1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917, OVE-20190718-0006)
17 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
18 buffer overrun for (non-chunking) other transports.
20 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
21 TLS1.3, means that a server rejecting a client certificate is not visible
22 to the client until the first read of encrypted data (typically the
23 response to EHLO). Add detection for that case and treat it as a failed
24 TLS connection attempt, so that the normal retry-in-clear can work (if
31 JH/01 Remove code calling the customisable local_scan function, unless a new
32 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
34 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
35 non-signal-safe functions being used.
37 JH/03 Bug 2269: When presented with a received message having a stupidly large
38 number of DKIM-Signature headers, disable DKIM verification to avoid
39 a resource-consumption attack. The limit is set at twenty.
41 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
42 report of oldest_pass in ${authres } in consequence, and separate out
43 some descriptions of reasons for verification fail.
45 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
46 files in the spool were present and unlocked. A queue-runner could spot
47 them, resulting in a duplicate delivery. Fix that by doing the unlock
48 after the unlink. Investigation by Tim Stewart. Take the opportunity to
49 add more error-checking on spoolfile handling while that code is being
52 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
53 No known attacks, no CVE, this is defensive hardening.
55 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
56 a queue-runner could start a delivery while other operations were ongoing.
57 Cutthrough delivery was a common victim, resulting in duplicate delivery.
58 Found and investigated by Tim Stewart. Fix by using the open message data
59 file handle rather than opening another, and not locally closing it (which
60 releases a lock) for that case, while creating the temporary .eml format
61 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
63 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
64 $sender_verify_failure/$recipient_verify_failure to "random".
66 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
69 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
70 Previously this would segfault.
72 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
75 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
76 like zero, since the resolver should be doing this for us, But we need one
77 as a CNAME but no MX presence gets the CNAME returned; we need to check
78 that doesn't point to an MX to declare it "no MX returned" rather than
79 "error, loop". A new main option is added so the older capability of
80 following some limited number of chain links is maintained.
82 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
84 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
85 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
86 now-deprecated earlier definitions used only specified the range up to TLS
87 1.2 (in the older-version library docs).
89 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
91 JH/15 Rework TLS client-side context management. Stop using a global, and
92 explicitly pass a context around. This enables future use of TLS for
93 connections to service-daemons (eg. malware scanning) while a client smtp
94 connection is using TLS; with cutthrough connections this is quite likely.
96 JH/16 Fix ARC verification to do AS checks in reverse order.
98 JH/17 Support a "tls" option on the ${readsocket } expansion item.
100 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
101 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
102 Previously the "utf8" would be re-prepended for every additional message.
104 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
105 Previously thery were accepted, resulting in issues when attempting to
106 forward messages to a non-supporting MTA.
108 PP/02 Let -n work with printing macros too, not just options.
110 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
111 one parent address was copied, and bogus data was used at delivery-logging
112 time. Either a crash (after delivery) or bogus log data could result.
113 Discovery and analysis by Tim Stewart.
115 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
116 Previously if the string ended mid-character, we did not insert the
117 promised '?' replacement.
119 PP/04 Documentation: current string operators work on bytes, not codepoints.
121 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
122 should pack well giving a smaller memory footprint so better caching and
123 therefore performance. Group the declarations where this can't be done so
124 that the byte-sized flag variables are not interspersed among pointer
125 variables, giving a better chance of good packing by the compiler.
127 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
128 non-null, to avoid issues with sites running BATV. Previously reports were
129 sent with an empty envelope sender so looked like bounces.
131 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
132 The ignore_error flag wasn't being returned from the filter subprocess so
133 was not set for later routers. Investigation and fix by Matthias Kurz.
135 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
136 and a msg:complete for the whole, when a message is manually removed using
137 -Mrm. Developement by Matthias Kurz, hacked on by JH.
139 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
140 a "Gnu special" function, asprintf() in the DB utility binary builds; I
141 hope that is portable enough.
143 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
144 requiring a known-CA anchor certificate; make it now rely entirely on the
145 TLSA as an anchor. Checking the name on the leaf cert against the name
146 on the A-record for the host is still done for TA (but not for EE mode).
148 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
149 included in delivery lines for non-proxied connections, when compiled with
150 SUPPORT_SOCKS and running with proxy logging enabled.
152 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
153 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
154 move the existing event to fire before the normal logging of message
155 failure so that custom logging is bracketed by normal logging.
157 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
158 msg:fail:internal event. Developement by Matthias Kurz.
160 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
161 far too small for todays use of crypto signatures stored there. Go all
162 the way to the max DNS message size of 64kB, even though this might be
163 overmuch for IOT constrained device use.
165 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
166 copy a string over itself. The library routine is documented as not
167 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
169 JH/32 For main options check_spool_space and check_inode_space, where the
170 platform supports 64b integers, support more than the previous 2^31 kB
171 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
172 the previous G, M, k.
174 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
175 $authenticated_fail_id variable on authentication failure. Previously
178 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
179 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
180 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
181 GNUTLS_SEC_PARAM_MEDIUM.
183 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
184 side. Previously we would continue as if no SNI had been received.
186 JH/36 Harden the handling of string-lists. When a list consisted of a sole
187 "<" character, which should be a list-separator specification, we walked
188 off past the nul-terimation.
190 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
191 causes) even when the retry time is not yet met. Previously they were
192 not, meaning that when (say) an account was over-quota and temp-rejecting,
193 and multiple senders' messages were queued, only one sender would get
194 notified on each configured delay_warning cycle.
196 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
198 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
199 cipher-suites, an error can be left on the stack even for a succeeding
200 accept; this results in impossible error messages when a later operation
203 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
204 return error codes indicating retry. Under TLS1.3 this becomes required.
206 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
207 it only wrote the new authenticators, resulting in a lack of tracking of
208 peer changes of ESMTP extensions until the next cache flush.
210 JH/41 Fix the loop reading a message header line to check for integer overflow,
211 and more-often against header_maxsize. Previously a crafted message could
212 induce a crash of the recive process; now the message is cleanly rejected.
214 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
215 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
221 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
222 When redis_servers is set to a list of > 1 element, and the Redis servers
223 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
224 case of MOVED into a DEFER case instead, thus moving the query onto the
225 next server in the list. For a cluster of N elements, all N servers must
226 be defined in redis_servers.
228 GF/02 Catch and remove uninitialized value warning in exiqsumm
229 Check for existence of @ARGV before looking at $ARGV[0]
231 JH/01 Replace the store_release() internal interface with store_newblock(),
232 which internalises the check required to safely use the old one, plus
233 the allocate and data copy operations duplicated in both (!) of the
234 extant use locations.
236 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
237 modifier. This matches the restriction on the commandline.
239 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
240 Previously only the last row was returned.
242 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
243 we assumed that tags in the header were well-formed, and parsed the
244 element content after inspecting only the first char of the tag.
245 Assumptions at that stage could crash the receive process on malformed
248 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
249 While running the DKIM ACL we operate on the Permanent memory pool so that
250 variables created with "set" persist to the DATA ACL. Also (at any time)
251 DNS lookups that fail create cache records using the Permanent pool. But
252 expansions release any allocations made on the current pool - so a dnsdb
253 lookup expansion done in the DKIM ACL releases the memory used for the
254 DNS negative-cache, and bad things result. Solution is to switch to the
255 Main pool for expansions.
256 While we're in that code, add checks on the DNS cache during store_reset,
257 active in the testsuite.
258 Problem spotted, and debugging aided, by Wolfgang Breyha.
260 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
261 When none of the hosts presented to a transport match an already-open
262 connection, close it and proceed with the list. Previously we would
263 queue the message. Spotted by Lena with Yahoo, probably involving
266 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
267 Previously a spurious "250 OK id=" response was appended to the proper
270 JH/08 The "support for" informational output now, which built with Content
271 Scanning support, has a line for the malware scanner interfaces compiled
272 in. Interface can be individually included or not at build time.
274 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
275 by the template makefile "src/EDITME". The "STREAM" support for an older
276 ClamAV interface method is removed.
278 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
279 rows affected is given instead).
281 JH/11 The runtime Berkeley DB library version is now additionally output by
282 "exim -d -bV". Previously only the compile-time version was shown.
284 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
285 SMTP connection. Previously, when one had more receipients than the
286 first, an abortive onward connection was made. Move to full support for
287 multiple onward connections in sequence, handling cutthrough connection
288 for all multi-message initiating connections.
290 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
291 routers. Previously, a multi-recipient message would fail to match the
292 onward-connection opened for the first recipient, and cause its closure.
294 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
295 a timeout on read on a GnuTLS initiating connection, resulting in the
296 initiating connection being dropped. This mattered most when the callout
297 was marked defer_ok. Fix to keep the two timeout-detection methods
300 JH/15 Relax results from ACL control request to enable cutthrough, in
301 unsupported situations, from error to silently (except under debug)
302 ignoring. This covers use with PRDR, frozen messages, queue-only and
305 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
307 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
308 metadata, resulting in a crash in free().
310 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
311 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
312 Broken also in d185889f4, with init system revamp.
314 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
315 Previously we abruptly closed the connection after reading a malware-
316 found indication; now we go on to read the "scan ok" response line,
319 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
320 ACL. Previously, a crash would result.
322 JH/19 Speed up macro lookups during configuration file read, by skipping non-
323 macro text after a replacement (previously it was only once per line) and
324 by skipping builtin macros when searching for an uppercase lead character.
326 JH/20 DANE support moved from Experimental to mainline. The Makefile control
327 for the build is renamed.
329 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
330 was allocated for every new TLS startup, meaning one per message. Fix
331 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
333 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
334 reported the original. Fix to report (as far as possible) the ACL
335 result replacing the original.
337 JH/23 Fix memory leak during multi-message connections using STARTTLS under
338 OpenSSL. Certificate information is loaded for every new TLS startup,
339 and the resources needed to be freed.
341 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
343 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
346 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
347 DATA response info to the (existing) per-recipient response info for
348 the "C=" log element. It can have useful tracking info from the
349 destination system. Patch from Simon Arlott.
351 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
352 length value. Previously this would segfault.
354 HS/02 Support Avast multiline protoocol, this allows passing flags to
355 newer versions of the scanner.
357 JH/28 Ensure that variables possibly set during message acceptance are marked
358 dead before release of memory in the daemon loop. This stops complaints
359 about them when the debug_store option is enabled. Discovered specifically
360 for sender_rate_period, but applies to a whole set of variables.
361 Do the same for the queue-runner and queue-list loops, for variables set
362 from spool message files. Do the same for the SMTP per-message loop, for
363 certain variables indirectly set in ACL operations.
365 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
366 as a multi-recipient message from a mailinglist manager). The coding had
367 an arbitrary cutoff number of characters while checking for more input;
368 enforced by writing a NUL into the buffer. This corrupted long / fast
369 input. The problem was exposed more widely when more pipelineing of SMTP
370 responses was introduced, and one Exim system was feeding another.
371 The symptom is log complaints of SMTP syntax error (NUL chars) on the
372 receiving system, and refused recipients seen by the sending system
373 (propating to people being dropped from mailing lists).
374 Discovered and pinpointed by David Carter.
376 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
377 replaced by the ${authresults } expansion.
379 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
381 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
382 allows proper process termination in container environments.
384 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
385 Previously the "final dot" had a newline after it; ensure it is CR,LF.
387 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
388 and "err_perm", deprecated since 4.83 when the RFC-defined words
389 "temperror" and "permerror" were introduced.
391 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
392 transport-filters or DKIM-signing. The restriction was lost in the
393 consolidation of verify-callout and delivery SMTP handling.
394 Extend the restriction to also cover ARC-signing.
396 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
397 in defer=pass mode supply a 450 to the initiator. Previously the message
400 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
401 tls_require_ciphers is used as before.
403 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
404 "pass_unscanned". Only tmpfails from the scanner are written to
405 the paniclog, as they may require admin intervention (permission
406 denied, license issues). Other scanner errors (like decompression
407 bombs) do not cause a paniclog entry.
409 JH/36 Fix reinitialisation of DKIM logging variable between messages.
410 Previously it was possible to log spurious information in receive log
413 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
414 triggered odd behaviour from Outlook Express clients.
416 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
419 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
420 since the IETF WG has not yet settled on that versus the original
421 "bare" representation.
423 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
424 Previously the millisecond value corrupted the output.
425 Fix also for syslog_pid=no and log_selector +pid, for which the pid
426 corrupted the output.
432 JH/01 Rework error string handling in TLS interface so that the caller in
433 more cases is responsible for logging. This permits library-sourced
434 string to be attached to addresses during delivery, and collapses
435 pairs of long lines into single ones.
437 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
438 during configuration. Wildcards are allowed and expanded.
440 JH/02 Rework error string handling in DKIM to pass more info back to callers.
441 This permits better logging.
443 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
444 do not close it down and have the child transport start it up again on
445 the passed-on TCP connection. Instead, proxy the child (and any
446 subsequent ones) for TLS via a unix-domain socket channel. Logging is
447 affected: the continued delivery log lines do not have any DNSSEC, TLS
448 Certificate or OCSP information. TLS cipher information is still logged.
450 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
451 identical IP addresses on different listening ports. Will also affect
454 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
455 add noisy ifdef guards to special-case this sillyness.
456 Patch from Bernd Kuhls.
458 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
459 than 255 are no longer allowed.
461 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
462 Disable the session-cache too, which might reduce our load. Since we
463 currrectly use a new context for every connection, both as server and
464 client, there is no benefit for these.
465 GnuTLS appears to not support tickets server-side by default (we don't
466 call gnutls_session_ticket_enable_server()) but client side is enabled
467 by default on recent versions (3.1.3 +) unless the PFS priority string
470 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
471 <https://reproducible-builds.org/specs/source-date-epoch/>.
473 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
474 the check for any unsuccessful recipients did not notice the limit, and
475 erroneously found still-pending ones.
477 JH/08 Pipeline CHUNKING command and data together, on kernels that support
478 MSG_MORE. Only in-clear (not on TLS connections).
480 JH/09 Avoid using a temporary file during transport using dkim. Unless a
481 transport-filter is involved we can buffer the headers in memory for
482 creating the signature, and read the spool data file once for the
483 signature and again for transmission.
485 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
486 4.77 as the kernel support then wasn't solid, having issues in 64bit
487 mode. Now, it's been long enough. Add support for FreeBSD also.
489 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
490 case where the routing stage had gathered several addresses to send to
491 a host before calling the transport for the first, we previously failed
492 to close down TLS in the old transport process before passing the TCP
493 connection to the new process. The new one sent a STARTTLS command
494 which naturally failed, giving a failed delivery and bloating the retry
495 database. Investigation and fix prototype from Wolfgang Breyha.
497 JH/12 Fix check on SMTP command input synchronisation. Previously there were
498 false-negatives in the check that the sender had not preempted a response
499 or prompt from Exim (running as a server), due to that code's lack of
500 awareness of the SMTP input buffering.
502 PP/04 Add commandline_checks_require_admin option.
503 Exim drops privileges sanely, various checks such as -be aren't a
504 security problem, as long as you trust local users with access to their
505 own account. When invoked by services which pass untrusted data to
506 Exim, this might be an issue. Set this option in main configuration
507 AND make fixes to the calling application, such as using `--` to stop
510 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
511 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
512 responses to those, into a single TLS record each way (this usually means
513 a single packet). As a side issue, smtp_enforce_sync now works on TLS
516 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
517 affects you only if you're dancing at the edge of the param size limits.
518 If you are, and this message makes sense to you, then: raise the
519 configured limit or use OpenSSL 1.1. Nothing we can do for older
522 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
523 cmdline element to get the documented default one. Previously it was
526 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
527 are unsuable for non-message-specific reasons - eg. connection timeout,
528 banner-time rejection.
530 JH/16 Fix logging of delivery remote port, when specified by router, under
533 PP/06 Repair manualroute's ability to take options in any order, even if one
534 is the name of a transport.
537 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
539 JH/17 Change the list-building routines interface to use the expanding-string
540 triplet model, for better allocation and copying behaviour.
542 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
543 Previously it was constructed the first time a possibly-matching string
544 was met in the configuration file input during startup; now it is done
547 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
548 compatible one, to avoid the (poorly documented) possibility of a config
549 file in the working directory redirecting the DB files, possibly correpting
550 some existing file. CVE-2017-10140 assigned for BDB.
552 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
553 cache-hot. Previously, although the result was properly cached, the
554 initial verify call returned a defer.
556 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
557 the main verify for receipient in uncached-mode.
559 JH/22 Retire historical build files to an "unsupported" subdir. These are
560 defined as "ones for which we have no current evidence of testing".
562 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
563 if present. Previously it was ignored.
565 JH/24 Start using specified-initialisers in C structure init coding. This is
566 a C99 feature (it's 2017, so now considered safe).
568 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
569 if was a fixed-sized field and bitmask ops via macros; it is now more
572 PP/07 GitHub PR 56: Apply MariaDB build fix.
573 Patch provided by Jaroslav Škarvada.
575 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
576 during Coverity cleanups [4.87 JH/47]
577 Diagnosis and fix provided by Michael Fischer v. Mollard.
579 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
580 the right size to place the terminating semicolon on its own folded
581 line, the header hash was calculated to an incorrect value thanks to
582 the (relaxed) space the fold became.
584 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
585 and confused the parent.
587 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
588 which could crash as a result. This could lead to undeliverable messages.
590 JH/28 Logging: "next input sent too soon" now shows where input was truncated
593 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
594 matters on fast-turnover and PID-randomising systems, which were getting
595 out-of-order delivery.
597 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
598 a possibly-overlapping copy. The symptom was that "Remote host closed
599 connection in response to HELO" was logged instead of the actual 4xx
602 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
603 Previously only that bufferd was discarded, resulting in SYMTP command
606 JH/32 DKIM: when a message has multiple signatures matching an identity given
607 in dkim_verify_signers, run the dkim acl once for each. Previously only
608 one run was done. Bug 2189.
610 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
611 "panic the current process" to "deliberately defer". The panic log is
612 still written with the problem list name; the mail and reject logs now
613 get a temp-reject line for the message that was being handled, saying
614 something like "domains check lookup or other defer". The SMTP 451
615 message is still "Temporary local problem".
617 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
618 A crafted sequence of BDAT commands could result in in-use memory beeing
619 freed. CVE-2017-16943.
621 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
622 from SMTP input. Previously it was always done; now only done for DATA
623 and not BDAT commands. CVE-2017-16944.
625 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
626 to the message (such as an overlong header line). Previously this was
627 not done and we did not exit BDAT mode. Followon from the previous item
628 though a different problem.
634 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
635 than -2003 did; needs libidn2 in addition to libidn.
637 JH/02 The path option on a pipe transport is now expanded before use.
639 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
640 Patch provided by "Björn", documentation fix added too.
642 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
643 missing a wire-to-host endian conversion.
645 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
646 close after a BDAT command line could be taken as a following command,
647 giving a synch failure. Fix by only checking for synch immediately
648 before acknowledging the chunk.
650 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
651 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
652 macro. Patches provided by Josh Soref.
654 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
655 Previously we did not; the RFC seems ambiguous and VRFY is not listed
656 by IANA as a service extension. However, John Klensin suggests that we
659 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
660 the dkim code may be unix-mode line endings rather than smtp wire-format
661 CRLF, so prepend a CR to any bare LF.
663 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
664 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
666 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
667 the first were themselves being wrongly included in the feed into dkim
668 processing; with most chunk sizes in use this resulted in an incorrect
669 body hash calculated value.
671 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
672 DKIM signature block, for verification. Although advised against by
673 standards it is specifically not ruled illegal.
675 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
677 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
678 missing a body hash (the bh= tag).
680 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
681 It seems that HAProxy sends the Proxy Protocol information in clear and
682 only then does a TLS startup, so do the same.
684 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
685 TCP connections (such as for Spamd) unless the daemon successfully set
686 Fast Open mode on its listening sockets. This fixes breakage seen on
687 too-old kernels or those not configured for Fast Open, at the cost of
688 requiring both directions being enabled for TFO, and TFO never being used
689 by non-daemon-related Exim processes.
691 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
692 endings, at least on the first header line. Try to canonify any that get
693 past that check, despite the cost.
695 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
696 now limited to an arbitrary five deep, while parsing addresses with the
697 strip_excess_angle_brackets option enabled.
699 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
700 instead leave the unprompted TLS handshake in socket buffer for the
701 TLS library to consume.
703 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
705 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
707 JH/16 Drop variables when they go out of scope. Memory management drops a whole
708 region in one operation, for speed, and this leaves assigned pointers
709 dangling. Add checks run only under the testsuite which checks all
710 variables at a store-reset and panics on a dangling pointer; add code
711 explicitly nulling out all the variables discovered. Fixes one known
712 bug: a transport crash, where a dangling pointer for $sending_ip_address
713 originally assigned in a verify callout, is re-used.
715 PP/06 Drop '.' from @INC in various Perl scripts.
717 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
719 PP/08 Reduce a number of compilation warnings under clang; building with
720 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
721 should be warning-free.
723 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
725 HS/01 Fix portability problems introduced by PP/08 for platforms where
726 realloc(NULL) is not equivalent to malloc() [SunOS et al].
728 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
729 chunk. This allows us to accept broken chunked messages. We need a more
730 general solution here.
732 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
733 already-broken messages in the queue.
735 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
737 JH/19 Fix reference counting bug in routing-generated-address tracking.
743 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
744 supports it and a size is available (ie. the sending peer gave us one).
746 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
747 years of being deprecated). The replacements are the ACLs
748 acl_smtp_mime and acl_not_smtp_mime.
750 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
751 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
752 or even an in-clear connection were permitted. Now, if the host lookup
753 was dnssec and dane was requested then the host is only used if the
754 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
755 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
756 if one fails this test.
757 This means that a poorly-configured remote DNS will make it incommunicado;
758 but it protects against a DNS-interception attack on it.
760 JH/04 Bug 1810: make continued-use of an open smtp transport connection
761 non-noisy when a race steals the message being considered.
763 JH/05 If main configuration option tls_certificate is unset, generate a
764 self-signed certificate for inbound TLS connections.
766 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
767 in rewrites and routers.
769 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
770 and logged a warning sing 4.83; now they are a configuration file error.
772 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
773 (lacking @domain). Apply the same qualification processing as RCPT.
775 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
777 JH/10 Support ${sha256:} applied to a string (as well as the previous
780 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
781 a cutthrough deliver is pending, as we always want to make a connection.
782 This also avoids re-routing the message when later placing the cutthrough
783 connection after a verify cache hit.
784 Do not update it with the verify result either.
786 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
787 when routing results in more than one destination address.
789 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
790 signing (which inhibits the cutthrough capability). Previously only
791 the presence of an option was tested; now an expansion evaluating as
792 empty is permissible (obviously it should depend only on data available
793 when the cutthrough connection is made).
795 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
796 the relevant preceding SMTP command did not note the pipelining mode.
798 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
799 Previously they were not counted.
801 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
802 as one having no matching records. Previously we deferred the message
803 that needed the lookup.
805 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
806 distinguished as "(=".
808 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
809 for missing MX records. Previously it only worked for missing A records.
811 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
813 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
814 after the data-go-ahead and data-ack. Patch from Jason Betts.
816 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
817 even for a "none" policy. Patch from Tony Meyer.
819 JH/22 Fix continued use of a connection for further deliveries. If a port was
820 specified by a router, it must also match for the delivery to be
823 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
824 When one of the recipients of a message was unsuitable for the connection
825 (has no matching addresses), we lost track of needing to mark it
826 deferred. As a result mail would be lost.
828 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
830 JH/25 Decoding ACL controls is now done using a binary search; the source code
831 takes up less space and should be simpler to maintain. Merge the ACL
832 condition decode tables also, with similar effect.
834 JH/26 Fix problem with one_time used on a redirect router which returned the
835 parent address unchanged. A retry would see the parent address marked as
836 delivered, so not attempt the (identical) child. As a result mail would
839 JH/27 Fix a possible security hole, wherein a process operating with the Exim
840 UID can gain a root shell. Credit to http://www.halfdog.net/ for
841 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
844 JH/28 Enable {spool,log} filesystem space and inode checks as default.
845 Main config options check_{log,spool}_{inodes,space} are now
846 100 inodes, 10MB unless set otherwise in the configuration.
848 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
849 Previously it only applied to the main-section connection policy
852 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
854 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
855 by me. Added RFC7919 DH primes as an alternative.
857 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
858 are not in the system include path.
860 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
861 GnuTLS, when a session startup failed (eg because the client disconnected)
862 Exim did stdio operations after fclose. This was exposed by a recent
863 change which nulled out the file handle after the fclose.
865 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
866 signed directly by the cert-signing cert, rather than an intermediate
867 OCSP-signing cert. This is the model used by LetsEncrypt.
869 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
871 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
872 an incoming connection.
874 HS/02 Bug 1802: Do not half-close the connection after sending a request
877 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
878 fallback to "prime256v1".
880 JH/34 SECURITY: Use proper copy of DATA command in error message.
881 Could leak key material. Remotely exploitable. CVE-2016-9963.
887 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
888 and 3.4.4 - once the server is enabled to respond to an OCSP request
889 it does even when not requested, resulting in a stapling non-aware
890 client dropping the TLS connection.
892 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
893 support variable-length bit vectors. No functional change.
895 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
896 The I= interface field on outgoing lines is now after the H= remote
897 host field, same as incoming lines. There is a separate
898 outgoing_interface log selector which allows you to disable the
901 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
902 If not running log_selector +smtp_connection the mainlog would be held
903 open indefinitely after a "too many connections" event, including to a
904 deleted file after a log rotate. Leave the per net connection logging
905 leaving it open for efficiency as that will be quickly detected by the
906 check on the next write.
908 HS/01 Bug 1671: Fix post transport crash.
909 Processing the wait-<transport> messages could crash the delivery
910 process if the message IDs didn't exist for some reason. When
911 using 'split_spool_directory=yes' the construction of the spool
912 file name failed already, exposing the same netto behaviour.
914 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
915 mime_regex ACL conditions.
917 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
918 to DSN fail messages (bounces): remote IP, remote greeting, remote response
919 to HELO, local diagnostic string.
921 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
922 log line to debug. Even when configured with a tls authenticator many
923 client connections are expected to not authenticate in this way, so
924 an authenticate fail is not an error.
926 HS/02 Add the Exim version string to the process info. This way exiwhat
927 gives some more detail about the running daemon.
929 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
930 matter for fast-change records such as DNSBLs.
932 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
933 retry record, even if constant. There may be multiple transports with
934 different interface settings and the retry behaviour needs to be kept
937 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
939 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
941 JH/10 Bug 840: fix log_defer_output option of pipe transport
943 JH/11 Bug 830: use same host for all RCPTS of a message, even under
944 hosts_randomize. This matters a lot when combined with mua_wrapper.
946 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
947 ${quote_pgsql:<string>} operator.
949 JH/13 Bug 1708: avoid misaligned access in cached lookup.
951 JH/14 Change header file name for freeradius-client. Relevant if compiling
952 with Radius support; from the Gentoo tree and checked under Fedora.
954 JH/15 Bug 1712: Introduce $prdr_requested flag variable
956 JH/16 Bug 1714: Permit an empty string as expansion result for transport
957 option transport_filter, meaning no filtering.
959 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
961 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
962 defaults to "*" (all hosts). The variable is now available when not built
963 with TLS, default unset, mainly to enable keeping the testsuite sane.
964 If a server certificate is not supplied (via tls_certificate) an error is
965 logged, and clients will find TLS connections fail on startup. Presumably
966 they will retry in-clear.
967 Packagers of Exim are strongly encouraged to create a server certificate
968 at installation time.
970 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
971 with the $config_file variable.
973 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
974 in transport context, after the attempt, and per-recipient. The latter type
975 is per host attempted. The event data is the error message, and the errno
976 information encodes the lookup type (A vs. MX) used for the (first) host,
977 and the trailing two digits of the smtp 4xx response.
979 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
980 to write to mainlog (or rejectlog, paniclog) in the window between file
981 creation and permissions/ownership being changed. Particularly affects
982 installations where exicyclog is run as root, rather than exim user;
983 result is that the running daemon panics and dies.
985 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
987 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
988 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
989 "pri" and "weight". Note that the previous implicit priority given by the
990 list order is no longer honoured.
992 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
995 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
996 by defining SUPPORT_SOCKS.
998 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
999 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1000 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1001 variables are renamed to proxy_{local,external}_{address,port}.
1003 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1004 for a build by defining SUPPORT_I18N
1006 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1007 of the query string, and make ${quote_redis:} do that quoting.
1009 JH/29 Move Events support from Experimental to mainline, enabled by default
1010 and removable for a build by defining DISABLE_EVENT.
1012 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1014 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1015 cached by the daemon.
1017 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1018 by defining LOOKUP_REDIS. The libhiredis library is required.
1020 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1021 keys are given for lookup.
1023 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1024 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1025 only supported when built with TLS support. The PolarSSL SHA routines
1026 are still used when the TLS library is too old for convenient support.
1028 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1029 openssl_options), for security. OpenSSL forces this from version 1.1.0
1030 server-side so match that on older versions.
1032 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1033 allocation for $value could be released as the expansion processing
1034 concluded, but leaving the global pointer active for it.
1036 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1037 and to use the domains and local_parts ACL conditions.
1039 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1040 incorrectly not doubled on cutthrough transmission, hence seen as a
1041 body-termination at the receiving system - resulting in truncated mails.
1042 Commonly the sender saw a TCP-level error, and retransmitted the message
1043 via the normal store-and-forward channel. This could result in duplicates
1044 received - but deduplicating mailstores were liable to retain only the
1045 initial truncated version.
1047 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1049 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1051 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1052 we're in there, support oversigning also; bug 1309.
1054 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1056 HS/04 Add support for keep_environment and add_environment options.
1058 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1059 either intentional arithmetic overflow during PRNG, or testing config-
1062 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1063 delivery resulted in actual delivery. Cancel cutthrough before DATA
1066 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1067 rejects a recipient: pass the reject to the originator.
1069 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1070 Many were false-positives and ignorable, but it's worth fixing the
1073 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1074 for the new environment-manipulation done at startup. Move the routines
1075 from being local to tls.c to being global via the os.c file.
1077 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1078 an extract embedded as result-arg for a map, the first arg for extract
1079 is unavailable so we cannot tell if this is a numbered or keyed
1080 extraction. Accept either.
1086 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1089 JH/02 The smtp transport option "multi_domain" is now expanded.
1091 JH/03 The smtp transport now requests PRDR by default, if the server offers
1094 JH/04 Certificate name checking on server certificates, when exim is a client,
1095 is now done by default. The transport option tls_verify_cert_hostnames
1096 can be used to disable this per-host. The build option
1097 EXPERIMENTAL_CERTNAMES is withdrawn.
1099 JH/05 The value of the tls_verify_certificates smtp transport and main options
1100 default to the word "system" to access the system default CA bundle.
1101 For GnuTLS, only version 3.0.20 or later.
1103 JH/06 Verification of the server certificate for a TLS connection is now tried
1104 (but not required) by default. The verification status is now logged by
1105 default, for both outbound TLS and client-certificate supplying inbound
1108 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1111 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1112 Status Notification (bounce) messages are now MIME format per RFC 3464.
1113 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1114 under the control of the dsn_advertise_hosts option, and routers may
1115 have a dsn_lasthop option.
1117 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1118 default, modifiable by a malware= option. The list separator for
1119 the options can now be changed in the usual way. Bug 68.
1121 JH/10 The smtp_receive_timeout main option is now expanded before use.
1123 JH/11 The incoming_interface log option now also enables logging of the
1124 local interface on delivery outgoing connections.
1126 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1127 if the interface and destination host and port all match.
1129 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1132 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1133 Patch from Andrew Lewis.
1135 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1136 now supports optional time-restrictions, weighting, and priority
1137 modifiers per server. Patch originally by <rommer@active.by>.
1139 JH/16 The spamd_address main option now supports a mixed list of local
1140 and remote servers. Remote servers can be IPv6 addresses, and
1141 specify a port-range.
1143 JH/17 Bug 68: The spamd_address main option now supports an optional
1144 timeout value per server.
1146 JH/18 Bug 1581: Router and transport options headers_add/remove can
1147 now have the list separator specified.
1149 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1152 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1155 JH/21 Support for the A6 type of dns record is withdrawn.
1157 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1158 rather than the verbs used.
1160 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1161 from 255 to 1024 chars.
1163 JH/24 Verification callouts now attempt to use TLS by default.
1165 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1166 are generic router options now. The defaults didn't change.
1168 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1169 Original patch from Alexander Shikoff, worked over by JH.
1171 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1172 files if ZCAT_COMMAND is not executable.
1174 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1176 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1178 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1179 Normally benign, it bites when the pair was led to by a CNAME;
1180 modern usage is to not canonicalize the domain to a CNAME target
1181 (and we were inconsistent anyway for A-only vs AAAA+A).
1183 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1185 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1186 when evaluating $sender_host_dnssec.
1188 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1189 $sender_helo_dnssec variable.
1191 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1193 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1195 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1197 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1198 documented as working, but never had. Support all but $spam_report.
1200 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1201 added for tls authenticator.
1203 HS/03 Add perl_taintmode main config option
1209 TL/01 When running the test suite, the README says that variables such as
1210 no_msglog_check are global and can be placed anywhere in a specific
1211 test's script, however it was observed that placement needed to be near
1212 the beginning for it to behave that way. Changed the runtest perl
1213 script to read through the entire script once to detect and set these
1214 variables, reset to the beginning of the script, and then run through
1215 the script parsing/test process like normal.
1217 TL/02 The BSD's have an arc4random API. One of the functions to induce
1218 adding randomness was arc4random_stir(), but it has been removed in
1219 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1220 function when detected.
1222 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1223 cause callback expansion.
1225 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1226 syntax errors in an expansion can be treated as a string instead of
1227 logging or causing an error, due to the internal use of bool_lax
1228 instead of bool when processing it.
1230 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1231 server certificates when making smtp deliveries.
1233 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1235 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1237 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1239 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1240 Merged patch from Sebastian Wiedenroth.
1242 JH/05 Fix results-pipe from transport process. Several recipients, combined
1243 with certificate use, exposed issues where response data items split
1244 over buffer boundaries were not parsed properly. This eventually
1245 resulted in duplicates being sent. This issue only became common enough
1246 to notice due to the introduction of connection certificate information,
1247 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1249 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1250 size buffer was used, resulting in syntax errors when an expansion
1253 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1254 version 3.3.6 or later.
1256 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1257 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1258 both become "event_action", the variables become $event_name, $event_data
1259 and $event_defer_errno. There is a new variable $verify_mode, usable in
1260 routers, transports and related events. The tls:cert event is now also
1261 raised for inbound connections, if the main configuration event_action
1264 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1265 early OCSP support, but no stapling (appears to be less than 1.0.0).
1267 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1268 server certificate names available under the smtp transport option
1269 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1272 JH/10 Time-related extraction expansions from certificates now use the main
1273 option "timezone" setting for output formatting, and are consistent
1274 between OpenSSL and GnuTLS compilations. Bug 1541.
1276 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1277 encoded parameter in the incoming message. Bug 1558.
1279 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1280 include certificate info, eximon was claiming there were spoolfile
1283 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1285 JH/14 Log delivery-related information more consistently, using the sequence
1286 "H=<name> [<ip>]" wherever possible.
1288 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1289 are problematic for Debian distribution, omit them from the release
1292 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1294 JH/16 Fix string representation of time values on 64bit time_t architectures.
1297 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1298 output list separator was used.
1303 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1304 checkers that were complaining about end of non-void function with no
1307 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1308 This was a regression introduced in 4.83 by another bugfix.
1310 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1312 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1313 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1319 TF/01 Correctly close the server side of TLS when forking for delivery.
1321 When a message was received over SMTP with TLS, Exim failed to clear up
1322 the incoming connection properly after forking off the child process to
1323 deliver the message. In some situations the subsequent outgoing
1324 delivery connection happened to have the same fd number as the incoming
1325 connection previously had. Exim would try to use TLS and fail, logging
1326 a "Bad file descriptor" error.
1328 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1329 utilities have not been installed.
1331 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1332 temporary space as the ACL may create new global variables.
1334 TL/01 LDAP support uses per connection or global context settings, depending
1335 upon the detected version of the libraries at build time.
1337 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1338 to extract and use the src ip:port in logging and expansions as if it
1339 were a direct connection from the outside internet. PPv2 support was
1340 updated based on HAProxy spec change in May 2014.
1342 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1344 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1345 Properly escape header and check for NULL return.
1347 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1350 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1352 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1353 characters in header names, implemented as a verify condition.
1354 Contributed by Michael Fischer v. Mollard.
1356 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1357 results permerror and temperror. Previous values are deprecated but
1358 still accepted. In a future release, err_perm and err_temp will be
1359 completely removed, which will be a backward incompatibility if the
1360 ACL tests for either of these two old results. Patch contributed by
1361 user bes-internal on the mailing list.
1363 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1365 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1366 selectors, in both main and reject logs.
1368 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1371 JH/07 Add malware type "sock" for talking to simple daemon.
1373 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1375 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1376 routers/transports under cutthrough routing.
1378 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1379 numbers. Touch up "bool" conditional to keep the same definition.
1381 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1383 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1385 JH/12 Expand items in router/transport headers_add or headers_remove lists
1386 individually rather than the list as a whole. Bug 1452.
1388 Required for reasonable handling of multiple headers_ options when
1389 they may be empty; requires that headers_remove items with embedded
1390 colons must have them doubled (or the list-separator changed).
1392 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1393 view the policy declared in the DMARC record. Currently, $dmarc_status
1394 is a combined value of both the record presence and the result of the
1397 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1399 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1400 dnslookup router and the smtp transport (applying to the forward
1403 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1404 of ldap servers used for a specific lookup. Patch provided by Heiko
1407 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1408 New variable $lookup_dnssec_authenticated for observability.
1410 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1411 Patch submitted by Lars Timman.
1413 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1415 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1416 Requires trusted mode and valid format message id, aborts otherwise.
1417 Patch contributed by Heiko Schlichting.
1419 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1420 certextract with support for various fields. Bug 1358.
1422 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1423 is requested by default, modifiable by smtp transport option
1426 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1427 operate on certificate variables to give certificate fingerprints
1428 Also new ${sha256:cert_variable}.
1430 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1432 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1433 Christian Aistleitner.
1435 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1437 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1438 file. Patch from Wolfgang Breyha.
1440 JH/25 Expand the coverage of the delivery $host and $host_address to
1441 client authenticators run in verify callout. Bug 1476.
1443 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1444 align with daemon_smtp_ports. Bug 72.
1446 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1447 support and error reporting did not work properly.
1449 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1450 and is readable. Patch from Andrew Colin Kissa.
1452 TL/14 Enhance documentation of ${run expansion and how it parses the
1453 commandline after expansion, particularly in the case when an
1454 unquoted variable expansion results in an empty value.
1456 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1458 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1459 by renaming away from it. Addresses GH issue 15, reported by
1462 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1464 TL/15 SECURITY: prevent double expansion in math comparison functions
1465 (can expand unsanitized data). Not remotely exploitable.
1472 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1474 PP/02 Make -n do something, by making it not do something.
1475 When combined with -bP, the name of an option is not output.
1477 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1480 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1481 $sender_host_name and config options to manage this, and basic check
1484 PP/05 DSCP support for outbound connections and control modifier for inbound.
1486 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1487 (Only plugin which currently uses this is kerberos4, which nobody should
1488 be using, but we should make it available and other future plugins might
1489 conceivably use it, even though it would break NAT; stuff *should* be
1490 using channel bindings instead).
1492 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1493 name; added for Sendmail compatibility; requires admin caller.
1494 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1495 just ignore it); requires trusted caller.
1496 Also parse but ignore: -Ac -Am -X<logfile>
1499 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1501 TL/02 Add +smtp_confirmation as a default logging option.
1503 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1504 Patch by Magnus Holmgren from 2007-02-20.
1506 TL/04 Bugzilla 1281 - Spec typo.
1507 Bugzilla 1283 - Spec typo.
1508 Bugzilla 1290 - Spec grammar fixes.
1510 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1512 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1514 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1515 mailing list by by Dmitry Isaikin.
1517 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1519 JH/02 Support "G" suffix to numbers in ${if comparisons.
1521 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1523 NM/01 Bugzilla 1197 - Spec typo
1524 Bugzilla 1196 - Spec examples corrections
1526 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1528 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1529 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1532 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1533 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1535 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1536 "acl {{name}{arg}...}", and optional args on acl condition
1539 JH/05 Permit multiple router/transport headers_add/remove lines.
1541 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1543 JH/07 Avoid using a waiting database for a single-message-only transport.
1544 Performance patch from Paul Fisher. Bugzilla 1262.
1546 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1549 JH/09 Add $headers_added variable, with content from use of ACL modifier
1550 add_header (but not yet added to the message). Bugzilla 199.
1552 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1553 Pulled from Bugzilla 817 by Wolfgang Breyha.
1555 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1557 (nb: this is the same fix as in Exim 4.80.1)
1559 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1562 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1565 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1567 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1568 advertise SMTP AUTH mechanism to us, instead of a generic
1569 protocol violation error. Also, make Exim more robust to bad
1570 data from the Dovecot auth socket.
1572 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1574 When a queue runner is handling a message, Exim first routes the
1575 recipient addresses, during which it prunes them based on the retry
1576 hints database. After that it attempts to deliver the message to
1577 any remaining recipients. It then updates the hints database using
1580 So if a recipient address works intermittently, it can get repeatedly
1581 deferred at routing time. The retry hints record remains fresh so the
1582 address never reaches the final cutoff time.
1584 This is a fairly common occurrence when a user is bumping up against
1585 their storage quota. Exim had some logic in its local delivery code
1586 to deal with this. However it did not apply to per-recipient defers
1587 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1589 This change adds a proper retry rule check during routing so that the
1590 final cutoff time is checked against the message's age. We only do
1591 this check if there is an address retry record and there is not a
1592 domain retry record; this implies that previous attempts to handle
1593 the address had the retry_use_local_parts option turned on. We use
1594 this as an approximation for the destination being like a local
1595 delivery, as in LMTP.
1597 I suspect this new check makes the old local delivery cutoff check
1598 redundant, but I have not verified this so I left the code in place.
1600 TF/02 Correct gecos expansion when From: is a prefix of the username.
1602 Test 0254 submits a message to Exim with the header
1606 When I ran the test suite under the user fanf2, Exim expanded
1607 the header to contain my full name, whereas it should have added
1608 a Resent-Sender: header. It erroneously treats any prefix of the
1609 username as equal to the username.
1611 This change corrects that bug.
1613 GF/01 DCC debug and logging tidyup
1614 Error conditions log to paniclog rather than rejectlog.
1615 Debug lines prefixed by "DCC: " to remove any ambiguity.
1617 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1619 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1620 Bug spotted by Jeremy Harris; was flawed since initial commit.
1621 Would have resulted in OCSP responses post-SNI triggering an Exim
1622 NULL dereference and crash.
1624 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1626 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1627 Bug detection, analysis and fix by Samuel Thibault.
1628 Bugzilla 1331, Debian bug #698092.
1630 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1632 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1633 Server implementation by Todd Lyons, client by JH.
1634 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1635 config variable "prdr_enable" controls whether the server
1636 advertises the facility. If the client requests PRDR a new
1637 acl_data_smtp_prdr ACL is called once for each recipient, after
1638 the body content is received and before the acl_smtp_data ACL.
1639 The client is controlled by both of: a hosts_try_prdr option
1640 on the smtp transport, and the server advertisement.
1641 Default client logging of deliveries and rejections involving
1642 PRDR are flagged with the string "PRDR".
1644 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1645 fclose(). Diagnosis by Todd Lyons.
1647 PP/17 Update configure.default to handle IPv6 localhost better.
1648 Patch by Alain Williams (plus minor tweaks).
1651 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1652 This is now consistent with GnuTLS, and is now documented: the
1653 previous undocumented portable approach to treating the option as
1654 unset was to force an expansion failure. That still works, and
1655 an empty string is now equivalent.
1657 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1658 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1659 not performing validation itself.
1661 PP/20 Added force_command boolean option to pipe transport.
1662 Patch from Nick Koston, of cPanel Inc.
1664 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1667 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1669 PP/21 Fix eximon continuous updating with timestamped log-files.
1670 Broken in a format-string cleanup in 4.80, missed when I repaired the
1671 other false fix of the same issue.
1672 Report and fix from Heiko Schlichting.
1675 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1676 Report from Prashanth Katuri.
1678 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1679 It's SecureTransport, so affects any MacOS clients which use the
1680 system-integrated TLS libraries, including email clients.
1682 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1683 using a MIME ACL for non-SMTP local injection.
1684 Report and assistance in diagnosis by Warren Baker.
1686 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1688 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1690 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1691 last id that failed so it may be referenced in subsequent ACL's.
1693 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1696 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1697 ldap library initialization, allowing self-signed CA's to be
1698 used. Also properly sets require_cert option later in code by
1699 using NULL (global ldap config) instead of ldap handle (per
1700 session). Bug diagnosis and testing by alxgomz.
1702 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1703 the src/util/ subdirectory.
1705 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1706 renamed to Transport Post Delivery Action by Jeremy Harris, as
1709 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1710 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1711 redis_servers = needs to be configured which will be used by the redis
1712 lookup. Patch from Warren Baker, of The Packet Hub.
1714 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1716 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1717 hostname or reverse DNS when processing a host list. Used suggestions
1718 from multiple comments on this bug.
1720 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1722 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1723 Missed a few lines, added it to make the runtest require no keyboard
1726 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1727 contains upper case chars. Make router use caseful_local_part.
1729 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1730 support when GnuTLS has been built with p11-kit.
1736 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1738 This, or similar/improved, will also be change PP/11 of 4.82.
1744 PP/01 Handle short writes when writing local log-files.
1745 In practice, only affects FreeBSD (8 onwards).
1746 Bugzilla 1053, with thanks to Dmitry Isaikin.
1748 NM/01 Bugzilla 949 - Documentation tweak
1750 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1753 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1755 PP/02 Implemented gsasl authenticator.
1757 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1759 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1760 `pkg-config foo` for cflags/libs.
1762 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1763 with rest of GSASL and with heimdal_gssapi.
1765 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1766 `pkg-config foo` for cflags/libs for the TLS implementation.
1768 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1769 properties get this fed in as external SSF. A number of robustness
1770 and debugging improvements to the cyrus_sasl authenticator.
1772 PP/08 cyrus_sasl server now expands the server_realm option.
1774 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1775 Patch by Jeremy Harris.
1777 PP/10 Added dbmjz lookup type.
1779 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1781 PP/12 MAIL args handles TAB as well as SP, for better interop with
1782 non-compliant senders.
1783 Analysis and variant patch by Todd Lyons.
1785 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1786 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1787 Patch from Dirk Mueller <dmueller@suse.com>
1789 PP/13 tls_peerdn now print-escaped for spool files.
1790 Observed some $tls_peerdn in wild which contained \n, which resulted
1791 in spool file corruption.
1793 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1794 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1795 or write after TLS renegotiation, which otherwise led to messages
1798 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1799 as a tracking header (ie: a signed header comes before the signature).
1800 Patch from Wolfgang Breyha.
1802 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1803 comma-sep list; embedded commas doubled.
1805 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1807 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1809 Report and patch from Dmitry Banschikov.
1811 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1812 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1813 failures. We appear to now support TLS1.1+ with Exim.
1815 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1816 lets Exim select keys and certificates based upon TLS SNI from client.
1817 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1818 before an outbound SMTP session. New log_selector, +tls_sni.
1820 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1821 NULL dereference. Report and patch from Alun Jones.
1823 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1824 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1825 Not seeing resolver debug output on NetBSD, but suspect this is a
1826 resolver implementation change.
1828 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1829 Left warnings. Added "eximon gdb" invocation mode.
1831 PP/21 Defaulting "accept_8bitmime" to true, not false.
1833 PP/22 Added -bw for inetd wait mode support.
1835 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1836 locate the relevant includes and libraries. Made this the default.
1838 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1839 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1841 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1842 This may cause build issues on older platforms.
1844 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1845 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1846 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1847 Added SNI support via GnuTLS too.
1848 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1850 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1852 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1853 Applied second patch from Janne, implementing suggestion to default
1854 multiple-strings-in-record handling to match SPF spec.
1856 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1858 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1859 read-only, out of scope).
1860 Patch from Wolfgang Breyha, report from Stuart Northfield.
1862 PP/29 Fix three issues highlighted by clang analyser static analysis.
1863 Only crash-plausible issue would require the Cambridge-specific
1864 iplookup router and a misconfiguration.
1865 Report from Marcin Mirosław.
1867 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1869 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1870 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1871 As part of this, removing so much warning spew let me fix some minor
1872 real issues in debug logging.
1874 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1875 assignment on my part. Fixed.
1877 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1878 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1879 Janne Snabb (who went above and beyond: thank you).
1881 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1882 string otherwise requires a connection and a bunch more work and it's
1883 relatively easy to get wrong. Should also expose TLS library linkage
1886 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1887 64-bit ${eval} (JH/03).
1889 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1890 GNU libc to support some of the 64-bit stuff, should not lead to
1891 conflicts. Defined before os.h is pulled in, so if a given platform
1892 needs to override this, it can.
1894 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1895 protection layer was required, which is not implemented.
1896 Bugzilla 1254, patch from Wolfgang Breyha.
1898 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1899 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1900 tls_dhparam take prime identifiers. Also unbreak combination of
1901 OpenSSL+DH_params+TLSSNI.
1903 PP/39 Disable SSLv2 by default in OpenSSL support.
1909 PP/01 Solaris build fix for Oracle's LDAP libraries.
1910 Bugzilla 1109, patch from Stephen Usher.
1912 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1914 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1917 TF/02 Fix a couple more cases where we did not log the error message
1918 when unlink() failed. See also change 4.74-TF/03.
1920 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1921 lock up or crash if it happened to be inside a call to libc when it
1922 got a SIGUSR1 from exiwhat.
1924 The SIGUSR1 handler appends the current process status to the process
1925 log which is later printed by exiwhat. It used to use the general
1926 purpose logging code to do this, but several functions it calls are
1927 not safe for signals.
1929 The new output code in the SIGUSR1 handler is specific to the process
1930 log, and simple enough that it's easy to inspect for signal safety.
1931 Removing some special cases also simplifies the general logging code.
1932 Removing the spurious timestamps from the process log simplifies
1935 TF/04 Improved ratelimit ACL condition.
1937 The /noupdate option has been deprecated in favour of /readonly which
1938 has clearer semantics. The /leaky, /strict, and /readonly update modes
1939 are mutually exclusive. The update mode is no longer included in the
1940 database key; it just determines when the database is updated. (This
1941 means that when you upgrade Exim will forget old rate measurements.)
1943 Exim now checks that the per_* options are used with an update mode that
1944 makes sense for the current ACL. For example, when Exim is processing a
1945 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1946 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1947 must specify per_mail/readonly. If you omit the update mode it defaults to
1948 /leaky where that makes sense (as before) or /readonly where required.
1950 The /noupdate option is now undocumented but still supported for
1951 backwards compatibility. It is equivalent to /readonly except that in
1952 ACLs where /readonly is required you may specify /leaky/noupdate or
1953 /strict/noupdate which are treated the same as /readonly.
1955 A useful new feature is the /count= option. This is a generalization
1956 of the per_byte option, so that you can measure the throughput of other
1957 aggregate values. For example, the per_byte option is now equivalent
1958 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1960 The per_rcpt option has been generalized using the /count= mechanism
1961 (though it's more complicated than the per_byte equivalence). When it is
1962 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1963 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1964 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1965 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1966 Note that using per_rcpt with a non-readonly update mode in more than
1967 one ACL will cause the recipients to be double-counted. (The per_mail
1968 and per_byte options don't have this problem.)
1970 The handling of very low rates has changed slightly. If the computed rate
1971 is less than the event's count (usually one) then this event is the first
1972 after a long gap. In this case the rate is set to the same as this event's
1973 count, so that the first message of a spam run is counted properly.
1975 The major new feature is a mechanism for counting the rate of unique
1976 events. The new per_addr option counts the number of different
1977 recipients that someone has sent messages to in the last time period. It
1978 behaves like per_rcpt if all the recipient addresses are different, but
1979 duplicate recipient addresses do not increase the measured rate. Like
1980 the /count= option this is a general mechanism, so the per_addr option
1981 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1982 example, measure the rate that a client uses different sender addresses
1983 with the options per_mail/unique=$sender_address. There are further
1984 details in the main documentation.
1986 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1988 TF/06 Removed a few PCRE remnants.
1990 TF/07 Automatically extract Exim's version number from tags in the git
1991 repository when doing development or release builds.
1993 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1994 Bugzilla 879. Patch from Paul Fisher.
1996 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1997 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2000 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2002 PP/05 Variable $av_failed, true if the AV scanner deferred.
2003 Bugzilla 1078. Patch from John Horne.
2005 PP/06 Stop make process more reliably on build failure.
2006 Bugzilla 1087. Patch from Heiko Schlittermann.
2008 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2009 Bugzilla 1089. Patch from Heiko Schlittermann.
2011 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2012 Bugzilla 1131. Patch from Holger Weiß.
2014 PP/09 Handle IPv6 addresses with SPF.
2015 Bugzilla 860. Patch from Wolfgang Breyha.
2017 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2019 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2022 PP/11 match_* no longer expand right-hand-side by default.
2023 New compile-time build option, EXPAND_LISTMATCH_RHS.
2024 New expansion conditions, "inlist", "inlisti".
2026 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2028 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2030 PP/14 fix log_write() format string regression from TF/03.
2031 Bugzilla 1152. Patch from Dmitry Isaikin.
2037 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2039 PP/02 Harmonised TLS library version reporting; only show if debugging.
2040 Layout now matches that introduced for other libraries in 4.74 PP/03.
2042 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2044 PP/04 New "dns_use_edns0" global option.
2046 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2049 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2050 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2052 TK/01 Updated PolarSSL code to 0.14.2.
2053 Bugzilla 1097. Patch from Andreas Metzler.
2055 PP/07 Catch divide-by-zero in ${eval:...}.
2056 Fixes bugzilla 1102.
2058 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2061 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2062 format-string attack -- SECURITY: remote arbitrary code execution.
2064 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2065 time unintentionally subject to list matching rules, letting the header
2066 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2067 arbitrary string expansion). This allowed for information disclosure.
2069 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2070 INT_MIN/-1 -- value coerced to INT_MAX.
2076 NM/01 Workaround for PCRE version dependency in version reporting
2079 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2080 This fixes portability to compilers other than gcc, notably
2081 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2083 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2084 makefiles for portability to HP-UX and POSIX correctness.
2086 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2087 Also via indented variable definition in the Makefile.
2088 (Debugging by Oliver Heesakkers).
2090 PP/02 Restore caching of spamd results with expanded spamd_address.
2091 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2093 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2094 Improves build reliability. Fix from: Frank Elsner
2096 NM/02 Fix wide character breakage in the rfc2047 coding
2097 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2099 NM/03 Allow underscore in dnslist lookups
2100 Fixes bug 1026. Patch from Graeme Fowler
2102 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2103 Code patches from Adam Ciarcinski of NetBSD.
2105 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2108 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2109 is logged, to avoid truncation. Patch from John Horne.
2111 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2112 Patch from Jakob Hirsch.
2114 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2115 SQL string expansion failure details.
2116 Patch from Andrey Oktyabrski.
2118 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2119 Patch from Simon Arlott.
2121 PP/09 New lookups functionality failed to compile on old gcc which rejects
2122 extern declarations in function scope.
2123 Patch from Oliver Fleischmann
2125 PP/10 Use sig_atomic_t for flags set from signal handlers.
2126 Check getgroups() return and improve debugging.
2127 Fixed developed for diagnosis in bug 927 (which turned out to be
2130 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2131 Patch from Mark Zealey.
2133 PP/12 Bugzilla 1056: Improved spamd server selection.
2134 Patch from Mark Zealey.
2136 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2137 Based on patch from Heiko Schlittermann.
2139 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2140 Patch from Uwe Doering, sign-off by Michael Haardt.
2142 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2143 variable declaration deep within a block. Bug and patch from
2146 PP/15 lookups-Makefile IRIX compatibility coercion.
2148 PP/16 Make DISABLE_DKIM build knob functional.
2150 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2151 Patch by Simon Arlott
2153 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2154 variable argument macros. Our copy now differs from upstream.
2160 TF/01 Failure to get a lock on a hints database can have serious
2161 consequences so log it to the panic log.
2163 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2164 controlled using the smtp_confirmation log selector.
2166 TF/03 Include the error message when we fail to unlink a spool file.
2168 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2169 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2170 for maintaining out-of-tree patches for some time.
2172 PP/01 Bugzilla 139: Documentation and portability issues.
2173 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2174 Handle per-OS dynamic-module compilation flags.
2176 PP/02 Let /dev/null have normal permissions.
2177 The 4.73 fixes were a little too stringent and complained about the
2178 permissions on /dev/null. Exempt it from some checks.
2179 Reported by Andreas M. Kirchwitz.
2181 PP/03 Report version information for many libraries, including
2182 Exim version information for dynamically loaded libraries. Created
2183 version.h, now support a version extension string for distributors
2184 who patch heavily. Dynamic module ABI change.
2186 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2187 privilege escalation vulnerability whereby the Exim run-time user
2188 can cause root to append content of the attacker's choosing to
2191 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2194 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2195 If dropping privileges for untrusted macros, we disabled normal logging
2196 on the basis that it would fail; for the Exim run-time user, this is not
2197 the case, and it resulted in successful deliveries going unlogged.
2198 Fixed. Reported by Andreas Metzler.
2204 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2205 only prepend for the Resent-* case. Fixes regression introduced in
2206 Exim 4.70 by NM/22 for Bugzilla 607.
2208 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2209 increasing numbers of administrators be bitten by this.
2211 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2213 PP/03 Bugzilla 994: added openssl_options main configuration option.
2215 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2217 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2219 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2221 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2222 without a peer certificate, leading to a segfault because of an
2223 assumption that peers always have certificates. Be a little more
2224 paranoid. Problem reported by Martin Tscholak.
2226 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2227 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2228 NB: ClamAV planning to remove STREAM in "middle of 2010".
2229 CL also introduces -bmalware, various -d+acl logging additions and
2230 more caution in buffer sizes.
2232 PP/09 Implemented reverse_ip expansion operator.
2234 PP/10 Bugzilla 937: provide a "debug" ACL control.
2236 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2238 PP/12 Bugzilla 973: Implement --version.
2240 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2242 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2244 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2246 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2247 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2248 ignore trailing whitespace.
2250 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2252 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2255 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2256 Notification from Dr Andrew Aitchison.
2258 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2259 ExtendedDetectionInfo response format.
2260 Notification from John Horne.
2262 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2265 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2266 XSL and documented dependency on system catalogs, with examples of how
2269 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2272 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2273 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2274 configuration file which is writeable by the Exim user or group.
2276 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2277 of configuration files to cover files specified with the -C option if
2278 they are going to be used with root privileges, not just the default
2281 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2282 option (effectively making it always true).
2284 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2285 files to be used while preserving root privileges.
2287 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2288 that rogue child processes cannot use them.
2290 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2291 run-time user, instead of root.
2293 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2294 Exim run-time user without dropping privileges.
2296 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2297 result string, instead of calling string_vformat() twice with the same
2300 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2301 for other users. Others should always drop root privileges if they use
2302 -C on the command line, even for a whitelisted configure file.
2304 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2306 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2312 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2313 $data_path, and $header_path variables; fixed documentation bugs and
2316 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2317 exipick to access non-standard spools, including the "frozen" queue
2320 NM/01 Bugzilla 965: Support mysql stored procedures.
2321 Patch from Alain Williams
2323 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2325 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2326 Patch from Andreas Metzler
2328 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2329 Patch from Kirill Miazine
2331 NM/05 Bugzilla 671: Added umask to procmail example.
2333 JJ/03 installed exipick 20100323.0, fixing doc bug
2335 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2336 directory. Notification and patch from Dan Rosenberg.
2338 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2340 TK/02 Improve log output when DKIM signing operation fails.
2342 MH/01 Treat the transport option dkim_domain as a colon separated
2343 list, not as a single string, and sign the message with each element,
2344 omitting multiple occurences of the same signer.
2346 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2347 Bugzilla 985, 986. Patch by Simon Arlott
2349 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2350 Patch by Simon Arlott
2352 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2353 MBX locking. Notification from Dan Rosenberg.
2359 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2361 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2363 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2365 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2367 NM/04 Bugzilla 915: Flag broken perl installation during build.
2373 TK/01 Added patch by Johannes Berg that expands the main option
2374 "spamd_address" if it starts with a dollar sign.
2376 TK/02 Write list of recipients to X-Envelope-Sender header when building
2377 the mbox-format spool file for content scanning (suggested by Jakob
2380 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2381 (http://www.dcc-servers.net/) support via dccifd. Activated by
2382 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2384 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2385 by Mark Daniel Reidel <mr@df.eu>.
2387 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2388 When building exim an external PCRE library is now needed -
2389 PCRE is a system library on the majority of modern systems.
2390 See entry on PCRE_LIBS in EDITME file.
2392 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2393 conversation. Added nologin parameter to request.
2394 Patch contributed by Kirill Miazine.
2396 TF/01 Do not log submission mode rewrites if they do not change the address.
2398 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2400 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2401 log files in place. Contributed by Roberto Lima.
2403 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2405 TF/03 Bugzilla 615: When checking the local_parts router precondition
2406 after a local_part_suffix or local_part_prefix option, Exim now
2407 does not use the address's named list lookup cache, since this
2408 contains cached lookups for the whole local part.
2410 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2411 Robert Millan. Documentation is in experimental-spec.txt.
2413 TF/04 Bugzilla 668: Fix parallel build (make -j).
2415 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2417 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2418 Patch provided by Jan Srzednicki.
2420 TF/05 Leading white space used to be stripped from $spam_report which
2421 wrecked the formatting. Now it is preserved.
2423 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2424 that they are available at delivery time.
2426 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2428 TF/08 TLS error reporting now respects the incoming_interface and
2429 incoming_port log selectors.
2431 TF/09 Produce a more useful error message if an SMTP transport's hosts
2432 setting expands to an empty string.
2434 NM/06 Bugzilla 744: EXPN did not work under TLS.
2435 Patch provided by Phil Pennock.
2437 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2438 Patch provided by Richard Godbee.
2440 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2441 acl_smtp_notquit, added index entry.
2443 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2444 Patch provided by Eugene Bujak.
2446 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2447 accept(). Patch provided by Maxim Dounin.
2449 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2450 Patch provided by Phil Pennock.
2452 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2454 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2455 Patch provided by Brad "anomie" Jorsch.
2457 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2458 Patch provided by Dean Brooks.
2460 TK/05 Add native DKIM support (does not depend on external libraries).
2462 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2463 Patch provided by Graeme Fowler.
2465 NM/16 Bugzilla 851: Documentation example syntax fix.
2467 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2469 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2472 NM/19 Bugzilla 745: TLS version reporting.
2473 Patch provided by Phil Pennock.
2475 NM/20 Bugzilla 167: bool: condition support.
2476 Patch provided by Phil Pennock.
2478 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2479 clients. Patch provided by Phil Pennock.
2481 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2482 Patch provided by Brad "anomie" Jorsch.
2484 NM/23 Bugzilla 687: Fix misparses in eximstats.
2485 Patch provided by Heiko Schlittermann.
2487 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2488 Patch provided by Heiko Schlittermann.
2490 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2491 plus update to original patch.
2493 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2495 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2496 Patch provided by David Brownlee.
2498 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2500 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2502 NM/30 Bugzilla 888: TLS documentation bugfixes.
2504 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2506 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2507 Unlike the original bugzilla I have changed all shell scripts in src tree.
2509 NM/33 Bugzilla 898: Transport filter timeout fix.
2510 Patch by Todd Rinaldo.
2512 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2513 Patch by Serge Demonchaux.
2515 NM/35 Bugzilla 39: Base64 decode bug fixes.
2516 Patch by Jakob Hirsch.
2518 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2520 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2522 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2524 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2530 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2531 ALT-N's libdkim that I have put here:
2532 http://duncanthrax.net/exim-experimental/
2534 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2535 were called 'true' and it seems that C99 defines that as a reserved
2536 keyword to be used with 'bool' variable types. That means you could
2537 not include C99-style headers which use bools without triggering
2538 build errors in sieve.c.
2540 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2541 as mailq or other aliases. Changed the --help handling significantly
2542 to do whats expected. exim_usage() emits usage/help information.
2544 SC/01 Added the -bylocaldomain option to eximstats.
2546 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2548 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2550 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2556 PH/01 Another patch from the Sieve maintainer.
2558 PH/02 When an IPv6 address is converted to a string for single-key lookup
2559 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2560 dots are used instead of colons so that keys in lsearch files need not
2561 contain colons. This was done some time before quoting was made available
2562 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2563 (notated using the quote facility) so as to distinguish them from IPv4
2564 keys. This meant that lookups for IP addresses in host lists did not work
2565 for iplsearch lookups.
2567 This has been fixed by arranging for IPv6 addresses to be expressed with
2568 colons if the lookup type is iplsearch. This is not incompatible, because
2569 previously such lookups could never work.
2571 The situation is now rather anomalous, since one *can* have colons in
2572 ordinary lsearch keys. However, making the change in all cases is
2573 incompatible and would probably break a number of configurations.
2575 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2578 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2579 conversion specification without a maximum field width, thereby enabling
2580 a rogue spamd server to cause a buffer overflow. While nobody in their
2581 right mind would setup Exim to query an untrusted spamd server, an
2582 attacker that gains access to a server running spamd could potentially
2583 exploit this vulnerability to run arbitrary code as the Exim user.
2585 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2586 $primary_hostname instead of what libspf2 thinks the hosts name is.
2588 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2589 a directory entry by the name of the lookup key. Previously, if a
2590 symlink pointed to a non-existing file or a file in a directory that
2591 Exim lacked permissions to read, a lookup for a key matching that
2592 symlink would fail. Now it is enough that a matching directory entry
2593 exists, symlink or not. (Bugzilla 503.)
2595 PH/03 The body_linecount and body_zerocount variables are now exported in the
2598 PH/04 Added the $dnslist_matched variable.
2600 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2601 This means they are set thereafter only if the connection becomes
2604 PH/06 Added the client_condition to authenticators so that some can be skipped
2605 by clients under certain conditions.
2607 PH/07 The error message for a badly-placed control=no_multiline_responses left
2608 "_responses" off the end of the name.
2610 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2612 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2613 (without spaces) instead of just copying the configuration text.
2615 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2617 PH/11 Added $max_received_linelength.
2619 PH/12 Added +ignore_defer and +include_defer to host lists.
2621 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2622 way in which PCRE > 7.0 is built.
2624 PH/14 Implemented queue_only_load_latch.
2626 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2627 MAIL command. The effect was to mangle the value on 64-bit systems.
2629 PH/16 Another patch from the Sieve maintainer.
2631 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2633 PH/18 If a system quota error occurred while trying to create the file for
2634 a maildir delivery, the message "Mailbox is full" was not appended to the
2635 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2636 only to a quota excession during the actual writing of the file.
2638 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2639 characters?) which causes problems in log lines. The DN values are now
2640 passed through string_printing() before being added to log lines.
2642 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2643 and InterBase are left for another time.)
2645 PH/21 Added message_body_newlines option.
2647 PH/22 Guard against possible overflow in moan_check_errorcopy().
2649 PH/23 POSIX allows open() to be a macro; guard against that.
2651 PH/24 If the recipient of an error message contained an @ in the local part
2652 (suitably quoted, of course), incorrect values were put in $domain and
2653 $local_part during the evaluation of errors_copy.
2659 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2660 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2663 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2664 issue a MAIL command.
2666 PH/02 In an ACL statement such as
2668 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2670 if a client was not listed at all, or was listed with a value other than
2671 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2672 the condition was not true (as it should be), so access was not denied.
2673 The bug was that the ! inversion was incorrectly passed on to the second
2674 item. This has been fixed.
2676 PH/03 Added additional dnslists conditions == and =& which are different from
2677 = and & when the dns lookup returns more than one IP address.
2679 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2680 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2682 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2683 FSYNC, which compiles an option called disable_fsync that allows for
2684 bypassing fsync(). The documentation is heavily laced with warnings.
2686 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2688 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2689 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2690 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2691 including adding "make clean"; (3) Added -fPIC when compiling the test
2692 dynamically loaded module, to get rid of a warning.
2694 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2695 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2696 = 0s. The bug is otherwise harmless.
2698 PH/07 There was a bug in the dovecot authenticator such that the value of
2699 $auth1 could be overwritten, and so not correctly preserved, after a
2700 successful authentication. This usually meant that the value preserved by
2701 the server_setid option was incorrect.
2703 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2705 PH/09 Installed PCRE release 7.0.
2707 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2708 run for batched SMTP input. It is now run at the start of every message
2709 in the batch. While fixing this I discovered that the process information
2710 (output by running exiwhat) was not always getting set for -bs and -bS
2711 input. This is fixed, and it now also says "batched" for BSMTP.
2713 PH/11 Added control=no_pipelining.
2715 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2716 patch, slightly modified), and move the expansion of helo_data till after
2717 the connection is made in the smtp transport (so it can use these
2720 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2722 PH/14 Added log_selector = +pid.
2724 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2726 PH/16 Add ${if forany and ${if forall.
2728 PH/17 Added dsn_from option to vary the From: line in DSNs.
2730 PH/18 Flush SMTP output before performing a callout, unless control =
2731 no_callout_flush is set.
2733 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2734 was true (the default) a successful delivery failed to delete the retry
2735 item, thus causing premature timeout of the address. The bug is now
2738 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2740 PH/21 Long custom messages for fakedefer and fakereject are now split up
2741 into multiline responses in the same way that messages for "deny" and
2742 other ACL rejections are.
2744 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2745 with slight modification.
2747 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2748 draft, changing the syntax and factoring some duplicate code".
2750 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2751 for deliveries of the second and subsequent messages over the same SMTP
2754 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2755 ${reduce, with only minor "tidies".
2757 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2759 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2760 expansion side effects.
2762 PH/27 When a message times out after an over-quota error from an Exim-imposed
2763 quota, the bounce message says "mailbox is full". This message was not
2764 being given when it was a system quota that was exceeded. It now should
2767 MH/03 Made $recipients available in local_scan(). local_scan() already has
2768 better access to the recipient list through recipients_list[], but
2769 $recipients can be useful in postmaster-provided expansion strings.
2771 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2772 in the case of a MAIL command with additional options following the
2773 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2774 were accidentally chopped off.
2776 PH/29 SMTP synchronization checks are implemented when a command is read -
2777 there is a check that no more input is waiting when there shouldn't be
2778 any. However, for some commands, a delay in an ACL can mean that it is
2779 some time before the response is written. In this time, more input might
2780 arrive, invalidly. So now there are extra checks after an ACL has run for
2781 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2782 pipelining has not been advertised.
2784 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2786 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2787 returned in the SMTP response when smtp_return_error_details was false.
2788 This has been fixed.
2790 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2791 instead of the C I/O that was originally supplied, because problems were
2792 reported on Solaris.
2794 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2795 Exim which did not show up earlier: it was assuming that a call to
2796 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2797 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2798 was a macro that became an assignment, so it seemed to work. This has
2799 changed to a proper function call with a void return, hence the compile
2800 error. Exim's code has been fixed.
2802 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2805 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2807 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2809 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2810 because it turns out to be too big or there is a timeout) there is no
2811 "Completed" line in the log. When some messages of this type were
2812 selected by exigrep, they were listed as "not completed". Others were
2813 picked up by some special patterns. I have improved the selection
2814 criteria to be more general.
2816 PH/38 The host_find_failed option in the manualroute router can now be set
2817 to "ignore", to completely ignore a host whose IP address cannot be
2818 found. If all hosts are ignored, the behaviour is controlled by the new
2819 host_all_ignored option.
2821 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2822 homing or because of multiple MX records with /mx) generated more than
2823 one IP address, and the following item turned out to be the local host,
2824 all the secondary addresses of the first item were incorrectly removed
2825 from the list, along with the local host and any following hosts (which
2826 is what is supposed to happen).
2828 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2829 whoever called Exim into the -H file. In the case of the daemon it was
2830 behaving confusingly. When first started, it used values for whoever
2831 started the daemon, but after a SIGHUP it used the Exim user (because it
2832 calls itself on a restart). I have changed the code so that it now always
2835 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2836 message are rejected with the same error (e.g. no authentication or bad
2837 sender address), and a DATA command is nevertheless sent (as can happen
2838 with PIPELINING or a stupid MUA), the error message that was given to the
2839 RCPT commands is included in the rejection of the DATA command. This is
2840 intended to be helpful for MUAs that show only the final error to their
2843 PH/42 Another patch from the Sieve maintainer.
2845 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2846 Eximstats - Fixed some broken HTML links and added missing column headers
2848 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2849 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2851 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2853 PH/43 Yet another patch from the Sieve maintainer.
2855 PH/44 I found a way to check for a TCP/IP connection going away before sending
2856 the response to the final '.' that terminates a message, but only in the
2857 case where the client has not sent further data following the '.'
2858 (unfortunately, this is allowed). However, in many cases there won't be
2859 any further data because there won't be any more messages to send. A call
2860 to select() can be used: if it shows that the input is "ready", there is
2861 either input waiting, or the socket has been closed. An attempt to read
2862 the next input character can distinguish the two cases. Previously, Exim
2863 would have sent an OK response which the client would never have see.
2864 This could lead to message repetition. This fix should cure that, at
2865 least in a lot of common cases.
2867 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2868 advertised in response to EHLO.
2874 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2875 fixed by 4.65/MH/01 (is this a record?) are fixed:
2877 (i) An empty string was always treated as zero by the numeric comparison
2878 operators. This behaviour has been restored.
2880 (ii) It is documented that the numeric comparison operators always treat
2881 their arguments as decimal numbers. This was broken in that numbers
2882 starting with 0 were being interpreted as octal.
2884 While fixing these problems I realized that there was another issue that
2885 hadn't been noticed. Values of message_size_limit (both the global option
2886 and the transport option) were treated as octal if they started with 0.
2887 The documentation was vague. These values are now always treated as
2888 decimal, and I will make that clear in the documentation.
2894 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2895 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2898 MH/01 Don't check that the operands of numeric comparison operators are
2899 integers when their expansion is in "skipping" mode (fixes bug
2900 introduced by 4.64-PH/07).
2902 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2903 child addresses, Exim now panics and dies. Previously, because the count
2904 is held in a short int, deliveries were likely to be lost. As such a
2905 large number of recipients for a single message is ridiculous
2906 (performance will be very, very poor), I have chosen to impose a limit
2907 rather than extend the field.
2913 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2914 leftover -K file (the existence of which was triggered by #402).
2915 While we were at it, introduced process PID as part of the -K
2916 filename. This should rule out race conditions when creating
2919 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2920 processing considerably. Previous code took too long for large mails,
2921 triggering a timeout which in turn triggers #401.
2923 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2924 in the DK code in transports.c. sendfile() is not really portable,
2925 hence the _LINUX specificness.
2927 TF/01 In the add_headers option to the mail command in an Exim filter,
2928 there was a bug that Exim would claim a syntax error in any
2929 header after the first one which had an odd number of characters
2932 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2933 callout verification, Exim cached a "reject" for the entire domain. This
2934 is correct for most verifications, but it is not correct for a recipient
2935 verification with use_sender or use_postmaster set, because in that case
2936 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2937 case of MAIL FROM:<> rejection from other early rejections (e.g.
2938 rejection of HELO). When verifying a recipient using a non-null MAIL
2939 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2940 Whatever the result of the callout, the value of the domain cache is
2941 left unchanged (for any other kind of callout, getting as far as trying
2942 RCPT means that the domain itself is ok).
2944 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2947 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2948 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2949 session, the daemon ignores ECONNECT errors and logs others; it now
2950 ignores EPIPE as well.
2952 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2953 (quoted-printable decoding).
2955 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2956 later the small subsequent patch to fix an introduced bug.
2958 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2960 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2962 PH/08 An error is now given if message_size_limit is specified negative.
2964 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2965 to be given (somewhat) arbitrary names.
2967 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2970 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2971 miscellaneous code fixes
2973 PH/10 Added the log_reject_target ACL modifier to specify where to log
2976 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2977 hostname. This is wrong, because it relates to the incoming message (and
2978 probably the interface on which it is arriving) and not to the outgoing
2979 callout (which could be using a different interface). This has been
2980 changed to use the value of the helo_data option from the smtp transport
2981 instead - this is what is used when a message is actually being sent. If
2982 there is no remote transport (possible with a router that sets up host
2983 addresses), $smtp_active_hostname is used.
2985 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2986 tweaks were necessary in order to get it to work (see also 21 below):
2987 (a) The code assumed that strncpy() returns a negative number on buffer
2988 overflow, which isn't the case. Replaced with Exim's string_format()
2990 (b) There were several signed/unsigned issues. I just did the minimum
2991 hacking in of casts. There is scope for a larger refactoring.
2992 (c) The code used strcasecmp() which is not a standard C function.
2993 Replaced with Exim's strcmpic() function.
2994 (d) The code set only $1; it now sets $auth1 as well.
2995 (e) A simple test gave the error "authentication client didn't specify
2996 service in request". It would seem that Dovecot has changed its
2997 interface. Fortunately there's a specification; I followed it and
2998 changed what the client sends and it appears to be working now.
3000 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3003 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3004 address A is aliased to B and C, where B exists and C does not. Without
3005 -v the output is "A verified" because verification stops after a
3006 successful redirection if more than one address is generated. However,
3007 with -v the child addresses are also verified. Exim was outputting "A
3008 failed to verify" and then showing the successful verification for C,
3009 with its parentage. It now outputs "B failed to verify", showing B's
3010 parentage before showing the successful verification of C.
3012 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3013 look up a TXT record in a specific list after matching in a combined
3016 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3017 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3018 they consult the DNS. I had assumed they would set it the way they
3019 wanted; and indeed my experiments on Linux seem to show that in some
3020 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3021 To be on the safe side, however, I have now made the interface to
3022 host_find_byname() similar to host_find_bydns(), with an argument
3023 containing the DNS resolver options. The host_find_byname() function now
3024 sets these options at its start, just as host_find_bydns() does. The smtp
3025 transport options dns_qualify_single and dns_search_parents are passed to
3026 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3027 of host_find_byname() use the default settings of RES_DEFNAMES
3028 (qualify_single) but not RES_DNSRCH (search_parents).
3030 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3031 spool_read_header() do less string testing, by means of a preliminary
3032 switch on the second character of optional "-foo" lines. (This is
3033 overdue, caused by the large number of possibilities that now exist.
3034 Originally there were few.) While I was there, I also converted the
3035 str(n)cmp tests so they don't re-test the leading "-" and the first
3036 character, in the hope this might squeeze out yet more improvement.
3038 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3039 flag allowing group syntax was set by the header_syntax check but not
3040 turned off, possible causing trouble later; (2) The flag was not being
3041 set at all for the header_verify test, causing "group"-style headers to
3042 be rejected. I have now set it in this case, and also caused header_
3043 verify to ignore an empty address taken from a group. While doing this, I
3044 came across some other cases where the code for allowing group syntax
3045 while scanning a header line wasn't quite right (mostly, not resetting
3046 the flag correctly in the right place). These bugs could have caused
3047 trouble for malformed header lines. I hope it is now all correct.
3049 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3050 with the "reply" argument non-NULL. The code, however (which originally
3051 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3052 but it didn't always do it. This confused somebody who was copying the
3053 code for some other use. I have removed all the tests.
3055 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3056 feature that was used to support insecure browsers during the U.S. crypto
3057 embargo. It requires special client support, and Exim is probably the
3058 only MTA that supported it -- and would never use it because real RSA is
3059 always available. This code has been removed, because it had the bad
3060 effect of slowing Exim down by computing (never used) parameters for the
3061 RSA_EXPORT functionality.
3063 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3064 authenticator to fail if there's a tab character in the incoming data
3065 (there should never be unless someone is messing about, as it's supposed
3066 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3067 if the connection is using TLS or if the remote IP is the same as the
3068 local IP, and the "valid-client-cert option" if a client certificate has
3071 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3072 authenticators. This can be used for authorization after authentication
3073 succeeds. (In the case of plaintext, it servers for both authentication
3076 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3077 if any retry times were supplied.
3079 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3080 connection, where there is no client IP address to check. In this
3081 situation, the verify now always succeeds.
3083 PH/25 Applied John Jetmore's -Mset patch.
3085 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3087 PH/27 In a string expansion for a processed (not raw) header when multiple
3088 headers of the same name were present, leading whitespace was being
3089 removed from all of them, but trailing whitespace was being removed only
3090 from the last one. Now trailing whitespace is removed from each header
3091 before concatenation. Completely empty headers in a concatenation (as
3092 before) are ignored.
3094 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3095 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3097 PH/29 [Removed. This was a change that I later backed out, and forgot to
3098 correct the ChangeLog entry (that I had efficiently created) before
3099 committing the later change.]
3101 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3102 address errors (4xx response to RCPT) over the same connection as other
3103 messages routed to the same hosts. Such deliveries are always "forced",
3104 so retry times are not inspected. This resulted in far too many retries
3105 for the affected addresses. The effect occurred only when there were more
3106 hosts than the hosts_max_try setting in the smtp transport when it had
3107 the 4xx errors. Those hosts that it had tried were not added to the list
3108 of hosts for which the message was waiting, so if all were tried, there
3109 was no problem. Two fixes have been applied:
3111 (i) If there are any address or message errors in an SMTP delivery, none
3112 of the hosts (tried or untried) are now added to the list of hosts
3113 for which the message is waiting, so the message should not be a
3114 candidate for sending over the same connection that was used for a
3115 successful delivery of some other message. This seems entirely
3116 reasonable: after all the message is NOT "waiting for some host".
3117 This is so "obvious" that I'm not sure why it wasn't done
3118 previously. Hope I haven't missed anything, but it can't do any
3119 harm, as the worst effect is to miss an optimization.
3121 (ii) If, despite (i), such a delivery is accidentally attempted, the
3122 routing retry time is respected, so at least it doesn't keep
3123 hammering the server.
3125 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3126 in ${readsocket because some servers need this prod.
3128 PH/32 Added some extra debug output when updating a wait-xxx database.
3130 PH/33 The hint "could be header name not terminated by colon", which has been
3131 given for certain expansion errors for a long time, was not being given
3132 for the ${if def:h_colon_omitted{... case.
3134 PH/34 The spec says: "With one important exception, whenever a domain list is
3135 being scanned, $domain contains the subject domain." There was at least
3136 one case where this was not true.
3138 PH/35 The error "getsockname() failed: connection reset by peer" was being
3139 written to the panic log as well as the main log, but it isn't really
3140 panic-worthy as it just means the connection died rather early on. I have
3141 removed the panic log writing for the ECONNRESET error when getsockname()
3144 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3145 runs only) independently of the message's sender address. This meant
3146 that, if the 4xx error was in fact related to the sender, a different
3147 message to the same recipient with a different sender could confuse
3148 things. In particular, this can happen when sending to a greylisting
3149 server, but other circumstances could also provoke similar problems.
3150 I have changed the default so that the retry time for these errors is now
3151 based a combination of the sender and recipient addresses. This change
3152 can be overridden by setting address_retry_include_sender=false in the
3155 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3156 remote server are returned as part of bounce messages. This was not
3157 happening for LMTP over a pipe (the lmtp transport), but now it is the
3158 same for both kinds of LMTP.
3160 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3161 in header lines that were in fact CNAMEs. This is no longer the case.
3163 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3164 and queue runs started by the daemon processed all messages. This has
3165 been fixed so that -R and -S can now usefully be given with -q<time>.
3167 PH/40 Import PCRE release 6.7 (fixes some bugs).
3169 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3171 PH/42 Give an error if -q is specified more than once.
3173 PH/43 Renamed the variables $interface_address and $interface_port as
3174 $received_ip_address and $received_port, to make it clear that these
3175 values apply to message reception, and not to the outgoing interface when
3176 a message is delivered. (The old names remain recognized, of course.)
3178 PH/44 There was no timeout on the connect() call when using a Unix domain
3179 socket in the ${readsocket expansion. There now is.
3181 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3182 be meaningful with "accept".
3184 SC/01 Eximstats V1.43
3185 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3187 SC/02 Eximstats V1.44
3188 Use a glob alias rather than an array ref in the generated
3189 parser. This improves both readability and performance.
3191 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3192 Collect SpamAssassin and rejection statistics.
3193 Don't display local sender or destination tables unless
3194 there is data to show.
3195 Added average volumes into the top table text output.
3197 SC/04 Eximstats V1.46
3198 Collect data on the number of addresses (recipients)
3199 as well as the number of messages.
3201 SC/05 Eximstats V1.47
3202 Added 'Message too big' to the list of mail rejection
3203 reasons (thanks to Marco Gaiarin).
3205 SC/06 Eximstats V1.48
3206 Mainlog lines which have GMT offsets and are too short to
3207 have a flag are now skipped.
3209 SC/07 Eximstats V1.49 (Alain Williams)
3210 Added the -emptyok flag.
3212 SC/08 Eximstats V1.50
3213 Fixes for obtaining the IP address from reject messages.
3215 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3216 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3217 whitespace changes from 4.64-PH/27
3219 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3222 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3223 are found, allow negative numbers in numeric criteria)
3225 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3227 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3228 to match changes made in 4.64-PH/43
3230 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3232 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3233 "domain" is actually an IP address, and force a failure. This locks out
3234 those revolvers/nameservers that support "A-for-A" lookups, in
3235 contravention of the specifications.
3237 PH/48 When a host name was looked up from an IP address, and the subsequent
3238 forward lookup of the name timed out, the host name was left in
3239 $sender_host_name, contrary to the specification.
3241 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3242 restricted to single-key lookups, Exim was not diagnosing an error if
3243 * or *@ was used with a query-style lookup.
3245 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3247 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3248 long ago, but noone interested enough thought of it. Let's just say that
3249 the "1.1" means that there are some new functions that weren't there at
3250 some point in the past.
3252 PH/51 Error processing for expansion failure of helo_data from an smtp
3253 transport during callout processing was broken.
3255 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3256 tested/used via the -bh/-bhc/-bs options.
3258 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3259 bug, fixed in subsequent PCRE releases).
3261 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3262 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3264 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3270 SC/01 Use a glob alias rather than an array ref in eximstats generated
3271 parser. This improves both readability and performance.
3273 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3274 Don't display local sender or destination tables in eximstats unless
3275 there is data to show.
3276 Added average volumes into the eximstats top table text output.
3278 SC/03 Collect data on the number of addresses (recipients) as well
3279 as the number of messages in eximstats.
3281 TF/01 Correct an error in the documentation for the redirect router. Exim
3282 does (usually) call initgroups() when daemonizing.
3284 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3285 with consistent privilege compared to when running as a daemon.
3287 TF/03 Note in the spec that $authenticated_id is not set for local
3288 submissions from trusted users.
3290 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3291 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3293 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3294 by adding some example configuration directives to the default
3295 configuration file. A little bit of work is required to uncomment the
3296 directives and define how usernames and passwords are checked, but
3297 there is now a framework to start from.
3299 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3300 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3301 without this. I don't know how relevant this is to other LDAP libraries.
3303 PH/02 Add the verb name to the "unknown ACL verb" error.
3305 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3307 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3309 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3310 directory not expanded when it should be if an expanded home directory
3311 was set for the address (which is overridden by the transport).
3313 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3316 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3317 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3318 because it is too late at that time, and has no effect.
3320 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3321 security issue with \' (bugzilla #107). I could not use the
3322 PQescapeStringConn() function, because it needs a PGconn value as one of
3325 PH/08 When testing addresses using -bt, indicate those final addresses that
3326 are duplicates that would not cause an additional delivery. At least one
3327 person was confused, thinking that -bt output corresponded to deliveries.
3328 (Suppressing duplicates isn't a good idea as you lose the information
3329 about possibly different redirections that led to the duplicates.)
3331 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3332 systems where poll() doesn't work, in particular OS X.
3334 PH/10 Added more information to debugging output for retry time not reached.
3336 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3337 operations in malware.c.
3339 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3342 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3343 syslog_duplication set false, log lines that would normally be written
3344 both the the main log and to the reject log were not written to syslog at
3347 PH/14 In the default configuration, change the use of "message" in ACL warn
3348 statements to "add_header".
3350 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3351 not followed by a command (e.g. "seen endif").
3353 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3354 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3357 PH/17 Added extra conditions to the default value of delay_warning_condition
3361 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3362 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3363 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3366 The Auto-Submitted: and various List- headers are standardised, whereas I
3367 don't think Precedence: ever was.
3369 PH/18 Refactored debugging code in route_finduser() to show more information,
3370 in particular, the error code if getpwnam() issues one.
3372 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3373 This is apparently needed in addition to the PH/07 change above to avoid
3374 any possible encoding problems.
3376 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3377 but not after initializing Perl.
3379 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3380 output them only if debugging. By default they are written stderr,
3381 apparently, which is not desirable.
3383 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3386 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3389 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3391 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3392 authenticated or an ident call has been made. Suppress the default
3393 values for $authenticated_id and $authenticated_sender (but permit -oMai
3394 and -oMas) when testing with -bh.
3396 PH/24 Re-jigged the order of the tests in the default configuration so that the
3397 tests for valid domains and recipients precede the DNS black list and CSA
3398 tests, on the grounds that those ones are more expensive.
3400 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3401 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3402 This bug exists in every version of Exim that I still have, right back to
3405 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3406 However, an attempt to turn on case-sensitivity in a regex key by
3407 including (?-i) didn't work because the subject string was already
3408 lowercased, and the effects were non-intuitive. It turns out that a
3409 one-line patch can be used to allow (?-i) to work as expected.
3415 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3416 other effects) broke the use of negated acl sub-conditions.
3418 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3421 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3422 "Deny" causes Exim to reject the incoming connection with a 554 error.
3423 Unfortunately, if there is a major crisis, such as a disk failure,
3424 tcp-wrappers gives "deny", whereas what one would like would be some
3425 kind of temporary error. A kludge has been added to help with this.
3426 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3427 554 error is used if errno is still zero or contains ENOENT (which occurs
3428 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3431 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3433 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3434 errors. Otherwise a message that provokes a temporary error (when other
3435 messages do not) can cause a whole host to time out.
3437 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3438 addresses were routed directly to files or pipes from a redirect router.
3439 File deliveries just didn't batch; pipe deliveries might have suffered
3442 PH/06 A failure to get a lock for a hints database would erroneously always say
3443 "Failed to get write lock", even when it was really a read lock.
3445 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3446 of 0600. This has been changed to use the value of the lockfile_mode
3447 option (which defaults to 0600).
3449 PH/08 Applied small patch from the Sieve maintainer.
3451 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3452 folder from quota calculations, a direct delivery into this folder messed
3453 up the contents of the maildirsize file. This was because the regex was
3454 used only to exclude .Trash (or whatever) when the size of the mailbox
3455 was calculated. There was no check that a delivery was happening into an
3456 excluded directory. This bug has been fixed by ignoring all quota
3457 processing for deliveries into excluded directories.
3459 PH/10 Added the maildirfolder_create_regex option to appendfile.
3465 PH/01 The code for finding all the local interface addresses on a FreeBSD
3466 system running IPv6 was broken. This may well have applied to all BSD
3467 systems, as well as to others that have similar system calls. The broken
3468 code found IPv4 interfaces correctly, but gave incorrect values for the
3469 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3470 that it would not match correctly against @[] and not recognize the IPv6
3473 PH/02 The ipliteral router was not recognizing addresses of the form user@
3474 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3476 PH/03 Added disable_ipv6.
3478 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3479 decoded form, because it is most often used to construct To: headers
3480 lines in autoreplies, and the decoded form may well be syntactically
3481 invalid. However, $reply_address has leading white space removed, and all
3482 newlines turned into spaces so that the autoreply transport does not
3485 PH/05 If group was specified without a user on a router, and no group or user
3486 was specified on a transport, the group from the router was ignored.
3488 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3489 for visible compile-time settings that can be used to change these
3490 numbers, for those that want even more. Backwards compatibility with old
3491 spool files has been maintained. However, going back to a previous Exim
3492 release will lost any variables that are in spool files.
3494 PH/07 Two small changes when running in the test harness: increase delay when
3495 passing a TCP/IP connection to a new process, in case the original
3496 process has to generate a bounce, and remove special handling of
3497 127.0.0.2 (sic), which is no longer necessary.
3499 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3500 be the same on different OS.
3502 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3505 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3506 whether --show-vars was specified or not
3508 JJ/02 exipick: Added support for new ACL variable spool format introduced
3511 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3512 syntactically invalid From: or Reply-to: line, and a filter used this to
3513 generate an autoreply, and therefore failed to obtain an address for the
3514 autoreply, Exim could try to deliver to a non-existent relative file
3515 name, causing unrelated and misleading errors. What now happens is that
3516 it logs this as a hard delivery error, but does not attempt to create a
3519 PH/11 The exinext utility has a -C option for testing purposes, but although
3520 the given file was scanned by exinext itself; it wasn't being passed on
3521 when Exim was called.
3523 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3524 an end-of-file indication when reading a command response.
3526 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3527 compiled. In many other places in Exim, IPv6 addresses are always
3528 recognized, so I have changed this. It also means that IPv4 domain
3529 literals of the form [IPV4:n.n.n.n] are now always recognized.
3531 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3532 used if the router is not running as root, for example, when verifying at
3533 ACL time, or when using -bh. The debugging output from this situation was
3534 non-existent - all you got was a failure to exec. I have made two
3537 (a) Failures to set uid/gid, the current directory, or a process leader
3538 in a subprocess such as that created by queryprogram now generate
3539 suitable debugging output when -d is set.
3541 (b) The queryprogram router detects when it is not running as root,
3542 outputs suitable debugging information if -d is set, and then runs
3543 the subprocess without attempting to change uid/gid.
3545 PH/15 Minor change to Makefile for building test_host (undocumented testing
3548 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3549 additional section of a DNS packet that returns MX or SRV records.
3550 Instead, it always explicitly searches for A/AAAA records. This avoids
3551 major problems that occur when a DNS server includes only records of one
3552 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3553 fixed another bug: if SRV records were looked up and the corresponding
3554 address records were *not* found in the additional section, the port
3555 values from the SRV records were lost.
3557 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3558 using the correct key (the original address) when searching the retry
3559 rules in order to find which one to use for generating the retry hint.
3561 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3562 adding the default one. Similarly, if it contains a Reply-To: header, the
3563 errors_reply_to option, if set, is not used.
3565 PH/19 When calculating a retry time, Exim used to measure the "time since
3566 failure" by looking at the "first failed" field in the retry record. Now
3567 it does not use this if it is later than than the arrival time of the
3568 message. Instead it uses the arrival time. This makes for better
3569 behaviour in cases where some deliveries succeed, thus re-setting the
3570 "first failed" field. An example is a quota failure for a huge message
3571 when small messages continue to be delivered. Without this change, the
3572 "time since failure" will always be short, possible causing more frequent
3573 delivery attempts for the huge message than are intended.
3574 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3576 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3577 $1, $2, $3) because the numerical variables can be reset during some
3578 expansion items (e.g. "match"), thereby losing the authentication data.
3580 PH/21 Make -bV show the size of off_t variables so that the test suite can
3581 decide whether to run tests for quotas > 2G.
3583 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3584 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3585 filecount value is greater than 2G or if a quota value is greater than 2G
3586 on a system where the size of off_t is not greater than 4, a panic error
3589 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3590 never match. The debug and -bh output now contains an explicit error
3591 message indicating a malformed IPv4 address or mask.
3593 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3594 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3595 PH/23 above applies.
3597 PH/25 Do not write to syslog when running in the test harness. The only
3598 occasion when this arises is a failure to open the main or panic logs
3599 (for which there is an explicit test).
3601 PH/26 Added the /no_tell option to "control=freeze".
3603 PH/27 If a host name lookup failed very early in a connection, for example, if
3604 the IP address matched host_lookup and the reverse lookup yielded a name
3605 that did not have a forward lookup, an error message of the form "no IP
3606 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3607 could be logged. Now it outputs the IP address instead of "NULL".
3609 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3610 allows the sender and the authenticated sender to be set when
3611 submitting a message from within Exim. Since child_open_exim() is
3612 documented for local_scan(), the new function should be too.
3614 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3615 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3616 results in an empty string is now treated as unset.
3618 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3620 PH/31 Added sender_verify_fail logging option.
3622 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3623 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3624 tidied the source and removed it altogether.
3626 PH/33 When a queue run was abandoned because the load average was too high, a
3627 log line was always written; now it is written only if the queue_run log
3628 selector is set. In addition, the log line for abandonment now contains
3629 information about the queue run such as the pid. This is always present
3630 in "start" and "stop" lines but was omitted from the "abandon" line.
3632 PH/34 Omit spaces between a header name and the colon in the error message that
3633 is given when verify = headers_syntax fails (if there are lots of them,
3634 the message gets confusing).
3636 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3637 names, as there are now some PTR records that contain slashes. This check
3638 is only to protect against broken name servers that fall over on strange
3639 characters, so the fact that it applies to all lookups doesn't matter.
3641 PH/36 Now that the new test suite is complete, we can remove some of the
3642 special code in Exim that was needed for the old test suite. For example,
3643 sorting DNS records because real resolvers return them in an arbitrary
3644 order. The new test suite's fake resolver always returns records in the
3647 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3648 bounces) except when queue_only is set, to avoid logging races between
3649 the different processes.
3651 PH/38 Panic-die if .include specifies a non-absolute path.
3653 PH/39 A tweak to the "H" retry rule from its user.
3655 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3656 a label. They prevented compilation on older perls.
3658 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3659 a warning to be raised on newish perls.
3661 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3662 on queue. Changes to match documented behaviour of showing count of
3663 messages matching specified criteria.
3665 PH/40 Changed the default ident timeout from 30s to 5s.
3667 PH/41 Added support for the use of login_cap features, on those BSD systems
3668 that have them, for controlling the resources used by pipe deliveries.
3670 PH/42 The content-scanning code uses fopen() to create files in which to put
3671 message data. Previously it was not paying any attention to the mode of
3672 the files. Exim runs with umask(0) because the rest of the code creates
3673 files with open(), and sets the required mode explicitly. Thus, these
3674 files were ending up world-writeable. This was not a big issue, because,
3675 being within the spool directory, they were not world-accessible. I have
3676 created a function called modefopen, which takes an additional mode
3677 argument. It sets umask(777), creates the file, chmods it to the required
3678 mode, then resets the umask. All the relevant calls to fopen() in the
3679 content scanning code have been changed to use this function.
3681 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3682 to 24 hours. This avoids potential overflow problems when processing G
3683 and H retry rules. I suspect nobody ever tinkers with this value.
3685 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3687 PH/45 When the plaintext authenticator is running as a client, the server's
3688 challenges are checked to ensure they are valid base64 strings. By
3689 default, the authentication attempt is cancelled if an invalid string is
3690 received. Setting client_ignore_invalid_base64 true ignores these errors.
3691 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3692 they are received. Thus, the responses can be made to depend on the
3693 challenges. If an invalid string is ignored, an empty string is placed in
3696 PH/46 Messages that are created by the autoreply transport now contains a
3697 References: header, in accordance with RFCs 2822 and 3834.
3699 PH/47 Added authenticated_sender_force to the smtp transport.
3701 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3703 PH/49 Installed latest patch from the Sieve maintainer.
3705 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3706 was also set, the appendfile transport was unnecessarily scanning a
3707 directory of message files (e.g. for maildir delivery) to find the count
3708 of files (along with the size), even though it did not need this
3709 information. It now does the scan only if it needs to find either the
3710 size of the count of files.
3712 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3714 PH/52 Two bugs concerned with error handling when the smtp transport is
3717 (i) Exim was not creating retry information for temporary errors given
3718 for individual recipients after the DATA command when the smtp transport
3719 was used in LMTP mode. This meant that they could be retried too
3720 frequently, and not timed out correctly.
3722 (ii) Exim was setting the flag that allows error details to be returned
3723 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3724 recipients that were returned after the DATA command.
3726 PH/53 This is related to PH/52, but is more general: for any failing address,
3727 when detailed error information was permitted to be returned to the
3728 sender, but the error was temporary, then after the final timeout, only
3729 "retry timeout exceeded" was returned. Now it returns the full error as
3730 well as "retry timeout exceeded".
3732 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3733 do this, and (what is worse) MTAs that accept it.
3735 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3736 will now be deprecated.
3738 PH/56 New os.c-cygwin from the Cygwin maintainer.
3740 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3741 formats (previously only available in exim formats via -bpr, -bpru,
3742 and -bpra. Now also available in native and exiqgrep formats)
3744 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3745 with very large, slow to parse queues
3747 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3749 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3751 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3752 responses to authentication challenges, though it was showing the
3753 challenges; (ii) I've removed the CR characters from the debug output for
3756 PH/58 Allow for the insertion of a newline as well as a space when a string
3757 is turned into more than one encoded-word during RFC 2047 encoding. The
3758 Sieve code now uses this.
3760 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3761 data_4xx, lost_connection, tls_required.
3763 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3764 message was being sent as an SMTP response.
3766 PH/61 Add -l and -k options to exicyclog.
3768 PH/62 When verifying, if an address was redirected to one new address, so that
3769 verification continued, and the new address failed or deferred after
3770 having set something in $address_data, the value of $address_data was not
3771 passed back to the ACL. This was different to the case when no
3772 redirection occurred. The value is now passed back in both cases.
3774 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3775 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3776 use login_cap.h, so on its own it isn't the distinguishing feature. The
3777 new name refers directly to the setclassresources() function.
3779 PH/65 Added configuration files for NetBSD3.
3781 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3783 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3784 is preferred over IPv4.
3786 PH/68 The bounce_return_message and bounce_return_body options were not being
3787 honoured for bounces generated during the reception of non-SMTP messages.
3788 In particular, this applied to messages rejected by the ACL. This bug has
3789 been fixed. However, if bounce_return_message is true and bounce_return_
3790 body is false, the headers that are returned for a non-SMTP message
3791 include only those that have been read before the error was detected.
3792 (In the case of an ACL rejection, they have all been read.)
3794 PH/69 The HTML version of the specification is now built in a directory called
3795 spec_html instead of spec.html, because the latter looks like a path with
3796 a MIME-type, and this confuses some software.
3798 PH/70 Catch two compiler warnings in sieve.c.
3800 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3801 function verify_get_ident() calls ip_connect() to connect a socket, but
3802 if the "connect()" function timed out, ip_connect() used to close the
3803 socket. However, verify_get_ident() also closes the socket later, and in
3804 between Exim writes to the log, which may get opened at this point. When
3805 the socket was closed in ip_connect(), the log could get the same file
3806 descriptor number as the socket. This naturally causes chaos. The fix is
3807 not to close the socket in ip_connect(); the socket should be closed by
3808 the function that creates it. There was only one place in the code where
3809 this was missing, in the iplookup router, which I don't think anybody now
3810 uses, but I've fixed it anyway.
3812 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3813 well as to direct DNS lookups. Otherwise the handling of names in host
3814 lists is inconsistent and therefore confusing.
3820 PH/01 Two changes to the default runtime configuration:
3822 (1) Move the checks for relay_from_hosts and authenticated clients from
3823 after to before the (commented out) DNS black list checks.
3825 (2) Add control=submission to the relay_from_hosts and authenticated
3826 clients checks, on the grounds that messages accepted by these
3827 statements are most likely to be submissions.
3829 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3831 (1) Generate an error if the third argument for the ${prvs expansion is
3834 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3837 (3) Reset the variables that are obtained from the first argument of
3838 ${prvscheck and used in the second argument before leaving the code,
3839 because their memory is reclaimed, so using them afterwards may do
3842 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3843 one (it's much easier than Tom thought :-).
3845 (5) Because of (4), we can now allow for the use of $prvscheck_result
3846 inside the third argument.
3848 PH/03 For some reason, the default setting of PATH when running a command from
3849 a pipe transport was just "/usr/bin". I have changed it to
3852 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3853 anything to be listed in the output from -bV.
3855 PH/05 When a filter generated an autoreply, the entire To: header line was
3856 quoted in the delivery log line, like this:
3858 => >A.N.Other <ano@some.domain> <original@ddress> ...
3860 This has been changed so that it extracts the operative address. There
3861 may be more than one such address. If so, they are comma-separated, like
3864 => >ano@some.domain,ona@other.domain <original@ddress> ...
3866 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3867 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3868 not being looked up in the rDNS to get a host name, Exim was showing the
3869 IP address twice in Received: lines, even though the IP addresses were
3870 identical. For example:
3872 Received: from [1.2.3.4] (helo=[1.2.3.4])
3874 However, if the real host name was known, it was omitting the HELO data
3875 if it matched the actual IP address. This has been tidied up so that it
3876 doesn't show the same IP address twice.
3878 PH/07 When both +timestamp and +memory debugging was on, the value given by
3879 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3880 called by the debug printing, thereby overwriting the timestamp buffer.
3881 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3883 PH/08 When the original message was included in an autoreply transport, it
3884 always said "this is a copy of the message, including all the headers",
3885 even if body_only or headers_only was set. It now gives an appropriate
3888 PH/09 Applied a patch from the Sieve maintainer which:
3890 o fixes some comments
3891 o adds the (disabled) notify extension core
3892 o adds some debug output for the result of if/elsif tests
3893 o points to the current vacation draft in the documentation
3894 and documents the missing references header update
3898 o fixes a bug in processing the envelope test (when testing
3899 multiple envelope elements, the last element determined the
3902 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3903 Electronic Mail") by including:
3905 Auto-submitted: auto-generated
3907 in the messages that it generates (bounce messages and others, such as
3908 warnings). In the case of bounce messages for non-SMTP messages, there was
3909 also a typo: it was using "Auto_submitted" (underscore instead of
3910 hyphen). Since every message generated by Exim is necessarily in response
3911 to another message, thes have all been changed to:
3913 Auto-Submitted: auto-replied
3915 in accordance with these statements in the RFC:
3917 The auto-replied keyword:
3919 - SHOULD be used on messages sent in direct response to another
3920 message by an automatic process,
3922 - MUST NOT be used on manually-generated messages,
3924 - MAY be used on Delivery Status Notifications (DSNs) and Message
3925 Disposition Notifications (MDNs),
3927 - MUST NOT be used on messages generated by automatic or periodic
3928 processes, except for messages which are automatic responses to
3931 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3932 to the default Received: header definition.
3934 PH/12 Added log selector acl_warn_skipped (default on).
3936 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3937 variables because (a) they are in the wrong storage pool and (b) even if
3938 they were copied, it wouldn't work properly because of the caching.
3940 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3941 checking when decoding. Apparently there are clients that generate
3942 overlong encoded strings. Why am I not surprised?
3944 PH/15 If the first argument of "${if match_address" was not empty, but did not
3945 contain an "@" character, Exim crashed. Now it writes a panic log message
3946 and treats the condition as false.
3948 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3950 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3951 extension "envelope-auth". The code is finished and in agreement with
3952 other implementations, but there is no documentation so far and in fact,
3953 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3954 not changing the active code.
3956 Print executed "if" and "elsif" statements when debugging is used. This
3957 helps a great deal to understand what a filter does.
3959 Document more things not specified clearly in RFC3028. I had all this
3960 sorted out, when out of a sudden new issues came to my mind. Oops."
3962 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3965 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3966 canonical form (as documented). However, after a host name lookup from
3967 the IP address, check_host() was doing a simple string comparison with
3968 addresses acquired from the DNS when checking that the found name did
3969 have the original IP as one of its addresses. Since any found IPv6
3970 addresses are likely to be in abbreviated form, the comparison could
3971 fail. Luckily, there already exists a function for doing the comparison
3972 by converting both addresses to binary, so now that is used instead of
3973 the text comparison.
3975 PH/20 There was another similar case to PH/19, when a complete host name was
3976 given in a host list; looking up its IP address could give an abbreviated
3977 form, whereas the current host's name might or might not be abbreviated.
3978 The same fix has been applied.
3984 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3985 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3988 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3989 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3991 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3993 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3994 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3995 Also, for "Auto-Submitted", treat anything other than "no" as
3996 non-personal, in accordance with RFC 3834. (Previously it treated
3997 anything starting "auto-" as non-personal.)
3999 TF/01 The control=submission/name=... option had a problem with syntax
4000 errors if the name included a slash character. The /name= option
4001 now slurps the rest of the string, so it can include any characters
4002 but it must come last in the list of options (after /sender_retain
4005 PH/05 Some modifications to the interface to the fake nameserver for the new
4013 TK/01 Added the "success_on_redirect" address verification option. See
4014 NewStuff for rationale and an example.
4016 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4018 PH/02 Patch to exigrep to allow it to work on syslog lines.
4020 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4021 fread() to skip over the body file's header line, because in Cygwin the
4022 header line is locked and is inaccessible.
4024 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4025 co-exist for some time) to make it clear that it is the Exim ID that is
4026 referenced, not the Message-ID: header line.
4028 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4029 string_format() function, because snprintf() does not exist on all
4032 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4033 ${stat: expansion item.
4035 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4036 protocol synchronization error", to keep the pedants happy.
4038 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4039 well as for IRIX systems, when gcc is being used. See the host.c source
4042 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4044 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4047 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4048 transport and to the smtp transport in LMTP mode.
4050 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4052 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4053 run a filter in a subprocess. This could lead to confusion in subsequent
4054 lookups in the parent process. There should also be a search_tidyup() at
4055 the end of the subprocess.
4057 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4058 only if the host matched helo_try_verify_hosts, which caused the
4059 verification to occur when the EHLO/HELO command was issued. The ACL just
4060 tested the remembered result. Now, if a previous verification attempt has
4061 not happened, "verify = helo" does it there and then.
4063 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4065 TK/03 Fix log output including CR from clamd.
4067 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4068 exist provoked a memory error which could cause a segfault.
4070 PH/15 Installed PCRE 6.2
4072 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4074 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4075 of the problem. Specifically, suggested +O2 rather than +O1 for the
4078 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4080 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4081 record, the port was not correctly logged when the outgoing_port log
4082 selector was set (it logged the transort's default port).
4084 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4085 fallback_hosts, and "hosts" in the smtp transport.
4087 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4088 host errors such as "Connection refused".
4090 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4091 authentication with radiusclient 0.4.9:
4093 - Error returned from rc_read_config was caught wrongly
4094 - Username/password not passed on to radius server due to wrong length.
4096 The presumption is that some radiusclient API changes for 4.51/PH/17
4097 were not taken care of correctly. The code is still untested by me (my
4098 Linux distribution still has 0.3.2 of radiusclient), but it was
4099 contributed by a Radius user.
4101 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4102 expanding the "port" option of the smtp transport.
4104 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4105 while reading a MIME header. Thanks to Tom Hughes for a patch.
4107 PH/24 Include config.h inside local_scan.h so that configuration settings are
4110 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4111 that in an ACL for RCPT (for example), you can examine exactly what was
4114 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4115 commands, but it was not correctly comparing the address with the actual
4116 client host address. Thus, it would show the EHLO address in Received:
4117 header lines when this was not necessary.
4119 PH/27 Added the % operator to ${eval:}.
4121 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4122 it should be ignoring failures (because with -C, for example, it has lost
4123 privilege). It wasn't ignoring creation failures other than "already
4126 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4129 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4130 because an input line was too long, either on its own, or by virtue of
4131 too many continuations, the temporary file was not being removed, and the
4132 return code was incorrect.
4134 PH/31 Missing "BOOL" in function definition in filtertest.c.
4136 PH/32 Applied Sieve patches from the maintainer.
4138 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4140 PH/33 Added "verify = not_blind".
4142 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4143 Local/Makefile (with some defaults set). These are used in built scripts
4144 such as exicyclog, but they have never been used in the exim_install
4145 script (though there are many overriding facilities there). I have
4146 arranged that the exim_install script now takes note of these two
4149 PH/35 Installed configuration files for Dragonfly.
4151 PH/36 When a locally submitted message by a trusted user did not contain a
4152 From: header, and the sender address was obtained from -f or from an SMTP
4153 MAIL command, and the trusted user did not use -F to supply a sender
4154 name, $originator_name was incorrectly used when constructing a From:
4155 header. Furthermore, $originator_name was used for submission mode
4156 messages from external hosts without From: headers in a similar way,
4157 which is clearly wrong.
4159 PH/37 Added control=suppress_local_fixups.
4161 PH/38 When log_selector = +received_sender was set, and the addition of the
4162 sender made the log line's construction buffer exactly full, or one byte
4163 less than full, an overflow happened when the terminating "\n" was
4166 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4167 when the result of a list match is failure because a DNS lookup failed.
4169 PH/40 RM_COMMAND is now used in the building process.
4171 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4172 the "build-* directories that it finds.
4174 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4175 address in a domain literal was a prefix of an interface address.
4177 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4178 when verifying a sender address, unless rewrite_headers is false.
4180 PH/44 Wrote a long comment about why errors_to addresses are verified as
4181 recipients, not senders.
4183 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4184 the ratelimit ACL was added.
4186 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4188 PH/46 Added extra information about PostgreSQL errors to the error string.
4190 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4191 avoiding the need to install special zones in a real server. This is
4192 backwards compatible; if it can't find the fake resolver, it drops back.
4193 Thus, both old and new test suites can be run.
4195 TF/02 Added util/ratelimit.pl
4197 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4198 clock is set back in time.
4200 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4201 Candler <B.Candler@pobox.com>.
4203 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4204 OK for addresses that are the result of redirections.
4206 PH/48 A number of further additions for the benefit of the new test suite,
4207 including a fake gethostbyname() that interfaces to the fake DNS resolver
4210 TF/06 The fix for widen_domains has also been applied to qualify_single and
4211 search_parents which are the other dnslookup options that can cause
4214 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4217 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4219 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4220 service" if it encountered an MX record with an empty target hostname.
4221 The message is now "an MX or SRV record indicated no SMTP service".
4223 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4224 if the DNS of the sending site is misconfigured. This is quite a
4225 common situation. This change restores the behaviour of treating a
4226 helo verification defer as a failure.
4228 PH/51 If self=fail was set on a router, the bounce message did not include the
4229 actual error message.
4235 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4237 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4238 command itself ended in error, the underlying message about the transport
4239 filter timeout was being overwritten with the pipe command error. Now the
4240 underlying error message should be appended to the second error message.
4242 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4244 PH/02 Reduce the amount of output that "make" produces by default. Full output
4245 can still be requested.
4247 PH/03 The warning log line about a condition test deferring for a "warn" verb
4248 was being output only once per connection, rather than after each
4249 occurrence (because it was using the same function as for successful
4250 "warn" verbs). This seems wrong, so I have changed it.
4252 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4253 it should not have, which might have caused a crash in the right
4254 circumstances, but probably never did.
4256 PH/04 Installed a modified version of Tony Finch's patch to make submission
4257 mode fix the return path as well as the Sender: header line, and to
4258 add a /name= option so that you can make the user's friendly name appear
4261 TF/03 Added the control = fakedefer ACL modifier.
4263 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4264 Mark Lowes for thorough testing.
4266 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4268 TK/03 Merged latest SRS patch from Miles Wilton.
4270 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4271 with the definition in sysexits.h (which is #included earlier).
4272 Fortunately, Exim does not actually use EX_OK. The code used to try to
4273 preserve the sysexits.h value, by assuming that macro definitions were
4274 scanned for macro replacements. I have been disabused of this notion,
4275 so now the code just undefines EX_OK before #including unistd.h.
4277 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4278 in the smtp transport. When a block could not be written in a single
4279 write() function, the timeout was being re-applied to each part-write.
4280 This seems wrong - if the receiver was accepting one byte at a time it
4281 would take for ever. The timeout is now adjusted when this happens. It
4282 doesn't have to be particularly precise.
4284 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4285 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4287 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4288 without a domain if the check to <postmaster@domain> fails.
4290 SC/01 Eximstats: added -xls and the ability to specify output files
4291 (patch written by Frank Heydlauf).
4293 SC/02 Eximstats: use FileHandles for outputting results.
4295 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4297 SC/04 Eximstats: fixed display of large numbers with -nvr option
4299 SC/05 Eximstats: fixed merging of reports with empty tables.
4301 SC/06 Eximstats: added the -include_original_destination flag
4303 SC/07 Eximstats: removed tabs and trailing whitespace.
4305 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4307 TK/06 MBOX spool code: Add real "From " MBOX separator line
4308 so the .eml file is really in mbox format (even though
4309 most programs do not really care). Patch from Alex Miller.
4311 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4312 The latter is generated from $received_to and is only set if the
4313 message has one envelope recipient. SA can use these headers,
4314 obviously out-of-the-box. Patch from Alex Miller.
4316 PH/08 The ${def test on a variable was returning false if the variable's
4317 value was "0", contrary to what the specification has always said!
4318 The result should be true unless the variable is empty.
4320 PH/09 The syntax error of a character other than { following "${if
4321 def:variable_name" (after optional whitespace) was not being diagnosed.
4322 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4323 accidental colon was present, for example, could give incorrect results.
4325 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4326 result is used (not including appendfile, where other changes are about
4329 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4330 This involved changing a lot of size variables from int to off_t. It
4331 should work with maildirs and everything.
4333 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4334 spamd dying while we are connected to it.
4336 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4339 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4340 function for BDB 4.3.
4342 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4344 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4345 the sources for PCRE have been re-arranged and more files are now
4348 PH/15 The code I had for printing potentially long long variables in PH/11
4349 above was not the best (it lost precision). The length of off_t variables
4350 is now inspected at build time, and an appropriate printing format (%ld
4351 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4352 to be "long long int" or "long int". This is needed for the internal
4353 formatting function string_vformat().
4355 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4356 the configuration file to be ":syslog", then the script "guesses" where
4357 the logs files are, rather than using the compiled in default. In our
4358 case the guess is not the same as the compiled default, so the script
4359 suddenly stopped working when I started to use syslog. The patch checks
4360 to see if log_file_path is "". If so, it attempts to read it from exim
4361 with no configuration file to get the compiled in version, before it
4362 falls back to the previous guessing code."
4364 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4365 implementing BATV in an Exim configuration. See NewStuff for the gory
4368 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4369 Makefile that are specific to HP-UX.
4371 PH/18 If the "use_postmaster" option was set for a recipient callout together
4372 with the "random" option, the postmaster address was used as the MAIL
4373 FROM address for the random test, but not for the subsequent recipient
4374 test. It is now used for both.
4376 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4377 patch removes a few documentation additions to RFC 3028, because the
4378 latest draft now contains them. It adds the new en;ascii-case comparator
4379 and a new error check for 8bit text in MIME parts. Comparator and
4380 require names are now matched exactly. I enabled the subaddress
4381 extension, but it is not well tested yet (read: it works for me)."
4383 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4384 rework some of the code of TK/09 above to avoid the hardwired use of
4385 "%lld" and "long long". Replaced the call to snprintf() with a call to
4388 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4389 records point to non-existent hosts", "retry timeout exceeded", and
4390 "retry time not reached for any host after a long failure period".
4392 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4393 experimental DomainKeys support:
4395 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4396 (2) On an error such as an illegally used "control", the wrong name for
4397 the control was given.
4399 These problems did NOT occur unless DomainKeys support was compiled.
4401 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4403 PH/24 Added ${if match_ip condition.
4405 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4406 databases so that it will be absolutely obvious if a crash occurs in the
4407 DB library. This is a regular occurrence (often caused by mis-matched
4410 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4411 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4412 picked up on a user's system that detects such things. There doesn't seem
4413 to be a gcc warning option for this - only an attribute that has to be
4414 put on the function's prototype. It seems that in Fedora Core 4 they have
4415 set this on a number of new functions. No doubt there will be more in due
4418 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4419 specify a transport. However, if an address that was verified by such a
4420 router was the subject of a callout, Exim crashed because it tried to
4421 read the rcpt_include_affixes from the non-existent transport. Now it
4422 just assumes that the setting of that option is false. This bug was
4423 introduced by 4.51/PH/31.
4425 PH/28 Changed -d+all to exclude +memory, because that information is very
4426 rarely of interest, but it makes the output a lot bigger. People tend to
4427 do -d+all out of habit.
4429 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4430 code in os-type was giving problems when libc.so lives in lib64, like on
4433 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4434 aren't the modern standard, and it seems that some systems' include files
4435 don't always have them. Exim was already checking for some of the newer
4436 ones like T_AAAA, and defining it itself. I've added checks for all the
4437 record types that Exim uses.
4439 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4440 not automatically generating a new one, as it is supposed to. This
4441 prevented TLS from working. If the file did exist, but contained invalid
4442 data, a new version was generated, as expected. It was only the case of a
4443 non-existent file that was broken.
4445 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4446 with a change in libdomainkeys > 0.64.
4448 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4449 from DNS. If the selector record carries the flag, it now has
4450 precedence over the domain-wide flag.
4452 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4454 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4455 the use of a port name that isn't defined in /etc/services) occurred, the
4456 message was deferred as in a normal delivery, and thus remained on the
4457 spool, instead of being failed because of the mua_wrapper setting. This
4458 is now fixed, and I tidied up some of the mua_wrapper messages at the
4461 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4462 the messages in a hash of arrays rather than using individual hashes.
4463 This is a bit cleaner and results in dramatic memory savings, albeit
4464 at a slight CPU cost.
4466 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4467 as requested by Marc Sherman.
4469 SC/10 Eximstats: added histograms for user specified patterns as requested
4472 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4474 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4475 fopen() in the content-scanning modules that did not already have it.
4481 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4482 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4484 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4486 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4488 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4489 to test Sieve filters that use "vacation".
4491 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4492 that changes the way the GnuTLS parameters are stored in the cache file.
4493 The new format can be generated externally. For backward compatibility,
4494 if the data in the cache doesn't make sense, Exim assumes it has read an
4495 old-format file, and it generates new data and writes a new file. This
4496 means that you can't go back to an older release without removing the
4499 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4500 work if there are any delivery delays because "one_time" forces the
4501 parent to be marked "delivered", so its unseen clone is never tried
4502 again. For this reason, Exim now forbids the simultaneous setting of
4505 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4506 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4507 entry if you want to know the details. The fix, however, neglected to
4508 consider the case when local delivery batching is involved. The test for
4509 "previously delivered" was not happening when checking to see if an
4510 address could be batched with a previous (undelivered) one; under
4511 certain circumstances this could lead to multiple deliveries to the same
4514 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4515 in its include files, and this causes problems building Exim.
4517 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4518 header_syntax) but Exim was just ignoring anything given after a slash.
4519 In particular, this caused confusion with an attempt to use "verify =
4520 reverse_host_lookup/defer_ok". An error is now given when options are
4521 supplied for verify items that do not have them. (Maybe reverse_host_
4522 lookup should have a defer_ok option, but that's a different point.)
4524 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4525 defined by RFC 821) to 2048, because there were problems with some AUTH
4526 commands, and RFC 1869 says the size should be increased for extended
4527 SMTP commands that take arguments.
4529 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4532 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4533 "unknown" error; now it says that the functionality isn't in the binary.
4535 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4536 an address' error message when a string expansion fails (syntax or
4537 whatever). Otherwise the password may appear in the log. Following change
4538 PH/42 below, there is no longer a chance of it appearing in a bounce
4541 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4543 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4544 of its addresses was ever tried. (Bugzilla bug #2.)
4546 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4547 the result incorrectly in the debug output. (It correctly added a newline
4548 to what was transported.)
4550 TF/01 Added $received_time.
4552 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4553 commented out examples of how to interface to a virus scanner and to
4554 SpamAssassin. Also added commented examples of av_scanner and
4555 spamd_address settings.
4557 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4558 and controls are allowed in which ACLs. There were a couple of minor
4559 errors. Some of the entries in the conditions table (which is a table of
4560 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4561 negation of where the condition IS allowed.
4563 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4565 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4566 header file does not have a version number, so I've had to invent a new
4567 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4568 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4569 radiusclient), but it was contributed by a Radius user.
4571 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4572 files or directories, for OpenSSL.
4574 PH/19 When an Exim process that is running as root has to create an Exim log
4575 file, it does so in a subprocess that runs as exim:exim so as to get the
4576 ownership right at creation (otherwise, other Exim processes might see
4577 the file with the wrong ownership). There was no test for failure of this
4578 fork() call, which would lead to the process getting stuck as it waited
4579 for a non-existent subprocess. Forks do occasionally fail when resources
4580 run out. I reviewed all the other calls to fork(); they all seem to check
4583 PH/20 When checking for unexpected SMTP input at connect time (before writing
4584 the banner), Exim was not dealing correctly with a non-positive return
4585 from the read() function. If the client had disconnected by this time,
4586 the result was a log entry for a synchronization error with an empty
4587 string after "input=" when read() returned zero. If read() returned -1
4588 (an event I could not check), uninitialized data bytes were printed.
4589 There were reports of junk text (parts of files, etc) appearing after
4592 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4594 PH/22 Added support for macro redefinition, and (re)definition in between
4595 driver and ACL definitions.
4597 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4598 forgetting to use the resulting value; it was using the unexpanded value.
4600 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4601 hadn't been configured. The fix is from Juergen Kreileder, who
4602 understands it better than I do:
4604 "Here's what I see happening with three configured cyrus_sasl
4605 authenticators configured (plain, login, cram-md5):
4607 On startup auth_cyrus_sasl_init() gets called for each of these.
4608 This means three calls to sasl_listmech() without a specified mech_list.
4609 => SASL tests which mechs of all available mechs actually work
4610 => three warnings about OTP not working
4611 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4613 With the patch, sasl_listmech() also gets called three times. But now
4614 SASL's mech_list option is set to the server_mech specified in the the
4615 authenticator. Or in other words, the answer from sasl_listmech()
4616 gets limited to just the mech you're testing for (which is different
4618 => the return list contains just 'plain' or 'login', 'cram-md5' or
4619 nothing depending on the value of ob->server_mech.
4621 I've just tested the patch: Authentication still works fine,
4622 unavailable mechs specified in the exim configuration are still
4623 caught, and the auth.log warnings about OTP are gone."
4625 PH/25 When debugging is enabled, the contents of the command line are added
4626 to the debugging output, even when log_selector=+arguments is not
4629 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4630 answer is "GNU", and only if the return is "GNU/something" is the answer
4633 PH/27 $acl_verify_message is now set immediately after the failure of a
4634 verification in an ACL, and so is available in subsequent modifiers. In
4635 particular, the message can be preserved by coding like this:
4637 warn !verify = sender
4638 set acl_m0 = $acl_verify_message
4640 Previously, $acl_verify_message was set only while expanding "message"
4641 and "log_message" when a very denied access.
4643 PH/28 Modified OS/os.c-Linux with
4645 -#ifndef OS_LOAD_AVERAGE
4646 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4648 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4649 nomenclature these days.)
4651 PH/29 Installed patch from the Sieve maintainer that adds the options
4652 sieve_useraddress and sieve_subaddress to the redirect router.
4654 PH/30 In these circumstances:
4655 . Two addresses routed to the same list of hosts;
4656 . First host does not offer TLS;
4657 . First host accepts first address;
4658 . First host gives temporary error to second address;
4659 . Second host offers TLS and a TLS session is established;
4660 . Second host accepts second address.
4661 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4662 and peerdn, if requested) that were in fact used only for the second
4665 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4666 attention to any local part prefix or suffix that was matched by the
4667 router that accepted the address. It now behaves in the same way as it
4668 does for delivery: the affixes are removed from the local part unless
4669 rcpt_include_affixes is set on the transport.
4671 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4672 timeout during the DATA phase of an incoming message.
4674 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4675 applied a patch sanctioned by the Sieve maintainer.
4677 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4678 the uid or gid is negative. A case of a negative gid caused this to be
4679 noticed. The fix allows for either to be negative.
4681 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4682 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4685 PH/36 The change PH/12 above was broken. Fixed it.
4687 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4688 the grounds that routing the same address twice would always produce the
4689 same answer. This might have been true once, but it is certainly no
4690 longer true now. Routing a child address may depend on the previous
4691 routing that produced that child. Some complicated redirection strategies
4692 went wrong when messages had multiple recipients, and made Exim's
4693 behaviour dependent on the order in which the addresses were given.
4695 I have moved the duplicate checking until after the routing is complete.
4696 Exim scans the addresses that are assigned to local and remote
4697 transports, and removes any duplicates. This means that more work will be
4698 done, as duplicates will always all be routed, but duplicates are
4699 presumably rare, so I don't expect this is of any significance.
4701 For deliveries to pipes, files, and autoreplies, the duplicate checking
4702 still happens during the routing process, since they are not going to be
4705 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4706 It corrects a timeout issue with spamd. This is Ian's comment: "The
4707 background is that sometimes spamd either never reads data from a
4708 connection it has accepted, or it never writes response data. The exiscan
4709 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4710 blindly assumes that writes won't block so it may never time out."
4712 PH/39 Allow G after quota size as well as K and M.
4714 PH/40 The value set for $authenticated_id in an authenticator may not contain
4715 binary zeroes or newlines because the value is written to log lines and
4716 to spool files. There was no check on this. Now the value is run through
4717 the string_printing() function so that such characters are converted to
4718 printable escape sequences.
4720 PH/41 $message_linecount is a new variable that contains the total number of
4721 lines in the message. Compare $body_linecount, which is the count for the
4724 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4725 bounce and delay warning messages, except in certain special cases, which
4728 (a) An SMTP error message from a remote host;
4729 (b) A message specified in a :fail: redirection;
4730 (c) A message specified in a "fail" command in a system filter;
4731 (d) A message specified in a FAIL return from the queryprogram router;
4732 (e) A message specified by the cannot_route_message router option.
4734 In these cases only, Exim does include the error details in bounce and
4735 warning messages. There are also a few cases where bland messages such
4736 as "unrouteable address" or "local delivery error" are given.
4738 PH/43 $value is now also set for the "else" part of a ${run expansion.
4740 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4741 being worked on, but at least Exim now implements the latest version to
4744 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4745 process to complete was treated as a delivery failure, a timeout while
4746 writing the message to the pipe was logged, but erroneously treated as a
4747 successful delivery. Such timeouts include transport filter timeouts. For
4748 consistency with the overall process timeout, these timeouts are now
4749 treated as errors, giving rise to delivery failures by default. However,
4750 there is now a new Boolean option for the pipe transport called
4751 timeout_defer, which, if set TRUE, converts the failures into defers for
4752 both kinds of timeout. A transport filter timeout is now identified in
4755 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4756 systems where "make" and "gmake" are different, calling "gmake" at top
4757 level broke things. I've arranged for the value of $(MAKE) to be passed
4758 from the Makefile to this script so that it can call the same version of
4762 A note about Exim versions 4.44 and 4.50
4763 ----------------------------------------
4765 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4766 changes of various kinds. As a consequence, a big documentation update was
4767 needed. This delayed the release for rather longer than seemed good, especially
4768 in the light of a couple of (minor) security issues. Therefore, the changes
4769 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4770 release. So 4.44 and 4.50 are in effect two different branches that both start
4773 I have left the 4.50 change log unchanged; it contains all the changes since
4774 4.43. The change log for 4.44 is below; many of its items are identical to
4775 those for 4.50. This seems to be the most sensible way to preserve the
4776 historical information.
4782 1. Minor wording change to the doc/README.SIEVE file.
4784 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4785 computation of the current number of files was incorrect.
4787 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4788 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4791 4. Give more explanation in the error message when the command for a transport
4792 filter fails to execute.
4794 5. There are several places where Exim runs a non-Exim command in a
4795 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4796 was being done only for the command run by the queryprogram router. It is
4797 now done for all such subprocesses. The other cases are: ${run, transport
4798 filters, and the commands run by the lmtp and pipe transports.
4800 6. Added CONFIGURE_GROUP build-time option.
4802 7. Some older OS have a limit of 256 on the maximum number of file
4803 descriptors. Exim was using setrlimit() to set 1000 as a large value
4804 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4805 systems. I've change it so that if it can't get 1000, it tries for 256.
4807 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4808 was an oversight, and furthermore, ever since the addition of extra
4809 controls (e.g. 4.43/32), the checks on when to allow different forms of
4810 "control" were broken. There should now be diagnostics for all cases when a
4811 control that does not make sense is encountered.
4813 9. Added the /retain_sender option to "control=submission".
4815 10. $recipients is now available in the predata ACL (oversight).
4817 11. Tidy the search cache before the fork to do a delivery from a message
4818 received from the command line. Otherwise the child will trigger a lookup
4819 failure and thereby defer the delivery if it tries to use (for example) a
4820 cached ldap connection that the parent has called unbind on.
4822 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4823 of $address_data from the recipient verification was clobbered by the
4824 sender verification.
4826 13. The value of address_data from a sender verification is now available in
4827 $sender_address_data in subsequent conditions in the ACL statement.
4829 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4831 15. Added a new option "connect=<time>" to callout options, to set a different
4834 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4835 was its contents. (It was OK if the option was not defined at all.)
4837 17. A "Completed" log line is now written for messages that are removed from
4838 the spool by the -Mrm option.
4840 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4841 information about exactly what failed.
4843 19. Added -dd to debug only the daemon process.
4845 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4846 handles timeouts, both on the server side and network timeouts. Renamed the
4847 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4849 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4850 It is now set to "smtps".
4852 22. $host_address is now set to the target address during the checking of
4853 ignore_target_hosts.
4855 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4856 being passed; this would have caused $sender_host_name to have been used if
4857 matching the list had actually called for a host name (not very likely,
4858 since this list is usually IP addresses). A host name is now passed as
4861 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4862 code that specifies a non-restarting handler (typically sigaction() in
4863 modern systems) in an attempt to fix a rare and obscure crash bug.
4865 25. Narrowed the window for a race in the daemon that could cause it to ignore
4866 SIGCHLD signals. This is not a major problem, because they are used only to
4867 wake it up if nothing else does.
4869 26. A malformed maildirsize file could cause Exim to calculate negative values
4870 for the mailbox size or file count. Odd effects could occur as a result.
4871 The maildirsize information is now recalculated if the size or filecount
4874 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4875 support for a long time. Removed HAVE_SYS_VFS_H.
4877 28. Installed the latest version of exipick from John Jetmore.
4879 29. In an address list, if the pattern was not a regular expression, an empty
4880 subject address (from a bounce message) matched only if the pattern was an
4881 empty string. Non-empty patterns were not even tested. This was the wrong
4882 because it is perfectly reasonable to use an empty address as part of a
4883 database query. An empty address is now tested by patterns that are
4884 lookups. However, all the other forms of pattern expect the subject to
4885 contain a local part and a domain, and therefore, for them, an empty
4886 address still always fails if the pattern is not itself empty.
4888 30. Exim went into a mad DNS loop when attempting to do a callout where the
4889 host was specified on an smtp transport, and looking it up yielded more
4890 than one IP address.
4892 31. Re-factored the code for checking spool and log partition space into a
4893 function that finds that data and another that does the check. The former
4894 is then used to implement four new variables: $spool_space, $log_space,
4895 $spool_inodes, and $log_inodes.
4897 32. The RFC2047 encoding function was originally intended for short strings
4898 such as real names; it was not keeping to the 75-character limit for
4899 encoded words that the RFC imposes. It now respects the limit, and
4900 generates multiple encoded words if necessary. To be on the safe side, I
4901 have increased the buffer size for the ${rfc2047: expansion operator from
4904 33. It is now permitted to omit both strings after an "if" condition; if the
4905 condition is true, the result is "true". As before, when the second string
4906 is omitted, a false condition yields an empty string. This makes it less
4907 cumbersome to write custom ACL and router conditions.
4909 34. Failure to deliver a bounce message always caused it to be frozen, even if
4910 there was an errors_to setting on the router. The errors_to setting is now
4913 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4914 canonical form (fully expanded) before being placed in
4915 $sender_host_address.
4917 36. The table in the code that translates DNS record types into text (T_A to
4918 "A" for instance) was missing entries for NS and CNAME. It is just possible
4919 that this could have caused confusion if both these types were looked up
4920 for the same domain, because the text type is used as part of Exim's
4921 per-process caching. But the chance of anyone hitting this buglet seems
4924 37. The dnsdb lookup has been extended in a number of ways.
4926 (1) There is a new type, "zns", which walks up the domain tree until it
4927 finds some nameserver records. It should be used with care.
4929 (2) There is a new type, "mxh", which is like "mx" except that it returns
4930 just the host names, not the priorities.
4932 (3) It is now possible to give a list of domains (or IP addresses) to be
4933 looked up. The behaviour when one of the lookups defers can be
4934 controlled by a keyword.
4936 (4) It is now possible to specify the separator character for use when
4937 multiple records are returned.
4939 38. The dnslists ACL condition has been extended: it is now possible to supply
4940 a list of IP addresses and/or domains to be looked up in a particular DNS
4943 39. Added log_selector=+queue_time_overall.
4945 40. When running the queue in the test harness, wait just a tad after forking a
4946 delivery process, to get repeatability of debugging output.
4948 41. Include certificate and key file names in error message when GnuTLS fails
4949 to set them up, because the GnuTLS error message doesn't include the name
4950 of the failing file when there is a problem reading it.
4952 42. Allow both -bf and -bF in the same test run.
4954 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4956 44. The "Exiscan patch" is now merged into the mainline Exim source.
4958 45. Sometimes the final signoff response after QUIT could fail to get
4959 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4960 < 0 before doing a fflush(). This bug looks as though it goes back to the
4961 introduction of TLS in release 3.20, but "sometimes" must have been rare
4962 because the tests only now provoked it.
4964 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4965 (this can affect the format of dates).
4967 47. exim_tidydb, when checking for the continued existence of a message for
4968 which it has found a message-specific retry record, was not finding
4969 messages that were in split spool directories. Consequently, it was
4970 deleting retry records that should have stayed in existence.
4972 48. Steve fixed some bugs in eximstats.
4974 49. The SPA authentication driver was not abandoning authentication and moving
4975 on to the next authenticator when an expansion was forced to fail,
4976 contradicting the general specification for all authenticators. Instead it
4977 was generating a temporary error. It now behaves as specified.
4979 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4980 (the order specifies the preference for clients). The order is now AES256,
4981 AES128, 3DES, ARCFOUR128.
4983 51. Small patch to Sieve code - explicitly set From: when generating an
4986 52. Exim crashed if a remote delivery caused a very long error message to be
4987 recorded - for instance if somebody sent an entire SpamAssassin report back
4988 as a large number of 550 error lines. This bug was coincidentally fixed by
4989 increasing the size of one of Exim's internal buffers (big_buffer) that
4990 happened as part of the Exiscan merge. However, to be on the safe side, I
4991 have made the code more robust (and fixed the comments that describe what
4994 53. Now that there can be additional text after "Completed" in log lines (if
4995 the queue_time_overall log selector is set), a one-byte patch to exigrep
4996 was needed to allow it to recognize "Completed" as not the last thing in
4999 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5000 patch that reportedly fixes this has been added. I am not expert enough to
5001 create a test for it. This is what the patch creator wrote:
5003 "I found a little strange behaviour of ldap code when working with
5004 Windows 2003 AD Domain, where users was placed in more than one
5005 Organization Units. When I tried to give exim partial DN, the exit code
5006 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5007 But simultaneously result of request was absolutely normal ldap result,
5008 so I produce this patch..."
5010 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5011 REFERENCE, so I have modified the code to exclude the patch when that macro
5014 55. Some experimental protocols are using DNS PTR records for new purposes. The
5015 keys for these records are domain names, not reversed IP addresses. The
5016 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5017 leaves it alone. Component reversal etc. now happens only for IP addresses.
5020 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5022 57. Double the size of the debug message buffer (to 2048) so that more of very
5023 long debug lines gets shown.
5025 58. The exicyclog utility now does better if the number of log files to keep
5026 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5028 59. Two changes related to the smtp_active_hostname option:
5030 (1) $smtp_active_hostname is now available as a variable.
5031 (2) The default for smtp_banner uses $smtp_active_hostname instead
5032 of $primary_hostname.
5034 60. The host_aton() function is supposed to be passed a string that is known
5035 to be a valid IP address. However, in the case of IPv6 addresses, it was
5036 not checking this. This is a hostage to fortune. Exim now panics and dies
5037 if the condition is not met. A case was found where this could be provoked
5038 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5039 components; fortuitously, this particular loophole had already been fixed
5040 by change 4.50/55 above.
5042 If there are any other similar loopholes, the new check in host_aton()
5043 itself should stop them being exploited. The report I received stated that
5044 data on the command line could provoke the exploit when Exim was running as
5045 exim, but did not say which command line option was involved. All I could
5046 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5047 running as the user.
5050 61. There was a buffer overflow vulnerability in the SPA authentication code
5051 (which came originally from the Samba project). I have added a test to the
5052 spa_base64_to_bits() function which I hope fixes it.
5055 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5056 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5058 63. The daemon start-up calls getloadavg() while still root for those OS that
5059 need the first call to be done as root, but it missed one case: when
5060 deliver_queue_load_max is set with deliver_drop_privilege. This is
5061 necessary for the benefit of the queue runner, because there is no re-exec
5062 when deliver_drop_privilege is set.
5064 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5065 This has been fixed.
5067 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5068 was in use, was not putting the data itself into the right store pool;
5069 consequently, it could be overwritten for a subsequent message in the same
5070 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5073 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5075 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5076 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5077 the function were treating the return as a boolean value, which happened to
5078 work because 0=false and not-0=true, but is not correct code.
5080 68. The host_aton() function was not handling scoped IPv6 addresses (those
5081 with, for example, "%eth0" on the end) correctly.
5083 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5084 negated items (that is, ~something) in unsigned ints. Some compilers
5085 apparently mutter when there is no cast.
5087 70. If an address verification called from an ACL failed, and did not produce a
5088 user-specific message (i.e. there was only a "system" message), nothing was
5089 put in $acl_verify_message. In this situation, it now puts the system
5092 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5093 session; change 4.31/43 added the unwanted input to the log line - except
5094 that it did not do this in the start of session case. It now does.
5096 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5097 This is wrong and can cause the other end to generate a synchronization
5098 error if it is another Exim or anything else that does the synchronization
5099 check. A QUIT command is no longer sent after a timeout.
5101 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5102 during host lookups.
5104 74. The defer_ok option of callout verification was not working if it was used
5105 when verifying addresses in header lines, that is, for this case:
5107 verify = header_sender/callout=defer_ok
5109 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5110 those file descriptors could be used for SMTP connections. If anything
5111 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5112 could be sent to the SMTP client, causing chaos. The daemon now opens
5113 stdin, stdout, and stderr to /dev/null when it puts itself into the
5116 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5117 log by default. The user can override this with suitable Perl magic.
5119 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5120 the log message when discard triggers, was not working for the DATA ACL or
5121 for the non-SMTP ACL.
5123 78. Error message wording change in sieve.c.
5125 79. If smtp_accept_max_per_host was set, the number of connections could be
5126 restricted to fewer than expected, because the daemon was trying to set up
5127 a new connection before checking whether the processes handling previous
5128 connections had finished. The check for completed processes is now done
5129 earlier. On busy systems, this bug wouldn't be noticed because something
5130 else would have woken the daemon, and it would have reaped the completed
5133 80. If a message was submitted locally by a user whose login name contained one
5134 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5135 It caused a spool format error. I have fixed the spool reading code. A
5136 related problem was that the "from" clause in the Received: line became
5137 illegal because of the space(s). It is now covered by ${quote_local_part.
5139 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5142 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5144 83. Patch from Sieve maintainer to fix unterminated string problem in
5145 "vacation" handling.
5147 84. Some minor changes to the Linux configuration files to help with other
5148 OS variants using glibc.
5150 85. One more patch for Sieve to update vacation handling to latest spec.
5153 ----------------------------------------------------
5154 See the note above about the 4.44 and 4.50 releases.
5155 ----------------------------------------------------
5161 1. Change 4.43/35 introduced a bug that caused file counts to be
5162 incorrectly computed when quota_filecount was set in an appendfile
5165 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5166 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5169 3. Give more explanation in the error message when the command for a transport
5170 filter fails to execute.
5172 4. There are several places where Exim runs a non-Exim command in a
5173 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5174 was being done only for the command run by the queryprogram router. It is
5175 now done for all such subprocesses. The other cases are: ${run, transport
5176 filters, and the commands run by the lmtp and pipe transports.
5178 5. Some older OS have a limit of 256 on the maximum number of file
5179 descriptors. Exim was using setrlimit() to set 1000 as a large value
5180 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5181 systems. I've change it so that if it can't get 1000, it tries for 256.
5183 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5184 was an oversight, and furthermore, ever since the addition of extra
5185 controls (e.g. 4.43/32), the checks on when to allow different forms of
5186 "control" were broken. There should now be diagnostics for all cases when a
5187 control that does not make sense is encountered.
5189 7. $recipients is now available in the predata ACL (oversight).
5191 8. Tidy the search cache before the fork to do a delivery from a message
5192 received from the command line. Otherwise the child will trigger a lookup
5193 failure and thereby defer the delivery if it tries to use (for example) a
5194 cached ldap connection that the parent has called unbind on.
5196 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5197 of $address_data from the recipient verification was clobbered by the
5198 sender verification.
5200 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5201 was its contents. (It was OK if the option was not defined at all.)
5203 11. A "Completed" log line is now written for messages that are removed from
5204 the spool by the -Mrm option.
5206 12. $host_address is now set to the target address during the checking of
5207 ignore_target_hosts.
5209 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5210 being passed; this would have caused $sender_host_name to have been used if
5211 matching the list had actually called for a host name (not very likely,
5212 since this list is usually IP addresses). A host name is now passed as
5215 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5216 code that specifies a non-restarting handler (typically sigaction() in
5217 modern systems) in an attempt to fix a rare and obscure crash bug.
5219 15. Narrowed the window for a race in the daemon that could cause it to ignore
5220 SIGCHLD signals. This is not a major problem, because they are used only to
5221 wake it up if nothing else does.
5223 16. A malformed maildirsize file could cause Exim to calculate negative values
5224 for the mailbox size or file count. Odd effects could occur as a result.
5225 The maildirsize information is now recalculated if the size or filecount
5228 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5229 support for a long time. Removed HAVE_SYS_VFS_H.
5231 18. Updated exipick to current release from John Jetmore.
5233 19. Allow an empty sender to be matched against a lookup in an address list.
5234 Previously the only cases considered were a regular expression, or an
5237 20. Exim went into a mad DNS lookup loop when doing a callout where the
5238 host was specified on the transport, if the DNS lookup yielded more than
5241 21. The RFC2047 encoding function was originally intended for short strings
5242 such as real names; it was not keeping to the 75-character limit for
5243 encoded words that the RFC imposes. It now respects the limit, and
5244 generates multiple encoded words if necessary. To be on the safe side, I
5245 have increased the buffer size for the ${rfc2047: expansion operator from
5248 22. Failure to deliver a bounce message always caused it to be frozen, even if
5249 there was an errors_to setting on the router. The errors_to setting is now
5252 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5253 canonical form (fully expanded) before being placed in
5254 $sender_host_address.
5256 24. Updated eximstats to version 1.33
5258 25. Include certificate and key file names in error message when GnuTLS fails
5259 to set them up, because the GnuTLS error message doesn't include the name
5260 of the failing file when there is a problem reading it.
5262 26. Expand error message when OpenSSL has problems setting up cert/key files.
5265 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5266 (this can affect the format of dates).
5268 28. exim_tidydb, when checking for the continued existence of a message for
5269 which it has found a message-specific retry record, was not finding
5270 messages that were in split spool directories. Consequently, it was
5271 deleting retry records that should have stayed in existence.
5273 29. eximstats updated to version 1.35
5274 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5275 1.35 - bugfix such that pie charts by volume are generated correctly
5277 30. The SPA authentication driver was not abandoning authentication and moving
5278 on to the next authenticator when an expansion was forced to fail,
5279 contradicting the general specification for all authenticators. Instead it
5280 was generating a temporary error. It now behaves as specified.
5282 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5283 (the order specifies the preference for clients). The order is now AES256,
5284 AES128, 3DES, ARCFOUR128.
5286 31. Small patch to Sieve code - explicitly set From: when generating an
5289 32. Exim crashed if a remote delivery caused a very long error message to be
5290 recorded - for instance if somebody sent an entire SpamAssassin report back
5291 as a large number of 550 error lines. This bug was coincidentally fixed by
5292 increasing the size of one of Exim's internal buffers (big_buffer) that
5293 happened as part of the Exiscan merge. However, to be on the safe side, I
5294 have made the code more robust (and fixed the comments that describe what
5297 33. Some experimental protocols are using DNS PTR records for new purposes. The
5298 keys for these records are domain names, not reversed IP addresses. The
5299 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5300 leaves it alone. Component reversal etc. now happens only for IP addresses.
5303 34. The host_aton() function is supposed to be passed a string that is known
5304 to be a valid IP address. However, in the case of IPv6 addresses, it was
5305 not checking this. This is a hostage to fortune. Exim now panics and dies
5306 if the condition is not met. A case was found where this could be provoked
5307 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5308 components; fortuitously, this particular loophole had already been fixed
5309 by change 4.50/55 or 4.44/33 above.
5311 If there are any other similar loopholes, the new check in host_aton()
5312 itself should stop them being exploited. The report I received stated that
5313 data on the command line could provoke the exploit when Exim was running as
5314 exim, but did not say which command line option was involved. All I could
5315 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5316 running as the user.
5319 35. There was a buffer overflow vulnerability in the SPA authentication code
5320 (which came originally from the Samba project). I have added a test to the
5321 spa_base64_to_bits() function which I hope fixes it.
5324 36. The daemon start-up calls getloadavg() while still root for those OS that
5325 need the first call to be done as root, but it missed one case: when
5326 deliver_queue_load_max is set with deliver_drop_privilege. This is
5327 necessary for the benefit of the queue runner, because there is no re-exec
5328 when deliver_drop_privilege is set.
5330 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5331 was in use, was not putting the data itself into the right store pool;
5332 consequently, it could be overwritten for a subsequent message in the same
5333 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5336 38. Sometimes the final signoff response after QUIT could fail to get
5337 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5338 < 0 before doing a fflush(). This bug looks as though it goes back to the
5339 introduction of TLS in release 3.20, but "sometimes" must have been rare
5340 because the tests only now provoked it.
5346 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5347 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5348 Now it returns an integer. A number of calls were still expecting a T/F
5349 return. Fortuitously, in all cases, the tests worked in OK situations,
5350 which is the norm. However, things would have gone wrong on any write
5351 failures on the smtp file descriptor. This function is used when sending
5352 messages over SMTP and also when doing verify callouts.
5354 2. When Exim is called to do synchronous delivery of a locally submitted
5355 message (the -odf or -odi options), it no longer closes stderr before doing
5358 3. Implemented the mua_wrapper option.
5360 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5362 5. Implemented the functions header_remove(), header_testname(),
5363 header_add_at_position(), and receive_remove_recipient(), and exported them
5366 6. If an ACL "warn" statement specified the addition of headers, Exim already
5367 inserted X-ACL-Warn: at the start if there was no header name. However, it
5368 was not making this test for the second and subsequent header lines if
5369 there were newlines in the string. This meant that an invalid header could
5370 be inserted if Exim was badly configured.
5372 7. Allow an ACL "warn" statement to add header lines at the start or after all
5373 the Received: headers, as well as at the end.
5375 8. Added the rcpt_4xx retry error code.
5377 9. Added postmaster_mailfrom=xxx to callout verification option.
5379 10. Added mailfrom=xxxx to the callout verification option, for verify=
5382 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5383 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5385 12. Inserted some casts to stop certain compilers warning when using pointer
5386 differences as field lengths or precisions in printf-type calls (mostly
5387 affecting debugging statements).
5389 13. Added optional readline() support for -be (dynamically loaded).
5391 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5392 same clock tick as a message's arrival, so that its received time was the
5393 same as the "first fail" time on the retry record, and that message
5394 remained on the queue past the ultimate address timeout, every queue runner
5395 would try a delivery (because it was past the ultimate address timeout) but
5396 after another failure, the ultimate address timeout, which should have then
5397 bounced the address, did not kick in. This was a "< instead of <=" error;
5398 in most cases the first failure would have been in the next clock tick
5399 after the received time, and all would be well.
5401 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5402 being recognized when the domain list was tested by the match_domain
5403 condition in an expansion string.
5405 16. Added the ${str2b64: operator.
5407 17. Exim was always calling setrlimit() to set a large limit for the number of
5408 processes, without checking whether the existing limit was already
5409 adequate. (It did check for the limit on file descriptors.) Furthermore,
5410 errors from getrlimit() and setrlimit() were being ignored. Now they are
5411 logged to the main and panic logs, but Exim does carry on, to try to do its
5412 job under whatever limits there are.
5414 18. Imported PCRE 5.0.
5416 19. Trivial typo in log message " temporarily refused connection" (the leading
5419 20. If the log selector return_path_on_delivery was set and an address was
5420 redirected to /dev/null, the delivery process crashed because it assumed
5421 that a return path would always be set for a "successful" delivery. In this
5422 case, the whole delivery is bypassed as an optimization, and therefore no
5425 21. Internal re-arrangement: the function for sending a challenge and reading
5426 a response while authentication was assuming a zero-terminated challenge
5427 string. It's now changed to take a pointer and a length, to allow for
5428 binary data in such strings.
5430 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5432 23. Exim was not respecting finduser_retries when seeking the login of the
5433 uid under which it was called; it was always trying 10 times. (The default
5434 setting of finduser_retries is zero.) Also, it was sleeping after the final
5435 failure, which is pointless.
5437 24. Implemented tls_on_connect_ports.
5439 25. Implemented acl_smtp_predata.
5441 26. If the domain in control=submission is set empty, Exim assumes that the
5442 authenticated id is a complete email address when it generates From: or
5443 Sender: header lines.
5445 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5446 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5447 chown and chgrp in /bin and hostname in /usr/bin.
5449 28. Exim was keeping the "process log" file open after each use, just as it
5450 does for the main log. This opens the possibility of it remaining open for
5451 long periods when the USR1 signal hits a daemon. Occasional processlog
5452 errors were reported, that could have been caused by this. Anyway, it seems
5453 much more sensible not to leave this file open at all, so that is what now
5456 29. The long-running daemon process does not normally write to the log once it
5457 has entered its main loop, and it closes the log before doing so. This is
5458 so that log files can straightforwardly be renamed and moved. However,
5459 there are a couple of unusual error situations where the daemon does write
5460 log entries, and I had neglected to close the log afterwards.
5462 30. The text of an SMTP error response that was received during a remote
5463 delivery was being truncated at 512 bytes. This is too short for some of
5464 the long messages that one sometimes sees. I've increased the limit to
5467 31. It is now possible to make retry rules that apply only when a message has a
5468 specific sender, in particular, an empty sender.
5470 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5471 it possible to be selective about when SMTP synchronization is enforced.
5473 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5475 32. Implemented hosts_connection_nolog.
5477 33. Added an ACL for QUIT.
5479 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5482 35. Added mailbox_size and mailbox_filecount to appendfile.
5484 36. Added control = no_multiline_responses to ACLs.
5486 37. There was a bug in the logic of the code that waits for the clock to tick
5487 in the case where the clock went backwards by a substantial amount such
5488 that the microsecond fraction of "now" was more than the microsecond
5489 fraction of "then" (but the whole seconds number was less).
5491 38. Added support for the libradius Radius client library this is found on
5492 FreeBSD (previously only the radiusclient library was supported).
5498 1. When certain lookups returned multiple values in the form name=value, the
5499 quoting of the values was not always being done properly. Specifically:
5500 (a) If the value started with a double quote, but contained no whitespace,
5502 (b) If the value contained whitespace other than a space character (i.e.
5503 tabs or newlines or carriage returns) it was not quoted.
5504 This fix has been applied to the mysql and pgsql lookups by writing a
5505 separate quoting function and calling it from the lookup code. The fix
5506 should probably also be applied to nisplus, ibase and oracle lookups, but
5507 since I cannot test any of those, I have not disturbed their existing code.
5509 2. A hit in the callout cache for a specific address caused a log line with no
5510 reason for rejecting RCPT. Now it says "Previous (cached) callout
5511 verification failure".
5513 3. There was an off-by-one bug in the queryprogram router. An over-long
5514 return line was truncated at 256 instead of 255 characters, thereby
5515 overflowing its buffer with the terminating zero. As well as fixing this, I
5516 have increased the buffer size to 1024 (and made a note to document this).
5518 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5519 when Exim is waiting for an SMTP response from a remote server, Exim
5520 restarts its select() call on the socket, thereby resetting its timeout.
5521 This is not a problem when such interrupts are rare. Somebody set up a cron
5522 job to run exiwhat every 2 minutes, which is less than the normal select()
5523 timeout (5 or 10 minutes). This meant that the select() timeout never
5524 kicked in because it was always reset. I have fixed this by comparing the
5525 time when an interrupt arrives with the time at the start of the first call
5526 to select(). If more time than the timeout has elapsed, the interrupt is
5527 treated as a timeout.
5529 5. Some internal re-factoring in preparation for the addition of Sieve
5530 extensions (by MH). In particular, the "personal" test is moved to a
5531 separate function, and given an option for scanning Cc: and Bcc: (which is
5532 not set for Exim filters).
5534 6. When Exim created an email address using the login of the caller as the
5535 local part (e.g. when creating a From: or Sender: header line), it was not
5536 quoting the local part when it contained special characters such as @.
5538 7. Installed new OpenBSD configuration files.
5540 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5541 try to make them clearer.
5543 9. Callout options, other than the timeout value, were being ignored when
5544 verifying sender addresses in header lines. For example, when using
5546 verify = header_sender/callout=no_cache
5548 the cache was (incorrectly) being used.
5550 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5551 only the Cygwin environment.
5553 11. When return_path_on_delivery was set as a log selector, if different remote
5554 addresses in the same message used different return paths and parallel
5555 remote delivery occurred, the wrong values would sometimes be logged.
5556 (Whenever a remote delivery process finished, the return path value from
5557 the most recently started remote delivery process was logged.)
5559 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5560 lines when AUTH and/or TLS are in use. This is the "received protocol"
5561 field. Exim used to use "asmtp" for authenticated SMTP, without any
5562 indication (in the protocol name) for TLS use. Now it follows the RFC and
5563 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5564 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5565 names appear in log lines as well as in Received: header lines.
5567 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5568 extensions, and comparison tests, and to fix some bugs.
5570 14. Changes to the "personal" filter test:
5572 (1) The test was buggy in that it was just doing the equivalent of
5573 "contains" tests on header lines. For example, if a user's address was
5574 anne@some.where, the "personal" test would incorrectly be true for
5576 To: susanne@some.where
5578 This test is now done by extracting each address from the header in turn,
5579 and checking the entire address. Other tests that are part of "personal"
5580 are now done using regular expressions (for example, to check local parts
5581 of addresses in From: header lines).
5583 (2) The list of non-personal local parts in From: addresses has been
5584 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5585 taken from the Sieve specification recommendations.
5587 (3) If the message contains any header line starting with "List-" it is
5588 treated as non-personal.
5590 (4) The test for "circular" in the Subject: header line has been removed
5591 because it now seems ill-conceived.
5593 15. Minor typos in src/EDITME comments corrected.
5595 16. Installed latest exipick from John Jetmore.
5597 17. If headers_add on a router specified a text string that was too long for
5598 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5599 of string_sprintf() is now avoided.
5601 18. $message_body_size was not set (it was always zero) when running the DATA
5602 ACL and the local_scan() function.
5604 19. For the "mail" command in an Exim filter, no default was being set for
5605 the once_repeat time, causing a random time value to be used if "once" was
5606 specified. (If the value happened to be <= 0, no repeat happened.) The
5607 default is now 0s, meaning "never repeat". The "vacation" command was OK
5608 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5609 (I found it when inspecting the code).
5611 20. There is now an overall timeout for performing a callout verification. It
5612 defaults to 4 times the callout timeout, which applies to individual SMTP
5613 commands during the callout. The overall timeout applies when there is more
5614 than one host that can be tried. The timeout is checked before trying the
5615 next host. This prevents very long delays if there are a large number of
5616 hosts and all are timing out (e.g. when the network connections are timing
5617 out). The value of the overall timeout can be changed by specifying an
5618 additional sub-option for "callout", called "maxwait". For example:
5620 verify = sender/callout=5s,maxwait=20s
5622 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5623 to the end before writing, but this should make it even safer).
5625 22. Exim was forgetting that it had advertised PIPELINING for the second and
5626 subsequent messages on an SMTP connection. It was also not resetting its
5627 memory on STARTTLS and an internal HELO.
5629 23. When Exim logs an SMTP synchronization error within a session, it now
5630 records whether PIPELINING has been advertised or not.
5632 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5633 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5634 rather than long int.
5636 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5638 26. Added the never_mail option to autoreply.
5644 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5645 crash if the getsockname() call failed; this can happen if a connection is
5646 closed very soon after it is established. The problem was simply in the
5647 order in which certain operations were done, causing Exim to try to write
5648 to the SMTP stream before it had set up the file descriptor. The bug has
5649 been fixed by making things happen in the correct order.
5655 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5656 before the connection was closed, thus losing the rejection response.
5658 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5659 some early Solaris releases, but causes trouble in current releases where
5660 socklen_t is defined.
5662 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5665 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5668 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5669 that releasing the top of it at the end releases what was used for sub-
5670 expansions (unless the block got too big). However, discard this block if
5671 the first thing is a variable or header, so that we can use its block when
5672 it is dynamic (useful for very large $message_headers, for example).
5674 6. Lookups now cache *every* query, not just the most recent. A new, separate
5675 store pool is used for this. It can be recovered when all lookup caches are
5676 flushed. Lookups now release memory at the end of their result strings.
5677 This has involved some general refactoring of the lookup sources.
5679 7. Some code has been added to the store_xxx() functions to reduce the amount
5680 of flapping under certain conditions.
5682 8. log_incoming_interface used to affect only the <= reception log lines. Now
5683 it causes the local interface and port to be added to several more SMTP log
5684 lines, for example "SMTP connection from", and rejection lines.
5686 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5688 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5690 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5691 could be overwritten at the end of the current message (or the start of a
5692 new message if it was set in a HELO ACL). The value is now preserved for
5693 the duration of the SMTP connection.
5695 12. If a transport had a headers_rewrite setting, and a matching header line
5696 contained an unqualified address, that address was qualified, even if it
5697 did not match any rewriting rules. The underlying bug was that the values
5698 of the flags that permit the existence of unqualified sender and recipient
5699 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5700 non-local messages, and by -bnq for local messages) were not being
5701 preserved with the message after it was received.
5703 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5704 "next input=" as part of the text comprising the host identity instead of
5705 the correct text. The code was using the same buffer for two different
5706 strings. However, depending on which order the printing function evaluated
5707 its arguments, the bug did not always show up. Under Linux, for example, my
5708 test suite worked just fine.
5710 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5711 doesn't work with some older versions of Perl. It has been changed to "my",
5712 which in any case is probably the better facility to use.
5714 15. A really picky compiler found some instances of statements for creating
5715 error messages that either had too many or two few arguments for the format
5718 16. The size of the buffer for calls to the DNS resolver has been increased
5719 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5720 for addresses that have a lot of PTR records. This alleviates a problem; it
5721 does not fully solve it.
5723 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5724 buffer now truncates the list and logs the incident, which is the same
5725 action as happens when Exim is looking up a host name and its aliases.
5726 Previously in this situation something unpredictable would happen;
5727 sometimes it was "internal error: store_reset failed".
5729 18. If a server dropped the connection unexpectedly when an Exim client was
5730 using GnuTLS and trying to read a response, the client delivery process
5731 crashed while trying to generate an error log message.
5733 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5734 string, for example:
5736 warn message = H1: something\nH2: something
5738 the text was added as a single header line from Exim's point of view
5739 though it ended up OK in the delivered message. However, searching for the
5740 second and subsequent header lines using $h_h2: did not work. This has been
5741 fixed. Similarly, if a system filter added multiple headers in this way,
5742 the routers could not see them.
5744 20. Expanded the error message when iplsearch is called with an invalid key to
5745 suggest using net-iplsearch in a host list.
5747 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5748 ACLs are no longer actually imposed (and a message to that effect is
5751 22. If a "gecos" field in a passwd entry contained escaped characters, in
5752 particular, if it contained a \" sequence, Exim got it wrong when building
5753 a From: or a Sender: header from that name. A second bug also caused
5754 incorrect handling when an unquoted " was present following a character
5755 that needed quoting.
5757 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5758 was not being matched caselessly.
5760 24. Arranged for all hyphens in the exim.8 source to be escaped with
5763 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5764 properly. Recipient callout cache records were still being keyed to include
5765 the sender, even when use_sender was set false. This led to far more
5766 callouts that were necessary. The sender is no longer included in the key
5767 when use_sender is false.
5769 26. Added "control = submission" modifier to ACLs.
5771 27. Added the ${base62d: operator to decode base 62 numbers.
5773 28. dnsdb lookups can now access SRV records.
5775 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5776 the configuration file.
5778 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5779 (-v) mode. This makes the output for a verbose queue run more intelligible.
5781 31. Added a use_postmaster feature to recipient callouts.
5783 32. Added the $body_zerocount variable, containing the number of binary zero
5784 bytes in the message body.
5786 33. The time of last modification of the "new" subdirectory is now used as the
5787 "mailbox time last read" when there is a quota error for a maildir
5790 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5792 35. Added +ignore_unknown as a special item in host lists.
5794 36. Code for decoding IPv6 addresses in host lists is now included, even if
5795 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5796 address was recognized as an IP address, but was then not correctly decoded
5797 into binary, causing unexpected and incorrect effects when compared with
5804 1. Very minor rewording of debugging text in manualroute to say "list of
5805 hosts" instead of "hostlist".
5807 2. If verify=header_syntax was set, and a header line with an unqualified
5808 address (no domain) and a large number of spaces between the end of the
5809 name and the colon was received, the reception process suffered a buffer
5810 overflow, and (when I tested it) crashed. This was caused by some obsolete
5811 code that should have been removed. The fix is to remove it!
5813 3. When running in the test harness, delay a bit after writing a bounce
5814 message to get a bit more predictability in the log output.
5816 4. Added a call to search_tidyup() just before forking a reception process. In
5817 theory, someone could use a lookup in the expansion of smtp_accept_max_
5818 per_host which, without the tidyup, could leave open a database connection.
5820 5. Added the variables $recipient_data and $sender_data which get set from a
5821 lookup success in an ACL "recipients" or "senders" condition, or a router
5822 "senders" option, similar to $domain_data and $local_part_data.
5824 6. Moved the writing of debug_print from before to after the "senders" test
5827 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5828 problems for message scanning, either using a data ACL, or using
5829 local_scan() because the Received: header was not generated till after they
5830 were called (in order to set the time as the time of reception completion).
5831 I have revised the way this works. The header is now generated after the
5832 body is received, but before the ACL or local_scan() are called. After they
5833 are run, the timestamp in the header is updated.
5839 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5840 before starting a queue runner without re-exec. This happened only when
5841 deliver_drop_privilege was set or when the Exim user was set to root. The
5842 effect of the bug was that timeouts during subsequent deliveries caused
5843 crashes instead of being properly handled. The handler is now left at its
5844 default (and expected) setting.
5846 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5847 message, again when deliver_drop_privilege is set or Exim is run as root.
5848 The bug described in (1) was not present in this case, but the tidying up
5849 of the other signals was missing. I have made the two cases consistent.
5851 3. The ignore_target_hosts setting on a manualroute router was being ignored
5852 for hosts that were looked up using the /MX notation.
5854 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5857 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5858 operated on the sender address. After changing the $sender_address to <>
5859 for the sender address verify, Exim was re-instated it as the original
5860 (before rewriting) address, but remembering that it had rewritten it, so it
5861 wasn't rewriting it again. This bug also had the effect of breaking the
5862 sender address verification caching when the sender address was rewritten.
5864 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5865 This has been changed so that if the ip literal address matches
5866 ignore_target_hosts, the router declines.
5868 7. Added expansion conditions match_domain, match_address, and match_local_
5869 part (NOT match_host).
5871 8. The placeholder for the Received: header didn't have a length field set.
5873 9. Added code to Exim itself and to exim_lock to test for a specific race
5874 condition that could lead to file corruption when using MBX delivery. The
5875 issue is with the lockfile that is created in /tmp. If this file is removed
5876 after a process has opened it but before that process has acquired a lock,
5877 there is the potential for a second process to recreate the file and also
5878 acquire a lock. This could lead to two Exim processes writing to the file
5879 at the same time. The added code performs the same test as UW imapd; it
5880 checks after acquiring the lock that its file descriptor still refers to
5881 the same named file.
5883 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5884 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5887 11. Added the smtp_active_hostname option. If used, this will typically be made
5888 to depend on the incoming interface address. Because $interface_address is
5889 not set up until the daemon has forked a reception process, error responses
5890 that can happen earlier (such as "too many connections") no longer contain
5893 12. If an expansion in a condition on a "warn" statement fails because a lookup
5894 defers, the "warn" statement is abandoned, and the next ACL statement is
5895 processed. Previously this caused the whole ACL to be aborted.
5897 13. Added the iplsearch lookup type.
5899 14. Added ident_timeout as a log selector.
5901 15. Added tls_certificate_verified as a log selector.
5903 16. Added a global option tls_require_ciphers (compare the smtp transport
5904 option of the same name). This controls incoming TLS connections.
5906 17. I finally figured out how to make tls_require_ciphers do a similar thing
5907 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5908 before starting the TLS session.
5910 18. Tabs are now shown as \t in -bP output.
5912 19. If the log selector return_path_on_delivery was set, Exim crashed when
5913 bouncing a message because it had too many Received: header lines.
5915 20. If two routers both had headers_remove settings, and the first one included
5916 a superfluous trailing colon, the final name in the first list and the
5917 first name in the second list were incorrectly joined into one item (with a
5918 colon in the middle).
5924 1. Added -C and -D options to the exinext utility, mainly to make it easier
5925 to include in the automated testing, but these could be helpful when
5926 multiple configurations are in use.
5928 2. The exinext utility was not formatting the output nicely when there was
5929 an alternate port involved in the retry record key, nor when there was a
5930 message id as well (for retries that were specific to a specific message
5931 and a specific host). It was also confused by IPv6 addresses, because of
5932 the additional colons they contain. I have fixed the IPv4 problem, and
5933 patched it up to do a reasonable job for IPv6.
5935 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5936 delivery, the log line now contains "pipelined" if PIPELINING was used.
5938 4. An SMTP transport process used to panic and die if the bind() call to set
5939 an explicit outgoing interface failed. This has been changed; it is now
5940 treated in the same way as a connect() failure.
5942 5. A reference to $sender_host_name in the part of a conditional expansion
5943 that was being skipped was still causing a DNS lookup. This no longer
5946 6. The def: expansion condition was not recognizing references to header lines
5947 that used bh_ and bheader_.
5949 7. Added the _cache feature to named lists.
5951 8. The code for checking quota_filecount in the appendfile transport was
5952 allowing one more file than it should have been.
5954 9. For compatibility with Sendmail, the command line option
5962 and sets the incoming protocol and host name (for trusted callers). The
5963 host name and its colon can be omitted when only the protocol is to be set.
5964 Note the Exim already has two private options, -pd and -ps, that refer to
5965 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5966 "s", but I don't think that's a major issue.
5968 10. A number of refactoring changes to the code, none of which should affect
5971 (a) The number of logging options was getting close to filling up the
5972 32-bit word that was used as a bit map. I have split them into two classes:
5973 those that are passed in the argument to log_write(), and those that are
5974 only ever tested independently outside of that function. These are now in
5975 separate 32-bit words, so there is plenty of room for expansion again.
5976 There is no change in the user interface or the logging behaviour.
5978 (b) When building, for example, log lines, the code previously used a
5979 macro that called string_cat() twice, in order to add two strings. This is
5980 not really sufficiently general. Furthermore, there was one instance where
5981 it was actually wrong because one of the argument was used twice, and in
5982 one call a function was used. (As it happened, calling the function twice
5983 did not affect the overall behaviour.) The macro has been replaced by a
5984 function that can join an arbitrary number of extra strings onto a growing
5987 (c) The code for expansion conditions now uses a table and a binary chop
5988 instead of a serial search (which was left over from when there were very
5989 few conditions). Also, it now recognizes conditions like "pam" even when
5990 the relevant support is not compiled in: a suitably worded error message is
5991 given if an attempt is made to use such a condition.
5993 11. Added ${time_interval:xxxxx}.
5995 12. A bug was causing one of the ddress fields not to be passed back correctly
5996 from remote delivery subprocesses. The field in question was not being
5997 subsequently used, so this caused to problems in practice.
5999 13. Added new log selectors queue_time and deliver_time.
6001 14. Might have fixed a bug in maildirsizefile handling that threw up
6002 "unexpected character" debug warnings, and recalculated the data
6003 unnecessarily. In any case, I expanded the warning message to give more
6006 15. Added the message "Restricted characters in address" to the statements in
6007 the default ACL that block characters like @ and % in local parts.
6009 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6010 Three changes have been made:
6012 (a) There was a serious bug; a negative response to MAIL caused the whole
6013 recipient domain to be cached as invalid, thereby blocking all messages
6014 to all local parts at the same domain, from all senders. This bug has
6015 been fixed. The domain is no longer cached after a negative response to
6016 MAIL if the sender used is not empty.
6018 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6021 (c) A new callout option, "use_sender" has been added for people who want
6022 the modified behaviour.
6028 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6031 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6032 indeed breaks things for older releases.
6034 3. Added additional logging to the case where there is a problem reading data
6035 from a filter that is running in a subprocess using a pipe, in order to
6036 try to track down a specific problem.
6038 4. Testing facility fudge: when running in the test harness and attempting
6039 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6040 getting "No route to host". Convert this to a timeout.
6042 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6045 6. Some OS don't have socklen_t but use size_t instead. This affects the
6046 fifth argument of getsockopt() amongst other things. This is now
6047 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6048 can be set for individual OS. I have set it for SunOS5, OSF1, and
6049 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6050 some earlier ones do not.
6052 7. Change 4.30/15 was not doing the test caselessly.
6054 8. The standard form for an IPv6 address literal was being rejected by address
6055 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6056 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6057 this, as well as the form without the "IPv6" on the front (but only when
6058 address literals are enabled, of course).
6060 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6062 10. Exim crashed if a message with an empty sender address specified by -f
6063 encountered a router with an errors_to setting. This could be provoked only
6064 by a command such as
6068 where an empty string was supplied; "<>" did not hit this bug.
6070 11. Installed PCRE release 4.5.
6072 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6073 remained set. It is now erased.
6075 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6076 times from message ids (which are base 36 rather than the normal 62).
6078 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6079 were being counted as actual protocol errors, and logged if the log
6080 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6081 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6082 and DATA following a set of rejected RCPTs do not count as protocol errors.
6083 In other words, Exim assumes they were pipelined, though this may not
6084 actually be the case. Of course, in all cases the client gets an
6085 appropriate error code.
6087 15. If a lookup fails in an ACL condition, a message about the failure may
6088 be available; it is used if testing the ACL cannot continue, because most
6089 such messages specify what the cause of the deferral is. However, some
6090 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6091 that caused an old message to be retained and used if a later statement
6092 caused a defer, replacing the real cause of the deferral.
6094 16. If an IP address had so many PTR records that the DNS lookup buffer
6095 was not large enough to hold them, Exim could crash while trying to process
6096 the truncated data. It now detects and logs this case.
6098 17. Further to 4.21/58, another change has been made: if (and only if) the
6099 first line of a message (the first header line) ends with CRLF, a bare LF
6100 in a subsequent header line has a space inserted after it, so as not to
6101 terminate the header.
6103 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6104 unnecessarily, used atoi() instead of strtol(), and didn't check the
6105 termination when getting file sizes from file names by regex.
6107 19. Completely re-implemented the support for maildirsize files, in the light
6108 of a number of problems with the previous contributed implementation
6109 (4.30/29). In particular:
6111 . If the quota is zero, the maildirsize file is maintained, but no quota is
6114 . If the maildir directory does not exist, it is created before any attempt
6115 to write a maildirsize file.
6117 . The quota value in the file is just a cache; if the quota is changed in
6118 the transport, the new value overrides.
6120 . A regular expression is available for excluding directories from the
6123 20. The autoreply transport checks the characters in options that define the
6124 message's headers; it allows continued headers, but it was checking with
6125 isspace() after an embedded newline instead of explicitly looking for a
6128 21. If all the "regular" hosts to which an address was routed had passed their
6129 expiry times, and had not reached their retry times, the address was
6130 bounced, even if fallback hosts were defined. Now Exim should go on to try
6133 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6134 equivalent code in the SMTP transport. Some hosts send humungous responses
6135 to HELO/EHLO, more than 1024 it seems.
6137 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6138 gives compiler warnings in some environments. I've now done it "properly",
6141 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6142 (because of problems with the built-in one) was declared to return uschar *
6143 instead of char *, causing compiler failure.
6145 25. Fixed a file descriptor leak when processing alias/forward files.
6147 26. Fixed a minor format string issue in dbfn.c.
6149 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6151 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6152 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6155 29. When a sender address is verified, it is cached, to save repeating the test
6156 when there is more than one recipient in a message. However, when the
6157 verification involves a callout, it is possible for different callout
6158 options to be set for different recipients. It is too complicated to keep
6159 track of this in the cache, so now Exim always runs a verification when a
6160 callout is required, relying on the callout cache for the optimization.
6161 The overhead is duplication of the address routing, but this should not be
6164 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6165 to be verified with callout=postmaster, and the main callout worked but the
6166 postmaster check failed, the verification correctly failed. However, if a
6167 subsequent RCPT command asked for sender verification *without* the
6168 postmaster check, incorrect caching caused this verification also to fail,
6171 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6172 it was not caching the DNS options (qualify_single, search_parents) that
6173 were used when the lookup failed. A subsequent lookup with different
6174 options therefore always gave the same answer, though there were cases
6175 where it should not have. (Example: a "domains = !$mx_any" option on a
6176 dnslookup router: the "domains" option is always processed without any
6177 widening, but the router might have qualify_single set.) Now Exim uses the
6178 cached value only when the same options are set.
6180 32. Added John Jetmore's "exipick" utility to the distribution.
6182 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6183 than a timeout (e.g. a certificate is required, and is not provided), an
6184 Exim server now closes the connection immediately. Previously it waited for
6185 the client to close - but if the client is SSL, it seems that they each
6186 wait for each other, leading to a delay before one of them times out.
6188 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6189 maintained 0.8.x compatibility because I don't think many are using it, and
6190 it is clearly obsolete.
6192 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6195 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6196 client certificate was expired. A simple patch fixes this, though I don't
6197 understand the full logic of why the verify callback is called multiple
6200 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6201 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6202 which causes problems with some clients (such as the Certicom SSL Plus
6203 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6204 disables the coutermeasure allowing Eudora to connect."
6206 38. Exim was not checking that a write() to a log file succeeded. This could
6207 lead to Bad Things if a log got too big, in particular if it hit a file
6208 size limit. Exim now panics and dies if it cannot write to a log file, just
6209 as it does if it cannot open a log file.
6211 39. Modified OS/Makefile-Linux so that it now contains
6213 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6215 The two -D definitions ensure that Exim is compiled with large file
6216 support, which makes it possible to handle log files that are bigger than
6219 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6220 instance) a domain was checked against a named list that involved a lookup,
6221 causing $domain_data to be set, then another domain was checked against the
6222 same list, then the first domain was re-checked, the value of $domain_data
6223 after the final check could be wrong. In particular, if the second check
6224 failed, it could be set empty. This bug probably also applied to
6227 41. The strip_trailing_dot option was not being applied to the address given
6228 with the -f command-line option.
6230 42. The code for reading a message's header from the spool was incrementing
6231 $received_count, but never initializing it. This meant that the value was
6232 incorrect (doubled) while delivering a message in the same process in which
6233 it was received. In the most common configuration of Exim, this never
6234 happens - a fresh exec is done - but it can happen when
6235 deliver_drop_privilege is set.
6237 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6238 it now includes up to 150 characters of the unexpected data in the log
6241 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6242 and building data strings. The size of both of these buffers was 10 000
6243 bytes - far larger than anybody would *ever* want, thought I. Needless to
6244 say, somebody hit the limit. I have increased the maximum line length to
6245 20 000 and the maximum data length of concatenated lines to 100 000. I have
6246 also fixed two bugs, because there was no checking on these buffers. Tsk,
6247 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6248 buffer is too small.
6250 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6251 lsearch lookups. Now it does.
6253 46. When parsing a route_list item in a manualroute router, a fixed-length
6254 buffer was used for the list of hosts. I made this 1024 bytes long,
6255 thinking that nobody would ever have a list of hosts that long. Wrong.
6256 Somebody had a whole pile of complicated expansion conditions, and the
6257 string was silently truncated, leading to an expansion error. It turns out
6258 that it is easier to change to an unlimited length (owing to other changes
6259 that have happened since this code was originally written) than to build
6260 structure for giving a limitation error. The length of the item that
6261 expands into the list of hosts is now unlimited.
6263 47. The lsearch lookup could not handle data where the length of text line was
6264 more than 4095 characters. Such lines were truncated, leading to shortened
6265 data being returned. It should now handle lines of any length.
6267 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6268 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6271 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6272 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6273 no longer happens in comment lines. A list of replacements is now placed
6274 at the head of all of the source files, except those whose only change is
6275 to replace PERL_COMMAND in the very first #! line.
6277 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6278 messages on the queue, with a bottom-up merge sort, using code contributed
6279 by Michael Haardt. This should make operations like -bp somewhat faster on
6280 large queues. It won't affect queue runners, except when queue_run_in_order
6283 51. Installed eximstats 1.31 in the distribution.
6285 52. Added support for SRV lookups to the dnslookup router.
6287 53. If an ACL referred to $message_body or $message_body_end, the value was not
6288 reset for any messages that followed in the same SMTP session.
6290 54. The store-handling optimization for building very long strings was not
6291 differentiating between the different store pools. I don't think this
6292 actually made any difference in practice, but I've tidied it.
6294 55. While running the routers to verify a sender address, $sender_address
6295 was still set to the sender address. This is wrong, because when routing to
6296 send a bounce to the sender, it would be empty. Therefore, I have changed
6297 it so that, while verifying a sender address, $sender_address is set to <>.
6298 (There is no change to what happens when verifying a recipient address.)
6300 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6301 target A or AAAA records (if not already returned) without resetting the
6302 qualify_single or search_parents options of the DNS resolver. These are
6303 inappropriate in this case because the targets of MX and SRV records must
6304 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6305 target that, when qualified, matched something in the local domain. These
6306 two options are now turned off when doing these lookups.
6308 57. It seems that at least some releases of Reiserfs (which does not have the
6309 concept of a fixed number of inodes) returns zero and not -1 for the
6310 number of available inodes. This interacted badly with check_spool_inodes,
6311 which assumed that -1 was the "no such thing" setting. What I have done is
6312 to check that the total number of inodes is greater than zero before doing
6313 the test of how many are available.
6315 58. When a "warn" ACL statement has a log_message modifier, the message is
6316 remembered, and not repeated. This is to avoid a lot of repetition when a
6317 message has many recipients that cause the same warning to be written.
6318 However, Exim was preserving the list of already written lines for an
6319 entire SMTP session, which doesn't seem right. The memory is now reset if a
6320 new message is started.
6322 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6323 debugging output unless log_rewrite was also set.
6325 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6326 of (int)(handle) when we know that handle contains (void *)(-1).
6328 61. The Exim daemon panic-logs an error return when it closes the incoming
6329 connection. However "connection reset by peer" seems to be common, and
6330 isn't really an error worthy of noting specially, so that particular error
6333 62. When Exim is trying to find all the local interfaces, it used to panic and
6334 die if the ioctl to get the interface flags failed. However, it seems that
6335 on at least one OS (Solaris 9) it is possible to have an interface that is
6336 included in the list of interfaces, but for which you get a failure error
6337 for this call. This happens when the interface is not "plumbed" into a
6338 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6339 failure of the "get flags" call assumes that the interface is down.
6341 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6342 makes life easier for people who are doing arithmetic on fields extracted
6343 from dates, where you often get leading zeros that should not be
6344 interpreted as octal.
6346 64. Added qualify_domain to the redirect router, to override the global
6349 65. If a pathologically long header line contained very many addresses (the
6350 report of this problem mentioned 10 000) and each of them was rewritten,
6351 Exim could use up a very large amount of memory. (It kept on making new
6352 copies of the header line as it rewrote, and never released the old ones.)
6353 At the expense of a bit more processing, the header rewriting function has
6354 been changed so that it no longer eats memory in this way.
6356 66. The generation of the Received: header has been moved from the time that a
6357 message starts to be received, to the time that it finishes. The timestamp
6358 in the Received: header should now be very close to that of the <= log
6359 line. There are two side-effects of this change:
6361 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6362 logged header lines no longer include the local Received: line, because
6363 it has not yet been created. The same applies to a copy of the message
6364 that is returned to a non-SMTP sender when a message is rejected.
6366 (b) When a filter file is tested using -bf, no additional Received: header
6367 is added to the test message. After some thought, I decided that this
6370 This change does not affect the value of $received_for. It is still set
6371 after address rewriting, but before local_scan() is called.
6373 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6375 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6376 gave an unhelpful panic error message, and a defer error. I have managed to
6377 change this behaviour so that it now rejects any supplied certificate,
6378 which seems right, as the list of acceptable certificates is empty.
6380 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6381 gave an unhelpful defer error. I have not managed to make this reject any
6382 supplied certificates, but the error message it gives is "no certificate
6383 supplied", which is not helpful.
6385 70. exigrep's output now also includes lines that are not associated with any
6386 message, but which match the given pattern. Implemented by a patch from
6387 Martin Sluka, which also tidied up the Perl a bit.
6389 71. Recipient callout verification, like sender verification, was using <> in
6390 the MAIL FROM command. This isn't really the right thing, since the actual
6391 sender may affect whether the remote host accepts the recipient or not. I
6392 have changed it to use the actual sender in the callout; this means that
6393 the cache record is now keyed on a recipient/sender pair, not just the
6394 recipient address. There doesn't seem to be a real danger of callout loops,
6395 since a callout by the remote host to check the sender would use <>.
6396 [SEE ABOVE: changed after hitting problems.]
6398 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6399 temporary errors. However, in the case of such a code being given after
6400 the end of a data transmission (i.e. after ".") Exim was failing to write
6401 a retry record for the message. (Yes, there was some broken host that was
6402 actually sending 8xx at this point.)
6404 73. An unknown lookup type in a host list could cause Exim to panic-die when
6405 the list was checked. (An example that provoked this was putting <; in the
6406 middle of a list instead of at the start.) If this happened during a DATA
6407 ACL check, a -D file could be left lying around. This kind of configuration
6408 error no longer causes Exim to die; instead it causes a defer error. The
6409 incident is still logged to the main and panic logs.
6411 74. Buglet left over from Exim 3 conversion. The message "too many messages
6412 in one connection" was written to the rejectlog but not the mainlog, except
6413 when address rewriting (yes!) was being logged.
6415 75. Added write_rejectlog option.
6417 76. When a system filter was run not as root (that is, when system_filter_user
6418 was set), the values of the $n variables were not being returned to the
6419 main process; thus, they were not subsequently available in the $sn
6422 77. Added +return_path_on_delivery log selector.
6424 78. A connection timeout was being treated differently from recipients deferred
6425 when testing hosts_max_try with a message that was older than the host's
6426 retry timeout. (The host should not be counted, thus allowing all hosts to
6427 be tried at least once before bouncing.) This may have been the cause of an
6428 occasionally reported bug whereby a message would remain on the queue
6429 longer than the retry timeout, but would be bounced if a delivery was
6430 forced. I say "may" because I never totally pinned down the problem;
6431 setting up timeout/retry tests is difficult. See also the next item.
6433 79. The ultimate address timeout was not being applied to errors that involved
6434 a combination of host plus message (for example, a timeout on a MAIL
6435 command). When an address resolved to a number of possible hosts, and they
6436 were not all tried for each delivery (e.g. because of hosts_max_try), a
6437 message could remain on the queue longer than the retry timeout.
6439 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6442 81. Fixed an obscure SMTP outgoing bug which required at least the following
6443 conditions: (a) there was another message waiting for the same server;
6444 (b) the server returned 5xx to all RCPT commands in the first message so
6445 that the message was not completed; (c) the server dropped the connection
6446 or gave a negative response to the RSET that Exim sends to abort the
6447 transaction. The observed case was a dropped connection after DATA that had
6448 been sent in pipelining mode. That is, the server had advertised PIPELINING
6449 but was not implementing it correctly. The effect of the bug was incorrect
6450 behaviour, such as trying another host, and this could lead to a crash.
6456 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6457 and daemon.c were passed as pointers to ints; they should have been
6458 pointers to socklen_t variables (which are typically unsigned ints).
6460 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6463 3. Fixed a really odd bug that affected only the testing scheme; patching a
6464 certain fixed string in the binary changed the value of another string that
6465 happened to be identical to the end of the original first string.
6467 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6468 name", it returns that address as the IP address. On some operating
6469 systems (e.g. Solaris), it also passes back the IP address string as the
6470 "host name". However, on others (e.g. Linux), it passes back an empty
6471 string. Exim wasn't checking for this, and was changing the host name to an
6472 empty string, assuming it had been canonicalized.
6474 5. Although rare, it is permitted to have more than one PTR record for a given
6475 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6476 all the names associated with an address, because they do in Solaris.
6477 However, it seems that they do not in Linux for data that comes from the
6478 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6479 I found this out when I moved to a new Linux workstation and tried to run
6480 the Exim test suite.
6482 To get round this problem I have changed the code so that it now does its
6483 own call to the DNS to look up PTR records when searching for a host name.
6484 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6485 addresses that are only in /etc/hosts are still found.
6487 This behaviour is, however, controlled by an option called host_lookup_
6488 order, which defaults to "bydns:byaddr". If people want to use the other
6489 order, or indeed, just use one or the other means of lookup, they can
6490 specify it in this variable.
6492 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6493 some operating systems, this comes back from gethostbyaddr() as an empty
6494 string, and this is what Exim used to test for. However, it seems that in
6495 other systems, "." is yielded. Exim now tests for this case too.
6497 7. The values of check_spool_space and check_log_space are now held internally
6498 as a number of kilobytes instead of an absolute number of bytes. If a
6499 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6500 kilobyte. This means that much larger values can be stored.
6502 8. Exim monitor: an attempt to get the action menu when not actually pointing
6503 at a message produces an empty menu entitled "No message selected". This
6504 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6505 no entries in it ("Shell widget menu has zero width and/or height"). So I
6506 have added a single, blank menu entry in this case.
6508 9. Added ${quote_local_part.
6510 10. MIME decoding is now applied to the contents of Subject: header lines when
6513 11. Now that a reference to $sender_host_address automatically causes a reverse
6514 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6515 host lookup before query-style lookups in lists that might use this
6516 variable. This has therefore been abolished, and the "net-" prefix is no
6517 longer necessary for query-style lookups.
6519 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6520 have been a typo for LFLAGS, so it has been changed.
6522 13. The install script calls Exim with "-C /dev/null" in order to find the
6523 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6524 to be output. However, since Exim outputs its version number before the
6525 error, it didn't break the script. It just looked ugly. I fixed this by
6526 always allowing "-C /dev/null" if the caller is root.
6528 14. Ignore overlarge ACL variable number when reading spool file - insurance
6529 against a later release with more variables having written the file.
6531 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6532 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6533 this, as well as the form without the "IPv6" on the front.
6535 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6536 OS/Makefile-Darwin file.
6538 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6539 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6541 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6542 variable. However, some OS use ints for inodes. I've added cast to long int
6543 to get rid of the compiler warning.
6545 19. I had forgotten to lock out "/../" in configuration file names when
6546 ALT_CONFIG_PREFIX was set.
6548 20. Routers used for verification do not need to specify transports. However,
6549 if such a router generated a host list, and callout was configured, Exim
6550 crashed, because it could not find a port number from the (non-existent)
6551 transport. It now assumes port 25 in this circumstance.
6553 21. Added the -t option to exigrep.
6555 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6556 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6557 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6558 them is set, LOOKUP_LSEARCH is forced.
6560 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6562 24. Added sender and host information to the "rejected by local_scan()" log
6563 line; previously there was no indication of these.
6565 25. Added .include_if_exists.
6567 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6568 Linux. It turns out that not all file systems support this. Apparently some
6569 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6570 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6571 not supported on the file descriptor, is now ignored when Exim is trying to
6572 sync a directory. This applies only to Linux.
6574 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6576 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6577 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6580 29. Added support for maildirsize files from supplied patch (modified a bit).
6582 30. The use of :fail: followed by an empty string could lead Exim to respond to
6583 sender verification failures with (e.g.):
6585 550 Verification failed for <xxx>
6586 550 Sender verify failed
6588 where the first response line was missing the '-' that indicates it is not
6589 the final line of the response.
6591 31. The loop for finding the name of the user that called Exim had a hardwired
6592 limit of 10; it now uses the value of finduser_retries, which is used for
6593 all other user lookups.
6595 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6598 33. Exim was neglecting to zero errno before one call of strtol() when
6599 expanding a string and expecting an integer value. On some systems this
6600 resulted in spurious "integer overflow" errors. Also, it was casting the
6601 result into an int without checking.
6603 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6604 did not work. The code looks as if it has *never* worked, though it appears
6605 to have been documented since at least release 1.62. I have made it work.
6607 35. The "timeout_DNS" error in retry rules, also documented since at least
6608 1.62, also never worked. As it isn't clear exactly what this means, and
6609 clearly it isn't a major issue, I have abolished the feature by treating it
6610 as "timeout", and writing a warning to the main and panic logs.
6612 36. The display of retry rules for -brt wasn't always showing the error code
6615 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6616 timeout_connect_A, timeout_connect_MX.
6618 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6619 to the empty sender.
6621 39. The daemon was not analysing the content of -oX till after it had closed
6622 stderr and disconnected from the controlling terminal. This meant that any
6623 syntax errors were only noted on the panic log, and the return code from
6624 the command was 0. By re-arranging the code a little, I've made the
6625 decoding happen first, so such errors now appear on stderr, and the return
6626 code is 1. However, the actual setting up of the sockets still happens in
6627 the disconnected process, so errors there are still only recorded on the
6630 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6631 connections (as happens on some IP stacks) was logged at start up time as
6632 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6633 it from "IPv6 and IPv4", which means that two separate sockets are being
6636 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6637 says whether AF_INET or AF_INET6 was passed as an argument.
6639 42. Exiwhat output was messed up when time zones were included in log
6642 43. Exiwhat now gives more information about the daemon's listening ports,
6643 and whether -tls-on-connect was used.
6645 44. The "port" option of the smtp transport is now expanded.
6647 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6648 silently ignored. Now an error message is written to the main and panic
6651 46. There's a new ACL modifier called "logwrite" which writes to a log file
6652 as soon as it is encountered.
6654 47. Added $local_user_uid and $local_user_gid at routing time.
6656 48. Exim crashed when trying to verify a sender address that was being
6659 49. Exim was recognizing only a space character after ".include". It now also
6660 recognizes a tab character.
6662 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6663 extracting the relevant information from the specification. The man page no
6664 longer contains scrambled data for the -d option, and I've added a section
6665 at the front about calling Exim under different names.
6667 51. Added "extra_headers" argument to the "mail" command in filter files.
6669 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6672 53. Installed eximstats 1.29.
6674 54. Added transport_filter_timeout as a generic transport option.
6676 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6677 Cc: header lines. This was required by RFC 822, but it not required by RFC
6680 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6681 incoming messages that did not have them. Now it does so only if the
6682 message originates locally, that is, if there is no associated remote host
6683 address. When Resent- header lines are present, this applies to the Resent-
6684 lines rather than the non-Resent- lines.
6686 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6687 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6689 58. Messages for configuration errors now include the name of the main
6690 configuration file - useful now that there may be more than one file in a
6691 list (.included file names were always shown).
6693 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6694 for those rare installations that do not start the daemon as root or run it
6695 setuid root. I've cut out the call to initgroups() if the daemon is not
6698 60. The Exim user and group can now be bound into the binary as text strings
6699 that are looked up at the start of Exim's processing.
6701 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6703 62. Added $mailstore_basename variable.
6705 63. Installed patch to sieve.c from Michael Haardt.
6707 64. When Exim failed to open the panic log after failing to open the main log,
6708 the original message it was trying to log was written to stderr and debug
6709 output, but if they were not available (the usual case in production), it
6710 was lost. Now it is written to syslog before the two lines that record the
6711 failures to open the logs.
6713 65. Users' Exim filters run in subprocesses under the user's uid. It is
6714 possible for a "deliver" command or an alias in a "personal" command to
6715 provoke an address rewrite. If logging of address rewriting is configured,
6716 this fails because the process is not running as root or exim. There may be
6717 a better way of dealing with this, but for the moment (because 4.30 needs
6718 to be released), I have disabled address rewrite logging when running a
6719 filter in a non-root, non-exim process.
6725 1. The buildconfig auxiliary program wasn't quoting the value set for
6726 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6727 not defined. This bug was masked in 4.22 by the effect that was fixed in
6730 2. Some messages that were rejected after a message id was allocated were
6731 shown as "incomplete" by exigrep. It no longer does this for messages that
6732 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6734 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6735 have allow_domain_literals set, the ID did not get logged in the <= line.
6736 Domain literals are now always recognized in Message-ID: header lines.
6738 4. The first argument for a ${extract expansion item is the key name or field
6739 number. Leading and trailing spaces in this item were not being ignored,
6740 causing some misleading effects.
6742 5. When deliver_drop_privilege was set, single queue runner processes started
6743 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6744 same command in the process it spins off) were not dropping privilege.
6746 6. When the daemon running as "exim" started a queue runner, it always
6747 re-executed Exim in the spun-off process. This is a waste of effort when
6748 deliver_drop_privilege is set. The new process now just calls the
6749 queue-runner function directly.
6755 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6758 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6759 ignored. Though the use of -oP was forcing the writing of a pid file, it
6760 was always written to the default place.
6762 3. If the message "no IP address found for host xxxx" is generated during
6763 incoming verification, it is now followed by identification of the incoming
6764 connection (so you can more easily find what provoked it).
6766 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6768 5. Added some features to "harden" Exim a bit more against certain attacks:
6770 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6771 be put in Local/Makefile. This is like the never_users runtime option,
6772 but it cannot be overridden. The default setting is "root".
6774 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6775 prefix string with which any file named in a -C command line option
6778 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6779 is retained for -C and -D only if the caller of Exim is root. Without
6780 it, the exim user may also use -C and -D and retain privilege.
6782 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6783 command line option is disabled.
6785 6. Macro names set by the -D option must start with an upper case letter, just
6786 like macro names defined in the configuration file.
6788 7. Added "dereference=" facility to LDAP.
6790 8. Two instances of the typo "uknown" in the source files are fixed.
6792 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6793 the Configure-Makefile script screwed up while processing it.
6795 10. Incorporated PCRE 4.4.
6797 11. The SMTP synchronization check was not operating right at the start of an
6798 SMTP session. For example, it could not catch a HELO sent before the client
6799 waited for the greeting. There is now a check for outstanding input at the
6800 point when the greeting is written. Because of the duplex, asynchronous
6801 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6802 way, but not yet received, when the check is performed.
6804 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6805 on TCP/IP sockets, because this apparently causes some broken clients to
6808 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6809 unchanged) from the Cygwin maintainer.
6811 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6812 was supported instead of testing for mbx. Effectively a typo.
6814 15. The spa authenticator server code was not checking that the input it
6815 received was valid base64.
6817 16. The debug output line for the "set" modifier in ACLs was not showing the
6818 name of the variable that was being set.
6820 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6822 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6823 lookup on its own. Something else was needed to trigger the lookup. For
6824 example, a match in host_lookup or the need for a host name in a host list.
6825 Now, if $sender_host_name is referenced and the host name has not yet been
6826 looked up, a lookup is performed. If the lookup fails, the variable remains
6827 empty, and $host_lookup_failed is set to "1".
6829 19. Added "eqi" as a case-independent comparison operator.
6831 20. The saslauthd authentication condition could segfault if neither service
6832 nor realm was specified.
6834 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6835 error message that was logged was misleading, and incoming SMTP
6836 connections were dropped. The message is now more accurate, and temporary
6837 errors are given to SMTP connections.
6839 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6840 (except RSET) with a 421 error, until QUIT is received. However, it was
6841 failing to send a response to QUIT.
6843 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6844 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6845 ACL is now run after the helo_try_verify_hosts code.
6847 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6848 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6849 case-independent, so other case variants are also recognized). Apparently
6850 some systems use these upper case variants.
6852 25. If more than two messages were waiting for the same host, and a transport
6853 filter was specified for the transport, Exim sent two messages over the
6854 same TCP/IP connection, and then failed with "socket operation on non-
6855 socket" when it tried to send the third.
6857 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6859 27. The extern definition of crypt16() in expand.c was not being excluded when
6860 the OS had its own crypt16() function.
6862 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6863 as a preferred synonym for return_size_limit, both as an option and as an
6866 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6868 30. Changed the default configuration ACL to relax the local part checking rule
6869 for addresses that are not in any local domains. For these addresses,
6870 slashes and pipe symbols are allowed within local parts, but the sequence
6871 /../ is explicitly forbidden.
6873 31. SPA server authentication was not clearing the challenge buffer before
6876 32. log_message in a "warn" ACL statement was writing to the reject log as
6877 well as to the main log, which contradicts the documentation and doesn't
6878 seem right (because no rejection is happening). So I have stopped it.
6880 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6881 However, I am unable to do any testing of this.
6883 34. Fixed an infelicity in the appendfile transport. When checking directories
6884 for a mailbox, to see if any needed to be created, it was accidentally
6885 using path names with one or more superfluous leading slashes; tracing
6886 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6888 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6889 contents are added to the log line that is written for every discarded
6890 recipient. (Previously a log_message setting was ignored.)
6892 36. The ${quote: operator now quotes the string if it is empty.
6894 37. The install script runs exim in order to find its version number. If for
6895 some reason other than non-existence or emptiness, which it checks, it
6896 could not run './exim', it was installing it with an empty version number,
6897 i.e. as "exim-". This error state is now caught, and the installation is
6900 38. An argument was missing from the function that creates an error message
6901 when Exim fails to connect to the socket for saslauthd authentication.
6902 This could cause Exim to crash, or give a corrupted message.
6904 39. Added isip, isip4, and isip6 to ${if conditions.
6906 40. The ACL variables $acl_xx are now saved with the message, and can be
6907 accessed later in routers, transports, and filters.
6909 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6910 strings in the file are not string-expanded.
6912 42. If a MAIL command specified a SIZE value that was too large to fit into an
6913 int variable, the check against message_size_limit failed. Such values are
6914 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6915 day this will have to be increased, but I don't think I want to be around
6916 when emails are that large.
6923 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6924 iconv() is not standard in FreeBSD.
6926 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6927 IPv6 enabled. The observed symptom was a segmentation fault on return from
6928 the function os_common_find_running_interfaces() in src/os.c.
6930 3. In the check_special_case() function in daemon.c I had used "errno" as an
6931 argument name, which causes warnings on some systems. This was basically a
6932 typo, since it was named "eno" in the comments!
6934 4. The code that waits for the clock to tick (at a resolution of some fraction
6935 of a second) so as to ensure message-id uniqueness was always waiting for
6936 at least one whole tick, when it could have waited for less. [This is
6937 almost certainly not relevant at current processor speeds, where it is
6938 unlikely to ever wait at all. But we try to future-proof.]
6940 5. The function that sleeps for a time interval that includes fractions of a
6941 second contained a race. It did not block SIGALRM between setting the
6942 timer, and suspending (a couple of lines later). If the interval was short
6943 and the sigsuspend() was delayed until after it had expired, the suspension
6944 never ended. On busy systems this could lead to processes getting stuck for
6947 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6948 process, before it forks any delivery processes. The open lookup caching
6949 mechanism meant that the open file or database connection was passed into
6950 the delivery process. The problem was that delivery processes always tidy
6951 up cached lookup data. This could cause a problem for the next delivery
6952 process started by the queue runner, because the external queue runner
6953 process does not know about the closure. So the next delivery process
6954 still has data in the lookup cache. In the case of a file lookup, there was
6955 no problem because closing a file descriptor in a subprocess doesn't affect
6956 the parent. However, if the lookup was caching a connection to a database,
6957 the connection was closed, and the second delivery process was likely to
6958 see errors such as "PGSQL: query failed: server closed the connection
6959 unexpectedly". The problem has been fixed by closing all cached lookups
6960 in a queue runner before running a delivery process.
6962 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6963 seem to have the "const" qualifier which it has on other OS. I've
6966 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6967 *of the same type* (client or server) with the same public name that an
6968 error should be diagnosed.
6970 9. When Exim looked up a host name for an IP address, but failed to find the
6971 original IP address when looking up the host name (a safety check), it
6972 output the message "<ip address> does not match any IP for NULL", which was
6973 confusing, to say the least. The bug was that the host name should have
6974 appeared instead of "NULL".
6976 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6977 user that is built into the binary, and the -C or -D options is used, root
6978 privilege is dropped before the configuration file is read. In addition,
6979 logging is switched to stderr instead of the normal log files. If the
6980 configuration then re-defines the Exim user, the unprivileged environment
6981 is probably not what is expected, so Exim logs a panic warning message (but
6984 However, if deliver_drop_privilege is set, the unprivileged state may well
6985 be exactly what is intended, so the warning has been cut out in that case,
6986 and Exim is allowed to try to write to its normal log files.
6992 1. smtp_return_error_details was not giving details for temporary sender
6993 or receiver verification errors.
6995 2. Diagnose a configuration error if two authenticators have the same public
6998 3. Exim used not to create the message log file for a message until the first
6999 delivery attempt. This could be confusing when incoming messages were held
7000 for policy or load reasons. The message log file is now created at the time
7001 the message is received, and an initial "Received" line is written to it.
7003 4. The automatically generated man page for command line options had a minor
7004 bug that caused no ill effects; however, a more serious problem was that
7005 the procedure for building the man page automatically didn't always
7006 operate. Consequently, release 4.20 contains an out-of-date version. This
7007 shouldn't happen again.
7009 5. When building Exim with embedded Perl support, the script that builds the
7010 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7011 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7013 6. The freeze_tell option was not being used for messages that were frozen on
7014 arrival, either by an ACL or by local_scan().
7016 7. Added the smtp_incomplete_transaction log selector.
7018 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7019 was accepting AUTH without a new EHLO.
7021 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7022 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7025 10. Logging of TCP/IP connections (when configured) now happens in the main
7026 daemon process instead of the child process, so that the TCP/IP connection
7027 count is more accurate (but it can never be perfect).
7029 11. The use of "drop" in a nested ACL was not being handled correctly in the
7030 outer ACL. Now, if condition failure induced by the nested "drop" causes
7031 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7032 or "require"), the connection is dropped.
7034 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7035 that yield "discard" can now be used with an "accept" or a "discard" verb,
7036 but an error is generated for any others (because I can't see a useful way
7037 to define what should happen).
7039 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7040 are now processed in the same way as lines in the Exim configuration file.
7041 In particular, continuation lines are supported.
7043 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7045 15. Added -ti meaning -t -i.
7047 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7048 domains, and warn by logging if others are found.
7050 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7051 returned from GIFCONF when Exim is trying to find the list of interfaces on
7052 a host. The code in os.c has been modified to copy each ifreq to an aligned
7053 structure in all cases.
7055 Also, in some cases, the returned ifreq's were being copied to a 'struct
7056 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7057 means the last couple of bytes of an IPv6 address could be chopped if the
7058 ifreq contained only a normal sockaddr (14 bytes storage).
7060 18. Named domain lists were not supported in the hosts_treat_as_local option.
7061 An entry such as +xxxx was not recognized, and was treated as a literal
7064 19. Ensure that header lines added by a DATA ACL are included in the reject log
7065 if the ACL subsequently rejects the message.
7067 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7068 MD5 (which is deprecated).
7070 21. When testing a filter file using -bf, Exim was writing a message when it
7071 took the sender from a "From " line in the message, but it was not doing so
7072 when it took $return_path from a Return-Path: header line. It now does.
7074 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7075 with a valid header line field name (a series of printing characters
7076 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7078 23. Changed "disc" in the source to "disk" to conform to the documentation and
7079 the book and for uniformity.
7081 24. Ignore Sendmail's -Ooption=value command line item.
7083 25. When execve() failed while trying to run a command in a pipe transport,
7084 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7085 could be confused with a return value of 69 from the command itself. This
7086 has been changed to 127, the value the shell returns if it is asked to run
7087 a non-existent command. The wording for the related log line suggests a
7088 non-existent command as the problem.
7090 26. If received_header_text expands to an empty string, do not add a Received:
7091 header line to the message. (Well, it adds a token one on the spool, but
7092 marks it "old" so that it doesn't get used or transmitted.)
7094 27. Installed eximstats 1.28 (addition of -nt option).
7096 28. There was no check for failure on the call to getsockname() in the daemon
7097 code. This can fail if there is a shortage of resources on the system, with
7098 ENOMEM, for example. A temporary error is now given on failure.
7100 29. Contrary to the C standard, it seems that in some environments, the
7101 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7102 program. Exim now does this explicitly; it affects the formatting of
7103 timestamps using strftime().
7105 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7106 complaints. I've now initialized all the variables, to avoid this.
7108 32. Header lines added by a system filter were not being "seen" during
7109 transport-time rewrites.
7111 33. The info_callback() function passed to OpenSSL is set up with type void
7112 (*)(SSL *, int, int), as described somewhere. However, when calling the
7113 function (actually a macro) that sets it up, the type void(*)() is
7114 expected. I've put in a cast to prevent warnings from picky compilers.
7116 34. If a DNS black list lookup found a CNAME record, but there were no A
7117 records associated with the domain it pointed at, Exim crashed.
7119 35. If a DNS black list lookup returned more than one A record, Exim ignored
7120 all but the first. It now scans all returned addresses if a particular IP
7121 value is being sought. In this situation, the contents of the
7122 $dnslist_value variable are a list of all the addresses, separated by a
7125 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7126 to accept a host name and all its aliases if the forward lookup for any of
7127 them yielded the IP address of the incoming connection. Now it accepts only
7128 those names whose forward lookup yields the correct IP address. Any other
7129 names are discarded. This closes a loophole whereby a rogue DNS
7130 administrator could create reverse DNS records to break through a
7131 wildcarded host restriction in an ACL.
7133 37. If a user filter or a system filter that ran in a subprocess used any of
7134 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7135 the wrong values were passed to the pipe command ($thisaddress had the
7136 value of $0, $0 had the value of $1, etc). This bug was introduced by
7137 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7139 38. Improved the line breaking for long SMTP error messages from ACLs.
7140 Previously, if there was no break point between 40 and 75 characters, Exim
7141 left the rest of the message alone. Two changes have been made: (a) I've
7142 reduced the minimum length to 35 characters; (b) if it can't find a break
7143 point between 35 and 75 characters, it looks ahead and uses the first one
7144 that it finds. This may give the occasional overlong line, but at least the
7145 remaining text gets split now.
7147 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7148 file descriptors might be low, and that setting 1000 would always raise it.
7149 It turns out that in some environments, the limit is already over 1000 and
7150 that lowering it causes trouble. So now Exim takes care not to decrease it.
7152 40. When delivering a message, the value of $return_path is set to $sender_
7153 address at the start of routing (routers may change the value). By an
7154 oversight, this default was not being set up when an address was tested by
7155 -bt or -bv, which affected the outcome if any router or filter referred to
7158 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7159 log only when "message" or "log_message" are set. However, if one of the
7160 conditions was an address verification, or a call to a nested ACL, the
7161 messages generated by the underlying test were being passed through. This
7162 no longer happens. The underlying message is available in $acl_verify_
7163 message for both "message" and "log_message" expansions, so it can be
7164 passed through if needed.
7166 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7167 new expansion $bh_ to give the encoded byte string without charset
7168 translation. Translation happens only if iconv() is available; HAVE_ICONV
7169 indicates this at build time. HEADERS_CHARSET gives the charset to
7170 translate to; headers_charset can change it in the configuration, and
7171 "headers charset" can change it in an individual filter file.
7173 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7174 that creates RFC 2047 encoded "words" labels them as that charset instead
7175 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7176 expansion operator; (ii) when Exim creates a From: line for a local
7177 message; (iii) when a header line is rewritten to include a "phrase" part.
7179 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7180 buggy, causing it to skip the first lines of messages whose message ID
7181 ended in 'D'. This would not have bitten before Exim release 4.14, because
7182 message IDs were unlikely to end in 'D' before then. The effect was to have
7183 incorrect size information for certain domains.
7185 45. #include "config.h" was missing at the start of the crypt16.c module. This
7186 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7189 46. If there was a timeout during a "random" callout check, Exim treated it as
7190 a failure of the random address, and carried on sending RSET and the real
7191 address. If the delay was just some slowness somewhere, the response to the
7192 original RCPT would be taken as a response to RSET and so on, causing
7193 mayhem of various kinds.
7195 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7196 when I implemented it. It didn't allow for the fact that some option values
7197 may legitimately be negative (e.g. size_addition), and it didn't even do
7198 the right test for positive values.
7200 48. Domain names in DNS records are case-independent. Exim always looks them up
7201 in lower case. Some resolvers return domain names in exactly the case they
7202 appear in the zone file, that is, they may contain uppercase letters. Not
7203 all resolvers do this - some return always lower case. Exim was treating a
7204 change of case by a resolver as a change of domain, similar to a widening
7205 of a domain abbreviation. This triggered its re-routing code and so it was
7206 trying to route what was effectively the same domain again. This normally
7207 caused routing to fail (because the router wouldn't handle the domain
7208 twice). Now Exim checks for this case specially, and just changes the
7209 casing of the domain that it ultimately uses when it transmits the message
7212 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7215 50. If a filter generated a file delivery with a non-absolute name (possible if
7216 no home directory exists for the router), the forbid_file option was not
7219 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7220 the existing equality matching.
7222 52. Exim was using ints instead of ino_t variables in some places where it was
7223 dealing with inode numbers.
7225 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7226 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7227 called TMPDIR, and if it finds it is different, it changes its value.
7229 54. The smtp_printf() function is now made available to local_scan() so
7230 additional output lines can be written before returning. There is also an
7231 smtp_fflush() function to enable the detection of a dropped connection.
7232 The variables smtp_input and smtp_batched_input are exported to
7235 55. Changed the default runtime configuration: the message "Unknown user"
7236 has been removed from the ACL, and instead placed on the localuser router,
7237 using the cannot_route_message feature. This means that any verification
7238 failures that generate their own messages won't get overridden. Similarly,
7239 the "Unrouteable address" message that was in the ACL for unverifiable
7240 relay addresses has also been removed.
7242 56. Added hosts_avoid_esmtp to the smtp transport.
7244 57. The exicyclog script was not checking for the esoteric option
7245 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7246 will work only if exicyclog is run under the appropriate euid.
7248 58. Following a discussion on the list, the rules by which Exim recognises line
7249 endings on incoming messages have been changed. The -dropcr and drop_cr
7250 options are now no-ops, retained only for backwards compatibility. The
7251 following line terminators are recognized: LF CRLF CR. However, special
7252 processing applies to CR:
7254 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7255 nor a local message in the state where . is a terminator.
7257 (ii) If a bare CR is encountered in a header line, an extra space is added
7258 after the line terminator so as not to end the header. The reasoning
7259 behind this is that bare CRs in header lines are most likely either
7260 to be mistakes, or people trying to play silly games.
7262 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7263 was being incorrectly given as 18 bytes larger than it should have been.
7264 This is a VOB (very old bug).
7266 60. This may never have affected anything current, but just in case it has:
7267 When the local host is found other than at the start of a list of hosts,
7268 the local host, those with the same MX, and any that follow, are discarded.
7269 When the list in question was part of a longer list of hosts, the following
7270 hosts (not currently being processed) were also being discarded. This no
7271 longer happens. I'm not sure if this situation could ever has previously
7274 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7277 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7278 header. This is something that is recommended in a new Internet Draft, and
7279 is something that is documented as being done by Sendmail. There are two
7280 possible values. For messages generated by the autoreply transport, Exim
7283 Auto-Submitted: auto-replied
7285 whereas for all other generated messages (e.g. bounces) it adds
7287 Auto-Submitted: auto-generated
7289 63. The "personal" condition in filters now includes a test for the
7290 Auto-Submitted: header. If it contains the string "auto-" the message it
7291 not considered personal.
7293 64. Added rcpt_include_affixes as a generic transport option.
7295 65. Added queue_only_override (default true).
7297 66. Added the syslog_duplication option.
7299 67. If what should have been the first header line of a message consisted of
7300 a space followed by a colon, Exim was mis-interpreting it as a header line.
7301 It isn't of course - it is syntactically invalid and should therefore be
7302 treated as the start of the message body. The misbehaviour could have
7303 caused a number of strange effects, including loss of data in subsequent
7304 header lines, and spool format errors.
7306 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7307 client host had authenticated. This control can now be exercised by an ACL
7308 for more flexibility.
7310 69. By default, callouts do not happen when testing with -bh. There is now a
7311 variant, -bhc, which does actually run the callout code, including
7312 consulting and updating the callout cache.
7314 70. Added support for saslauthd authentication, courtesy of Alexander
7317 71. If statvfs() failed on the spool or log directories while checking their
7318 size for availability, Exim confusingly gave the error "space shortage".
7319 Furthermore, in debugging mode it crashed with a floating point exception.
7320 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7321 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7322 serious problem, Exim now writes to the main and panic logs when this
7323 happens, with details of the failure. It then refuses to accept the
7324 incoming message, giving the message "spool directory problem" or "log
7325 directory problem" with a 421 code for SMTP messages.
7327 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7328 0, 1, and 2 exist, because some OS complain for execs without them (see
7329 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7330 descriptors. However, the code omitted to check that the open succeeded,
7331 causing mysterious errors if for some reason the permissions on /dev/null
7332 got screwed. Now Exim writes a message to the main and panic logs, and
7333 bombs out if it can't open /dev/null.
7335 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7336 interact so that it is all more flexible. It is supposed to remain
7337 backwards compatible. Also added extra_local_interfaces.
7339 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7340 to bomb out with an assertion failure - to the client this appears as a
7341 connection drop. This problem occurs in the part of the code that was taken
7342 from the Samba project. Fortunately, the assertion is in a very simple
7343 function, so I have fixed this by reproducing the function inline in the
7344 one place where it is called, and arranging for authentication to fail
7345 instead of killing the process with assert().
7347 75. The SPA client code was not working when the server requested OEM rather
7348 than Unicode encoding.
7350 76. Added code to make require_files with a specific uid setting more usable in
7351 the case where statting the file as root fails - usually a non-root-mounted
7352 NFS file system. When this happens and the failure is EACCES, Exim now
7353 forks a subprocess and does the per-uid checking as the relevant uid.
7355 77. Added process_log_path.
7357 78. If log_file_path was not explicitly set, a setting of check_log_space or
7358 check_log_inodes was ignored.
7360 79. If a space check for the spool or log partitions fails, the incident is now
7361 logged. Of course, in the latter case the data may get lost...
7363 80. Added the %p formatting code to string_format() so that it can be used to
7364 print addresses in debug_print(). Adjusted all the address printing in the
7365 debugging in store.c to use %p rather than %d.
7367 81. There was a concern that a line of code in smtp_in.c could overflow a
7368 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7369 initially expressed, the concern was not well-founded, because trailing
7370 spaces are removed early. However, if the trailing spaces were followed by
7371 a NULL, they did not get removed, so the overflow was possible. Two fixes
7374 (a) I re-wrote the offending code in a cleaner fashion.
7375 (b) If an incoming SMTP command contains a NULL character, it is rejected
7378 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7379 runs initgroups(), so that if the Exim user is in any additional groups,
7380 they will be used during message reception.
7386 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob