801 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6802 on TCP/IP sockets, because this apparently causes some broken clients to
6805 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6806 unchanged) from the Cygwin maintainer.
6808 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6809 was supported instead of testing for mbx. Effectively a typo.
6811 15. The spa authenticator server code was not checking that the input it
6812 received was valid base64.
6814 16. The debug output line for the "set" modifier in ACLs was not showing the
6815 name of the variable that was being set.
6817 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6819 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6820 lookup on its own. Something else was needed to trigger the lookup. For
6821 example, a match in host_lookup or the need for a host name in a host list.
6822 Now, if $sender_host_name is referenced and the host name has not yet been
6823 looked up, a lookup is performed. If the lookup fails, the variable remains
6824 empty, and $host_lookup_failed is set to "1".
6826 19. Added "eqi" as a case-independent comparison operator.
6828 20. The saslauthd authentication condition could segfault if neither service
6829 nor realm was specified.
6831 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6832 error message that was logged was misleading, and incoming SMTP
6833 connections were dropped. The message is now more accurate, and temporary
6834 errors are given to SMTP connections.
6836 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6837 (except RSET) with a 421 error, until QUIT is received. However, it was
6838 failing to send a response to QUIT.
6840 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6841 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6842 ACL is now run after the helo_try_verify_hosts code.
6844 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6845 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6846 case-independent, so other case variants are also recognized). Apparently
6847 some systems use these upper case variants.
6849 25. If more than two messages were waiting for the same host, and a transport
6850 filter was specified for the transport, Exim sent two messages over the
6851 same TCP/IP connection, and then failed with "socket operation on non-
6852 socket" when it tried to send the third.
6854 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6856 27. The extern definition of crypt16() in expand.c was not being excluded when
6857 the OS had its own crypt16() function.
6859 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6860 as a preferred synonym for return_size_limit, both as an option and as an
6863 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6865 30. Changed the default configuration ACL to relax the local part checking rule
6866 for addresses that are not in any local domains. For these addresses,
6867 slashes and pipe symbols are allowed within local parts, but the sequence
6868 /../ is explicitly forbidden.
6870 31. SPA server authentication was not clearing the challenge buffer before
6873 32. log_message in a "warn" ACL statement was writing to the reject log as
6874 well as to the main log, which contradicts the documentation and doesn't
6875 seem right (because no rejection is happening). So I have stopped it.
6877 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6878 However, I am unable to do any testing of this.
6880 34. Fixed an infelicity in the appendfile transport. When checking directories
6881 for a mailbox, to see if any needed to be created, it was accidentally
6882 using path names with one or more superfluous leading slashes; tracing
6883 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6885 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6886 contents are added to the log line that is written for every discarded
6887 recipient. (Previously a log_message setting was ignored.)
6889 36. The ${quote: operator now quotes the string if it is empty.
6891 37. The install script runs exim in order to find its version number. If for
6892 some reason other than non-existence or emptiness, which it checks, it
6893 could not run './exim', it was installing it with an empty version number,
6894 i.e. as "exim-". This error state is now caught, and the installation is
6897 38. An argument was missing from the function that creates an error message
6898 when Exim fails to connect to the socket for saslauthd authentication.
6899 This could cause Exim to crash, or give a corrupted message.
6901 39. Added isip, isip4, and isip6 to ${if conditions.
6903 40. The ACL variables $acl_xx are now saved with the message, and can be
6904 accessed later in routers, transports, and filters.
6906 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6907 strings in the file are not string-expanded.
6909 42. If a MAIL command specified a SIZE value that was too large to fit into an
6910 int variable, the check against message_size_limit failed. Such values are
6911 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6912 day this will have to be increased, but I don't think I want to be around
6913 when emails are that large.
6920 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6921 iconv() is not standard in FreeBSD.
6923 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6924 IPv6 enabled. The observed symptom was a segmentation fault on return from
6925 the function os_common_find_running_interfaces() in src/os.c.
6927 3. In the check_special_case() function in daemon.c I had used "errno" as an
6928 argument name, which causes warnings on some systems. This was basically a
6929 typo, since it was named "eno" in the comments!
6931 4. The code that waits for the clock to tick (at a resolution of some fraction
6932 of a second) so as to ensure message-id uniqueness was always waiting for
6933 at least one whole tick, when it could have waited for less. [This is
6934 almost certainly not relevant at current processor speeds, where it is
6935 unlikely to ever wait at all. But we try to future-proof.]
6937 5. The function that sleeps for a time interval that includes fractions of a
6938 second contained a race. It did not block SIGALRM between setting the
6939 timer, and suspending (a couple of lines later). If the interval was short
6940 and the sigsuspend() was delayed until after it had expired, the suspension
6941 never ended. On busy systems this could lead to processes getting stuck for
6944 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6945 process, before it forks any delivery processes. The open lookup caching
6946 mechanism meant that the open file or database connection was passed into
6947 the delivery process. The problem was that delivery processes always tidy
6948 up cached lookup data. This could cause a problem for the next delivery
6949 process started by the queue runner, because the external queue runner
6950 process does not know about the closure. So the next delivery process
6951 still has data in the lookup cache. In the case of a file lookup, there was
6952 no problem because closing a file descriptor in a subprocess doesn't affect
6953 the parent. However, if the lookup was caching a connection to a database,
6954 the connection was closed, and the second delivery process was likely to
6955 see errors such as "PGSQL: query failed: server closed the connection
6956 unexpectedly". The problem has been fixed by closing all cached lookups
6957 in a queue runner before running a delivery process.
6959 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6960 seem to have the "const" qualifier which it has on other OS. I've
6963 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6964 *of the same type* (client or server) with the same public name that an
6965 error should be diagnosed.
6967 9. When Exim looked up a host name for an IP address, but failed to find the
6968 original IP address when looking up the host name (a safety check), it
6969 output the message "<ip address> does not match any IP for NULL", which was
6970 confusing, to say the least. The bug was that the host name should have
6971 appeared instead of "NULL".
6973 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6974 user that is built into the binary, and the -C or -D options is used, root
6975 privilege is dropped before the configuration file is read. In addition,
6976 logging is switched to stderr instead of the normal log files. If the
6977 configuration then re-defines the Exim user, the unprivileged environment
6978 is probably not what is expected, so Exim logs a panic warning message (but
6981 However, if deliver_drop_privilege is set, the unprivileged state may well
6982 be exactly what is intended, so the warning has been cut out in that case,
6983 and Exim is allowed to try to write to its normal log files.
6989 1. smtp_return_error_details was not giving details for temporary sender
6990 or receiver verification errors.
6992 2. Diagnose a configuration error if two authenticators have the same public
6995 3. Exim used not to create the message log file for a message until the first
6996 delivery attempt. This could be confusing when incoming messages were held
6997 for policy or load reasons. The message log file is now created at the time
6998 the message is received, and an initial "Received" line is written to it.
7000 4. The automatically generated man page for command line options had a minor
7001 bug that caused no ill effects; however, a more serious problem was that
7002 the procedure for building the man page automatically didn't always
7003 operate. Consequently, release 4.20 contains an out-of-date version. This
7004 shouldn't happen again.
7006 5. When building Exim with embedded Perl support, the script that builds the
7007 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7008 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7010 6. The freeze_tell option was not being used for messages that were frozen on
7011 arrival, either by an ACL or by local_scan().
7013 7. Added the smtp_incomplete_transaction log selector.
7015 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7016 was accepting AUTH without a new EHLO.
7018 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7019 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7022 10. Logging of TCP/IP connections (when configured) now happens in the main
7023 daemon process instead of the child process, so that the TCP/IP connection
7024 count is more accurate (but it can never be perfect).
7026 11. The use of "drop" in a nested ACL was not being handled correctly in the
7027 outer ACL. Now, if condition failure induced by the nested "drop" causes
7028 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7029 or "require"), the connection is dropped.
7031 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7032 that yield "discard" can now be used with an "accept" or a "discard" verb,
7033 but an error is generated for any others (because I can't see a useful way
7034 to define what should happen).
7036 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7037 are now processed in the same way as lines in the Exim configuration file.
7038 In particular, continuation lines are supported.
7040 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7042 15. Added -ti meaning -t -i.
7044 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7045 domains, and warn by logging if others are found.
7047 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7048 returned from GIFCONF when Exim is trying to find the list of interfaces on
7049 a host. The code in os.c has been modified to copy each ifreq to an aligned
7050 structure in all cases.
7052 Also, in some cases, the returned ifreq's were being copied to a 'struct
7053 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7054 means the last couple of bytes of an IPv6 address could be chopped if the
7055 ifreq contained only a normal sockaddr (14 bytes storage).
7057 18. Named domain lists were not supported in the hosts_treat_as_local option.
7058 An entry such as +xxxx was not recognized, and was treated as a literal
7061 19. Ensure that header lines added by a DATA ACL are included in the reject log
7062 if the ACL subsequently rejects the message.
7064 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7065 MD5 (which is deprecated).
7067 21. When testing a filter file using -bf, Exim was writing a message when it
7068 took the sender from a "From " line in the message, but it was not doing so
7069 when it took $return_path from a Return-Path: header line. It now does.
7071 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7072 with a valid header line field name (a series of printing characters
7073 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7075 23. Changed "disc" in the source to "disk" to conform to the documentation and
7076 the book and for uniformity.
7078 24. Ignore Sendmail's -Ooption=value command line item.
7080 25. When execve() failed while trying to run a command in a pipe transport,
7081 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7082 could be confused with a return value of 69 from the command itself. This
7083 has been changed to 127, the value the shell returns if it is asked to run
7084 a non-existent command. The wording for the related log line suggests a
7085 non-existent command as the problem.
7087 26. If received_header_text expands to an empty string, do not add a Received:
7088 header line to the message. (Well, it adds a token one on the spool, but
7089 marks it "old" so that it doesn't get used or transmitted.)
7091 27. Installed eximstats 1.28 (addition of -nt option).
7093 28. There was no check for failure on the call to getsockname() in the daemon
7094 code. This can fail if there is a shortage of resources on the system, with
7095 ENOMEM, for example. A temporary error is now given on failure.
7097 29. Contrary to the C standard, it seems that in some environments, the
7098 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7099 program. Exim now does this explicitly; it affects the formatting of
7100 timestamps using strftime().
7102 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7103 complaints. I've now initialized all the variables, to avoid this.
7105 32. Header lines added by a system filter were not being "seen" during
7106 transport-time rewrites.
7108 33. The info_callback() function passed to OpenSSL is set up with type void
7109 (*)(SSL *, int, int), as described somewhere. However, when calling the
7110 function (actually a macro) that sets it up, the type void(*)() is
7111 expected. I've put in a cast to prevent warnings from picky compilers.
7113 34. If a DNS black list lookup found a CNAME record, but there were no A
7114 records associated with the domain it pointed at, Exim crashed.
7116 35. If a DNS black list lookup returned more than one A record, Exim ignored
7117 all but the first. It now scans all returned addresses if a particular IP
7118 value is being sought. In this situation, the contents of the
7119 $dnslist_value variable are a list of all the addresses, separated by a
7122 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7123 to accept a host name and all its aliases if the forward lookup for any of
7124 them yielded the IP address of the incoming connection. Now it accepts only
7125 those names whose forward lookup yields the correct IP address. Any other
7126 names are discarded. This closes a loophole whereby a rogue DNS
7127 administrator could create reverse DNS records to break through a
7128 wildcarded host restriction in an ACL.
7130 37. If a user filter or a system filter that ran in a subprocess used any of
7131 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7132 the wrong values were passed to the pipe command ($thisaddress had the
7133 value of $0, $0 had the value of $1, etc). This bug was introduced by
7134 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7136 38. Improved the line breaking for long SMTP error messages from ACLs.
7137 Previously, if there was no break point between 40 and 75 characters, Exim
7138 left the rest of the message alone. Two changes have been made: (a) I've
7139 reduced the minimum length to 35 characters; (b) if it can't find a break
7140 point between 35 and 75 characters, it looks ahead and uses the first one
7141 that it finds. This may give the occasional overlong line, but at least the
7142 remaining text gets split now.
7144 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7145 file descriptors might be low, and that setting 1000 would always raise it.
7146 It turns out that in some environments, the limit is already over 1000 and
7147 that lowering it causes trouble. So now Exim takes care not to decrease it.
7149 40. When delivering a message, the value of $return_path is set to $sender_
7150 address at the start of routing (routers may change the value). By an
7151 oversight, this default was not being set up when an address was tested by
7152 -bt or -bv, which affected the outcome if any router or filter referred to
7155 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7156 log only when "message" or "log_message" are set. However, if one of the
7157 conditions was an address verification, or a call to a nested ACL, the
7158 messages generated by the underlying test were being passed through. This
7159 no longer happens. The underlying message is available in $acl_verify_
7160 message for both "message" and "log_message" expansions, so it can be
7161 passed through if needed.
7163 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7164 new expansion $bh_ to give the encoded byte string without charset
7165 translation. Translation happens only if iconv() is available; HAVE_ICONV
7166 indicates this at build time. HEADERS_CHARSET gives the charset to
7167 translate to; headers_charset can change it in the configuration, and
7168 "headers charset" can change it in an individual filter file.
7170 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7171 that creates RFC 2047 encoded "words" labels them as that charset instead
7172 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7173 expansion operator; (ii) when Exim creates a From: line for a local
7174 message; (iii) when a header line is rewritten to include a "phrase" part.
7176 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7177 buggy, causing it to skip the first lines of messages whose message ID
7178 ended in 'D'. This would not have bitten before Exim release 4.14, because
7179 message IDs were unlikely to end in 'D' before then. The effect was to have
7180 incorrect size information for certain domains.
7182 45. #include "config.h" was missing at the start of the crypt16.c module. This
7183 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7186 46. If there was a timeout during a "random" callout check, Exim treated it as
7187 a failure of the random address, and carried on sending RSET and the real
7188 address. If the delay was just some slowness somewhere, the response to the
7189 original RCPT would be taken as a response to RSET and so on, causing
7190 mayhem of various kinds.
7192 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7193 when I implemented it. It didn't allow for the fact that some option values
7194 may legitimately be negative (e.g. size_addition), and it didn't even do
7195 the right test for positive values.
7197 48. Domain names in DNS records are case-independent. Exim always looks them up
7198 in lower case. Some resolvers return domain names in exactly the case they
7199 appear in the zone file, that is, they may contain uppercase letters. Not
7200 all resolvers do this - some return always lower case. Exim was treating a
7201 change of case by a resolver as a change of domain, similar to a widening
7202 of a domain abbreviation. This triggered its re-routing code and so it was
7203 trying to route what was effectively the same domain again. This normally
7204 caused routing to fail (because the router wouldn't handle the domain
7205 twice). Now Exim checks for this case specially, and just changes the
7206 casing of the domain that it ultimately uses when it transmits the message
7209 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7212 50. If a filter generated a file delivery with a non-absolute name (possible if
7213 no home directory exists for the router), the forbid_file option was not
7216 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7217 the existing equality matching.
7219 52. Exim was using ints instead of ino_t variables in some places where it was
7220 dealing with inode numbers.
7222 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7223 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7224 called TMPDIR, and if it finds it is different, it changes its value.
7226 54. The smtp_printf() function is now made available to local_scan() so
7227 additional output lines can be written before returning. There is also an
7228 smtp_fflush() function to enable the detection of a dropped connection.
7229 The variables smtp_input and smtp_batched_input are exported to
7232 55. Changed the default runtime configuration: the message "Unknown user"
7233 has been removed from the ACL, and instead placed on the localuser router,
7234 using the cannot_route_message feature. This means that any verification
7235 failures that generate their own messages won't get overridden. Similarly,
7236 the "Unrouteable address" message that was in the ACL for unverifiable
7237 relay addresses has also been removed.
7239 56. Added hosts_avoid_esmtp to the smtp transport.
7241 57. The exicyclog script was not checking for the esoteric option
7242 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7243 will work only if exicyclog is run under the appropriate euid.
7245 58. Following a discussion on the list, the rules by which Exim recognises line
7246 endings on incoming messages have been changed. The -dropcr and drop_cr
7247 options are now no-ops, retained only for backwards compatibility. The
7248 following line terminators are recognized: LF CRLF CR. However, special
7249 processing applies to CR:
7251 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7252 nor a local message in the state where . is a terminator.
7254 (ii) If a bare CR is encountered in a header line, an extra space is added
7255 after the line terminator so as not to end the header. The reasoning
7256 behind this is that bare CRs in header lines are most likely either
7257 to be mistakes, or people trying to play silly games.
7259 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7260 was being incorrectly given as 18 bytes larger than it should have been.
7261 This is a VOB (very old bug).
7263 60. This may never have affected anything current, but just in case it has:
7264 When the local host is found other than at the start of a list of hosts,
7265 the local host, those with the same MX, and any that follow, are discarded.
7266 When the list in question was part of a longer list of hosts, the following
7267 hosts (not currently being processed) were also being discarded. This no
7268 longer happens. I'm not sure if this situation could ever has previously
7271 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7274 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7275 header. This is something that is recommended in a new Internet Draft, and
7276 is something that is documented as being done by Sendmail. There are two
7277 possible values. For messages generated by the autoreply transport, Exim
7280 Auto-Submitted: auto-replied
7282 whereas for all other generated messages (e.g. bounces) it adds
7284 Auto-Submitted: auto-generated
7286 63. The "personal" condition in filters now includes a test for the
7287 Auto-Submitted: header. If it contains the string "auto-" the message it
7288 not considered personal.
7290 64. Added rcpt_include_affixes as a generic transport option.
7292 65. Added queue_only_override (default true).
7294 66. Added the syslog_duplication option.
7296 67. If what should have been the first header line of a message consisted of
7297 a space followed by a colon, Exim was mis-interpreting it as a header line.
7298 It isn't of course - it is syntactically invalid and should therefore be
7299 treated as the start of the message body. The misbehaviour could have
7300 caused a number of strange effects, including loss of data in subsequent
7301 header lines, and spool format errors.
7303 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7304 client host had authenticated. This control can now be exercised by an ACL
7305 for more flexibility.
7307 69. By default, callouts do not happen when testing with -bh. There is now a
7308 variant, -bhc, which does actually run the callout code, including
7309 consulting and updating the callout cache.
7311 70. Added support for saslauthd authentication, courtesy of Alexander
7314 71. If statvfs() failed on the spool or log directories while checking their
7315 size for availability, Exim confusingly gave the error "space shortage".
7316 Furthermore, in debugging mode it crashed with a floating point exception.
7317 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7318 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7319 serious problem, Exim now writes to the main and panic logs when this
7320 happens, with details of the failure. It then refuses to accept the
7321 incoming message, giving the message "spool directory problem" or "log
7322 directory problem" with a 421 code for SMTP messages.
7324 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7325 0, 1, and 2 exist, because some OS complain for execs without them (see
7326 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7327 descriptors. However, the code omitted to check that the open succeeded,
7328 causing mysterious errors if for some reason the permissions on /dev/null
7329 got screwed. Now Exim writes a message to the main and panic logs, and
7330 bombs out if it can't open /dev/null.
7332 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7333 interact so that it is all more flexible. It is supposed to remain
7334 backwards compatible. Also added extra_local_interfaces.
7336 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7337 to bomb out with an assertion failure - to the client this appears as a
7338 connection drop. This problem occurs in the part of the code that was taken
7339 from the Samba project. Fortunately, the assertion is in a very simple
7340 function, so I have fixed this by reproducing the function inline in the
7341 one place where it is called, and arranging for authentication to fail
7342 instead of killing the process with assert().
7344 75. The SPA client code was not working when the server requested OEM rather
7345 than Unicode encoding.
7347 76. Added code to make require_files with a specific uid setting more usable in
7348 the case where statting the file as root fails - usually a non-root-mounted
7349 NFS file system. When this happens and the failure is EACCES, Exim now
7350 forks a subprocess and does the per-uid checking as the relevant uid.
7352 77. Added process_log_path.
7354 78. If log_file_path was not explicitly set, a setting of check_log_space or
7355 check_log_inodes was ignored.
7357 79. If a space check for the spool or log partitions fails, the incident is now
7358 logged. Of course, in the latter case the data may get lost...
7360 80. Added the %p formatting code to string_format() so that it can be used to
7361 print addresses in debug_print(). Adjusted all the address printing in the
7362 debugging in store.c to use %p rather than %d.
7364 81. There was a concern that a line of code in smtp_in.c could overflow a
7365 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7366 initially expressed, the concern was not well-founded, because trailing
7367 spaces are removed early. However, if the trailing spaces were followed by
7368 a NULL, they did not get removed, so the overflow was possible. Two fixes
7371 (a) I re-wrote the offending code in a cleaner fashion.
7372 (b) If an incoming SMTP command contains a NULL character, it is rejected
7375 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7376 runs initgroups(), so that if the Exim user is in any additional groups,
7377 they will be used during message reception.
7383 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob