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/01 OpenSSL: With debug enabled output keying information sufficient, server
12 side, to decode a TLS 1.3 packet capture.
14 JH/02 OpenSSL: suppress the sending of (stateful) TLS1.3 session tickets.
15 Previously the default library behaviour applied, sending two, each in
18 JH/03 Debug output for ACL now gives the config file name and line number for
25 JH/01 Remove code calling the customisable local_scan function, unless a new
26 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
28 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
29 non-signal-safe functions being used.
31 JH/03 Bug 2269: When presented with a received message having a stupidly large
32 number of DKIM-Signature headers, disable DKIM verification to avoid
33 a resource-consumption attack. The limit is set at twenty.
35 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
36 report of oldest_pass in ${authres } in consequence, and separate out
37 some descriptions of reasons for verification fail.
39 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
40 files in the spool were present and unlocked. A queue-runner could spot
41 them, resulting in a duplicate delivery. Fix that by doing the unlock
42 after the unlink. Investigation by Tim Stewart. Take the opportunity to
43 add more error-checking on spoolfile handling while that code is being
46 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
47 No known attacks, no CVE, this is defensive hardening.
49 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
50 a queue-runner could start a delivery while other operations were ongoing.
51 Cutthrough delivery was a common victim, resulting in duplicate delivery.
52 Found and investigated by Tim Stewart. Fix by using the open message data
53 file handle rather than opening another, and not locally closing it (which
54 releases a lock) for that case, while creating the temporary .eml format
55 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
57 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
58 $sender_verify_failure/$recipient_verify_failure to "random".
60 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
63 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
64 Previously this would segfault.
66 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
69 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
70 like zero, since the resolver should be doing this for us, But we need one
71 as a CNAME but no MX presence gets the CNAME returned; we need to check
72 that doesn't point to an MX to declare it "no MX returned" rather than
73 "error, loop". A new main option is added so the older capability of
74 following some limited number of chain links is maintained.
76 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
78 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
79 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
80 now-deprecated earlier definitions used only specified the range up to TLS
81 1.2 (in the older-version library docs).
83 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
85 JH/15 Rework TLS client-side context management. Stop using a global, and
86 explicitly pass a context around. This enables future use of TLS for
87 connections to service-daemons (eg. malware scanning) while a client smtp
88 connection is using TLS; with cutthrough connections this is quite likely.
90 JH/16 Fix ARC verification to do AS checks in reverse order.
92 JH/17 Support a "tls" option on the ${readsocket } expansion item.
94 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
95 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
96 Previously the "utf8" would be re-prepended for every additional message.
98 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
99 Previously thery were accepted, resulting in issues when attempting to
100 forward messages to a non-supporting MTA.
102 PP/02 Let -n work with printing macros too, not just options.
104 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
105 one parent address was copied, and bogus data was used at delivery-logging
106 time. Either a crash (after delivery) or bogus log data could result.
107 Discovery and analysis by Tim Stewart.
109 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
110 Previously if the string ended mid-character, we did not insert the
111 promised '?' replacement.
113 PP/04 Documentation: current string operators work on bytes, not codepoints.
115 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
116 should pack well giving a smaller memory footprint so better caching and
117 therefore performance. Group the declarations where this can't be done so
118 that the byte-sized flag variables are not interspersed among pointer
119 variables, giving a better chance of good packing by the compiler.
121 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
122 non-null, to avoid issues with sites running BATV. Previously reports were
123 sent with an empty envelope sender so looked like bounces.
125 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
126 The ignore_error flag wasn't being returned from the filter subprocess so
127 was not set for later routers. Investigation and fix by Matthias Kurz.
129 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
130 and a msg:complete for the whole, when a message is manually removed using
131 -Mrm. Developement by Matthias Kurz, hacked on by JH.
133 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
134 a "Gnu special" function, asprintf() in the DB utility binary builds; I
135 hope that is portable enough.
137 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
138 requiring a known-CA anchor certificate; make it now rely entirely on the
139 TLSA as an anchor. Checking the name on the leaf cert against the name
140 on the A-record for the host is still done for TA (but not for EE mode).
142 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
143 included in delivery lines for non-proxied connections, when compiled with
144 SUPPORT_SOCKS and running with proxy logging enabled.
146 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
147 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
148 move the existing event to fire before the normal logging of message
149 failure so that custom logging is bracketed by normal logging.
151 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
152 msg:fail:internal event. Developement by Matthias Kurz.
154 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
155 far too small for todays use of crypto signatures stored there. Go all
156 the way to the max DNS message size of 64kB, even though this might be
157 overmuch for IOT constrained device use.
159 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
160 copy a string over itself. The library routine is documented as not
161 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
163 JH/32 For main options check_spool_space and check_inode_space, where the
164 platform supports 64b integers, support more than the previous 2^31 kB
165 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
166 the previous G, M, k.
168 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
169 $authenticated_fail_id variable on authentication failure. Previously
172 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
173 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
174 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
175 GNUTLS_SEC_PARAM_MEDIUM.
177 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
178 side. Previously we would continue as if no SNI had been received.
180 JH/36 Harden the handling of string-lists. When a list consisted of a sole
181 "<" character, which should be a list-separator specification, we walked
182 off past the nul-terimation.
184 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
185 causes) even when the retry time is not yet met. Previously they were
186 not, meaning that when (say) an account was over-quota and temp-rejecting,
187 and multiple senders' messages were queued, only one sender would get
188 notified on each configured delay_warning cycle.
190 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they return error
191 codes indicating retry. Under TLS1.3 this becomes required.
197 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
198 When redis_servers is set to a list of > 1 element, and the Redis servers
199 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
200 case of MOVED into a DEFER case instead, thus moving the query onto the
201 next server in the list. For a cluster of N elements, all N servers must
202 be defined in redis_servers.
204 GF/02 Catch and remove uninitialized value warning in exiqsumm
205 Check for existence of @ARGV before looking at $ARGV[0]
207 JH/01 Replace the store_release() internal interface with store_newblock(),
208 which internalises the check required to safely use the old one, plus
209 the allocate and data copy operations duplicated in both (!) of the
210 extant use locations.
212 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
213 modifier. This matches the restriction on the commandline.
215 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
216 Previously only the last row was returned.
218 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
219 we assumed that tags in the header were well-formed, and parsed the
220 element content after inspecting only the first char of the tag.
221 Assumptions at that stage could crash the receive process on malformed
224 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
225 While running the DKIM ACL we operate on the Permanent memory pool so that
226 variables created with "set" persist to the DATA ACL. Also (at any time)
227 DNS lookups that fail create cache records using the Permanent pool. But
228 expansions release any allocations made on the current pool - so a dnsdb
229 lookup expansion done in the DKIM ACL releases the memory used for the
230 DNS negative-cache, and bad things result. Solution is to switch to the
231 Main pool for expansions.
232 While we're in that code, add checks on the DNS cache during store_reset,
233 active in the testsuite.
234 Problem spotted, and debugging aided, by Wolfgang Breyha.
236 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
237 When none of the hosts presented to a transport match an already-open
238 connection, close it and proceed with the list. Previously we would
239 queue the message. Spotted by Lena with Yahoo, probably involving
242 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
243 Previously a spurious "250 OK id=" response was appended to the proper
246 JH/08 The "support for" informational output now, which built with Content
247 Scanning support, has a line for the malware scanner interfaces compiled
248 in. Interface can be individually included or not at build time.
250 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
251 by the template makefile "src/EDITME". The "STREAM" support for an older
252 ClamAV interface method is removed.
254 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
255 rows affected is given instead).
257 JH/11 The runtime Berkeley DB library version is now additionally output by
258 "exim -d -bV". Previously only the compile-time version was shown.
260 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
261 SMTP connection. Previously, when one had more receipients than the
262 first, an abortive onward connection was made. Move to full support for
263 multiple onward connections in sequence, handling cutthrough connection
264 for all multi-message initiating connections.
266 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
267 routers. Previously, a multi-recipient message would fail to match the
268 onward-connection opened for the first recipient, and cause its closure.
270 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
271 a timeout on read on a GnuTLS initiating connection, resulting in the
272 initiating connection being dropped. This mattered most when the callout
273 was marked defer_ok. Fix to keep the two timeout-detection methods
276 JH/15 Relax results from ACL control request to enable cutthrough, in
277 unsupported situations, from error to silently (except under debug)
278 ignoring. This covers use with PRDR, frozen messages, queue-only and
281 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
283 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
284 metadata, resulting in a crash in free().
286 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
287 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
288 Broken also in d185889f4, with init system revamp.
290 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
291 Previously we abruptly closed the connection after reading a malware-
292 found indication; now we go on to read the "scan ok" response line,
295 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
296 ACL. Previously, a crash would result.
298 JH/19 Speed up macro lookups during configuration file read, by skipping non-
299 macro text after a replacement (previously it was only once per line) and
300 by skipping builtin macros when searching for an uppercase lead character.
302 JH/20 DANE support moved from Experimental to mainline. The Makefile control
303 for the build is renamed.
305 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
306 was allocated for every new TLS startup, meaning one per message. Fix
307 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
309 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
310 reported the original. Fix to report (as far as possible) the ACL
311 result replacing the original.
313 JH/23 Fix memory leak during multi-message connections using STARTTLS under
314 OpenSSL. Certificate information is loaded for every new TLS startup,
315 and the resources needed to be freed.
317 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
319 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
322 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
323 DATA response info to the (existing) per-recipient response info for
324 the "C=" log element. It can have useful tracking info from the
325 destination system. Patch from Simon Arlott.
327 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
328 length value. Previously this would segfault.
330 HS/02 Support Avast multiline protoocol, this allows passing flags to
331 newer versions of the scanner.
333 JH/28 Ensure that variables possibly set during message acceptance are marked
334 dead before release of memory in the daemon loop. This stops complaints
335 about them when the debug_store option is enabled. Discovered specifically
336 for sender_rate_period, but applies to a whole set of variables.
337 Do the same for the queue-runner and queue-list loops, for variables set
338 from spool message files. Do the same for the SMTP per-message loop, for
339 certain variables indirectly set in ACL operations.
341 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
342 as a multi-recipient message from a mailinglist manager). The coding had
343 an arbitrary cutoff number of characters while checking for more input;
344 enforced by writing a NUL into the buffer. This corrupted long / fast
345 input. The problem was exposed more widely when more pipelineing of SMTP
346 responses was introduced, and one Exim system was feeding another.
347 The symptom is log complaints of SMTP syntax error (NUL chars) on the
348 receiving system, and refused recipients seen by the sending system
349 (propating to people being dropped from mailing lists).
350 Discovered and pinpointed by David Carter.
352 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
353 replaced by the ${authresults } expansion.
355 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
357 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
358 allows proper process termination in container environments.
360 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
361 Previously the "final dot" had a newline after it; ensure it is CR,LF.
363 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
364 and "err_perm", deprecated since 4.83 when the RFC-defined words
365 "temperror" and "permerror" were introduced.
367 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
368 transport-filters or DKIM-signing. The restriction was lost in the
369 consolidation of verify-callout and delivery SMTP handling.
370 Extend the restriction to also cover ARC-signing.
372 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
373 in defer=pass mode supply a 450 to the initiator. Previously the message
376 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
377 tls_require_ciphers is used as before.
379 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
380 "pass_unscanned". Only tmpfails from the scanner are written to
381 the paniclog, as they may require admin intervention (permission
382 denied, license issues). Other scanner errors (like decompression
383 bombs) do not cause a paniclog entry.
385 JH/36 Fix reinitialisation of DKIM logging variable between messages.
386 Previously it was possible to log spurious information in receive log
389 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
390 triggered odd behaviour from Outlook Express clients.
392 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
395 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
396 since the IETF WG has not yet settled on that versus the original
397 "bare" representation.
399 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
400 Previously the millisecond value corrupted the output.
401 Fix also for syslog_pid=no and log_selector +pid, for which the pid
402 corrupted the output.
408 JH/01 Rework error string handling in TLS interface so that the caller in
409 more cases is responsible for logging. This permits library-sourced
410 string to be attached to addresses during delivery, and collapses
411 pairs of long lines into single ones.
413 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
414 during configuration. Wildcards are allowed and expanded.
416 JH/02 Rework error string handling in DKIM to pass more info back to callers.
417 This permits better logging.
419 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
420 do not close it down and have the child transport start it up again on
421 the passed-on TCP connection. Instead, proxy the child (and any
422 subsequent ones) for TLS via a unix-domain socket channel. Logging is
423 affected: the continued delivery log lines do not have any DNSSEC, TLS
424 Certificate or OCSP information. TLS cipher information is still logged.
426 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
427 identical IP addresses on different listening ports. Will also affect
430 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
431 add noisy ifdef guards to special-case this sillyness.
432 Patch from Bernd Kuhls.
434 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
435 than 255 are no longer allowed.
437 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
438 Disable the session-cache too, which might reduce our load. Since we
439 currrectly use a new context for every connection, both as server and
440 client, there is no benefit for these.
441 GnuTLS appears to not support tickets server-side by default (we don't
442 call gnutls_session_ticket_enable_server()) but client side is enabled
443 by default on recent versions (3.1.3 +) unless the PFS priority string
446 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
447 <https://reproducible-builds.org/specs/source-date-epoch/>.
449 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
450 the check for any unsuccessful recipients did not notice the limit, and
451 erroneously found still-pending ones.
453 JH/08 Pipeline CHUNKING command and data together, on kernels that support
454 MSG_MORE. Only in-clear (not on TLS connections).
456 JH/09 Avoid using a temporary file during transport using dkim. Unless a
457 transport-filter is involved we can buffer the headers in memory for
458 creating the signature, and read the spool data file once for the
459 signature and again for transmission.
461 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
462 4.77 as the kernel support then wasn't solid, having issues in 64bit
463 mode. Now, it's been long enough. Add support for FreeBSD also.
465 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
466 case where the routing stage had gathered several addresses to send to
467 a host before calling the transport for the first, we previously failed
468 to close down TLS in the old transport process before passing the TCP
469 connection to the new process. The new one sent a STARTTLS command
470 which naturally failed, giving a failed delivery and bloating the retry
471 database. Investigation and fix prototype from Wolfgang Breyha.
473 JH/12 Fix check on SMTP command input synchronisation. Previously there were
474 false-negatives in the check that the sender had not preempted a response
475 or prompt from Exim (running as a server), due to that code's lack of
476 awareness of the SMTP input buffering.
478 PP/04 Add commandline_checks_require_admin option.
479 Exim drops privileges sanely, various checks such as -be aren't a
480 security problem, as long as you trust local users with access to their
481 own account. When invoked by services which pass untrusted data to
482 Exim, this might be an issue. Set this option in main configuration
483 AND make fixes to the calling application, such as using `--` to stop
486 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
487 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
488 responses to those, into a single TLS record each way (this usually means
489 a single packet). As a side issue, smtp_enforce_sync now works on TLS
492 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
493 affects you only if you're dancing at the edge of the param size limits.
494 If you are, and this message makes sense to you, then: raise the
495 configured limit or use OpenSSL 1.1. Nothing we can do for older
498 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
499 cmdline element to get the documented default one. Previously it was
502 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
503 are unsuable for non-message-specific reasons - eg. connection timeout,
504 banner-time rejection.
506 JH/16 Fix logging of delivery remote port, when specified by router, under
509 PP/06 Repair manualroute's ability to take options in any order, even if one
510 is the name of a transport.
513 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
515 JH/17 Change the list-building routines interface to use the expanding-string
516 triplet model, for better allocation and copying behaviour.
518 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
519 Previously it was constructed the first time a possibly-matching string
520 was met in the configuration file input during startup; now it is done
523 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
524 compatible one, to avoid the (poorly documented) possibility of a config
525 file in the working directory redirecting the DB files, possibly correpting
526 some existing file. CVE-2017-10140 assigned for BDB.
528 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
529 cache-hot. Previously, although the result was properly cached, the
530 initial verify call returned a defer.
532 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
533 the main verify for receipient in uncached-mode.
535 JH/22 Retire historical build files to an "unsupported" subdir. These are
536 defined as "ones for which we have no current evidence of testing".
538 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
539 if present. Previously it was ignored.
541 JH/24 Start using specified-initialisers in C structure init coding. This is
542 a C99 feature (it's 2017, so now considered safe).
544 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
545 if was a fixed-sized field and bitmask ops via macros; it is now more
548 PP/07 GitHub PR 56: Apply MariaDB build fix.
549 Patch provided by Jaroslav Škarvada.
551 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
552 during Coverity cleanups [4.87 JH/47]
553 Diagnosis and fix provided by Michael Fischer v. Mollard.
555 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
556 the right size to place the terminating semicolon on its own folded
557 line, the header hash was calculated to an incorrect value thanks to
558 the (relaxed) space the fold became.
560 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
561 and confused the parent.
563 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
564 which could crash as a result. This could lead to undeliverable messages.
566 JH/28 Logging: "next input sent too soon" now shows where input was truncated
569 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
570 matters on fast-turnover and PID-randomising systems, which were getting
571 out-of-order delivery.
573 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
574 a possibly-overlapping copy. The symptom was that "Remote host closed
575 connection in response to HELO" was logged instead of the actual 4xx
578 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
579 Previously only that bufferd was discarded, resulting in SYMTP command
582 JH/32 DKIM: when a message has multiple signatures matching an identity given
583 in dkim_verify_signers, run the dkim acl once for each. Previously only
584 one run was done. Bug 2189.
586 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
587 "panic the current process" to "deliberately defer". The panic log is
588 still written with the problem list name; the mail and reject logs now
589 get a temp-reject line for the message that was being handled, saying
590 something like "domains check lookup or other defer". The SMTP 451
591 message is still "Temporary local problem".
593 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
594 A crafted sequence of BDAT commands could result in in-use memory beeing
595 freed. CVE-2017-16943.
597 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
598 from SMTP input. Previously it was always done; now only done for DATA
599 and not BDAT commands. CVE-2017-16944.
601 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
602 to the message (such as an overlong header line). Previously this was
603 not done and we did not exit BDAT mode. Followon from the previous item
604 though a different problem.
610 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
611 than -2003 did; needs libidn2 in addition to libidn.
613 JH/02 The path option on a pipe transport is now expanded before use.
615 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
616 Patch provided by "Björn", documentation fix added too.
618 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
619 missing a wire-to-host endian conversion.
621 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
622 close after a BDAT command line could be taken as a following command,
623 giving a synch failure. Fix by only checking for synch immediately
624 before acknowledging the chunk.
626 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
627 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
628 macro. Patches provided by Josh Soref.
630 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
631 Previously we did not; the RFC seems ambiguous and VRFY is not listed
632 by IANA as a service extension. However, John Klensin suggests that we
635 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
636 the dkim code may be unix-mode line endings rather than smtp wire-format
637 CRLF, so prepend a CR to any bare LF.
639 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
640 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
642 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
643 the first were themselves being wrongly included in the feed into dkim
644 processing; with most chunk sizes in use this resulted in an incorrect
645 body hash calculated value.
647 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
648 DKIM signature block, for verification. Although advised against by
649 standards it is specifically not ruled illegal.
651 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
653 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
654 missing a body hash (the bh= tag).
656 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
657 It seems that HAProxy sends the Proxy Protocol information in clear and
658 only then does a TLS startup, so do the same.
660 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
661 TCP connections (such as for Spamd) unless the daemon successfully set
662 Fast Open mode on its listening sockets. This fixes breakage seen on
663 too-old kernels or those not configured for Fast Open, at the cost of
664 requiring both directions being enabled for TFO, and TFO never being used
665 by non-daemon-related Exim processes.
667 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
668 endings, at least on the first header line. Try to canonify any that get
669 past that check, despite the cost.
671 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
672 now limited to an arbitrary five deep, while parsing addresses with the
673 strip_excess_angle_brackets option enabled.
675 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
676 instead leave the unprompted TLS handshake in socket buffer for the
677 TLS library to consume.
679 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
681 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
683 JH/16 Drop variables when they go out of scope. Memory management drops a whole
684 region in one operation, for speed, and this leaves assigned pointers
685 dangling. Add checks run only under the testsuite which checks all
686 variables at a store-reset and panics on a dangling pointer; add code
687 explicitly nulling out all the variables discovered. Fixes one known
688 bug: a transport crash, where a dangling pointer for $sending_ip_address
689 originally assigned in a verify callout, is re-used.
691 PP/06 Drop '.' from @INC in various Perl scripts.
693 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
695 PP/08 Reduce a number of compilation warnings under clang; building with
696 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
697 should be warning-free.
699 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
701 HS/01 Fix portability problems introduced by PP/08 for platforms where
702 realloc(NULL) is not equivalent to malloc() [SunOS et al].
704 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
705 chunk. This allows us to accept broken chunked messages. We need a more
706 general solution here.
708 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
709 already-broken messages in the queue.
711 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
713 JH/19 Fix reference counting bug in routing-generated-address tracking.
719 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
720 supports it and a size is available (ie. the sending peer gave us one).
722 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
723 years of being deprecated). The replacements are the ACLs
724 acl_smtp_mime and acl_not_smtp_mime.
726 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
727 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
728 or even an in-clear connection were permitted. Now, if the host lookup
729 was dnssec and dane was requested then the host is only used if the
730 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
731 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
732 if one fails this test.
733 This means that a poorly-configured remote DNS will make it incommunicado;
734 but it protects against a DNS-interception attack on it.
736 JH/04 Bug 1810: make continued-use of an open smtp transport connection
737 non-noisy when a race steals the message being considered.
739 JH/05 If main configuration option tls_certificate is unset, generate a
740 self-signed certificate for inbound TLS connections.
742 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
743 in rewrites and routers.
745 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
746 and logged a warning sing 4.83; now they are a configuration file error.
748 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
749 (lacking @domain). Apply the same qualification processing as RCPT.
751 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
753 JH/10 Support ${sha256:} applied to a string (as well as the previous
756 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
757 a cutthrough deliver is pending, as we always want to make a connection.
758 This also avoids re-routing the message when later placing the cutthrough
759 connection after a verify cache hit.
760 Do not update it with the verify result either.
762 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
763 when routing results in more than one destination address.
765 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
766 signing (which inhibits the cutthrough capability). Previously only
767 the presence of an option was tested; now an expansion evaluating as
768 empty is permissible (obviously it should depend only on data available
769 when the cutthrough connection is made).
771 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
772 the relevant preceding SMTP command did not note the pipelining mode.
774 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
775 Previously they were not counted.
777 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
778 as one having no matching records. Previously we deferred the message
779 that needed the lookup.
781 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
782 distinguished as "(=".
784 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
785 for missing MX records. Previously it only worked for missing A records.
787 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
789 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
790 after the data-go-ahead and data-ack. Patch from Jason Betts.
792 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
793 even for a "none" policy. Patch from Tony Meyer.
795 JH/22 Fix continued use of a connection for further deliveries. If a port was
796 specified by a router, it must also match for the delivery to be
799 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
800 When one of the recipients of a message was unsuitable for the connection
801 (has no matching addresses), we lost track of needing to mark it
802 deferred. As a result mail would be lost.
804 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
806 JH/25 Decoding ACL controls is now done using a binary search; the source code
807 takes up less space and should be simpler to maintain. Merge the ACL
808 condition decode tables also, with similar effect.
810 JH/26 Fix problem with one_time used on a redirect router which returned the
811 parent address unchanged. A retry would see the parent address marked as
812 delivered, so not attempt the (identical) child. As a result mail would
815 JH/27 Fix a possible security hole, wherein a process operating with the Exim
816 UID can gain a root shell. Credit to http://www.halfdog.net/ for
817 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
820 JH/28 Enable {spool,log} filesystem space and inode checks as default.
821 Main config options check_{log,spool}_{inodes,space} are now
822 100 inodes, 10MB unless set otherwise in the configuration.
824 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
825 Previously it only applied to the main-section connection policy
828 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
830 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
831 by me. Added RFC7919 DH primes as an alternative.
833 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
834 are not in the system include path.
836 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
837 GnuTLS, when a session startup failed (eg because the client disconnected)
838 Exim did stdio operations after fclose. This was exposed by a recent
839 change which nulled out the file handle after the fclose.
841 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
842 signed directly by the cert-signing cert, rather than an intermediate
843 OCSP-signing cert. This is the model used by LetsEncrypt.
845 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
847 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
848 an incoming connection.
850 HS/02 Bug 1802: Do not half-close the connection after sending a request
853 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
854 fallback to "prime256v1".
856 JH/34 SECURITY: Use proper copy of DATA command in error message.
857 Could leak key material. Remotely exploitable. CVE-2016-9963.
863 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
864 and 3.4.4 - once the server is enabled to respond to an OCSP request
865 it does even when not requested, resulting in a stapling non-aware
866 client dropping the TLS connection.
868 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
869 support variable-length bit vectors. No functional change.
871 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
872 The I= interface field on outgoing lines is now after the H= remote
873 host field, same as incoming lines. There is a separate
874 outgoing_interface log selector which allows you to disable the
877 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
878 If not running log_selector +smtp_connection the mainlog would be held
879 open indefinitely after a "too many connections" event, including to a
880 deleted file after a log rotate. Leave the per net connection logging
881 leaving it open for efficiency as that will be quickly detected by the
882 check on the next write.
884 HS/01 Bug 1671: Fix post transport crash.
885 Processing the wait-<transport> messages could crash the delivery
886 process if the message IDs didn't exist for some reason. When
887 using 'split_spool_directory=yes' the construction of the spool
888 file name failed already, exposing the same netto behaviour.
890 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
891 mime_regex ACL conditions.
893 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
894 to DSN fail messages (bounces): remote IP, remote greeting, remote response
895 to HELO, local diagnostic string.
897 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
898 log line to debug. Even when configured with a tls authenticator many
899 client connections are expected to not authenticate in this way, so
900 an authenticate fail is not an error.
902 HS/02 Add the Exim version string to the process info. This way exiwhat
903 gives some more detail about the running daemon.
905 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
906 matter for fast-change records such as DNSBLs.
908 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
909 retry record, even if constant. There may be multiple transports with
910 different interface settings and the retry behaviour needs to be kept
913 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
915 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
917 JH/10 Bug 840: fix log_defer_output option of pipe transport
919 JH/11 Bug 830: use same host for all RCPTS of a message, even under
920 hosts_randomize. This matters a lot when combined with mua_wrapper.
922 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
923 ${quote_pgsql:<string>} operator.
925 JH/13 Bug 1708: avoid misaligned access in cached lookup.
927 JH/14 Change header file name for freeradius-client. Relevant if compiling
928 with Radius support; from the Gentoo tree and checked under Fedora.
930 JH/15 Bug 1712: Introduce $prdr_requested flag variable
932 JH/16 Bug 1714: Permit an empty string as expansion result for transport
933 option transport_filter, meaning no filtering.
935 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
937 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
938 defaults to "*" (all hosts). The variable is now available when not built
939 with TLS, default unset, mainly to enable keeping the testsuite sane.
940 If a server certificate is not supplied (via tls_certificate) an error is
941 logged, and clients will find TLS connections fail on startup. Presumably
942 they will retry in-clear.
943 Packagers of Exim are strongly encouraged to create a server certificate
944 at installation time.
946 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
947 with the $config_file variable.
949 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
950 in transport context, after the attempt, and per-recipient. The latter type
951 is per host attempted. The event data is the error message, and the errno
952 information encodes the lookup type (A vs. MX) used for the (first) host,
953 and the trailing two digits of the smtp 4xx response.
955 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
956 to write to mainlog (or rejectlog, paniclog) in the window between file
957 creation and permissions/ownership being changed. Particularly affects
958 installations where exicyclog is run as root, rather than exim user;
959 result is that the running daemon panics and dies.
961 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
963 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
964 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
965 "pri" and "weight". Note that the previous implicit priority given by the
966 list order is no longer honoured.
968 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
971 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
972 by defining SUPPORT_SOCKS.
974 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
975 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
976 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
977 variables are renamed to proxy_{local,external}_{address,port}.
979 JH/27 Move Internationalisation support from Experimental to mainline, enabled
980 for a build by defining SUPPORT_I18N
982 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
983 of the query string, and make ${quote_redis:} do that quoting.
985 JH/29 Move Events support from Experimental to mainline, enabled by default
986 and removable for a build by defining DISABLE_EVENT.
988 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
990 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
991 cached by the daemon.
993 JH/32 Move Redis support from Experimental to mainline, enabled for a build
994 by defining LOOKUP_REDIS. The libhiredis library is required.
996 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
997 keys are given for lookup.
999 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1000 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1001 only supported when built with TLS support. The PolarSSL SHA routines
1002 are still used when the TLS library is too old for convenient support.
1004 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1005 openssl_options), for security. OpenSSL forces this from version 1.1.0
1006 server-side so match that on older versions.
1008 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1009 allocation for $value could be released as the expansion processing
1010 concluded, but leaving the global pointer active for it.
1012 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1013 and to use the domains and local_parts ACL conditions.
1015 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1016 incorrectly not doubled on cutthrough transmission, hence seen as a
1017 body-termination at the receiving system - resulting in truncated mails.
1018 Commonly the sender saw a TCP-level error, and retransmitted the message
1019 via the normal store-and-forward channel. This could result in duplicates
1020 received - but deduplicating mailstores were liable to retain only the
1021 initial truncated version.
1023 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1025 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1027 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1028 we're in there, support oversigning also; bug 1309.
1030 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1032 HS/04 Add support for keep_environment and add_environment options.
1034 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1035 either intentional arithmetic overflow during PRNG, or testing config-
1038 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1039 delivery resulted in actual delivery. Cancel cutthrough before DATA
1042 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1043 rejects a recipient: pass the reject to the originator.
1045 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1046 Many were false-positives and ignorable, but it's worth fixing the
1049 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1050 for the new environment-manipulation done at startup. Move the routines
1051 from being local to tls.c to being global via the os.c file.
1053 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1054 an extract embedded as result-arg for a map, the first arg for extract
1055 is unavailable so we cannot tell if this is a numbered or keyed
1056 extraction. Accept either.
1062 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1065 JH/02 The smtp transport option "multi_domain" is now expanded.
1067 JH/03 The smtp transport now requests PRDR by default, if the server offers
1070 JH/04 Certificate name checking on server certificates, when exim is a client,
1071 is now done by default. The transport option tls_verify_cert_hostnames
1072 can be used to disable this per-host. The build option
1073 EXPERIMENTAL_CERTNAMES is withdrawn.
1075 JH/05 The value of the tls_verify_certificates smtp transport and main options
1076 default to the word "system" to access the system default CA bundle.
1077 For GnuTLS, only version 3.0.20 or later.
1079 JH/06 Verification of the server certificate for a TLS connection is now tried
1080 (but not required) by default. The verification status is now logged by
1081 default, for both outbound TLS and client-certificate supplying inbound
1084 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1087 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1088 Status Notification (bounce) messages are now MIME format per RFC 3464.
1089 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1090 under the control of the dsn_advertise_hosts option, and routers may
1091 have a dsn_lasthop option.
1093 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1094 default, modifiable by a malware= option. The list separator for
1095 the options can now be changed in the usual way. Bug 68.
1097 JH/10 The smtp_receive_timeout main option is now expanded before use.
1099 JH/11 The incoming_interface log option now also enables logging of the
1100 local interface on delivery outgoing connections.
1102 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1103 if the interface and destination host and port all match.
1105 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1108 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1109 Patch from Andrew Lewis.
1111 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1112 now supports optional time-restrictions, weighting, and priority
1113 modifiers per server. Patch originally by <rommer@active.by>.
1115 JH/16 The spamd_address main option now supports a mixed list of local
1116 and remote servers. Remote servers can be IPv6 addresses, and
1117 specify a port-range.
1119 JH/17 Bug 68: The spamd_address main option now supports an optional
1120 timeout value per server.
1122 JH/18 Bug 1581: Router and transport options headers_add/remove can
1123 now have the list separator specified.
1125 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1128 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1131 JH/21 Support for the A6 type of dns record is withdrawn.
1133 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1134 rather than the verbs used.
1136 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1137 from 255 to 1024 chars.
1139 JH/24 Verification callouts now attempt to use TLS by default.
1141 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1142 are generic router options now. The defaults didn't change.
1144 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1145 Original patch from Alexander Shikoff, worked over by JH.
1147 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1148 files if ZCAT_COMMAND is not executable.
1150 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1152 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1154 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1155 Normally benign, it bites when the pair was led to by a CNAME;
1156 modern usage is to not canonicalize the domain to a CNAME target
1157 (and we were inconsistent anyway for A-only vs AAAA+A).
1159 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1161 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1162 when evaluating $sender_host_dnssec.
1164 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1165 $sender_helo_dnssec variable.
1167 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1169 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1171 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1173 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1174 documented as working, but never had. Support all but $spam_report.
1176 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1177 added for tls authenticator.
1179 HS/03 Add perl_taintmode main config option
1185 TL/01 When running the test suite, the README says that variables such as
1186 no_msglog_check are global and can be placed anywhere in a specific
1187 test's script, however it was observed that placement needed to be near
1188 the beginning for it to behave that way. Changed the runtest perl
1189 script to read through the entire script once to detect and set these
1190 variables, reset to the beginning of the script, and then run through
1191 the script parsing/test process like normal.
1193 TL/02 The BSD's have an arc4random API. One of the functions to induce
1194 adding randomness was arc4random_stir(), but it has been removed in
1195 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1196 function when detected.
1198 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1199 cause callback expansion.
1201 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1202 syntax errors in an expansion can be treated as a string instead of
1203 logging or causing an error, due to the internal use of bool_lax
1204 instead of bool when processing it.
1206 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1207 server certificates when making smtp deliveries.
1209 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1211 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1213 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1215 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1216 Merged patch from Sebastian Wiedenroth.
1218 JH/05 Fix results-pipe from transport process. Several recipients, combined
1219 with certificate use, exposed issues where response data items split
1220 over buffer boundaries were not parsed properly. This eventually
1221 resulted in duplicates being sent. This issue only became common enough
1222 to notice due to the introduction of connection certificate information,
1223 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1225 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1226 size buffer was used, resulting in syntax errors when an expansion
1229 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1230 version 3.3.6 or later.
1232 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1233 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1234 both become "event_action", the variables become $event_name, $event_data
1235 and $event_defer_errno. There is a new variable $verify_mode, usable in
1236 routers, transports and related events. The tls:cert event is now also
1237 raised for inbound connections, if the main configuration event_action
1240 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1241 early OCSP support, but no stapling (appears to be less than 1.0.0).
1243 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1244 server certificate names available under the smtp transport option
1245 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1248 JH/10 Time-related extraction expansions from certificates now use the main
1249 option "timezone" setting for output formatting, and are consistent
1250 between OpenSSL and GnuTLS compilations. Bug 1541.
1252 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1253 encoded parameter in the incoming message. Bug 1558.
1255 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1256 include certificate info, eximon was claiming there were spoolfile
1259 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1261 JH/14 Log delivery-related information more consistently, using the sequence
1262 "H=<name> [<ip>]" wherever possible.
1264 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1265 are problematic for Debian distribution, omit them from the release
1268 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1270 JH/16 Fix string representation of time values on 64bit time_t architectures.
1273 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1274 output list separator was used.
1279 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1280 checkers that were complaining about end of non-void function with no
1283 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1284 This was a regression introduced in 4.83 by another bugfix.
1286 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1288 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1289 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1295 TF/01 Correctly close the server side of TLS when forking for delivery.
1297 When a message was received over SMTP with TLS, Exim failed to clear up
1298 the incoming connection properly after forking off the child process to
1299 deliver the message. In some situations the subsequent outgoing
1300 delivery connection happened to have the same fd number as the incoming
1301 connection previously had. Exim would try to use TLS and fail, logging
1302 a "Bad file descriptor" error.
1304 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1305 utilities have not been installed.
1307 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1308 temporary space as the ACL may create new global variables.
1310 TL/01 LDAP support uses per connection or global context settings, depending
1311 upon the detected version of the libraries at build time.
1313 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1314 to extract and use the src ip:port in logging and expansions as if it
1315 were a direct connection from the outside internet. PPv2 support was
1316 updated based on HAProxy spec change in May 2014.
1318 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1320 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1321 Properly escape header and check for NULL return.
1323 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1326 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1328 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1329 characters in header names, implemented as a verify condition.
1330 Contributed by Michael Fischer v. Mollard.
1332 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1333 results permerror and temperror. Previous values are deprecated but
1334 still accepted. In a future release, err_perm and err_temp will be
1335 completely removed, which will be a backward incompatibility if the
1336 ACL tests for either of these two old results. Patch contributed by
1337 user bes-internal on the mailing list.
1339 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1341 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1342 selectors, in both main and reject logs.
1344 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1347 JH/07 Add malware type "sock" for talking to simple daemon.
1349 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1351 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1352 routers/transports under cutthrough routing.
1354 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1355 numbers. Touch up "bool" conditional to keep the same definition.
1357 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1359 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1361 JH/12 Expand items in router/transport headers_add or headers_remove lists
1362 individually rather than the list as a whole. Bug 1452.
1364 Required for reasonable handling of multiple headers_ options when
1365 they may be empty; requires that headers_remove items with embedded
1366 colons must have them doubled (or the list-separator changed).
1368 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1369 view the policy declared in the DMARC record. Currently, $dmarc_status
1370 is a combined value of both the record presence and the result of the
1373 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1375 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1376 dnslookup router and the smtp transport (applying to the forward
1379 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1380 of ldap servers used for a specific lookup. Patch provided by Heiko
1383 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1384 New variable $lookup_dnssec_authenticated for observability.
1386 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1387 Patch submitted by Lars Timman.
1389 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1391 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1392 Requires trusted mode and valid format message id, aborts otherwise.
1393 Patch contributed by Heiko Schlichting.
1395 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1396 certextract with support for various fields. Bug 1358.
1398 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1399 is requested by default, modifiable by smtp transport option
1402 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1403 operate on certificate variables to give certificate fingerprints
1404 Also new ${sha256:cert_variable}.
1406 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1408 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1409 Christian Aistleitner.
1411 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1413 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1414 file. Patch from Wolfgang Breyha.
1416 JH/25 Expand the coverage of the delivery $host and $host_address to
1417 client authenticators run in verify callout. Bug 1476.
1419 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1420 align with daemon_smtp_ports. Bug 72.
1422 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1423 support and error reporting did not work properly.
1425 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1426 and is readable. Patch from Andrew Colin Kissa.
1428 TL/14 Enhance documentation of ${run expansion and how it parses the
1429 commandline after expansion, particularly in the case when an
1430 unquoted variable expansion results in an empty value.
1432 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1434 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1435 by renaming away from it. Addresses GH issue 15, reported by
1438 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1440 TL/15 SECURITY: prevent double expansion in math comparison functions
1441 (can expand unsanitized data). Not remotely exploitable.
1448 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1450 PP/02 Make -n do something, by making it not do something.
1451 When combined with -bP, the name of an option is not output.
1453 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1456 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1457 $sender_host_name and config options to manage this, and basic check
1460 PP/05 DSCP support for outbound connections and control modifier for inbound.
1462 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1463 (Only plugin which currently uses this is kerberos4, which nobody should
1464 be using, but we should make it available and other future plugins might
1465 conceivably use it, even though it would break NAT; stuff *should* be
1466 using channel bindings instead).
1468 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1469 name; added for Sendmail compatibility; requires admin caller.
1470 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1471 just ignore it); requires trusted caller.
1472 Also parse but ignore: -Ac -Am -X<logfile>
1475 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1477 TL/02 Add +smtp_confirmation as a default logging option.
1479 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1480 Patch by Magnus Holmgren from 2007-02-20.
1482 TL/04 Bugzilla 1281 - Spec typo.
1483 Bugzilla 1283 - Spec typo.
1484 Bugzilla 1290 - Spec grammar fixes.
1486 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1488 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1490 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1491 mailing list by by Dmitry Isaikin.
1493 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1495 JH/02 Support "G" suffix to numbers in ${if comparisons.
1497 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1499 NM/01 Bugzilla 1197 - Spec typo
1500 Bugzilla 1196 - Spec examples corrections
1502 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1504 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1505 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1508 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1509 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1511 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1512 "acl {{name}{arg}...}", and optional args on acl condition
1515 JH/05 Permit multiple router/transport headers_add/remove lines.
1517 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1519 JH/07 Avoid using a waiting database for a single-message-only transport.
1520 Performance patch from Paul Fisher. Bugzilla 1262.
1522 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1525 JH/09 Add $headers_added variable, with content from use of ACL modifier
1526 add_header (but not yet added to the message). Bugzilla 199.
1528 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1529 Pulled from Bugzilla 817 by Wolfgang Breyha.
1531 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1533 (nb: this is the same fix as in Exim 4.80.1)
1535 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1538 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1541 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1543 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1544 advertise SMTP AUTH mechanism to us, instead of a generic
1545 protocol violation error. Also, make Exim more robust to bad
1546 data from the Dovecot auth socket.
1548 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1550 When a queue runner is handling a message, Exim first routes the
1551 recipient addresses, during which it prunes them based on the retry
1552 hints database. After that it attempts to deliver the message to
1553 any remaining recipients. It then updates the hints database using
1556 So if a recipient address works intermittently, it can get repeatedly
1557 deferred at routing time. The retry hints record remains fresh so the
1558 address never reaches the final cutoff time.
1560 This is a fairly common occurrence when a user is bumping up against
1561 their storage quota. Exim had some logic in its local delivery code
1562 to deal with this. However it did not apply to per-recipient defers
1563 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1565 This change adds a proper retry rule check during routing so that the
1566 final cutoff time is checked against the message's age. We only do
1567 this check if there is an address retry record and there is not a
1568 domain retry record; this implies that previous attempts to handle
1569 the address had the retry_use_local_parts option turned on. We use
1570 this as an approximation for the destination being like a local
1571 delivery, as in LMTP.
1573 I suspect this new check makes the old local delivery cutoff check
1574 redundant, but I have not verified this so I left the code in place.
1576 TF/02 Correct gecos expansion when From: is a prefix of the username.
1578 Test 0254 submits a message to Exim with the header
1582 When I ran the test suite under the user fanf2, Exim expanded
1583 the header to contain my full name, whereas it should have added
1584 a Resent-Sender: header. It erroneously treats any prefix of the
1585 username as equal to the username.
1587 This change corrects that bug.
1589 GF/01 DCC debug and logging tidyup
1590 Error conditions log to paniclog rather than rejectlog.
1591 Debug lines prefixed by "DCC: " to remove any ambiguity.
1593 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1595 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1596 Bug spotted by Jeremy Harris; was flawed since initial commit.
1597 Would have resulted in OCSP responses post-SNI triggering an Exim
1598 NULL dereference and crash.
1600 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1602 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1603 Bug detection, analysis and fix by Samuel Thibault.
1604 Bugzilla 1331, Debian bug #698092.
1606 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1608 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1609 Server implementation by Todd Lyons, client by JH.
1610 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1611 config variable "prdr_enable" controls whether the server
1612 advertises the facility. If the client requests PRDR a new
1613 acl_data_smtp_prdr ACL is called once for each recipient, after
1614 the body content is received and before the acl_smtp_data ACL.
1615 The client is controlled by both of: a hosts_try_prdr option
1616 on the smtp transport, and the server advertisement.
1617 Default client logging of deliveries and rejections involving
1618 PRDR are flagged with the string "PRDR".
1620 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1621 fclose(). Diagnosis by Todd Lyons.
1623 PP/17 Update configure.default to handle IPv6 localhost better.
1624 Patch by Alain Williams (plus minor tweaks).
1627 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1628 This is now consistent with GnuTLS, and is now documented: the
1629 previous undocumented portable approach to treating the option as
1630 unset was to force an expansion failure. That still works, and
1631 an empty string is now equivalent.
1633 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1634 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1635 not performing validation itself.
1637 PP/20 Added force_command boolean option to pipe transport.
1638 Patch from Nick Koston, of cPanel Inc.
1640 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1643 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1645 PP/21 Fix eximon continuous updating with timestamped log-files.
1646 Broken in a format-string cleanup in 4.80, missed when I repaired the
1647 other false fix of the same issue.
1648 Report and fix from Heiko Schlichting.
1651 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1652 Report from Prashanth Katuri.
1654 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1655 It's SecureTransport, so affects any MacOS clients which use the
1656 system-integrated TLS libraries, including email clients.
1658 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1659 using a MIME ACL for non-SMTP local injection.
1660 Report and assistance in diagnosis by Warren Baker.
1662 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1664 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1666 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1667 last id that failed so it may be referenced in subsequent ACL's.
1669 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1672 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1673 ldap library initialization, allowing self-signed CA's to be
1674 used. Also properly sets require_cert option later in code by
1675 using NULL (global ldap config) instead of ldap handle (per
1676 session). Bug diagnosis and testing by alxgomz.
1678 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1679 the src/util/ subdirectory.
1681 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1682 renamed to Transport Post Delivery Action by Jeremy Harris, as
1685 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1686 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1687 redis_servers = needs to be configured which will be used by the redis
1688 lookup. Patch from Warren Baker, of The Packet Hub.
1690 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1692 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1693 hostname or reverse DNS when processing a host list. Used suggestions
1694 from multiple comments on this bug.
1696 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1698 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1699 Missed a few lines, added it to make the runtest require no keyboard
1702 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1703 contains upper case chars. Make router use caseful_local_part.
1705 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1706 support when GnuTLS has been built with p11-kit.
1712 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1714 This, or similar/improved, will also be change PP/11 of 4.82.
1720 PP/01 Handle short writes when writing local log-files.
1721 In practice, only affects FreeBSD (8 onwards).
1722 Bugzilla 1053, with thanks to Dmitry Isaikin.
1724 NM/01 Bugzilla 949 - Documentation tweak
1726 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1729 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1731 PP/02 Implemented gsasl authenticator.
1733 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1735 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1736 `pkg-config foo` for cflags/libs.
1738 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1739 with rest of GSASL and with heimdal_gssapi.
1741 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1742 `pkg-config foo` for cflags/libs for the TLS implementation.
1744 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1745 properties get this fed in as external SSF. A number of robustness
1746 and debugging improvements to the cyrus_sasl authenticator.
1748 PP/08 cyrus_sasl server now expands the server_realm option.
1750 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1751 Patch by Jeremy Harris.
1753 PP/10 Added dbmjz lookup type.
1755 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1757 PP/12 MAIL args handles TAB as well as SP, for better interop with
1758 non-compliant senders.
1759 Analysis and variant patch by Todd Lyons.
1761 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1762 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1763 Patch from Dirk Mueller <dmueller@suse.com>
1765 PP/13 tls_peerdn now print-escaped for spool files.
1766 Observed some $tls_peerdn in wild which contained \n, which resulted
1767 in spool file corruption.
1769 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1770 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1771 or write after TLS renegotiation, which otherwise led to messages
1774 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1775 as a tracking header (ie: a signed header comes before the signature).
1776 Patch from Wolfgang Breyha.
1778 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1779 comma-sep list; embedded commas doubled.
1781 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1783 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1785 Report and patch from Dmitry Banschikov.
1787 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1788 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1789 failures. We appear to now support TLS1.1+ with Exim.
1791 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1792 lets Exim select keys and certificates based upon TLS SNI from client.
1793 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1794 before an outbound SMTP session. New log_selector, +tls_sni.
1796 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1797 NULL dereference. Report and patch from Alun Jones.
1799 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1800 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1801 Not seeing resolver debug output on NetBSD, but suspect this is a
1802 resolver implementation change.
1804 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1805 Left warnings. Added "eximon gdb" invocation mode.
1807 PP/21 Defaulting "accept_8bitmime" to true, not false.
1809 PP/22 Added -bw for inetd wait mode support.
1811 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1812 locate the relevant includes and libraries. Made this the default.
1814 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1815 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1817 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1818 This may cause build issues on older platforms.
1820 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1821 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1822 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1823 Added SNI support via GnuTLS too.
1824 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1826 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1828 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1829 Applied second patch from Janne, implementing suggestion to default
1830 multiple-strings-in-record handling to match SPF spec.
1832 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1834 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1835 read-only, out of scope).
1836 Patch from Wolfgang Breyha, report from Stuart Northfield.
1838 PP/29 Fix three issues highlighted by clang analyser static analysis.
1839 Only crash-plausible issue would require the Cambridge-specific
1840 iplookup router and a misconfiguration.
1841 Report from Marcin Mirosław.
1843 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1845 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1846 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1847 As part of this, removing so much warning spew let me fix some minor
1848 real issues in debug logging.
1850 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1851 assignment on my part. Fixed.
1853 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1854 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1855 Janne Snabb (who went above and beyond: thank you).
1857 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1858 string otherwise requires a connection and a bunch more work and it's
1859 relatively easy to get wrong. Should also expose TLS library linkage
1862 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1863 64-bit ${eval} (JH/03).
1865 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1866 GNU libc to support some of the 64-bit stuff, should not lead to
1867 conflicts. Defined before os.h is pulled in, so if a given platform
1868 needs to override this, it can.
1870 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1871 protection layer was required, which is not implemented.
1872 Bugzilla 1254, patch from Wolfgang Breyha.
1874 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1875 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1876 tls_dhparam take prime identifiers. Also unbreak combination of
1877 OpenSSL+DH_params+TLSSNI.
1879 PP/39 Disable SSLv2 by default in OpenSSL support.
1885 PP/01 Solaris build fix for Oracle's LDAP libraries.
1886 Bugzilla 1109, patch from Stephen Usher.
1888 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1890 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1893 TF/02 Fix a couple more cases where we did not log the error message
1894 when unlink() failed. See also change 4.74-TF/03.
1896 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1897 lock up or crash if it happened to be inside a call to libc when it
1898 got a SIGUSR1 from exiwhat.
1900 The SIGUSR1 handler appends the current process status to the process
1901 log which is later printed by exiwhat. It used to use the general
1902 purpose logging code to do this, but several functions it calls are
1903 not safe for signals.
1905 The new output code in the SIGUSR1 handler is specific to the process
1906 log, and simple enough that it's easy to inspect for signal safety.
1907 Removing some special cases also simplifies the general logging code.
1908 Removing the spurious timestamps from the process log simplifies
1911 TF/04 Improved ratelimit ACL condition.
1913 The /noupdate option has been deprecated in favour of /readonly which
1914 has clearer semantics. The /leaky, /strict, and /readonly update modes
1915 are mutually exclusive. The update mode is no longer included in the
1916 database key; it just determines when the database is updated. (This
1917 means that when you upgrade Exim will forget old rate measurements.)
1919 Exim now checks that the per_* options are used with an update mode that
1920 makes sense for the current ACL. For example, when Exim is processing a
1921 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1922 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1923 must specify per_mail/readonly. If you omit the update mode it defaults to
1924 /leaky where that makes sense (as before) or /readonly where required.
1926 The /noupdate option is now undocumented but still supported for
1927 backwards compatibility. It is equivalent to /readonly except that in
1928 ACLs where /readonly is required you may specify /leaky/noupdate or
1929 /strict/noupdate which are treated the same as /readonly.
1931 A useful new feature is the /count= option. This is a generalization
1932 of the per_byte option, so that you can measure the throughput of other
1933 aggregate values. For example, the per_byte option is now equivalent
1934 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1936 The per_rcpt option has been generalized using the /count= mechanism
1937 (though it's more complicated than the per_byte equivalence). When it is
1938 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1939 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1940 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1941 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1942 Note that using per_rcpt with a non-readonly update mode in more than
1943 one ACL will cause the recipients to be double-counted. (The per_mail
1944 and per_byte options don't have this problem.)
1946 The handling of very low rates has changed slightly. If the computed rate
1947 is less than the event's count (usually one) then this event is the first
1948 after a long gap. In this case the rate is set to the same as this event's
1949 count, so that the first message of a spam run is counted properly.
1951 The major new feature is a mechanism for counting the rate of unique
1952 events. The new per_addr option counts the number of different
1953 recipients that someone has sent messages to in the last time period. It
1954 behaves like per_rcpt if all the recipient addresses are different, but
1955 duplicate recipient addresses do not increase the measured rate. Like
1956 the /count= option this is a general mechanism, so the per_addr option
1957 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1958 example, measure the rate that a client uses different sender addresses
1959 with the options per_mail/unique=$sender_address. There are further
1960 details in the main documentation.
1962 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1964 TF/06 Removed a few PCRE remnants.
1966 TF/07 Automatically extract Exim's version number from tags in the git
1967 repository when doing development or release builds.
1969 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1970 Bugzilla 879. Patch from Paul Fisher.
1972 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1973 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1976 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1978 PP/05 Variable $av_failed, true if the AV scanner deferred.
1979 Bugzilla 1078. Patch from John Horne.
1981 PP/06 Stop make process more reliably on build failure.
1982 Bugzilla 1087. Patch from Heiko Schlittermann.
1984 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1985 Bugzilla 1089. Patch from Heiko Schlittermann.
1987 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1988 Bugzilla 1131. Patch from Holger Weiß.
1990 PP/09 Handle IPv6 addresses with SPF.
1991 Bugzilla 860. Patch from Wolfgang Breyha.
1993 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1995 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1998 PP/11 match_* no longer expand right-hand-side by default.
1999 New compile-time build option, EXPAND_LISTMATCH_RHS.
2000 New expansion conditions, "inlist", "inlisti".
2002 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2004 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2006 PP/14 fix log_write() format string regression from TF/03.
2007 Bugzilla 1152. Patch from Dmitry Isaikin.
2013 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2015 PP/02 Harmonised TLS library version reporting; only show if debugging.
2016 Layout now matches that introduced for other libraries in 4.74 PP/03.
2018 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2020 PP/04 New "dns_use_edns0" global option.
2022 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2025 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2026 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2028 TK/01 Updated PolarSSL code to 0.14.2.
2029 Bugzilla 1097. Patch from Andreas Metzler.
2031 PP/07 Catch divide-by-zero in ${eval:...}.
2032 Fixes bugzilla 1102.
2034 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2037 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2038 format-string attack -- SECURITY: remote arbitrary code execution.
2040 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2041 time unintentionally subject to list matching rules, letting the header
2042 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2043 arbitrary string expansion). This allowed for information disclosure.
2045 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2046 INT_MIN/-1 -- value coerced to INT_MAX.
2052 NM/01 Workaround for PCRE version dependency in version reporting
2055 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2056 This fixes portability to compilers other than gcc, notably
2057 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2059 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2060 makefiles for portability to HP-UX and POSIX correctness.
2062 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2063 Also via indented variable definition in the Makefile.
2064 (Debugging by Oliver Heesakkers).
2066 PP/02 Restore caching of spamd results with expanded spamd_address.
2067 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2069 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2070 Improves build reliability. Fix from: Frank Elsner
2072 NM/02 Fix wide character breakage in the rfc2047 coding
2073 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2075 NM/03 Allow underscore in dnslist lookups
2076 Fixes bug 1026. Patch from Graeme Fowler
2078 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2079 Code patches from Adam Ciarcinski of NetBSD.
2081 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2084 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2085 is logged, to avoid truncation. Patch from John Horne.
2087 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2088 Patch from Jakob Hirsch.
2090 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2091 SQL string expansion failure details.
2092 Patch from Andrey Oktyabrski.
2094 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2095 Patch from Simon Arlott.
2097 PP/09 New lookups functionality failed to compile on old gcc which rejects
2098 extern declarations in function scope.
2099 Patch from Oliver Fleischmann
2101 PP/10 Use sig_atomic_t for flags set from signal handlers.
2102 Check getgroups() return and improve debugging.
2103 Fixed developed for diagnosis in bug 927 (which turned out to be
2106 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2107 Patch from Mark Zealey.
2109 PP/12 Bugzilla 1056: Improved spamd server selection.
2110 Patch from Mark Zealey.
2112 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2113 Based on patch from Heiko Schlittermann.
2115 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2116 Patch from Uwe Doering, sign-off by Michael Haardt.
2118 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2119 variable declaration deep within a block. Bug and patch from
2122 PP/15 lookups-Makefile IRIX compatibility coercion.
2124 PP/16 Make DISABLE_DKIM build knob functional.
2126 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2127 Patch by Simon Arlott
2129 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2130 variable argument macros. Our copy now differs from upstream.
2136 TF/01 Failure to get a lock on a hints database can have serious
2137 consequences so log it to the panic log.
2139 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2140 controlled using the smtp_confirmation log selector.
2142 TF/03 Include the error message when we fail to unlink a spool file.
2144 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2145 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2146 for maintaining out-of-tree patches for some time.
2148 PP/01 Bugzilla 139: Documentation and portability issues.
2149 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2150 Handle per-OS dynamic-module compilation flags.
2152 PP/02 Let /dev/null have normal permissions.
2153 The 4.73 fixes were a little too stringent and complained about the
2154 permissions on /dev/null. Exempt it from some checks.
2155 Reported by Andreas M. Kirchwitz.
2157 PP/03 Report version information for many libraries, including
2158 Exim version information for dynamically loaded libraries. Created
2159 version.h, now support a version extension string for distributors
2160 who patch heavily. Dynamic module ABI change.
2162 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2163 privilege escalation vulnerability whereby the Exim run-time user
2164 can cause root to append content of the attacker's choosing to
2167 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2170 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2171 If dropping privileges for untrusted macros, we disabled normal logging
2172 on the basis that it would fail; for the Exim run-time user, this is not
2173 the case, and it resulted in successful deliveries going unlogged.
2174 Fixed. Reported by Andreas Metzler.
2180 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2181 only prepend for the Resent-* case. Fixes regression introduced in
2182 Exim 4.70 by NM/22 for Bugzilla 607.
2184 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2185 increasing numbers of administrators be bitten by this.
2187 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2189 PP/03 Bugzilla 994: added openssl_options main configuration option.
2191 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2193 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2195 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2197 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2198 without a peer certificate, leading to a segfault because of an
2199 assumption that peers always have certificates. Be a little more
2200 paranoid. Problem reported by Martin Tscholak.
2202 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2203 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2204 NB: ClamAV planning to remove STREAM in "middle of 2010".
2205 CL also introduces -bmalware, various -d+acl logging additions and
2206 more caution in buffer sizes.
2208 PP/09 Implemented reverse_ip expansion operator.
2210 PP/10 Bugzilla 937: provide a "debug" ACL control.
2212 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2214 PP/12 Bugzilla 973: Implement --version.
2216 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2218 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2220 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2222 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2223 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2224 ignore trailing whitespace.
2226 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2228 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2231 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2232 Notification from Dr Andrew Aitchison.
2234 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2235 ExtendedDetectionInfo response format.
2236 Notification from John Horne.
2238 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2241 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2242 XSL and documented dependency on system catalogs, with examples of how
2245 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2248 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2249 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2250 configuration file which is writeable by the Exim user or group.
2252 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2253 of configuration files to cover files specified with the -C option if
2254 they are going to be used with root privileges, not just the default
2257 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2258 option (effectively making it always true).
2260 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2261 files to be used while preserving root privileges.
2263 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2264 that rogue child processes cannot use them.
2266 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2267 run-time user, instead of root.
2269 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2270 Exim run-time user without dropping privileges.
2272 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2273 result string, instead of calling string_vformat() twice with the same
2276 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2277 for other users. Others should always drop root privileges if they use
2278 -C on the command line, even for a whitelisted configure file.
2280 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2282 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2288 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2289 $data_path, and $header_path variables; fixed documentation bugs and
2292 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2293 exipick to access non-standard spools, including the "frozen" queue
2296 NM/01 Bugzilla 965: Support mysql stored procedures.
2297 Patch from Alain Williams
2299 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2301 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2302 Patch from Andreas Metzler
2304 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2305 Patch from Kirill Miazine
2307 NM/05 Bugzilla 671: Added umask to procmail example.
2309 JJ/03 installed exipick 20100323.0, fixing doc bug
2311 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2312 directory. Notification and patch from Dan Rosenberg.
2314 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2316 TK/02 Improve log output when DKIM signing operation fails.
2318 MH/01 Treat the transport option dkim_domain as a colon separated
2319 list, not as a single string, and sign the message with each element,
2320 omitting multiple occurences of the same signer.
2322 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2323 Bugzilla 985, 986. Patch by Simon Arlott
2325 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2326 Patch by Simon Arlott
2328 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2329 MBX locking. Notification from Dan Rosenberg.
2335 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2337 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2339 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2341 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2343 NM/04 Bugzilla 915: Flag broken perl installation during build.
2349 TK/01 Added patch by Johannes Berg that expands the main option
2350 "spamd_address" if it starts with a dollar sign.
2352 TK/02 Write list of recipients to X-Envelope-Sender header when building
2353 the mbox-format spool file for content scanning (suggested by Jakob
2356 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2357 (http://www.dcc-servers.net/) support via dccifd. Activated by
2358 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2360 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2361 by Mark Daniel Reidel <mr@df.eu>.
2363 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2364 When building exim an external PCRE library is now needed -
2365 PCRE is a system library on the majority of modern systems.
2366 See entry on PCRE_LIBS in EDITME file.
2368 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2369 conversation. Added nologin parameter to request.
2370 Patch contributed by Kirill Miazine.
2372 TF/01 Do not log submission mode rewrites if they do not change the address.
2374 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2376 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2377 log files in place. Contributed by Roberto Lima.
2379 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2381 TF/03 Bugzilla 615: When checking the local_parts router precondition
2382 after a local_part_suffix or local_part_prefix option, Exim now
2383 does not use the address's named list lookup cache, since this
2384 contains cached lookups for the whole local part.
2386 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2387 Robert Millan. Documentation is in experimental-spec.txt.
2389 TF/04 Bugzilla 668: Fix parallel build (make -j).
2391 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2393 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2394 Patch provided by Jan Srzednicki.
2396 TF/05 Leading white space used to be stripped from $spam_report which
2397 wrecked the formatting. Now it is preserved.
2399 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2400 that they are available at delivery time.
2402 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2404 TF/08 TLS error reporting now respects the incoming_interface and
2405 incoming_port log selectors.
2407 TF/09 Produce a more useful error message if an SMTP transport's hosts
2408 setting expands to an empty string.
2410 NM/06 Bugzilla 744: EXPN did not work under TLS.
2411 Patch provided by Phil Pennock.
2413 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2414 Patch provided by Richard Godbee.
2416 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2417 acl_smtp_notquit, added index entry.
2419 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2420 Patch provided by Eugene Bujak.
2422 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2423 accept(). Patch provided by Maxim Dounin.
2425 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2426 Patch provided by Phil Pennock.
2428 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2430 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2431 Patch provided by Brad "anomie" Jorsch.
2433 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2434 Patch provided by Dean Brooks.
2436 TK/05 Add native DKIM support (does not depend on external libraries).
2438 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2439 Patch provided by Graeme Fowler.
2441 NM/16 Bugzilla 851: Documentation example syntax fix.
2443 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2445 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2448 NM/19 Bugzilla 745: TLS version reporting.
2449 Patch provided by Phil Pennock.
2451 NM/20 Bugzilla 167: bool: condition support.
2452 Patch provided by Phil Pennock.
2454 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2455 clients. Patch provided by Phil Pennock.
2457 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2458 Patch provided by Brad "anomie" Jorsch.
2460 NM/23 Bugzilla 687: Fix misparses in eximstats.
2461 Patch provided by Heiko Schlittermann.
2463 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2464 Patch provided by Heiko Schlittermann.
2466 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2467 plus update to original patch.
2469 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2471 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2472 Patch provided by David Brownlee.
2474 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2476 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2478 NM/30 Bugzilla 888: TLS documentation bugfixes.
2480 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2482 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2483 Unlike the original bugzilla I have changed all shell scripts in src tree.
2485 NM/33 Bugzilla 898: Transport filter timeout fix.
2486 Patch by Todd Rinaldo.
2488 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2489 Patch by Serge Demonchaux.
2491 NM/35 Bugzilla 39: Base64 decode bug fixes.
2492 Patch by Jakob Hirsch.
2494 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2496 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2498 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2500 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2506 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2507 ALT-N's libdkim that I have put here:
2508 http://duncanthrax.net/exim-experimental/
2510 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2511 were called 'true' and it seems that C99 defines that as a reserved
2512 keyword to be used with 'bool' variable types. That means you could
2513 not include C99-style headers which use bools without triggering
2514 build errors in sieve.c.
2516 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2517 as mailq or other aliases. Changed the --help handling significantly
2518 to do whats expected. exim_usage() emits usage/help information.
2520 SC/01 Added the -bylocaldomain option to eximstats.
2522 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2524 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2526 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2532 PH/01 Another patch from the Sieve maintainer.
2534 PH/02 When an IPv6 address is converted to a string for single-key lookup
2535 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2536 dots are used instead of colons so that keys in lsearch files need not
2537 contain colons. This was done some time before quoting was made available
2538 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2539 (notated using the quote facility) so as to distinguish them from IPv4
2540 keys. This meant that lookups for IP addresses in host lists did not work
2541 for iplsearch lookups.
2543 This has been fixed by arranging for IPv6 addresses to be expressed with
2544 colons if the lookup type is iplsearch. This is not incompatible, because
2545 previously such lookups could never work.
2547 The situation is now rather anomalous, since one *can* have colons in
2548 ordinary lsearch keys. However, making the change in all cases is
2549 incompatible and would probably break a number of configurations.
2551 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2554 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2555 conversion specification without a maximum field width, thereby enabling
2556 a rogue spamd server to cause a buffer overflow. While nobody in their
2557 right mind would setup Exim to query an untrusted spamd server, an
2558 attacker that gains access to a server running spamd could potentially
2559 exploit this vulnerability to run arbitrary code as the Exim user.
2561 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2562 $primary_hostname instead of what libspf2 thinks the hosts name is.
2564 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2565 a directory entry by the name of the lookup key. Previously, if a
2566 symlink pointed to a non-existing file or a file in a directory that
2567 Exim lacked permissions to read, a lookup for a key matching that
2568 symlink would fail. Now it is enough that a matching directory entry
2569 exists, symlink or not. (Bugzilla 503.)
2571 PH/03 The body_linecount and body_zerocount variables are now exported in the
2574 PH/04 Added the $dnslist_matched variable.
2576 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2577 This means they are set thereafter only if the connection becomes
2580 PH/06 Added the client_condition to authenticators so that some can be skipped
2581 by clients under certain conditions.
2583 PH/07 The error message for a badly-placed control=no_multiline_responses left
2584 "_responses" off the end of the name.
2586 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2588 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2589 (without spaces) instead of just copying the configuration text.
2591 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2593 PH/11 Added $max_received_linelength.
2595 PH/12 Added +ignore_defer and +include_defer to host lists.
2597 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2598 way in which PCRE > 7.0 is built.
2600 PH/14 Implemented queue_only_load_latch.
2602 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2603 MAIL command. The effect was to mangle the value on 64-bit systems.
2605 PH/16 Another patch from the Sieve maintainer.
2607 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2609 PH/18 If a system quota error occurred while trying to create the file for
2610 a maildir delivery, the message "Mailbox is full" was not appended to the
2611 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2612 only to a quota excession during the actual writing of the file.
2614 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2615 characters?) which causes problems in log lines. The DN values are now
2616 passed through string_printing() before being added to log lines.
2618 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2619 and InterBase are left for another time.)
2621 PH/21 Added message_body_newlines option.
2623 PH/22 Guard against possible overflow in moan_check_errorcopy().
2625 PH/23 POSIX allows open() to be a macro; guard against that.
2627 PH/24 If the recipient of an error message contained an @ in the local part
2628 (suitably quoted, of course), incorrect values were put in $domain and
2629 $local_part during the evaluation of errors_copy.
2635 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2636 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2639 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2640 issue a MAIL command.
2642 PH/02 In an ACL statement such as
2644 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2646 if a client was not listed at all, or was listed with a value other than
2647 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2648 the condition was not true (as it should be), so access was not denied.
2649 The bug was that the ! inversion was incorrectly passed on to the second
2650 item. This has been fixed.
2652 PH/03 Added additional dnslists conditions == and =& which are different from
2653 = and & when the dns lookup returns more than one IP address.
2655 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2656 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2658 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2659 FSYNC, which compiles an option called disable_fsync that allows for
2660 bypassing fsync(). The documentation is heavily laced with warnings.
2662 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2664 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2665 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2666 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2667 including adding "make clean"; (3) Added -fPIC when compiling the test
2668 dynamically loaded module, to get rid of a warning.
2670 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2671 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2672 = 0s. The bug is otherwise harmless.
2674 PH/07 There was a bug in the dovecot authenticator such that the value of
2675 $auth1 could be overwritten, and so not correctly preserved, after a
2676 successful authentication. This usually meant that the value preserved by
2677 the server_setid option was incorrect.
2679 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2681 PH/09 Installed PCRE release 7.0.
2683 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2684 run for batched SMTP input. It is now run at the start of every message
2685 in the batch. While fixing this I discovered that the process information
2686 (output by running exiwhat) was not always getting set for -bs and -bS
2687 input. This is fixed, and it now also says "batched" for BSMTP.
2689 PH/11 Added control=no_pipelining.
2691 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2692 patch, slightly modified), and move the expansion of helo_data till after
2693 the connection is made in the smtp transport (so it can use these
2696 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2698 PH/14 Added log_selector = +pid.
2700 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2702 PH/16 Add ${if forany and ${if forall.
2704 PH/17 Added dsn_from option to vary the From: line in DSNs.
2706 PH/18 Flush SMTP output before performing a callout, unless control =
2707 no_callout_flush is set.
2709 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2710 was true (the default) a successful delivery failed to delete the retry
2711 item, thus causing premature timeout of the address. The bug is now
2714 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2716 PH/21 Long custom messages for fakedefer and fakereject are now split up
2717 into multiline responses in the same way that messages for "deny" and
2718 other ACL rejections are.
2720 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2721 with slight modification.
2723 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2724 draft, changing the syntax and factoring some duplicate code".
2726 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2727 for deliveries of the second and subsequent messages over the same SMTP
2730 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2731 ${reduce, with only minor "tidies".
2733 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2735 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2736 expansion side effects.
2738 PH/27 When a message times out after an over-quota error from an Exim-imposed
2739 quota, the bounce message says "mailbox is full". This message was not
2740 being given when it was a system quota that was exceeded. It now should
2743 MH/03 Made $recipients available in local_scan(). local_scan() already has
2744 better access to the recipient list through recipients_list[], but
2745 $recipients can be useful in postmaster-provided expansion strings.
2747 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2748 in the case of a MAIL command with additional options following the
2749 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2750 were accidentally chopped off.
2752 PH/29 SMTP synchronization checks are implemented when a command is read -
2753 there is a check that no more input is waiting when there shouldn't be
2754 any. However, for some commands, a delay in an ACL can mean that it is
2755 some time before the response is written. In this time, more input might
2756 arrive, invalidly. So now there are extra checks after an ACL has run for
2757 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2758 pipelining has not been advertised.
2760 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2762 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2763 returned in the SMTP response when smtp_return_error_details was false.
2764 This has been fixed.
2766 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2767 instead of the C I/O that was originally supplied, because problems were
2768 reported on Solaris.
2770 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2771 Exim which did not show up earlier: it was assuming that a call to
2772 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2773 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2774 was a macro that became an assignment, so it seemed to work. This has
2775 changed to a proper function call with a void return, hence the compile
2776 error. Exim's code has been fixed.
2778 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2781 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2783 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2785 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2786 because it turns out to be too big or there is a timeout) there is no
2787 "Completed" line in the log. When some messages of this type were
2788 selected by exigrep, they were listed as "not completed". Others were
2789 picked up by some special patterns. I have improved the selection
2790 criteria to be more general.
2792 PH/38 The host_find_failed option in the manualroute router can now be set
2793 to "ignore", to completely ignore a host whose IP address cannot be
2794 found. If all hosts are ignored, the behaviour is controlled by the new
2795 host_all_ignored option.
2797 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2798 homing or because of multiple MX records with /mx) generated more than
2799 one IP address, and the following item turned out to be the local host,
2800 all the secondary addresses of the first item were incorrectly removed
2801 from the list, along with the local host and any following hosts (which
2802 is what is supposed to happen).
2804 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2805 whoever called Exim into the -H file. In the case of the daemon it was
2806 behaving confusingly. When first started, it used values for whoever
2807 started the daemon, but after a SIGHUP it used the Exim user (because it
2808 calls itself on a restart). I have changed the code so that it now always
2811 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2812 message are rejected with the same error (e.g. no authentication or bad
2813 sender address), and a DATA command is nevertheless sent (as can happen
2814 with PIPELINING or a stupid MUA), the error message that was given to the
2815 RCPT commands is included in the rejection of the DATA command. This is
2816 intended to be helpful for MUAs that show only the final error to their
2819 PH/42 Another patch from the Sieve maintainer.
2821 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2822 Eximstats - Fixed some broken HTML links and added missing column headers
2824 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2825 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2827 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2829 PH/43 Yet another patch from the Sieve maintainer.
2831 PH/44 I found a way to check for a TCP/IP connection going away before sending
2832 the response to the final '.' that terminates a message, but only in the
2833 case where the client has not sent further data following the '.'
2834 (unfortunately, this is allowed). However, in many cases there won't be
2835 any further data because there won't be any more messages to send. A call
2836 to select() can be used: if it shows that the input is "ready", there is
2837 either input waiting, or the socket has been closed. An attempt to read
2838 the next input character can distinguish the two cases. Previously, Exim
2839 would have sent an OK response which the client would never have see.
2840 This could lead to message repetition. This fix should cure that, at
2841 least in a lot of common cases.
2843 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2844 advertised in response to EHLO.
2850 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2851 fixed by 4.65/MH/01 (is this a record?) are fixed:
2853 (i) An empty string was always treated as zero by the numeric comparison
2854 operators. This behaviour has been restored.
2856 (ii) It is documented that the numeric comparison operators always treat
2857 their arguments as decimal numbers. This was broken in that numbers
2858 starting with 0 were being interpreted as octal.
2860 While fixing these problems I realized that there was another issue that
2861 hadn't been noticed. Values of message_size_limit (both the global option
2862 and the transport option) were treated as octal if they started with 0.
2863 The documentation was vague. These values are now always treated as
2864 decimal, and I will make that clear in the documentation.
2870 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2871 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2874 MH/01 Don't check that the operands of numeric comparison operators are
2875 integers when their expansion is in "skipping" mode (fixes bug
2876 introduced by 4.64-PH/07).
2878 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2879 child addresses, Exim now panics and dies. Previously, because the count
2880 is held in a short int, deliveries were likely to be lost. As such a
2881 large number of recipients for a single message is ridiculous
2882 (performance will be very, very poor), I have chosen to impose a limit
2883 rather than extend the field.
2889 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2890 leftover -K file (the existence of which was triggered by #402).
2891 While we were at it, introduced process PID as part of the -K
2892 filename. This should rule out race conditions when creating
2895 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2896 processing considerably. Previous code took too long for large mails,
2897 triggering a timeout which in turn triggers #401.
2899 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2900 in the DK code in transports.c. sendfile() is not really portable,
2901 hence the _LINUX specificness.
2903 TF/01 In the add_headers option to the mail command in an Exim filter,
2904 there was a bug that Exim would claim a syntax error in any
2905 header after the first one which had an odd number of characters
2908 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2909 callout verification, Exim cached a "reject" for the entire domain. This
2910 is correct for most verifications, but it is not correct for a recipient
2911 verification with use_sender or use_postmaster set, because in that case
2912 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2913 case of MAIL FROM:<> rejection from other early rejections (e.g.
2914 rejection of HELO). When verifying a recipient using a non-null MAIL
2915 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2916 Whatever the result of the callout, the value of the domain cache is
2917 left unchanged (for any other kind of callout, getting as far as trying
2918 RCPT means that the domain itself is ok).
2920 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2923 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2924 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2925 session, the daemon ignores ECONNECT errors and logs others; it now
2926 ignores EPIPE as well.
2928 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2929 (quoted-printable decoding).
2931 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2932 later the small subsequent patch to fix an introduced bug.
2934 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2936 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2938 PH/08 An error is now given if message_size_limit is specified negative.
2940 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2941 to be given (somewhat) arbitrary names.
2943 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2946 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2947 miscellaneous code fixes
2949 PH/10 Added the log_reject_target ACL modifier to specify where to log
2952 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2953 hostname. This is wrong, because it relates to the incoming message (and
2954 probably the interface on which it is arriving) and not to the outgoing
2955 callout (which could be using a different interface). This has been
2956 changed to use the value of the helo_data option from the smtp transport
2957 instead - this is what is used when a message is actually being sent. If
2958 there is no remote transport (possible with a router that sets up host
2959 addresses), $smtp_active_hostname is used.
2961 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2962 tweaks were necessary in order to get it to work (see also 21 below):
2963 (a) The code assumed that strncpy() returns a negative number on buffer
2964 overflow, which isn't the case. Replaced with Exim's string_format()
2966 (b) There were several signed/unsigned issues. I just did the minimum
2967 hacking in of casts. There is scope for a larger refactoring.
2968 (c) The code used strcasecmp() which is not a standard C function.
2969 Replaced with Exim's strcmpic() function.
2970 (d) The code set only $1; it now sets $auth1 as well.
2971 (e) A simple test gave the error "authentication client didn't specify
2972 service in request". It would seem that Dovecot has changed its
2973 interface. Fortunately there's a specification; I followed it and
2974 changed what the client sends and it appears to be working now.
2976 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2979 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2980 address A is aliased to B and C, where B exists and C does not. Without
2981 -v the output is "A verified" because verification stops after a
2982 successful redirection if more than one address is generated. However,
2983 with -v the child addresses are also verified. Exim was outputting "A
2984 failed to verify" and then showing the successful verification for C,
2985 with its parentage. It now outputs "B failed to verify", showing B's
2986 parentage before showing the successful verification of C.
2988 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2989 look up a TXT record in a specific list after matching in a combined
2992 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2993 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2994 they consult the DNS. I had assumed they would set it the way they
2995 wanted; and indeed my experiments on Linux seem to show that in some
2996 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2997 To be on the safe side, however, I have now made the interface to
2998 host_find_byname() similar to host_find_bydns(), with an argument
2999 containing the DNS resolver options. The host_find_byname() function now
3000 sets these options at its start, just as host_find_bydns() does. The smtp
3001 transport options dns_qualify_single and dns_search_parents are passed to
3002 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3003 of host_find_byname() use the default settings of RES_DEFNAMES
3004 (qualify_single) but not RES_DNSRCH (search_parents).
3006 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3007 spool_read_header() do less string testing, by means of a preliminary
3008 switch on the second character of optional "-foo" lines. (This is
3009 overdue, caused by the large number of possibilities that now exist.
3010 Originally there were few.) While I was there, I also converted the
3011 str(n)cmp tests so they don't re-test the leading "-" and the first
3012 character, in the hope this might squeeze out yet more improvement.
3014 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3015 flag allowing group syntax was set by the header_syntax check but not
3016 turned off, possible causing trouble later; (2) The flag was not being
3017 set at all for the header_verify test, causing "group"-style headers to
3018 be rejected. I have now set it in this case, and also caused header_
3019 verify to ignore an empty address taken from a group. While doing this, I
3020 came across some other cases where the code for allowing group syntax
3021 while scanning a header line wasn't quite right (mostly, not resetting
3022 the flag correctly in the right place). These bugs could have caused
3023 trouble for malformed header lines. I hope it is now all correct.
3025 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3026 with the "reply" argument non-NULL. The code, however (which originally
3027 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3028 but it didn't always do it. This confused somebody who was copying the
3029 code for some other use. I have removed all the tests.
3031 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3032 feature that was used to support insecure browsers during the U.S. crypto
3033 embargo. It requires special client support, and Exim is probably the
3034 only MTA that supported it -- and would never use it because real RSA is
3035 always available. This code has been removed, because it had the bad
3036 effect of slowing Exim down by computing (never used) parameters for the
3037 RSA_EXPORT functionality.
3039 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3040 authenticator to fail if there's a tab character in the incoming data
3041 (there should never be unless someone is messing about, as it's supposed
3042 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3043 if the connection is using TLS or if the remote IP is the same as the
3044 local IP, and the "valid-client-cert option" if a client certificate has
3047 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3048 authenticators. This can be used for authorization after authentication
3049 succeeds. (In the case of plaintext, it servers for both authentication
3052 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3053 if any retry times were supplied.
3055 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3056 connection, where there is no client IP address to check. In this
3057 situation, the verify now always succeeds.
3059 PH/25 Applied John Jetmore's -Mset patch.
3061 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3063 PH/27 In a string expansion for a processed (not raw) header when multiple
3064 headers of the same name were present, leading whitespace was being
3065 removed from all of them, but trailing whitespace was being removed only
3066 from the last one. Now trailing whitespace is removed from each header
3067 before concatenation. Completely empty headers in a concatenation (as
3068 before) are ignored.
3070 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3071 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3073 PH/29 [Removed. This was a change that I later backed out, and forgot to
3074 correct the ChangeLog entry (that I had efficiently created) before
3075 committing the later change.]
3077 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3078 address errors (4xx response to RCPT) over the same connection as other
3079 messages routed to the same hosts. Such deliveries are always "forced",
3080 so retry times are not inspected. This resulted in far too many retries
3081 for the affected addresses. The effect occurred only when there were more
3082 hosts than the hosts_max_try setting in the smtp transport when it had
3083 the 4xx errors. Those hosts that it had tried were not added to the list
3084 of hosts for which the message was waiting, so if all were tried, there
3085 was no problem. Two fixes have been applied:
3087 (i) If there are any address or message errors in an SMTP delivery, none
3088 of the hosts (tried or untried) are now added to the list of hosts
3089 for which the message is waiting, so the message should not be a
3090 candidate for sending over the same connection that was used for a
3091 successful delivery of some other message. This seems entirely
3092 reasonable: after all the message is NOT "waiting for some host".
3093 This is so "obvious" that I'm not sure why it wasn't done
3094 previously. Hope I haven't missed anything, but it can't do any
3095 harm, as the worst effect is to miss an optimization.
3097 (ii) If, despite (i), such a delivery is accidentally attempted, the
3098 routing retry time is respected, so at least it doesn't keep
3099 hammering the server.
3101 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3102 in ${readsocket because some servers need this prod.
3104 PH/32 Added some extra debug output when updating a wait-xxx database.
3106 PH/33 The hint "could be header name not terminated by colon", which has been
3107 given for certain expansion errors for a long time, was not being given
3108 for the ${if def:h_colon_omitted{... case.
3110 PH/34 The spec says: "With one important exception, whenever a domain list is
3111 being scanned, $domain contains the subject domain." There was at least
3112 one case where this was not true.
3114 PH/35 The error "getsockname() failed: connection reset by peer" was being
3115 written to the panic log as well as the main log, but it isn't really
3116 panic-worthy as it just means the connection died rather early on. I have
3117 removed the panic log writing for the ECONNRESET error when getsockname()
3120 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3121 runs only) independently of the message's sender address. This meant
3122 that, if the 4xx error was in fact related to the sender, a different
3123 message to the same recipient with a different sender could confuse
3124 things. In particular, this can happen when sending to a greylisting
3125 server, but other circumstances could also provoke similar problems.
3126 I have changed the default so that the retry time for these errors is now
3127 based a combination of the sender and recipient addresses. This change
3128 can be overridden by setting address_retry_include_sender=false in the
3131 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3132 remote server are returned as part of bounce messages. This was not
3133 happening for LMTP over a pipe (the lmtp transport), but now it is the
3134 same for both kinds of LMTP.
3136 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3137 in header lines that were in fact CNAMEs. This is no longer the case.
3139 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3140 and queue runs started by the daemon processed all messages. This has
3141 been fixed so that -R and -S can now usefully be given with -q<time>.
3143 PH/40 Import PCRE release 6.7 (fixes some bugs).
3145 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3147 PH/42 Give an error if -q is specified more than once.
3149 PH/43 Renamed the variables $interface_address and $interface_port as
3150 $received_ip_address and $received_port, to make it clear that these
3151 values apply to message reception, and not to the outgoing interface when
3152 a message is delivered. (The old names remain recognized, of course.)
3154 PH/44 There was no timeout on the connect() call when using a Unix domain
3155 socket in the ${readsocket expansion. There now is.
3157 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3158 be meaningful with "accept".
3160 SC/01 Eximstats V1.43
3161 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3163 SC/02 Eximstats V1.44
3164 Use a glob alias rather than an array ref in the generated
3165 parser. This improves both readability and performance.
3167 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3168 Collect SpamAssassin and rejection statistics.
3169 Don't display local sender or destination tables unless
3170 there is data to show.
3171 Added average volumes into the top table text output.
3173 SC/04 Eximstats V1.46
3174 Collect data on the number of addresses (recipients)
3175 as well as the number of messages.
3177 SC/05 Eximstats V1.47
3178 Added 'Message too big' to the list of mail rejection
3179 reasons (thanks to Marco Gaiarin).
3181 SC/06 Eximstats V1.48
3182 Mainlog lines which have GMT offsets and are too short to
3183 have a flag are now skipped.
3185 SC/07 Eximstats V1.49 (Alain Williams)
3186 Added the -emptyok flag.
3188 SC/08 Eximstats V1.50
3189 Fixes for obtaining the IP address from reject messages.
3191 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3192 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3193 whitespace changes from 4.64-PH/27
3195 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3198 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3199 are found, allow negative numbers in numeric criteria)
3201 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3203 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3204 to match changes made in 4.64-PH/43
3206 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3208 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3209 "domain" is actually an IP address, and force a failure. This locks out
3210 those revolvers/nameservers that support "A-for-A" lookups, in
3211 contravention of the specifications.
3213 PH/48 When a host name was looked up from an IP address, and the subsequent
3214 forward lookup of the name timed out, the host name was left in
3215 $sender_host_name, contrary to the specification.
3217 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3218 restricted to single-key lookups, Exim was not diagnosing an error if
3219 * or *@ was used with a query-style lookup.
3221 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3223 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3224 long ago, but noone interested enough thought of it. Let's just say that
3225 the "1.1" means that there are some new functions that weren't there at
3226 some point in the past.
3228 PH/51 Error processing for expansion failure of helo_data from an smtp
3229 transport during callout processing was broken.
3231 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3232 tested/used via the -bh/-bhc/-bs options.
3234 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3235 bug, fixed in subsequent PCRE releases).
3237 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3238 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3240 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3246 SC/01 Use a glob alias rather than an array ref in eximstats generated
3247 parser. This improves both readability and performance.
3249 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3250 Don't display local sender or destination tables in eximstats unless
3251 there is data to show.
3252 Added average volumes into the eximstats top table text output.
3254 SC/03 Collect data on the number of addresses (recipients) as well
3255 as the number of messages in eximstats.
3257 TF/01 Correct an error in the documentation for the redirect router. Exim
3258 does (usually) call initgroups() when daemonizing.
3260 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3261 with consistent privilege compared to when running as a daemon.
3263 TF/03 Note in the spec that $authenticated_id is not set for local
3264 submissions from trusted users.
3266 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3267 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3269 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3270 by adding some example configuration directives to the default
3271 configuration file. A little bit of work is required to uncomment the
3272 directives and define how usernames and passwords are checked, but
3273 there is now a framework to start from.
3275 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3276 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3277 without this. I don't know how relevant this is to other LDAP libraries.
3279 PH/02 Add the verb name to the "unknown ACL verb" error.
3281 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3283 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3285 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3286 directory not expanded when it should be if an expanded home directory
3287 was set for the address (which is overridden by the transport).
3289 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3292 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3293 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3294 because it is too late at that time, and has no effect.
3296 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3297 security issue with \' (bugzilla #107). I could not use the
3298 PQescapeStringConn() function, because it needs a PGconn value as one of
3301 PH/08 When testing addresses using -bt, indicate those final addresses that
3302 are duplicates that would not cause an additional delivery. At least one
3303 person was confused, thinking that -bt output corresponded to deliveries.
3304 (Suppressing duplicates isn't a good idea as you lose the information
3305 about possibly different redirections that led to the duplicates.)
3307 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3308 systems where poll() doesn't work, in particular OS X.
3310 PH/10 Added more information to debugging output for retry time not reached.
3312 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3313 operations in malware.c.
3315 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3318 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3319 syslog_duplication set false, log lines that would normally be written
3320 both the the main log and to the reject log were not written to syslog at
3323 PH/14 In the default configuration, change the use of "message" in ACL warn
3324 statements to "add_header".
3326 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3327 not followed by a command (e.g. "seen endif").
3329 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3330 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3333 PH/17 Added extra conditions to the default value of delay_warning_condition
3337 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3338 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3339 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3342 The Auto-Submitted: and various List- headers are standardised, whereas I
3343 don't think Precedence: ever was.
3345 PH/18 Refactored debugging code in route_finduser() to show more information,
3346 in particular, the error code if getpwnam() issues one.
3348 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3349 This is apparently needed in addition to the PH/07 change above to avoid
3350 any possible encoding problems.
3352 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3353 but not after initializing Perl.
3355 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3356 output them only if debugging. By default they are written stderr,
3357 apparently, which is not desirable.
3359 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3362 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3365 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3367 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3368 authenticated or an ident call has been made. Suppress the default
3369 values for $authenticated_id and $authenticated_sender (but permit -oMai
3370 and -oMas) when testing with -bh.
3372 PH/24 Re-jigged the order of the tests in the default configuration so that the
3373 tests for valid domains and recipients precede the DNS black list and CSA
3374 tests, on the grounds that those ones are more expensive.
3376 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3377 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3378 This bug exists in every version of Exim that I still have, right back to
3381 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3382 However, an attempt to turn on case-sensitivity in a regex key by
3383 including (?-i) didn't work because the subject string was already
3384 lowercased, and the effects were non-intuitive. It turns out that a
3385 one-line patch can be used to allow (?-i) to work as expected.
3391 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3392 other effects) broke the use of negated acl sub-conditions.
3394 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3397 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3398 "Deny" causes Exim to reject the incoming connection with a 554 error.
3399 Unfortunately, if there is a major crisis, such as a disk failure,
3400 tcp-wrappers gives "deny", whereas what one would like would be some
3401 kind of temporary error. A kludge has been added to help with this.
3402 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3403 554 error is used if errno is still zero or contains ENOENT (which occurs
3404 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3407 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3409 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3410 errors. Otherwise a message that provokes a temporary error (when other
3411 messages do not) can cause a whole host to time out.
3413 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3414 addresses were routed directly to files or pipes from a redirect router.
3415 File deliveries just didn't batch; pipe deliveries might have suffered
3418 PH/06 A failure to get a lock for a hints database would erroneously always say
3419 "Failed to get write lock", even when it was really a read lock.
3421 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3422 of 0600. This has been changed to use the value of the lockfile_mode
3423 option (which defaults to 0600).
3425 PH/08 Applied small patch from the Sieve maintainer.
3427 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3428 folder from quota calculations, a direct delivery into this folder messed
3429 up the contents of the maildirsize file. This was because the regex was
3430 used only to exclude .Trash (or whatever) when the size of the mailbox
3431 was calculated. There was no check that a delivery was happening into an
3432 excluded directory. This bug has been fixed by ignoring all quota
3433 processing for deliveries into excluded directories.
3435 PH/10 Added the maildirfolder_create_regex option to appendfile.
3441 PH/01 The code for finding all the local interface addresses on a FreeBSD
3442 system running IPv6 was broken. This may well have applied to all BSD
3443 systems, as well as to others that have similar system calls. The broken
3444 code found IPv4 interfaces correctly, but gave incorrect values for the
3445 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3446 that it would not match correctly against @[] and not recognize the IPv6
3449 PH/02 The ipliteral router was not recognizing addresses of the form user@
3450 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3452 PH/03 Added disable_ipv6.
3454 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3455 decoded form, because it is most often used to construct To: headers
3456 lines in autoreplies, and the decoded form may well be syntactically
3457 invalid. However, $reply_address has leading white space removed, and all
3458 newlines turned into spaces so that the autoreply transport does not
3461 PH/05 If group was specified without a user on a router, and no group or user
3462 was specified on a transport, the group from the router was ignored.
3464 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3465 for visible compile-time settings that can be used to change these
3466 numbers, for those that want even more. Backwards compatibility with old
3467 spool files has been maintained. However, going back to a previous Exim
3468 release will lost any variables that are in spool files.
3470 PH/07 Two small changes when running in the test harness: increase delay when
3471 passing a TCP/IP connection to a new process, in case the original
3472 process has to generate a bounce, and remove special handling of
3473 127.0.0.2 (sic), which is no longer necessary.
3475 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3476 be the same on different OS.
3478 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3481 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3482 whether --show-vars was specified or not
3484 JJ/02 exipick: Added support for new ACL variable spool format introduced
3487 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3488 syntactically invalid From: or Reply-to: line, and a filter used this to
3489 generate an autoreply, and therefore failed to obtain an address for the
3490 autoreply, Exim could try to deliver to a non-existent relative file
3491 name, causing unrelated and misleading errors. What now happens is that
3492 it logs this as a hard delivery error, but does not attempt to create a
3495 PH/11 The exinext utility has a -C option for testing purposes, but although
3496 the given file was scanned by exinext itself; it wasn't being passed on
3497 when Exim was called.
3499 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3500 an end-of-file indication when reading a command response.
3502 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3503 compiled. In many other places in Exim, IPv6 addresses are always
3504 recognized, so I have changed this. It also means that IPv4 domain
3505 literals of the form [IPV4:n.n.n.n] are now always recognized.
3507 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3508 used if the router is not running as root, for example, when verifying at
3509 ACL time, or when using -bh. The debugging output from this situation was
3510 non-existent - all you got was a failure to exec. I have made two
3513 (a) Failures to set uid/gid, the current directory, or a process leader
3514 in a subprocess such as that created by queryprogram now generate
3515 suitable debugging output when -d is set.
3517 (b) The queryprogram router detects when it is not running as root,
3518 outputs suitable debugging information if -d is set, and then runs
3519 the subprocess without attempting to change uid/gid.
3521 PH/15 Minor change to Makefile for building test_host (undocumented testing
3524 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3525 additional section of a DNS packet that returns MX or SRV records.
3526 Instead, it always explicitly searches for A/AAAA records. This avoids
3527 major problems that occur when a DNS server includes only records of one
3528 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3529 fixed another bug: if SRV records were looked up and the corresponding
3530 address records were *not* found in the additional section, the port
3531 values from the SRV records were lost.
3533 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3534 using the correct key (the original address) when searching the retry
3535 rules in order to find which one to use for generating the retry hint.
3537 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3538 adding the default one. Similarly, if it contains a Reply-To: header, the
3539 errors_reply_to option, if set, is not used.
3541 PH/19 When calculating a retry time, Exim used to measure the "time since
3542 failure" by looking at the "first failed" field in the retry record. Now
3543 it does not use this if it is later than than the arrival time of the
3544 message. Instead it uses the arrival time. This makes for better
3545 behaviour in cases where some deliveries succeed, thus re-setting the
3546 "first failed" field. An example is a quota failure for a huge message
3547 when small messages continue to be delivered. Without this change, the
3548 "time since failure" will always be short, possible causing more frequent
3549 delivery attempts for the huge message than are intended.
3550 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3552 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3553 $1, $2, $3) because the numerical variables can be reset during some
3554 expansion items (e.g. "match"), thereby losing the authentication data.
3556 PH/21 Make -bV show the size of off_t variables so that the test suite can
3557 decide whether to run tests for quotas > 2G.
3559 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3560 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3561 filecount value is greater than 2G or if a quota value is greater than 2G
3562 on a system where the size of off_t is not greater than 4, a panic error
3565 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3566 never match. The debug and -bh output now contains an explicit error
3567 message indicating a malformed IPv4 address or mask.
3569 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3570 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3571 PH/23 above applies.
3573 PH/25 Do not write to syslog when running in the test harness. The only
3574 occasion when this arises is a failure to open the main or panic logs
3575 (for which there is an explicit test).
3577 PH/26 Added the /no_tell option to "control=freeze".
3579 PH/27 If a host name lookup failed very early in a connection, for example, if
3580 the IP address matched host_lookup and the reverse lookup yielded a name
3581 that did not have a forward lookup, an error message of the form "no IP
3582 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3583 could be logged. Now it outputs the IP address instead of "NULL".
3585 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3586 allows the sender and the authenticated sender to be set when
3587 submitting a message from within Exim. Since child_open_exim() is
3588 documented for local_scan(), the new function should be too.
3590 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3591 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3592 results in an empty string is now treated as unset.
3594 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3596 PH/31 Added sender_verify_fail logging option.
3598 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3599 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3600 tidied the source and removed it altogether.
3602 PH/33 When a queue run was abandoned because the load average was too high, a
3603 log line was always written; now it is written only if the queue_run log
3604 selector is set. In addition, the log line for abandonment now contains
3605 information about the queue run such as the pid. This is always present
3606 in "start" and "stop" lines but was omitted from the "abandon" line.
3608 PH/34 Omit spaces between a header name and the colon in the error message that
3609 is given when verify = headers_syntax fails (if there are lots of them,
3610 the message gets confusing).
3612 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3613 names, as there are now some PTR records that contain slashes. This check
3614 is only to protect against broken name servers that fall over on strange
3615 characters, so the fact that it applies to all lookups doesn't matter.
3617 PH/36 Now that the new test suite is complete, we can remove some of the
3618 special code in Exim that was needed for the old test suite. For example,
3619 sorting DNS records because real resolvers return them in an arbitrary
3620 order. The new test suite's fake resolver always returns records in the
3623 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3624 bounces) except when queue_only is set, to avoid logging races between
3625 the different processes.
3627 PH/38 Panic-die if .include specifies a non-absolute path.
3629 PH/39 A tweak to the "H" retry rule from its user.
3631 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3632 a label. They prevented compilation on older perls.
3634 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3635 a warning to be raised on newish perls.
3637 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3638 on queue. Changes to match documented behaviour of showing count of
3639 messages matching specified criteria.
3641 PH/40 Changed the default ident timeout from 30s to 5s.
3643 PH/41 Added support for the use of login_cap features, on those BSD systems
3644 that have them, for controlling the resources used by pipe deliveries.
3646 PH/42 The content-scanning code uses fopen() to create files in which to put
3647 message data. Previously it was not paying any attention to the mode of
3648 the files. Exim runs with umask(0) because the rest of the code creates
3649 files with open(), and sets the required mode explicitly. Thus, these
3650 files were ending up world-writeable. This was not a big issue, because,
3651 being within the spool directory, they were not world-accessible. I have
3652 created a function called modefopen, which takes an additional mode
3653 argument. It sets umask(777), creates the file, chmods it to the required
3654 mode, then resets the umask. All the relevant calls to fopen() in the
3655 content scanning code have been changed to use this function.
3657 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3658 to 24 hours. This avoids potential overflow problems when processing G
3659 and H retry rules. I suspect nobody ever tinkers with this value.
3661 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3663 PH/45 When the plaintext authenticator is running as a client, the server's
3664 challenges are checked to ensure they are valid base64 strings. By
3665 default, the authentication attempt is cancelled if an invalid string is
3666 received. Setting client_ignore_invalid_base64 true ignores these errors.
3667 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3668 they are received. Thus, the responses can be made to depend on the
3669 challenges. If an invalid string is ignored, an empty string is placed in
3672 PH/46 Messages that are created by the autoreply transport now contains a
3673 References: header, in accordance with RFCs 2822 and 3834.
3675 PH/47 Added authenticated_sender_force to the smtp transport.
3677 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3679 PH/49 Installed latest patch from the Sieve maintainer.
3681 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3682 was also set, the appendfile transport was unnecessarily scanning a
3683 directory of message files (e.g. for maildir delivery) to find the count
3684 of files (along with the size), even though it did not need this
3685 information. It now does the scan only if it needs to find either the
3686 size of the count of files.
3688 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3690 PH/52 Two bugs concerned with error handling when the smtp transport is
3693 (i) Exim was not creating retry information for temporary errors given
3694 for individual recipients after the DATA command when the smtp transport
3695 was used in LMTP mode. This meant that they could be retried too
3696 frequently, and not timed out correctly.
3698 (ii) Exim was setting the flag that allows error details to be returned
3699 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3700 recipients that were returned after the DATA command.
3702 PH/53 This is related to PH/52, but is more general: for any failing address,
3703 when detailed error information was permitted to be returned to the
3704 sender, but the error was temporary, then after the final timeout, only
3705 "retry timeout exceeded" was returned. Now it returns the full error as
3706 well as "retry timeout exceeded".
3708 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3709 do this, and (what is worse) MTAs that accept it.
3711 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3712 will now be deprecated.
3714 PH/56 New os.c-cygwin from the Cygwin maintainer.
3716 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3717 formats (previously only available in exim formats via -bpr, -bpru,
3718 and -bpra. Now also available in native and exiqgrep formats)
3720 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3721 with very large, slow to parse queues
3723 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3725 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3727 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3728 responses to authentication challenges, though it was showing the
3729 challenges; (ii) I've removed the CR characters from the debug output for
3732 PH/58 Allow for the insertion of a newline as well as a space when a string
3733 is turned into more than one encoded-word during RFC 2047 encoding. The
3734 Sieve code now uses this.
3736 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3737 data_4xx, lost_connection, tls_required.
3739 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3740 message was being sent as an SMTP response.
3742 PH/61 Add -l and -k options to exicyclog.
3744 PH/62 When verifying, if an address was redirected to one new address, so that
3745 verification continued, and the new address failed or deferred after
3746 having set something in $address_data, the value of $address_data was not
3747 passed back to the ACL. This was different to the case when no
3748 redirection occurred. The value is now passed back in both cases.
3750 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3751 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3752 use login_cap.h, so on its own it isn't the distinguishing feature. The
3753 new name refers directly to the setclassresources() function.
3755 PH/65 Added configuration files for NetBSD3.
3757 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3759 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3760 is preferred over IPv4.
3762 PH/68 The bounce_return_message and bounce_return_body options were not being
3763 honoured for bounces generated during the reception of non-SMTP messages.
3764 In particular, this applied to messages rejected by the ACL. This bug has
3765 been fixed. However, if bounce_return_message is true and bounce_return_
3766 body is false, the headers that are returned for a non-SMTP message
3767 include only those that have been read before the error was detected.
3768 (In the case of an ACL rejection, they have all been read.)
3770 PH/69 The HTML version of the specification is now built in a directory called
3771 spec_html instead of spec.html, because the latter looks like a path with
3772 a MIME-type, and this confuses some software.
3774 PH/70 Catch two compiler warnings in sieve.c.
3776 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3777 function verify_get_ident() calls ip_connect() to connect a socket, but
3778 if the "connect()" function timed out, ip_connect() used to close the
3779 socket. However, verify_get_ident() also closes the socket later, and in
3780 between Exim writes to the log, which may get opened at this point. When
3781 the socket was closed in ip_connect(), the log could get the same file
3782 descriptor number as the socket. This naturally causes chaos. The fix is
3783 not to close the socket in ip_connect(); the socket should be closed by
3784 the function that creates it. There was only one place in the code where
3785 this was missing, in the iplookup router, which I don't think anybody now
3786 uses, but I've fixed it anyway.
3788 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3789 well as to direct DNS lookups. Otherwise the handling of names in host
3790 lists is inconsistent and therefore confusing.
3796 PH/01 Two changes to the default runtime configuration:
3798 (1) Move the checks for relay_from_hosts and authenticated clients from
3799 after to before the (commented out) DNS black list checks.
3801 (2) Add control=submission to the relay_from_hosts and authenticated
3802 clients checks, on the grounds that messages accepted by these
3803 statements are most likely to be submissions.
3805 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3807 (1) Generate an error if the third argument for the ${prvs expansion is
3810 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3813 (3) Reset the variables that are obtained from the first argument of
3814 ${prvscheck and used in the second argument before leaving the code,
3815 because their memory is reclaimed, so using them afterwards may do
3818 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3819 one (it's much easier than Tom thought :-).
3821 (5) Because of (4), we can now allow for the use of $prvscheck_result
3822 inside the third argument.
3824 PH/03 For some reason, the default setting of PATH when running a command from
3825 a pipe transport was just "/usr/bin". I have changed it to
3828 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3829 anything to be listed in the output from -bV.
3831 PH/05 When a filter generated an autoreply, the entire To: header line was
3832 quoted in the delivery log line, like this:
3834 => >A.N.Other <ano@some.domain> <original@ddress> ...
3836 This has been changed so that it extracts the operative address. There
3837 may be more than one such address. If so, they are comma-separated, like
3840 => >ano@some.domain,ona@other.domain <original@ddress> ...
3842 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3843 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3844 not being looked up in the rDNS to get a host name, Exim was showing the
3845 IP address twice in Received: lines, even though the IP addresses were
3846 identical. For example:
3848 Received: from [1.2.3.4] (helo=[1.2.3.4])
3850 However, if the real host name was known, it was omitting the HELO data
3851 if it matched the actual IP address. This has been tidied up so that it
3852 doesn't show the same IP address twice.
3854 PH/07 When both +timestamp and +memory debugging was on, the value given by
3855 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3856 called by the debug printing, thereby overwriting the timestamp buffer.
3857 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3859 PH/08 When the original message was included in an autoreply transport, it
3860 always said "this is a copy of the message, including all the headers",
3861 even if body_only or headers_only was set. It now gives an appropriate
3864 PH/09 Applied a patch from the Sieve maintainer which:
3866 o fixes some comments
3867 o adds the (disabled) notify extension core
3868 o adds some debug output for the result of if/elsif tests
3869 o points to the current vacation draft in the documentation
3870 and documents the missing references header update
3874 o fixes a bug in processing the envelope test (when testing
3875 multiple envelope elements, the last element determined the
3878 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3879 Electronic Mail") by including:
3881 Auto-submitted: auto-generated
3883 in the messages that it generates (bounce messages and others, such as
3884 warnings). In the case of bounce messages for non-SMTP messages, there was
3885 also a typo: it was using "Auto_submitted" (underscore instead of
3886 hyphen). Since every message generated by Exim is necessarily in response
3887 to another message, thes have all been changed to:
3889 Auto-Submitted: auto-replied
3891 in accordance with these statements in the RFC:
3893 The auto-replied keyword:
3895 - SHOULD be used on messages sent in direct response to another
3896 message by an automatic process,
3898 - MUST NOT be used on manually-generated messages,
3900 - MAY be used on Delivery Status Notifications (DSNs) and Message
3901 Disposition Notifications (MDNs),
3903 - MUST NOT be used on messages generated by automatic or periodic
3904 processes, except for messages which are automatic responses to
3907 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3908 to the default Received: header definition.
3910 PH/12 Added log selector acl_warn_skipped (default on).
3912 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3913 variables because (a) they are in the wrong storage pool and (b) even if
3914 they were copied, it wouldn't work properly because of the caching.
3916 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3917 checking when decoding. Apparently there are clients that generate
3918 overlong encoded strings. Why am I not surprised?
3920 PH/15 If the first argument of "${if match_address" was not empty, but did not
3921 contain an "@" character, Exim crashed. Now it writes a panic log message
3922 and treats the condition as false.
3924 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3926 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3927 extension "envelope-auth". The code is finished and in agreement with
3928 other implementations, but there is no documentation so far and in fact,
3929 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3930 not changing the active code.
3932 Print executed "if" and "elsif" statements when debugging is used. This
3933 helps a great deal to understand what a filter does.
3935 Document more things not specified clearly in RFC3028. I had all this
3936 sorted out, when out of a sudden new issues came to my mind. Oops."
3938 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3941 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3942 canonical form (as documented). However, after a host name lookup from
3943 the IP address, check_host() was doing a simple string comparison with
3944 addresses acquired from the DNS when checking that the found name did
3945 have the original IP as one of its addresses. Since any found IPv6
3946 addresses are likely to be in abbreviated form, the comparison could
3947 fail. Luckily, there already exists a function for doing the comparison
3948 by converting both addresses to binary, so now that is used instead of
3949 the text comparison.
3951 PH/20 There was another similar case to PH/19, when a complete host name was
3952 given in a host list; looking up its IP address could give an abbreviated
3953 form, whereas the current host's name might or might not be abbreviated.
3954 The same fix has been applied.
3960 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3961 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3964 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3965 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3967 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3969 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3970 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3971 Also, for "Auto-Submitted", treat anything other than "no" as
3972 non-personal, in accordance with RFC 3834. (Previously it treated
3973 anything starting "auto-" as non-personal.)
3975 TF/01 The control=submission/name=... option had a problem with syntax
3976 errors if the name included a slash character. The /name= option
3977 now slurps the rest of the string, so it can include any characters
3978 but it must come last in the list of options (after /sender_retain
3981 PH/05 Some modifications to the interface to the fake nameserver for the new
3989 TK/01 Added the "success_on_redirect" address verification option. See
3990 NewStuff for rationale and an example.
3992 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3994 PH/02 Patch to exigrep to allow it to work on syslog lines.
3996 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3997 fread() to skip over the body file's header line, because in Cygwin the
3998 header line is locked and is inaccessible.
4000 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4001 co-exist for some time) to make it clear that it is the Exim ID that is
4002 referenced, not the Message-ID: header line.
4004 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4005 string_format() function, because snprintf() does not exist on all
4008 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4009 ${stat: expansion item.
4011 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4012 protocol synchronization error", to keep the pedants happy.
4014 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4015 well as for IRIX systems, when gcc is being used. See the host.c source
4018 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4020 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4023 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4024 transport and to the smtp transport in LMTP mode.
4026 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4028 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4029 run a filter in a subprocess. This could lead to confusion in subsequent
4030 lookups in the parent process. There should also be a search_tidyup() at
4031 the end of the subprocess.
4033 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4034 only if the host matched helo_try_verify_hosts, which caused the
4035 verification to occur when the EHLO/HELO command was issued. The ACL just
4036 tested the remembered result. Now, if a previous verification attempt has
4037 not happened, "verify = helo" does it there and then.
4039 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4041 TK/03 Fix log output including CR from clamd.
4043 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4044 exist provoked a memory error which could cause a segfault.
4046 PH/15 Installed PCRE 6.2
4048 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4050 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4051 of the problem. Specifically, suggested +O2 rather than +O1 for the
4054 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4056 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4057 record, the port was not correctly logged when the outgoing_port log
4058 selector was set (it logged the transort's default port).
4060 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4061 fallback_hosts, and "hosts" in the smtp transport.
4063 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4064 host errors such as "Connection refused".
4066 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4067 authentication with radiusclient 0.4.9:
4069 - Error returned from rc_read_config was caught wrongly
4070 - Username/password not passed on to radius server due to wrong length.
4072 The presumption is that some radiusclient API changes for 4.51/PH/17
4073 were not taken care of correctly. The code is still untested by me (my
4074 Linux distribution still has 0.3.2 of radiusclient), but it was
4075 contributed by a Radius user.
4077 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4078 expanding the "port" option of the smtp transport.
4080 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4081 while reading a MIME header. Thanks to Tom Hughes for a patch.
4083 PH/24 Include config.h inside local_scan.h so that configuration settings are
4086 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4087 that in an ACL for RCPT (for example), you can examine exactly what was
4090 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4091 commands, but it was not correctly comparing the address with the actual
4092 client host address. Thus, it would show the EHLO address in Received:
4093 header lines when this was not necessary.
4095 PH/27 Added the % operator to ${eval:}.
4097 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4098 it should be ignoring failures (because with -C, for example, it has lost
4099 privilege). It wasn't ignoring creation failures other than "already
4102 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4105 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4106 because an input line was too long, either on its own, or by virtue of
4107 too many continuations, the temporary file was not being removed, and the
4108 return code was incorrect.
4110 PH/31 Missing "BOOL" in function definition in filtertest.c.
4112 PH/32 Applied Sieve patches from the maintainer.
4114 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4116 PH/33 Added "verify = not_blind".
4118 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4119 Local/Makefile (with some defaults set). These are used in built scripts
4120 such as exicyclog, but they have never been used in the exim_install
4121 script (though there are many overriding facilities there). I have
4122 arranged that the exim_install script now takes note of these two
4125 PH/35 Installed configuration files for Dragonfly.
4127 PH/36 When a locally submitted message by a trusted user did not contain a
4128 From: header, and the sender address was obtained from -f or from an SMTP
4129 MAIL command, and the trusted user did not use -F to supply a sender
4130 name, $originator_name was incorrectly used when constructing a From:
4131 header. Furthermore, $originator_name was used for submission mode
4132 messages from external hosts without From: headers in a similar way,
4133 which is clearly wrong.
4135 PH/37 Added control=suppress_local_fixups.
4137 PH/38 When log_selector = +received_sender was set, and the addition of the
4138 sender made the log line's construction buffer exactly full, or one byte
4139 less than full, an overflow happened when the terminating "\n" was
4142 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4143 when the result of a list match is failure because a DNS lookup failed.
4145 PH/40 RM_COMMAND is now used in the building process.
4147 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4148 the "build-* directories that it finds.
4150 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4151 address in a domain literal was a prefix of an interface address.
4153 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4154 when verifying a sender address, unless rewrite_headers is false.
4156 PH/44 Wrote a long comment about why errors_to addresses are verified as
4157 recipients, not senders.
4159 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4160 the ratelimit ACL was added.
4162 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4164 PH/46 Added extra information about PostgreSQL errors to the error string.
4166 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4167 avoiding the need to install special zones in a real server. This is
4168 backwards compatible; if it can't find the fake resolver, it drops back.
4169 Thus, both old and new test suites can be run.
4171 TF/02 Added util/ratelimit.pl
4173 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4174 clock is set back in time.
4176 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4177 Candler <B.Candler@pobox.com>.
4179 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4180 OK for addresses that are the result of redirections.
4182 PH/48 A number of further additions for the benefit of the new test suite,
4183 including a fake gethostbyname() that interfaces to the fake DNS resolver
4186 TF/06 The fix for widen_domains has also been applied to qualify_single and
4187 search_parents which are the other dnslookup options that can cause
4190 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4193 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4195 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4196 service" if it encountered an MX record with an empty target hostname.
4197 The message is now "an MX or SRV record indicated no SMTP service".
4199 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4200 if the DNS of the sending site is misconfigured. This is quite a
4201 common situation. This change restores the behaviour of treating a
4202 helo verification defer as a failure.
4204 PH/51 If self=fail was set on a router, the bounce message did not include the
4205 actual error message.
4211 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4213 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4214 command itself ended in error, the underlying message about the transport
4215 filter timeout was being overwritten with the pipe command error. Now the
4216 underlying error message should be appended to the second error message.
4218 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4220 PH/02 Reduce the amount of output that "make" produces by default. Full output
4221 can still be requested.
4223 PH/03 The warning log line about a condition test deferring for a "warn" verb
4224 was being output only once per connection, rather than after each
4225 occurrence (because it was using the same function as for successful
4226 "warn" verbs). This seems wrong, so I have changed it.
4228 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4229 it should not have, which might have caused a crash in the right
4230 circumstances, but probably never did.
4232 PH/04 Installed a modified version of Tony Finch's patch to make submission
4233 mode fix the return path as well as the Sender: header line, and to
4234 add a /name= option so that you can make the user's friendly name appear
4237 TF/03 Added the control = fakedefer ACL modifier.
4239 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4240 Mark Lowes for thorough testing.
4242 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4244 TK/03 Merged latest SRS patch from Miles Wilton.
4246 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4247 with the definition in sysexits.h (which is #included earlier).
4248 Fortunately, Exim does not actually use EX_OK. The code used to try to
4249 preserve the sysexits.h value, by assuming that macro definitions were
4250 scanned for macro replacements. I have been disabused of this notion,
4251 so now the code just undefines EX_OK before #including unistd.h.
4253 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4254 in the smtp transport. When a block could not be written in a single
4255 write() function, the timeout was being re-applied to each part-write.
4256 This seems wrong - if the receiver was accepting one byte at a time it
4257 would take for ever. The timeout is now adjusted when this happens. It
4258 doesn't have to be particularly precise.
4260 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4261 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4263 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4264 without a domain if the check to <postmaster@domain> fails.
4266 SC/01 Eximstats: added -xls and the ability to specify output files
4267 (patch written by Frank Heydlauf).
4269 SC/02 Eximstats: use FileHandles for outputting results.
4271 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4273 SC/04 Eximstats: fixed display of large numbers with -nvr option
4275 SC/05 Eximstats: fixed merging of reports with empty tables.
4277 SC/06 Eximstats: added the -include_original_destination flag
4279 SC/07 Eximstats: removed tabs and trailing whitespace.
4281 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4283 TK/06 MBOX spool code: Add real "From " MBOX separator line
4284 so the .eml file is really in mbox format (even though
4285 most programs do not really care). Patch from Alex Miller.
4287 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4288 The latter is generated from $received_to and is only set if the
4289 message has one envelope recipient. SA can use these headers,
4290 obviously out-of-the-box. Patch from Alex Miller.
4292 PH/08 The ${def test on a variable was returning false if the variable's
4293 value was "0", contrary to what the specification has always said!
4294 The result should be true unless the variable is empty.
4296 PH/09 The syntax error of a character other than { following "${if
4297 def:variable_name" (after optional whitespace) was not being diagnosed.
4298 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4299 accidental colon was present, for example, could give incorrect results.
4301 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4302 result is used (not including appendfile, where other changes are about
4305 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4306 This involved changing a lot of size variables from int to off_t. It
4307 should work with maildirs and everything.
4309 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4310 spamd dying while we are connected to it.
4312 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4315 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4316 function for BDB 4.3.
4318 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4320 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4321 the sources for PCRE have been re-arranged and more files are now
4324 PH/15 The code I had for printing potentially long long variables in PH/11
4325 above was not the best (it lost precision). The length of off_t variables
4326 is now inspected at build time, and an appropriate printing format (%ld
4327 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4328 to be "long long int" or "long int". This is needed for the internal
4329 formatting function string_vformat().
4331 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4332 the configuration file to be ":syslog", then the script "guesses" where
4333 the logs files are, rather than using the compiled in default. In our
4334 case the guess is not the same as the compiled default, so the script
4335 suddenly stopped working when I started to use syslog. The patch checks
4336 to see if log_file_path is "". If so, it attempts to read it from exim
4337 with no configuration file to get the compiled in version, before it
4338 falls back to the previous guessing code."
4340 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4341 implementing BATV in an Exim configuration. See NewStuff for the gory
4344 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4345 Makefile that are specific to HP-UX.
4347 PH/18 If the "use_postmaster" option was set for a recipient callout together
4348 with the "random" option, the postmaster address was used as the MAIL
4349 FROM address for the random test, but not for the subsequent recipient
4350 test. It is now used for both.
4352 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4353 patch removes a few documentation additions to RFC 3028, because the
4354 latest draft now contains them. It adds the new en;ascii-case comparator
4355 and a new error check for 8bit text in MIME parts. Comparator and
4356 require names are now matched exactly. I enabled the subaddress
4357 extension, but it is not well tested yet (read: it works for me)."
4359 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4360 rework some of the code of TK/09 above to avoid the hardwired use of
4361 "%lld" and "long long". Replaced the call to snprintf() with a call to
4364 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4365 records point to non-existent hosts", "retry timeout exceeded", and
4366 "retry time not reached for any host after a long failure period".
4368 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4369 experimental DomainKeys support:
4371 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4372 (2) On an error such as an illegally used "control", the wrong name for
4373 the control was given.
4375 These problems did NOT occur unless DomainKeys support was compiled.
4377 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4379 PH/24 Added ${if match_ip condition.
4381 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4382 databases so that it will be absolutely obvious if a crash occurs in the
4383 DB library. This is a regular occurrence (often caused by mis-matched
4386 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4387 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4388 picked up on a user's system that detects such things. There doesn't seem
4389 to be a gcc warning option for this - only an attribute that has to be
4390 put on the function's prototype. It seems that in Fedora Core 4 they have
4391 set this on a number of new functions. No doubt there will be more in due
4394 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4395 specify a transport. However, if an address that was verified by such a
4396 router was the subject of a callout, Exim crashed because it tried to
4397 read the rcpt_include_affixes from the non-existent transport. Now it
4398 just assumes that the setting of that option is false. This bug was
4399 introduced by 4.51/PH/31.
4401 PH/28 Changed -d+all to exclude +memory, because that information is very
4402 rarely of interest, but it makes the output a lot bigger. People tend to
4403 do -d+all out of habit.
4405 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4406 code in os-type was giving problems when libc.so lives in lib64, like on
4409 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4410 aren't the modern standard, and it seems that some systems' include files
4411 don't always have them. Exim was already checking for some of the newer
4412 ones like T_AAAA, and defining it itself. I've added checks for all the
4413 record types that Exim uses.
4415 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4416 not automatically generating a new one, as it is supposed to. This
4417 prevented TLS from working. If the file did exist, but contained invalid
4418 data, a new version was generated, as expected. It was only the case of a
4419 non-existent file that was broken.
4421 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4422 with a change in libdomainkeys > 0.64.
4424 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4425 from DNS. If the selector record carries the flag, it now has
4426 precedence over the domain-wide flag.
4428 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4430 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4431 the use of a port name that isn't defined in /etc/services) occurred, the
4432 message was deferred as in a normal delivery, and thus remained on the
4433 spool, instead of being failed because of the mua_wrapper setting. This
4434 is now fixed, and I tidied up some of the mua_wrapper messages at the
4437 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4438 the messages in a hash of arrays rather than using individual hashes.
4439 This is a bit cleaner and results in dramatic memory savings, albeit
4440 at a slight CPU cost.
4442 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4443 as requested by Marc Sherman.
4445 SC/10 Eximstats: added histograms for user specified patterns as requested
4448 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4450 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4451 fopen() in the content-scanning modules that did not already have it.
4457 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4458 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4460 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4462 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4464 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4465 to test Sieve filters that use "vacation".
4467 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4468 that changes the way the GnuTLS parameters are stored in the cache file.
4469 The new format can be generated externally. For backward compatibility,
4470 if the data in the cache doesn't make sense, Exim assumes it has read an
4471 old-format file, and it generates new data and writes a new file. This
4472 means that you can't go back to an older release without removing the
4475 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4476 work if there are any delivery delays because "one_time" forces the
4477 parent to be marked "delivered", so its unseen clone is never tried
4478 again. For this reason, Exim now forbids the simultaneous setting of
4481 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4482 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4483 entry if you want to know the details. The fix, however, neglected to
4484 consider the case when local delivery batching is involved. The test for
4485 "previously delivered" was not happening when checking to see if an
4486 address could be batched with a previous (undelivered) one; under
4487 certain circumstances this could lead to multiple deliveries to the same
4490 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4491 in its include files, and this causes problems building Exim.
4493 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4494 header_syntax) but Exim was just ignoring anything given after a slash.
4495 In particular, this caused confusion with an attempt to use "verify =
4496 reverse_host_lookup/defer_ok". An error is now given when options are
4497 supplied for verify items that do not have them. (Maybe reverse_host_
4498 lookup should have a defer_ok option, but that's a different point.)
4500 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4501 defined by RFC 821) to 2048, because there were problems with some AUTH
4502 commands, and RFC 1869 says the size should be increased for extended
4503 SMTP commands that take arguments.
4505 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4508 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4509 "unknown" error; now it says that the functionality isn't in the binary.
4511 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4512 an address' error message when a string expansion fails (syntax or
4513 whatever). Otherwise the password may appear in the log. Following change
4514 PH/42 below, there is no longer a chance of it appearing in a bounce
4517 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4519 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4520 of its addresses was ever tried. (Bugzilla bug #2.)
4522 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4523 the result incorrectly in the debug output. (It correctly added a newline
4524 to what was transported.)
4526 TF/01 Added $received_time.
4528 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4529 commented out examples of how to interface to a virus scanner and to
4530 SpamAssassin. Also added commented examples of av_scanner and
4531 spamd_address settings.
4533 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4534 and controls are allowed in which ACLs. There were a couple of minor
4535 errors. Some of the entries in the conditions table (which is a table of
4536 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4537 negation of where the condition IS allowed.
4539 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4541 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4542 header file does not have a version number, so I've had to invent a new
4543 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4544 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4545 radiusclient), but it was contributed by a Radius user.
4547 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4548 files or directories, for OpenSSL.
4550 PH/19 When an Exim process that is running as root has to create an Exim log
4551 file, it does so in a subprocess that runs as exim:exim so as to get the
4552 ownership right at creation (otherwise, other Exim processes might see
4553 the file with the wrong ownership). There was no test for failure of this
4554 fork() call, which would lead to the process getting stuck as it waited
4555 for a non-existent subprocess. Forks do occasionally fail when resources
4556 run out. I reviewed all the other calls to fork(); they all seem to check
4559 PH/20 When checking for unexpected SMTP input at connect time (before writing
4560 the banner), Exim was not dealing correctly with a non-positive return
4561 from the read() function. If the client had disconnected by this time,
4562 the result was a log entry for a synchronization error with an empty
4563 string after "input=" when read() returned zero. If read() returned -1
4564 (an event I could not check), uninitialized data bytes were printed.
4565 There were reports of junk text (parts of files, etc) appearing after
4568 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4570 PH/22 Added support for macro redefinition, and (re)definition in between
4571 driver and ACL definitions.
4573 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4574 forgetting to use the resulting value; it was using the unexpanded value.
4576 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4577 hadn't been configured. The fix is from Juergen Kreileder, who
4578 understands it better than I do:
4580 "Here's what I see happening with three configured cyrus_sasl
4581 authenticators configured (plain, login, cram-md5):
4583 On startup auth_cyrus_sasl_init() gets called for each of these.
4584 This means three calls to sasl_listmech() without a specified mech_list.
4585 => SASL tests which mechs of all available mechs actually work
4586 => three warnings about OTP not working
4587 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4589 With the patch, sasl_listmech() also gets called three times. But now
4590 SASL's mech_list option is set to the server_mech specified in the the
4591 authenticator. Or in other words, the answer from sasl_listmech()
4592 gets limited to just the mech you're testing for (which is different
4594 => the return list contains just 'plain' or 'login', 'cram-md5' or
4595 nothing depending on the value of ob->server_mech.
4597 I've just tested the patch: Authentication still works fine,
4598 unavailable mechs specified in the exim configuration are still
4599 caught, and the auth.log warnings about OTP are gone."
4601 PH/25 When debugging is enabled, the contents of the command line are added
4602 to the debugging output, even when log_selector=+arguments is not
4605 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4606 answer is "GNU", and only if the return is "GNU/something" is the answer
4609 PH/27 $acl_verify_message is now set immediately after the failure of a
4610 verification in an ACL, and so is available in subsequent modifiers. In
4611 particular, the message can be preserved by coding like this:
4613 warn !verify = sender
4614 set acl_m0 = $acl_verify_message
4616 Previously, $acl_verify_message was set only while expanding "message"
4617 and "log_message" when a very denied access.
4619 PH/28 Modified OS/os.c-Linux with
4621 -#ifndef OS_LOAD_AVERAGE
4622 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4624 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4625 nomenclature these days.)
4627 PH/29 Installed patch from the Sieve maintainer that adds the options
4628 sieve_useraddress and sieve_subaddress to the redirect router.
4630 PH/30 In these circumstances:
4631 . Two addresses routed to the same list of hosts;
4632 . First host does not offer TLS;
4633 . First host accepts first address;
4634 . First host gives temporary error to second address;
4635 . Second host offers TLS and a TLS session is established;
4636 . Second host accepts second address.
4637 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4638 and peerdn, if requested) that were in fact used only for the second
4641 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4642 attention to any local part prefix or suffix that was matched by the
4643 router that accepted the address. It now behaves in the same way as it
4644 does for delivery: the affixes are removed from the local part unless
4645 rcpt_include_affixes is set on the transport.
4647 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4648 timeout during the DATA phase of an incoming message.
4650 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4651 applied a patch sanctioned by the Sieve maintainer.
4653 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4654 the uid or gid is negative. A case of a negative gid caused this to be
4655 noticed. The fix allows for either to be negative.
4657 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4658 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4661 PH/36 The change PH/12 above was broken. Fixed it.
4663 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4664 the grounds that routing the same address twice would always produce the
4665 same answer. This might have been true once, but it is certainly no
4666 longer true now. Routing a child address may depend on the previous
4667 routing that produced that child. Some complicated redirection strategies
4668 went wrong when messages had multiple recipients, and made Exim's
4669 behaviour dependent on the order in which the addresses were given.
4671 I have moved the duplicate checking until after the routing is complete.
4672 Exim scans the addresses that are assigned to local and remote
4673 transports, and removes any duplicates. This means that more work will be
4674 done, as duplicates will always all be routed, but duplicates are
4675 presumably rare, so I don't expect this is of any significance.
4677 For deliveries to pipes, files, and autoreplies, the duplicate checking
4678 still happens during the routing process, since they are not going to be
4681 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4682 It corrects a timeout issue with spamd. This is Ian's comment: "The
4683 background is that sometimes spamd either never reads data from a
4684 connection it has accepted, or it never writes response data. The exiscan
4685 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4686 blindly assumes that writes won't block so it may never time out."
4688 PH/39 Allow G after quota size as well as K and M.
4690 PH/40 The value set for $authenticated_id in an authenticator may not contain
4691 binary zeroes or newlines because the value is written to log lines and
4692 to spool files. There was no check on this. Now the value is run through
4693 the string_printing() function so that such characters are converted to
4694 printable escape sequences.
4696 PH/41 $message_linecount is a new variable that contains the total number of
4697 lines in the message. Compare $body_linecount, which is the count for the
4700 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4701 bounce and delay warning messages, except in certain special cases, which
4704 (a) An SMTP error message from a remote host;
4705 (b) A message specified in a :fail: redirection;
4706 (c) A message specified in a "fail" command in a system filter;
4707 (d) A message specified in a FAIL return from the queryprogram router;
4708 (e) A message specified by the cannot_route_message router option.
4710 In these cases only, Exim does include the error details in bounce and
4711 warning messages. There are also a few cases where bland messages such
4712 as "unrouteable address" or "local delivery error" are given.
4714 PH/43 $value is now also set for the "else" part of a ${run expansion.
4716 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4717 being worked on, but at least Exim now implements the latest version to
4720 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4721 process to complete was treated as a delivery failure, a timeout while
4722 writing the message to the pipe was logged, but erroneously treated as a
4723 successful delivery. Such timeouts include transport filter timeouts. For
4724 consistency with the overall process timeout, these timeouts are now
4725 treated as errors, giving rise to delivery failures by default. However,
4726 there is now a new Boolean option for the pipe transport called
4727 timeout_defer, which, if set TRUE, converts the failures into defers for
4728 both kinds of timeout. A transport filter timeout is now identified in
4731 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4732 systems where "make" and "gmake" are different, calling "gmake" at top
4733 level broke things. I've arranged for the value of $(MAKE) to be passed
4734 from the Makefile to this script so that it can call the same version of
4738 A note about Exim versions 4.44 and 4.50
4739 ----------------------------------------
4741 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4742 changes of various kinds. As a consequence, a big documentation update was
4743 needed. This delayed the release for rather longer than seemed good, especially
4744 in the light of a couple of (minor) security issues. Therefore, the changes
4745 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4746 release. So 4.44 and 4.50 are in effect two different branches that both start
4749 I have left the 4.50 change log unchanged; it contains all the changes since
4750 4.43. The change log for 4.44 is below; many of its items are identical to
4751 those for 4.50. This seems to be the most sensible way to preserve the
4752 historical information.
4758 1. Minor wording change to the doc/README.SIEVE file.
4760 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4761 computation of the current number of files was incorrect.
4763 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4764 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4767 4. Give more explanation in the error message when the command for a transport
4768 filter fails to execute.
4770 5. There are several places where Exim runs a non-Exim command in a
4771 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4772 was being done only for the command run by the queryprogram router. It is
4773 now done for all such subprocesses. The other cases are: ${run, transport
4774 filters, and the commands run by the lmtp and pipe transports.
4776 6. Added CONFIGURE_GROUP build-time option.
4778 7. Some older OS have a limit of 256 on the maximum number of file
4779 descriptors. Exim was using setrlimit() to set 1000 as a large value
4780 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4781 systems. I've change it so that if it can't get 1000, it tries for 256.
4783 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4784 was an oversight, and furthermore, ever since the addition of extra
4785 controls (e.g. 4.43/32), the checks on when to allow different forms of
4786 "control" were broken. There should now be diagnostics for all cases when a
4787 control that does not make sense is encountered.
4789 9. Added the /retain_sender option to "control=submission".
4791 10. $recipients is now available in the predata ACL (oversight).
4793 11. Tidy the search cache before the fork to do a delivery from a message
4794 received from the command line. Otherwise the child will trigger a lookup
4795 failure and thereby defer the delivery if it tries to use (for example) a
4796 cached ldap connection that the parent has called unbind on.
4798 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4799 of $address_data from the recipient verification was clobbered by the
4800 sender verification.
4802 13. The value of address_data from a sender verification is now available in
4803 $sender_address_data in subsequent conditions in the ACL statement.
4805 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4807 15. Added a new option "connect=<time>" to callout options, to set a different
4810 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4811 was its contents. (It was OK if the option was not defined at all.)
4813 17. A "Completed" log line is now written for messages that are removed from
4814 the spool by the -Mrm option.
4816 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4817 information about exactly what failed.
4819 19. Added -dd to debug only the daemon process.
4821 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4822 handles timeouts, both on the server side and network timeouts. Renamed the
4823 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4825 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4826 It is now set to "smtps".
4828 22. $host_address is now set to the target address during the checking of
4829 ignore_target_hosts.
4831 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4832 being passed; this would have caused $sender_host_name to have been used if
4833 matching the list had actually called for a host name (not very likely,
4834 since this list is usually IP addresses). A host name is now passed as
4837 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4838 code that specifies a non-restarting handler (typically sigaction() in
4839 modern systems) in an attempt to fix a rare and obscure crash bug.
4841 25. Narrowed the window for a race in the daemon that could cause it to ignore
4842 SIGCHLD signals. This is not a major problem, because they are used only to
4843 wake it up if nothing else does.
4845 26. A malformed maildirsize file could cause Exim to calculate negative values
4846 for the mailbox size or file count. Odd effects could occur as a result.
4847 The maildirsize information is now recalculated if the size or filecount
4850 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4851 support for a long time. Removed HAVE_SYS_VFS_H.
4853 28. Installed the latest version of exipick from John Jetmore.
4855 29. In an address list, if the pattern was not a regular expression, an empty
4856 subject address (from a bounce message) matched only if the pattern was an
4857 empty string. Non-empty patterns were not even tested. This was the wrong
4858 because it is perfectly reasonable to use an empty address as part of a
4859 database query. An empty address is now tested by patterns that are
4860 lookups. However, all the other forms of pattern expect the subject to
4861 contain a local part and a domain, and therefore, for them, an empty
4862 address still always fails if the pattern is not itself empty.
4864 30. Exim went into a mad DNS loop when attempting to do a callout where the
4865 host was specified on an smtp transport, and looking it up yielded more
4866 than one IP address.
4868 31. Re-factored the code for checking spool and log partition space into a
4869 function that finds that data and another that does the check. The former
4870 is then used to implement four new variables: $spool_space, $log_space,
4871 $spool_inodes, and $log_inodes.
4873 32. The RFC2047 encoding function was originally intended for short strings
4874 such as real names; it was not keeping to the 75-character limit for
4875 encoded words that the RFC imposes. It now respects the limit, and
4876 generates multiple encoded words if necessary. To be on the safe side, I
4877 have increased the buffer size for the ${rfc2047: expansion operator from
4880 33. It is now permitted to omit both strings after an "if" condition; if the
4881 condition is true, the result is "true". As before, when the second string
4882 is omitted, a false condition yields an empty string. This makes it less
4883 cumbersome to write custom ACL and router conditions.
4885 34. Failure to deliver a bounce message always caused it to be frozen, even if
4886 there was an errors_to setting on the router. The errors_to setting is now
4889 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4890 canonical form (fully expanded) before being placed in
4891 $sender_host_address.
4893 36. The table in the code that translates DNS record types into text (T_A to
4894 "A" for instance) was missing entries for NS and CNAME. It is just possible
4895 that this could have caused confusion if both these types were looked up
4896 for the same domain, because the text type is used as part of Exim's
4897 per-process caching. But the chance of anyone hitting this buglet seems
4900 37. The dnsdb lookup has been extended in a number of ways.
4902 (1) There is a new type, "zns", which walks up the domain tree until it
4903 finds some nameserver records. It should be used with care.
4905 (2) There is a new type, "mxh", which is like "mx" except that it returns
4906 just the host names, not the priorities.
4908 (3) It is now possible to give a list of domains (or IP addresses) to be
4909 looked up. The behaviour when one of the lookups defers can be
4910 controlled by a keyword.
4912 (4) It is now possible to specify the separator character for use when
4913 multiple records are returned.
4915 38. The dnslists ACL condition has been extended: it is now possible to supply
4916 a list of IP addresses and/or domains to be looked up in a particular DNS
4919 39. Added log_selector=+queue_time_overall.
4921 40. When running the queue in the test harness, wait just a tad after forking a
4922 delivery process, to get repeatability of debugging output.
4924 41. Include certificate and key file names in error message when GnuTLS fails
4925 to set them up, because the GnuTLS error message doesn't include the name
4926 of the failing file when there is a problem reading it.
4928 42. Allow both -bf and -bF in the same test run.
4930 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4932 44. The "Exiscan patch" is now merged into the mainline Exim source.
4934 45. Sometimes the final signoff response after QUIT could fail to get
4935 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4936 < 0 before doing a fflush(). This bug looks as though it goes back to the
4937 introduction of TLS in release 3.20, but "sometimes" must have been rare
4938 because the tests only now provoked it.
4940 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4941 (this can affect the format of dates).
4943 47. exim_tidydb, when checking for the continued existence of a message for
4944 which it has found a message-specific retry record, was not finding
4945 messages that were in split spool directories. Consequently, it was
4946 deleting retry records that should have stayed in existence.
4948 48. Steve fixed some bugs in eximstats.
4950 49. The SPA authentication driver was not abandoning authentication and moving
4951 on to the next authenticator when an expansion was forced to fail,
4952 contradicting the general specification for all authenticators. Instead it
4953 was generating a temporary error. It now behaves as specified.
4955 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4956 (the order specifies the preference for clients). The order is now AES256,
4957 AES128, 3DES, ARCFOUR128.
4959 51. Small patch to Sieve code - explicitly set From: when generating an
4962 52. Exim crashed if a remote delivery caused a very long error message to be
4963 recorded - for instance if somebody sent an entire SpamAssassin report back
4964 as a large number of 550 error lines. This bug was coincidentally fixed by
4965 increasing the size of one of Exim's internal buffers (big_buffer) that
4966 happened as part of the Exiscan merge. However, to be on the safe side, I
4967 have made the code more robust (and fixed the comments that describe what
4970 53. Now that there can be additional text after "Completed" in log lines (if
4971 the queue_time_overall log selector is set), a one-byte patch to exigrep
4972 was needed to allow it to recognize "Completed" as not the last thing in
4975 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4976 patch that reportedly fixes this has been added. I am not expert enough to
4977 create a test for it. This is what the patch creator wrote:
4979 "I found a little strange behaviour of ldap code when working with
4980 Windows 2003 AD Domain, where users was placed in more than one
4981 Organization Units. When I tried to give exim partial DN, the exit code
4982 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4983 But simultaneously result of request was absolutely normal ldap result,
4984 so I produce this patch..."
4986 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4987 REFERENCE, so I have modified the code to exclude the patch when that macro
4990 55. Some experimental protocols are using DNS PTR records for new purposes. The
4991 keys for these records are domain names, not reversed IP addresses. The
4992 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4993 leaves it alone. Component reversal etc. now happens only for IP addresses.
4996 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4998 57. Double the size of the debug message buffer (to 2048) so that more of very
4999 long debug lines gets shown.
5001 58. The exicyclog utility now does better if the number of log files to keep
5002 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5004 59. Two changes related to the smtp_active_hostname option:
5006 (1) $smtp_active_hostname is now available as a variable.
5007 (2) The default for smtp_banner uses $smtp_active_hostname instead
5008 of $primary_hostname.
5010 60. The host_aton() function is supposed to be passed a string that is known
5011 to be a valid IP address. However, in the case of IPv6 addresses, it was
5012 not checking this. This is a hostage to fortune. Exim now panics and dies
5013 if the condition is not met. A case was found where this could be provoked
5014 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5015 components; fortuitously, this particular loophole had already been fixed
5016 by change 4.50/55 above.
5018 If there are any other similar loopholes, the new check in host_aton()
5019 itself should stop them being exploited. The report I received stated that
5020 data on the command line could provoke the exploit when Exim was running as
5021 exim, but did not say which command line option was involved. All I could
5022 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5023 running as the user.
5026 61. There was a buffer overflow vulnerability in the SPA authentication code
5027 (which came originally from the Samba project). I have added a test to the
5028 spa_base64_to_bits() function which I hope fixes it.
5031 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5032 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5034 63. The daemon start-up calls getloadavg() while still root for those OS that
5035 need the first call to be done as root, but it missed one case: when
5036 deliver_queue_load_max is set with deliver_drop_privilege. This is
5037 necessary for the benefit of the queue runner, because there is no re-exec
5038 when deliver_drop_privilege is set.
5040 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5041 This has been fixed.
5043 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5044 was in use, was not putting the data itself into the right store pool;
5045 consequently, it could be overwritten for a subsequent message in the same
5046 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5049 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5051 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5052 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5053 the function were treating the return as a boolean value, which happened to
5054 work because 0=false and not-0=true, but is not correct code.
5056 68. The host_aton() function was not handling scoped IPv6 addresses (those
5057 with, for example, "%eth0" on the end) correctly.
5059 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5060 negated items (that is, ~something) in unsigned ints. Some compilers
5061 apparently mutter when there is no cast.
5063 70. If an address verification called from an ACL failed, and did not produce a
5064 user-specific message (i.e. there was only a "system" message), nothing was
5065 put in $acl_verify_message. In this situation, it now puts the system
5068 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5069 session; change 4.31/43 added the unwanted input to the log line - except
5070 that it did not do this in the start of session case. It now does.
5072 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5073 This is wrong and can cause the other end to generate a synchronization
5074 error if it is another Exim or anything else that does the synchronization
5075 check. A QUIT command is no longer sent after a timeout.
5077 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5078 during host lookups.
5080 74. The defer_ok option of callout verification was not working if it was used
5081 when verifying addresses in header lines, that is, for this case:
5083 verify = header_sender/callout=defer_ok
5085 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5086 those file descriptors could be used for SMTP connections. If anything
5087 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5088 could be sent to the SMTP client, causing chaos. The daemon now opens
5089 stdin, stdout, and stderr to /dev/null when it puts itself into the
5092 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5093 log by default. The user can override this with suitable Perl magic.
5095 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5096 the log message when discard triggers, was not working for the DATA ACL or
5097 for the non-SMTP ACL.
5099 78. Error message wording change in sieve.c.
5101 79. If smtp_accept_max_per_host was set, the number of connections could be
5102 restricted to fewer than expected, because the daemon was trying to set up
5103 a new connection before checking whether the processes handling previous
5104 connections had finished. The check for completed processes is now done
5105 earlier. On busy systems, this bug wouldn't be noticed because something
5106 else would have woken the daemon, and it would have reaped the completed
5109 80. If a message was submitted locally by a user whose login name contained one
5110 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5111 It caused a spool format error. I have fixed the spool reading code. A
5112 related problem was that the "from" clause in the Received: line became
5113 illegal because of the space(s). It is now covered by ${quote_local_part.
5115 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5118 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5120 83. Patch from Sieve maintainer to fix unterminated string problem in
5121 "vacation" handling.
5123 84. Some minor changes to the Linux configuration files to help with other
5124 OS variants using glibc.
5126 85. One more patch for Sieve to update vacation handling to latest spec.
5129 ----------------------------------------------------
5130 See the note above about the 4.44 and 4.50 releases.
5131 ----------------------------------------------------
5137 1. Change 4.43/35 introduced a bug that caused file counts to be
5138 incorrectly computed when quota_filecount was set in an appendfile
5141 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5142 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5145 3. Give more explanation in the error message when the command for a transport
5146 filter fails to execute.
5148 4. There are several places where Exim runs a non-Exim command in a
5149 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5150 was being done only for the command run by the queryprogram router. It is
5151 now done for all such subprocesses. The other cases are: ${run, transport
5152 filters, and the commands run by the lmtp and pipe transports.
5154 5. Some older OS have a limit of 256 on the maximum number of file
5155 descriptors. Exim was using setrlimit() to set 1000 as a large value
5156 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5157 systems. I've change it so that if it can't get 1000, it tries for 256.
5159 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5160 was an oversight, and furthermore, ever since the addition of extra
5161 controls (e.g. 4.43/32), the checks on when to allow different forms of
5162 "control" were broken. There should now be diagnostics for all cases when a
5163 control that does not make sense is encountered.
5165 7. $recipients is now available in the predata ACL (oversight).
5167 8. Tidy the search cache before the fork to do a delivery from a message
5168 received from the command line. Otherwise the child will trigger a lookup
5169 failure and thereby defer the delivery if it tries to use (for example) a
5170 cached ldap connection that the parent has called unbind on.
5172 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5173 of $address_data from the recipient verification was clobbered by the
5174 sender verification.
5176 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5177 was its contents. (It was OK if the option was not defined at all.)
5179 11. A "Completed" log line is now written for messages that are removed from
5180 the spool by the -Mrm option.
5182 12. $host_address is now set to the target address during the checking of
5183 ignore_target_hosts.
5185 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5186 being passed; this would have caused $sender_host_name to have been used if
5187 matching the list had actually called for a host name (not very likely,
5188 since this list is usually IP addresses). A host name is now passed as
5191 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5192 code that specifies a non-restarting handler (typically sigaction() in
5193 modern systems) in an attempt to fix a rare and obscure crash bug.
5195 15. Narrowed the window for a race in the daemon that could cause it to ignore
5196 SIGCHLD signals. This is not a major problem, because they are used only to
5197 wake it up if nothing else does.
5199 16. A malformed maildirsize file could cause Exim to calculate negative values
5200 for the mailbox size or file count. Odd effects could occur as a result.
5201 The maildirsize information is now recalculated if the size or filecount
5204 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5205 support for a long time. Removed HAVE_SYS_VFS_H.
5207 18. Updated exipick to current release from John Jetmore.
5209 19. Allow an empty sender to be matched against a lookup in an address list.
5210 Previously the only cases considered were a regular expression, or an
5213 20. Exim went into a mad DNS lookup loop when doing a callout where the
5214 host was specified on the transport, if the DNS lookup yielded more than
5217 21. The RFC2047 encoding function was originally intended for short strings
5218 such as real names; it was not keeping to the 75-character limit for
5219 encoded words that the RFC imposes. It now respects the limit, and
5220 generates multiple encoded words if necessary. To be on the safe side, I
5221 have increased the buffer size for the ${rfc2047: expansion operator from
5224 22. Failure to deliver a bounce message always caused it to be frozen, even if
5225 there was an errors_to setting on the router. The errors_to setting is now
5228 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5229 canonical form (fully expanded) before being placed in
5230 $sender_host_address.
5232 24. Updated eximstats to version 1.33
5234 25. Include certificate and key file names in error message when GnuTLS fails
5235 to set them up, because the GnuTLS error message doesn't include the name
5236 of the failing file when there is a problem reading it.
5238 26. Expand error message when OpenSSL has problems setting up cert/key files.
5241 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5242 (this can affect the format of dates).
5244 28. exim_tidydb, when checking for the continued existence of a message for
5245 which it has found a message-specific retry record, was not finding
5246 messages that were in split spool directories. Consequently, it was
5247 deleting retry records that should have stayed in existence.
5249 29. eximstats updated to version 1.35
5250 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5251 1.35 - bugfix such that pie charts by volume are generated correctly
5253 30. The SPA authentication driver was not abandoning authentication and moving
5254 on to the next authenticator when an expansion was forced to fail,
5255 contradicting the general specification for all authenticators. Instead it
5256 was generating a temporary error. It now behaves as specified.
5258 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5259 (the order specifies the preference for clients). The order is now AES256,
5260 AES128, 3DES, ARCFOUR128.
5262 31. Small patch to Sieve code - explicitly set From: when generating an
5265 32. Exim crashed if a remote delivery caused a very long error message to be
5266 recorded - for instance if somebody sent an entire SpamAssassin report back
5267 as a large number of 550 error lines. This bug was coincidentally fixed by
5268 increasing the size of one of Exim's internal buffers (big_buffer) that
5269 happened as part of the Exiscan merge. However, to be on the safe side, I
5270 have made the code more robust (and fixed the comments that describe what
5273 33. Some experimental protocols are using DNS PTR records for new purposes. The
5274 keys for these records are domain names, not reversed IP addresses. The
5275 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5276 leaves it alone. Component reversal etc. now happens only for IP addresses.
5279 34. The host_aton() function is supposed to be passed a string that is known
5280 to be a valid IP address. However, in the case of IPv6 addresses, it was
5281 not checking this. This is a hostage to fortune. Exim now panics and dies
5282 if the condition is not met. A case was found where this could be provoked
5283 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5284 components; fortuitously, this particular loophole had already been fixed
5285 by change 4.50/55 or 4.44/33 above.
5287 If there are any other similar loopholes, the new check in host_aton()
5288 itself should stop them being exploited. The report I received stated that
5289 data on the command line could provoke the exploit when Exim was running as
5290 exim, but did not say which command line option was involved. All I could
5291 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5292 running as the user.
5295 35. There was a buffer overflow vulnerability in the SPA authentication code
5296 (which came originally from the Samba project). I have added a test to the
5297 spa_base64_to_bits() function which I hope fixes it.
5300 36. The daemon start-up calls getloadavg() while still root for those OS that
5301 need the first call to be done as root, but it missed one case: when
5302 deliver_queue_load_max is set with deliver_drop_privilege. This is
5303 necessary for the benefit of the queue runner, because there is no re-exec
5304 when deliver_drop_privilege is set.
5306 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5307 was in use, was not putting the data itself into the right store pool;
5308 consequently, it could be overwritten for a subsequent message in the same
5309 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5312 38. Sometimes the final signoff response after QUIT could fail to get
5313 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5314 < 0 before doing a fflush(). This bug looks as though it goes back to the
5315 introduction of TLS in release 3.20, but "sometimes" must have been rare
5316 because the tests only now provoked it.
5322 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5323 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5324 Now it returns an integer. A number of calls were still expecting a T/F
5325 return. Fortuitously, in all cases, the tests worked in OK situations,
5326 which is the norm. However, things would have gone wrong on any write
5327 failures on the smtp file descriptor. This function is used when sending
5328 messages over SMTP and also when doing verify callouts.
5330 2. When Exim is called to do synchronous delivery of a locally submitted
5331 message (the -odf or -odi options), it no longer closes stderr before doing
5334 3. Implemented the mua_wrapper option.
5336 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5338 5. Implemented the functions header_remove(), header_testname(),
5339 header_add_at_position(), and receive_remove_recipient(), and exported them
5342 6. If an ACL "warn" statement specified the addition of headers, Exim already
5343 inserted X-ACL-Warn: at the start if there was no header name. However, it
5344 was not making this test for the second and subsequent header lines if
5345 there were newlines in the string. This meant that an invalid header could
5346 be inserted if Exim was badly configured.
5348 7. Allow an ACL "warn" statement to add header lines at the start or after all
5349 the Received: headers, as well as at the end.
5351 8. Added the rcpt_4xx retry error code.
5353 9. Added postmaster_mailfrom=xxx to callout verification option.
5355 10. Added mailfrom=xxxx to the callout verification option, for verify=
5358 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5359 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5361 12. Inserted some casts to stop certain compilers warning when using pointer
5362 differences as field lengths or precisions in printf-type calls (mostly
5363 affecting debugging statements).
5365 13. Added optional readline() support for -be (dynamically loaded).
5367 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5368 same clock tick as a message's arrival, so that its received time was the
5369 same as the "first fail" time on the retry record, and that message
5370 remained on the queue past the ultimate address timeout, every queue runner
5371 would try a delivery (because it was past the ultimate address timeout) but
5372 after another failure, the ultimate address timeout, which should have then
5373 bounced the address, did not kick in. This was a "< instead of <=" error;
5374 in most cases the first failure would have been in the next clock tick
5375 after the received time, and all would be well.
5377 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5378 being recognized when the domain list was tested by the match_domain
5379 condition in an expansion string.
5381 16. Added the ${str2b64: operator.
5383 17. Exim was always calling setrlimit() to set a large limit for the number of
5384 processes, without checking whether the existing limit was already
5385 adequate. (It did check for the limit on file descriptors.) Furthermore,
5386 errors from getrlimit() and setrlimit() were being ignored. Now they are
5387 logged to the main and panic logs, but Exim does carry on, to try to do its
5388 job under whatever limits there are.
5390 18. Imported PCRE 5.0.
5392 19. Trivial typo in log message " temporarily refused connection" (the leading
5395 20. If the log selector return_path_on_delivery was set and an address was
5396 redirected to /dev/null, the delivery process crashed because it assumed
5397 that a return path would always be set for a "successful" delivery. In this
5398 case, the whole delivery is bypassed as an optimization, and therefore no
5401 21. Internal re-arrangement: the function for sending a challenge and reading
5402 a response while authentication was assuming a zero-terminated challenge
5403 string. It's now changed to take a pointer and a length, to allow for
5404 binary data in such strings.
5406 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5408 23. Exim was not respecting finduser_retries when seeking the login of the
5409 uid under which it was called; it was always trying 10 times. (The default
5410 setting of finduser_retries is zero.) Also, it was sleeping after the final
5411 failure, which is pointless.
5413 24. Implemented tls_on_connect_ports.
5415 25. Implemented acl_smtp_predata.
5417 26. If the domain in control=submission is set empty, Exim assumes that the
5418 authenticated id is a complete email address when it generates From: or
5419 Sender: header lines.
5421 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5422 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5423 chown and chgrp in /bin and hostname in /usr/bin.
5425 28. Exim was keeping the "process log" file open after each use, just as it
5426 does for the main log. This opens the possibility of it remaining open for
5427 long periods when the USR1 signal hits a daemon. Occasional processlog
5428 errors were reported, that could have been caused by this. Anyway, it seems
5429 much more sensible not to leave this file open at all, so that is what now
5432 29. The long-running daemon process does not normally write to the log once it
5433 has entered its main loop, and it closes the log before doing so. This is
5434 so that log files can straightforwardly be renamed and moved. However,
5435 there are a couple of unusual error situations where the daemon does write
5436 log entries, and I had neglected to close the log afterwards.
5438 30. The text of an SMTP error response that was received during a remote
5439 delivery was being truncated at 512 bytes. This is too short for some of
5440 the long messages that one sometimes sees. I've increased the limit to
5443 31. It is now possible to make retry rules that apply only when a message has a
5444 specific sender, in particular, an empty sender.
5446 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5447 it possible to be selective about when SMTP synchronization is enforced.
5449 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5451 32. Implemented hosts_connection_nolog.
5453 33. Added an ACL for QUIT.
5455 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5458 35. Added mailbox_size and mailbox_filecount to appendfile.
5460 36. Added control = no_multiline_responses to ACLs.
5462 37. There was a bug in the logic of the code that waits for the clock to tick
5463 in the case where the clock went backwards by a substantial amount such
5464 that the microsecond fraction of "now" was more than the microsecond
5465 fraction of "then" (but the whole seconds number was less).
5467 38. Added support for the libradius Radius client library this is found on
5468 FreeBSD (previously only the radiusclient library was supported).
5474 1. When certain lookups returned multiple values in the form name=value, the
5475 quoting of the values was not always being done properly. Specifically:
5476 (a) If the value started with a double quote, but contained no whitespace,
5478 (b) If the value contained whitespace other than a space character (i.e.
5479 tabs or newlines or carriage returns) it was not quoted.
5480 This fix has been applied to the mysql and pgsql lookups by writing a
5481 separate quoting function and calling it from the lookup code. The fix
5482 should probably also be applied to nisplus, ibase and oracle lookups, but
5483 since I cannot test any of those, I have not disturbed their existing code.
5485 2. A hit in the callout cache for a specific address caused a log line with no
5486 reason for rejecting RCPT. Now it says "Previous (cached) callout
5487 verification failure".
5489 3. There was an off-by-one bug in the queryprogram router. An over-long
5490 return line was truncated at 256 instead of 255 characters, thereby
5491 overflowing its buffer with the terminating zero. As well as fixing this, I
5492 have increased the buffer size to 1024 (and made a note to document this).
5494 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5495 when Exim is waiting for an SMTP response from a remote server, Exim
5496 restarts its select() call on the socket, thereby resetting its timeout.
5497 This is not a problem when such interrupts are rare. Somebody set up a cron
5498 job to run exiwhat every 2 minutes, which is less than the normal select()
5499 timeout (5 or 10 minutes). This meant that the select() timeout never
5500 kicked in because it was always reset. I have fixed this by comparing the
5501 time when an interrupt arrives with the time at the start of the first call
5502 to select(). If more time than the timeout has elapsed, the interrupt is
5503 treated as a timeout.
5505 5. Some internal re-factoring in preparation for the addition of Sieve
5506 extensions (by MH). In particular, the "personal" test is moved to a
5507 separate function, and given an option for scanning Cc: and Bcc: (which is
5508 not set for Exim filters).
5510 6. When Exim created an email address using the login of the caller as the
5511 local part (e.g. when creating a From: or Sender: header line), it was not
5512 quoting the local part when it contained special characters such as @.
5514 7. Installed new OpenBSD configuration files.
5516 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5517 try to make them clearer.
5519 9. Callout options, other than the timeout value, were being ignored when
5520 verifying sender addresses in header lines. For example, when using
5522 verify = header_sender/callout=no_cache
5524 the cache was (incorrectly) being used.
5526 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5527 only the Cygwin environment.
5529 11. When return_path_on_delivery was set as a log selector, if different remote
5530 addresses in the same message used different return paths and parallel
5531 remote delivery occurred, the wrong values would sometimes be logged.
5532 (Whenever a remote delivery process finished, the return path value from
5533 the most recently started remote delivery process was logged.)
5535 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5536 lines when AUTH and/or TLS are in use. This is the "received protocol"
5537 field. Exim used to use "asmtp" for authenticated SMTP, without any
5538 indication (in the protocol name) for TLS use. Now it follows the RFC and
5539 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5540 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5541 names appear in log lines as well as in Received: header lines.
5543 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5544 extensions, and comparison tests, and to fix some bugs.
5546 14. Changes to the "personal" filter test:
5548 (1) The test was buggy in that it was just doing the equivalent of
5549 "contains" tests on header lines. For example, if a user's address was
5550 anne@some.where, the "personal" test would incorrectly be true for
5552 To: susanne@some.where
5554 This test is now done by extracting each address from the header in turn,
5555 and checking the entire address. Other tests that are part of "personal"
5556 are now done using regular expressions (for example, to check local parts
5557 of addresses in From: header lines).
5559 (2) The list of non-personal local parts in From: addresses has been
5560 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5561 taken from the Sieve specification recommendations.
5563 (3) If the message contains any header line starting with "List-" it is
5564 treated as non-personal.
5566 (4) The test for "circular" in the Subject: header line has been removed
5567 because it now seems ill-conceived.
5569 15. Minor typos in src/EDITME comments corrected.
5571 16. Installed latest exipick from John Jetmore.
5573 17. If headers_add on a router specified a text string that was too long for
5574 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5575 of string_sprintf() is now avoided.
5577 18. $message_body_size was not set (it was always zero) when running the DATA
5578 ACL and the local_scan() function.
5580 19. For the "mail" command in an Exim filter, no default was being set for
5581 the once_repeat time, causing a random time value to be used if "once" was
5582 specified. (If the value happened to be <= 0, no repeat happened.) The
5583 default is now 0s, meaning "never repeat". The "vacation" command was OK
5584 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5585 (I found it when inspecting the code).
5587 20. There is now an overall timeout for performing a callout verification. It
5588 defaults to 4 times the callout timeout, which applies to individual SMTP
5589 commands during the callout. The overall timeout applies when there is more
5590 than one host that can be tried. The timeout is checked before trying the
5591 next host. This prevents very long delays if there are a large number of
5592 hosts and all are timing out (e.g. when the network connections are timing
5593 out). The value of the overall timeout can be changed by specifying an
5594 additional sub-option for "callout", called "maxwait". For example:
5596 verify = sender/callout=5s,maxwait=20s
5598 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5599 to the end before writing, but this should make it even safer).
5601 22. Exim was forgetting that it had advertised PIPELINING for the second and
5602 subsequent messages on an SMTP connection. It was also not resetting its
5603 memory on STARTTLS and an internal HELO.
5605 23. When Exim logs an SMTP synchronization error within a session, it now
5606 records whether PIPELINING has been advertised or not.
5608 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5609 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5610 rather than long int.
5612 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5614 26. Added the never_mail option to autoreply.
5620 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5621 crash if the getsockname() call failed; this can happen if a connection is
5622 closed very soon after it is established. The problem was simply in the
5623 order in which certain operations were done, causing Exim to try to write
5624 to the SMTP stream before it had set up the file descriptor. The bug has
5625 been fixed by making things happen in the correct order.
5631 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5632 before the connection was closed, thus losing the rejection response.
5634 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5635 some early Solaris releases, but causes trouble in current releases where
5636 socklen_t is defined.
5638 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5641 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5644 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5645 that releasing the top of it at the end releases what was used for sub-
5646 expansions (unless the block got too big). However, discard this block if
5647 the first thing is a variable or header, so that we can use its block when
5648 it is dynamic (useful for very large $message_headers, for example).
5650 6. Lookups now cache *every* query, not just the most recent. A new, separate
5651 store pool is used for this. It can be recovered when all lookup caches are
5652 flushed. Lookups now release memory at the end of their result strings.
5653 This has involved some general refactoring of the lookup sources.
5655 7. Some code has been added to the store_xxx() functions to reduce the amount
5656 of flapping under certain conditions.
5658 8. log_incoming_interface used to affect only the <= reception log lines. Now
5659 it causes the local interface and port to be added to several more SMTP log
5660 lines, for example "SMTP connection from", and rejection lines.
5662 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5664 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5666 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5667 could be overwritten at the end of the current message (or the start of a
5668 new message if it was set in a HELO ACL). The value is now preserved for
5669 the duration of the SMTP connection.
5671 12. If a transport had a headers_rewrite setting, and a matching header line
5672 contained an unqualified address, that address was qualified, even if it
5673 did not match any rewriting rules. The underlying bug was that the values
5674 of the flags that permit the existence of unqualified sender and recipient
5675 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5676 non-local messages, and by -bnq for local messages) were not being
5677 preserved with the message after it was received.
5679 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5680 "next input=" as part of the text comprising the host identity instead of
5681 the correct text. The code was using the same buffer for two different
5682 strings. However, depending on which order the printing function evaluated
5683 its arguments, the bug did not always show up. Under Linux, for example, my
5684 test suite worked just fine.
5686 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5687 doesn't work with some older versions of Perl. It has been changed to "my",
5688 which in any case is probably the better facility to use.
5690 15. A really picky compiler found some instances of statements for creating
5691 error messages that either had too many or two few arguments for the format
5694 16. The size of the buffer for calls to the DNS resolver has been increased
5695 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5696 for addresses that have a lot of PTR records. This alleviates a problem; it
5697 does not fully solve it.
5699 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5700 buffer now truncates the list and logs the incident, which is the same
5701 action as happens when Exim is looking up a host name and its aliases.
5702 Previously in this situation something unpredictable would happen;
5703 sometimes it was "internal error: store_reset failed".
5705 18. If a server dropped the connection unexpectedly when an Exim client was
5706 using GnuTLS and trying to read a response, the client delivery process
5707 crashed while trying to generate an error log message.
5709 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5710 string, for example:
5712 warn message = H1: something\nH2: something
5714 the text was added as a single header line from Exim's point of view
5715 though it ended up OK in the delivered message. However, searching for the
5716 second and subsequent header lines using $h_h2: did not work. This has been
5717 fixed. Similarly, if a system filter added multiple headers in this way,
5718 the routers could not see them.
5720 20. Expanded the error message when iplsearch is called with an invalid key to
5721 suggest using net-iplsearch in a host list.
5723 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5724 ACLs are no longer actually imposed (and a message to that effect is
5727 22. If a "gecos" field in a passwd entry contained escaped characters, in
5728 particular, if it contained a \" sequence, Exim got it wrong when building
5729 a From: or a Sender: header from that name. A second bug also caused
5730 incorrect handling when an unquoted " was present following a character
5731 that needed quoting.
5733 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5734 was not being matched caselessly.
5736 24. Arranged for all hyphens in the exim.8 source to be escaped with
5739 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5740 properly. Recipient callout cache records were still being keyed to include
5741 the sender, even when use_sender was set false. This led to far more
5742 callouts that were necessary. The sender is no longer included in the key
5743 when use_sender is false.
5745 26. Added "control = submission" modifier to ACLs.
5747 27. Added the ${base62d: operator to decode base 62 numbers.
5749 28. dnsdb lookups can now access SRV records.
5751 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5752 the configuration file.
5754 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5755 (-v) mode. This makes the output for a verbose queue run more intelligible.
5757 31. Added a use_postmaster feature to recipient callouts.
5759 32. Added the $body_zerocount variable, containing the number of binary zero
5760 bytes in the message body.
5762 33. The time of last modification of the "new" subdirectory is now used as the
5763 "mailbox time last read" when there is a quota error for a maildir
5766 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5768 35. Added +ignore_unknown as a special item in host lists.
5770 36. Code for decoding IPv6 addresses in host lists is now included, even if
5771 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5772 address was recognized as an IP address, but was then not correctly decoded
5773 into binary, causing unexpected and incorrect effects when compared with
5780 1. Very minor rewording of debugging text in manualroute to say "list of
5781 hosts" instead of "hostlist".
5783 2. If verify=header_syntax was set, and a header line with an unqualified
5784 address (no domain) and a large number of spaces between the end of the
5785 name and the colon was received, the reception process suffered a buffer
5786 overflow, and (when I tested it) crashed. This was caused by some obsolete
5787 code that should have been removed. The fix is to remove it!
5789 3. When running in the test harness, delay a bit after writing a bounce
5790 message to get a bit more predictability in the log output.
5792 4. Added a call to search_tidyup() just before forking a reception process. In
5793 theory, someone could use a lookup in the expansion of smtp_accept_max_
5794 per_host which, without the tidyup, could leave open a database connection.
5796 5. Added the variables $recipient_data and $sender_data which get set from a
5797 lookup success in an ACL "recipients" or "senders" condition, or a router
5798 "senders" option, similar to $domain_data and $local_part_data.
5800 6. Moved the writing of debug_print from before to after the "senders" test
5803 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5804 problems for message scanning, either using a data ACL, or using
5805 local_scan() because the Received: header was not generated till after they
5806 were called (in order to set the time as the time of reception completion).
5807 I have revised the way this works. The header is now generated after the
5808 body is received, but before the ACL or local_scan() are called. After they
5809 are run, the timestamp in the header is updated.
5815 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5816 before starting a queue runner without re-exec. This happened only when
5817 deliver_drop_privilege was set or when the Exim user was set to root. The
5818 effect of the bug was that timeouts during subsequent deliveries caused
5819 crashes instead of being properly handled. The handler is now left at its
5820 default (and expected) setting.
5822 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5823 message, again when deliver_drop_privilege is set or Exim is run as root.
5824 The bug described in (1) was not present in this case, but the tidying up
5825 of the other signals was missing. I have made the two cases consistent.
5827 3. The ignore_target_hosts setting on a manualroute router was being ignored
5828 for hosts that were looked up using the /MX notation.
5830 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5833 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5834 operated on the sender address. After changing the $sender_address to <>
5835 for the sender address verify, Exim was re-instated it as the original
5836 (before rewriting) address, but remembering that it had rewritten it, so it
5837 wasn't rewriting it again. This bug also had the effect of breaking the
5838 sender address verification caching when the sender address was rewritten.
5840 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5841 This has been changed so that if the ip literal address matches
5842 ignore_target_hosts, the router declines.
5844 7. Added expansion conditions match_domain, match_address, and match_local_
5845 part (NOT match_host).
5847 8. The placeholder for the Received: header didn't have a length field set.
5849 9. Added code to Exim itself and to exim_lock to test for a specific race
5850 condition that could lead to file corruption when using MBX delivery. The
5851 issue is with the lockfile that is created in /tmp. If this file is removed
5852 after a process has opened it but before that process has acquired a lock,
5853 there is the potential for a second process to recreate the file and also
5854 acquire a lock. This could lead to two Exim processes writing to the file
5855 at the same time. The added code performs the same test as UW imapd; it
5856 checks after acquiring the lock that its file descriptor still refers to
5857 the same named file.
5859 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5860 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5863 11. Added the smtp_active_hostname option. If used, this will typically be made
5864 to depend on the incoming interface address. Because $interface_address is
5865 not set up until the daemon has forked a reception process, error responses
5866 that can happen earlier (such as "too many connections") no longer contain
5869 12. If an expansion in a condition on a "warn" statement fails because a lookup
5870 defers, the "warn" statement is abandoned, and the next ACL statement is
5871 processed. Previously this caused the whole ACL to be aborted.
5873 13. Added the iplsearch lookup type.
5875 14. Added ident_timeout as a log selector.
5877 15. Added tls_certificate_verified as a log selector.
5879 16. Added a global option tls_require_ciphers (compare the smtp transport
5880 option of the same name). This controls incoming TLS connections.
5882 17. I finally figured out how to make tls_require_ciphers do a similar thing
5883 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5884 before starting the TLS session.
5886 18. Tabs are now shown as \t in -bP output.
5888 19. If the log selector return_path_on_delivery was set, Exim crashed when
5889 bouncing a message because it had too many Received: header lines.
5891 20. If two routers both had headers_remove settings, and the first one included
5892 a superfluous trailing colon, the final name in the first list and the
5893 first name in the second list were incorrectly joined into one item (with a
5894 colon in the middle).
5900 1. Added -C and -D options to the exinext utility, mainly to make it easier
5901 to include in the automated testing, but these could be helpful when
5902 multiple configurations are in use.
5904 2. The exinext utility was not formatting the output nicely when there was
5905 an alternate port involved in the retry record key, nor when there was a
5906 message id as well (for retries that were specific to a specific message
5907 and a specific host). It was also confused by IPv6 addresses, because of
5908 the additional colons they contain. I have fixed the IPv4 problem, and
5909 patched it up to do a reasonable job for IPv6.
5911 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5912 delivery, the log line now contains "pipelined" if PIPELINING was used.
5914 4. An SMTP transport process used to panic and die if the bind() call to set
5915 an explicit outgoing interface failed. This has been changed; it is now
5916 treated in the same way as a connect() failure.
5918 5. A reference to $sender_host_name in the part of a conditional expansion
5919 that was being skipped was still causing a DNS lookup. This no longer
5922 6. The def: expansion condition was not recognizing references to header lines
5923 that used bh_ and bheader_.
5925 7. Added the _cache feature to named lists.
5927 8. The code for checking quota_filecount in the appendfile transport was
5928 allowing one more file than it should have been.
5930 9. For compatibility with Sendmail, the command line option
5938 and sets the incoming protocol and host name (for trusted callers). The
5939 host name and its colon can be omitted when only the protocol is to be set.
5940 Note the Exim already has two private options, -pd and -ps, that refer to
5941 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5942 "s", but I don't think that's a major issue.
5944 10. A number of refactoring changes to the code, none of which should affect
5947 (a) The number of logging options was getting close to filling up the
5948 32-bit word that was used as a bit map. I have split them into two classes:
5949 those that are passed in the argument to log_write(), and those that are
5950 only ever tested independently outside of that function. These are now in
5951 separate 32-bit words, so there is plenty of room for expansion again.
5952 There is no change in the user interface or the logging behaviour.
5954 (b) When building, for example, log lines, the code previously used a
5955 macro that called string_cat() twice, in order to add two strings. This is
5956 not really sufficiently general. Furthermore, there was one instance where
5957 it was actually wrong because one of the argument was used twice, and in
5958 one call a function was used. (As it happened, calling the function twice
5959 did not affect the overall behaviour.) The macro has been replaced by a
5960 function that can join an arbitrary number of extra strings onto a growing
5963 (c) The code for expansion conditions now uses a table and a binary chop
5964 instead of a serial search (which was left over from when there were very
5965 few conditions). Also, it now recognizes conditions like "pam" even when
5966 the relevant support is not compiled in: a suitably worded error message is
5967 given if an attempt is made to use such a condition.
5969 11. Added ${time_interval:xxxxx}.
5971 12. A bug was causing one of the ddress fields not to be passed back correctly
5972 from remote delivery subprocesses. The field in question was not being
5973 subsequently used, so this caused to problems in practice.
5975 13. Added new log selectors queue_time and deliver_time.
5977 14. Might have fixed a bug in maildirsizefile handling that threw up
5978 "unexpected character" debug warnings, and recalculated the data
5979 unnecessarily. In any case, I expanded the warning message to give more
5982 15. Added the message "Restricted characters in address" to the statements in
5983 the default ACL that block characters like @ and % in local parts.
5985 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5986 Three changes have been made:
5988 (a) There was a serious bug; a negative response to MAIL caused the whole
5989 recipient domain to be cached as invalid, thereby blocking all messages
5990 to all local parts at the same domain, from all senders. This bug has
5991 been fixed. The domain is no longer cached after a negative response to
5992 MAIL if the sender used is not empty.
5994 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5997 (c) A new callout option, "use_sender" has been added for people who want
5998 the modified behaviour.
6004 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6007 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6008 indeed breaks things for older releases.
6010 3. Added additional logging to the case where there is a problem reading data
6011 from a filter that is running in a subprocess using a pipe, in order to
6012 try to track down a specific problem.
6014 4. Testing facility fudge: when running in the test harness and attempting
6015 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6016 getting "No route to host". Convert this to a timeout.
6018 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6021 6. Some OS don't have socklen_t but use size_t instead. This affects the
6022 fifth argument of getsockopt() amongst other things. This is now
6023 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6024 can be set for individual OS. I have set it for SunOS5, OSF1, and
6025 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6026 some earlier ones do not.
6028 7. Change 4.30/15 was not doing the test caselessly.
6030 8. The standard form for an IPv6 address literal was being rejected by address
6031 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6032 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6033 this, as well as the form without the "IPv6" on the front (but only when
6034 address literals are enabled, of course).
6036 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6038 10. Exim crashed if a message with an empty sender address specified by -f
6039 encountered a router with an errors_to setting. This could be provoked only
6040 by a command such as
6044 where an empty string was supplied; "<>" did not hit this bug.
6046 11. Installed PCRE release 4.5.
6048 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6049 remained set. It is now erased.
6051 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6052 times from message ids (which are base 36 rather than the normal 62).
6054 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6055 were being counted as actual protocol errors, and logged if the log
6056 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6057 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6058 and DATA following a set of rejected RCPTs do not count as protocol errors.
6059 In other words, Exim assumes they were pipelined, though this may not
6060 actually be the case. Of course, in all cases the client gets an
6061 appropriate error code.
6063 15. If a lookup fails in an ACL condition, a message about the failure may
6064 be available; it is used if testing the ACL cannot continue, because most
6065 such messages specify what the cause of the deferral is. However, some
6066 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6067 that caused an old message to be retained and used if a later statement
6068 caused a defer, replacing the real cause of the deferral.
6070 16. If an IP address had so many PTR records that the DNS lookup buffer
6071 was not large enough to hold them, Exim could crash while trying to process
6072 the truncated data. It now detects and logs this case.
6074 17. Further to 4.21/58, another change has been made: if (and only if) the
6075 first line of a message (the first header line) ends with CRLF, a bare LF
6076 in a subsequent header line has a space inserted after it, so as not to
6077 terminate the header.
6079 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6080 unnecessarily, used atoi() instead of strtol(), and didn't check the
6081 termination when getting file sizes from file names by regex.
6083 19. Completely re-implemented the support for maildirsize files, in the light
6084 of a number of problems with the previous contributed implementation
6085 (4.30/29). In particular:
6087 . If the quota is zero, the maildirsize file is maintained, but no quota is
6090 . If the maildir directory does not exist, it is created before any attempt
6091 to write a maildirsize file.
6093 . The quota value in the file is just a cache; if the quota is changed in
6094 the transport, the new value overrides.
6096 . A regular expression is available for excluding directories from the
6099 20. The autoreply transport checks the characters in options that define the
6100 message's headers; it allows continued headers, but it was checking with
6101 isspace() after an embedded newline instead of explicitly looking for a
6104 21. If all the "regular" hosts to which an address was routed had passed their
6105 expiry times, and had not reached their retry times, the address was
6106 bounced, even if fallback hosts were defined. Now Exim should go on to try
6109 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6110 equivalent code in the SMTP transport. Some hosts send humungous responses
6111 to HELO/EHLO, more than 1024 it seems.
6113 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6114 gives compiler warnings in some environments. I've now done it "properly",
6117 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6118 (because of problems with the built-in one) was declared to return uschar *
6119 instead of char *, causing compiler failure.
6121 25. Fixed a file descriptor leak when processing alias/forward files.
6123 26. Fixed a minor format string issue in dbfn.c.
6125 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6127 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6128 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6131 29. When a sender address is verified, it is cached, to save repeating the test
6132 when there is more than one recipient in a message. However, when the
6133 verification involves a callout, it is possible for different callout
6134 options to be set for different recipients. It is too complicated to keep
6135 track of this in the cache, so now Exim always runs a verification when a
6136 callout is required, relying on the callout cache for the optimization.
6137 The overhead is duplication of the address routing, but this should not be
6140 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6141 to be verified with callout=postmaster, and the main callout worked but the
6142 postmaster check failed, the verification correctly failed. However, if a
6143 subsequent RCPT command asked for sender verification *without* the
6144 postmaster check, incorrect caching caused this verification also to fail,
6147 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6148 it was not caching the DNS options (qualify_single, search_parents) that
6149 were used when the lookup failed. A subsequent lookup with different
6150 options therefore always gave the same answer, though there were cases
6151 where it should not have. (Example: a "domains = !$mx_any" option on a
6152 dnslookup router: the "domains" option is always processed without any
6153 widening, but the router might have qualify_single set.) Now Exim uses the
6154 cached value only when the same options are set.
6156 32. Added John Jetmore's "exipick" utility to the distribution.
6158 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6159 than a timeout (e.g. a certificate is required, and is not provided), an
6160 Exim server now closes the connection immediately. Previously it waited for
6161 the client to close - but if the client is SSL, it seems that they each
6162 wait for each other, leading to a delay before one of them times out.
6164 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6165 maintained 0.8.x compatibility because I don't think many are using it, and
6166 it is clearly obsolete.
6168 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6171 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6172 client certificate was expired. A simple patch fixes this, though I don't
6173 understand the full logic of why the verify callback is called multiple
6176 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6177 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6178 which causes problems with some clients (such as the Certicom SSL Plus
6179 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6180 disables the coutermeasure allowing Eudora to connect."
6182 38. Exim was not checking that a write() to a log file succeeded. This could
6183 lead to Bad Things if a log got too big, in particular if it hit a file
6184 size limit. Exim now panics and dies if it cannot write to a log file, just
6185 as it does if it cannot open a log file.
6187 39. Modified OS/Makefile-Linux so that it now contains
6189 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6191 The two -D definitions ensure that Exim is compiled with large file
6192 support, which makes it possible to handle log files that are bigger than
6195 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6196 instance) a domain was checked against a named list that involved a lookup,
6197 causing $domain_data to be set, then another domain was checked against the
6198 same list, then the first domain was re-checked, the value of $domain_data
6199 after the final check could be wrong. In particular, if the second check
6200 failed, it could be set empty. This bug probably also applied to
6203 41. The strip_trailing_dot option was not being applied to the address given
6204 with the -f command-line option.
6206 42. The code for reading a message's header from the spool was incrementing
6207 $received_count, but never initializing it. This meant that the value was
6208 incorrect (doubled) while delivering a message in the same process in which
6209 it was received. In the most common configuration of Exim, this never
6210 happens - a fresh exec is done - but it can happen when
6211 deliver_drop_privilege is set.
6213 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6214 it now includes up to 150 characters of the unexpected data in the log
6217 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6218 and building data strings. The size of both of these buffers was 10 000
6219 bytes - far larger than anybody would *ever* want, thought I. Needless to
6220 say, somebody hit the limit. I have increased the maximum line length to
6221 20 000 and the maximum data length of concatenated lines to 100 000. I have
6222 also fixed two bugs, because there was no checking on these buffers. Tsk,
6223 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6224 buffer is too small.
6226 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6227 lsearch lookups. Now it does.
6229 46. When parsing a route_list item in a manualroute router, a fixed-length
6230 buffer was used for the list of hosts. I made this 1024 bytes long,
6231 thinking that nobody would ever have a list of hosts that long. Wrong.
6232 Somebody had a whole pile of complicated expansion conditions, and the
6233 string was silently truncated, leading to an expansion error. It turns out
6234 that it is easier to change to an unlimited length (owing to other changes
6235 that have happened since this code was originally written) than to build
6236 structure for giving a limitation error. The length of the item that
6237 expands into the list of hosts is now unlimited.
6239 47. The lsearch lookup could not handle data where the length of text line was
6240 more than 4095 characters. Such lines were truncated, leading to shortened
6241 data being returned. It should now handle lines of any length.
6243 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6244 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6247 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6248 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6249 no longer happens in comment lines. A list of replacements is now placed
6250 at the head of all of the source files, except those whose only change is
6251 to replace PERL_COMMAND in the very first #! line.
6253 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6254 messages on the queue, with a bottom-up merge sort, using code contributed
6255 by Michael Haardt. This should make operations like -bp somewhat faster on
6256 large queues. It won't affect queue runners, except when queue_run_in_order
6259 51. Installed eximstats 1.31 in the distribution.
6261 52. Added support for SRV lookups to the dnslookup router.
6263 53. If an ACL referred to $message_body or $message_body_end, the value was not
6264 reset for any messages that followed in the same SMTP session.
6266 54. The store-handling optimization for building very long strings was not
6267 differentiating between the different store pools. I don't think this
6268 actually made any difference in practice, but I've tidied it.
6270 55. While running the routers to verify a sender address, $sender_address
6271 was still set to the sender address. This is wrong, because when routing to
6272 send a bounce to the sender, it would be empty. Therefore, I have changed
6273 it so that, while verifying a sender address, $sender_address is set to <>.
6274 (There is no change to what happens when verifying a recipient address.)
6276 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6277 target A or AAAA records (if not already returned) without resetting the
6278 qualify_single or search_parents options of the DNS resolver. These are
6279 inappropriate in this case because the targets of MX and SRV records must
6280 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6281 target that, when qualified, matched something in the local domain. These
6282 two options are now turned off when doing these lookups.
6284 57. It seems that at least some releases of Reiserfs (which does not have the
6285 concept of a fixed number of inodes) returns zero and not -1 for the
6286 number of available inodes. This interacted badly with check_spool_inodes,
6287 which assumed that -1 was the "no such thing" setting. What I have done is
6288 to check that the total number of inodes is greater than zero before doing
6289 the test of how many are available.
6291 58. When a "warn" ACL statement has a log_message modifier, the message is
6292 remembered, and not repeated. This is to avoid a lot of repetition when a
6293 message has many recipients that cause the same warning to be written.
6294 However, Exim was preserving the list of already written lines for an
6295 entire SMTP session, which doesn't seem right. The memory is now reset if a
6296 new message is started.
6298 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6299 debugging output unless log_rewrite was also set.
6301 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6302 of (int)(handle) when we know that handle contains (void *)(-1).
6304 61. The Exim daemon panic-logs an error return when it closes the incoming
6305 connection. However "connection reset by peer" seems to be common, and
6306 isn't really an error worthy of noting specially, so that particular error
6309 62. When Exim is trying to find all the local interfaces, it used to panic and
6310 die if the ioctl to get the interface flags failed. However, it seems that
6311 on at least one OS (Solaris 9) it is possible to have an interface that is
6312 included in the list of interfaces, but for which you get a failure error
6313 for this call. This happens when the interface is not "plumbed" into a
6314 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6315 failure of the "get flags" call assumes that the interface is down.
6317 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6318 makes life easier for people who are doing arithmetic on fields extracted
6319 from dates, where you often get leading zeros that should not be
6320 interpreted as octal.
6322 64. Added qualify_domain to the redirect router, to override the global
6325 65. If a pathologically long header line contained very many addresses (the
6326 report of this problem mentioned 10 000) and each of them was rewritten,
6327 Exim could use up a very large amount of memory. (It kept on making new
6328 copies of the header line as it rewrote, and never released the old ones.)
6329 At the expense of a bit more processing, the header rewriting function has
6330 been changed so that it no longer eats memory in this way.
6332 66. The generation of the Received: header has been moved from the time that a
6333 message starts to be received, to the time that it finishes. The timestamp
6334 in the Received: header should now be very close to that of the <= log
6335 line. There are two side-effects of this change:
6337 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6338 logged header lines no longer include the local Received: line, because
6339 it has not yet been created. The same applies to a copy of the message
6340 that is returned to a non-SMTP sender when a message is rejected.
6342 (b) When a filter file is tested using -bf, no additional Received: header
6343 is added to the test message. After some thought, I decided that this
6346 This change does not affect the value of $received_for. It is still set
6347 after address rewriting, but before local_scan() is called.
6349 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6351 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6352 gave an unhelpful panic error message, and a defer error. I have managed to
6353 change this behaviour so that it now rejects any supplied certificate,
6354 which seems right, as the list of acceptable certificates is empty.
6356 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6357 gave an unhelpful defer error. I have not managed to make this reject any
6358 supplied certificates, but the error message it gives is "no certificate
6359 supplied", which is not helpful.
6361 70. exigrep's output now also includes lines that are not associated with any
6362 message, but which match the given pattern. Implemented by a patch from
6363 Martin Sluka, which also tidied up the Perl a bit.
6365 71. Recipient callout verification, like sender verification, was using <> in
6366 the MAIL FROM command. This isn't really the right thing, since the actual
6367 sender may affect whether the remote host accepts the recipient or not. I
6368 have changed it to use the actual sender in the callout; this means that
6369 the cache record is now keyed on a recipient/sender pair, not just the
6370 recipient address. There doesn't seem to be a real danger of callout loops,
6371 since a callout by the remote host to check the sender would use <>.
6372 [SEE ABOVE: changed after hitting problems.]
6374 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6375 temporary errors. However, in the case of such a code being given after
6376 the end of a data transmission (i.e. after ".") Exim was failing to write
6377 a retry record for the message. (Yes, there was some broken host that was
6378 actually sending 8xx at this point.)
6380 73. An unknown lookup type in a host list could cause Exim to panic-die when
6381 the list was checked. (An example that provoked this was putting <; in the
6382 middle of a list instead of at the start.) If this happened during a DATA
6383 ACL check, a -D file could be left lying around. This kind of configuration
6384 error no longer causes Exim to die; instead it causes a defer error. The
6385 incident is still logged to the main and panic logs.
6387 74. Buglet left over from Exim 3 conversion. The message "too many messages
6388 in one connection" was written to the rejectlog but not the mainlog, except
6389 when address rewriting (yes!) was being logged.
6391 75. Added write_rejectlog option.
6393 76. When a system filter was run not as root (that is, when system_filter_user
6394 was set), the values of the $n variables were not being returned to the
6395 main process; thus, they were not subsequently available in the $sn
6398 77. Added +return_path_on_delivery log selector.
6400 78. A connection timeout was being treated differently from recipients deferred
6401 when testing hosts_max_try with a message that was older than the host's
6402 retry timeout. (The host should not be counted, thus allowing all hosts to
6403 be tried at least once before bouncing.) This may have been the cause of an
6404 occasionally reported bug whereby a message would remain on the queue
6405 longer than the retry timeout, but would be bounced if a delivery was
6406 forced. I say "may" because I never totally pinned down the problem;
6407 setting up timeout/retry tests is difficult. See also the next item.
6409 79. The ultimate address timeout was not being applied to errors that involved
6410 a combination of host plus message (for example, a timeout on a MAIL
6411 command). When an address resolved to a number of possible hosts, and they
6412 were not all tried for each delivery (e.g. because of hosts_max_try), a
6413 message could remain on the queue longer than the retry timeout.
6415 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6418 81. Fixed an obscure SMTP outgoing bug which required at least the following
6419 conditions: (a) there was another message waiting for the same server;
6420 (b) the server returned 5xx to all RCPT commands in the first message so
6421 that the message was not completed; (c) the server dropped the connection
6422 or gave a negative response to the RSET that Exim sends to abort the
6423 transaction. The observed case was a dropped connection after DATA that had
6424 been sent in pipelining mode. That is, the server had advertised PIPELINING
6425 but was not implementing it correctly. The effect of the bug was incorrect
6426 behaviour, such as trying another host, and this could lead to a crash.
6432 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6433 and daemon.c were passed as pointers to ints; they should have been
6434 pointers to socklen_t variables (which are typically unsigned ints).
6436 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6439 3. Fixed a really odd bug that affected only the testing scheme; patching a
6440 certain fixed string in the binary changed the value of another string that
6441 happened to be identical to the end of the original first string.
6443 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6444 name", it returns that address as the IP address. On some operating
6445 systems (e.g. Solaris), it also passes back the IP address string as the
6446 "host name". However, on others (e.g. Linux), it passes back an empty
6447 string. Exim wasn't checking for this, and was changing the host name to an
6448 empty string, assuming it had been canonicalized.
6450 5. Although rare, it is permitted to have more than one PTR record for a given
6451 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6452 all the names associated with an address, because they do in Solaris.
6453 However, it seems that they do not in Linux for data that comes from the
6454 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6455 I found this out when I moved to a new Linux workstation and tried to run
6456 the Exim test suite.
6458 To get round this problem I have changed the code so that it now does its
6459 own call to the DNS to look up PTR records when searching for a host name.
6460 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6461 addresses that are only in /etc/hosts are still found.
6463 This behaviour is, however, controlled by an option called host_lookup_
6464 order, which defaults to "bydns:byaddr". If people want to use the other
6465 order, or indeed, just use one or the other means of lookup, they can
6466 specify it in this variable.
6468 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6469 some operating systems, this comes back from gethostbyaddr() as an empty
6470 string, and this is what Exim used to test for. However, it seems that in
6471 other systems, "." is yielded. Exim now tests for this case too.
6473 7. The values of check_spool_space and check_log_space are now held internally
6474 as a number of kilobytes instead of an absolute number of bytes. If a
6475 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6476 kilobyte. This means that much larger values can be stored.
6478 8. Exim monitor: an attempt to get the action menu when not actually pointing
6479 at a message produces an empty menu entitled "No message selected". This
6480 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6481 no entries in it ("Shell widget menu has zero width and/or height"). So I
6482 have added a single, blank menu entry in this case.
6484 9. Added ${quote_local_part.
6486 10. MIME decoding is now applied to the contents of Subject: header lines when
6489 11. Now that a reference to $sender_host_address automatically causes a reverse
6490 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6491 host lookup before query-style lookups in lists that might use this
6492 variable. This has therefore been abolished, and the "net-" prefix is no
6493 longer necessary for query-style lookups.
6495 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6496 have been a typo for LFLAGS, so it has been changed.
6498 13. The install script calls Exim with "-C /dev/null" in order to find the
6499 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6500 to be output. However, since Exim outputs its version number before the
6501 error, it didn't break the script. It just looked ugly. I fixed this by
6502 always allowing "-C /dev/null" if the caller is root.
6504 14. Ignore overlarge ACL variable number when reading spool file - insurance
6505 against a later release with more variables having written the file.
6507 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6508 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6509 this, as well as the form without the "IPv6" on the front.
6511 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6512 OS/Makefile-Darwin file.
6514 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6515 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6517 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6518 variable. However, some OS use ints for inodes. I've added cast to long int
6519 to get rid of the compiler warning.
6521 19. I had forgotten to lock out "/../" in configuration file names when
6522 ALT_CONFIG_PREFIX was set.
6524 20. Routers used for verification do not need to specify transports. However,
6525 if such a router generated a host list, and callout was configured, Exim
6526 crashed, because it could not find a port number from the (non-existent)
6527 transport. It now assumes port 25 in this circumstance.
6529 21. Added the -t option to exigrep.
6531 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6532 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6533 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6534 them is set, LOOKUP_LSEARCH is forced.
6536 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6538 24. Added sender and host information to the "rejected by local_scan()" log
6539 line; previously there was no indication of these.
6541 25. Added .include_if_exists.
6543 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6544 Linux. It turns out that not all file systems support this. Apparently some
6545 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6546 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6547 not supported on the file descriptor, is now ignored when Exim is trying to
6548 sync a directory. This applies only to Linux.
6550 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6552 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6553 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6556 29. Added support for maildirsize files from supplied patch (modified a bit).
6558 30. The use of :fail: followed by an empty string could lead Exim to respond to
6559 sender verification failures with (e.g.):
6561 550 Verification failed for <xxx>
6562 550 Sender verify failed
6564 where the first response line was missing the '-' that indicates it is not
6565 the final line of the response.
6567 31. The loop for finding the name of the user that called Exim had a hardwired
6568 limit of 10; it now uses the value of finduser_retries, which is used for
6569 all other user lookups.
6571 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6574 33. Exim was neglecting to zero errno before one call of strtol() when
6575 expanding a string and expecting an integer value. On some systems this
6576 resulted in spurious "integer overflow" errors. Also, it was casting the
6577 result into an int without checking.
6579 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6580 did not work. The code looks as if it has *never* worked, though it appears
6581 to have been documented since at least release 1.62. I have made it work.
6583 35. The "timeout_DNS" error in retry rules, also documented since at least
6584 1.62, also never worked. As it isn't clear exactly what this means, and
6585 clearly it isn't a major issue, I have abolished the feature by treating it
6586 as "timeout", and writing a warning to the main and panic logs.
6588 36. The display of retry rules for -brt wasn't always showing the error code
6591 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6592 timeout_connect_A, timeout_connect_MX.
6594 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6595 to the empty sender.
6597 39. The daemon was not analysing the content of -oX till after it had closed
6598 stderr and disconnected from the controlling terminal. This meant that any
6599 syntax errors were only noted on the panic log, and the return code from
6600 the command was 0. By re-arranging the code a little, I've made the
6601 decoding happen first, so such errors now appear on stderr, and the return
6602 code is 1. However, the actual setting up of the sockets still happens in
6603 the disconnected process, so errors there are still only recorded on the
6606 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6607 connections (as happens on some IP stacks) was logged at start up time as
6608 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6609 it from "IPv6 and IPv4", which means that two separate sockets are being
6612 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6613 says whether AF_INET or AF_INET6 was passed as an argument.
6615 42. Exiwhat output was messed up when time zones were included in log
6618 43. Exiwhat now gives more information about the daemon's listening ports,
6619 and whether -tls-on-connect was used.
6621 44. The "port" option of the smtp transport is now expanded.
6623 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6624 silently ignored. Now an error message is written to the main and panic
6627 46. There's a new ACL modifier called "logwrite" which writes to a log file
6628 as soon as it is encountered.
6630 47. Added $local_user_uid and $local_user_gid at routing time.
6632 48. Exim crashed when trying to verify a sender address that was being
6635 49. Exim was recognizing only a space character after ".include". It now also
6636 recognizes a tab character.
6638 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6639 extracting the relevant information from the specification. The man page no
6640 longer contains scrambled data for the -d option, and I've added a section
6641 at the front about calling Exim under different names.
6643 51. Added "extra_headers" argument to the "mail" command in filter files.
6645 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6648 53. Installed eximstats 1.29.
6650 54. Added transport_filter_timeout as a generic transport option.
6652 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6653 Cc: header lines. This was required by RFC 822, but it not required by RFC
6656 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6657 incoming messages that did not have them. Now it does so only if the
6658 message originates locally, that is, if there is no associated remote host
6659 address. When Resent- header lines are present, this applies to the Resent-
6660 lines rather than the non-Resent- lines.
6662 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6663 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6665 58. Messages for configuration errors now include the name of the main
6666 configuration file - useful now that there may be more than one file in a
6667 list (.included file names were always shown).
6669 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6670 for those rare installations that do not start the daemon as root or run it
6671 setuid root. I've cut out the call to initgroups() if the daemon is not
6674 60. The Exim user and group can now be bound into the binary as text strings
6675 that are looked up at the start of Exim's processing.
6677 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6679 62. Added $mailstore_basename variable.
6681 63. Installed patch to sieve.c from Michael Haardt.
6683 64. When Exim failed to open the panic log after failing to open the main log,
6684 the original message it was trying to log was written to stderr and debug
6685 output, but if they were not available (the usual case in production), it
6686 was lost. Now it is written to syslog before the two lines that record the
6687 failures to open the logs.
6689 65. Users' Exim filters run in subprocesses under the user's uid. It is
6690 possible for a "deliver" command or an alias in a "personal" command to
6691 provoke an address rewrite. If logging of address rewriting is configured,
6692 this fails because the process is not running as root or exim. There may be
6693 a better way of dealing with this, but for the moment (because 4.30 needs
6694 to be released), I have disabled address rewrite logging when running a
6695 filter in a non-root, non-exim process.
6701 1. The buildconfig auxiliary program wasn't quoting the value set for
6702 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6703 not defined. This bug was masked in 4.22 by the effect that was fixed in
6706 2. Some messages that were rejected after a message id was allocated were
6707 shown as "incomplete" by exigrep. It no longer does this for messages that
6708 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6710 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6711 have allow_domain_literals set, the ID did not get logged in the <= line.
6712 Domain literals are now always recognized in Message-ID: header lines.
6714 4. The first argument for a ${extract expansion item is the key name or field
6715 number. Leading and trailing spaces in this item were not being ignored,
6716 causing some misleading effects.
6718 5. When deliver_drop_privilege was set, single queue runner processes started
6719 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6720 same command in the process it spins off) were not dropping privilege.
6722 6. When the daemon running as "exim" started a queue runner, it always
6723 re-executed Exim in the spun-off process. This is a waste of effort when
6724 deliver_drop_privilege is set. The new process now just calls the
6725 queue-runner function directly.
6731 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6734 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6735 ignored. Though the use of -oP was forcing the writing of a pid file, it
6736 was always written to the default place.
6738 3. If the message "no IP address found for host xxxx" is generated during
6739 incoming verification, it is now followed by identification of the incoming
6740 connection (so you can more easily find what provoked it).
6742 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6744 5. Added some features to "harden" Exim a bit more against certain attacks:
6746 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6747 be put in Local/Makefile. This is like the never_users runtime option,
6748 but it cannot be overridden. The default setting is "root".
6750 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6751 prefix string with which any file named in a -C command line option
6754 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6755 is retained for -C and -D only if the caller of Exim is root. Without
6756 it, the exim user may also use -C and -D and retain privilege.
6758 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6759 command line option is disabled.
6761 6. Macro names set by the -D option must start with an upper case letter, just
6762 like macro names defined in the configuration file.
6764 7. Added "dereference=" facility to LDAP.
6766 8. Two instances of the typo "uknown" in the source files are fixed.
6768 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6769 the Configure-Makefile script screwed up while processing it.
6771 10. Incorporated PCRE 4.4.
6773 11. The SMTP synchronization check was not operating right at the start of an
6774 SMTP session. For example, it could not catch a HELO sent before the client
6775 waited for the greeting. There is now a check for outstanding input at the
6776 point when the greeting is written. Because of the duplex, asynchronous
6777 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6778 way, but not yet received, when the check is performed.
6780 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6781 on TCP/IP sockets, because this apparently causes some broken clients to
6784 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6785 unchanged) from the Cygwin maintainer.
6787 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6788 was supported instead of testing for mbx. Effectively a typo.
6790 15. The spa authenticator server code was not checking that the input it
6791 received was valid base64.
6793 16. The debug output line for the "set" modifier in ACLs was not showing the
6794 name of the variable that was being set.
6796 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6798 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6799 lookup on its own. Something else was needed to trigger the lookup. For
6800 example, a match in host_lookup or the need for a host name in a host list.
6801 Now, if $sender_host_name is referenced and the host name has not yet been
6802 looked up, a lookup is performed. If the lookup fails, the variable remains
6803 empty, and $host_lookup_failed is set to "1".
6805 19. Added "eqi" as a case-independent comparison operator.
6807 20. The saslauthd authentication condition could segfault if neither service
6808 nor realm was specified.
6810 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6811 error message that was logged was misleading, and incoming SMTP
6812 connections were dropped. The message is now more accurate, and temporary
6813 errors are given to SMTP connections.
6815 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6816 (except RSET) with a 421 error, until QUIT is received. However, it was
6817 failing to send a response to QUIT.
6819 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6820 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6821 ACL is now run after the helo_try_verify_hosts code.
6823 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6824 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6825 case-independent, so other case variants are also recognized). Apparently
6826 some systems use these upper case variants.
6828 25. If more than two messages were waiting for the same host, and a transport
6829 filter was specified for the transport, Exim sent two messages over the
6830 same TCP/IP connection, and then failed with "socket operation on non-
6831 socket" when it tried to send the third.
6833 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6835 27. The extern definition of crypt16() in expand.c was not being excluded when
6836 the OS had its own crypt16() function.
6838 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6839 as a preferred synonym for return_size_limit, both as an option and as an
6842 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6844 30. Changed the default configuration ACL to relax the local part checking rule
6845 for addresses that are not in any local domains. For these addresses,
6846 slashes and pipe symbols are allowed within local parts, but the sequence
6847 /../ is explicitly forbidden.
6849 31. SPA server authentication was not clearing the challenge buffer before
6852 32. log_message in a "warn" ACL statement was writing to the reject log as
6853 well as to the main log, which contradicts the documentation and doesn't
6854 seem right (because no rejection is happening). So I have stopped it.
6856 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6857 However, I am unable to do any testing of this.
6859 34. Fixed an infelicity in the appendfile transport. When checking directories
6860 for a mailbox, to see if any needed to be created, it was accidentally
6861 using path names with one or more superfluous leading slashes; tracing
6862 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6864 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6865 contents are added to the log line that is written for every discarded
6866 recipient. (Previously a log_message setting was ignored.)
6868 36. The ${quote: operator now quotes the string if it is empty.
6870 37. The install script runs exim in order to find its version number. If for
6871 some reason other than non-existence or emptiness, which it checks, it
6872 could not run './exim', it was installing it with an empty version number,
6873 i.e. as "exim-". This error state is now caught, and the installation is
6876 38. An argument was missing from the function that creates an error message
6877 when Exim fails to connect to the socket for saslauthd authentication.
6878 This could cause Exim to crash, or give a corrupted message.
6880 39. Added isip, isip4, and isip6 to ${if conditions.
6882 40. The ACL variables $acl_xx are now saved with the message, and can be
6883 accessed later in routers, transports, and filters.
6885 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6886 strings in the file are not string-expanded.
6888 42. If a MAIL command specified a SIZE value that was too large to fit into an
6889 int variable, the check against message_size_limit failed. Such values are
6890 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6891 day this will have to be increased, but I don't think I want to be around
6892 when emails are that large.
6899 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6900 iconv() is not standard in FreeBSD.
6902 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6903 IPv6 enabled. The observed symptom was a segmentation fault on return from
6904 the function os_common_find_running_interfaces() in src/os.c.
6906 3. In the check_special_case() function in daemon.c I had used "errno" as an
6907 argument name, which causes warnings on some systems. This was basically a
6908 typo, since it was named "eno" in the comments!
6910 4. The code that waits for the clock to tick (at a resolution of some fraction
6911 of a second) so as to ensure message-id uniqueness was always waiting for
6912 at least one whole tick, when it could have waited for less. [This is
6913 almost certainly not relevant at current processor speeds, where it is
6914 unlikely to ever wait at all. But we try to future-proof.]
6916 5. The function that sleeps for a time interval that includes fractions of a
6917 second contained a race. It did not block SIGALRM between setting the
6918 timer, and suspending (a couple of lines later). If the interval was short
6919 and the sigsuspend() was delayed until after it had expired, the suspension
6920 never ended. On busy systems this could lead to processes getting stuck for
6923 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6924 process, before it forks any delivery processes. The open lookup caching
6925 mechanism meant that the open file or database connection was passed into
6926 the delivery process. The problem was that delivery processes always tidy
6927 up cached lookup data. This could cause a problem for the next delivery
6928 process started by the queue runner, because the external queue runner
6929 process does not know about the closure. So the next delivery process
6930 still has data in the lookup cache. In the case of a file lookup, there was
6931 no problem because closing a file descriptor in a subprocess doesn't affect
6932 the parent. However, if the lookup was caching a connection to a database,
6933 the connection was closed, and the second delivery process was likely to
6934 see errors such as "PGSQL: query failed: server closed the connection
6935 unexpectedly". The problem has been fixed by closing all cached lookups
6936 in a queue runner before running a delivery process.
6938 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6939 seem to have the "const" qualifier which it has on other OS. I've
6942 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6943 *of the same type* (client or server) with the same public name that an
6944 error should be diagnosed.
6946 9. When Exim looked up a host name for an IP address, but failed to find the
6947 original IP address when looking up the host name (a safety check), it
6948 output the message "<ip address> does not match any IP for NULL", which was
6949 confusing, to say the least. The bug was that the host name should have
6950 appeared instead of "NULL".
6952 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6953 user that is built into the binary, and the -C or -D options is used, root
6954 privilege is dropped before the configuration file is read. In addition,
6955 logging is switched to stderr instead of the normal log files. If the
6956 configuration then re-defines the Exim user, the unprivileged environment
6957 is probably not what is expected, so Exim logs a panic warning message (but
6960 However, if deliver_drop_privilege is set, the unprivileged state may well
6961 be exactly what is intended, so the warning has been cut out in that case,
6962 and Exim is allowed to try to write to its normal log files.
6968 1. smtp_return_error_details was not giving details for temporary sender
6969 or receiver verification errors.
6971 2. Diagnose a configuration error if two authenticators have the same public
6974 3. Exim used not to create the message log file for a message until the first
6975 delivery attempt. This could be confusing when incoming messages were held
6976 for policy or load reasons. The message log file is now created at the time
6977 the message is received, and an initial "Received" line is written to it.
6979 4. The automatically generated man page for command line options had a minor
6980 bug that caused no ill effects; however, a more serious problem was that
6981 the procedure for building the man page automatically didn't always
6982 operate. Consequently, release 4.20 contains an out-of-date version. This
6983 shouldn't happen again.
6985 5. When building Exim with embedded Perl support, the script that builds the
6986 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6987 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6989 6. The freeze_tell option was not being used for messages that were frozen on
6990 arrival, either by an ACL or by local_scan().
6992 7. Added the smtp_incomplete_transaction log selector.
6994 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6995 was accepting AUTH without a new EHLO.
6997 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6998 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7001 10. Logging of TCP/IP connections (when configured) now happens in the main
7002 daemon process instead of the child process, so that the TCP/IP connection
7003 count is more accurate (but it can never be perfect).
7005 11. The use of "drop" in a nested ACL was not being handled correctly in the
7006 outer ACL. Now, if condition failure induced by the nested "drop" causes
7007 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7008 or "require"), the connection is dropped.
7010 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7011 that yield "discard" can now be used with an "accept" or a "discard" verb,
7012 but an error is generated for any others (because I can't see a useful way
7013 to define what should happen).
7015 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7016 are now processed in the same way as lines in the Exim configuration file.
7017 In particular, continuation lines are supported.
7019 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7021 15. Added -ti meaning -t -i.
7023 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7024 domains, and warn by logging if others are found.
7026 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7027 returned from GIFCONF when Exim is trying to find the list of interfaces on
7028 a host. The code in os.c has been modified to copy each ifreq to an aligned
7029 structure in all cases.
7031 Also, in some cases, the returned ifreq's were being copied to a 'struct
7032 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7033 means the last couple of bytes of an IPv6 address could be chopped if the
7034 ifreq contained only a normal sockaddr (14 bytes storage).
7036 18. Named domain lists were not supported in the hosts_treat_as_local option.
7037 An entry such as +xxxx was not recognized, and was treated as a literal
7040 19. Ensure that header lines added by a DATA ACL are included in the reject log
7041 if the ACL subsequently rejects the message.
7043 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7044 MD5 (which is deprecated).
7046 21. When testing a filter file using -bf, Exim was writing a message when it
7047 took the sender from a "From " line in the message, but it was not doing so
7048 when it took $return_path from a Return-Path: header line. It now does.
7050 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7051 with a valid header line field name (a series of printing characters
7052 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7054 23. Changed "disc" in the source to "disk" to conform to the documentation and
7055 the book and for uniformity.
7057 24. Ignore Sendmail's -Ooption=value command line item.
7059 25. When execve() failed while trying to run a command in a pipe transport,
7060 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7061 could be confused with a return value of 69 from the command itself. This
7062 has been changed to 127, the value the shell returns if it is asked to run
7063 a non-existent command. The wording for the related log line suggests a
7064 non-existent command as the problem.
7066 26. If received_header_text expands to an empty string, do not add a Received:
7067 header line to the message. (Well, it adds a token one on the spool, but
7068 marks it "old" so that it doesn't get used or transmitted.)
7070 27. Installed eximstats 1.28 (addition of -nt option).
7072 28. There was no check for failure on the call to getsockname() in the daemon
7073 code. This can fail if there is a shortage of resources on the system, with
7074 ENOMEM, for example. A temporary error is now given on failure.
7076 29. Contrary to the C standard, it seems that in some environments, the
7077 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7078 program. Exim now does this explicitly; it affects the formatting of
7079 timestamps using strftime().
7081 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7082 complaints. I've now initialized all the variables, to avoid this.
7084 32. Header lines added by a system filter were not being "seen" during
7085 transport-time rewrites.
7087 33. The info_callback() function passed to OpenSSL is set up with type void
7088 (*)(SSL *, int, int), as described somewhere. However, when calling the
7089 function (actually a macro) that sets it up, the type void(*)() is
7090 expected. I've put in a cast to prevent warnings from picky compilers.
7092 34. If a DNS black list lookup found a CNAME record, but there were no A
7093 records associated with the domain it pointed at, Exim crashed.
7095 35. If a DNS black list lookup returned more than one A record, Exim ignored
7096 all but the first. It now scans all returned addresses if a particular IP
7097 value is being sought. In this situation, the contents of the
7098 $dnslist_value variable are a list of all the addresses, separated by a
7101 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7102 to accept a host name and all its aliases if the forward lookup for any of
7103 them yielded the IP address of the incoming connection. Now it accepts only
7104 those names whose forward lookup yields the correct IP address. Any other
7105 names are discarded. This closes a loophole whereby a rogue DNS
7106 administrator could create reverse DNS records to break through a
7107 wildcarded host restriction in an ACL.
7109 37. If a user filter or a system filter that ran in a subprocess used any of
7110 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7111 the wrong values were passed to the pipe command ($thisaddress had the
7112 value of $0, $0 had the value of $1, etc). This bug was introduced by
7113 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7115 38. Improved the line breaking for long SMTP error messages from ACLs.
7116 Previously, if there was no break point between 40 and 75 characters, Exim
7117 left the rest of the message alone. Two changes have been made: (a) I've
7118 reduced the minimum length to 35 characters; (b) if it can't find a break
7119 point between 35 and 75 characters, it looks ahead and uses the first one
7120 that it finds. This may give the occasional overlong line, but at least the
7121 remaining text gets split now.
7123 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7124 file descriptors might be low, and that setting 1000 would always raise it.
7125 It turns out that in some environments, the limit is already over 1000 and
7126 that lowering it causes trouble. So now Exim takes care not to decrease it.
7128 40. When delivering a message, the value of $return_path is set to $sender_
7129 address at the start of routing (routers may change the value). By an
7130 oversight, this default was not being set up when an address was tested by
7131 -bt or -bv, which affected the outcome if any router or filter referred to
7134 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7135 log only when "message" or "log_message" are set. However, if one of the
7136 conditions was an address verification, or a call to a nested ACL, the
7137 messages generated by the underlying test were being passed through. This
7138 no longer happens. The underlying message is available in $acl_verify_
7139 message for both "message" and "log_message" expansions, so it can be
7140 passed through if needed.
7142 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7143 new expansion $bh_ to give the encoded byte string without charset
7144 translation. Translation happens only if iconv() is available; HAVE_ICONV
7145 indicates this at build time. HEADERS_CHARSET gives the charset to
7146 translate to; headers_charset can change it in the configuration, and
7147 "headers charset" can change it in an individual filter file.
7149 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7150 that creates RFC 2047 encoded "words" labels them as that charset instead
7151 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7152 expansion operator; (ii) when Exim creates a From: line for a local
7153 message; (iii) when a header line is rewritten to include a "phrase" part.
7155 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7156 buggy, causing it to skip the first lines of messages whose message ID
7157 ended in 'D'. This would not have bitten before Exim release 4.14, because
7158 message IDs were unlikely to end in 'D' before then. The effect was to have
7159 incorrect size information for certain domains.
7161 45. #include "config.h" was missing at the start of the crypt16.c module. This
7162 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7165 46. If there was a timeout during a "random" callout check, Exim treated it as
7166 a failure of the random address, and carried on sending RSET and the real
7167 address. If the delay was just some slowness somewhere, the response to the
7168 original RCPT would be taken as a response to RSET and so on, causing
7169 mayhem of various kinds.
7171 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7172 when I implemented it. It didn't allow for the fact that some option values
7173 may legitimately be negative (e.g. size_addition), and it didn't even do
7174 the right test for positive values.
7176 48. Domain names in DNS records are case-independent. Exim always looks them up
7177 in lower case. Some resolvers return domain names in exactly the case they
7178 appear in the zone file, that is, they may contain uppercase letters. Not
7179 all resolvers do this - some return always lower case. Exim was treating a
7180 change of case by a resolver as a change of domain, similar to a widening
7181 of a domain abbreviation. This triggered its re-routing code and so it was
7182 trying to route what was effectively the same domain again. This normally
7183 caused routing to fail (because the router wouldn't handle the domain
7184 twice). Now Exim checks for this case specially, and just changes the
7185 casing of the domain that it ultimately uses when it transmits the message
7188 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7191 50. If a filter generated a file delivery with a non-absolute name (possible if
7192 no home directory exists for the router), the forbid_file option was not
7195 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7196 the existing equality matching.
7198 52. Exim was using ints instead of ino_t variables in some places where it was
7199 dealing with inode numbers.
7201 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7202 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7203 called TMPDIR, and if it finds it is different, it changes its value.
7205 54. The smtp_printf() function is now made available to local_scan() so
7206 additional output lines can be written before returning. There is also an
7207 smtp_fflush() function to enable the detection of a dropped connection.
7208 The variables smtp_input and smtp_batched_input are exported to
7211 55. Changed the default runtime configuration: the message "Unknown user"
7212 has been removed from the ACL, and instead placed on the localuser router,
7213 using the cannot_route_message feature. This means that any verification
7214 failures that generate their own messages won't get overridden. Similarly,
7215 the "Unrouteable address" message that was in the ACL for unverifiable
7216 relay addresses has also been removed.
7218 56. Added hosts_avoid_esmtp to the smtp transport.
7220 57. The exicyclog script was not checking for the esoteric option
7221 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7222 will work only if exicyclog is run under the appropriate euid.
7224 58. Following a discussion on the list, the rules by which Exim recognises line
7225 endings on incoming messages have been changed. The -dropcr and drop_cr
7226 options are now no-ops, retained only for backwards compatibility. The
7227 following line terminators are recognized: LF CRLF CR. However, special
7228 processing applies to CR:
7230 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7231 nor a local message in the state where . is a terminator.
7233 (ii) If a bare CR is encountered in a header line, an extra space is added
7234 after the line terminator so as not to end the header. The reasoning
7235 behind this is that bare CRs in header lines are most likely either
7236 to be mistakes, or people trying to play silly games.
7238 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7239 was being incorrectly given as 18 bytes larger than it should have been.
7240 This is a VOB (very old bug).
7242 60. This may never have affected anything current, but just in case it has:
7243 When the local host is found other than at the start of a list of hosts,
7244 the local host, those with the same MX, and any that follow, are discarded.
7245 When the list in question was part of a longer list of hosts, the following
7246 hosts (not currently being processed) were also being discarded. This no
7247 longer happens. I'm not sure if this situation could ever has previously
7250 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7253 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7254 header. This is something that is recommended in a new Internet Draft, and
7255 is something that is documented as being done by Sendmail. There are two
7256 possible values. For messages generated by the autoreply transport, Exim
7259 Auto-Submitted: auto-replied
7261 whereas for all other generated messages (e.g. bounces) it adds
7263 Auto-Submitted: auto-generated
7265 63. The "personal" condition in filters now includes a test for the
7266 Auto-Submitted: header. If it contains the string "auto-" the message it
7267 not considered personal.
7269 64. Added rcpt_include_affixes as a generic transport option.
7271 65. Added queue_only_override (default true).
7273 66. Added the syslog_duplication option.
7275 67. If what should have been the first header line of a message consisted of
7276 a space followed by a colon, Exim was mis-interpreting it as a header line.
7277 It isn't of course - it is syntactically invalid and should therefore be
7278 treated as the start of the message body. The misbehaviour could have
7279 caused a number of strange effects, including loss of data in subsequent
7280 header lines, and spool format errors.
7282 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7283 client host had authenticated. This control can now be exercised by an ACL
7284 for more flexibility.
7286 69. By default, callouts do not happen when testing with -bh. There is now a
7287 variant, -bhc, which does actually run the callout code, including
7288 consulting and updating the callout cache.
7290 70. Added support for saslauthd authentication, courtesy of Alexander
7293 71. If statvfs() failed on the spool or log directories while checking their
7294 size for availability, Exim confusingly gave the error "space shortage".
7295 Furthermore, in debugging mode it crashed with a floating point exception.
7296 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7297 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7298 serious problem, Exim now writes to the main and panic logs when this
7299 happens, with details of the failure. It then refuses to accept the
7300 incoming message, giving the message "spool directory problem" or "log
7301 directory problem" with a 421 code for SMTP messages.
7303 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7304 0, 1, and 2 exist, because some OS complain for execs without them (see
7305 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7306 descriptors. However, the code omitted to check that the open succeeded,
7307 causing mysterious errors if for some reason the permissions on /dev/null
7308 got screwed. Now Exim writes a message to the main and panic logs, and
7309 bombs out if it can't open /dev/null.
7311 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7312 interact so that it is all more flexible. It is supposed to remain
7313 backwards compatible. Also added extra_local_interfaces.
7315 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7316 to bomb out with an assertion failure - to the client this appears as a
7317 connection drop. This problem occurs in the part of the code that was taken
7318 from the Samba project. Fortunately, the assertion is in a very simple
7319 function, so I have fixed this by reproducing the function inline in the
7320 one place where it is called, and arranging for authentication to fail
7321 instead of killing the process with assert().
7323 75. The SPA client code was not working when the server requested OEM rather
7324 than Unicode encoding.
7326 76. Added code to make require_files with a specific uid setting more usable in
7327 the case where statting the file as root fails - usually a non-root-mounted
7328 NFS file system. When this happens and the failure is EACCES, Exim now
7329 forks a subprocess and does the per-uid checking as the relevant uid.
7331 77. Added process_log_path.
7333 78. If log_file_path was not explicitly set, a setting of check_log_space or
7334 check_log_inodes was ignored.
7336 79. If a space check for the spool or log partitions fails, the incident is now
7337 logged. Of course, in the latter case the data may get lost...
7339 80. Added the %p formatting code to string_format() so that it can be used to
7340 print addresses in debug_print(). Adjusted all the address printing in the
7341 debugging in store.c to use %p rather than %d.
7343 81. There was a concern that a line of code in smtp_in.c could overflow a
7344 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7345 initially expressed, the concern was not well-founded, because trailing
7346 spaces are removed early. However, if the trailing spaces were followed by
7347 a NULL, they did not get removed, so the overflow was possible. Two fixes
7350 (a) I re-wrote the offending code in a cleaner fashion.
7351 (b) If an incoming SMTP command contains a NULL character, it is rejected
7354 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7355 runs initgroups(), so that if the Exim user is in any additional groups,
7356 they will be used during message reception.
7362 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob