1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
10 HS/01 Handle trailing backslash gracefully. (CVE-2019-15846)
16 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917, OVE-20190718-0006)
22 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
23 buffer overrun for (non-chunking) other transports.
25 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
26 TLS1.3, means that a server rejecting a client certificate is not visible
27 to the client until the first read of encrypted data (typically the
28 response to EHLO). Add detection for that case and treat it as a failed
29 TLS connection attempt, so that the normal retry-in-clear can work (if
32 JB/01 BZg 2375: fix expansions of 822 addresses having comments in local-part
33 and/or domain. Found and fixed by Jason Betts.
39 JH/01 Remove code calling the customisable local_scan function, unless a new
40 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
42 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
43 non-signal-safe functions being used.
45 JH/03 Bug 2269: When presented with a received message having a stupidly large
46 number of DKIM-Signature headers, disable DKIM verification to avoid
47 a resource-consumption attack. The limit is set at twenty.
49 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
50 report of oldest_pass in ${authres } in consequence, and separate out
51 some descriptions of reasons for verification fail.
53 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
54 files in the spool were present and unlocked. A queue-runner could spot
55 them, resulting in a duplicate delivery. Fix that by doing the unlock
56 after the unlink. Investigation by Tim Stewart. Take the opportunity to
57 add more error-checking on spoolfile handling while that code is being
60 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
61 No known attacks, no CVE, this is defensive hardening.
63 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
64 a queue-runner could start a delivery while other operations were ongoing.
65 Cutthrough delivery was a common victim, resulting in duplicate delivery.
66 Found and investigated by Tim Stewart. Fix by using the open message data
67 file handle rather than opening another, and not locally closing it (which
68 releases a lock) for that case, while creating the temporary .eml format
69 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
71 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
72 $sender_verify_failure/$recipient_verify_failure to "random".
74 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
77 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
78 Previously this would segfault.
80 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
83 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
84 like zero, since the resolver should be doing this for us, But we need one
85 as a CNAME but no MX presence gets the CNAME returned; we need to check
86 that doesn't point to an MX to declare it "no MX returned" rather than
87 "error, loop". A new main option is added so the older capability of
88 following some limited number of chain links is maintained.
90 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
92 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
93 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
94 now-deprecated earlier definitions used only specified the range up to TLS
95 1.2 (in the older-version library docs).
97 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
99 JH/15 Rework TLS client-side context management. Stop using a global, and
100 explicitly pass a context around. This enables future use of TLS for
101 connections to service-daemons (eg. malware scanning) while a client smtp
102 connection is using TLS; with cutthrough connections this is quite likely.
104 JH/16 Fix ARC verification to do AS checks in reverse order.
106 JH/17 Support a "tls" option on the ${readsocket } expansion item.
108 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
109 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
110 Previously the "utf8" would be re-prepended for every additional message.
112 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
113 Previously thery were accepted, resulting in issues when attempting to
114 forward messages to a non-supporting MTA.
116 PP/02 Let -n work with printing macros too, not just options.
118 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
119 one parent address was copied, and bogus data was used at delivery-logging
120 time. Either a crash (after delivery) or bogus log data could result.
121 Discovery and analysis by Tim Stewart.
123 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
124 Previously if the string ended mid-character, we did not insert the
125 promised '?' replacement.
127 PP/04 Documentation: current string operators work on bytes, not codepoints.
129 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
130 should pack well giving a smaller memory footprint so better caching and
131 therefore performance. Group the declarations where this can't be done so
132 that the byte-sized flag variables are not interspersed among pointer
133 variables, giving a better chance of good packing by the compiler.
135 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
136 non-null, to avoid issues with sites running BATV. Previously reports were
137 sent with an empty envelope sender so looked like bounces.
139 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
140 The ignore_error flag wasn't being returned from the filter subprocess so
141 was not set for later routers. Investigation and fix by Matthias Kurz.
143 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
144 and a msg:complete for the whole, when a message is manually removed using
145 -Mrm. Developement by Matthias Kurz, hacked on by JH.
147 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
148 a "Gnu special" function, asprintf() in the DB utility binary builds; I
149 hope that is portable enough.
151 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
152 requiring a known-CA anchor certificate; make it now rely entirely on the
153 TLSA as an anchor. Checking the name on the leaf cert against the name
154 on the A-record for the host is still done for TA (but not for EE mode).
156 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
157 included in delivery lines for non-proxied connections, when compiled with
158 SUPPORT_SOCKS and running with proxy logging enabled.
160 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
161 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
162 move the existing event to fire before the normal logging of message
163 failure so that custom logging is bracketed by normal logging.
165 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
166 msg:fail:internal event. Developement by Matthias Kurz.
168 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
169 far too small for todays use of crypto signatures stored there. Go all
170 the way to the max DNS message size of 64kB, even though this might be
171 overmuch for IOT constrained device use.
173 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
174 copy a string over itself. The library routine is documented as not
175 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
177 JH/32 For main options check_spool_space and check_inode_space, where the
178 platform supports 64b integers, support more than the previous 2^31 kB
179 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
180 the previous G, M, k.
182 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
183 $authenticated_fail_id variable on authentication failure. Previously
186 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
187 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
188 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
189 GNUTLS_SEC_PARAM_MEDIUM.
191 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
192 side. Previously we would continue as if no SNI had been received.
194 JH/36 Harden the handling of string-lists. When a list consisted of a sole
195 "<" character, which should be a list-separator specification, we walked
196 off past the nul-terimation.
198 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
199 causes) even when the retry time is not yet met. Previously they were
200 not, meaning that when (say) an account was over-quota and temp-rejecting,
201 and multiple senders' messages were queued, only one sender would get
202 notified on each configured delay_warning cycle.
204 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
206 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
207 cipher-suites, an error can be left on the stack even for a succeeding
208 accept; this results in impossible error messages when a later operation
211 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
212 return error codes indicating retry. Under TLS1.3 this becomes required.
214 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
215 it only wrote the new authenticators, resulting in a lack of tracking of
216 peer changes of ESMTP extensions until the next cache flush.
218 JH/41 Fix the loop reading a message header line to check for integer overflow,
219 and more-often against header_maxsize. Previously a crafted message could
220 induce a crash of the recive process; now the message is cleanly rejected.
222 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
223 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
229 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
230 When redis_servers is set to a list of > 1 element, and the Redis servers
231 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
232 case of MOVED into a DEFER case instead, thus moving the query onto the
233 next server in the list. For a cluster of N elements, all N servers must
234 be defined in redis_servers.
236 GF/02 Catch and remove uninitialized value warning in exiqsumm
237 Check for existence of @ARGV before looking at $ARGV[0]
239 JH/01 Replace the store_release() internal interface with store_newblock(),
240 which internalises the check required to safely use the old one, plus
241 the allocate and data copy operations duplicated in both (!) of the
242 extant use locations.
244 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
245 modifier. This matches the restriction on the commandline.
247 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
248 Previously only the last row was returned.
250 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
251 we assumed that tags in the header were well-formed, and parsed the
252 element content after inspecting only the first char of the tag.
253 Assumptions at that stage could crash the receive process on malformed
256 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
257 While running the DKIM ACL we operate on the Permanent memory pool so that
258 variables created with "set" persist to the DATA ACL. Also (at any time)
259 DNS lookups that fail create cache records using the Permanent pool. But
260 expansions release any allocations made on the current pool - so a dnsdb
261 lookup expansion done in the DKIM ACL releases the memory used for the
262 DNS negative-cache, and bad things result. Solution is to switch to the
263 Main pool for expansions.
264 While we're in that code, add checks on the DNS cache during store_reset,
265 active in the testsuite.
266 Problem spotted, and debugging aided, by Wolfgang Breyha.
268 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
269 When none of the hosts presented to a transport match an already-open
270 connection, close it and proceed with the list. Previously we would
271 queue the message. Spotted by Lena with Yahoo, probably involving
274 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
275 Previously a spurious "250 OK id=" response was appended to the proper
278 JH/08 The "support for" informational output now, which built with Content
279 Scanning support, has a line for the malware scanner interfaces compiled
280 in. Interface can be individually included or not at build time.
282 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
283 by the template makefile "src/EDITME". The "STREAM" support for an older
284 ClamAV interface method is removed.
286 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
287 rows affected is given instead).
289 JH/11 The runtime Berkeley DB library version is now additionally output by
290 "exim -d -bV". Previously only the compile-time version was shown.
292 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
293 SMTP connection. Previously, when one had more receipients than the
294 first, an abortive onward connection was made. Move to full support for
295 multiple onward connections in sequence, handling cutthrough connection
296 for all multi-message initiating connections.
298 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
299 routers. Previously, a multi-recipient message would fail to match the
300 onward-connection opened for the first recipient, and cause its closure.
302 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
303 a timeout on read on a GnuTLS initiating connection, resulting in the
304 initiating connection being dropped. This mattered most when the callout
305 was marked defer_ok. Fix to keep the two timeout-detection methods
308 JH/15 Relax results from ACL control request to enable cutthrough, in
309 unsupported situations, from error to silently (except under debug)
310 ignoring. This covers use with PRDR, frozen messages, queue-only and
313 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
315 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
316 metadata, resulting in a crash in free().
318 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
319 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
320 Broken also in d185889f4, with init system revamp.
322 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
323 Previously we abruptly closed the connection after reading a malware-
324 found indication; now we go on to read the "scan ok" response line,
327 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
328 ACL. Previously, a crash would result.
330 JH/19 Speed up macro lookups during configuration file read, by skipping non-
331 macro text after a replacement (previously it was only once per line) and
332 by skipping builtin macros when searching for an uppercase lead character.
334 JH/20 DANE support moved from Experimental to mainline. The Makefile control
335 for the build is renamed.
337 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
338 was allocated for every new TLS startup, meaning one per message. Fix
339 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
341 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
342 reported the original. Fix to report (as far as possible) the ACL
343 result replacing the original.
345 JH/23 Fix memory leak during multi-message connections using STARTTLS under
346 OpenSSL. Certificate information is loaded for every new TLS startup,
347 and the resources needed to be freed.
349 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
351 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
354 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
355 DATA response info to the (existing) per-recipient response info for
356 the "C=" log element. It can have useful tracking info from the
357 destination system. Patch from Simon Arlott.
359 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
360 length value. Previously this would segfault.
362 HS/02 Support Avast multiline protoocol, this allows passing flags to
363 newer versions of the scanner.
365 JH/28 Ensure that variables possibly set during message acceptance are marked
366 dead before release of memory in the daemon loop. This stops complaints
367 about them when the debug_store option is enabled. Discovered specifically
368 for sender_rate_period, but applies to a whole set of variables.
369 Do the same for the queue-runner and queue-list loops, for variables set
370 from spool message files. Do the same for the SMTP per-message loop, for
371 certain variables indirectly set in ACL operations.
373 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
374 as a multi-recipient message from a mailinglist manager). The coding had
375 an arbitrary cutoff number of characters while checking for more input;
376 enforced by writing a NUL into the buffer. This corrupted long / fast
377 input. The problem was exposed more widely when more pipelineing of SMTP
378 responses was introduced, and one Exim system was feeding another.
379 The symptom is log complaints of SMTP syntax error (NUL chars) on the
380 receiving system, and refused recipients seen by the sending system
381 (propating to people being dropped from mailing lists).
382 Discovered and pinpointed by David Carter.
384 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
385 replaced by the ${authresults } expansion.
387 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
389 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
390 allows proper process termination in container environments.
392 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
393 Previously the "final dot" had a newline after it; ensure it is CR,LF.
395 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
396 and "err_perm", deprecated since 4.83 when the RFC-defined words
397 "temperror" and "permerror" were introduced.
399 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
400 transport-filters or DKIM-signing. The restriction was lost in the
401 consolidation of verify-callout and delivery SMTP handling.
402 Extend the restriction to also cover ARC-signing.
404 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
405 in defer=pass mode supply a 450 to the initiator. Previously the message
408 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
409 tls_require_ciphers is used as before.
411 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
412 "pass_unscanned". Only tmpfails from the scanner are written to
413 the paniclog, as they may require admin intervention (permission
414 denied, license issues). Other scanner errors (like decompression
415 bombs) do not cause a paniclog entry.
417 JH/36 Fix reinitialisation of DKIM logging variable between messages.
418 Previously it was possible to log spurious information in receive log
421 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
422 triggered odd behaviour from Outlook Express clients.
424 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
427 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
428 since the IETF WG has not yet settled on that versus the original
429 "bare" representation.
431 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
432 Previously the millisecond value corrupted the output.
433 Fix also for syslog_pid=no and log_selector +pid, for which the pid
434 corrupted the output.
440 JH/01 Rework error string handling in TLS interface so that the caller in
441 more cases is responsible for logging. This permits library-sourced
442 string to be attached to addresses during delivery, and collapses
443 pairs of long lines into single ones.
445 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
446 during configuration. Wildcards are allowed and expanded.
448 JH/02 Rework error string handling in DKIM to pass more info back to callers.
449 This permits better logging.
451 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
452 do not close it down and have the child transport start it up again on
453 the passed-on TCP connection. Instead, proxy the child (and any
454 subsequent ones) for TLS via a unix-domain socket channel. Logging is
455 affected: the continued delivery log lines do not have any DNSSEC, TLS
456 Certificate or OCSP information. TLS cipher information is still logged.
458 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
459 identical IP addresses on different listening ports. Will also affect
462 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
463 add noisy ifdef guards to special-case this sillyness.
464 Patch from Bernd Kuhls.
466 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
467 than 255 are no longer allowed.
469 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
470 Disable the session-cache too, which might reduce our load. Since we
471 currrectly use a new context for every connection, both as server and
472 client, there is no benefit for these.
473 GnuTLS appears to not support tickets server-side by default (we don't
474 call gnutls_session_ticket_enable_server()) but client side is enabled
475 by default on recent versions (3.1.3 +) unless the PFS priority string
478 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
479 <https://reproducible-builds.org/specs/source-date-epoch/>.
481 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
482 the check for any unsuccessful recipients did not notice the limit, and
483 erroneously found still-pending ones.
485 JH/08 Pipeline CHUNKING command and data together, on kernels that support
486 MSG_MORE. Only in-clear (not on TLS connections).
488 JH/09 Avoid using a temporary file during transport using dkim. Unless a
489 transport-filter is involved we can buffer the headers in memory for
490 creating the signature, and read the spool data file once for the
491 signature and again for transmission.
493 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
494 4.77 as the kernel support then wasn't solid, having issues in 64bit
495 mode. Now, it's been long enough. Add support for FreeBSD also.
497 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
498 case where the routing stage had gathered several addresses to send to
499 a host before calling the transport for the first, we previously failed
500 to close down TLS in the old transport process before passing the TCP
501 connection to the new process. The new one sent a STARTTLS command
502 which naturally failed, giving a failed delivery and bloating the retry
503 database. Investigation and fix prototype from Wolfgang Breyha.
505 JH/12 Fix check on SMTP command input synchronisation. Previously there were
506 false-negatives in the check that the sender had not preempted a response
507 or prompt from Exim (running as a server), due to that code's lack of
508 awareness of the SMTP input buffering.
510 PP/04 Add commandline_checks_require_admin option.
511 Exim drops privileges sanely, various checks such as -be aren't a
512 security problem, as long as you trust local users with access to their
513 own account. When invoked by services which pass untrusted data to
514 Exim, this might be an issue. Set this option in main configuration
515 AND make fixes to the calling application, such as using `--` to stop
518 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
519 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
520 responses to those, into a single TLS record each way (this usually means
521 a single packet). As a side issue, smtp_enforce_sync now works on TLS
524 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
525 affects you only if you're dancing at the edge of the param size limits.
526 If you are, and this message makes sense to you, then: raise the
527 configured limit or use OpenSSL 1.1. Nothing we can do for older
530 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
531 cmdline element to get the documented default one. Previously it was
534 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
535 are unsuable for non-message-specific reasons - eg. connection timeout,
536 banner-time rejection.
538 JH/16 Fix logging of delivery remote port, when specified by router, under
541 PP/06 Repair manualroute's ability to take options in any order, even if one
542 is the name of a transport.
545 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
547 JH/17 Change the list-building routines interface to use the expanding-string
548 triplet model, for better allocation and copying behaviour.
550 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
551 Previously it was constructed the first time a possibly-matching string
552 was met in the configuration file input during startup; now it is done
555 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
556 compatible one, to avoid the (poorly documented) possibility of a config
557 file in the working directory redirecting the DB files, possibly correpting
558 some existing file. CVE-2017-10140 assigned for BDB.
560 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
561 cache-hot. Previously, although the result was properly cached, the
562 initial verify call returned a defer.
564 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
565 the main verify for receipient in uncached-mode.
567 JH/22 Retire historical build files to an "unsupported" subdir. These are
568 defined as "ones for which we have no current evidence of testing".
570 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
571 if present. Previously it was ignored.
573 JH/24 Start using specified-initialisers in C structure init coding. This is
574 a C99 feature (it's 2017, so now considered safe).
576 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
577 if was a fixed-sized field and bitmask ops via macros; it is now more
580 PP/07 GitHub PR 56: Apply MariaDB build fix.
581 Patch provided by Jaroslav Škarvada.
583 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
584 during Coverity cleanups [4.87 JH/47]
585 Diagnosis and fix provided by Michael Fischer v. Mollard.
587 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
588 the right size to place the terminating semicolon on its own folded
589 line, the header hash was calculated to an incorrect value thanks to
590 the (relaxed) space the fold became.
592 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
593 and confused the parent.
595 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
596 which could crash as a result. This could lead to undeliverable messages.
598 JH/28 Logging: "next input sent too soon" now shows where input was truncated
601 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
602 matters on fast-turnover and PID-randomising systems, which were getting
603 out-of-order delivery.
605 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
606 a possibly-overlapping copy. The symptom was that "Remote host closed
607 connection in response to HELO" was logged instead of the actual 4xx
610 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
611 Previously only that bufferd was discarded, resulting in SYMTP command
614 JH/32 DKIM: when a message has multiple signatures matching an identity given
615 in dkim_verify_signers, run the dkim acl once for each. Previously only
616 one run was done. Bug 2189.
618 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
619 "panic the current process" to "deliberately defer". The panic log is
620 still written with the problem list name; the mail and reject logs now
621 get a temp-reject line for the message that was being handled, saying
622 something like "domains check lookup or other defer". The SMTP 451
623 message is still "Temporary local problem".
625 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
626 A crafted sequence of BDAT commands could result in in-use memory beeing
627 freed. CVE-2017-16943.
629 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
630 from SMTP input. Previously it was always done; now only done for DATA
631 and not BDAT commands. CVE-2017-16944.
633 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
634 to the message (such as an overlong header line). Previously this was
635 not done and we did not exit BDAT mode. Followon from the previous item
636 though a different problem.
642 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
643 than -2003 did; needs libidn2 in addition to libidn.
645 JH/02 The path option on a pipe transport is now expanded before use.
647 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
648 Patch provided by "Björn", documentation fix added too.
650 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
651 missing a wire-to-host endian conversion.
653 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
654 close after a BDAT command line could be taken as a following command,
655 giving a synch failure. Fix by only checking for synch immediately
656 before acknowledging the chunk.
658 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
659 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
660 macro. Patches provided by Josh Soref.
662 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
663 Previously we did not; the RFC seems ambiguous and VRFY is not listed
664 by IANA as a service extension. However, John Klensin suggests that we
667 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
668 the dkim code may be unix-mode line endings rather than smtp wire-format
669 CRLF, so prepend a CR to any bare LF.
671 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
672 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
674 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
675 the first were themselves being wrongly included in the feed into dkim
676 processing; with most chunk sizes in use this resulted in an incorrect
677 body hash calculated value.
679 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
680 DKIM signature block, for verification. Although advised against by
681 standards it is specifically not ruled illegal.
683 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
685 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
686 missing a body hash (the bh= tag).
688 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
689 It seems that HAProxy sends the Proxy Protocol information in clear and
690 only then does a TLS startup, so do the same.
692 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
693 TCP connections (such as for Spamd) unless the daemon successfully set
694 Fast Open mode on its listening sockets. This fixes breakage seen on
695 too-old kernels or those not configured for Fast Open, at the cost of
696 requiring both directions being enabled for TFO, and TFO never being used
697 by non-daemon-related Exim processes.
699 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
700 endings, at least on the first header line. Try to canonify any that get
701 past that check, despite the cost.
703 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
704 now limited to an arbitrary five deep, while parsing addresses with the
705 strip_excess_angle_brackets option enabled.
707 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
708 instead leave the unprompted TLS handshake in socket buffer for the
709 TLS library to consume.
711 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
713 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
715 JH/16 Drop variables when they go out of scope. Memory management drops a whole
716 region in one operation, for speed, and this leaves assigned pointers
717 dangling. Add checks run only under the testsuite which checks all
718 variables at a store-reset and panics on a dangling pointer; add code
719 explicitly nulling out all the variables discovered. Fixes one known
720 bug: a transport crash, where a dangling pointer for $sending_ip_address
721 originally assigned in a verify callout, is re-used.
723 PP/06 Drop '.' from @INC in various Perl scripts.
725 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
727 PP/08 Reduce a number of compilation warnings under clang; building with
728 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
729 should be warning-free.
731 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
733 HS/01 Fix portability problems introduced by PP/08 for platforms where
734 realloc(NULL) is not equivalent to malloc() [SunOS et al].
736 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
737 chunk. This allows us to accept broken chunked messages. We need a more
738 general solution here.
740 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
741 already-broken messages in the queue.
743 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
745 JH/19 Fix reference counting bug in routing-generated-address tracking.
751 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
752 supports it and a size is available (ie. the sending peer gave us one).
754 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
755 years of being deprecated). The replacements are the ACLs
756 acl_smtp_mime and acl_not_smtp_mime.
758 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
759 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
760 or even an in-clear connection were permitted. Now, if the host lookup
761 was dnssec and dane was requested then the host is only used if the
762 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
763 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
764 if one fails this test.
765 This means that a poorly-configured remote DNS will make it incommunicado;
766 but it protects against a DNS-interception attack on it.
768 JH/04 Bug 1810: make continued-use of an open smtp transport connection
769 non-noisy when a race steals the message being considered.
771 JH/05 If main configuration option tls_certificate is unset, generate a
772 self-signed certificate for inbound TLS connections.
774 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
775 in rewrites and routers.
777 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
778 and logged a warning sing 4.83; now they are a configuration file error.
780 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
781 (lacking @domain). Apply the same qualification processing as RCPT.
783 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
785 JH/10 Support ${sha256:} applied to a string (as well as the previous
788 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
789 a cutthrough deliver is pending, as we always want to make a connection.
790 This also avoids re-routing the message when later placing the cutthrough
791 connection after a verify cache hit.
792 Do not update it with the verify result either.
794 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
795 when routing results in more than one destination address.
797 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
798 signing (which inhibits the cutthrough capability). Previously only
799 the presence of an option was tested; now an expansion evaluating as
800 empty is permissible (obviously it should depend only on data available
801 when the cutthrough connection is made).
803 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
804 the relevant preceding SMTP command did not note the pipelining mode.
806 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
807 Previously they were not counted.
809 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
810 as one having no matching records. Previously we deferred the message
811 that needed the lookup.
813 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
814 distinguished as "(=".
816 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
817 for missing MX records. Previously it only worked for missing A records.
819 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
821 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
822 after the data-go-ahead and data-ack. Patch from Jason Betts.
824 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
825 even for a "none" policy. Patch from Tony Meyer.
827 JH/22 Fix continued use of a connection for further deliveries. If a port was
828 specified by a router, it must also match for the delivery to be
831 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
832 When one of the recipients of a message was unsuitable for the connection
833 (has no matching addresses), we lost track of needing to mark it
834 deferred. As a result mail would be lost.
836 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
838 JH/25 Decoding ACL controls is now done using a binary search; the source code
839 takes up less space and should be simpler to maintain. Merge the ACL
840 condition decode tables also, with similar effect.
842 JH/26 Fix problem with one_time used on a redirect router which returned the
843 parent address unchanged. A retry would see the parent address marked as
844 delivered, so not attempt the (identical) child. As a result mail would
847 JH/27 Fix a possible security hole, wherein a process operating with the Exim
848 UID can gain a root shell. Credit to http://www.halfdog.net/ for
849 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
852 JH/28 Enable {spool,log} filesystem space and inode checks as default.
853 Main config options check_{log,spool}_{inodes,space} are now
854 100 inodes, 10MB unless set otherwise in the configuration.
856 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
857 Previously it only applied to the main-section connection policy
860 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
862 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
863 by me. Added RFC7919 DH primes as an alternative.
865 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
866 are not in the system include path.
868 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
869 GnuTLS, when a session startup failed (eg because the client disconnected)
870 Exim did stdio operations after fclose. This was exposed by a recent
871 change which nulled out the file handle after the fclose.
873 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
874 signed directly by the cert-signing cert, rather than an intermediate
875 OCSP-signing cert. This is the model used by LetsEncrypt.
877 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
879 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
880 an incoming connection.
882 HS/02 Bug 1802: Do not half-close the connection after sending a request
885 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
886 fallback to "prime256v1".
888 JH/34 SECURITY: Use proper copy of DATA command in error message.
889 Could leak key material. Remotely exploitable. CVE-2016-9963.
895 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
896 and 3.4.4 - once the server is enabled to respond to an OCSP request
897 it does even when not requested, resulting in a stapling non-aware
898 client dropping the TLS connection.
900 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
901 support variable-length bit vectors. No functional change.
903 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
904 The I= interface field on outgoing lines is now after the H= remote
905 host field, same as incoming lines. There is a separate
906 outgoing_interface log selector which allows you to disable the
909 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
910 If not running log_selector +smtp_connection the mainlog would be held
911 open indefinitely after a "too many connections" event, including to a
912 deleted file after a log rotate. Leave the per net connection logging
913 leaving it open for efficiency as that will be quickly detected by the
914 check on the next write.
916 HS/01 Bug 1671: Fix post transport crash.
917 Processing the wait-<transport> messages could crash the delivery
918 process if the message IDs didn't exist for some reason. When
919 using 'split_spool_directory=yes' the construction of the spool
920 file name failed already, exposing the same netto behaviour.
922 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
923 mime_regex ACL conditions.
925 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
926 to DSN fail messages (bounces): remote IP, remote greeting, remote response
927 to HELO, local diagnostic string.
929 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
930 log line to debug. Even when configured with a tls authenticator many
931 client connections are expected to not authenticate in this way, so
932 an authenticate fail is not an error.
934 HS/02 Add the Exim version string to the process info. This way exiwhat
935 gives some more detail about the running daemon.
937 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
938 matter for fast-change records such as DNSBLs.
940 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
941 retry record, even if constant. There may be multiple transports with
942 different interface settings and the retry behaviour needs to be kept
945 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
947 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
949 JH/10 Bug 840: fix log_defer_output option of pipe transport
951 JH/11 Bug 830: use same host for all RCPTS of a message, even under
952 hosts_randomize. This matters a lot when combined with mua_wrapper.
954 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
955 ${quote_pgsql:<string>} operator.
957 JH/13 Bug 1708: avoid misaligned access in cached lookup.
959 JH/14 Change header file name for freeradius-client. Relevant if compiling
960 with Radius support; from the Gentoo tree and checked under Fedora.
962 JH/15 Bug 1712: Introduce $prdr_requested flag variable
964 JH/16 Bug 1714: Permit an empty string as expansion result for transport
965 option transport_filter, meaning no filtering.
967 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
969 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
970 defaults to "*" (all hosts). The variable is now available when not built
971 with TLS, default unset, mainly to enable keeping the testsuite sane.
972 If a server certificate is not supplied (via tls_certificate) an error is
973 logged, and clients will find TLS connections fail on startup. Presumably
974 they will retry in-clear.
975 Packagers of Exim are strongly encouraged to create a server certificate
976 at installation time.
978 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
979 with the $config_file variable.
981 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
982 in transport context, after the attempt, and per-recipient. The latter type
983 is per host attempted. The event data is the error message, and the errno
984 information encodes the lookup type (A vs. MX) used for the (first) host,
985 and the trailing two digits of the smtp 4xx response.
987 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
988 to write to mainlog (or rejectlog, paniclog) in the window between file
989 creation and permissions/ownership being changed. Particularly affects
990 installations where exicyclog is run as root, rather than exim user;
991 result is that the running daemon panics and dies.
993 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
995 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
996 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
997 "pri" and "weight". Note that the previous implicit priority given by the
998 list order is no longer honoured.
1000 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1001 for DKIM processing.
1003 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1004 by defining SUPPORT_SOCKS.
1006 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1007 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1008 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1009 variables are renamed to proxy_{local,external}_{address,port}.
1011 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1012 for a build by defining SUPPORT_I18N
1014 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1015 of the query string, and make ${quote_redis:} do that quoting.
1017 JH/29 Move Events support from Experimental to mainline, enabled by default
1018 and removable for a build by defining DISABLE_EVENT.
1020 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1022 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1023 cached by the daemon.
1025 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1026 by defining LOOKUP_REDIS. The libhiredis library is required.
1028 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1029 keys are given for lookup.
1031 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1032 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1033 only supported when built with TLS support. The PolarSSL SHA routines
1034 are still used when the TLS library is too old for convenient support.
1036 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1037 openssl_options), for security. OpenSSL forces this from version 1.1.0
1038 server-side so match that on older versions.
1040 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1041 allocation for $value could be released as the expansion processing
1042 concluded, but leaving the global pointer active for it.
1044 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1045 and to use the domains and local_parts ACL conditions.
1047 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1048 incorrectly not doubled on cutthrough transmission, hence seen as a
1049 body-termination at the receiving system - resulting in truncated mails.
1050 Commonly the sender saw a TCP-level error, and retransmitted the message
1051 via the normal store-and-forward channel. This could result in duplicates
1052 received - but deduplicating mailstores were liable to retain only the
1053 initial truncated version.
1055 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1057 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1059 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1060 we're in there, support oversigning also; bug 1309.
1062 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1064 HS/04 Add support for keep_environment and add_environment options.
1066 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1067 either intentional arithmetic overflow during PRNG, or testing config-
1070 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1071 delivery resulted in actual delivery. Cancel cutthrough before DATA
1074 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1075 rejects a recipient: pass the reject to the originator.
1077 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1078 Many were false-positives and ignorable, but it's worth fixing the
1081 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1082 for the new environment-manipulation done at startup. Move the routines
1083 from being local to tls.c to being global via the os.c file.
1085 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1086 an extract embedded as result-arg for a map, the first arg for extract
1087 is unavailable so we cannot tell if this is a numbered or keyed
1088 extraction. Accept either.
1094 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1097 JH/02 The smtp transport option "multi_domain" is now expanded.
1099 JH/03 The smtp transport now requests PRDR by default, if the server offers
1102 JH/04 Certificate name checking on server certificates, when exim is a client,
1103 is now done by default. The transport option tls_verify_cert_hostnames
1104 can be used to disable this per-host. The build option
1105 EXPERIMENTAL_CERTNAMES is withdrawn.
1107 JH/05 The value of the tls_verify_certificates smtp transport and main options
1108 default to the word "system" to access the system default CA bundle.
1109 For GnuTLS, only version 3.0.20 or later.
1111 JH/06 Verification of the server certificate for a TLS connection is now tried
1112 (but not required) by default. The verification status is now logged by
1113 default, for both outbound TLS and client-certificate supplying inbound
1116 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1119 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1120 Status Notification (bounce) messages are now MIME format per RFC 3464.
1121 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1122 under the control of the dsn_advertise_hosts option, and routers may
1123 have a dsn_lasthop option.
1125 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1126 default, modifiable by a malware= option. The list separator for
1127 the options can now be changed in the usual way. Bug 68.
1129 JH/10 The smtp_receive_timeout main option is now expanded before use.
1131 JH/11 The incoming_interface log option now also enables logging of the
1132 local interface on delivery outgoing connections.
1134 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1135 if the interface and destination host and port all match.
1137 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1140 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1141 Patch from Andrew Lewis.
1143 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1144 now supports optional time-restrictions, weighting, and priority
1145 modifiers per server. Patch originally by <rommer@active.by>.
1147 JH/16 The spamd_address main option now supports a mixed list of local
1148 and remote servers. Remote servers can be IPv6 addresses, and
1149 specify a port-range.
1151 JH/17 Bug 68: The spamd_address main option now supports an optional
1152 timeout value per server.
1154 JH/18 Bug 1581: Router and transport options headers_add/remove can
1155 now have the list separator specified.
1157 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1160 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1163 JH/21 Support for the A6 type of dns record is withdrawn.
1165 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1166 rather than the verbs used.
1168 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1169 from 255 to 1024 chars.
1171 JH/24 Verification callouts now attempt to use TLS by default.
1173 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1174 are generic router options now. The defaults didn't change.
1176 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1177 Original patch from Alexander Shikoff, worked over by JH.
1179 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1180 files if ZCAT_COMMAND is not executable.
1182 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1184 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1186 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1187 Normally benign, it bites when the pair was led to by a CNAME;
1188 modern usage is to not canonicalize the domain to a CNAME target
1189 (and we were inconsistent anyway for A-only vs AAAA+A).
1191 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1193 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1194 when evaluating $sender_host_dnssec.
1196 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1197 $sender_helo_dnssec variable.
1199 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1201 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1203 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1205 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1206 documented as working, but never had. Support all but $spam_report.
1208 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1209 added for tls authenticator.
1211 HS/03 Add perl_taintmode main config option
1217 TL/01 When running the test suite, the README says that variables such as
1218 no_msglog_check are global and can be placed anywhere in a specific
1219 test's script, however it was observed that placement needed to be near
1220 the beginning for it to behave that way. Changed the runtest perl
1221 script to read through the entire script once to detect and set these
1222 variables, reset to the beginning of the script, and then run through
1223 the script parsing/test process like normal.
1225 TL/02 The BSD's have an arc4random API. One of the functions to induce
1226 adding randomness was arc4random_stir(), but it has been removed in
1227 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1228 function when detected.
1230 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1231 cause callback expansion.
1233 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1234 syntax errors in an expansion can be treated as a string instead of
1235 logging or causing an error, due to the internal use of bool_lax
1236 instead of bool when processing it.
1238 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1239 server certificates when making smtp deliveries.
1241 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1243 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1245 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1247 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1248 Merged patch from Sebastian Wiedenroth.
1250 JH/05 Fix results-pipe from transport process. Several recipients, combined
1251 with certificate use, exposed issues where response data items split
1252 over buffer boundaries were not parsed properly. This eventually
1253 resulted in duplicates being sent. This issue only became common enough
1254 to notice due to the introduction of connection certificate information,
1255 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1257 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1258 size buffer was used, resulting in syntax errors when an expansion
1261 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1262 version 3.3.6 or later.
1264 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1265 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1266 both become "event_action", the variables become $event_name, $event_data
1267 and $event_defer_errno. There is a new variable $verify_mode, usable in
1268 routers, transports and related events. The tls:cert event is now also
1269 raised for inbound connections, if the main configuration event_action
1272 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1273 early OCSP support, but no stapling (appears to be less than 1.0.0).
1275 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1276 server certificate names available under the smtp transport option
1277 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1280 JH/10 Time-related extraction expansions from certificates now use the main
1281 option "timezone" setting for output formatting, and are consistent
1282 between OpenSSL and GnuTLS compilations. Bug 1541.
1284 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1285 encoded parameter in the incoming message. Bug 1558.
1287 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1288 include certificate info, eximon was claiming there were spoolfile
1291 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1293 JH/14 Log delivery-related information more consistently, using the sequence
1294 "H=<name> [<ip>]" wherever possible.
1296 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1297 are problematic for Debian distribution, omit them from the release
1300 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1302 JH/16 Fix string representation of time values on 64bit time_t architectures.
1305 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1306 output list separator was used.
1311 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1312 checkers that were complaining about end of non-void function with no
1315 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1316 This was a regression introduced in 4.83 by another bugfix.
1318 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1320 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1321 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1327 TF/01 Correctly close the server side of TLS when forking for delivery.
1329 When a message was received over SMTP with TLS, Exim failed to clear up
1330 the incoming connection properly after forking off the child process to
1331 deliver the message. In some situations the subsequent outgoing
1332 delivery connection happened to have the same fd number as the incoming
1333 connection previously had. Exim would try to use TLS and fail, logging
1334 a "Bad file descriptor" error.
1336 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1337 utilities have not been installed.
1339 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1340 temporary space as the ACL may create new global variables.
1342 TL/01 LDAP support uses per connection or global context settings, depending
1343 upon the detected version of the libraries at build time.
1345 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1346 to extract and use the src ip:port in logging and expansions as if it
1347 were a direct connection from the outside internet. PPv2 support was
1348 updated based on HAProxy spec change in May 2014.
1350 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1352 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1353 Properly escape header and check for NULL return.
1355 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1358 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1360 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1361 characters in header names, implemented as a verify condition.
1362 Contributed by Michael Fischer v. Mollard.
1364 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1365 results permerror and temperror. Previous values are deprecated but
1366 still accepted. In a future release, err_perm and err_temp will be
1367 completely removed, which will be a backward incompatibility if the
1368 ACL tests for either of these two old results. Patch contributed by
1369 user bes-internal on the mailing list.
1371 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1373 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1374 selectors, in both main and reject logs.
1376 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1379 JH/07 Add malware type "sock" for talking to simple daemon.
1381 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1383 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1384 routers/transports under cutthrough routing.
1386 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1387 numbers. Touch up "bool" conditional to keep the same definition.
1389 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1391 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1393 JH/12 Expand items in router/transport headers_add or headers_remove lists
1394 individually rather than the list as a whole. Bug 1452.
1396 Required for reasonable handling of multiple headers_ options when
1397 they may be empty; requires that headers_remove items with embedded
1398 colons must have them doubled (or the list-separator changed).
1400 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1401 view the policy declared in the DMARC record. Currently, $dmarc_status
1402 is a combined value of both the record presence and the result of the
1405 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1407 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1408 dnslookup router and the smtp transport (applying to the forward
1411 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1412 of ldap servers used for a specific lookup. Patch provided by Heiko
1415 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1416 New variable $lookup_dnssec_authenticated for observability.
1418 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1419 Patch submitted by Lars Timman.
1421 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1423 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1424 Requires trusted mode and valid format message id, aborts otherwise.
1425 Patch contributed by Heiko Schlichting.
1427 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1428 certextract with support for various fields. Bug 1358.
1430 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1431 is requested by default, modifiable by smtp transport option
1434 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1435 operate on certificate variables to give certificate fingerprints
1436 Also new ${sha256:cert_variable}.
1438 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1440 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1441 Christian Aistleitner.
1443 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1445 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1446 file. Patch from Wolfgang Breyha.
1448 JH/25 Expand the coverage of the delivery $host and $host_address to
1449 client authenticators run in verify callout. Bug 1476.
1451 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1452 align with daemon_smtp_ports. Bug 72.
1454 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1455 support and error reporting did not work properly.
1457 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1458 and is readable. Patch from Andrew Colin Kissa.
1460 TL/14 Enhance documentation of ${run expansion and how it parses the
1461 commandline after expansion, particularly in the case when an
1462 unquoted variable expansion results in an empty value.
1464 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1466 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1467 by renaming away from it. Addresses GH issue 15, reported by
1470 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1472 TL/15 SECURITY: prevent double expansion in math comparison functions
1473 (can expand unsanitized data). Not remotely exploitable.
1480 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1482 PP/02 Make -n do something, by making it not do something.
1483 When combined with -bP, the name of an option is not output.
1485 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1488 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1489 $sender_host_name and config options to manage this, and basic check
1492 PP/05 DSCP support for outbound connections and control modifier for inbound.
1494 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1495 (Only plugin which currently uses this is kerberos4, which nobody should
1496 be using, but we should make it available and other future plugins might
1497 conceivably use it, even though it would break NAT; stuff *should* be
1498 using channel bindings instead).
1500 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1501 name; added for Sendmail compatibility; requires admin caller.
1502 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1503 just ignore it); requires trusted caller.
1504 Also parse but ignore: -Ac -Am -X<logfile>
1507 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1509 TL/02 Add +smtp_confirmation as a default logging option.
1511 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1512 Patch by Magnus Holmgren from 2007-02-20.
1514 TL/04 Bugzilla 1281 - Spec typo.
1515 Bugzilla 1283 - Spec typo.
1516 Bugzilla 1290 - Spec grammar fixes.
1518 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1520 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1522 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1523 mailing list by by Dmitry Isaikin.
1525 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1527 JH/02 Support "G" suffix to numbers in ${if comparisons.
1529 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1531 NM/01 Bugzilla 1197 - Spec typo
1532 Bugzilla 1196 - Spec examples corrections
1534 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1536 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1537 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1540 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1541 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1543 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1544 "acl {{name}{arg}...}", and optional args on acl condition
1547 JH/05 Permit multiple router/transport headers_add/remove lines.
1549 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1551 JH/07 Avoid using a waiting database for a single-message-only transport.
1552 Performance patch from Paul Fisher. Bugzilla 1262.
1554 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1557 JH/09 Add $headers_added variable, with content from use of ACL modifier
1558 add_header (but not yet added to the message). Bugzilla 199.
1560 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1561 Pulled from Bugzilla 817 by Wolfgang Breyha.
1563 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1565 (nb: this is the same fix as in Exim 4.80.1)
1567 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1570 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1573 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1575 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1576 advertise SMTP AUTH mechanism to us, instead of a generic
1577 protocol violation error. Also, make Exim more robust to bad
1578 data from the Dovecot auth socket.
1580 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1582 When a queue runner is handling a message, Exim first routes the
1583 recipient addresses, during which it prunes them based on the retry
1584 hints database. After that it attempts to deliver the message to
1585 any remaining recipients. It then updates the hints database using
1588 So if a recipient address works intermittently, it can get repeatedly
1589 deferred at routing time. The retry hints record remains fresh so the
1590 address never reaches the final cutoff time.
1592 This is a fairly common occurrence when a user is bumping up against
1593 their storage quota. Exim had some logic in its local delivery code
1594 to deal with this. However it did not apply to per-recipient defers
1595 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1597 This change adds a proper retry rule check during routing so that the
1598 final cutoff time is checked against the message's age. We only do
1599 this check if there is an address retry record and there is not a
1600 domain retry record; this implies that previous attempts to handle
1601 the address had the retry_use_local_parts option turned on. We use
1602 this as an approximation for the destination being like a local
1603 delivery, as in LMTP.
1605 I suspect this new check makes the old local delivery cutoff check
1606 redundant, but I have not verified this so I left the code in place.
1608 TF/02 Correct gecos expansion when From: is a prefix of the username.
1610 Test 0254 submits a message to Exim with the header
1614 When I ran the test suite under the user fanf2, Exim expanded
1615 the header to contain my full name, whereas it should have added
1616 a Resent-Sender: header. It erroneously treats any prefix of the
1617 username as equal to the username.
1619 This change corrects that bug.
1621 GF/01 DCC debug and logging tidyup
1622 Error conditions log to paniclog rather than rejectlog.
1623 Debug lines prefixed by "DCC: " to remove any ambiguity.
1625 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1627 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1628 Bug spotted by Jeremy Harris; was flawed since initial commit.
1629 Would have resulted in OCSP responses post-SNI triggering an Exim
1630 NULL dereference and crash.
1632 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1634 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1635 Bug detection, analysis and fix by Samuel Thibault.
1636 Bugzilla 1331, Debian bug #698092.
1638 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1640 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1641 Server implementation by Todd Lyons, client by JH.
1642 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1643 config variable "prdr_enable" controls whether the server
1644 advertises the facility. If the client requests PRDR a new
1645 acl_data_smtp_prdr ACL is called once for each recipient, after
1646 the body content is received and before the acl_smtp_data ACL.
1647 The client is controlled by both of: a hosts_try_prdr option
1648 on the smtp transport, and the server advertisement.
1649 Default client logging of deliveries and rejections involving
1650 PRDR are flagged with the string "PRDR".
1652 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1653 fclose(). Diagnosis by Todd Lyons.
1655 PP/17 Update configure.default to handle IPv6 localhost better.
1656 Patch by Alain Williams (plus minor tweaks).
1659 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1660 This is now consistent with GnuTLS, and is now documented: the
1661 previous undocumented portable approach to treating the option as
1662 unset was to force an expansion failure. That still works, and
1663 an empty string is now equivalent.
1665 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1666 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1667 not performing validation itself.
1669 PP/20 Added force_command boolean option to pipe transport.
1670 Patch from Nick Koston, of cPanel Inc.
1672 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1675 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1677 PP/21 Fix eximon continuous updating with timestamped log-files.
1678 Broken in a format-string cleanup in 4.80, missed when I repaired the
1679 other false fix of the same issue.
1680 Report and fix from Heiko Schlichting.
1683 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1684 Report from Prashanth Katuri.
1686 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1687 It's SecureTransport, so affects any MacOS clients which use the
1688 system-integrated TLS libraries, including email clients.
1690 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1691 using a MIME ACL for non-SMTP local injection.
1692 Report and assistance in diagnosis by Warren Baker.
1694 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1696 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1698 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1699 last id that failed so it may be referenced in subsequent ACL's.
1701 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1704 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1705 ldap library initialization, allowing self-signed CA's to be
1706 used. Also properly sets require_cert option later in code by
1707 using NULL (global ldap config) instead of ldap handle (per
1708 session). Bug diagnosis and testing by alxgomz.
1710 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1711 the src/util/ subdirectory.
1713 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1714 renamed to Transport Post Delivery Action by Jeremy Harris, as
1717 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1718 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1719 redis_servers = needs to be configured which will be used by the redis
1720 lookup. Patch from Warren Baker, of The Packet Hub.
1722 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1724 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1725 hostname or reverse DNS when processing a host list. Used suggestions
1726 from multiple comments on this bug.
1728 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1730 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1731 Missed a few lines, added it to make the runtest require no keyboard
1734 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1735 contains upper case chars. Make router use caseful_local_part.
1737 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1738 support when GnuTLS has been built with p11-kit.
1744 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1746 This, or similar/improved, will also be change PP/11 of 4.82.
1752 PP/01 Handle short writes when writing local log-files.
1753 In practice, only affects FreeBSD (8 onwards).
1754 Bugzilla 1053, with thanks to Dmitry Isaikin.
1756 NM/01 Bugzilla 949 - Documentation tweak
1758 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1761 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1763 PP/02 Implemented gsasl authenticator.
1765 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1767 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1768 `pkg-config foo` for cflags/libs.
1770 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1771 with rest of GSASL and with heimdal_gssapi.
1773 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1774 `pkg-config foo` for cflags/libs for the TLS implementation.
1776 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1777 properties get this fed in as external SSF. A number of robustness
1778 and debugging improvements to the cyrus_sasl authenticator.
1780 PP/08 cyrus_sasl server now expands the server_realm option.
1782 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1783 Patch by Jeremy Harris.
1785 PP/10 Added dbmjz lookup type.
1787 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1789 PP/12 MAIL args handles TAB as well as SP, for better interop with
1790 non-compliant senders.
1791 Analysis and variant patch by Todd Lyons.
1793 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1794 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1795 Patch from Dirk Mueller <dmueller@suse.com>
1797 PP/13 tls_peerdn now print-escaped for spool files.
1798 Observed some $tls_peerdn in wild which contained \n, which resulted
1799 in spool file corruption.
1801 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1802 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1803 or write after TLS renegotiation, which otherwise led to messages
1806 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1807 as a tracking header (ie: a signed header comes before the signature).
1808 Patch from Wolfgang Breyha.
1810 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1811 comma-sep list; embedded commas doubled.
1813 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1815 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1817 Report and patch from Dmitry Banschikov.
1819 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1820 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1821 failures. We appear to now support TLS1.1+ with Exim.
1823 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1824 lets Exim select keys and certificates based upon TLS SNI from client.
1825 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1826 before an outbound SMTP session. New log_selector, +tls_sni.
1828 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1829 NULL dereference. Report and patch from Alun Jones.
1831 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1832 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1833 Not seeing resolver debug output on NetBSD, but suspect this is a
1834 resolver implementation change.
1836 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1837 Left warnings. Added "eximon gdb" invocation mode.
1839 PP/21 Defaulting "accept_8bitmime" to true, not false.
1841 PP/22 Added -bw for inetd wait mode support.
1843 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1844 locate the relevant includes and libraries. Made this the default.
1846 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1847 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1849 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1850 This may cause build issues on older platforms.
1852 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1853 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1854 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1855 Added SNI support via GnuTLS too.
1856 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1858 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1860 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1861 Applied second patch from Janne, implementing suggestion to default
1862 multiple-strings-in-record handling to match SPF spec.
1864 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1866 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1867 read-only, out of scope).
1868 Patch from Wolfgang Breyha, report from Stuart Northfield.
1870 PP/29 Fix three issues highlighted by clang analyser static analysis.
1871 Only crash-plausible issue would require the Cambridge-specific
1872 iplookup router and a misconfiguration.
1873 Report from Marcin Mirosław.
1875 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1877 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1878 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1879 As part of this, removing so much warning spew let me fix some minor
1880 real issues in debug logging.
1882 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1883 assignment on my part. Fixed.
1885 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1886 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1887 Janne Snabb (who went above and beyond: thank you).
1889 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1890 string otherwise requires a connection and a bunch more work and it's
1891 relatively easy to get wrong. Should also expose TLS library linkage
1894 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1895 64-bit ${eval} (JH/03).
1897 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1898 GNU libc to support some of the 64-bit stuff, should not lead to
1899 conflicts. Defined before os.h is pulled in, so if a given platform
1900 needs to override this, it can.
1902 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1903 protection layer was required, which is not implemented.
1904 Bugzilla 1254, patch from Wolfgang Breyha.
1906 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1907 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1908 tls_dhparam take prime identifiers. Also unbreak combination of
1909 OpenSSL+DH_params+TLSSNI.
1911 PP/39 Disable SSLv2 by default in OpenSSL support.
1917 PP/01 Solaris build fix for Oracle's LDAP libraries.
1918 Bugzilla 1109, patch from Stephen Usher.
1920 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1922 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1925 TF/02 Fix a couple more cases where we did not log the error message
1926 when unlink() failed. See also change 4.74-TF/03.
1928 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1929 lock up or crash if it happened to be inside a call to libc when it
1930 got a SIGUSR1 from exiwhat.
1932 The SIGUSR1 handler appends the current process status to the process
1933 log which is later printed by exiwhat. It used to use the general
1934 purpose logging code to do this, but several functions it calls are
1935 not safe for signals.
1937 The new output code in the SIGUSR1 handler is specific to the process
1938 log, and simple enough that it's easy to inspect for signal safety.
1939 Removing some special cases also simplifies the general logging code.
1940 Removing the spurious timestamps from the process log simplifies
1943 TF/04 Improved ratelimit ACL condition.
1945 The /noupdate option has been deprecated in favour of /readonly which
1946 has clearer semantics. The /leaky, /strict, and /readonly update modes
1947 are mutually exclusive. The update mode is no longer included in the
1948 database key; it just determines when the database is updated. (This
1949 means that when you upgrade Exim will forget old rate measurements.)
1951 Exim now checks that the per_* options are used with an update mode that
1952 makes sense for the current ACL. For example, when Exim is processing a
1953 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1954 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1955 must specify per_mail/readonly. If you omit the update mode it defaults to
1956 /leaky where that makes sense (as before) or /readonly where required.
1958 The /noupdate option is now undocumented but still supported for
1959 backwards compatibility. It is equivalent to /readonly except that in
1960 ACLs where /readonly is required you may specify /leaky/noupdate or
1961 /strict/noupdate which are treated the same as /readonly.
1963 A useful new feature is the /count= option. This is a generalization
1964 of the per_byte option, so that you can measure the throughput of other
1965 aggregate values. For example, the per_byte option is now equivalent
1966 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1968 The per_rcpt option has been generalized using the /count= mechanism
1969 (though it's more complicated than the per_byte equivalence). When it is
1970 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1971 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1972 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1973 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1974 Note that using per_rcpt with a non-readonly update mode in more than
1975 one ACL will cause the recipients to be double-counted. (The per_mail
1976 and per_byte options don't have this problem.)
1978 The handling of very low rates has changed slightly. If the computed rate
1979 is less than the event's count (usually one) then this event is the first
1980 after a long gap. In this case the rate is set to the same as this event's
1981 count, so that the first message of a spam run is counted properly.
1983 The major new feature is a mechanism for counting the rate of unique
1984 events. The new per_addr option counts the number of different
1985 recipients that someone has sent messages to in the last time period. It
1986 behaves like per_rcpt if all the recipient addresses are different, but
1987 duplicate recipient addresses do not increase the measured rate. Like
1988 the /count= option this is a general mechanism, so the per_addr option
1989 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1990 example, measure the rate that a client uses different sender addresses
1991 with the options per_mail/unique=$sender_address. There are further
1992 details in the main documentation.
1994 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1996 TF/06 Removed a few PCRE remnants.
1998 TF/07 Automatically extract Exim's version number from tags in the git
1999 repository when doing development or release builds.
2001 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2002 Bugzilla 879. Patch from Paul Fisher.
2004 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2005 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2008 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2010 PP/05 Variable $av_failed, true if the AV scanner deferred.
2011 Bugzilla 1078. Patch from John Horne.
2013 PP/06 Stop make process more reliably on build failure.
2014 Bugzilla 1087. Patch from Heiko Schlittermann.
2016 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2017 Bugzilla 1089. Patch from Heiko Schlittermann.
2019 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2020 Bugzilla 1131. Patch from Holger Weiß.
2022 PP/09 Handle IPv6 addresses with SPF.
2023 Bugzilla 860. Patch from Wolfgang Breyha.
2025 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2027 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2030 PP/11 match_* no longer expand right-hand-side by default.
2031 New compile-time build option, EXPAND_LISTMATCH_RHS.
2032 New expansion conditions, "inlist", "inlisti".
2034 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2036 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2038 PP/14 fix log_write() format string regression from TF/03.
2039 Bugzilla 1152. Patch from Dmitry Isaikin.
2045 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2047 PP/02 Harmonised TLS library version reporting; only show if debugging.
2048 Layout now matches that introduced for other libraries in 4.74 PP/03.
2050 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2052 PP/04 New "dns_use_edns0" global option.
2054 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2057 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2058 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2060 TK/01 Updated PolarSSL code to 0.14.2.
2061 Bugzilla 1097. Patch from Andreas Metzler.
2063 PP/07 Catch divide-by-zero in ${eval:...}.
2064 Fixes bugzilla 1102.
2066 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2069 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2070 format-string attack -- SECURITY: remote arbitrary code execution.
2072 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2073 time unintentionally subject to list matching rules, letting the header
2074 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2075 arbitrary string expansion). This allowed for information disclosure.
2077 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2078 INT_MIN/-1 -- value coerced to INT_MAX.
2084 NM/01 Workaround for PCRE version dependency in version reporting
2087 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2088 This fixes portability to compilers other than gcc, notably
2089 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2091 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2092 makefiles for portability to HP-UX and POSIX correctness.
2094 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2095 Also via indented variable definition in the Makefile.
2096 (Debugging by Oliver Heesakkers).
2098 PP/02 Restore caching of spamd results with expanded spamd_address.
2099 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2101 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2102 Improves build reliability. Fix from: Frank Elsner
2104 NM/02 Fix wide character breakage in the rfc2047 coding
2105 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2107 NM/03 Allow underscore in dnslist lookups
2108 Fixes bug 1026. Patch from Graeme Fowler
2110 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2111 Code patches from Adam Ciarcinski of NetBSD.
2113 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2116 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2117 is logged, to avoid truncation. Patch from John Horne.
2119 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2120 Patch from Jakob Hirsch.
2122 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2123 SQL string expansion failure details.
2124 Patch from Andrey Oktyabrski.
2126 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2127 Patch from Simon Arlott.
2129 PP/09 New lookups functionality failed to compile on old gcc which rejects
2130 extern declarations in function scope.
2131 Patch from Oliver Fleischmann
2133 PP/10 Use sig_atomic_t for flags set from signal handlers.
2134 Check getgroups() return and improve debugging.
2135 Fixed developed for diagnosis in bug 927 (which turned out to be
2138 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2139 Patch from Mark Zealey.
2141 PP/12 Bugzilla 1056: Improved spamd server selection.
2142 Patch from Mark Zealey.
2144 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2145 Based on patch from Heiko Schlittermann.
2147 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2148 Patch from Uwe Doering, sign-off by Michael Haardt.
2150 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2151 variable declaration deep within a block. Bug and patch from
2154 PP/15 lookups-Makefile IRIX compatibility coercion.
2156 PP/16 Make DISABLE_DKIM build knob functional.
2158 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2159 Patch by Simon Arlott
2161 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2162 variable argument macros. Our copy now differs from upstream.
2168 TF/01 Failure to get a lock on a hints database can have serious
2169 consequences so log it to the panic log.
2171 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2172 controlled using the smtp_confirmation log selector.
2174 TF/03 Include the error message when we fail to unlink a spool file.
2176 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2177 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2178 for maintaining out-of-tree patches for some time.
2180 PP/01 Bugzilla 139: Documentation and portability issues.
2181 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2182 Handle per-OS dynamic-module compilation flags.
2184 PP/02 Let /dev/null have normal permissions.
2185 The 4.73 fixes were a little too stringent and complained about the
2186 permissions on /dev/null. Exempt it from some checks.
2187 Reported by Andreas M. Kirchwitz.
2189 PP/03 Report version information for many libraries, including
2190 Exim version information for dynamically loaded libraries. Created
2191 version.h, now support a version extension string for distributors
2192 who patch heavily. Dynamic module ABI change.
2194 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2195 privilege escalation vulnerability whereby the Exim run-time user
2196 can cause root to append content of the attacker's choosing to
2199 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2202 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2203 If dropping privileges for untrusted macros, we disabled normal logging
2204 on the basis that it would fail; for the Exim run-time user, this is not
2205 the case, and it resulted in successful deliveries going unlogged.
2206 Fixed. Reported by Andreas Metzler.
2212 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2213 only prepend for the Resent-* case. Fixes regression introduced in
2214 Exim 4.70 by NM/22 for Bugzilla 607.
2216 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2217 increasing numbers of administrators be bitten by this.
2219 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2221 PP/03 Bugzilla 994: added openssl_options main configuration option.
2223 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2225 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2227 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2229 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2230 without a peer certificate, leading to a segfault because of an
2231 assumption that peers always have certificates. Be a little more
2232 paranoid. Problem reported by Martin Tscholak.
2234 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2235 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2236 NB: ClamAV planning to remove STREAM in "middle of 2010".
2237 CL also introduces -bmalware, various -d+acl logging additions and
2238 more caution in buffer sizes.
2240 PP/09 Implemented reverse_ip expansion operator.
2242 PP/10 Bugzilla 937: provide a "debug" ACL control.
2244 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2246 PP/12 Bugzilla 973: Implement --version.
2248 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2250 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2252 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2254 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2255 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2256 ignore trailing whitespace.
2258 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2260 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2263 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2264 Notification from Dr Andrew Aitchison.
2266 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2267 ExtendedDetectionInfo response format.
2268 Notification from John Horne.
2270 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2273 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2274 XSL and documented dependency on system catalogs, with examples of how
2277 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2280 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2281 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2282 configuration file which is writeable by the Exim user or group.
2284 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2285 of configuration files to cover files specified with the -C option if
2286 they are going to be used with root privileges, not just the default
2289 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2290 option (effectively making it always true).
2292 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2293 files to be used while preserving root privileges.
2295 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2296 that rogue child processes cannot use them.
2298 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2299 run-time user, instead of root.
2301 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2302 Exim run-time user without dropping privileges.
2304 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2305 result string, instead of calling string_vformat() twice with the same
2308 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2309 for other users. Others should always drop root privileges if they use
2310 -C on the command line, even for a whitelisted configure file.
2312 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2314 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2320 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2321 $data_path, and $header_path variables; fixed documentation bugs and
2324 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2325 exipick to access non-standard spools, including the "frozen" queue
2328 NM/01 Bugzilla 965: Support mysql stored procedures.
2329 Patch from Alain Williams
2331 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2333 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2334 Patch from Andreas Metzler
2336 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2337 Patch from Kirill Miazine
2339 NM/05 Bugzilla 671: Added umask to procmail example.
2341 JJ/03 installed exipick 20100323.0, fixing doc bug
2343 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2344 directory. Notification and patch from Dan Rosenberg.
2346 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2348 TK/02 Improve log output when DKIM signing operation fails.
2350 MH/01 Treat the transport option dkim_domain as a colon separated
2351 list, not as a single string, and sign the message with each element,
2352 omitting multiple occurences of the same signer.
2354 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2355 Bugzilla 985, 986. Patch by Simon Arlott
2357 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2358 Patch by Simon Arlott
2360 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2361 MBX locking. Notification from Dan Rosenberg.
2367 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2369 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2371 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2373 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2375 NM/04 Bugzilla 915: Flag broken perl installation during build.
2381 TK/01 Added patch by Johannes Berg that expands the main option
2382 "spamd_address" if it starts with a dollar sign.
2384 TK/02 Write list of recipients to X-Envelope-Sender header when building
2385 the mbox-format spool file for content scanning (suggested by Jakob
2388 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2389 (http://www.dcc-servers.net/) support via dccifd. Activated by
2390 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2392 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2393 by Mark Daniel Reidel <mr@df.eu>.
2395 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2396 When building exim an external PCRE library is now needed -
2397 PCRE is a system library on the majority of modern systems.
2398 See entry on PCRE_LIBS in EDITME file.
2400 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2401 conversation. Added nologin parameter to request.
2402 Patch contributed by Kirill Miazine.
2404 TF/01 Do not log submission mode rewrites if they do not change the address.
2406 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2408 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2409 log files in place. Contributed by Roberto Lima.
2411 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2413 TF/03 Bugzilla 615: When checking the local_parts router precondition
2414 after a local_part_suffix or local_part_prefix option, Exim now
2415 does not use the address's named list lookup cache, since this
2416 contains cached lookups for the whole local part.
2418 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2419 Robert Millan. Documentation is in experimental-spec.txt.
2421 TF/04 Bugzilla 668: Fix parallel build (make -j).
2423 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2425 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2426 Patch provided by Jan Srzednicki.
2428 TF/05 Leading white space used to be stripped from $spam_report which
2429 wrecked the formatting. Now it is preserved.
2431 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2432 that they are available at delivery time.
2434 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2436 TF/08 TLS error reporting now respects the incoming_interface and
2437 incoming_port log selectors.
2439 TF/09 Produce a more useful error message if an SMTP transport's hosts
2440 setting expands to an empty string.
2442 NM/06 Bugzilla 744: EXPN did not work under TLS.
2443 Patch provided by Phil Pennock.
2445 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2446 Patch provided by Richard Godbee.
2448 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2449 acl_smtp_notquit, added index entry.
2451 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2452 Patch provided by Eugene Bujak.
2454 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2455 accept(). Patch provided by Maxim Dounin.
2457 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2458 Patch provided by Phil Pennock.
2460 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2462 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2463 Patch provided by Brad "anomie" Jorsch.
2465 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2466 Patch provided by Dean Brooks.
2468 TK/05 Add native DKIM support (does not depend on external libraries).
2470 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2471 Patch provided by Graeme Fowler.
2473 NM/16 Bugzilla 851: Documentation example syntax fix.
2475 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2477 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2480 NM/19 Bugzilla 745: TLS version reporting.
2481 Patch provided by Phil Pennock.
2483 NM/20 Bugzilla 167: bool: condition support.
2484 Patch provided by Phil Pennock.
2486 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2487 clients. Patch provided by Phil Pennock.
2489 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2490 Patch provided by Brad "anomie" Jorsch.
2492 NM/23 Bugzilla 687: Fix misparses in eximstats.
2493 Patch provided by Heiko Schlittermann.
2495 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2496 Patch provided by Heiko Schlittermann.
2498 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2499 plus update to original patch.
2501 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2503 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2504 Patch provided by David Brownlee.
2506 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2508 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2510 NM/30 Bugzilla 888: TLS documentation bugfixes.
2512 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2514 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2515 Unlike the original bugzilla I have changed all shell scripts in src tree.
2517 NM/33 Bugzilla 898: Transport filter timeout fix.
2518 Patch by Todd Rinaldo.
2520 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2521 Patch by Serge Demonchaux.
2523 NM/35 Bugzilla 39: Base64 decode bug fixes.
2524 Patch by Jakob Hirsch.
2526 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2528 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2530 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2532 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2538 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2539 ALT-N's libdkim that I have put here:
2540 http://duncanthrax.net/exim-experimental/
2542 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2543 were called 'true' and it seems that C99 defines that as a reserved
2544 keyword to be used with 'bool' variable types. That means you could
2545 not include C99-style headers which use bools without triggering
2546 build errors in sieve.c.
2548 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2549 as mailq or other aliases. Changed the --help handling significantly
2550 to do whats expected. exim_usage() emits usage/help information.
2552 SC/01 Added the -bylocaldomain option to eximstats.
2554 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2556 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2558 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2564 PH/01 Another patch from the Sieve maintainer.
2566 PH/02 When an IPv6 address is converted to a string for single-key lookup
2567 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2568 dots are used instead of colons so that keys in lsearch files need not
2569 contain colons. This was done some time before quoting was made available
2570 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2571 (notated using the quote facility) so as to distinguish them from IPv4
2572 keys. This meant that lookups for IP addresses in host lists did not work
2573 for iplsearch lookups.
2575 This has been fixed by arranging for IPv6 addresses to be expressed with
2576 colons if the lookup type is iplsearch. This is not incompatible, because
2577 previously such lookups could never work.
2579 The situation is now rather anomalous, since one *can* have colons in
2580 ordinary lsearch keys. However, making the change in all cases is
2581 incompatible and would probably break a number of configurations.
2583 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2586 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2587 conversion specification without a maximum field width, thereby enabling
2588 a rogue spamd server to cause a buffer overflow. While nobody in their
2589 right mind would setup Exim to query an untrusted spamd server, an
2590 attacker that gains access to a server running spamd could potentially
2591 exploit this vulnerability to run arbitrary code as the Exim user.
2593 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2594 $primary_hostname instead of what libspf2 thinks the hosts name is.
2596 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2597 a directory entry by the name of the lookup key. Previously, if a
2598 symlink pointed to a non-existing file or a file in a directory that
2599 Exim lacked permissions to read, a lookup for a key matching that
2600 symlink would fail. Now it is enough that a matching directory entry
2601 exists, symlink or not. (Bugzilla 503.)
2603 PH/03 The body_linecount and body_zerocount variables are now exported in the
2606 PH/04 Added the $dnslist_matched variable.
2608 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2609 This means they are set thereafter only if the connection becomes
2612 PH/06 Added the client_condition to authenticators so that some can be skipped
2613 by clients under certain conditions.
2615 PH/07 The error message for a badly-placed control=no_multiline_responses left
2616 "_responses" off the end of the name.
2618 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2620 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2621 (without spaces) instead of just copying the configuration text.
2623 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2625 PH/11 Added $max_received_linelength.
2627 PH/12 Added +ignore_defer and +include_defer to host lists.
2629 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2630 way in which PCRE > 7.0 is built.
2632 PH/14 Implemented queue_only_load_latch.
2634 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2635 MAIL command. The effect was to mangle the value on 64-bit systems.
2637 PH/16 Another patch from the Sieve maintainer.
2639 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2641 PH/18 If a system quota error occurred while trying to create the file for
2642 a maildir delivery, the message "Mailbox is full" was not appended to the
2643 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2644 only to a quota excession during the actual writing of the file.
2646 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2647 characters?) which causes problems in log lines. The DN values are now
2648 passed through string_printing() before being added to log lines.
2650 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2651 and InterBase are left for another time.)
2653 PH/21 Added message_body_newlines option.
2655 PH/22 Guard against possible overflow in moan_check_errorcopy().
2657 PH/23 POSIX allows open() to be a macro; guard against that.
2659 PH/24 If the recipient of an error message contained an @ in the local part
2660 (suitably quoted, of course), incorrect values were put in $domain and
2661 $local_part during the evaluation of errors_copy.
2667 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2668 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2671 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2672 issue a MAIL command.
2674 PH/02 In an ACL statement such as
2676 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2678 if a client was not listed at all, or was listed with a value other than
2679 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2680 the condition was not true (as it should be), so access was not denied.
2681 The bug was that the ! inversion was incorrectly passed on to the second
2682 item. This has been fixed.
2684 PH/03 Added additional dnslists conditions == and =& which are different from
2685 = and & when the dns lookup returns more than one IP address.
2687 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2688 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2690 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2691 FSYNC, which compiles an option called disable_fsync that allows for
2692 bypassing fsync(). The documentation is heavily laced with warnings.
2694 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2696 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2697 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2698 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2699 including adding "make clean"; (3) Added -fPIC when compiling the test
2700 dynamically loaded module, to get rid of a warning.
2702 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2703 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2704 = 0s. The bug is otherwise harmless.
2706 PH/07 There was a bug in the dovecot authenticator such that the value of
2707 $auth1 could be overwritten, and so not correctly preserved, after a
2708 successful authentication. This usually meant that the value preserved by
2709 the server_setid option was incorrect.
2711 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2713 PH/09 Installed PCRE release 7.0.
2715 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2716 run for batched SMTP input. It is now run at the start of every message
2717 in the batch. While fixing this I discovered that the process information
2718 (output by running exiwhat) was not always getting set for -bs and -bS
2719 input. This is fixed, and it now also says "batched" for BSMTP.
2721 PH/11 Added control=no_pipelining.
2723 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2724 patch, slightly modified), and move the expansion of helo_data till after
2725 the connection is made in the smtp transport (so it can use these
2728 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2730 PH/14 Added log_selector = +pid.
2732 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2734 PH/16 Add ${if forany and ${if forall.
2736 PH/17 Added dsn_from option to vary the From: line in DSNs.
2738 PH/18 Flush SMTP output before performing a callout, unless control =
2739 no_callout_flush is set.
2741 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2742 was true (the default) a successful delivery failed to delete the retry
2743 item, thus causing premature timeout of the address. The bug is now
2746 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2748 PH/21 Long custom messages for fakedefer and fakereject are now split up
2749 into multiline responses in the same way that messages for "deny" and
2750 other ACL rejections are.
2752 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2753 with slight modification.
2755 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2756 draft, changing the syntax and factoring some duplicate code".
2758 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2759 for deliveries of the second and subsequent messages over the same SMTP
2762 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2763 ${reduce, with only minor "tidies".
2765 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2767 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2768 expansion side effects.
2770 PH/27 When a message times out after an over-quota error from an Exim-imposed
2771 quota, the bounce message says "mailbox is full". This message was not
2772 being given when it was a system quota that was exceeded. It now should
2775 MH/03 Made $recipients available in local_scan(). local_scan() already has
2776 better access to the recipient list through recipients_list[], but
2777 $recipients can be useful in postmaster-provided expansion strings.
2779 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2780 in the case of a MAIL command with additional options following the
2781 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2782 were accidentally chopped off.
2784 PH/29 SMTP synchronization checks are implemented when a command is read -
2785 there is a check that no more input is waiting when there shouldn't be
2786 any. However, for some commands, a delay in an ACL can mean that it is
2787 some time before the response is written. In this time, more input might
2788 arrive, invalidly. So now there are extra checks after an ACL has run for
2789 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2790 pipelining has not been advertised.
2792 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2794 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2795 returned in the SMTP response when smtp_return_error_details was false.
2796 This has been fixed.
2798 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2799 instead of the C I/O that was originally supplied, because problems were
2800 reported on Solaris.
2802 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2803 Exim which did not show up earlier: it was assuming that a call to
2804 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2805 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2806 was a macro that became an assignment, so it seemed to work. This has
2807 changed to a proper function call with a void return, hence the compile
2808 error. Exim's code has been fixed.
2810 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2813 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2815 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2817 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2818 because it turns out to be too big or there is a timeout) there is no
2819 "Completed" line in the log. When some messages of this type were
2820 selected by exigrep, they were listed as "not completed". Others were
2821 picked up by some special patterns. I have improved the selection
2822 criteria to be more general.
2824 PH/38 The host_find_failed option in the manualroute router can now be set
2825 to "ignore", to completely ignore a host whose IP address cannot be
2826 found. If all hosts are ignored, the behaviour is controlled by the new
2827 host_all_ignored option.
2829 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2830 homing or because of multiple MX records with /mx) generated more than
2831 one IP address, and the following item turned out to be the local host,
2832 all the secondary addresses of the first item were incorrectly removed
2833 from the list, along with the local host and any following hosts (which
2834 is what is supposed to happen).
2836 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2837 whoever called Exim into the -H file. In the case of the daemon it was
2838 behaving confusingly. When first started, it used values for whoever
2839 started the daemon, but after a SIGHUP it used the Exim user (because it
2840 calls itself on a restart). I have changed the code so that it now always
2843 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2844 message are rejected with the same error (e.g. no authentication or bad
2845 sender address), and a DATA command is nevertheless sent (as can happen
2846 with PIPELINING or a stupid MUA), the error message that was given to the
2847 RCPT commands is included in the rejection of the DATA command. This is
2848 intended to be helpful for MUAs that show only the final error to their
2851 PH/42 Another patch from the Sieve maintainer.
2853 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2854 Eximstats - Fixed some broken HTML links and added missing column headers
2856 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2857 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2859 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2861 PH/43 Yet another patch from the Sieve maintainer.
2863 PH/44 I found a way to check for a TCP/IP connection going away before sending
2864 the response to the final '.' that terminates a message, but only in the
2865 case where the client has not sent further data following the '.'
2866 (unfortunately, this is allowed). However, in many cases there won't be
2867 any further data because there won't be any more messages to send. A call
2868 to select() can be used: if it shows that the input is "ready", there is
2869 either input waiting, or the socket has been closed. An attempt to read
2870 the next input character can distinguish the two cases. Previously, Exim
2871 would have sent an OK response which the client would never have see.
2872 This could lead to message repetition. This fix should cure that, at
2873 least in a lot of common cases.
2875 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2876 advertised in response to EHLO.
2882 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2883 fixed by 4.65/MH/01 (is this a record?) are fixed:
2885 (i) An empty string was always treated as zero by the numeric comparison
2886 operators. This behaviour has been restored.
2888 (ii) It is documented that the numeric comparison operators always treat
2889 their arguments as decimal numbers. This was broken in that numbers
2890 starting with 0 were being interpreted as octal.
2892 While fixing these problems I realized that there was another issue that
2893 hadn't been noticed. Values of message_size_limit (both the global option
2894 and the transport option) were treated as octal if they started with 0.
2895 The documentation was vague. These values are now always treated as
2896 decimal, and I will make that clear in the documentation.
2902 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2903 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2906 MH/01 Don't check that the operands of numeric comparison operators are
2907 integers when their expansion is in "skipping" mode (fixes bug
2908 introduced by 4.64-PH/07).
2910 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2911 child addresses, Exim now panics and dies. Previously, because the count
2912 is held in a short int, deliveries were likely to be lost. As such a
2913 large number of recipients for a single message is ridiculous
2914 (performance will be very, very poor), I have chosen to impose a limit
2915 rather than extend the field.
2921 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2922 leftover -K file (the existence of which was triggered by #402).
2923 While we were at it, introduced process PID as part of the -K
2924 filename. This should rule out race conditions when creating
2927 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2928 processing considerably. Previous code took too long for large mails,
2929 triggering a timeout which in turn triggers #401.
2931 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2932 in the DK code in transports.c. sendfile() is not really portable,
2933 hence the _LINUX specificness.
2935 TF/01 In the add_headers option to the mail command in an Exim filter,
2936 there was a bug that Exim would claim a syntax error in any
2937 header after the first one which had an odd number of characters
2940 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2941 callout verification, Exim cached a "reject" for the entire domain. This
2942 is correct for most verifications, but it is not correct for a recipient
2943 verification with use_sender or use_postmaster set, because in that case
2944 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2945 case of MAIL FROM:<> rejection from other early rejections (e.g.
2946 rejection of HELO). When verifying a recipient using a non-null MAIL
2947 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2948 Whatever the result of the callout, the value of the domain cache is
2949 left unchanged (for any other kind of callout, getting as far as trying
2950 RCPT means that the domain itself is ok).
2952 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2955 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2956 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2957 session, the daemon ignores ECONNECT errors and logs others; it now
2958 ignores EPIPE as well.
2960 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2961 (quoted-printable decoding).
2963 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2964 later the small subsequent patch to fix an introduced bug.
2966 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2968 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2970 PH/08 An error is now given if message_size_limit is specified negative.
2972 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2973 to be given (somewhat) arbitrary names.
2975 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2978 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2979 miscellaneous code fixes
2981 PH/10 Added the log_reject_target ACL modifier to specify where to log
2984 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2985 hostname. This is wrong, because it relates to the incoming message (and
2986 probably the interface on which it is arriving) and not to the outgoing
2987 callout (which could be using a different interface). This has been
2988 changed to use the value of the helo_data option from the smtp transport
2989 instead - this is what is used when a message is actually being sent. If
2990 there is no remote transport (possible with a router that sets up host
2991 addresses), $smtp_active_hostname is used.
2993 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2994 tweaks were necessary in order to get it to work (see also 21 below):
2995 (a) The code assumed that strncpy() returns a negative number on buffer
2996 overflow, which isn't the case. Replaced with Exim's string_format()
2998 (b) There were several signed/unsigned issues. I just did the minimum
2999 hacking in of casts. There is scope for a larger refactoring.
3000 (c) The code used strcasecmp() which is not a standard C function.
3001 Replaced with Exim's strcmpic() function.
3002 (d) The code set only $1; it now sets $auth1 as well.
3003 (e) A simple test gave the error "authentication client didn't specify
3004 service in request". It would seem that Dovecot has changed its
3005 interface. Fortunately there's a specification; I followed it and
3006 changed what the client sends and it appears to be working now.
3008 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3011 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3012 address A is aliased to B and C, where B exists and C does not. Without
3013 -v the output is "A verified" because verification stops after a
3014 successful redirection if more than one address is generated. However,
3015 with -v the child addresses are also verified. Exim was outputting "A
3016 failed to verify" and then showing the successful verification for C,
3017 with its parentage. It now outputs "B failed to verify", showing B's
3018 parentage before showing the successful verification of C.
3020 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3021 look up a TXT record in a specific list after matching in a combined
3024 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3025 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3026 they consult the DNS. I had assumed they would set it the way they
3027 wanted; and indeed my experiments on Linux seem to show that in some
3028 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3029 To be on the safe side, however, I have now made the interface to
3030 host_find_byname() similar to host_find_bydns(), with an argument
3031 containing the DNS resolver options. The host_find_byname() function now
3032 sets these options at its start, just as host_find_bydns() does. The smtp
3033 transport options dns_qualify_single and dns_search_parents are passed to
3034 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3035 of host_find_byname() use the default settings of RES_DEFNAMES
3036 (qualify_single) but not RES_DNSRCH (search_parents).
3038 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3039 spool_read_header() do less string testing, by means of a preliminary
3040 switch on the second character of optional "-foo" lines. (This is
3041 overdue, caused by the large number of possibilities that now exist.
3042 Originally there were few.) While I was there, I also converted the
3043 str(n)cmp tests so they don't re-test the leading "-" and the first
3044 character, in the hope this might squeeze out yet more improvement.
3046 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3047 flag allowing group syntax was set by the header_syntax check but not
3048 turned off, possible causing trouble later; (2) The flag was not being
3049 set at all for the header_verify test, causing "group"-style headers to
3050 be rejected. I have now set it in this case, and also caused header_
3051 verify to ignore an empty address taken from a group. While doing this, I
3052 came across some other cases where the code for allowing group syntax
3053 while scanning a header line wasn't quite right (mostly, not resetting
3054 the flag correctly in the right place). These bugs could have caused
3055 trouble for malformed header lines. I hope it is now all correct.
3057 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3058 with the "reply" argument non-NULL. The code, however (which originally
3059 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3060 but it didn't always do it. This confused somebody who was copying the
3061 code for some other use. I have removed all the tests.
3063 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3064 feature that was used to support insecure browsers during the U.S. crypto
3065 embargo. It requires special client support, and Exim is probably the
3066 only MTA that supported it -- and would never use it because real RSA is
3067 always available. This code has been removed, because it had the bad
3068 effect of slowing Exim down by computing (never used) parameters for the
3069 RSA_EXPORT functionality.
3071 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3072 authenticator to fail if there's a tab character in the incoming data
3073 (there should never be unless someone is messing about, as it's supposed
3074 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3075 if the connection is using TLS or if the remote IP is the same as the
3076 local IP, and the "valid-client-cert option" if a client certificate has
3079 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3080 authenticators. This can be used for authorization after authentication
3081 succeeds. (In the case of plaintext, it servers for both authentication
3084 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3085 if any retry times were supplied.
3087 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3088 connection, where there is no client IP address to check. In this
3089 situation, the verify now always succeeds.
3091 PH/25 Applied John Jetmore's -Mset patch.
3093 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3095 PH/27 In a string expansion for a processed (not raw) header when multiple
3096 headers of the same name were present, leading whitespace was being
3097 removed from all of them, but trailing whitespace was being removed only
3098 from the last one. Now trailing whitespace is removed from each header
3099 before concatenation. Completely empty headers in a concatenation (as
3100 before) are ignored.
3102 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3103 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3105 PH/29 [Removed. This was a change that I later backed out, and forgot to
3106 correct the ChangeLog entry (that I had efficiently created) before
3107 committing the later change.]
3109 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3110 address errors (4xx response to RCPT) over the same connection as other
3111 messages routed to the same hosts. Such deliveries are always "forced",
3112 so retry times are not inspected. This resulted in far too many retries
3113 for the affected addresses. The effect occurred only when there were more
3114 hosts than the hosts_max_try setting in the smtp transport when it had
3115 the 4xx errors. Those hosts that it had tried were not added to the list
3116 of hosts for which the message was waiting, so if all were tried, there
3117 was no problem. Two fixes have been applied:
3119 (i) If there are any address or message errors in an SMTP delivery, none
3120 of the hosts (tried or untried) are now added to the list of hosts
3121 for which the message is waiting, so the message should not be a
3122 candidate for sending over the same connection that was used for a
3123 successful delivery of some other message. This seems entirely
3124 reasonable: after all the message is NOT "waiting for some host".
3125 This is so "obvious" that I'm not sure why it wasn't done
3126 previously. Hope I haven't missed anything, but it can't do any
3127 harm, as the worst effect is to miss an optimization.
3129 (ii) If, despite (i), such a delivery is accidentally attempted, the
3130 routing retry time is respected, so at least it doesn't keep
3131 hammering the server.
3133 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3134 in ${readsocket because some servers need this prod.
3136 PH/32 Added some extra debug output when updating a wait-xxx database.
3138 PH/33 The hint "could be header name not terminated by colon", which has been
3139 given for certain expansion errors for a long time, was not being given
3140 for the ${if def:h_colon_omitted{... case.
3142 PH/34 The spec says: "With one important exception, whenever a domain list is
3143 being scanned, $domain contains the subject domain." There was at least
3144 one case where this was not true.
3146 PH/35 The error "getsockname() failed: connection reset by peer" was being
3147 written to the panic log as well as the main log, but it isn't really
3148 panic-worthy as it just means the connection died rather early on. I have
3149 removed the panic log writing for the ECONNRESET error when getsockname()
3152 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3153 runs only) independently of the message's sender address. This meant
3154 that, if the 4xx error was in fact related to the sender, a different
3155 message to the same recipient with a different sender could confuse
3156 things. In particular, this can happen when sending to a greylisting
3157 server, but other circumstances could also provoke similar problems.
3158 I have changed the default so that the retry time for these errors is now
3159 based a combination of the sender and recipient addresses. This change
3160 can be overridden by setting address_retry_include_sender=false in the
3163 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3164 remote server are returned as part of bounce messages. This was not
3165 happening for LMTP over a pipe (the lmtp transport), but now it is the
3166 same for both kinds of LMTP.
3168 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3169 in header lines that were in fact CNAMEs. This is no longer the case.
3171 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3172 and queue runs started by the daemon processed all messages. This has
3173 been fixed so that -R and -S can now usefully be given with -q<time>.
3175 PH/40 Import PCRE release 6.7 (fixes some bugs).
3177 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3179 PH/42 Give an error if -q is specified more than once.
3181 PH/43 Renamed the variables $interface_address and $interface_port as
3182 $received_ip_address and $received_port, to make it clear that these
3183 values apply to message reception, and not to the outgoing interface when
3184 a message is delivered. (The old names remain recognized, of course.)
3186 PH/44 There was no timeout on the connect() call when using a Unix domain
3187 socket in the ${readsocket expansion. There now is.
3189 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3190 be meaningful with "accept".
3192 SC/01 Eximstats V1.43
3193 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3195 SC/02 Eximstats V1.44
3196 Use a glob alias rather than an array ref in the generated
3197 parser. This improves both readability and performance.
3199 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3200 Collect SpamAssassin and rejection statistics.
3201 Don't display local sender or destination tables unless
3202 there is data to show.
3203 Added average volumes into the top table text output.
3205 SC/04 Eximstats V1.46
3206 Collect data on the number of addresses (recipients)
3207 as well as the number of messages.
3209 SC/05 Eximstats V1.47
3210 Added 'Message too big' to the list of mail rejection
3211 reasons (thanks to Marco Gaiarin).
3213 SC/06 Eximstats V1.48
3214 Mainlog lines which have GMT offsets and are too short to
3215 have a flag are now skipped.
3217 SC/07 Eximstats V1.49 (Alain Williams)
3218 Added the -emptyok flag.
3220 SC/08 Eximstats V1.50
3221 Fixes for obtaining the IP address from reject messages.
3223 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3224 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3225 whitespace changes from 4.64-PH/27
3227 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3230 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3231 are found, allow negative numbers in numeric criteria)
3233 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3235 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3236 to match changes made in 4.64-PH/43
3238 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3240 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3241 "domain" is actually an IP address, and force a failure. This locks out
3242 those revolvers/nameservers that support "A-for-A" lookups, in
3243 contravention of the specifications.
3245 PH/48 When a host name was looked up from an IP address, and the subsequent
3246 forward lookup of the name timed out, the host name was left in
3247 $sender_host_name, contrary to the specification.
3249 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3250 restricted to single-key lookups, Exim was not diagnosing an error if
3251 * or *@ was used with a query-style lookup.
3253 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3255 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3256 long ago, but noone interested enough thought of it. Let's just say that
3257 the "1.1" means that there are some new functions that weren't there at
3258 some point in the past.
3260 PH/51 Error processing for expansion failure of helo_data from an smtp
3261 transport during callout processing was broken.
3263 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3264 tested/used via the -bh/-bhc/-bs options.
3266 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3267 bug, fixed in subsequent PCRE releases).
3269 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3270 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3272 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3278 SC/01 Use a glob alias rather than an array ref in eximstats generated
3279 parser. This improves both readability and performance.
3281 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3282 Don't display local sender or destination tables in eximstats unless
3283 there is data to show.
3284 Added average volumes into the eximstats top table text output.
3286 SC/03 Collect data on the number of addresses (recipients) as well
3287 as the number of messages in eximstats.
3289 TF/01 Correct an error in the documentation for the redirect router. Exim
3290 does (usually) call initgroups() when daemonizing.
3292 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3293 with consistent privilege compared to when running as a daemon.
3295 TF/03 Note in the spec that $authenticated_id is not set for local
3296 submissions from trusted users.
3298 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3299 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3301 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3302 by adding some example configuration directives to the default
3303 configuration file. A little bit of work is required to uncomment the
3304 directives and define how usernames and passwords are checked, but
3305 there is now a framework to start from.
3307 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3308 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3309 without this. I don't know how relevant this is to other LDAP libraries.
3311 PH/02 Add the verb name to the "unknown ACL verb" error.
3313 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3315 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3317 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3318 directory not expanded when it should be if an expanded home directory
3319 was set for the address (which is overridden by the transport).
3321 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3324 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3325 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3326 because it is too late at that time, and has no effect.
3328 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3329 security issue with \' (bugzilla #107). I could not use the
3330 PQescapeStringConn() function, because it needs a PGconn value as one of
3333 PH/08 When testing addresses using -bt, indicate those final addresses that
3334 are duplicates that would not cause an additional delivery. At least one
3335 person was confused, thinking that -bt output corresponded to deliveries.
3336 (Suppressing duplicates isn't a good idea as you lose the information
3337 about possibly different redirections that led to the duplicates.)
3339 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3340 systems where poll() doesn't work, in particular OS X.
3342 PH/10 Added more information to debugging output for retry time not reached.
3344 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3345 operations in malware.c.
3347 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3350 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3351 syslog_duplication set false, log lines that would normally be written
3352 both the the main log and to the reject log were not written to syslog at
3355 PH/14 In the default configuration, change the use of "message" in ACL warn
3356 statements to "add_header".
3358 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3359 not followed by a command (e.g. "seen endif").
3361 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3362 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3365 PH/17 Added extra conditions to the default value of delay_warning_condition
3369 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3370 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3371 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3374 The Auto-Submitted: and various List- headers are standardised, whereas I
3375 don't think Precedence: ever was.
3377 PH/18 Refactored debugging code in route_finduser() to show more information,
3378 in particular, the error code if getpwnam() issues one.
3380 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3381 This is apparently needed in addition to the PH/07 change above to avoid
3382 any possible encoding problems.
3384 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3385 but not after initializing Perl.
3387 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3388 output them only if debugging. By default they are written stderr,
3389 apparently, which is not desirable.
3391 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3394 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3397 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3399 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3400 authenticated or an ident call has been made. Suppress the default
3401 values for $authenticated_id and $authenticated_sender (but permit -oMai
3402 and -oMas) when testing with -bh.
3404 PH/24 Re-jigged the order of the tests in the default configuration so that the
3405 tests for valid domains and recipients precede the DNS black list and CSA
3406 tests, on the grounds that those ones are more expensive.
3408 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3409 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3410 This bug exists in every version of Exim that I still have, right back to
3413 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3414 However, an attempt to turn on case-sensitivity in a regex key by
3415 including (?-i) didn't work because the subject string was already
3416 lowercased, and the effects were non-intuitive. It turns out that a
3417 one-line patch can be used to allow (?-i) to work as expected.
3423 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3424 other effects) broke the use of negated acl sub-conditions.
3426 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3429 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3430 "Deny" causes Exim to reject the incoming connection with a 554 error.
3431 Unfortunately, if there is a major crisis, such as a disk failure,
3432 tcp-wrappers gives "deny", whereas what one would like would be some
3433 kind of temporary error. A kludge has been added to help with this.
3434 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3435 554 error is used if errno is still zero or contains ENOENT (which occurs
3436 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3439 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3441 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3442 errors. Otherwise a message that provokes a temporary error (when other
3443 messages do not) can cause a whole host to time out.
3445 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3446 addresses were routed directly to files or pipes from a redirect router.
3447 File deliveries just didn't batch; pipe deliveries might have suffered
3450 PH/06 A failure to get a lock for a hints database would erroneously always say
3451 "Failed to get write lock", even when it was really a read lock.
3453 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3454 of 0600. This has been changed to use the value of the lockfile_mode
3455 option (which defaults to 0600).
3457 PH/08 Applied small patch from the Sieve maintainer.
3459 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3460 folder from quota calculations, a direct delivery into this folder messed
3461 up the contents of the maildirsize file. This was because the regex was
3462 used only to exclude .Trash (or whatever) when the size of the mailbox
3463 was calculated. There was no check that a delivery was happening into an
3464 excluded directory. This bug has been fixed by ignoring all quota
3465 processing for deliveries into excluded directories.
3467 PH/10 Added the maildirfolder_create_regex option to appendfile.
3473 PH/01 The code for finding all the local interface addresses on a FreeBSD
3474 system running IPv6 was broken. This may well have applied to all BSD
3475 systems, as well as to others that have similar system calls. The broken
3476 code found IPv4 interfaces correctly, but gave incorrect values for the
3477 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3478 that it would not match correctly against @[] and not recognize the IPv6
3481 PH/02 The ipliteral router was not recognizing addresses of the form user@
3482 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3484 PH/03 Added disable_ipv6.
3486 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3487 decoded form, because it is most often used to construct To: headers
3488 lines in autoreplies, and the decoded form may well be syntactically
3489 invalid. However, $reply_address has leading white space removed, and all
3490 newlines turned into spaces so that the autoreply transport does not
3493 PH/05 If group was specified without a user on a router, and no group or user
3494 was specified on a transport, the group from the router was ignored.
3496 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3497 for visible compile-time settings that can be used to change these
3498 numbers, for those that want even more. Backwards compatibility with old
3499 spool files has been maintained. However, going back to a previous Exim
3500 release will lost any variables that are in spool files.
3502 PH/07 Two small changes when running in the test harness: increase delay when
3503 passing a TCP/IP connection to a new process, in case the original
3504 process has to generate a bounce, and remove special handling of
3505 127.0.0.2 (sic), which is no longer necessary.
3507 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3508 be the same on different OS.
3510 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3513 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3514 whether --show-vars was specified or not
3516 JJ/02 exipick: Added support for new ACL variable spool format introduced
3519 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3520 syntactically invalid From: or Reply-to: line, and a filter used this to
3521 generate an autoreply, and therefore failed to obtain an address for the
3522 autoreply, Exim could try to deliver to a non-existent relative file
3523 name, causing unrelated and misleading errors. What now happens is that
3524 it logs this as a hard delivery error, but does not attempt to create a
3527 PH/11 The exinext utility has a -C option for testing purposes, but although
3528 the given file was scanned by exinext itself; it wasn't being passed on
3529 when Exim was called.
3531 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3532 an end-of-file indication when reading a command response.
3534 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3535 compiled. In many other places in Exim, IPv6 addresses are always
3536 recognized, so I have changed this. It also means that IPv4 domain
3537 literals of the form [IPV4:n.n.n.n] are now always recognized.
3539 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3540 used if the router is not running as root, for example, when verifying at
3541 ACL time, or when using -bh. The debugging output from this situation was
3542 non-existent - all you got was a failure to exec. I have made two
3545 (a) Failures to set uid/gid, the current directory, or a process leader
3546 in a subprocess such as that created by queryprogram now generate
3547 suitable debugging output when -d is set.
3549 (b) The queryprogram router detects when it is not running as root,
3550 outputs suitable debugging information if -d is set, and then runs
3551 the subprocess without attempting to change uid/gid.
3553 PH/15 Minor change to Makefile for building test_host (undocumented testing
3556 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3557 additional section of a DNS packet that returns MX or SRV records.
3558 Instead, it always explicitly searches for A/AAAA records. This avoids
3559 major problems that occur when a DNS server includes only records of one
3560 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3561 fixed another bug: if SRV records were looked up and the corresponding
3562 address records were *not* found in the additional section, the port
3563 values from the SRV records were lost.
3565 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3566 using the correct key (the original address) when searching the retry
3567 rules in order to find which one to use for generating the retry hint.
3569 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3570 adding the default one. Similarly, if it contains a Reply-To: header, the
3571 errors_reply_to option, if set, is not used.
3573 PH/19 When calculating a retry time, Exim used to measure the "time since
3574 failure" by looking at the "first failed" field in the retry record. Now
3575 it does not use this if it is later than than the arrival time of the
3576 message. Instead it uses the arrival time. This makes for better
3577 behaviour in cases where some deliveries succeed, thus re-setting the
3578 "first failed" field. An example is a quota failure for a huge message
3579 when small messages continue to be delivered. Without this change, the
3580 "time since failure" will always be short, possible causing more frequent
3581 delivery attempts for the huge message than are intended.
3582 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3584 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3585 $1, $2, $3) because the numerical variables can be reset during some
3586 expansion items (e.g. "match"), thereby losing the authentication data.
3588 PH/21 Make -bV show the size of off_t variables so that the test suite can
3589 decide whether to run tests for quotas > 2G.
3591 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3592 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3593 filecount value is greater than 2G or if a quota value is greater than 2G
3594 on a system where the size of off_t is not greater than 4, a panic error
3597 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3598 never match. The debug and -bh output now contains an explicit error
3599 message indicating a malformed IPv4 address or mask.
3601 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3602 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3603 PH/23 above applies.
3605 PH/25 Do not write to syslog when running in the test harness. The only
3606 occasion when this arises is a failure to open the main or panic logs
3607 (for which there is an explicit test).
3609 PH/26 Added the /no_tell option to "control=freeze".
3611 PH/27 If a host name lookup failed very early in a connection, for example, if
3612 the IP address matched host_lookup and the reverse lookup yielded a name
3613 that did not have a forward lookup, an error message of the form "no IP
3614 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3615 could be logged. Now it outputs the IP address instead of "NULL".
3617 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3618 allows the sender and the authenticated sender to be set when
3619 submitting a message from within Exim. Since child_open_exim() is
3620 documented for local_scan(), the new function should be too.
3622 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3623 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3624 results in an empty string is now treated as unset.
3626 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3628 PH/31 Added sender_verify_fail logging option.
3630 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3631 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3632 tidied the source and removed it altogether.
3634 PH/33 When a queue run was abandoned because the load average was too high, a
3635 log line was always written; now it is written only if the queue_run log
3636 selector is set. In addition, the log line for abandonment now contains
3637 information about the queue run such as the pid. This is always present
3638 in "start" and "stop" lines but was omitted from the "abandon" line.
3640 PH/34 Omit spaces between a header name and the colon in the error message that
3641 is given when verify = headers_syntax fails (if there are lots of them,
3642 the message gets confusing).
3644 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3645 names, as there are now some PTR records that contain slashes. This check
3646 is only to protect against broken name servers that fall over on strange
3647 characters, so the fact that it applies to all lookups doesn't matter.
3649 PH/36 Now that the new test suite is complete, we can remove some of the
3650 special code in Exim that was needed for the old test suite. For example,
3651 sorting DNS records because real resolvers return them in an arbitrary
3652 order. The new test suite's fake resolver always returns records in the
3655 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3656 bounces) except when queue_only is set, to avoid logging races between
3657 the different processes.
3659 PH/38 Panic-die if .include specifies a non-absolute path.
3661 PH/39 A tweak to the "H" retry rule from its user.
3663 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3664 a label. They prevented compilation on older perls.
3666 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3667 a warning to be raised on newish perls.
3669 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3670 on queue. Changes to match documented behaviour of showing count of
3671 messages matching specified criteria.
3673 PH/40 Changed the default ident timeout from 30s to 5s.
3675 PH/41 Added support for the use of login_cap features, on those BSD systems
3676 that have them, for controlling the resources used by pipe deliveries.
3678 PH/42 The content-scanning code uses fopen() to create files in which to put
3679 message data. Previously it was not paying any attention to the mode of
3680 the files. Exim runs with umask(0) because the rest of the code creates
3681 files with open(), and sets the required mode explicitly. Thus, these
3682 files were ending up world-writeable. This was not a big issue, because,
3683 being within the spool directory, they were not world-accessible. I have
3684 created a function called modefopen, which takes an additional mode
3685 argument. It sets umask(777), creates the file, chmods it to the required
3686 mode, then resets the umask. All the relevant calls to fopen() in the
3687 content scanning code have been changed to use this function.
3689 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3690 to 24 hours. This avoids potential overflow problems when processing G
3691 and H retry rules. I suspect nobody ever tinkers with this value.
3693 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3695 PH/45 When the plaintext authenticator is running as a client, the server's
3696 challenges are checked to ensure they are valid base64 strings. By
3697 default, the authentication attempt is cancelled if an invalid string is
3698 received. Setting client_ignore_invalid_base64 true ignores these errors.
3699 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3700 they are received. Thus, the responses can be made to depend on the
3701 challenges. If an invalid string is ignored, an empty string is placed in
3704 PH/46 Messages that are created by the autoreply transport now contains a
3705 References: header, in accordance with RFCs 2822 and 3834.
3707 PH/47 Added authenticated_sender_force to the smtp transport.
3709 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3711 PH/49 Installed latest patch from the Sieve maintainer.
3713 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3714 was also set, the appendfile transport was unnecessarily scanning a
3715 directory of message files (e.g. for maildir delivery) to find the count
3716 of files (along with the size), even though it did not need this
3717 information. It now does the scan only if it needs to find either the
3718 size of the count of files.
3720 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3722 PH/52 Two bugs concerned with error handling when the smtp transport is
3725 (i) Exim was not creating retry information for temporary errors given
3726 for individual recipients after the DATA command when the smtp transport
3727 was used in LMTP mode. This meant that they could be retried too
3728 frequently, and not timed out correctly.
3730 (ii) Exim was setting the flag that allows error details to be returned
3731 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3732 recipients that were returned after the DATA command.
3734 PH/53 This is related to PH/52, but is more general: for any failing address,
3735 when detailed error information was permitted to be returned to the
3736 sender, but the error was temporary, then after the final timeout, only
3737 "retry timeout exceeded" was returned. Now it returns the full error as
3738 well as "retry timeout exceeded".
3740 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3741 do this, and (what is worse) MTAs that accept it.
3743 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3744 will now be deprecated.
3746 PH/56 New os.c-cygwin from the Cygwin maintainer.
3748 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3749 formats (previously only available in exim formats via -bpr, -bpru,
3750 and -bpra. Now also available in native and exiqgrep formats)
3752 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3753 with very large, slow to parse queues
3755 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3757 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3759 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3760 responses to authentication challenges, though it was showing the
3761 challenges; (ii) I've removed the CR characters from the debug output for
3764 PH/58 Allow for the insertion of a newline as well as a space when a string
3765 is turned into more than one encoded-word during RFC 2047 encoding. The
3766 Sieve code now uses this.
3768 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3769 data_4xx, lost_connection, tls_required.
3771 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3772 message was being sent as an SMTP response.
3774 PH/61 Add -l and -k options to exicyclog.
3776 PH/62 When verifying, if an address was redirected to one new address, so that
3777 verification continued, and the new address failed or deferred after
3778 having set something in $address_data, the value of $address_data was not
3779 passed back to the ACL. This was different to the case when no
3780 redirection occurred. The value is now passed back in both cases.
3782 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3783 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3784 use login_cap.h, so on its own it isn't the distinguishing feature. The
3785 new name refers directly to the setclassresources() function.
3787 PH/65 Added configuration files for NetBSD3.
3789 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3791 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3792 is preferred over IPv4.
3794 PH/68 The bounce_return_message and bounce_return_body options were not being
3795 honoured for bounces generated during the reception of non-SMTP messages.
3796 In particular, this applied to messages rejected by the ACL. This bug has
3797 been fixed. However, if bounce_return_message is true and bounce_return_
3798 body is false, the headers that are returned for a non-SMTP message
3799 include only those that have been read before the error was detected.
3800 (In the case of an ACL rejection, they have all been read.)
3802 PH/69 The HTML version of the specification is now built in a directory called
3803 spec_html instead of spec.html, because the latter looks like a path with
3804 a MIME-type, and this confuses some software.
3806 PH/70 Catch two compiler warnings in sieve.c.
3808 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3809 function verify_get_ident() calls ip_connect() to connect a socket, but
3810 if the "connect()" function timed out, ip_connect() used to close the
3811 socket. However, verify_get_ident() also closes the socket later, and in
3812 between Exim writes to the log, which may get opened at this point. When
3813 the socket was closed in ip_connect(), the log could get the same file
3814 descriptor number as the socket. This naturally causes chaos. The fix is
3815 not to close the socket in ip_connect(); the socket should be closed by
3816 the function that creates it. There was only one place in the code where
3817 this was missing, in the iplookup router, which I don't think anybody now
3818 uses, but I've fixed it anyway.
3820 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3821 well as to direct DNS lookups. Otherwise the handling of names in host
3822 lists is inconsistent and therefore confusing.
3828 PH/01 Two changes to the default runtime configuration:
3830 (1) Move the checks for relay_from_hosts and authenticated clients from
3831 after to before the (commented out) DNS black list checks.
3833 (2) Add control=submission to the relay_from_hosts and authenticated
3834 clients checks, on the grounds that messages accepted by these
3835 statements are most likely to be submissions.
3837 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3839 (1) Generate an error if the third argument for the ${prvs expansion is
3842 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3845 (3) Reset the variables that are obtained from the first argument of
3846 ${prvscheck and used in the second argument before leaving the code,
3847 because their memory is reclaimed, so using them afterwards may do
3850 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3851 one (it's much easier than Tom thought :-).
3853 (5) Because of (4), we can now allow for the use of $prvscheck_result
3854 inside the third argument.
3856 PH/03 For some reason, the default setting of PATH when running a command from
3857 a pipe transport was just "/usr/bin". I have changed it to
3860 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3861 anything to be listed in the output from -bV.
3863 PH/05 When a filter generated an autoreply, the entire To: header line was
3864 quoted in the delivery log line, like this:
3866 => >A.N.Other <ano@some.domain> <original@ddress> ...
3868 This has been changed so that it extracts the operative address. There
3869 may be more than one such address. If so, they are comma-separated, like
3872 => >ano@some.domain,ona@other.domain <original@ddress> ...
3874 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3875 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3876 not being looked up in the rDNS to get a host name, Exim was showing the
3877 IP address twice in Received: lines, even though the IP addresses were
3878 identical. For example:
3880 Received: from [1.2.3.4] (helo=[1.2.3.4])
3882 However, if the real host name was known, it was omitting the HELO data
3883 if it matched the actual IP address. This has been tidied up so that it
3884 doesn't show the same IP address twice.
3886 PH/07 When both +timestamp and +memory debugging was on, the value given by
3887 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3888 called by the debug printing, thereby overwriting the timestamp buffer.
3889 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3891 PH/08 When the original message was included in an autoreply transport, it
3892 always said "this is a copy of the message, including all the headers",
3893 even if body_only or headers_only was set. It now gives an appropriate
3896 PH/09 Applied a patch from the Sieve maintainer which:
3898 o fixes some comments
3899 o adds the (disabled) notify extension core
3900 o adds some debug output for the result of if/elsif tests
3901 o points to the current vacation draft in the documentation
3902 and documents the missing references header update
3906 o fixes a bug in processing the envelope test (when testing
3907 multiple envelope elements, the last element determined the
3910 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3911 Electronic Mail") by including:
3913 Auto-submitted: auto-generated
3915 in the messages that it generates (bounce messages and others, such as
3916 warnings). In the case of bounce messages for non-SMTP messages, there was
3917 also a typo: it was using "Auto_submitted" (underscore instead of
3918 hyphen). Since every message generated by Exim is necessarily in response
3919 to another message, thes have all been changed to:
3921 Auto-Submitted: auto-replied
3923 in accordance with these statements in the RFC:
3925 The auto-replied keyword:
3927 - SHOULD be used on messages sent in direct response to another
3928 message by an automatic process,
3930 - MUST NOT be used on manually-generated messages,
3932 - MAY be used on Delivery Status Notifications (DSNs) and Message
3933 Disposition Notifications (MDNs),
3935 - MUST NOT be used on messages generated by automatic or periodic
3936 processes, except for messages which are automatic responses to
3939 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3940 to the default Received: header definition.
3942 PH/12 Added log selector acl_warn_skipped (default on).
3944 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3945 variables because (a) they are in the wrong storage pool and (b) even if
3946 they were copied, it wouldn't work properly because of the caching.
3948 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3949 checking when decoding. Apparently there are clients that generate
3950 overlong encoded strings. Why am I not surprised?
3952 PH/15 If the first argument of "${if match_address" was not empty, but did not
3953 contain an "@" character, Exim crashed. Now it writes a panic log message
3954 and treats the condition as false.
3956 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3958 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3959 extension "envelope-auth". The code is finished and in agreement with
3960 other implementations, but there is no documentation so far and in fact,
3961 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3962 not changing the active code.
3964 Print executed "if" and "elsif" statements when debugging is used. This
3965 helps a great deal to understand what a filter does.
3967 Document more things not specified clearly in RFC3028. I had all this
3968 sorted out, when out of a sudden new issues came to my mind. Oops."
3970 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3973 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3974 canonical form (as documented). However, after a host name lookup from
3975 the IP address, check_host() was doing a simple string comparison with
3976 addresses acquired from the DNS when checking that the found name did
3977 have the original IP as one of its addresses. Since any found IPv6
3978 addresses are likely to be in abbreviated form, the comparison could
3979 fail. Luckily, there already exists a function for doing the comparison
3980 by converting both addresses to binary, so now that is used instead of
3981 the text comparison.
3983 PH/20 There was another similar case to PH/19, when a complete host name was
3984 given in a host list; looking up its IP address could give an abbreviated
3985 form, whereas the current host's name might or might not be abbreviated.
3986 The same fix has been applied.
3992 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3993 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3996 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3997 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3999 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4001 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4002 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4003 Also, for "Auto-Submitted", treat anything other than "no" as
4004 non-personal, in accordance with RFC 3834. (Previously it treated
4005 anything starting "auto-" as non-personal.)
4007 TF/01 The control=submission/name=... option had a problem with syntax
4008 errors if the name included a slash character. The /name= option
4009 now slurps the rest of the string, so it can include any characters
4010 but it must come last in the list of options (after /sender_retain
4013 PH/05 Some modifications to the interface to the fake nameserver for the new
4021 TK/01 Added the "success_on_redirect" address verification option. See
4022 NewStuff for rationale and an example.
4024 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4026 PH/02 Patch to exigrep to allow it to work on syslog lines.
4028 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4029 fread() to skip over the body file's header line, because in Cygwin the
4030 header line is locked and is inaccessible.
4032 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4033 co-exist for some time) to make it clear that it is the Exim ID that is
4034 referenced, not the Message-ID: header line.
4036 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4037 string_format() function, because snprintf() does not exist on all
4040 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4041 ${stat: expansion item.
4043 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4044 protocol synchronization error", to keep the pedants happy.
4046 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4047 well as for IRIX systems, when gcc is being used. See the host.c source
4050 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4052 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4055 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4056 transport and to the smtp transport in LMTP mode.
4058 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4060 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4061 run a filter in a subprocess. This could lead to confusion in subsequent
4062 lookups in the parent process. There should also be a search_tidyup() at
4063 the end of the subprocess.
4065 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4066 only if the host matched helo_try_verify_hosts, which caused the
4067 verification to occur when the EHLO/HELO command was issued. The ACL just
4068 tested the remembered result. Now, if a previous verification attempt has
4069 not happened, "verify = helo" does it there and then.
4071 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4073 TK/03 Fix log output including CR from clamd.
4075 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4076 exist provoked a memory error which could cause a segfault.
4078 PH/15 Installed PCRE 6.2
4080 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4082 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4083 of the problem. Specifically, suggested +O2 rather than +O1 for the
4086 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4088 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4089 record, the port was not correctly logged when the outgoing_port log
4090 selector was set (it logged the transort's default port).
4092 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4093 fallback_hosts, and "hosts" in the smtp transport.
4095 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4096 host errors such as "Connection refused".
4098 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4099 authentication with radiusclient 0.4.9:
4101 - Error returned from rc_read_config was caught wrongly
4102 - Username/password not passed on to radius server due to wrong length.
4104 The presumption is that some radiusclient API changes for 4.51/PH/17
4105 were not taken care of correctly. The code is still untested by me (my
4106 Linux distribution still has 0.3.2 of radiusclient), but it was
4107 contributed by a Radius user.
4109 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4110 expanding the "port" option of the smtp transport.
4112 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4113 while reading a MIME header. Thanks to Tom Hughes for a patch.
4115 PH/24 Include config.h inside local_scan.h so that configuration settings are
4118 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4119 that in an ACL for RCPT (for example), you can examine exactly what was
4122 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4123 commands, but it was not correctly comparing the address with the actual
4124 client host address. Thus, it would show the EHLO address in Received:
4125 header lines when this was not necessary.
4127 PH/27 Added the % operator to ${eval:}.
4129 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4130 it should be ignoring failures (because with -C, for example, it has lost
4131 privilege). It wasn't ignoring creation failures other than "already
4134 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4137 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4138 because an input line was too long, either on its own, or by virtue of
4139 too many continuations, the temporary file was not being removed, and the
4140 return code was incorrect.
4142 PH/31 Missing "BOOL" in function definition in filtertest.c.
4144 PH/32 Applied Sieve patches from the maintainer.
4146 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4148 PH/33 Added "verify = not_blind".
4150 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4151 Local/Makefile (with some defaults set). These are used in built scripts
4152 such as exicyclog, but they have never been used in the exim_install
4153 script (though there are many overriding facilities there). I have
4154 arranged that the exim_install script now takes note of these two
4157 PH/35 Installed configuration files for Dragonfly.
4159 PH/36 When a locally submitted message by a trusted user did not contain a
4160 From: header, and the sender address was obtained from -f or from an SMTP
4161 MAIL command, and the trusted user did not use -F to supply a sender
4162 name, $originator_name was incorrectly used when constructing a From:
4163 header. Furthermore, $originator_name was used for submission mode
4164 messages from external hosts without From: headers in a similar way,
4165 which is clearly wrong.
4167 PH/37 Added control=suppress_local_fixups.
4169 PH/38 When log_selector = +received_sender was set, and the addition of the
4170 sender made the log line's construction buffer exactly full, or one byte
4171 less than full, an overflow happened when the terminating "\n" was
4174 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4175 when the result of a list match is failure because a DNS lookup failed.
4177 PH/40 RM_COMMAND is now used in the building process.
4179 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4180 the "build-* directories that it finds.
4182 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4183 address in a domain literal was a prefix of an interface address.
4185 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4186 when verifying a sender address, unless rewrite_headers is false.
4188 PH/44 Wrote a long comment about why errors_to addresses are verified as
4189 recipients, not senders.
4191 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4192 the ratelimit ACL was added.
4194 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4196 PH/46 Added extra information about PostgreSQL errors to the error string.
4198 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4199 avoiding the need to install special zones in a real server. This is
4200 backwards compatible; if it can't find the fake resolver, it drops back.
4201 Thus, both old and new test suites can be run.
4203 TF/02 Added util/ratelimit.pl
4205 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4206 clock is set back in time.
4208 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4209 Candler <B.Candler@pobox.com>.
4211 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4212 OK for addresses that are the result of redirections.
4214 PH/48 A number of further additions for the benefit of the new test suite,
4215 including a fake gethostbyname() that interfaces to the fake DNS resolver
4218 TF/06 The fix for widen_domains has also been applied to qualify_single and
4219 search_parents which are the other dnslookup options that can cause
4222 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4225 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4227 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4228 service" if it encountered an MX record with an empty target hostname.
4229 The message is now "an MX or SRV record indicated no SMTP service".
4231 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4232 if the DNS of the sending site is misconfigured. This is quite a
4233 common situation. This change restores the behaviour of treating a
4234 helo verification defer as a failure.
4236 PH/51 If self=fail was set on a router, the bounce message did not include the
4237 actual error message.
4243 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4245 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4246 command itself ended in error, the underlying message about the transport
4247 filter timeout was being overwritten with the pipe command error. Now the
4248 underlying error message should be appended to the second error message.
4250 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4252 PH/02 Reduce the amount of output that "make" produces by default. Full output
4253 can still be requested.
4255 PH/03 The warning log line about a condition test deferring for a "warn" verb
4256 was being output only once per connection, rather than after each
4257 occurrence (because it was using the same function as for successful
4258 "warn" verbs). This seems wrong, so I have changed it.
4260 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4261 it should not have, which might have caused a crash in the right
4262 circumstances, but probably never did.
4264 PH/04 Installed a modified version of Tony Finch's patch to make submission
4265 mode fix the return path as well as the Sender: header line, and to
4266 add a /name= option so that you can make the user's friendly name appear
4269 TF/03 Added the control = fakedefer ACL modifier.
4271 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4272 Mark Lowes for thorough testing.
4274 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4276 TK/03 Merged latest SRS patch from Miles Wilton.
4278 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4279 with the definition in sysexits.h (which is #included earlier).
4280 Fortunately, Exim does not actually use EX_OK. The code used to try to
4281 preserve the sysexits.h value, by assuming that macro definitions were
4282 scanned for macro replacements. I have been disabused of this notion,
4283 so now the code just undefines EX_OK before #including unistd.h.
4285 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4286 in the smtp transport. When a block could not be written in a single
4287 write() function, the timeout was being re-applied to each part-write.
4288 This seems wrong - if the receiver was accepting one byte at a time it
4289 would take for ever. The timeout is now adjusted when this happens. It
4290 doesn't have to be particularly precise.
4292 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4293 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4295 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4296 without a domain if the check to <postmaster@domain> fails.
4298 SC/01 Eximstats: added -xls and the ability to specify output files
4299 (patch written by Frank Heydlauf).
4301 SC/02 Eximstats: use FileHandles for outputting results.
4303 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4305 SC/04 Eximstats: fixed display of large numbers with -nvr option
4307 SC/05 Eximstats: fixed merging of reports with empty tables.
4309 SC/06 Eximstats: added the -include_original_destination flag
4311 SC/07 Eximstats: removed tabs and trailing whitespace.
4313 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4315 TK/06 MBOX spool code: Add real "From " MBOX separator line
4316 so the .eml file is really in mbox format (even though
4317 most programs do not really care). Patch from Alex Miller.
4319 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4320 The latter is generated from $received_to and is only set if the
4321 message has one envelope recipient. SA can use these headers,
4322 obviously out-of-the-box. Patch from Alex Miller.
4324 PH/08 The ${def test on a variable was returning false if the variable's
4325 value was "0", contrary to what the specification has always said!
4326 The result should be true unless the variable is empty.
4328 PH/09 The syntax error of a character other than { following "${if
4329 def:variable_name" (after optional whitespace) was not being diagnosed.
4330 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4331 accidental colon was present, for example, could give incorrect results.
4333 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4334 result is used (not including appendfile, where other changes are about
4337 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4338 This involved changing a lot of size variables from int to off_t. It
4339 should work with maildirs and everything.
4341 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4342 spamd dying while we are connected to it.
4344 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4347 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4348 function for BDB 4.3.
4350 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4352 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4353 the sources for PCRE have been re-arranged and more files are now
4356 PH/15 The code I had for printing potentially long long variables in PH/11
4357 above was not the best (it lost precision). The length of off_t variables
4358 is now inspected at build time, and an appropriate printing format (%ld
4359 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4360 to be "long long int" or "long int". This is needed for the internal
4361 formatting function string_vformat().
4363 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4364 the configuration file to be ":syslog", then the script "guesses" where
4365 the logs files are, rather than using the compiled in default. In our
4366 case the guess is not the same as the compiled default, so the script
4367 suddenly stopped working when I started to use syslog. The patch checks
4368 to see if log_file_path is "". If so, it attempts to read it from exim
4369 with no configuration file to get the compiled in version, before it
4370 falls back to the previous guessing code."
4372 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4373 implementing BATV in an Exim configuration. See NewStuff for the gory
4376 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4377 Makefile that are specific to HP-UX.
4379 PH/18 If the "use_postmaster" option was set for a recipient callout together
4380 with the "random" option, the postmaster address was used as the MAIL
4381 FROM address for the random test, but not for the subsequent recipient
4382 test. It is now used for both.
4384 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4385 patch removes a few documentation additions to RFC 3028, because the
4386 latest draft now contains them. It adds the new en;ascii-case comparator
4387 and a new error check for 8bit text in MIME parts. Comparator and
4388 require names are now matched exactly. I enabled the subaddress
4389 extension, but it is not well tested yet (read: it works for me)."
4391 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4392 rework some of the code of TK/09 above to avoid the hardwired use of
4393 "%lld" and "long long". Replaced the call to snprintf() with a call to
4396 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4397 records point to non-existent hosts", "retry timeout exceeded", and
4398 "retry time not reached for any host after a long failure period".
4400 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4401 experimental DomainKeys support:
4403 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4404 (2) On an error such as an illegally used "control", the wrong name for
4405 the control was given.
4407 These problems did NOT occur unless DomainKeys support was compiled.
4409 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4411 PH/24 Added ${if match_ip condition.
4413 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4414 databases so that it will be absolutely obvious if a crash occurs in the
4415 DB library. This is a regular occurrence (often caused by mis-matched
4418 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4419 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4420 picked up on a user's system that detects such things. There doesn't seem
4421 to be a gcc warning option for this - only an attribute that has to be
4422 put on the function's prototype. It seems that in Fedora Core 4 they have
4423 set this on a number of new functions. No doubt there will be more in due
4426 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4427 specify a transport. However, if an address that was verified by such a
4428 router was the subject of a callout, Exim crashed because it tried to
4429 read the rcpt_include_affixes from the non-existent transport. Now it
4430 just assumes that the setting of that option is false. This bug was
4431 introduced by 4.51/PH/31.
4433 PH/28 Changed -d+all to exclude +memory, because that information is very
4434 rarely of interest, but it makes the output a lot bigger. People tend to
4435 do -d+all out of habit.
4437 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4438 code in os-type was giving problems when libc.so lives in lib64, like on
4441 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4442 aren't the modern standard, and it seems that some systems' include files
4443 don't always have them. Exim was already checking for some of the newer
4444 ones like T_AAAA, and defining it itself. I've added checks for all the
4445 record types that Exim uses.
4447 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4448 not automatically generating a new one, as it is supposed to. This
4449 prevented TLS from working. If the file did exist, but contained invalid
4450 data, a new version was generated, as expected. It was only the case of a
4451 non-existent file that was broken.
4453 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4454 with a change in libdomainkeys > 0.64.
4456 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4457 from DNS. If the selector record carries the flag, it now has
4458 precedence over the domain-wide flag.
4460 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4462 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4463 the use of a port name that isn't defined in /etc/services) occurred, the
4464 message was deferred as in a normal delivery, and thus remained on the
4465 spool, instead of being failed because of the mua_wrapper setting. This
4466 is now fixed, and I tidied up some of the mua_wrapper messages at the
4469 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4470 the messages in a hash of arrays rather than using individual hashes.
4471 This is a bit cleaner and results in dramatic memory savings, albeit
4472 at a slight CPU cost.
4474 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4475 as requested by Marc Sherman.
4477 SC/10 Eximstats: added histograms for user specified patterns as requested
4480 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4482 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4483 fopen() in the content-scanning modules that did not already have it.
4489 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4490 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4492 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4494 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4496 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4497 to test Sieve filters that use "vacation".
4499 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4500 that changes the way the GnuTLS parameters are stored in the cache file.
4501 The new format can be generated externally. For backward compatibility,
4502 if the data in the cache doesn't make sense, Exim assumes it has read an
4503 old-format file, and it generates new data and writes a new file. This
4504 means that you can't go back to an older release without removing the
4507 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4508 work if there are any delivery delays because "one_time" forces the
4509 parent to be marked "delivered", so its unseen clone is never tried
4510 again. For this reason, Exim now forbids the simultaneous setting of
4513 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4514 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4515 entry if you want to know the details. The fix, however, neglected to
4516 consider the case when local delivery batching is involved. The test for
4517 "previously delivered" was not happening when checking to see if an
4518 address could be batched with a previous (undelivered) one; under
4519 certain circumstances this could lead to multiple deliveries to the same
4522 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4523 in its include files, and this causes problems building Exim.
4525 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4526 header_syntax) but Exim was just ignoring anything given after a slash.
4527 In particular, this caused confusion with an attempt to use "verify =
4528 reverse_host_lookup/defer_ok". An error is now given when options are
4529 supplied for verify items that do not have them. (Maybe reverse_host_
4530 lookup should have a defer_ok option, but that's a different point.)
4532 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4533 defined by RFC 821) to 2048, because there were problems with some AUTH
4534 commands, and RFC 1869 says the size should be increased for extended
4535 SMTP commands that take arguments.
4537 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4540 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4541 "unknown" error; now it says that the functionality isn't in the binary.
4543 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4544 an address' error message when a string expansion fails (syntax or
4545 whatever). Otherwise the password may appear in the log. Following change
4546 PH/42 below, there is no longer a chance of it appearing in a bounce
4549 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4551 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4552 of its addresses was ever tried. (Bugzilla bug #2.)
4554 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4555 the result incorrectly in the debug output. (It correctly added a newline
4556 to what was transported.)
4558 TF/01 Added $received_time.
4560 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4561 commented out examples of how to interface to a virus scanner and to
4562 SpamAssassin. Also added commented examples of av_scanner and
4563 spamd_address settings.
4565 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4566 and controls are allowed in which ACLs. There were a couple of minor
4567 errors. Some of the entries in the conditions table (which is a table of
4568 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4569 negation of where the condition IS allowed.
4571 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4573 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4574 header file does not have a version number, so I've had to invent a new
4575 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4576 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4577 radiusclient), but it was contributed by a Radius user.
4579 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4580 files or directories, for OpenSSL.
4582 PH/19 When an Exim process that is running as root has to create an Exim log
4583 file, it does so in a subprocess that runs as exim:exim so as to get the
4584 ownership right at creation (otherwise, other Exim processes might see
4585 the file with the wrong ownership). There was no test for failure of this
4586 fork() call, which would lead to the process getting stuck as it waited
4587 for a non-existent subprocess. Forks do occasionally fail when resources
4588 run out. I reviewed all the other calls to fork(); they all seem to check
4591 PH/20 When checking for unexpected SMTP input at connect time (before writing
4592 the banner), Exim was not dealing correctly with a non-positive return
4593 from the read() function. If the client had disconnected by this time,
4594 the result was a log entry for a synchronization error with an empty
4595 string after "input=" when read() returned zero. If read() returned -1
4596 (an event I could not check), uninitialized data bytes were printed.
4597 There were reports of junk text (parts of files, etc) appearing after
4600 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4602 PH/22 Added support for macro redefinition, and (re)definition in between
4603 driver and ACL definitions.
4605 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4606 forgetting to use the resulting value; it was using the unexpanded value.
4608 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4609 hadn't been configured. The fix is from Juergen Kreileder, who
4610 understands it better than I do:
4612 "Here's what I see happening with three configured cyrus_sasl
4613 authenticators configured (plain, login, cram-md5):
4615 On startup auth_cyrus_sasl_init() gets called for each of these.
4616 This means three calls to sasl_listmech() without a specified mech_list.
4617 => SASL tests which mechs of all available mechs actually work
4618 => three warnings about OTP not working
4619 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4621 With the patch, sasl_listmech() also gets called three times. But now
4622 SASL's mech_list option is set to the server_mech specified in the the
4623 authenticator. Or in other words, the answer from sasl_listmech()
4624 gets limited to just the mech you're testing for (which is different
4626 => the return list contains just 'plain' or 'login', 'cram-md5' or
4627 nothing depending on the value of ob->server_mech.
4629 I've just tested the patch: Authentication still works fine,
4630 unavailable mechs specified in the exim configuration are still
4631 caught, and the auth.log warnings about OTP are gone."
4633 PH/25 When debugging is enabled, the contents of the command line are added
4634 to the debugging output, even when log_selector=+arguments is not
4637 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4638 answer is "GNU", and only if the return is "GNU/something" is the answer
4641 PH/27 $acl_verify_message is now set immediately after the failure of a
4642 verification in an ACL, and so is available in subsequent modifiers. In
4643 particular, the message can be preserved by coding like this:
4645 warn !verify = sender
4646 set acl_m0 = $acl_verify_message
4648 Previously, $acl_verify_message was set only while expanding "message"
4649 and "log_message" when a very denied access.
4651 PH/28 Modified OS/os.c-Linux with
4653 -#ifndef OS_LOAD_AVERAGE
4654 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4656 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4657 nomenclature these days.)
4659 PH/29 Installed patch from the Sieve maintainer that adds the options
4660 sieve_useraddress and sieve_subaddress to the redirect router.
4662 PH/30 In these circumstances:
4663 . Two addresses routed to the same list of hosts;
4664 . First host does not offer TLS;
4665 . First host accepts first address;
4666 . First host gives temporary error to second address;
4667 . Second host offers TLS and a TLS session is established;
4668 . Second host accepts second address.
4669 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4670 and peerdn, if requested) that were in fact used only for the second
4673 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4674 attention to any local part prefix or suffix that was matched by the
4675 router that accepted the address. It now behaves in the same way as it
4676 does for delivery: the affixes are removed from the local part unless
4677 rcpt_include_affixes is set on the transport.
4679 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4680 timeout during the DATA phase of an incoming message.
4682 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4683 applied a patch sanctioned by the Sieve maintainer.
4685 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4686 the uid or gid is negative. A case of a negative gid caused this to be
4687 noticed. The fix allows for either to be negative.
4689 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4690 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4693 PH/36 The change PH/12 above was broken. Fixed it.
4695 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4696 the grounds that routing the same address twice would always produce the
4697 same answer. This might have been true once, but it is certainly no
4698 longer true now. Routing a child address may depend on the previous
4699 routing that produced that child. Some complicated redirection strategies
4700 went wrong when messages had multiple recipients, and made Exim's
4701 behaviour dependent on the order in which the addresses were given.
4703 I have moved the duplicate checking until after the routing is complete.
4704 Exim scans the addresses that are assigned to local and remote
4705 transports, and removes any duplicates. This means that more work will be
4706 done, as duplicates will always all be routed, but duplicates are
4707 presumably rare, so I don't expect this is of any significance.
4709 For deliveries to pipes, files, and autoreplies, the duplicate checking
4710 still happens during the routing process, since they are not going to be
4713 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4714 It corrects a timeout issue with spamd. This is Ian's comment: "The
4715 background is that sometimes spamd either never reads data from a
4716 connection it has accepted, or it never writes response data. The exiscan
4717 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4718 blindly assumes that writes won't block so it may never time out."
4720 PH/39 Allow G after quota size as well as K and M.
4722 PH/40 The value set for $authenticated_id in an authenticator may not contain
4723 binary zeroes or newlines because the value is written to log lines and
4724 to spool files. There was no check on this. Now the value is run through
4725 the string_printing() function so that such characters are converted to
4726 printable escape sequences.
4728 PH/41 $message_linecount is a new variable that contains the total number of
4729 lines in the message. Compare $body_linecount, which is the count for the
4732 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4733 bounce and delay warning messages, except in certain special cases, which
4736 (a) An SMTP error message from a remote host;
4737 (b) A message specified in a :fail: redirection;
4738 (c) A message specified in a "fail" command in a system filter;
4739 (d) A message specified in a FAIL return from the queryprogram router;
4740 (e) A message specified by the cannot_route_message router option.
4742 In these cases only, Exim does include the error details in bounce and
4743 warning messages. There are also a few cases where bland messages such
4744 as "unrouteable address" or "local delivery error" are given.
4746 PH/43 $value is now also set for the "else" part of a ${run expansion.
4748 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4749 being worked on, but at least Exim now implements the latest version to
4752 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4753 process to complete was treated as a delivery failure, a timeout while
4754 writing the message to the pipe was logged, but erroneously treated as a
4755 successful delivery. Such timeouts include transport filter timeouts. For
4756 consistency with the overall process timeout, these timeouts are now
4757 treated as errors, giving rise to delivery failures by default. However,
4758 there is now a new Boolean option for the pipe transport called
4759 timeout_defer, which, if set TRUE, converts the failures into defers for
4760 both kinds of timeout. A transport filter timeout is now identified in
4763 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4764 systems where "make" and "gmake" are different, calling "gmake" at top
4765 level broke things. I've arranged for the value of $(MAKE) to be passed
4766 from the Makefile to this script so that it can call the same version of
4770 A note about Exim versions 4.44 and 4.50
4771 ----------------------------------------
4773 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4774 changes of various kinds. As a consequence, a big documentation update was
4775 needed. This delayed the release for rather longer than seemed good, especially
4776 in the light of a couple of (minor) security issues. Therefore, the changes
4777 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4778 release. So 4.44 and 4.50 are in effect two different branches that both start
4781 I have left the 4.50 change log unchanged; it contains all the changes since
4782 4.43. The change log for 4.44 is below; many of its items are identical to
4783 those for 4.50. This seems to be the most sensible way to preserve the
4784 historical information.
4790 1. Minor wording change to the doc/README.SIEVE file.
4792 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4793 computation of the current number of files was incorrect.
4795 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4796 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4799 4. Give more explanation in the error message when the command for a transport
4800 filter fails to execute.
4802 5. There are several places where Exim runs a non-Exim command in a
4803 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4804 was being done only for the command run by the queryprogram router. It is
4805 now done for all such subprocesses. The other cases are: ${run, transport
4806 filters, and the commands run by the lmtp and pipe transports.
4808 6. Added CONFIGURE_GROUP build-time option.
4810 7. Some older OS have a limit of 256 on the maximum number of file
4811 descriptors. Exim was using setrlimit() to set 1000 as a large value
4812 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4813 systems. I've change it so that if it can't get 1000, it tries for 256.
4815 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4816 was an oversight, and furthermore, ever since the addition of extra
4817 controls (e.g. 4.43/32), the checks on when to allow different forms of
4818 "control" were broken. There should now be diagnostics for all cases when a
4819 control that does not make sense is encountered.
4821 9. Added the /retain_sender option to "control=submission".
4823 10. $recipients is now available in the predata ACL (oversight).
4825 11. Tidy the search cache before the fork to do a delivery from a message
4826 received from the command line. Otherwise the child will trigger a lookup
4827 failure and thereby defer the delivery if it tries to use (for example) a
4828 cached ldap connection that the parent has called unbind on.
4830 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4831 of $address_data from the recipient verification was clobbered by the
4832 sender verification.
4834 13. The value of address_data from a sender verification is now available in
4835 $sender_address_data in subsequent conditions in the ACL statement.
4837 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4839 15. Added a new option "connect=<time>" to callout options, to set a different
4842 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4843 was its contents. (It was OK if the option was not defined at all.)
4845 17. A "Completed" log line is now written for messages that are removed from
4846 the spool by the -Mrm option.
4848 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4849 information about exactly what failed.
4851 19. Added -dd to debug only the daemon process.
4853 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4854 handles timeouts, both on the server side and network timeouts. Renamed the
4855 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4857 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4858 It is now set to "smtps".
4860 22. $host_address is now set to the target address during the checking of
4861 ignore_target_hosts.
4863 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4864 being passed; this would have caused $sender_host_name to have been used if
4865 matching the list had actually called for a host name (not very likely,
4866 since this list is usually IP addresses). A host name is now passed as
4869 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4870 code that specifies a non-restarting handler (typically sigaction() in
4871 modern systems) in an attempt to fix a rare and obscure crash bug.
4873 25. Narrowed the window for a race in the daemon that could cause it to ignore
4874 SIGCHLD signals. This is not a major problem, because they are used only to
4875 wake it up if nothing else does.
4877 26. A malformed maildirsize file could cause Exim to calculate negative values
4878 for the mailbox size or file count. Odd effects could occur as a result.
4879 The maildirsize information is now recalculated if the size or filecount
4882 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4883 support for a long time. Removed HAVE_SYS_VFS_H.
4885 28. Installed the latest version of exipick from John Jetmore.
4887 29. In an address list, if the pattern was not a regular expression, an empty
4888 subject address (from a bounce message) matched only if the pattern was an
4889 empty string. Non-empty patterns were not even tested. This was the wrong
4890 because it is perfectly reasonable to use an empty address as part of a
4891 database query. An empty address is now tested by patterns that are
4892 lookups. However, all the other forms of pattern expect the subject to
4893 contain a local part and a domain, and therefore, for them, an empty
4894 address still always fails if the pattern is not itself empty.
4896 30. Exim went into a mad DNS loop when attempting to do a callout where the
4897 host was specified on an smtp transport, and looking it up yielded more
4898 than one IP address.
4900 31. Re-factored the code for checking spool and log partition space into a
4901 function that finds that data and another that does the check. The former
4902 is then used to implement four new variables: $spool_space, $log_space,
4903 $spool_inodes, and $log_inodes.
4905 32. The RFC2047 encoding function was originally intended for short strings
4906 such as real names; it was not keeping to the 75-character limit for
4907 encoded words that the RFC imposes. It now respects the limit, and
4908 generates multiple encoded words if necessary. To be on the safe side, I
4909 have increased the buffer size for the ${rfc2047: expansion operator from
4912 33. It is now permitted to omit both strings after an "if" condition; if the
4913 condition is true, the result is "true". As before, when the second string
4914 is omitted, a false condition yields an empty string. This makes it less
4915 cumbersome to write custom ACL and router conditions.
4917 34. Failure to deliver a bounce message always caused it to be frozen, even if
4918 there was an errors_to setting on the router. The errors_to setting is now
4921 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4922 canonical form (fully expanded) before being placed in
4923 $sender_host_address.
4925 36. The table in the code that translates DNS record types into text (T_A to
4926 "A" for instance) was missing entries for NS and CNAME. It is just possible
4927 that this could have caused confusion if both these types were looked up
4928 for the same domain, because the text type is used as part of Exim's
4929 per-process caching. But the chance of anyone hitting this buglet seems
4932 37. The dnsdb lookup has been extended in a number of ways.
4934 (1) There is a new type, "zns", which walks up the domain tree until it
4935 finds some nameserver records. It should be used with care.
4937 (2) There is a new type, "mxh", which is like "mx" except that it returns
4938 just the host names, not the priorities.
4940 (3) It is now possible to give a list of domains (or IP addresses) to be
4941 looked up. The behaviour when one of the lookups defers can be
4942 controlled by a keyword.
4944 (4) It is now possible to specify the separator character for use when
4945 multiple records are returned.
4947 38. The dnslists ACL condition has been extended: it is now possible to supply
4948 a list of IP addresses and/or domains to be looked up in a particular DNS
4951 39. Added log_selector=+queue_time_overall.
4953 40. When running the queue in the test harness, wait just a tad after forking a
4954 delivery process, to get repeatability of debugging output.
4956 41. Include certificate and key file names in error message when GnuTLS fails
4957 to set them up, because the GnuTLS error message doesn't include the name
4958 of the failing file when there is a problem reading it.
4960 42. Allow both -bf and -bF in the same test run.
4962 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4964 44. The "Exiscan patch" is now merged into the mainline Exim source.
4966 45. Sometimes the final signoff response after QUIT could fail to get
4967 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4968 < 0 before doing a fflush(). This bug looks as though it goes back to the
4969 introduction of TLS in release 3.20, but "sometimes" must have been rare
4970 because the tests only now provoked it.
4972 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4973 (this can affect the format of dates).
4975 47. exim_tidydb, when checking for the continued existence of a message for
4976 which it has found a message-specific retry record, was not finding
4977 messages that were in split spool directories. Consequently, it was
4978 deleting retry records that should have stayed in existence.
4980 48. Steve fixed some bugs in eximstats.
4982 49. The SPA authentication driver was not abandoning authentication and moving
4983 on to the next authenticator when an expansion was forced to fail,
4984 contradicting the general specification for all authenticators. Instead it
4985 was generating a temporary error. It now behaves as specified.
4987 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4988 (the order specifies the preference for clients). The order is now AES256,
4989 AES128, 3DES, ARCFOUR128.
4991 51. Small patch to Sieve code - explicitly set From: when generating an
4994 52. Exim crashed if a remote delivery caused a very long error message to be
4995 recorded - for instance if somebody sent an entire SpamAssassin report back
4996 as a large number of 550 error lines. This bug was coincidentally fixed by
4997 increasing the size of one of Exim's internal buffers (big_buffer) that
4998 happened as part of the Exiscan merge. However, to be on the safe side, I
4999 have made the code more robust (and fixed the comments that describe what
5002 53. Now that there can be additional text after "Completed" in log lines (if
5003 the queue_time_overall log selector is set), a one-byte patch to exigrep
5004 was needed to allow it to recognize "Completed" as not the last thing in
5007 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5008 patch that reportedly fixes this has been added. I am not expert enough to
5009 create a test for it. This is what the patch creator wrote:
5011 "I found a little strange behaviour of ldap code when working with
5012 Windows 2003 AD Domain, where users was placed in more than one
5013 Organization Units. When I tried to give exim partial DN, the exit code
5014 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5015 But simultaneously result of request was absolutely normal ldap result,
5016 so I produce this patch..."
5018 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5019 REFERENCE, so I have modified the code to exclude the patch when that macro
5022 55. Some experimental protocols are using DNS PTR records for new purposes. The
5023 keys for these records are domain names, not reversed IP addresses. The
5024 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5025 leaves it alone. Component reversal etc. now happens only for IP addresses.
5028 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5030 57. Double the size of the debug message buffer (to 2048) so that more of very
5031 long debug lines gets shown.
5033 58. The exicyclog utility now does better if the number of log files to keep
5034 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5036 59. Two changes related to the smtp_active_hostname option:
5038 (1) $smtp_active_hostname is now available as a variable.
5039 (2) The default for smtp_banner uses $smtp_active_hostname instead
5040 of $primary_hostname.
5042 60. The host_aton() function is supposed to be passed a string that is known
5043 to be a valid IP address. However, in the case of IPv6 addresses, it was
5044 not checking this. This is a hostage to fortune. Exim now panics and dies
5045 if the condition is not met. A case was found where this could be provoked
5046 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5047 components; fortuitously, this particular loophole had already been fixed
5048 by change 4.50/55 above.
5050 If there are any other similar loopholes, the new check in host_aton()
5051 itself should stop them being exploited. The report I received stated that
5052 data on the command line could provoke the exploit when Exim was running as
5053 exim, but did not say which command line option was involved. All I could
5054 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5055 running as the user.
5058 61. There was a buffer overflow vulnerability in the SPA authentication code
5059 (which came originally from the Samba project). I have added a test to the
5060 spa_base64_to_bits() function which I hope fixes it.
5063 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5064 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5066 63. The daemon start-up calls getloadavg() while still root for those OS that
5067 need the first call to be done as root, but it missed one case: when
5068 deliver_queue_load_max is set with deliver_drop_privilege. This is
5069 necessary for the benefit of the queue runner, because there is no re-exec
5070 when deliver_drop_privilege is set.
5072 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5073 This has been fixed.
5075 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5076 was in use, was not putting the data itself into the right store pool;
5077 consequently, it could be overwritten for a subsequent message in the same
5078 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5081 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5083 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5084 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5085 the function were treating the return as a boolean value, which happened to
5086 work because 0=false and not-0=true, but is not correct code.
5088 68. The host_aton() function was not handling scoped IPv6 addresses (those
5089 with, for example, "%eth0" on the end) correctly.
5091 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5092 negated items (that is, ~something) in unsigned ints. Some compilers
5093 apparently mutter when there is no cast.
5095 70. If an address verification called from an ACL failed, and did not produce a
5096 user-specific message (i.e. there was only a "system" message), nothing was
5097 put in $acl_verify_message. In this situation, it now puts the system
5100 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5101 session; change 4.31/43 added the unwanted input to the log line - except
5102 that it did not do this in the start of session case. It now does.
5104 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5105 This is wrong and can cause the other end to generate a synchronization
5106 error if it is another Exim or anything else that does the synchronization
5107 check. A QUIT command is no longer sent after a timeout.
5109 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5110 during host lookups.
5112 74. The defer_ok option of callout verification was not working if it was used
5113 when verifying addresses in header lines, that is, for this case:
5115 verify = header_sender/callout=defer_ok
5117 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5118 those file descriptors could be used for SMTP connections. If anything
5119 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5120 could be sent to the SMTP client, causing chaos. The daemon now opens
5121 stdin, stdout, and stderr to /dev/null when it puts itself into the
5124 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5125 log by default. The user can override this with suitable Perl magic.
5127 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5128 the log message when discard triggers, was not working for the DATA ACL or
5129 for the non-SMTP ACL.
5131 78. Error message wording change in sieve.c.
5133 79. If smtp_accept_max_per_host was set, the number of connections could be
5134 restricted to fewer than expected, because the daemon was trying to set up
5135 a new connection before checking whether the processes handling previous
5136 connections had finished. The check for completed processes is now done
5137 earlier. On busy systems, this bug wouldn't be noticed because something
5138 else would have woken the daemon, and it would have reaped the completed
5141 80. If a message was submitted locally by a user whose login name contained one
5142 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5143 It caused a spool format error. I have fixed the spool reading code. A
5144 related problem was that the "from" clause in the Received: line became
5145 illegal because of the space(s). It is now covered by ${quote_local_part.
5147 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5150 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5152 83. Patch from Sieve maintainer to fix unterminated string problem in
5153 "vacation" handling.
5155 84. Some minor changes to the Linux configuration files to help with other
5156 OS variants using glibc.
5158 85. One more patch for Sieve to update vacation handling to latest spec.
5161 ----------------------------------------------------
5162 See the note above about the 4.44 and 4.50 releases.
5163 ----------------------------------------------------
5169 1. Change 4.43/35 introduced a bug that caused file counts to be
5170 incorrectly computed when quota_filecount was set in an appendfile
5173 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5174 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5177 3. Give more explanation in the error message when the command for a transport
5178 filter fails to execute.
5180 4. There are several places where Exim runs a non-Exim command in a
5181 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5182 was being done only for the command run by the queryprogram router. It is
5183 now done for all such subprocesses. The other cases are: ${run, transport
5184 filters, and the commands run by the lmtp and pipe transports.
5186 5. Some older OS have a limit of 256 on the maximum number of file
5187 descriptors. Exim was using setrlimit() to set 1000 as a large value
5188 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5189 systems. I've change it so that if it can't get 1000, it tries for 256.
5191 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5192 was an oversight, and furthermore, ever since the addition of extra
5193 controls (e.g. 4.43/32), the checks on when to allow different forms of
5194 "control" were broken. There should now be diagnostics for all cases when a
5195 control that does not make sense is encountered.
5197 7. $recipients is now available in the predata ACL (oversight).
5199 8. Tidy the search cache before the fork to do a delivery from a message
5200 received from the command line. Otherwise the child will trigger a lookup
5201 failure and thereby defer the delivery if it tries to use (for example) a
5202 cached ldap connection that the parent has called unbind on.
5204 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5205 of $address_data from the recipient verification was clobbered by the
5206 sender verification.
5208 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5209 was its contents. (It was OK if the option was not defined at all.)
5211 11. A "Completed" log line is now written for messages that are removed from
5212 the spool by the -Mrm option.
5214 12. $host_address is now set to the target address during the checking of
5215 ignore_target_hosts.
5217 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5218 being passed; this would have caused $sender_host_name to have been used if
5219 matching the list had actually called for a host name (not very likely,
5220 since this list is usually IP addresses). A host name is now passed as
5223 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5224 code that specifies a non-restarting handler (typically sigaction() in
5225 modern systems) in an attempt to fix a rare and obscure crash bug.
5227 15. Narrowed the window for a race in the daemon that could cause it to ignore
5228 SIGCHLD signals. This is not a major problem, because they are used only to
5229 wake it up if nothing else does.
5231 16. A malformed maildirsize file could cause Exim to calculate negative values
5232 for the mailbox size or file count. Odd effects could occur as a result.
5233 The maildirsize information is now recalculated if the size or filecount
5236 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5237 support for a long time. Removed HAVE_SYS_VFS_H.
5239 18. Updated exipick to current release from John Jetmore.
5241 19. Allow an empty sender to be matched against a lookup in an address list.
5242 Previously the only cases considered were a regular expression, or an
5245 20. Exim went into a mad DNS lookup loop when doing a callout where the
5246 host was specified on the transport, if the DNS lookup yielded more than
5249 21. The RFC2047 encoding function was originally intended for short strings
5250 such as real names; it was not keeping to the 75-character limit for
5251 encoded words that the RFC imposes. It now respects the limit, and
5252 generates multiple encoded words if necessary. To be on the safe side, I
5253 have increased the buffer size for the ${rfc2047: expansion operator from
5256 22. Failure to deliver a bounce message always caused it to be frozen, even if
5257 there was an errors_to setting on the router. The errors_to setting is now
5260 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5261 canonical form (fully expanded) before being placed in
5262 $sender_host_address.
5264 24. Updated eximstats to version 1.33
5266 25. Include certificate and key file names in error message when GnuTLS fails
5267 to set them up, because the GnuTLS error message doesn't include the name
5268 of the failing file when there is a problem reading it.
5270 26. Expand error message when OpenSSL has problems setting up cert/key files.
5273 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5274 (this can affect the format of dates).
5276 28. exim_tidydb, when checking for the continued existence of a message for
5277 which it has found a message-specific retry record, was not finding
5278 messages that were in split spool directories. Consequently, it was
5279 deleting retry records that should have stayed in existence.
5281 29. eximstats updated to version 1.35
5282 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5283 1.35 - bugfix such that pie charts by volume are generated correctly
5285 30. The SPA authentication driver was not abandoning authentication and moving
5286 on to the next authenticator when an expansion was forced to fail,
5287 contradicting the general specification for all authenticators. Instead it
5288 was generating a temporary error. It now behaves as specified.
5290 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5291 (the order specifies the preference for clients). The order is now AES256,
5292 AES128, 3DES, ARCFOUR128.
5294 31. Small patch to Sieve code - explicitly set From: when generating an
5297 32. Exim crashed if a remote delivery caused a very long error message to be
5298 recorded - for instance if somebody sent an entire SpamAssassin report back
5299 as a large number of 550 error lines. This bug was coincidentally fixed by
5300 increasing the size of one of Exim's internal buffers (big_buffer) that
5301 happened as part of the Exiscan merge. However, to be on the safe side, I
5302 have made the code more robust (and fixed the comments that describe what
5305 33. Some experimental protocols are using DNS PTR records for new purposes. The
5306 keys for these records are domain names, not reversed IP addresses. The
5307 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5308 leaves it alone. Component reversal etc. now happens only for IP addresses.
5311 34. The host_aton() function is supposed to be passed a string that is known
5312 to be a valid IP address. However, in the case of IPv6 addresses, it was
5313 not checking this. This is a hostage to fortune. Exim now panics and dies
5314 if the condition is not met. A case was found where this could be provoked
5315 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5316 components; fortuitously, this particular loophole had already been fixed
5317 by change 4.50/55 or 4.44/33 above.
5319 If there are any other similar loopholes, the new check in host_aton()
5320 itself should stop them being exploited. The report I received stated that
5321 data on the command line could provoke the exploit when Exim was running as
5322 exim, but did not say which command line option was involved. All I could
5323 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5324 running as the user.
5327 35. There was a buffer overflow vulnerability in the SPA authentication code
5328 (which came originally from the Samba project). I have added a test to the
5329 spa_base64_to_bits() function which I hope fixes it.
5332 36. The daemon start-up calls getloadavg() while still root for those OS that
5333 need the first call to be done as root, but it missed one case: when
5334 deliver_queue_load_max is set with deliver_drop_privilege. This is
5335 necessary for the benefit of the queue runner, because there is no re-exec
5336 when deliver_drop_privilege is set.
5338 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5339 was in use, was not putting the data itself into the right store pool;
5340 consequently, it could be overwritten for a subsequent message in the same
5341 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5344 38. Sometimes the final signoff response after QUIT could fail to get
5345 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5346 < 0 before doing a fflush(). This bug looks as though it goes back to the
5347 introduction of TLS in release 3.20, but "sometimes" must have been rare
5348 because the tests only now provoked it.
5354 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5355 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5356 Now it returns an integer. A number of calls were still expecting a T/F
5357 return. Fortuitously, in all cases, the tests worked in OK situations,
5358 which is the norm. However, things would have gone wrong on any write
5359 failures on the smtp file descriptor. This function is used when sending
5360 messages over SMTP and also when doing verify callouts.
5362 2. When Exim is called to do synchronous delivery of a locally submitted
5363 message (the -odf or -odi options), it no longer closes stderr before doing
5366 3. Implemented the mua_wrapper option.
5368 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5370 5. Implemented the functions header_remove(), header_testname(),
5371 header_add_at_position(), and receive_remove_recipient(), and exported them
5374 6. If an ACL "warn" statement specified the addition of headers, Exim already
5375 inserted X-ACL-Warn: at the start if there was no header name. However, it
5376 was not making this test for the second and subsequent header lines if
5377 there were newlines in the string. This meant that an invalid header could
5378 be inserted if Exim was badly configured.
5380 7. Allow an ACL "warn" statement to add header lines at the start or after all
5381 the Received: headers, as well as at the end.
5383 8. Added the rcpt_4xx retry error code.
5385 9. Added postmaster_mailfrom=xxx to callout verification option.
5387 10. Added mailfrom=xxxx to the callout verification option, for verify=
5390 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5391 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5393 12. Inserted some casts to stop certain compilers warning when using pointer
5394 differences as field lengths or precisions in printf-type calls (mostly
5395 affecting debugging statements).
5397 13. Added optional readline() support for -be (dynamically loaded).
5399 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5400 same clock tick as a message's arrival, so that its received time was the
5401 same as the "first fail" time on the retry record, and that message
5402 remained on the queue past the ultimate address timeout, every queue runner
5403 would try a delivery (because it was past the ultimate address timeout) but
5404 after another failure, the ultimate address timeout, which should have then
5405 bounced the address, did not kick in. This was a "< instead of <=" error;
5406 in most cases the first failure would have been in the next clock tick
5407 after the received time, and all would be well.
5409 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5410 being recognized when the domain list was tested by the match_domain
5411 condition in an expansion string.
5413 16. Added the ${str2b64: operator.
5415 17. Exim was always calling setrlimit() to set a large limit for the number of
5416 processes, without checking whether the existing limit was already
5417 adequate. (It did check for the limit on file descriptors.) Furthermore,
5418 errors from getrlimit() and setrlimit() were being ignored. Now they are
5419 logged to the main and panic logs, but Exim does carry on, to try to do its
5420 job under whatever limits there are.
5422 18. Imported PCRE 5.0.
5424 19. Trivial typo in log message " temporarily refused connection" (the leading
5427 20. If the log selector return_path_on_delivery was set and an address was
5428 redirected to /dev/null, the delivery process crashed because it assumed
5429 that a return path would always be set for a "successful" delivery. In this
5430 case, the whole delivery is bypassed as an optimization, and therefore no
5433 21. Internal re-arrangement: the function for sending a challenge and reading
5434 a response while authentication was assuming a zero-terminated challenge
5435 string. It's now changed to take a pointer and a length, to allow for
5436 binary data in such strings.
5438 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5440 23. Exim was not respecting finduser_retries when seeking the login of the
5441 uid under which it was called; it was always trying 10 times. (The default
5442 setting of finduser_retries is zero.) Also, it was sleeping after the final
5443 failure, which is pointless.
5445 24. Implemented tls_on_connect_ports.
5447 25. Implemented acl_smtp_predata.
5449 26. If the domain in control=submission is set empty, Exim assumes that the
5450 authenticated id is a complete email address when it generates From: or
5451 Sender: header lines.
5453 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5454 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5455 chown and chgrp in /bin and hostname in /usr/bin.
5457 28. Exim was keeping the "process log" file open after each use, just as it
5458 does for the main log. This opens the possibility of it remaining open for
5459 long periods when the USR1 signal hits a daemon. Occasional processlog
5460 errors were reported, that could have been caused by this. Anyway, it seems
5461 much more sensible not to leave this file open at all, so that is what now
5464 29. The long-running daemon process does not normally write to the log once it
5465 has entered its main loop, and it closes the log before doing so. This is
5466 so that log files can straightforwardly be renamed and moved. However,
5467 there are a couple of unusual error situations where the daemon does write
5468 log entries, and I had neglected to close the log afterwards.
5470 30. The text of an SMTP error response that was received during a remote
5471 delivery was being truncated at 512 bytes. This is too short for some of
5472 the long messages that one sometimes sees. I've increased the limit to
5475 31. It is now possible to make retry rules that apply only when a message has a
5476 specific sender, in particular, an empty sender.
5478 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5479 it possible to be selective about when SMTP synchronization is enforced.
5481 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5483 32. Implemented hosts_connection_nolog.
5485 33. Added an ACL for QUIT.
5487 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5490 35. Added mailbox_size and mailbox_filecount to appendfile.
5492 36. Added control = no_multiline_responses to ACLs.
5494 37. There was a bug in the logic of the code that waits for the clock to tick
5495 in the case where the clock went backwards by a substantial amount such
5496 that the microsecond fraction of "now" was more than the microsecond
5497 fraction of "then" (but the whole seconds number was less).
5499 38. Added support for the libradius Radius client library this is found on
5500 FreeBSD (previously only the radiusclient library was supported).
5506 1. When certain lookups returned multiple values in the form name=value, the
5507 quoting of the values was not always being done properly. Specifically:
5508 (a) If the value started with a double quote, but contained no whitespace,
5510 (b) If the value contained whitespace other than a space character (i.e.
5511 tabs or newlines or carriage returns) it was not quoted.
5512 This fix has been applied to the mysql and pgsql lookups by writing a
5513 separate quoting function and calling it from the lookup code. The fix
5514 should probably also be applied to nisplus, ibase and oracle lookups, but
5515 since I cannot test any of those, I have not disturbed their existing code.
5517 2. A hit in the callout cache for a specific address caused a log line with no
5518 reason for rejecting RCPT. Now it says "Previous (cached) callout
5519 verification failure".
5521 3. There was an off-by-one bug in the queryprogram router. An over-long
5522 return line was truncated at 256 instead of 255 characters, thereby
5523 overflowing its buffer with the terminating zero. As well as fixing this, I
5524 have increased the buffer size to 1024 (and made a note to document this).
5526 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5527 when Exim is waiting for an SMTP response from a remote server, Exim
5528 restarts its select() call on the socket, thereby resetting its timeout.
5529 This is not a problem when such interrupts are rare. Somebody set up a cron
5530 job to run exiwhat every 2 minutes, which is less than the normal select()
5531 timeout (5 or 10 minutes). This meant that the select() timeout never
5532 kicked in because it was always reset. I have fixed this by comparing the
5533 time when an interrupt arrives with the time at the start of the first call
5534 to select(). If more time than the timeout has elapsed, the interrupt is
5535 treated as a timeout.
5537 5. Some internal re-factoring in preparation for the addition of Sieve
5538 extensions (by MH). In particular, the "personal" test is moved to a
5539 separate function, and given an option for scanning Cc: and Bcc: (which is
5540 not set for Exim filters).
5542 6. When Exim created an email address using the login of the caller as the
5543 local part (e.g. when creating a From: or Sender: header line), it was not
5544 quoting the local part when it contained special characters such as @.
5546 7. Installed new OpenBSD configuration files.
5548 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5549 try to make them clearer.
5551 9. Callout options, other than the timeout value, were being ignored when
5552 verifying sender addresses in header lines. For example, when using
5554 verify = header_sender/callout=no_cache
5556 the cache was (incorrectly) being used.
5558 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5559 only the Cygwin environment.
5561 11. When return_path_on_delivery was set as a log selector, if different remote
5562 addresses in the same message used different return paths and parallel
5563 remote delivery occurred, the wrong values would sometimes be logged.
5564 (Whenever a remote delivery process finished, the return path value from
5565 the most recently started remote delivery process was logged.)
5567 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5568 lines when AUTH and/or TLS are in use. This is the "received protocol"
5569 field. Exim used to use "asmtp" for authenticated SMTP, without any
5570 indication (in the protocol name) for TLS use. Now it follows the RFC and
5571 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5572 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5573 names appear in log lines as well as in Received: header lines.
5575 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5576 extensions, and comparison tests, and to fix some bugs.
5578 14. Changes to the "personal" filter test:
5580 (1) The test was buggy in that it was just doing the equivalent of
5581 "contains" tests on header lines. For example, if a user's address was
5582 anne@some.where, the "personal" test would incorrectly be true for
5584 To: susanne@some.where
5586 This test is now done by extracting each address from the header in turn,
5587 and checking the entire address. Other tests that are part of "personal"
5588 are now done using regular expressions (for example, to check local parts
5589 of addresses in From: header lines).
5591 (2) The list of non-personal local parts in From: addresses has been
5592 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5593 taken from the Sieve specification recommendations.
5595 (3) If the message contains any header line starting with "List-" it is
5596 treated as non-personal.
5598 (4) The test for "circular" in the Subject: header line has been removed
5599 because it now seems ill-conceived.
5601 15. Minor typos in src/EDITME comments corrected.
5603 16. Installed latest exipick from John Jetmore.
5605 17. If headers_add on a router specified a text string that was too long for
5606 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5607 of string_sprintf() is now avoided.
5609 18. $message_body_size was not set (it was always zero) when running the DATA
5610 ACL and the local_scan() function.
5612 19. For the "mail" command in an Exim filter, no default was being set for
5613 the once_repeat time, causing a random time value to be used if "once" was
5614 specified. (If the value happened to be <= 0, no repeat happened.) The
5615 default is now 0s, meaning "never repeat". The "vacation" command was OK
5616 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5617 (I found it when inspecting the code).
5619 20. There is now an overall timeout for performing a callout verification. It
5620 defaults to 4 times the callout timeout, which applies to individual SMTP
5621 commands during the callout. The overall timeout applies when there is more
5622 than one host that can be tried. The timeout is checked before trying the
5623 next host. This prevents very long delays if there are a large number of
5624 hosts and all are timing out (e.g. when the network connections are timing
5625 out). The value of the overall timeout can be changed by specifying an
5626 additional sub-option for "callout", called "maxwait". For example:
5628 verify = sender/callout=5s,maxwait=20s
5630 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5631 to the end before writing, but this should make it even safer).
5633 22. Exim was forgetting that it had advertised PIPELINING for the second and
5634 subsequent messages on an SMTP connection. It was also not resetting its
5635 memory on STARTTLS and an internal HELO.
5637 23. When Exim logs an SMTP synchronization error within a session, it now
5638 records whether PIPELINING has been advertised or not.
5640 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5641 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5642 rather than long int.
5644 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5646 26. Added the never_mail option to autoreply.
5652 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5653 crash if the getsockname() call failed; this can happen if a connection is
5654 closed very soon after it is established. The problem was simply in the
5655 order in which certain operations were done, causing Exim to try to write
5656 to the SMTP stream before it had set up the file descriptor. The bug has
5657 been fixed by making things happen in the correct order.
5663 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5664 before the connection was closed, thus losing the rejection response.
5666 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5667 some early Solaris releases, but causes trouble in current releases where
5668 socklen_t is defined.
5670 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5673 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5676 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5677 that releasing the top of it at the end releases what was used for sub-
5678 expansions (unless the block got too big). However, discard this block if
5679 the first thing is a variable or header, so that we can use its block when
5680 it is dynamic (useful for very large $message_headers, for example).
5682 6. Lookups now cache *every* query, not just the most recent. A new, separate
5683 store pool is used for this. It can be recovered when all lookup caches are
5684 flushed. Lookups now release memory at the end of their result strings.
5685 This has involved some general refactoring of the lookup sources.
5687 7. Some code has been added to the store_xxx() functions to reduce the amount
5688 of flapping under certain conditions.
5690 8. log_incoming_interface used to affect only the <= reception log lines. Now
5691 it causes the local interface and port to be added to several more SMTP log
5692 lines, for example "SMTP connection from", and rejection lines.
5694 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5696 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5698 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5699 could be overwritten at the end of the current message (or the start of a
5700 new message if it was set in a HELO ACL). The value is now preserved for
5701 the duration of the SMTP connection.
5703 12. If a transport had a headers_rewrite setting, and a matching header line
5704 contained an unqualified address, that address was qualified, even if it
5705 did not match any rewriting rules. The underlying bug was that the values
5706 of the flags that permit the existence of unqualified sender and recipient
5707 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5708 non-local messages, and by -bnq for local messages) were not being
5709 preserved with the message after it was received.
5711 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5712 "next input=" as part of the text comprising the host identity instead of
5713 the correct text. The code was using the same buffer for two different
5714 strings. However, depending on which order the printing function evaluated
5715 its arguments, the bug did not always show up. Under Linux, for example, my
5716 test suite worked just fine.
5718 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5719 doesn't work with some older versions of Perl. It has been changed to "my",
5720 which in any case is probably the better facility to use.
5722 15. A really picky compiler found some instances of statements for creating
5723 error messages that either had too many or two few arguments for the format
5726 16. The size of the buffer for calls to the DNS resolver has been increased
5727 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5728 for addresses that have a lot of PTR records. This alleviates a problem; it
5729 does not fully solve it.
5731 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5732 buffer now truncates the list and logs the incident, which is the same
5733 action as happens when Exim is looking up a host name and its aliases.
5734 Previously in this situation something unpredictable would happen;
5735 sometimes it was "internal error: store_reset failed".
5737 18. If a server dropped the connection unexpectedly when an Exim client was
5738 using GnuTLS and trying to read a response, the client delivery process
5739 crashed while trying to generate an error log message.
5741 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5742 string, for example:
5744 warn message = H1: something\nH2: something
5746 the text was added as a single header line from Exim's point of view
5747 though it ended up OK in the delivered message. However, searching for the
5748 second and subsequent header lines using $h_h2: did not work. This has been
5749 fixed. Similarly, if a system filter added multiple headers in this way,
5750 the routers could not see them.
5752 20. Expanded the error message when iplsearch is called with an invalid key to
5753 suggest using net-iplsearch in a host list.
5755 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5756 ACLs are no longer actually imposed (and a message to that effect is
5759 22. If a "gecos" field in a passwd entry contained escaped characters, in
5760 particular, if it contained a \" sequence, Exim got it wrong when building
5761 a From: or a Sender: header from that name. A second bug also caused
5762 incorrect handling when an unquoted " was present following a character
5763 that needed quoting.
5765 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5766 was not being matched caselessly.
5768 24. Arranged for all hyphens in the exim.8 source to be escaped with
5771 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5772 properly. Recipient callout cache records were still being keyed to include
5773 the sender, even when use_sender was set false. This led to far more
5774 callouts that were necessary. The sender is no longer included in the key
5775 when use_sender is false.
5777 26. Added "control = submission" modifier to ACLs.
5779 27. Added the ${base62d: operator to decode base 62 numbers.
5781 28. dnsdb lookups can now access SRV records.
5783 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5784 the configuration file.
5786 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5787 (-v) mode. This makes the output for a verbose queue run more intelligible.
5789 31. Added a use_postmaster feature to recipient callouts.
5791 32. Added the $body_zerocount variable, containing the number of binary zero
5792 bytes in the message body.
5794 33. The time of last modification of the "new" subdirectory is now used as the
5795 "mailbox time last read" when there is a quota error for a maildir
5798 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5800 35. Added +ignore_unknown as a special item in host lists.
5802 36. Code for decoding IPv6 addresses in host lists is now included, even if
5803 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5804 address was recognized as an IP address, but was then not correctly decoded
5805 into binary, causing unexpected and incorrect effects when compared with
5812 1. Very minor rewording of debugging text in manualroute to say "list of
5813 hosts" instead of "hostlist".
5815 2. If verify=header_syntax was set, and a header line with an unqualified
5816 address (no domain) and a large number of spaces between the end of the
5817 name and the colon was received, the reception process suffered a buffer
5818 overflow, and (when I tested it) crashed. This was caused by some obsolete
5819 code that should have been removed. The fix is to remove it!
5821 3. When running in the test harness, delay a bit after writing a bounce
5822 message to get a bit more predictability in the log output.
5824 4. Added a call to search_tidyup() just before forking a reception process. In
5825 theory, someone could use a lookup in the expansion of smtp_accept_max_
5826 per_host which, without the tidyup, could leave open a database connection.
5828 5. Added the variables $recipient_data and $sender_data which get set from a
5829 lookup success in an ACL "recipients" or "senders" condition, or a router
5830 "senders" option, similar to $domain_data and $local_part_data.
5832 6. Moved the writing of debug_print from before to after the "senders" test
5835 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5836 problems for message scanning, either using a data ACL, or using
5837 local_scan() because the Received: header was not generated till after they
5838 were called (in order to set the time as the time of reception completion).
5839 I have revised the way this works. The header is now generated after the
5840 body is received, but before the ACL or local_scan() are called. After they
5841 are run, the timestamp in the header is updated.
5847 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5848 before starting a queue runner without re-exec. This happened only when
5849 deliver_drop_privilege was set or when the Exim user was set to root. The
5850 effect of the bug was that timeouts during subsequent deliveries caused
5851 crashes instead of being properly handled. The handler is now left at its
5852 default (and expected) setting.
5854 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5855 message, again when deliver_drop_privilege is set or Exim is run as root.
5856 The bug described in (1) was not present in this case, but the tidying up
5857 of the other signals was missing. I have made the two cases consistent.
5859 3. The ignore_target_hosts setting on a manualroute router was being ignored
5860 for hosts that were looked up using the /MX notation.
5862 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5865 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5866 operated on the sender address. After changing the $sender_address to <>
5867 for the sender address verify, Exim was re-instated it as the original
5868 (before rewriting) address, but remembering that it had rewritten it, so it
5869 wasn't rewriting it again. This bug also had the effect of breaking the
5870 sender address verification caching when the sender address was rewritten.
5872 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5873 This has been changed so that if the ip literal address matches
5874 ignore_target_hosts, the router declines.
5876 7. Added expansion conditions match_domain, match_address, and match_local_
5877 part (NOT match_host).
5879 8. The placeholder for the Received: header didn't have a length field set.
5881 9. Added code to Exim itself and to exim_lock to test for a specific race
5882 condition that could lead to file corruption when using MBX delivery. The
5883 issue is with the lockfile that is created in /tmp. If this file is removed
5884 after a process has opened it but before that process has acquired a lock,
5885 there is the potential for a second process to recreate the file and also
5886 acquire a lock. This could lead to two Exim processes writing to the file
5887 at the same time. The added code performs the same test as UW imapd; it
5888 checks after acquiring the lock that its file descriptor still refers to
5889 the same named file.
5891 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5892 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5895 11. Added the smtp_active_hostname option. If used, this will typically be made
5896 to depend on the incoming interface address. Because $interface_address is
5897 not set up until the daemon has forked a reception process, error responses
5898 that can happen earlier (such as "too many connections") no longer contain
5901 12. If an expansion in a condition on a "warn" statement fails because a lookup
5902 defers, the "warn" statement is abandoned, and the next ACL statement is
5903 processed. Previously this caused the whole ACL to be aborted.
5905 13. Added the iplsearch lookup type.
5907 14. Added ident_timeout as a log selector.
5909 15. Added tls_certificate_verified as a log selector.
5911 16. Added a global option tls_require_ciphers (compare the smtp transport
5912 option of the same name). This controls incoming TLS connections.
5914 17. I finally figured out how to make tls_require_ciphers do a similar thing
5915 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5916 before starting the TLS session.
5918 18. Tabs are now shown as \t in -bP output.
5920 19. If the log selector return_path_on_delivery was set, Exim crashed when
5921 bouncing a message because it had too many Received: header lines.
5923 20. If two routers both had headers_remove settings, and the first one included
5924 a superfluous trailing colon, the final name in the first list and the
5925 first name in the second list were incorrectly joined into one item (with a
5926 colon in the middle).
5932 1. Added -C and -D options to the exinext utility, mainly to make it easier
5933 to include in the automated testing, but these could be helpful when
5934 multiple configurations are in use.
5936 2. The exinext utility was not formatting the output nicely when there was
5937 an alternate port involved in the retry record key, nor when there was a
5938 message id as well (for retries that were specific to a specific message
5939 and a specific host). It was also confused by IPv6 addresses, because of
5940 the additional colons they contain. I have fixed the IPv4 problem, and
5941 patched it up to do a reasonable job for IPv6.
5943 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5944 delivery, the log line now contains "pipelined" if PIPELINING was used.
5946 4. An SMTP transport process used to panic and die if the bind() call to set
5947 an explicit outgoing interface failed. This has been changed; it is now
5948 treated in the same way as a connect() failure.
5950 5. A reference to $sender_host_name in the part of a conditional expansion
5951 that was being skipped was still causing a DNS lookup. This no longer
5954 6. The def: expansion condition was not recognizing references to header lines
5955 that used bh_ and bheader_.
5957 7. Added the _cache feature to named lists.
5959 8. The code for checking quota_filecount in the appendfile transport was
5960 allowing one more file than it should have been.
5962 9. For compatibility with Sendmail, the command line option
5970 and sets the incoming protocol and host name (for trusted callers). The
5971 host name and its colon can be omitted when only the protocol is to be set.
5972 Note the Exim already has two private options, -pd and -ps, that refer to
5973 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5974 "s", but I don't think that's a major issue.
5976 10. A number of refactoring changes to the code, none of which should affect
5979 (a) The number of logging options was getting close to filling up the
5980 32-bit word that was used as a bit map. I have split them into two classes:
5981 those that are passed in the argument to log_write(), and those that are
5982 only ever tested independently outside of that function. These are now in
5983 separate 32-bit words, so there is plenty of room for expansion again.
5984 There is no change in the user interface or the logging behaviour.
5986 (b) When building, for example, log lines, the code previously used a
5987 macro that called string_cat() twice, in order to add two strings. This is
5988 not really sufficiently general. Furthermore, there was one instance where
5989 it was actually wrong because one of the argument was used twice, and in
5990 one call a function was used. (As it happened, calling the function twice
5991 did not affect the overall behaviour.) The macro has been replaced by a
5992 function that can join an arbitrary number of extra strings onto a growing
5995 (c) The code for expansion conditions now uses a table and a binary chop
5996 instead of a serial search (which was left over from when there were very
5997 few conditions). Also, it now recognizes conditions like "pam" even when
5998 the relevant support is not compiled in: a suitably worded error message is
5999 given if an attempt is made to use such a condition.
6001 11. Added ${time_interval:xxxxx}.
6003 12. A bug was causing one of the ddress fields not to be passed back correctly
6004 from remote delivery subprocesses. The field in question was not being
6005 subsequently used, so this caused to problems in practice.
6007 13. Added new log selectors queue_time and deliver_time.
6009 14. Might have fixed a bug in maildirsizefile handling that threw up
6010 "unexpected character" debug warnings, and recalculated the data
6011 unnecessarily. In any case, I expanded the warning message to give more
6014 15. Added the message "Restricted characters in address" to the statements in
6015 the default ACL that block characters like @ and % in local parts.
6017 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6018 Three changes have been made:
6020 (a) There was a serious bug; a negative response to MAIL caused the whole
6021 recipient domain to be cached as invalid, thereby blocking all messages
6022 to all local parts at the same domain, from all senders. This bug has
6023 been fixed. The domain is no longer cached after a negative response to
6024 MAIL if the sender used is not empty.
6026 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6029 (c) A new callout option, "use_sender" has been added for people who want
6030 the modified behaviour.
6036 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6039 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6040 indeed breaks things for older releases.
6042 3. Added additional logging to the case where there is a problem reading data
6043 from a filter that is running in a subprocess using a pipe, in order to
6044 try to track down a specific problem.
6046 4. Testing facility fudge: when running in the test harness and attempting
6047 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6048 getting "No route to host". Convert this to a timeout.
6050 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6053 6. Some OS don't have socklen_t but use size_t instead. This affects the
6054 fifth argument of getsockopt() amongst other things. This is now
6055 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6056 can be set for individual OS. I have set it for SunOS5, OSF1, and
6057 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6058 some earlier ones do not.
6060 7. Change 4.30/15 was not doing the test caselessly.
6062 8. The standard form for an IPv6 address literal was being rejected by address
6063 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6064 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6065 this, as well as the form without the "IPv6" on the front (but only when
6066 address literals are enabled, of course).
6068 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6070 10. Exim crashed if a message with an empty sender address specified by -f
6071 encountered a router with an errors_to setting. This could be provoked only
6072 by a command such as
6076 where an empty string was supplied; "<>" did not hit this bug.
6078 11. Installed PCRE release 4.5.
6080 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6081 remained set. It is now erased.
6083 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6084 times from message ids (which are base 36 rather than the normal 62).
6086 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6087 were being counted as actual protocol errors, and logged if the log
6088 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6089 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6090 and DATA following a set of rejected RCPTs do not count as protocol errors.
6091 In other words, Exim assumes they were pipelined, though this may not
6092 actually be the case. Of course, in all cases the client gets an
6093 appropriate error code.
6095 15. If a lookup fails in an ACL condition, a message about the failure may
6096 be available; it is used if testing the ACL cannot continue, because most
6097 such messages specify what the cause of the deferral is. However, some
6098 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6099 that caused an old message to be retained and used if a later statement
6100 caused a defer, replacing the real cause of the deferral.
6102 16. If an IP address had so many PTR records that the DNS lookup buffer
6103 was not large enough to hold them, Exim could crash while trying to process
6104 the truncated data. It now detects and logs this case.
6106 17. Further to 4.21/58, another change has been made: if (and only if) the
6107 first line of a message (the first header line) ends with CRLF, a bare LF
6108 in a subsequent header line has a space inserted after it, so as not to
6109 terminate the header.
6111 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6112 unnecessarily, used atoi() instead of strtol(), and didn't check the
6113 termination when getting file sizes from file names by regex.
6115 19. Completely re-implemented the support for maildirsize files, in the light
6116 of a number of problems with the previous contributed implementation
6117 (4.30/29). In particular:
6119 . If the quota is zero, the maildirsize file is maintained, but no quota is
6122 . If the maildir directory does not exist, it is created before any attempt
6123 to write a maildirsize file.
6125 . The quota value in the file is just a cache; if the quota is changed in
6126 the transport, the new value overrides.
6128 . A regular expression is available for excluding directories from the
6131 20. The autoreply transport checks the characters in options that define the
6132 message's headers; it allows continued headers, but it was checking with
6133 isspace() after an embedded newline instead of explicitly looking for a
6136 21. If all the "regular" hosts to which an address was routed had passed their
6137 expiry times, and had not reached their retry times, the address was
6138 bounced, even if fallback hosts were defined. Now Exim should go on to try
6141 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6142 equivalent code in the SMTP transport. Some hosts send humungous responses
6143 to HELO/EHLO, more than 1024 it seems.
6145 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6146 gives compiler warnings in some environments. I've now done it "properly",
6149 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6150 (because of problems with the built-in one) was declared to return uschar *
6151 instead of char *, causing compiler failure.
6153 25. Fixed a file descriptor leak when processing alias/forward files.
6155 26. Fixed a minor format string issue in dbfn.c.
6157 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6159 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6160 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6163 29. When a sender address is verified, it is cached, to save repeating the test
6164 when there is more than one recipient in a message. However, when the
6165 verification involves a callout, it is possible for different callout
6166 options to be set for different recipients. It is too complicated to keep
6167 track of this in the cache, so now Exim always runs a verification when a
6168 callout is required, relying on the callout cache for the optimization.
6169 The overhead is duplication of the address routing, but this should not be
6172 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6173 to be verified with callout=postmaster, and the main callout worked but the
6174 postmaster check failed, the verification correctly failed. However, if a
6175 subsequent RCPT command asked for sender verification *without* the
6176 postmaster check, incorrect caching caused this verification also to fail,
6179 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6180 it was not caching the DNS options (qualify_single, search_parents) that
6181 were used when the lookup failed. A subsequent lookup with different
6182 options therefore always gave the same answer, though there were cases
6183 where it should not have. (Example: a "domains = !$mx_any" option on a
6184 dnslookup router: the "domains" option is always processed without any
6185 widening, but the router might have qualify_single set.) Now Exim uses the
6186 cached value only when the same options are set.
6188 32. Added John Jetmore's "exipick" utility to the distribution.
6190 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6191 than a timeout (e.g. a certificate is required, and is not provided), an
6192 Exim server now closes the connection immediately. Previously it waited for
6193 the client to close - but if the client is SSL, it seems that they each
6194 wait for each other, leading to a delay before one of them times out.
6196 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6197 maintained 0.8.x compatibility because I don't think many are using it, and
6198 it is clearly obsolete.
6200 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6203 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6204 client certificate was expired. A simple patch fixes this, though I don't
6205 understand the full logic of why the verify callback is called multiple
6208 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6209 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6210 which causes problems with some clients (such as the Certicom SSL Plus
6211 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6212 disables the coutermeasure allowing Eudora to connect."
6214 38. Exim was not checking that a write() to a log file succeeded. This could
6215 lead to Bad Things if a log got too big, in particular if it hit a file
6216 size limit. Exim now panics and dies if it cannot write to a log file, just
6217 as it does if it cannot open a log file.
6219 39. Modified OS/Makefile-Linux so that it now contains
6221 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6223 The two -D definitions ensure that Exim is compiled with large file
6224 support, which makes it possible to handle log files that are bigger than
6227 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6228 instance) a domain was checked against a named list that involved a lookup,
6229 causing $domain_data to be set, then another domain was checked against the
6230 same list, then the first domain was re-checked, the value of $domain_data
6231 after the final check could be wrong. In particular, if the second check
6232 failed, it could be set empty. This bug probably also applied to
6235 41. The strip_trailing_dot option was not being applied to the address given
6236 with the -f command-line option.
6238 42. The code for reading a message's header from the spool was incrementing
6239 $received_count, but never initializing it. This meant that the value was
6240 incorrect (doubled) while delivering a message in the same process in which
6241 it was received. In the most common configuration of Exim, this never
6242 happens - a fresh exec is done - but it can happen when
6243 deliver_drop_privilege is set.
6245 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6246 it now includes up to 150 characters of the unexpected data in the log
6249 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6250 and building data strings. The size of both of these buffers was 10 000
6251 bytes - far larger than anybody would *ever* want, thought I. Needless to
6252 say, somebody hit the limit. I have increased the maximum line length to
6253 20 000 and the maximum data length of concatenated lines to 100 000. I have
6254 also fixed two bugs, because there was no checking on these buffers. Tsk,
6255 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6256 buffer is too small.
6258 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6259 lsearch lookups. Now it does.
6261 46. When parsing a route_list item in a manualroute router, a fixed-length
6262 buffer was used for the list of hosts. I made this 1024 bytes long,
6263 thinking that nobody would ever have a list of hosts that long. Wrong.
6264 Somebody had a whole pile of complicated expansion conditions, and the
6265 string was silently truncated, leading to an expansion error. It turns out
6266 that it is easier to change to an unlimited length (owing to other changes
6267 that have happened since this code was originally written) than to build
6268 structure for giving a limitation error. The length of the item that
6269 expands into the list of hosts is now unlimited.
6271 47. The lsearch lookup could not handle data where the length of text line was
6272 more than 4095 characters. Such lines were truncated, leading to shortened
6273 data being returned. It should now handle lines of any length.
6275 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6276 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6279 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6280 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6281 no longer happens in comment lines. A list of replacements is now placed
6282 at the head of all of the source files, except those whose only change is
6283 to replace PERL_COMMAND in the very first #! line.
6285 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6286 messages on the queue, with a bottom-up merge sort, using code contributed
6287 by Michael Haardt. This should make operations like -bp somewhat faster on
6288 large queues. It won't affect queue runners, except when queue_run_in_order
6291 51. Installed eximstats 1.31 in the distribution.
6293 52. Added support for SRV lookups to the dnslookup router.
6295 53. If an ACL referred to $message_body or $message_body_end, the value was not
6296 reset for any messages that followed in the same SMTP session.
6298 54. The store-handling optimization for building very long strings was not
6299 differentiating between the different store pools. I don't think this
6300 actually made any difference in practice, but I've tidied it.
6302 55. While running the routers to verify a sender address, $sender_address
6303 was still set to the sender address. This is wrong, because when routing to
6304 send a bounce to the sender, it would be empty. Therefore, I have changed
6305 it so that, while verifying a sender address, $sender_address is set to <>.
6306 (There is no change to what happens when verifying a recipient address.)
6308 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6309 target A or AAAA records (if not already returned) without resetting the
6310 qualify_single or search_parents options of the DNS resolver. These are
6311 inappropriate in this case because the targets of MX and SRV records must
6312 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6313 target that, when qualified, matched something in the local domain. These
6314 two options are now turned off when doing these lookups.
6316 57. It seems that at least some releases of Reiserfs (which does not have the
6317 concept of a fixed number of inodes) returns zero and not -1 for the
6318 number of available inodes. This interacted badly with check_spool_inodes,
6319 which assumed that -1 was the "no such thing" setting. What I have done is
6320 to check that the total number of inodes is greater than zero before doing
6321 the test of how many are available.
6323 58. When a "warn" ACL statement has a log_message modifier, the message is
6324 remembered, and not repeated. This is to avoid a lot of repetition when a
6325 message has many recipients that cause the same warning to be written.
6326 However, Exim was preserving the list of already written lines for an
6327 entire SMTP session, which doesn't seem right. The memory is now reset if a
6328 new message is started.
6330 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6331 debugging output unless log_rewrite was also set.
6333 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6334 of (int)(handle) when we know that handle contains (void *)(-1).
6336 61. The Exim daemon panic-logs an error return when it closes the incoming
6337 connection. However "connection reset by peer" seems to be common, and
6338 isn't really an error worthy of noting specially, so that particular error
6341 62. When Exim is trying to find all the local interfaces, it used to panic and
6342 die if the ioctl to get the interface flags failed. However, it seems that
6343 on at least one OS (Solaris 9) it is possible to have an interface that is
6344 included in the list of interfaces, but for which you get a failure error
6345 for this call. This happens when the interface is not "plumbed" into a
6346 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6347 failure of the "get flags" call assumes that the interface is down.
6349 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6350 makes life easier for people who are doing arithmetic on fields extracted
6351 from dates, where you often get leading zeros that should not be
6352 interpreted as octal.
6354 64. Added qualify_domain to the redirect router, to override the global
6357 65. If a pathologically long header line contained very many addresses (the
6358 report of this problem mentioned 10 000) and each of them was rewritten,
6359 Exim could use up a very large amount of memory. (It kept on making new
6360 copies of the header line as it rewrote, and never released the old ones.)
6361 At the expense of a bit more processing, the header rewriting function has
6362 been changed so that it no longer eats memory in this way.
6364 66. The generation of the Received: header has been moved from the time that a
6365 message starts to be received, to the time that it finishes. The timestamp
6366 in the Received: header should now be very close to that of the <= log
6367 line. There are two side-effects of this change:
6369 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6370 logged header lines no longer include the local Received: line, because
6371 it has not yet been created. The same applies to a copy of the message
6372 that is returned to a non-SMTP sender when a message is rejected.
6374 (b) When a filter file is tested using -bf, no additional Received: header
6375 is added to the test message. After some thought, I decided that this
6378 This change does not affect the value of $received_for. It is still set
6379 after address rewriting, but before local_scan() is called.
6381 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6383 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6384 gave an unhelpful panic error message, and a defer error. I have managed to
6385 change this behaviour so that it now rejects any supplied certificate,
6386 which seems right, as the list of acceptable certificates is empty.
6388 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6389 gave an unhelpful defer error. I have not managed to make this reject any
6390 supplied certificates, but the error message it gives is "no certificate
6391 supplied", which is not helpful.
6393 70. exigrep's output now also includes lines that are not associated with any
6394 message, but which match the given pattern. Implemented by a patch from
6395 Martin Sluka, which also tidied up the Perl a bit.
6397 71. Recipient callout verification, like sender verification, was using <> in
6398 the MAIL FROM command. This isn't really the right thing, since the actual
6399 sender may affect whether the remote host accepts the recipient or not. I
6400 have changed it to use the actual sender in the callout; this means that
6401 the cache record is now keyed on a recipient/sender pair, not just the
6402 recipient address. There doesn't seem to be a real danger of callout loops,
6403 since a callout by the remote host to check the sender would use <>.
6404 [SEE ABOVE: changed after hitting problems.]
6406 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6407 temporary errors. However, in the case of such a code being given after
6408 the end of a data transmission (i.e. after ".") Exim was failing to write
6409 a retry record for the message. (Yes, there was some broken host that was
6410 actually sending 8xx at this point.)
6412 73. An unknown lookup type in a host list could cause Exim to panic-die when
6413 the list was checked. (An example that provoked this was putting <; in the
6414 middle of a list instead of at the start.) If this happened during a DATA
6415 ACL check, a -D file could be left lying around. This kind of configuration
6416 error no longer causes Exim to die; instead it causes a defer error. The
6417 incident is still logged to the main and panic logs.
6419 74. Buglet left over from Exim 3 conversion. The message "too many messages
6420 in one connection" was written to the rejectlog but not the mainlog, except
6421 when address rewriting (yes!) was being logged.
6423 75. Added write_rejectlog option.
6425 76. When a system filter was run not as root (that is, when system_filter_user
6426 was set), the values of the $n variables were not being returned to the
6427 main process; thus, they were not subsequently available in the $sn
6430 77. Added +return_path_on_delivery log selector.
6432 78. A connection timeout was being treated differently from recipients deferred
6433 when testing hosts_max_try with a message that was older than the host's
6434 retry timeout. (The host should not be counted, thus allowing all hosts to
6435 be tried at least once before bouncing.) This may have been the cause of an
6436 occasionally reported bug whereby a message would remain on the queue
6437 longer than the retry timeout, but would be bounced if a delivery was
6438 forced. I say "may" because I never totally pinned down the problem;
6439 setting up timeout/retry tests is difficult. See also the next item.
6441 79. The ultimate address timeout was not being applied to errors that involved
6442 a combination of host plus message (for example, a timeout on a MAIL
6443 command). When an address resolved to a number of possible hosts, and they
6444 were not all tried for each delivery (e.g. because of hosts_max_try), a
6445 message could remain on the queue longer than the retry timeout.
6447 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6450 81. Fixed an obscure SMTP outgoing bug which required at least the following
6451 conditions: (a) there was another message waiting for the same server;
6452 (b) the server returned 5xx to all RCPT commands in the first message so
6453 that the message was not completed; (c) the server dropped the connection
6454 or gave a negative response to the RSET that Exim sends to abort the
6455 transaction. The observed case was a dropped connection after DATA that had
6456 been sent in pipelining mode. That is, the server had advertised PIPELINING
6457 but was not implementing it correctly. The effect of the bug was incorrect
6458 behaviour, such as trying another host, and this could lead to a crash.
6464 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6465 and daemon.c were passed as pointers to ints; they should have been
6466 pointers to socklen_t variables (which are typically unsigned ints).
6468 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6471 3. Fixed a really odd bug that affected only the testing scheme; patching a
6472 certain fixed string in the binary changed the value of another string that
6473 happened to be identical to the end of the original first string.
6475 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6476 name", it returns that address as the IP address. On some operating
6477 systems (e.g. Solaris), it also passes back the IP address string as the
6478 "host name". However, on others (e.g. Linux), it passes back an empty
6479 string. Exim wasn't checking for this, and was changing the host name to an
6480 empty string, assuming it had been canonicalized.
6482 5. Although rare, it is permitted to have more than one PTR record for a given
6483 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6484 all the names associated with an address, because they do in Solaris.
6485 However, it seems that they do not in Linux for data that comes from the
6486 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6487 I found this out when I moved to a new Linux workstation and tried to run
6488 the Exim test suite.
6490 To get round this problem I have changed the code so that it now does its
6491 own call to the DNS to look up PTR records when searching for a host name.
6492 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6493 addresses that are only in /etc/hosts are still found.
6495 This behaviour is, however, controlled by an option called host_lookup_
6496 order, which defaults to "bydns:byaddr". If people want to use the other
6497 order, or indeed, just use one or the other means of lookup, they can
6498 specify it in this variable.
6500 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6501 some operating systems, this comes back from gethostbyaddr() as an empty
6502 string, and this is what Exim used to test for. However, it seems that in
6503 other systems, "." is yielded. Exim now tests for this case too.
6505 7. The values of check_spool_space and check_log_space are now held internally
6506 as a number of kilobytes instead of an absolute number of bytes. If a
6507 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6508 kilobyte. This means that much larger values can be stored.
6510 8. Exim monitor: an attempt to get the action menu when not actually pointing
6511 at a message produces an empty menu entitled "No message selected". This
6512 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6513 no entries in it ("Shell widget menu has zero width and/or height"). So I
6514 have added a single, blank menu entry in this case.
6516 9. Added ${quote_local_part.
6518 10. MIME decoding is now applied to the contents of Subject: header lines when
6521 11. Now that a reference to $sender_host_address automatically causes a reverse
6522 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6523 host lookup before query-style lookups in lists that might use this
6524 variable. This has therefore been abolished, and the "net-" prefix is no
6525 longer necessary for query-style lookups.
6527 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6528 have been a typo for LFLAGS, so it has been changed.
6530 13. The install script calls Exim with "-C /dev/null" in order to find the
6531 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6532 to be output. However, since Exim outputs its version number before the
6533 error, it didn't break the script. It just looked ugly. I fixed this by
6534 always allowing "-C /dev/null" if the caller is root.
6536 14. Ignore overlarge ACL variable number when reading spool file - insurance
6537 against a later release with more variables having written the file.
6539 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6540 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6541 this, as well as the form without the "IPv6" on the front.
6543 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6544 OS/Makefile-Darwin file.
6546 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6547 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6549 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6550 variable. However, some OS use ints for inodes. I've added cast to long int
6551 to get rid of the compiler warning.
6553 19. I had forgotten to lock out "/../" in configuration file names when
6554 ALT_CONFIG_PREFIX was set.
6556 20. Routers used for verification do not need to specify transports. However,
6557 if such a router generated a host list, and callout was configured, Exim
6558 crashed, because it could not find a port number from the (non-existent)
6559 transport. It now assumes port 25 in this circumstance.
6561 21. Added the -t option to exigrep.
6563 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6564 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6565 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6566 them is set, LOOKUP_LSEARCH is forced.
6568 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6570 24. Added sender and host information to the "rejected by local_scan()" log
6571 line; previously there was no indication of these.
6573 25. Added .include_if_exists.
6575 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6576 Linux. It turns out that not all file systems support this. Apparently some
6577 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6578 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6579 not supported on the file descriptor, is now ignored when Exim is trying to
6580 sync a directory. This applies only to Linux.
6582 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6584 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6585 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6588 29. Added support for maildirsize files from supplied patch (modified a bit).
6590 30. The use of :fail: followed by an empty string could lead Exim to respond to
6591 sender verification failures with (e.g.):
6593 550 Verification failed for <xxx>
6594 550 Sender verify failed
6596 where the first response line was missing the '-' that indicates it is not
6597 the final line of the response.
6599 31. The loop for finding the name of the user that called Exim had a hardwired
6600 limit of 10; it now uses the value of finduser_retries, which is used for
6601 all other user lookups.
6603 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6606 33. Exim was neglecting to zero errno before one call of strtol() when
6607 expanding a string and expecting an integer value. On some systems this
6608 resulted in spurious "integer overflow" errors. Also, it was casting the
6609 result into an int without checking.
6611 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6612 did not work. The code looks as if it has *never* worked, though it appears
6613 to have been documented since at least release 1.62. I have made it work.
6615 35. The "timeout_DNS" error in retry rules, also documented since at least
6616 1.62, also never worked. As it isn't clear exactly what this means, and
6617 clearly it isn't a major issue, I have abolished the feature by treating it
6618 as "timeout", and writing a warning to the main and panic logs.
6620 36. The display of retry rules for -brt wasn't always showing the error code
6623 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6624 timeout_connect_A, timeout_connect_MX.
6626 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6627 to the empty sender.
6629 39. The daemon was not analysing the content of -oX till after it had closed
6630 stderr and disconnected from the controlling terminal. This meant that any
6631 syntax errors were only noted on the panic log, and the return code from
6632 the command was 0. By re-arranging the code a little, I've made the
6633 decoding happen first, so such errors now appear on stderr, and the return
6634 code is 1. However, the actual setting up of the sockets still happens in
6635 the disconnected process, so errors there are still only recorded on the
6638 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6639 connections (as happens on some IP stacks) was logged at start up time as
6640 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6641 it from "IPv6 and IPv4", which means that two separate sockets are being
6644 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6645 says whether AF_INET or AF_INET6 was passed as an argument.
6647 42. Exiwhat output was messed up when time zones were included in log
6650 43. Exiwhat now gives more information about the daemon's listening ports,
6651 and whether -tls-on-connect was used.
6653 44. The "port" option of the smtp transport is now expanded.
6655 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6656 silently ignored. Now an error message is written to the main and panic
6659 46. There's a new ACL modifier called "logwrite" which writes to a log file
6660 as soon as it is encountered.
6662 47. Added $local_user_uid and $local_user_gid at routing time.
6664 48. Exim crashed when trying to verify a sender address that was being
6667 49. Exim was recognizing only a space character after ".include". It now also
6668 recognizes a tab character.
6670 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6671 extracting the relevant information from the specification. The man page no
6672 longer contains scrambled data for the -d option, and I've added a section
6673 at the front about calling Exim under different names.
6675 51. Added "extra_headers" argument to the "mail" command in filter files.
6677 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6680 53. Installed eximstats 1.29.
6682 54. Added transport_filter_timeout as a generic transport option.
6684 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6685 Cc: header lines. This was required by RFC 822, but it not required by RFC
6688 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6689 incoming messages that did not have them. Now it does so only if the
6690 message originates locally, that is, if there is no associated remote host
6691 address. When Resent- header lines are present, this applies to the Resent-
6692 lines rather than the non-Resent- lines.
6694 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6695 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6697 58. Messages for configuration errors now include the name of the main
6698 configuration file - useful now that there may be more than one file in a
6699 list (.included file names were always shown).
6701 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6702 for those rare installations that do not start the daemon as root or run it
6703 setuid root. I've cut out the call to initgroups() if the daemon is not
6706 60. The Exim user and group can now be bound into the binary as text strings
6707 that are looked up at the start of Exim's processing.
6709 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6711 62. Added $mailstore_basename variable.
6713 63. Installed patch to sieve.c from Michael Haardt.
6715 64. When Exim failed to open the panic log after failing to open the main log,
6716 the original message it was trying to log was written to stderr and debug
6717 output, but if they were not available (the usual case in production), it
6718 was lost. Now it is written to syslog before the two lines that record the
6719 failures to open the logs.
6721 65. Users' Exim filters run in subprocesses under the user's uid. It is
6722 possible for a "deliver" command or an alias in a "personal" command to
6723 provoke an address rewrite. If logging of address rewriting is configured,
6724 this fails because the process is not running as root or exim. There may be
6725 a better way of dealing with this, but for the moment (because 4.30 needs
6726 to be released), I have disabled address rewrite logging when running a
6727 filter in a non-root, non-exim process.
6733 1. The buildconfig auxiliary program wasn't quoting the value set for
6734 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6735 not defined. This bug was masked in 4.22 by the effect that was fixed in
6738 2. Some messages that were rejected after a message id was allocated were
6739 shown as "incomplete" by exigrep. It no longer does this for messages that
6740 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6742 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6743 have allow_domain_literals set, the ID did not get logged in the <= line.
6744 Domain literals are now always recognized in Message-ID: header lines.
6746 4. The first argument for a ${extract expansion item is the key name or field
6747 number. Leading and trailing spaces in this item were not being ignored,
6748 causing some misleading effects.
6750 5. When deliver_drop_privilege was set, single queue runner processes started
6751 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6752 same command in the process it spins off) were not dropping privilege.
6754 6. When the daemon running as "exim" started a queue runner, it always
6755 re-executed Exim in the spun-off process. This is a waste of effort when
6756 deliver_drop_privilege is set. The new process now just calls the
6757 queue-runner function directly.
6763 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6766 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6767 ignored. Though the use of -oP was forcing the writing of a pid file, it
6768 was always written to the default place.
6770 3. If the message "no IP address found for host xxxx" is generated during
6771 incoming verification, it is now followed by identification of the incoming
6772 connection (so you can more easily find what provoked it).
6774 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6776 5. Added some features to "harden" Exim a bit more against certain attacks:
6778 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6779 be put in Local/Makefile. This is like the never_users runtime option,
6780 but it cannot be overridden. The default setting is "root".
6782 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6783 prefix string with which any file named in a -C command line option
6786 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6787 is retained for -C and -D only if the caller of Exim is root. Without
6788 it, the exim user may also use -C and -D and retain privilege.
6790 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6791 command line option is disabled.
6793 6. Macro names set by the -D option must start with an upper case letter, just
6794 like macro names defined in the configuration file.
6796 7. Added "dereference=" facility to LDAP.
6798 8. Two instances of the typo "uknown" in the source files are fixed.
6800 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6801 the Configure-Makefile script screwed up while processing it.
6803 10. Incorporated PCRE 4.4.
6805 11. The SMTP synchronization check was not operating right at the start of an
6806 SMTP session. For example, it could not catch a HELO sent before the client
6807 waited for the greeting. There is now a check for outstanding input at the
6808 point when the greeting is written. Because of the duplex, asynchronous
6809 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6810 way, but not yet received, when the check is performed.
6812 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6813 on TCP/IP sockets, because this apparently causes some broken clients to
6816 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6817 unchanged) from the Cygwin maintainer.
6819 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6820 was supported instead of testing for mbx. Effectively a typo.
6822 15. The spa authenticator server code was not checking that the input it
6823 received was valid base64.
6825 16. The debug output line for the "set" modifier in ACLs was not showing the
6826 name of the variable that was being set.
6828 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6830 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6831 lookup on its own. Something else was needed to trigger the lookup. For
6832 example, a match in host_lookup or the need for a host name in a host list.
6833 Now, if $sender_host_name is referenced and the host name has not yet been
6834 looked up, a lookup is performed. If the lookup fails, the variable remains
6835 empty, and $host_lookup_failed is set to "1".
6837 19. Added "eqi" as a case-independent comparison operator.
6839 20. The saslauthd authentication condition could segfault if neither service
6840 nor realm was specified.
6842 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6843 error message that was logged was misleading, and incoming SMTP
6844 connections were dropped. The message is now more accurate, and temporary
6845 errors are given to SMTP connections.
6847 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6848 (except RSET) with a 421 error, until QUIT is received. However, it was
6849 failing to send a response to QUIT.
6851 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6852 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6853 ACL is now run after the helo_try_verify_hosts code.
6855 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6856 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6857 case-independent, so other case variants are also recognized). Apparently
6858 some systems use these upper case variants.
6860 25. If more than two messages were waiting for the same host, and a transport
6861 filter was specified for the transport, Exim sent two messages over the
6862 same TCP/IP connection, and then failed with "socket operation on non-
6863 socket" when it tried to send the third.
6865 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6867 27. The extern definition of crypt16() in expand.c was not being excluded when
6868 the OS had its own crypt16() function.
6870 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6871 as a preferred synonym for return_size_limit, both as an option and as an
6874 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6876 30. Changed the default configuration ACL to relax the local part checking rule
6877 for addresses that are not in any local domains. For these addresses,
6878 slashes and pipe symbols are allowed within local parts, but the sequence
6879 /../ is explicitly forbidden.
6881 31. SPA server authentication was not clearing the challenge buffer before
6884 32. log_message in a "warn" ACL statement was writing to the reject log as
6885 well as to the main log, which contradicts the documentation and doesn't
6886 seem right (because no rejection is happening). So I have stopped it.
6888 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6889 However, I am unable to do any testing of this.
6891 34. Fixed an infelicity in the appendfile transport. When checking directories
6892 for a mailbox, to see if any needed to be created, it was accidentally
6893 using path names with one or more superfluous leading slashes; tracing
6894 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6896 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6897 contents are added to the log line that is written for every discarded
6898 recipient. (Previously a log_message setting was ignored.)
6900 36. The ${quote: operator now quotes the string if it is empty.
6902 37. The install script runs exim in order to find its version number. If for
6903 some reason other than non-existence or emptiness, which it checks, it
6904 could not run './exim', it was installing it with an empty version number,
6905 i.e. as "exim-". This error state is now caught, and the installation is
6908 38. An argument was missing from the function that creates an error message
6909 when Exim fails to connect to the socket for saslauthd authentication.
6910 This could cause Exim to crash, or give a corrupted message.
6912 39. Added isip, isip4, and isip6 to ${if conditions.
6914 40. The ACL variables $acl_xx are now saved with the message, and can be
6915 accessed later in routers, transports, and filters.
6917 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6918 strings in the file are not string-expanded.
6920 42. If a MAIL command specified a SIZE value that was too large to fit into an
6921 int variable, the check against message_size_limit failed. Such values are
6922 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6923 day this will have to be increased, but I don't think I want to be around
6924 when emails are that large.
6931 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6932 iconv() is not standard in FreeBSD.
6934 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6935 IPv6 enabled. The observed symptom was a segmentation fault on return from
6936 the function os_common_find_running_interfaces() in src/os.c.
6938 3. In the check_special_case() function in daemon.c I had used "errno" as an
6939 argument name, which causes warnings on some systems. This was basically a
6940 typo, since it was named "eno" in the comments!
6942 4. The code that waits for the clock to tick (at a resolution of some fraction
6943 of a second) so as to ensure message-id uniqueness was always waiting for
6944 at least one whole tick, when it could have waited for less. [This is
6945 almost certainly not relevant at current processor speeds, where it is
6946 unlikely to ever wait at all. But we try to future-proof.]
6948 5. The function that sleeps for a time interval that includes fractions of a
6949 second contained a race. It did not block SIGALRM between setting the
6950 timer, and suspending (a couple of lines later). If the interval was short
6951 and the sigsuspend() was delayed until after it had expired, the suspension
6952 never ended. On busy systems this could lead to processes getting stuck for
6955 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6956 process, before it forks any delivery processes. The open lookup caching
6957 mechanism meant that the open file or database connection was passed into
6958 the delivery process. The problem was that delivery processes always tidy
6959 up cached lookup data. This could cause a problem for the next delivery
6960 process started by the queue runner, because the external queue runner
6961 process does not know about the closure. So the next delivery process
6962 still has data in the lookup cache. In the case of a file lookup, there was
6963 no problem because closing a file descriptor in a subprocess doesn't affect
6964 the parent. However, if the lookup was caching a connection to a database,
6965 the connection was closed, and the second delivery process was likely to
6966 see errors such as "PGSQL: query failed: server closed the connection
6967 unexpectedly". The problem has been fixed by closing all cached lookups
6968 in a queue runner before running a delivery process.
6970 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6971 seem to have the "const" qualifier which it has on other OS. I've
6974 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6975 *of the same type* (client or server) with the same public name that an
6976 error should be diagnosed.
6978 9. When Exim looked up a host name for an IP address, but failed to find the
6979 original IP address when looking up the host name (a safety check), it
6980 output the message "<ip address> does not match any IP for NULL", which was
6981 confusing, to say the least. The bug was that the host name should have
6982 appeared instead of "NULL".
6984 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6985 user that is built into the binary, and the -C or -D options is used, root
6986 privilege is dropped before the configuration file is read. In addition,
6987 logging is switched to stderr instead of the normal log files. If the
6988 configuration then re-defines the Exim user, the unprivileged environment
6989 is probably not what is expected, so Exim logs a panic warning message (but
6992 However, if deliver_drop_privilege is set, the unprivileged state may well
6993 be exactly what is intended, so the warning has been cut out in that case,
6994 and Exim is allowed to try to write to its normal log files.
7000 1. smtp_return_error_details was not giving details for temporary sender
7001 or receiver verification errors.
7003 2. Diagnose a configuration error if two authenticators have the same public
7006 3. Exim used not to create the message log file for a message until the first
7007 delivery attempt. This could be confusing when incoming messages were held
7008 for policy or load reasons. The message log file is now created at the time
7009 the message is received, and an initial "Received" line is written to it.
7011 4. The automatically generated man page for command line options had a minor
7012 bug that caused no ill effects; however, a more serious problem was that
7013 the procedure for building the man page automatically didn't always
7014 operate. Consequently, release 4.20 contains an out-of-date version. This
7015 shouldn't happen again.
7017 5. When building Exim with embedded Perl support, the script that builds the
7018 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7019 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7021 6. The freeze_tell option was not being used for messages that were frozen on
7022 arrival, either by an ACL or by local_scan().
7024 7. Added the smtp_incomplete_transaction log selector.
7026 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7027 was accepting AUTH without a new EHLO.
7029 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7030 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7033 10. Logging of TCP/IP connections (when configured) now happens in the main
7034 daemon process instead of the child process, so that the TCP/IP connection
7035 count is more accurate (but it can never be perfect).
7037 11. The use of "drop" in a nested ACL was not being handled correctly in the
7038 outer ACL. Now, if condition failure induced by the nested "drop" causes
7039 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7040 or "require"), the connection is dropped.
7042 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7043 that yield "discard" can now be used with an "accept" or a "discard" verb,
7044 but an error is generated for any others (because I can't see a useful way
7045 to define what should happen).
7047 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7048 are now processed in the same way as lines in the Exim configuration file.
7049 In particular, continuation lines are supported.
7051 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7053 15. Added -ti meaning -t -i.
7055 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7056 domains, and warn by logging if others are found.
7058 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7059 returned from GIFCONF when Exim is trying to find the list of interfaces on
7060 a host. The code in os.c has been modified to copy each ifreq to an aligned
7061 structure in all cases.
7063 Also, in some cases, the returned ifreq's were being copied to a 'struct
7064 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7065 means the last couple of bytes of an IPv6 address could be chopped if the
7066 ifreq contained only a normal sockaddr (14 bytes storage).
7068 18. Named domain lists were not supported in the hosts_treat_as_local option.
7069 An entry such as +xxxx was not recognized, and was treated as a literal
7072 19. Ensure that header lines added by a DATA ACL are included in the reject log
7073 if the ACL subsequently rejects the message.
7075 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7076 MD5 (which is deprecated).
7078 21. When testing a filter file using -bf, Exim was writing a message when it
7079 took the sender from a "From " line in the message, but it was not doing so
7080 when it took $return_path from a Return-Path: header line. It now does.
7082 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7083 with a valid header line field name (a series of printing characters
7084 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7086 23. Changed "disc" in the source to "disk" to conform to the documentation and
7087 the book and for uniformity.
7089 24. Ignore Sendmail's -Ooption=value command line item.
7091 25. When execve() failed while trying to run a command in a pipe transport,
7092 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7093 could be confused with a return value of 69 from the command itself. This
7094 has been changed to 127, the value the shell returns if it is asked to run
7095 a non-existent command. The wording for the related log line suggests a
7096 non-existent command as the problem.
7098 26. If received_header_text expands to an empty string, do not add a Received:
7099 header line to the message. (Well, it adds a token one on the spool, but
7100 marks it "old" so that it doesn't get used or transmitted.)
7102 27. Installed eximstats 1.28 (addition of -nt option).
7104 28. There was no check for failure on the call to getsockname() in the daemon
7105 code. This can fail if there is a shortage of resources on the system, with
7106 ENOMEM, for example. A temporary error is now given on failure.
7108 29. Contrary to the C standard, it seems that in some environments, the
7109 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7110 program. Exim now does this explicitly; it affects the formatting of
7111 timestamps using strftime().
7113 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7114 complaints. I've now initialized all the variables, to avoid this.
7116 32. Header lines added by a system filter were not being "seen" during
7117 transport-time rewrites.
7119 33. The info_callback() function passed to OpenSSL is set up with type void
7120 (*)(SSL *, int, int), as described somewhere. However, when calling the
7121 function (actually a macro) that sets it up, the type void(*)() is
7122 expected. I've put in a cast to prevent warnings from picky compilers.
7124 34. If a DNS black list lookup found a CNAME record, but there were no A
7125 records associated with the domain it pointed at, Exim crashed.
7127 35. If a DNS black list lookup returned more than one A record, Exim ignored
7128 all but the first. It now scans all returned addresses if a particular IP
7129 value is being sought. In this situation, the contents of the
7130 $dnslist_value variable are a list of all the addresses, separated by a
7133 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7134 to accept a host name and all its aliases if the forward lookup for any of
7135 them yielded the IP address of the incoming connection. Now it accepts only
7136 those names whose forward lookup yields the correct IP address. Any other
7137 names are discarded. This closes a loophole whereby a rogue DNS
7138 administrator could create reverse DNS records to break through a
7139 wildcarded host restriction in an ACL.
7141 37. If a user filter or a system filter that ran in a subprocess used any of
7142 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7143 the wrong values were passed to the pipe command ($thisaddress had the
7144 value of $0, $0 had the value of $1, etc). This bug was introduced by
7145 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7147 38. Improved the line breaking for long SMTP error messages from ACLs.
7148 Previously, if there was no break point between 40 and 75 characters, Exim
7149 left the rest of the message alone. Two changes have been made: (a) I've
7150 reduced the minimum length to 35 characters; (b) if it can't find a break
7151 point between 35 and 75 characters, it looks ahead and uses the first one
7152 that it finds. This may give the occasional overlong line, but at least the
7153 remaining text gets split now.
7155 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7156 file descriptors might be low, and that setting 1000 would always raise it.
7157 It turns out that in some environments, the limit is already over 1000 and
7158 that lowering it causes trouble. So now Exim takes care not to decrease it.
7160 40. When delivering a message, the value of $return_path is set to $sender_
7161 address at the start of routing (routers may change the value). By an
7162 oversight, this default was not being set up when an address was tested by
7163 -bt or -bv, which affected the outcome if any router or filter referred to
7166 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7167 log only when "message" or "log_message" are set. However, if one of the
7168 conditions was an address verification, or a call to a nested ACL, the
7169 messages generated by the underlying test were being passed through. This
7170 no longer happens. The underlying message is available in $acl_verify_
7171 message for both "message" and "log_message" expansions, so it can be
7172 passed through if needed.
7174 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7175 new expansion $bh_ to give the encoded byte string without charset
7176 translation. Translation happens only if iconv() is available; HAVE_ICONV
7177 indicates this at build time. HEADERS_CHARSET gives the charset to
7178 translate to; headers_charset can change it in the configuration, and
7179 "headers charset" can change it in an individual filter file.
7181 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7182 that creates RFC 2047 encoded "words" labels them as that charset instead
7183 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7184 expansion operator; (ii) when Exim creates a From: line for a local
7185 message; (iii) when a header line is rewritten to include a "phrase" part.
7187 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7188 buggy, causing it to skip the first lines of messages whose message ID
7189 ended in 'D'. This would not have bitten before Exim release 4.14, because
7190 message IDs were unlikely to end in 'D' before then. The effect was to have
7191 incorrect size information for certain domains.
7193 45. #include "config.h" was missing at the start of the crypt16.c module. This
7194 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7197 46. If there was a timeout during a "random" callout check, Exim treated it as
7198 a failure of the random address, and carried on sending RSET and the real
7199 address. If the delay was just some slowness somewhere, the response to the
7200 original RCPT would be taken as a response to RSET and so on, causing
7201 mayhem of various kinds.
7203 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7204 when I implemented it. It didn't allow for the fact that some option values
7205 may legitimately be negative (e.g. size_addition), and it didn't even do
7206 the right test for positive values.
7208 48. Domain names in DNS records are case-independent. Exim always looks them up
7209 in lower case. Some resolvers return domain names in exactly the case they
7210 appear in the zone file, that is, they may contain uppercase letters. Not
7211 all resolvers do this - some return always lower case. Exim was treating a
7212 change of case by a resolver as a change of domain, similar to a widening
7213 of a domain abbreviation. This triggered its re-routing code and so it was
7214 trying to route what was effectively the same domain again. This normally
7215 caused routing to fail (because the router wouldn't handle the domain
7216 twice). Now Exim checks for this case specially, and just changes the
7217 casing of the domain that it ultimately uses when it transmits the message
7220 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7223 50. If a filter generated a file delivery with a non-absolute name (possible if
7224 no home directory exists for the router), the forbid_file option was not
7227 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7228 the existing equality matching.
7230 52. Exim was using ints instead of ino_t variables in some places where it was
7231 dealing with inode numbers.
7233 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7234 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7235 called TMPDIR, and if it finds it is different, it changes its value.
7237 54. The smtp_printf() function is now made available to local_scan() so
7238 additional output lines can be written before returning. There is also an
7239 smtp_fflush() function to enable the detection of a dropped connection.
7240 The variables smtp_input and smtp_batched_input are exported to
7243 55. Changed the default runtime configuration: the message "Unknown user"
7244 has been removed from the ACL, and instead placed on the localuser router,
7245 using the cannot_route_message feature. This means that any verification
7246 failures that generate their own messages won't get overridden. Similarly,
7247 the "Unrouteable address" message that was in the ACL for unverifiable
7248 relay addresses has also been removed.
7250 56. Added hosts_avoid_esmtp to the smtp transport.
7252 57. The exicyclog script was not checking for the esoteric option
7253 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7254 will work only if exicyclog is run under the appropriate euid.
7256 58. Following a discussion on the list, the rules by which Exim recognises line
7257 endings on incoming messages have been changed. The -dropcr and drop_cr
7258 options are now no-ops, retained only for backwards compatibility. The
7259 following line terminators are recognized: LF CRLF CR. However, special
7260 processing applies to CR:
7262 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7263 nor a local message in the state where . is a terminator.
7265 (ii) If a bare CR is encountered in a header line, an extra space is added
7266 after the line terminator so as not to end the header. The reasoning
7267 behind this is that bare CRs in header lines are most likely either
7268 to be mistakes, or people trying to play silly games.
7270 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7271 was being incorrectly given as 18 bytes larger than it should have been.
7272 This is a VOB (very old bug).
7274 60. This may never have affected anything current, but just in case it has:
7275 When the local host is found other than at the start of a list of hosts,
7276 the local host, those with the same MX, and any that follow, are discarded.
7277 When the list in question was part of a longer list of hosts, the following
7278 hosts (not currently being processed) were also being discarded. This no
7279 longer happens. I'm not sure if this situation could ever has previously
7282 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7285 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7286 header. This is something that is recommended in a new Internet Draft, and
7287 is something that is documented as being done by Sendmail. There are two
7288 possible values. For messages generated by the autoreply transport, Exim
7291 Auto-Submitted: auto-replied
7293 whereas for all other generated messages (e.g. bounces) it adds
7295 Auto-Submitted: auto-generated
7297 63. The "personal" condition in filters now includes a test for the
7298 Auto-Submitted: header. If it contains the string "auto-" the message it
7299 not considered personal.
7301 64. Added rcpt_include_affixes as a generic transport option.
7303 65. Added queue_only_override (default true).
7305 66. Added the syslog_duplication option.
7307 67. If what should have been the first header line of a message consisted of
7308 a space followed by a colon, Exim was mis-interpreting it as a header line.
7309 It isn't of course - it is syntactically invalid and should therefore be
7310 treated as the start of the message body. The misbehaviour could have
7311 caused a number of strange effects, including loss of data in subsequent
7312 header lines, and spool format errors.
7314 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7315 client host had authenticated. This control can now be exercised by an ACL
7316 for more flexibility.
7318 69. By default, callouts do not happen when testing with -bh. There is now a
7319 variant, -bhc, which does actually run the callout code, including
7320 consulting and updating the callout cache.
7322 70. Added support for saslauthd authentication, courtesy of Alexander
7325 71. If statvfs() failed on the spool or log directories while checking their
7326 size for availability, Exim confusingly gave the error "space shortage".
7327 Furthermore, in debugging mode it crashed with a floating point exception.
7328 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7329 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7330 serious problem, Exim now writes to the main and panic logs when this
7331 happens, with details of the failure. It then refuses to accept the
7332 incoming message, giving the message "spool directory problem" or "log
7333 directory problem" with a 421 code for SMTP messages.
7335 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7336 0, 1, and 2 exist, because some OS complain for execs without them (see
7337 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7338 descriptors. However, the code omitted to check that the open succeeded,
7339 causing mysterious errors if for some reason the permissions on /dev/null
7340 got screwed. Now Exim writes a message to the main and panic logs, and
7341 bombs out if it can't open /dev/null.
7343 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7344 interact so that it is all more flexible. It is supposed to remain
7345 backwards compatible. Also added extra_local_interfaces.
7347 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7348 to bomb out with an assertion failure - to the client this appears as a
7349 connection drop. This problem occurs in the part of the code that was taken
7350 from the Samba project. Fortunately, the assertion is in a very simple
7351 function, so I have fixed this by reproducing the function inline in the
7352 one place where it is called, and arranging for authentication to fail
7353 instead of killing the process with assert().
7355 75. The SPA client code was not working when the server requested OEM rather
7356 than Unicode encoding.
7358 76. Added code to make require_files with a specific uid setting more usable in
7359 the case where statting the file as root fails - usually a non-root-mounted
7360 NFS file system. When this happens and the failure is EACCES, Exim now
7361 forks a subprocess and does the per-uid checking as the relevant uid.
7363 77. Added process_log_path.
7365 78. If log_file_path was not explicitly set, a setting of check_log_space or
7366 check_log_inodes was ignored.
7368 79. If a space check for the spool or log partitions fails, the incident is now
7369 logged. Of course, in the latter case the data may get lost...
7371 80. Added the %p formatting code to string_format() so that it can be used to
7372 print addresses in debug_print(). Adjusted all the address printing in the
7373 debugging in store.c to use %p rather than %d.
7375 81. There was a concern that a line of code in smtp_in.c could overflow a
7376 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7377 initially expressed, the concern was not well-founded, because trailing
7378 spaces are removed early. However, if the trailing spaces were followed by
7379 a NULL, they did not get removed, so the overflow was possible. Two fixes
7382 (a) I re-wrote the offending code in a cleaner fashion.
7383 (b) If an incoming SMTP command contains a NULL character, it is rejected
7386 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7387 runs initgroups(), so that if the Exim user is in any additional groups,
7388 they will be used during message reception.
7394 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob