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
21 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
27 JH/01 Remove code calling the customisable local_scan function, unless a new
28 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
30 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
31 non-signal-safe functions being used.
33 JH/03 Bug 2269: When presented with a received message having a stupidly large
34 number of DKIM-Signature headers, disable DKIM verification to avoid
35 a resource-consumption attack. The limit is set at twenty.
37 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
38 report of oldest_pass in ${authres } in consequence, and separate out
39 some descriptions of reasons for verification fail.
41 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
42 files in the spool were present and unlocked. A queue-runner could spot
43 them, resulting in a duplicate delivery. Fix that by doing the unlock
44 after the unlink. Investigation by Tim Stewart. Take the opportunity to
45 add more error-checking on spoolfile handling while that code is being
48 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
49 No known attacks, no CVE, this is defensive hardening.
51 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
52 a queue-runner could start a delivery while other operations were ongoing.
53 Cutthrough delivery was a common victim, resulting in duplicate delivery.
54 Found and investigated by Tim Stewart. Fix by using the open message data
55 file handle rather than opening another, and not locally closing it (which
56 releases a lock) for that case, while creating the temporary .eml format
57 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
59 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
60 $sender_verify_failure/$recipient_verify_failure to "random".
62 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
65 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
66 Previously this would segfault.
68 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
71 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
72 like zero, since the resolver should be doing this for us, But we need one
73 as a CNAME but no MX presence gets the CNAME returned; we need to check
74 that doesn't point to an MX to declare it "no MX returned" rather than
75 "error, loop". A new main option is added so the older capability of
76 following some limited number of chain links is maintained.
78 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
80 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
81 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
82 now-deprecated earlier definitions used only specified the range up to TLS
83 1.2 (in the older-version library docs).
85 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
87 JH/15 Rework TLS client-side context management. Stop using a global, and
88 explicitly pass a context around. This enables future use of TLS for
89 connections to service-daemons (eg. malware scanning) while a client smtp
90 connection is using TLS; with cutthrough connections this is quite likely.
92 JH/16 Fix ARC verification to do AS checks in reverse order.
94 JH/17 Support a "tls" option on the ${readsocket } expansion item.
96 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
97 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
98 Previously the "utf8" would be re-prepended for every additional message.
100 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
101 Previously thery were accepted, resulting in issues when attempting to
102 forward messages to a non-supporting MTA.
104 PP/02 Let -n work with printing macros too, not just options.
106 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
107 one parent address was copied, and bogus data was used at delivery-logging
108 time. Either a crash (after delivery) or bogus log data could result.
109 Discovery and analysis by Tim Stewart.
111 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
112 Previously if the string ended mid-character, we did not insert the
113 promised '?' replacement.
115 PP/04 Documentation: current string operators work on bytes, not codepoints.
117 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
118 should pack well giving a smaller memory footprint so better caching and
119 therefore performance. Group the declarations where this can't be done so
120 that the byte-sized flag variables are not interspersed among pointer
121 variables, giving a better chance of good packing by the compiler.
123 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
124 non-null, to avoid issues with sites running BATV. Previously reports were
125 sent with an empty envelope sender so looked like bounces.
127 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
128 The ignore_error flag wasn't being returned from the filter subprocess so
129 was not set for later routers. Investigation and fix by Matthias Kurz.
131 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
132 and a msg:complete for the whole, when a message is manually removed using
133 -Mrm. Developement by Matthias Kurz, hacked on by JH.
135 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
136 a "Gnu special" function, asprintf() in the DB utility binary builds; I
137 hope that is portable enough.
139 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
140 requiring a known-CA anchor certificate; make it now rely entirely on the
141 TLSA as an anchor. Checking the name on the leaf cert against the name
142 on the A-record for the host is still done for TA (but not for EE mode).
144 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
145 included in delivery lines for non-proxied connections, when compiled with
146 SUPPORT_SOCKS and running with proxy logging enabled.
148 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
149 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
150 move the existing event to fire before the normal logging of message
151 failure so that custom logging is bracketed by normal logging.
153 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
154 msg:fail:internal event. Developement by Matthias Kurz.
156 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
157 far too small for todays use of crypto signatures stored there. Go all
158 the way to the max DNS message size of 64kB, even though this might be
159 overmuch for IOT constrained device use.
161 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
162 copy a string over itself. The library routine is documented as not
163 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
165 JH/32 For main options check_spool_space and check_inode_space, where the
166 platform supports 64b integers, support more than the previous 2^31 kB
167 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
168 the previous G, M, k.
170 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
171 $authenticated_fail_id variable on authentication failure. Previously
174 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
175 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
176 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
177 GNUTLS_SEC_PARAM_MEDIUM.
179 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
180 side. Previously we would continue as if no SNI had been received.
182 JH/36 Harden the handling of string-lists. When a list consisted of a sole
183 "<" character, which should be a list-separator specification, we walked
184 off past the nul-terimation.
186 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
187 causes) even when the retry time is not yet met. Previously they were
188 not, meaning that when (say) an account was over-quota and temp-rejecting,
189 and multiple senders' messages were queued, only one sender would get
190 notified on each configured delay_warning cycle.
192 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they return error
193 codes indicating retry. Under TLS1.3 this becomes required.
199 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
200 When redis_servers is set to a list of > 1 element, and the Redis servers
201 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
202 case of MOVED into a DEFER case instead, thus moving the query onto the
203 next server in the list. For a cluster of N elements, all N servers must
204 be defined in redis_servers.
206 GF/02 Catch and remove uninitialized value warning in exiqsumm
207 Check for existence of @ARGV before looking at $ARGV[0]
209 JH/01 Replace the store_release() internal interface with store_newblock(),
210 which internalises the check required to safely use the old one, plus
211 the allocate and data copy operations duplicated in both (!) of the
212 extant use locations.
214 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
215 modifier. This matches the restriction on the commandline.
217 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
218 Previously only the last row was returned.
220 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
221 we assumed that tags in the header were well-formed, and parsed the
222 element content after inspecting only the first char of the tag.
223 Assumptions at that stage could crash the receive process on malformed
226 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
227 While running the DKIM ACL we operate on the Permanent memory pool so that
228 variables created with "set" persist to the DATA ACL. Also (at any time)
229 DNS lookups that fail create cache records using the Permanent pool. But
230 expansions release any allocations made on the current pool - so a dnsdb
231 lookup expansion done in the DKIM ACL releases the memory used for the
232 DNS negative-cache, and bad things result. Solution is to switch to the
233 Main pool for expansions.
234 While we're in that code, add checks on the DNS cache during store_reset,
235 active in the testsuite.
236 Problem spotted, and debugging aided, by Wolfgang Breyha.
238 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
239 When none of the hosts presented to a transport match an already-open
240 connection, close it and proceed with the list. Previously we would
241 queue the message. Spotted by Lena with Yahoo, probably involving
244 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
245 Previously a spurious "250 OK id=" response was appended to the proper
248 JH/08 The "support for" informational output now, which built with Content
249 Scanning support, has a line for the malware scanner interfaces compiled
250 in. Interface can be individually included or not at build time.
252 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
253 by the template makefile "src/EDITME". The "STREAM" support for an older
254 ClamAV interface method is removed.
256 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
257 rows affected is given instead).
259 JH/11 The runtime Berkeley DB library version is now additionally output by
260 "exim -d -bV". Previously only the compile-time version was shown.
262 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
263 SMTP connection. Previously, when one had more receipients than the
264 first, an abortive onward connection was made. Move to full support for
265 multiple onward connections in sequence, handling cutthrough connection
266 for all multi-message initiating connections.
268 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
269 routers. Previously, a multi-recipient message would fail to match the
270 onward-connection opened for the first recipient, and cause its closure.
272 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
273 a timeout on read on a GnuTLS initiating connection, resulting in the
274 initiating connection being dropped. This mattered most when the callout
275 was marked defer_ok. Fix to keep the two timeout-detection methods
278 JH/15 Relax results from ACL control request to enable cutthrough, in
279 unsupported situations, from error to silently (except under debug)
280 ignoring. This covers use with PRDR, frozen messages, queue-only and
283 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
285 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
286 metadata, resulting in a crash in free().
288 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
289 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
290 Broken also in d185889f4, with init system revamp.
292 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
293 Previously we abruptly closed the connection after reading a malware-
294 found indication; now we go on to read the "scan ok" response line,
297 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
298 ACL. Previously, a crash would result.
300 JH/19 Speed up macro lookups during configuration file read, by skipping non-
301 macro text after a replacement (previously it was only once per line) and
302 by skipping builtin macros when searching for an uppercase lead character.
304 JH/20 DANE support moved from Experimental to mainline. The Makefile control
305 for the build is renamed.
307 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
308 was allocated for every new TLS startup, meaning one per message. Fix
309 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
311 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
312 reported the original. Fix to report (as far as possible) the ACL
313 result replacing the original.
315 JH/23 Fix memory leak during multi-message connections using STARTTLS under
316 OpenSSL. Certificate information is loaded for every new TLS startup,
317 and the resources needed to be freed.
319 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
321 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
324 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
325 DATA response info to the (existing) per-recipient response info for
326 the "C=" log element. It can have useful tracking info from the
327 destination system. Patch from Simon Arlott.
329 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
330 length value. Previously this would segfault.
332 HS/02 Support Avast multiline protoocol, this allows passing flags to
333 newer versions of the scanner.
335 JH/28 Ensure that variables possibly set during message acceptance are marked
336 dead before release of memory in the daemon loop. This stops complaints
337 about them when the debug_store option is enabled. Discovered specifically
338 for sender_rate_period, but applies to a whole set of variables.
339 Do the same for the queue-runner and queue-list loops, for variables set
340 from spool message files. Do the same for the SMTP per-message loop, for
341 certain variables indirectly set in ACL operations.
343 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
344 as a multi-recipient message from a mailinglist manager). The coding had
345 an arbitrary cutoff number of characters while checking for more input;
346 enforced by writing a NUL into the buffer. This corrupted long / fast
347 input. The problem was exposed more widely when more pipelineing of SMTP
348 responses was introduced, and one Exim system was feeding another.
349 The symptom is log complaints of SMTP syntax error (NUL chars) on the
350 receiving system, and refused recipients seen by the sending system
351 (propating to people being dropped from mailing lists).
352 Discovered and pinpointed by David Carter.
354 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
355 replaced by the ${authresults } expansion.
357 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
359 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
360 allows proper process termination in container environments.
362 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
363 Previously the "final dot" had a newline after it; ensure it is CR,LF.
365 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
366 and "err_perm", deprecated since 4.83 when the RFC-defined words
367 "temperror" and "permerror" were introduced.
369 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
370 transport-filters or DKIM-signing. The restriction was lost in the
371 consolidation of verify-callout and delivery SMTP handling.
372 Extend the restriction to also cover ARC-signing.
374 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
375 in defer=pass mode supply a 450 to the initiator. Previously the message
378 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
379 tls_require_ciphers is used as before.
381 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
382 "pass_unscanned". Only tmpfails from the scanner are written to
383 the paniclog, as they may require admin intervention (permission
384 denied, license issues). Other scanner errors (like decompression
385 bombs) do not cause a paniclog entry.
387 JH/36 Fix reinitialisation of DKIM logging variable between messages.
388 Previously it was possible to log spurious information in receive log
391 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
392 triggered odd behaviour from Outlook Express clients.
394 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
397 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
398 since the IETF WG has not yet settled on that versus the original
399 "bare" representation.
401 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
402 Previously the millisecond value corrupted the output.
403 Fix also for syslog_pid=no and log_selector +pid, for which the pid
404 corrupted the output.
410 JH/01 Rework error string handling in TLS interface so that the caller in
411 more cases is responsible for logging. This permits library-sourced
412 string to be attached to addresses during delivery, and collapses
413 pairs of long lines into single ones.
415 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
416 during configuration. Wildcards are allowed and expanded.
418 JH/02 Rework error string handling in DKIM to pass more info back to callers.
419 This permits better logging.
421 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
422 do not close it down and have the child transport start it up again on
423 the passed-on TCP connection. Instead, proxy the child (and any
424 subsequent ones) for TLS via a unix-domain socket channel. Logging is
425 affected: the continued delivery log lines do not have any DNSSEC, TLS
426 Certificate or OCSP information. TLS cipher information is still logged.
428 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
429 identical IP addresses on different listening ports. Will also affect
432 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
433 add noisy ifdef guards to special-case this sillyness.
434 Patch from Bernd Kuhls.
436 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
437 than 255 are no longer allowed.
439 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
440 Disable the session-cache too, which might reduce our load. Since we
441 currrectly use a new context for every connection, both as server and
442 client, there is no benefit for these.
443 GnuTLS appears to not support tickets server-side by default (we don't
444 call gnutls_session_ticket_enable_server()) but client side is enabled
445 by default on recent versions (3.1.3 +) unless the PFS priority string
448 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
449 <https://reproducible-builds.org/specs/source-date-epoch/>.
451 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
452 the check for any unsuccessful recipients did not notice the limit, and
453 erroneously found still-pending ones.
455 JH/08 Pipeline CHUNKING command and data together, on kernels that support
456 MSG_MORE. Only in-clear (not on TLS connections).
458 JH/09 Avoid using a temporary file during transport using dkim. Unless a
459 transport-filter is involved we can buffer the headers in memory for
460 creating the signature, and read the spool data file once for the
461 signature and again for transmission.
463 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
464 4.77 as the kernel support then wasn't solid, having issues in 64bit
465 mode. Now, it's been long enough. Add support for FreeBSD also.
467 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
468 case where the routing stage had gathered several addresses to send to
469 a host before calling the transport for the first, we previously failed
470 to close down TLS in the old transport process before passing the TCP
471 connection to the new process. The new one sent a STARTTLS command
472 which naturally failed, giving a failed delivery and bloating the retry
473 database. Investigation and fix prototype from Wolfgang Breyha.
475 JH/12 Fix check on SMTP command input synchronisation. Previously there were
476 false-negatives in the check that the sender had not preempted a response
477 or prompt from Exim (running as a server), due to that code's lack of
478 awareness of the SMTP input buffering.
480 PP/04 Add commandline_checks_require_admin option.
481 Exim drops privileges sanely, various checks such as -be aren't a
482 security problem, as long as you trust local users with access to their
483 own account. When invoked by services which pass untrusted data to
484 Exim, this might be an issue. Set this option in main configuration
485 AND make fixes to the calling application, such as using `--` to stop
488 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
489 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
490 responses to those, into a single TLS record each way (this usually means
491 a single packet). As a side issue, smtp_enforce_sync now works on TLS
494 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
495 affects you only if you're dancing at the edge of the param size limits.
496 If you are, and this message makes sense to you, then: raise the
497 configured limit or use OpenSSL 1.1. Nothing we can do for older
500 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
501 cmdline element to get the documented default one. Previously it was
504 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
505 are unsuable for non-message-specific reasons - eg. connection timeout,
506 banner-time rejection.
508 JH/16 Fix logging of delivery remote port, when specified by router, under
511 PP/06 Repair manualroute's ability to take options in any order, even if one
512 is the name of a transport.
515 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
517 JH/17 Change the list-building routines interface to use the expanding-string
518 triplet model, for better allocation and copying behaviour.
520 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
521 Previously it was constructed the first time a possibly-matching string
522 was met in the configuration file input during startup; now it is done
525 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
526 compatible one, to avoid the (poorly documented) possibility of a config
527 file in the working directory redirecting the DB files, possibly correpting
528 some existing file. CVE-2017-10140 assigned for BDB.
530 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
531 cache-hot. Previously, although the result was properly cached, the
532 initial verify call returned a defer.
534 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
535 the main verify for receipient in uncached-mode.
537 JH/22 Retire historical build files to an "unsupported" subdir. These are
538 defined as "ones for which we have no current evidence of testing".
540 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
541 if present. Previously it was ignored.
543 JH/24 Start using specified-initialisers in C structure init coding. This is
544 a C99 feature (it's 2017, so now considered safe).
546 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
547 if was a fixed-sized field and bitmask ops via macros; it is now more
550 PP/07 GitHub PR 56: Apply MariaDB build fix.
551 Patch provided by Jaroslav Å karvada.
553 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
554 during Coverity cleanups [4.87 JH/47]
555 Diagnosis and fix provided by Michael Fischer v. Mollard.
557 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
558 the right size to place the terminating semicolon on its own folded
559 line, the header hash was calculated to an incorrect value thanks to
560 the (relaxed) space the fold became.
562 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
563 and confused the parent.
565 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
566 which could crash as a result. This could lead to undeliverable messages.
568 JH/28 Logging: "next input sent too soon" now shows where input was truncated
571 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
572 matters on fast-turnover and PID-randomising systems, which were getting
573 out-of-order delivery.
575 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
576 a possibly-overlapping copy. The symptom was that "Remote host closed
577 connection in response to HELO" was logged instead of the actual 4xx
580 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
581 Previously only that bufferd was discarded, resulting in SYMTP command
584 JH/32 DKIM: when a message has multiple signatures matching an identity given
585 in dkim_verify_signers, run the dkim acl once for each. Previously only
586 one run was done. Bug 2189.
588 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
589 "panic the current process" to "deliberately defer". The panic log is
590 still written with the problem list name; the mail and reject logs now
591 get a temp-reject line for the message that was being handled, saying
592 something like "domains check lookup or other defer". The SMTP 451
593 message is still "Temporary local problem".
595 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
596 A crafted sequence of BDAT commands could result in in-use memory beeing
597 freed. CVE-2017-16943.
599 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
600 from SMTP input. Previously it was always done; now only done for DATA
601 and not BDAT commands. CVE-2017-16944.
603 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
604 to the message (such as an overlong header line). Previously this was
605 not done and we did not exit BDAT mode. Followon from the previous item
606 though a different problem.
612 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
613 than -2003 did; needs libidn2 in addition to libidn.
615 JH/02 The path option on a pipe transport is now expanded before use.
617 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
618 Patch provided by "Björn", documentation fix added too.
620 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
621 missing a wire-to-host endian conversion.
623 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
624 close after a BDAT command line could be taken as a following command,
625 giving a synch failure. Fix by only checking for synch immediately
626 before acknowledging the chunk.
628 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
629 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
630 macro. Patches provided by Josh Soref.
632 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
633 Previously we did not; the RFC seems ambiguous and VRFY is not listed
634 by IANA as a service extension. However, John Klensin suggests that we
637 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
638 the dkim code may be unix-mode line endings rather than smtp wire-format
639 CRLF, so prepend a CR to any bare LF.
641 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
642 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
644 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
645 the first were themselves being wrongly included in the feed into dkim
646 processing; with most chunk sizes in use this resulted in an incorrect
647 body hash calculated value.
649 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
650 DKIM signature block, for verification. Although advised against by
651 standards it is specifically not ruled illegal.
653 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
655 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
656 missing a body hash (the bh= tag).
658 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
659 It seems that HAProxy sends the Proxy Protocol information in clear and
660 only then does a TLS startup, so do the same.
662 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
663 TCP connections (such as for Spamd) unless the daemon successfully set
664 Fast Open mode on its listening sockets. This fixes breakage seen on
665 too-old kernels or those not configured for Fast Open, at the cost of
666 requiring both directions being enabled for TFO, and TFO never being used
667 by non-daemon-related Exim processes.
669 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
670 endings, at least on the first header line. Try to canonify any that get
671 past that check, despite the cost.
673 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
674 now limited to an arbitrary five deep, while parsing addresses with the
675 strip_excess_angle_brackets option enabled.
677 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
678 instead leave the unprompted TLS handshake in socket buffer for the
679 TLS library to consume.
681 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
683 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
685 JH/16 Drop variables when they go out of scope. Memory management drops a whole
686 region in one operation, for speed, and this leaves assigned pointers
687 dangling. Add checks run only under the testsuite which checks all
688 variables at a store-reset and panics on a dangling pointer; add code
689 explicitly nulling out all the variables discovered. Fixes one known
690 bug: a transport crash, where a dangling pointer for $sending_ip_address
691 originally assigned in a verify callout, is re-used.
693 PP/06 Drop '.' from @INC in various Perl scripts.
695 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
697 PP/08 Reduce a number of compilation warnings under clang; building with
698 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
699 should be warning-free.
701 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
703 HS/01 Fix portability problems introduced by PP/08 for platforms where
704 realloc(NULL) is not equivalent to malloc() [SunOS et al].
706 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
707 chunk. This allows us to accept broken chunked messages. We need a more
708 general solution here.
710 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
711 already-broken messages in the queue.
713 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
715 JH/19 Fix reference counting bug in routing-generated-address tracking.
721 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
722 supports it and a size is available (ie. the sending peer gave us one).
724 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
725 years of being deprecated). The replacements are the ACLs
726 acl_smtp_mime and acl_not_smtp_mime.
728 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
729 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
730 or even an in-clear connection were permitted. Now, if the host lookup
731 was dnssec and dane was requested then the host is only used if the
732 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
733 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
734 if one fails this test.
735 This means that a poorly-configured remote DNS will make it incommunicado;
736 but it protects against a DNS-interception attack on it.
738 JH/04 Bug 1810: make continued-use of an open smtp transport connection
739 non-noisy when a race steals the message being considered.
741 JH/05 If main configuration option tls_certificate is unset, generate a
742 self-signed certificate for inbound TLS connections.
744 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
745 in rewrites and routers.
747 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
748 and logged a warning sing 4.83; now they are a configuration file error.
750 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
751 (lacking @domain). Apply the same qualification processing as RCPT.
753 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
755 JH/10 Support ${sha256:} applied to a string (as well as the previous
758 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
759 a cutthrough deliver is pending, as we always want to make a connection.
760 This also avoids re-routing the message when later placing the cutthrough
761 connection after a verify cache hit.
762 Do not update it with the verify result either.
764 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
765 when routing results in more than one destination address.
767 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
768 signing (which inhibits the cutthrough capability). Previously only
769 the presence of an option was tested; now an expansion evaluating as
770 empty is permissible (obviously it should depend only on data available
771 when the cutthrough connection is made).
773 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
774 the relevant preceding SMTP command did not note the pipelining mode.
776 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
777 Previously they were not counted.
779 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
780 as one having no matching records. Previously we deferred the message
781 that needed the lookup.
783 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
784 distinguished as "(=".
786 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
787 for missing MX records. Previously it only worked for missing A records.
789 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
791 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
792 after the data-go-ahead and data-ack. Patch from Jason Betts.
794 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
795 even for a "none" policy. Patch from Tony Meyer.
797 JH/22 Fix continued use of a connection for further deliveries. If a port was
798 specified by a router, it must also match for the delivery to be
801 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
802 When one of the recipients of a message was unsuitable for the connection
803 (has no matching addresses), we lost track of needing to mark it
804 deferred. As a result mail would be lost.
806 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
808 JH/25 Decoding ACL controls is now done using a binary search; the source code
809 takes up less space and should be simpler to maintain. Merge the ACL
810 condition decode tables also, with similar effect.
812 JH/26 Fix problem with one_time used on a redirect router which returned the
813 parent address unchanged. A retry would see the parent address marked as
814 delivered, so not attempt the (identical) child. As a result mail would
817 JH/27 Fix a possible security hole, wherein a process operating with the Exim
818 UID can gain a root shell. Credit to http://www.halfdog.net/ for
819 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
822 JH/28 Enable {spool,log} filesystem space and inode checks as default.
823 Main config options check_{log,spool}_{inodes,space} are now
824 100 inodes, 10MB unless set otherwise in the configuration.
826 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
827 Previously it only applied to the main-section connection policy
830 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
832 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
833 by me. Added RFC7919 DH primes as an alternative.
835 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
836 are not in the system include path.
838 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
839 GnuTLS, when a session startup failed (eg because the client disconnected)
840 Exim did stdio operations after fclose. This was exposed by a recent
841 change which nulled out the file handle after the fclose.
843 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
844 signed directly by the cert-signing cert, rather than an intermediate
845 OCSP-signing cert. This is the model used by LetsEncrypt.
847 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
849 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
850 an incoming connection.
852 HS/02 Bug 1802: Do not half-close the connection after sending a request
855 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
856 fallback to "prime256v1".
858 JH/34 SECURITY: Use proper copy of DATA command in error message.
859 Could leak key material. Remotely exploitable. CVE-2016-9963.
865 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
866 and 3.4.4 - once the server is enabled to respond to an OCSP request
867 it does even when not requested, resulting in a stapling non-aware
868 client dropping the TLS connection.
870 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
871 support variable-length bit vectors. No functional change.
873 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
874 The I= interface field on outgoing lines is now after the H= remote
875 host field, same as incoming lines. There is a separate
876 outgoing_interface log selector which allows you to disable the
879 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
880 If not running log_selector +smtp_connection the mainlog would be held
881 open indefinitely after a "too many connections" event, including to a
882 deleted file after a log rotate. Leave the per net connection logging
883 leaving it open for efficiency as that will be quickly detected by the
884 check on the next write.
886 HS/01 Bug 1671: Fix post transport crash.
887 Processing the wait-<transport> messages could crash the delivery
888 process if the message IDs didn't exist for some reason. When
889 using 'split_spool_directory=yes' the construction of the spool
890 file name failed already, exposing the same netto behaviour.
892 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
893 mime_regex ACL conditions.
895 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
896 to DSN fail messages (bounces): remote IP, remote greeting, remote response
897 to HELO, local diagnostic string.
899 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
900 log line to debug. Even when configured with a tls authenticator many
901 client connections are expected to not authenticate in this way, so
902 an authenticate fail is not an error.
904 HS/02 Add the Exim version string to the process info. This way exiwhat
905 gives some more detail about the running daemon.
907 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
908 matter for fast-change records such as DNSBLs.
910 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
911 retry record, even if constant. There may be multiple transports with
912 different interface settings and the retry behaviour needs to be kept
915 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
917 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
919 JH/10 Bug 840: fix log_defer_output option of pipe transport
921 JH/11 Bug 830: use same host for all RCPTS of a message, even under
922 hosts_randomize. This matters a lot when combined with mua_wrapper.
924 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
925 ${quote_pgsql:<string>} operator.
927 JH/13 Bug 1708: avoid misaligned access in cached lookup.
929 JH/14 Change header file name for freeradius-client. Relevant if compiling
930 with Radius support; from the Gentoo tree and checked under Fedora.
932 JH/15 Bug 1712: Introduce $prdr_requested flag variable
934 JH/16 Bug 1714: Permit an empty string as expansion result for transport
935 option transport_filter, meaning no filtering.
937 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
939 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
940 defaults to "*" (all hosts). The variable is now available when not built
941 with TLS, default unset, mainly to enable keeping the testsuite sane.
942 If a server certificate is not supplied (via tls_certificate) an error is
943 logged, and clients will find TLS connections fail on startup. Presumably
944 they will retry in-clear.
945 Packagers of Exim are strongly encouraged to create a server certificate
946 at installation time.
948 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
949 with the $config_file variable.
951 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
952 in transport context, after the attempt, and per-recipient. The latter type
953 is per host attempted. The event data is the error message, and the errno
954 information encodes the lookup type (A vs. MX) used for the (first) host,
955 and the trailing two digits of the smtp 4xx response.
957 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
958 to write to mainlog (or rejectlog, paniclog) in the window between file
959 creation and permissions/ownership being changed. Particularly affects
960 installations where exicyclog is run as root, rather than exim user;
961 result is that the running daemon panics and dies.
963 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
965 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
966 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
967 "pri" and "weight". Note that the previous implicit priority given by the
968 list order is no longer honoured.
970 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
973 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
974 by defining SUPPORT_SOCKS.
976 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
977 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
978 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
979 variables are renamed to proxy_{local,external}_{address,port}.
981 JH/27 Move Internationalisation support from Experimental to mainline, enabled
982 for a build by defining SUPPORT_I18N
984 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
985 of the query string, and make ${quote_redis:} do that quoting.
987 JH/29 Move Events support from Experimental to mainline, enabled by default
988 and removable for a build by defining DISABLE_EVENT.
990 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
992 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
993 cached by the daemon.
995 JH/32 Move Redis support from Experimental to mainline, enabled for a build
996 by defining LOOKUP_REDIS. The libhiredis library is required.
998 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
999 keys are given for lookup.
1001 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1002 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1003 only supported when built with TLS support. The PolarSSL SHA routines
1004 are still used when the TLS library is too old for convenient support.
1006 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1007 openssl_options), for security. OpenSSL forces this from version 1.1.0
1008 server-side so match that on older versions.
1010 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1011 allocation for $value could be released as the expansion processing
1012 concluded, but leaving the global pointer active for it.
1014 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1015 and to use the domains and local_parts ACL conditions.
1017 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1018 incorrectly not doubled on cutthrough transmission, hence seen as a
1019 body-termination at the receiving system - resulting in truncated mails.
1020 Commonly the sender saw a TCP-level error, and retransmitted the message
1021 via the normal store-and-forward channel. This could result in duplicates
1022 received - but deduplicating mailstores were liable to retain only the
1023 initial truncated version.
1025 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1027 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1029 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1030 we're in there, support oversigning also; bug 1309.
1032 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1034 HS/04 Add support for keep_environment and add_environment options.
1036 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1037 either intentional arithmetic overflow during PRNG, or testing config-
1040 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1041 delivery resulted in actual delivery. Cancel cutthrough before DATA
1044 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1045 rejects a recipient: pass the reject to the originator.
1047 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1048 Many were false-positives and ignorable, but it's worth fixing the
1051 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1052 for the new environment-manipulation done at startup. Move the routines
1053 from being local to tls.c to being global via the os.c file.
1055 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1056 an extract embedded as result-arg for a map, the first arg for extract
1057 is unavailable so we cannot tell if this is a numbered or keyed
1058 extraction. Accept either.
1064 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1067 JH/02 The smtp transport option "multi_domain" is now expanded.
1069 JH/03 The smtp transport now requests PRDR by default, if the server offers
1072 JH/04 Certificate name checking on server certificates, when exim is a client,
1073 is now done by default. The transport option tls_verify_cert_hostnames
1074 can be used to disable this per-host. The build option
1075 EXPERIMENTAL_CERTNAMES is withdrawn.
1077 JH/05 The value of the tls_verify_certificates smtp transport and main options
1078 default to the word "system" to access the system default CA bundle.
1079 For GnuTLS, only version 3.0.20 or later.
1081 JH/06 Verification of the server certificate for a TLS connection is now tried
1082 (but not required) by default. The verification status is now logged by
1083 default, for both outbound TLS and client-certificate supplying inbound
1086 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1089 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1090 Status Notification (bounce) messages are now MIME format per RFC 3464.
1091 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1092 under the control of the dsn_advertise_hosts option, and routers may
1093 have a dsn_lasthop option.
1095 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1096 default, modifiable by a malware= option. The list separator for
1097 the options can now be changed in the usual way. Bug 68.
1099 JH/10 The smtp_receive_timeout main option is now expanded before use.
1101 JH/11 The incoming_interface log option now also enables logging of the
1102 local interface on delivery outgoing connections.
1104 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1105 if the interface and destination host and port all match.
1107 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1110 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1111 Patch from Andrew Lewis.
1113 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1114 now supports optional time-restrictions, weighting, and priority
1115 modifiers per server. Patch originally by <rommer@active.by>.
1117 JH/16 The spamd_address main option now supports a mixed list of local
1118 and remote servers. Remote servers can be IPv6 addresses, and
1119 specify a port-range.
1121 JH/17 Bug 68: The spamd_address main option now supports an optional
1122 timeout value per server.
1124 JH/18 Bug 1581: Router and transport options headers_add/remove can
1125 now have the list separator specified.
1127 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1130 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1133 JH/21 Support for the A6 type of dns record is withdrawn.
1135 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1136 rather than the verbs used.
1138 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1139 from 255 to 1024 chars.
1141 JH/24 Verification callouts now attempt to use TLS by default.
1143 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1144 are generic router options now. The defaults didn't change.
1146 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1147 Original patch from Alexander Shikoff, worked over by JH.
1149 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1150 files if ZCAT_COMMAND is not executable.
1152 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1154 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1156 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1157 Normally benign, it bites when the pair was led to by a CNAME;
1158 modern usage is to not canonicalize the domain to a CNAME target
1159 (and we were inconsistent anyway for A-only vs AAAA+A).
1161 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1163 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1164 when evaluating $sender_host_dnssec.
1166 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1167 $sender_helo_dnssec variable.
1169 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1171 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1173 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1175 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1176 documented as working, but never had. Support all but $spam_report.
1178 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1179 added for tls authenticator.
1181 HS/03 Add perl_taintmode main config option
1187 TL/01 When running the test suite, the README says that variables such as
1188 no_msglog_check are global and can be placed anywhere in a specific
1189 test's script, however it was observed that placement needed to be near
1190 the beginning for it to behave that way. Changed the runtest perl
1191 script to read through the entire script once to detect and set these
1192 variables, reset to the beginning of the script, and then run through
1193 the script parsing/test process like normal.
1195 TL/02 The BSD's have an arc4random API. One of the functions to induce
1196 adding randomness was arc4random_stir(), but it has been removed in
1197 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1198 function when detected.
1200 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1201 cause callback expansion.
1203 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1204 syntax errors in an expansion can be treated as a string instead of
1205 logging or causing an error, due to the internal use of bool_lax
1206 instead of bool when processing it.
1208 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1209 server certificates when making smtp deliveries.
1211 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1213 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1215 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1217 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1218 Merged patch from Sebastian Wiedenroth.
1220 JH/05 Fix results-pipe from transport process. Several recipients, combined
1221 with certificate use, exposed issues where response data items split
1222 over buffer boundaries were not parsed properly. This eventually
1223 resulted in duplicates being sent. This issue only became common enough
1224 to notice due to the introduction of connection certificate information,
1225 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1227 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1228 size buffer was used, resulting in syntax errors when an expansion
1231 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1232 version 3.3.6 or later.
1234 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1235 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1236 both become "event_action", the variables become $event_name, $event_data
1237 and $event_defer_errno. There is a new variable $verify_mode, usable in
1238 routers, transports and related events. The tls:cert event is now also
1239 raised for inbound connections, if the main configuration event_action
1242 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1243 early OCSP support, but no stapling (appears to be less than 1.0.0).
1245 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1246 server certificate names available under the smtp transport option
1247 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1250 JH/10 Time-related extraction expansions from certificates now use the main
1251 option "timezone" setting for output formatting, and are consistent
1252 between OpenSSL and GnuTLS compilations. Bug 1541.
1254 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1255 encoded parameter in the incoming message. Bug 1558.
1257 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1258 include certificate info, eximon was claiming there were spoolfile
1261 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1263 JH/14 Log delivery-related information more consistently, using the sequence
1264 "H=<name> [<ip>]" wherever possible.
1266 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1267 are problematic for Debian distribution, omit them from the release
1270 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1272 JH/16 Fix string representation of time values on 64bit time_t architectures.
1275 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1276 output list separator was used.
1281 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1282 checkers that were complaining about end of non-void function with no
1285 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1286 This was a regression introduced in 4.83 by another bugfix.
1288 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1290 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1291 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1297 TF/01 Correctly close the server side of TLS when forking for delivery.
1299 When a message was received over SMTP with TLS, Exim failed to clear up
1300 the incoming connection properly after forking off the child process to
1301 deliver the message. In some situations the subsequent outgoing
1302 delivery connection happened to have the same fd number as the incoming
1303 connection previously had. Exim would try to use TLS and fail, logging
1304 a "Bad file descriptor" error.
1306 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1307 utilities have not been installed.
1309 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1310 temporary space as the ACL may create new global variables.
1312 TL/01 LDAP support uses per connection or global context settings, depending
1313 upon the detected version of the libraries at build time.
1315 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1316 to extract and use the src ip:port in logging and expansions as if it
1317 were a direct connection from the outside internet. PPv2 support was
1318 updated based on HAProxy spec change in May 2014.
1320 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1322 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1323 Properly escape header and check for NULL return.
1325 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1328 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1330 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1331 characters in header names, implemented as a verify condition.
1332 Contributed by Michael Fischer v. Mollard.
1334 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1335 results permerror and temperror. Previous values are deprecated but
1336 still accepted. In a future release, err_perm and err_temp will be
1337 completely removed, which will be a backward incompatibility if the
1338 ACL tests for either of these two old results. Patch contributed by
1339 user bes-internal on the mailing list.
1341 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1343 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1344 selectors, in both main and reject logs.
1346 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1349 JH/07 Add malware type "sock" for talking to simple daemon.
1351 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1353 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1354 routers/transports under cutthrough routing.
1356 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1357 numbers. Touch up "bool" conditional to keep the same definition.
1359 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1361 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1363 JH/12 Expand items in router/transport headers_add or headers_remove lists
1364 individually rather than the list as a whole. Bug 1452.
1366 Required for reasonable handling of multiple headers_ options when
1367 they may be empty; requires that headers_remove items with embedded
1368 colons must have them doubled (or the list-separator changed).
1370 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1371 view the policy declared in the DMARC record. Currently, $dmarc_status
1372 is a combined value of both the record presence and the result of the
1375 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1377 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1378 dnslookup router and the smtp transport (applying to the forward
1381 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1382 of ldap servers used for a specific lookup. Patch provided by Heiko
1385 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1386 New variable $lookup_dnssec_authenticated for observability.
1388 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1389 Patch submitted by Lars Timman.
1391 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1393 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1394 Requires trusted mode and valid format message id, aborts otherwise.
1395 Patch contributed by Heiko Schlichting.
1397 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1398 certextract with support for various fields. Bug 1358.
1400 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1401 is requested by default, modifiable by smtp transport option
1404 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1405 operate on certificate variables to give certificate fingerprints
1406 Also new ${sha256:cert_variable}.
1408 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1410 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1411 Christian Aistleitner.
1413 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1415 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1416 file. Patch from Wolfgang Breyha.
1418 JH/25 Expand the coverage of the delivery $host and $host_address to
1419 client authenticators run in verify callout. Bug 1476.
1421 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1422 align with daemon_smtp_ports. Bug 72.
1424 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1425 support and error reporting did not work properly.
1427 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1428 and is readable. Patch from Andrew Colin Kissa.
1430 TL/14 Enhance documentation of ${run expansion and how it parses the
1431 commandline after expansion, particularly in the case when an
1432 unquoted variable expansion results in an empty value.
1434 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1436 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1437 by renaming away from it. Addresses GH issue 15, reported by
1440 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1442 TL/15 SECURITY: prevent double expansion in math comparison functions
1443 (can expand unsanitized data). Not remotely exploitable.
1450 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1452 PP/02 Make -n do something, by making it not do something.
1453 When combined with -bP, the name of an option is not output.
1455 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1458 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1459 $sender_host_name and config options to manage this, and basic check
1462 PP/05 DSCP support for outbound connections and control modifier for inbound.
1464 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1465 (Only plugin which currently uses this is kerberos4, which nobody should
1466 be using, but we should make it available and other future plugins might
1467 conceivably use it, even though it would break NAT; stuff *should* be
1468 using channel bindings instead).
1470 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1471 name; added for Sendmail compatibility; requires admin caller.
1472 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1473 just ignore it); requires trusted caller.
1474 Also parse but ignore: -Ac -Am -X<logfile>
1477 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1479 TL/02 Add +smtp_confirmation as a default logging option.
1481 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1482 Patch by Magnus Holmgren from 2007-02-20.
1484 TL/04 Bugzilla 1281 - Spec typo.
1485 Bugzilla 1283 - Spec typo.
1486 Bugzilla 1290 - Spec grammar fixes.
1488 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1490 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1492 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1493 mailing list by by Dmitry Isaikin.
1495 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1497 JH/02 Support "G" suffix to numbers in ${if comparisons.
1499 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1501 NM/01 Bugzilla 1197 - Spec typo
1502 Bugzilla 1196 - Spec examples corrections
1504 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1506 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1507 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1510 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1511 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1513 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1514 "acl {{name}{arg}...}", and optional args on acl condition
1517 JH/05 Permit multiple router/transport headers_add/remove lines.
1519 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1521 JH/07 Avoid using a waiting database for a single-message-only transport.
1522 Performance patch from Paul Fisher. Bugzilla 1262.
1524 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1527 JH/09 Add $headers_added variable, with content from use of ACL modifier
1528 add_header (but not yet added to the message). Bugzilla 199.
1530 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1531 Pulled from Bugzilla 817 by Wolfgang Breyha.
1533 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1535 (nb: this is the same fix as in Exim 4.80.1)
1537 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1540 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1543 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1545 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1546 advertise SMTP AUTH mechanism to us, instead of a generic
1547 protocol violation error. Also, make Exim more robust to bad
1548 data from the Dovecot auth socket.
1550 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1552 When a queue runner is handling a message, Exim first routes the
1553 recipient addresses, during which it prunes them based on the retry
1554 hints database. After that it attempts to deliver the message to
1555 any remaining recipients. It then updates the hints database using
1558 So if a recipient address works intermittently, it can get repeatedly
1559 deferred at routing time. The retry hints record remains fresh so the
1560 address never reaches the final cutoff time.
1562 This is a fairly common occurrence when a user is bumping up against
1563 their storage quota. Exim had some logic in its local delivery code
1564 to deal with this. However it did not apply to per-recipient defers
1565 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1567 This change adds a proper retry rule check during routing so that the
1568 final cutoff time is checked against the message's age. We only do
1569 this check if there is an address retry record and there is not a
1570 domain retry record; this implies that previous attempts to handle
1571 the address had the retry_use_local_parts option turned on. We use
1572 this as an approximation for the destination being like a local
1573 delivery, as in LMTP.
1575 I suspect this new check makes the old local delivery cutoff check
1576 redundant, but I have not verified this so I left the code in place.
1578 TF/02 Correct gecos expansion when From: is a prefix of the username.
1580 Test 0254 submits a message to Exim with the header
1584 When I ran the test suite under the user fanf2, Exim expanded
1585 the header to contain my full name, whereas it should have added
1586 a Resent-Sender: header. It erroneously treats any prefix of the
1587 username as equal to the username.
1589 This change corrects that bug.
1591 GF/01 DCC debug and logging tidyup
1592 Error conditions log to paniclog rather than rejectlog.
1593 Debug lines prefixed by "DCC: " to remove any ambiguity.
1595 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1597 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1598 Bug spotted by Jeremy Harris; was flawed since initial commit.
1599 Would have resulted in OCSP responses post-SNI triggering an Exim
1600 NULL dereference and crash.
1602 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1604 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1605 Bug detection, analysis and fix by Samuel Thibault.
1606 Bugzilla 1331, Debian bug #698092.
1608 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1610 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1611 Server implementation by Todd Lyons, client by JH.
1612 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1613 config variable "prdr_enable" controls whether the server
1614 advertises the facility. If the client requests PRDR a new
1615 acl_data_smtp_prdr ACL is called once for each recipient, after
1616 the body content is received and before the acl_smtp_data ACL.
1617 The client is controlled by both of: a hosts_try_prdr option
1618 on the smtp transport, and the server advertisement.
1619 Default client logging of deliveries and rejections involving
1620 PRDR are flagged with the string "PRDR".
1622 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1623 fclose(). Diagnosis by Todd Lyons.
1625 PP/17 Update configure.default to handle IPv6 localhost better.
1626 Patch by Alain Williams (plus minor tweaks).
1629 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1630 This is now consistent with GnuTLS, and is now documented: the
1631 previous undocumented portable approach to treating the option as
1632 unset was to force an expansion failure. That still works, and
1633 an empty string is now equivalent.
1635 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1636 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1637 not performing validation itself.
1639 PP/20 Added force_command boolean option to pipe transport.
1640 Patch from Nick Koston, of cPanel Inc.
1642 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1645 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1647 PP/21 Fix eximon continuous updating with timestamped log-files.
1648 Broken in a format-string cleanup in 4.80, missed when I repaired the
1649 other false fix of the same issue.
1650 Report and fix from Heiko Schlichting.
1653 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1654 Report from Prashanth Katuri.
1656 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1657 It's SecureTransport, so affects any MacOS clients which use the
1658 system-integrated TLS libraries, including email clients.
1660 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1661 using a MIME ACL for non-SMTP local injection.
1662 Report and assistance in diagnosis by Warren Baker.
1664 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1666 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1668 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1669 last id that failed so it may be referenced in subsequent ACL's.
1671 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1674 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1675 ldap library initialization, allowing self-signed CA's to be
1676 used. Also properly sets require_cert option later in code by
1677 using NULL (global ldap config) instead of ldap handle (per
1678 session). Bug diagnosis and testing by alxgomz.
1680 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1681 the src/util/ subdirectory.
1683 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1684 renamed to Transport Post Delivery Action by Jeremy Harris, as
1687 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1688 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1689 redis_servers = needs to be configured which will be used by the redis
1690 lookup. Patch from Warren Baker, of The Packet Hub.
1692 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1694 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1695 hostname or reverse DNS when processing a host list. Used suggestions
1696 from multiple comments on this bug.
1698 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1700 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1701 Missed a few lines, added it to make the runtest require no keyboard
1704 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1705 contains upper case chars. Make router use caseful_local_part.
1707 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1708 support when GnuTLS has been built with p11-kit.
1714 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1716 This, or similar/improved, will also be change PP/11 of 4.82.
1722 PP/01 Handle short writes when writing local log-files.
1723 In practice, only affects FreeBSD (8 onwards).
1724 Bugzilla 1053, with thanks to Dmitry Isaikin.
1726 NM/01 Bugzilla 949 - Documentation tweak
1728 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1731 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1733 PP/02 Implemented gsasl authenticator.
1735 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1737 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1738 `pkg-config foo` for cflags/libs.
1740 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1741 with rest of GSASL and with heimdal_gssapi.
1743 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1744 `pkg-config foo` for cflags/libs for the TLS implementation.
1746 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1747 properties get this fed in as external SSF. A number of robustness
1748 and debugging improvements to the cyrus_sasl authenticator.
1750 PP/08 cyrus_sasl server now expands the server_realm option.
1752 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1753 Patch by Jeremy Harris.
1755 PP/10 Added dbmjz lookup type.
1757 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1759 PP/12 MAIL args handles TAB as well as SP, for better interop with
1760 non-compliant senders.
1761 Analysis and variant patch by Todd Lyons.
1763 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1764 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1765 Patch from Dirk Mueller <dmueller@suse.com>
1767 PP/13 tls_peerdn now print-escaped for spool files.
1768 Observed some $tls_peerdn in wild which contained \n, which resulted
1769 in spool file corruption.
1771 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1772 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1773 or write after TLS renegotiation, which otherwise led to messages
1776 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1777 as a tracking header (ie: a signed header comes before the signature).
1778 Patch from Wolfgang Breyha.
1780 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1781 comma-sep list; embedded commas doubled.
1783 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1785 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1787 Report and patch from Dmitry Banschikov.
1789 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1790 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1791 failures. We appear to now support TLS1.1+ with Exim.
1793 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1794 lets Exim select keys and certificates based upon TLS SNI from client.
1795 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1796 before an outbound SMTP session. New log_selector, +tls_sni.
1798 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1799 NULL dereference. Report and patch from Alun Jones.
1801 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1802 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1803 Not seeing resolver debug output on NetBSD, but suspect this is a
1804 resolver implementation change.
1806 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1807 Left warnings. Added "eximon gdb" invocation mode.
1809 PP/21 Defaulting "accept_8bitmime" to true, not false.
1811 PP/22 Added -bw for inetd wait mode support.
1813 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1814 locate the relevant includes and libraries. Made this the default.
1816 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1817 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1819 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1820 This may cause build issues on older platforms.
1822 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1823 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1824 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1825 Added SNI support via GnuTLS too.
1826 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1828 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1830 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1831 Applied second patch from Janne, implementing suggestion to default
1832 multiple-strings-in-record handling to match SPF spec.
1834 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1836 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1837 read-only, out of scope).
1838 Patch from Wolfgang Breyha, report from Stuart Northfield.
1840 PP/29 Fix three issues highlighted by clang analyser static analysis.
1841 Only crash-plausible issue would require the Cambridge-specific
1842 iplookup router and a misconfiguration.
1843 Report from Marcin Mirosław.
1845 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1847 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1848 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1849 As part of this, removing so much warning spew let me fix some minor
1850 real issues in debug logging.
1852 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1853 assignment on my part. Fixed.
1855 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1856 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1857 Janne Snabb (who went above and beyond: thank you).
1859 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1860 string otherwise requires a connection and a bunch more work and it's
1861 relatively easy to get wrong. Should also expose TLS library linkage
1864 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1865 64-bit ${eval} (JH/03).
1867 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1868 GNU libc to support some of the 64-bit stuff, should not lead to
1869 conflicts. Defined before os.h is pulled in, so if a given platform
1870 needs to override this, it can.
1872 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1873 protection layer was required, which is not implemented.
1874 Bugzilla 1254, patch from Wolfgang Breyha.
1876 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1877 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1878 tls_dhparam take prime identifiers. Also unbreak combination of
1879 OpenSSL+DH_params+TLSSNI.
1881 PP/39 Disable SSLv2 by default in OpenSSL support.
1887 PP/01 Solaris build fix for Oracle's LDAP libraries.
1888 Bugzilla 1109, patch from Stephen Usher.
1890 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1892 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1895 TF/02 Fix a couple more cases where we did not log the error message
1896 when unlink() failed. See also change 4.74-TF/03.
1898 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1899 lock up or crash if it happened to be inside a call to libc when it
1900 got a SIGUSR1 from exiwhat.
1902 The SIGUSR1 handler appends the current process status to the process
1903 log which is later printed by exiwhat. It used to use the general
1904 purpose logging code to do this, but several functions it calls are
1905 not safe for signals.
1907 The new output code in the SIGUSR1 handler is specific to the process
1908 log, and simple enough that it's easy to inspect for signal safety.
1909 Removing some special cases also simplifies the general logging code.
1910 Removing the spurious timestamps from the process log simplifies
1913 TF/04 Improved ratelimit ACL condition.
1915 The /noupdate option has been deprecated in favour of /readonly which
1916 has clearer semantics. The /leaky, /strict, and /readonly update modes
1917 are mutually exclusive. The update mode is no longer included in the
1918 database key; it just determines when the database is updated. (This
1919 means that when you upgrade Exim will forget old rate measurements.)
1921 Exim now checks that the per_* options are used with an update mode that
1922 makes sense for the current ACL. For example, when Exim is processing a
1923 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1924 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1925 must specify per_mail/readonly. If you omit the update mode it defaults to
1926 /leaky where that makes sense (as before) or /readonly where required.
1928 The /noupdate option is now undocumented but still supported for
1929 backwards compatibility. It is equivalent to /readonly except that in
1930 ACLs where /readonly is required you may specify /leaky/noupdate or
1931 /strict/noupdate which are treated the same as /readonly.
1933 A useful new feature is the /count= option. This is a generalization
1934 of the per_byte option, so that you can measure the throughput of other
1935 aggregate values. For example, the per_byte option is now equivalent
1936 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1938 The per_rcpt option has been generalized using the /count= mechanism
1939 (though it's more complicated than the per_byte equivalence). When it is
1940 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1941 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1942 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1943 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1944 Note that using per_rcpt with a non-readonly update mode in more than
1945 one ACL will cause the recipients to be double-counted. (The per_mail
1946 and per_byte options don't have this problem.)
1948 The handling of very low rates has changed slightly. If the computed rate
1949 is less than the event's count (usually one) then this event is the first
1950 after a long gap. In this case the rate is set to the same as this event's
1951 count, so that the first message of a spam run is counted properly.
1953 The major new feature is a mechanism for counting the rate of unique
1954 events. The new per_addr option counts the number of different
1955 recipients that someone has sent messages to in the last time period. It
1956 behaves like per_rcpt if all the recipient addresses are different, but
1957 duplicate recipient addresses do not increase the measured rate. Like
1958 the /count= option this is a general mechanism, so the per_addr option
1959 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1960 example, measure the rate that a client uses different sender addresses
1961 with the options per_mail/unique=$sender_address. There are further
1962 details in the main documentation.
1964 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1966 TF/06 Removed a few PCRE remnants.
1968 TF/07 Automatically extract Exim's version number from tags in the git
1969 repository when doing development or release builds.
1971 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1972 Bugzilla 879. Patch from Paul Fisher.
1974 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1975 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1978 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1980 PP/05 Variable $av_failed, true if the AV scanner deferred.
1981 Bugzilla 1078. Patch from John Horne.
1983 PP/06 Stop make process more reliably on build failure.
1984 Bugzilla 1087. Patch from Heiko Schlittermann.
1986 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1987 Bugzilla 1089. Patch from Heiko Schlittermann.
1989 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1990 Bugzilla 1131. Patch from Holger Weiß.
1992 PP/09 Handle IPv6 addresses with SPF.
1993 Bugzilla 860. Patch from Wolfgang Breyha.
1995 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1997 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2000 PP/11 match_* no longer expand right-hand-side by default.
2001 New compile-time build option, EXPAND_LISTMATCH_RHS.
2002 New expansion conditions, "inlist", "inlisti".
2004 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2006 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2008 PP/14 fix log_write() format string regression from TF/03.
2009 Bugzilla 1152. Patch from Dmitry Isaikin.
2015 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2017 PP/02 Harmonised TLS library version reporting; only show if debugging.
2018 Layout now matches that introduced for other libraries in 4.74 PP/03.
2020 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2022 PP/04 New "dns_use_edns0" global option.
2024 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2027 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2028 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2030 TK/01 Updated PolarSSL code to 0.14.2.
2031 Bugzilla 1097. Patch from Andreas Metzler.
2033 PP/07 Catch divide-by-zero in ${eval:...}.
2034 Fixes bugzilla 1102.
2036 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2039 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2040 format-string attack -- SECURITY: remote arbitrary code execution.
2042 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2043 time unintentionally subject to list matching rules, letting the header
2044 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2045 arbitrary string expansion). This allowed for information disclosure.
2047 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2048 INT_MIN/-1 -- value coerced to INT_MAX.
2054 NM/01 Workaround for PCRE version dependency in version reporting
2057 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2058 This fixes portability to compilers other than gcc, notably
2059 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2061 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2062 makefiles for portability to HP-UX and POSIX correctness.
2064 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2065 Also via indented variable definition in the Makefile.
2066 (Debugging by Oliver Heesakkers).
2068 PP/02 Restore caching of spamd results with expanded spamd_address.
2069 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2071 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2072 Improves build reliability. Fix from: Frank Elsner
2074 NM/02 Fix wide character breakage in the rfc2047 coding
2075 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2077 NM/03 Allow underscore in dnslist lookups
2078 Fixes bug 1026. Patch from Graeme Fowler
2080 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2081 Code patches from Adam Ciarcinski of NetBSD.
2083 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2086 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2087 is logged, to avoid truncation. Patch from John Horne.
2089 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2090 Patch from Jakob Hirsch.
2092 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2093 SQL string expansion failure details.
2094 Patch from Andrey Oktyabrski.
2096 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2097 Patch from Simon Arlott.
2099 PP/09 New lookups functionality failed to compile on old gcc which rejects
2100 extern declarations in function scope.
2101 Patch from Oliver Fleischmann
2103 PP/10 Use sig_atomic_t for flags set from signal handlers.
2104 Check getgroups() return and improve debugging.
2105 Fixed developed for diagnosis in bug 927 (which turned out to be
2108 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2109 Patch from Mark Zealey.
2111 PP/12 Bugzilla 1056: Improved spamd server selection.
2112 Patch from Mark Zealey.
2114 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2115 Based on patch from Heiko Schlittermann.
2117 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2118 Patch from Uwe Doering, sign-off by Michael Haardt.
2120 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2121 variable declaration deep within a block. Bug and patch from
2124 PP/15 lookups-Makefile IRIX compatibility coercion.
2126 PP/16 Make DISABLE_DKIM build knob functional.
2128 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2129 Patch by Simon Arlott
2131 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2132 variable argument macros. Our copy now differs from upstream.
2138 TF/01 Failure to get a lock on a hints database can have serious
2139 consequences so log it to the panic log.
2141 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2142 controlled using the smtp_confirmation log selector.
2144 TF/03 Include the error message when we fail to unlink a spool file.
2146 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2147 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2148 for maintaining out-of-tree patches for some time.
2150 PP/01 Bugzilla 139: Documentation and portability issues.
2151 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2152 Handle per-OS dynamic-module compilation flags.
2154 PP/02 Let /dev/null have normal permissions.
2155 The 4.73 fixes were a little too stringent and complained about the
2156 permissions on /dev/null. Exempt it from some checks.
2157 Reported by Andreas M. Kirchwitz.
2159 PP/03 Report version information for many libraries, including
2160 Exim version information for dynamically loaded libraries. Created
2161 version.h, now support a version extension string for distributors
2162 who patch heavily. Dynamic module ABI change.
2164 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2165 privilege escalation vulnerability whereby the Exim run-time user
2166 can cause root to append content of the attacker's choosing to
2169 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2172 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2173 If dropping privileges for untrusted macros, we disabled normal logging
2174 on the basis that it would fail; for the Exim run-time user, this is not
2175 the case, and it resulted in successful deliveries going unlogged.
2176 Fixed. Reported by Andreas Metzler.
2182 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2183 only prepend for the Resent-* case. Fixes regression introduced in
2184 Exim 4.70 by NM/22 for Bugzilla 607.
2186 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2187 increasing numbers of administrators be bitten by this.
2189 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2191 PP/03 Bugzilla 994: added openssl_options main configuration option.
2193 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2195 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2197 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2199 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2200 without a peer certificate, leading to a segfault because of an
2201 assumption that peers always have certificates. Be a little more
2202 paranoid. Problem reported by Martin Tscholak.
2204 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2205 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2206 NB: ClamAV planning to remove STREAM in "middle of 2010".
2207 CL also introduces -bmalware, various -d+acl logging additions and
2208 more caution in buffer sizes.
2210 PP/09 Implemented reverse_ip expansion operator.
2212 PP/10 Bugzilla 937: provide a "debug" ACL control.
2214 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2216 PP/12 Bugzilla 973: Implement --version.
2218 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2220 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2222 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2224 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2225 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2226 ignore trailing whitespace.
2228 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2230 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2233 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2234 Notification from Dr Andrew Aitchison.
2236 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2237 ExtendedDetectionInfo response format.
2238 Notification from John Horne.
2240 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2243 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2244 XSL and documented dependency on system catalogs, with examples of how
2247 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2250 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2251 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2252 configuration file which is writeable by the Exim user or group.
2254 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2255 of configuration files to cover files specified with the -C option if
2256 they are going to be used with root privileges, not just the default
2259 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2260 option (effectively making it always true).
2262 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2263 files to be used while preserving root privileges.
2265 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2266 that rogue child processes cannot use them.
2268 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2269 run-time user, instead of root.
2271 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2272 Exim run-time user without dropping privileges.
2274 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2275 result string, instead of calling string_vformat() twice with the same
2278 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2279 for other users. Others should always drop root privileges if they use
2280 -C on the command line, even for a whitelisted configure file.
2282 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2284 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2290 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2291 $data_path, and $header_path variables; fixed documentation bugs and
2294 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2295 exipick to access non-standard spools, including the "frozen" queue
2298 NM/01 Bugzilla 965: Support mysql stored procedures.
2299 Patch from Alain Williams
2301 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2303 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2304 Patch from Andreas Metzler
2306 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2307 Patch from Kirill Miazine
2309 NM/05 Bugzilla 671: Added umask to procmail example.
2311 JJ/03 installed exipick 20100323.0, fixing doc bug
2313 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2314 directory. Notification and patch from Dan Rosenberg.
2316 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2318 TK/02 Improve log output when DKIM signing operation fails.
2320 MH/01 Treat the transport option dkim_domain as a colon separated
2321 list, not as a single string, and sign the message with each element,
2322 omitting multiple occurences of the same signer.
2324 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2325 Bugzilla 985, 986. Patch by Simon Arlott
2327 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2328 Patch by Simon Arlott
2330 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2331 MBX locking. Notification from Dan Rosenberg.
2337 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2339 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2341 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2343 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2345 NM/04 Bugzilla 915: Flag broken perl installation during build.
2351 TK/01 Added patch by Johannes Berg that expands the main option
2352 "spamd_address" if it starts with a dollar sign.
2354 TK/02 Write list of recipients to X-Envelope-Sender header when building
2355 the mbox-format spool file for content scanning (suggested by Jakob
2358 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2359 (http://www.dcc-servers.net/) support via dccifd. Activated by
2360 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2362 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2363 by Mark Daniel Reidel <mr@df.eu>.
2365 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2366 When building exim an external PCRE library is now needed -
2367 PCRE is a system library on the majority of modern systems.
2368 See entry on PCRE_LIBS in EDITME file.
2370 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2371 conversation. Added nologin parameter to request.
2372 Patch contributed by Kirill Miazine.
2374 TF/01 Do not log submission mode rewrites if they do not change the address.
2376 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2378 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2379 log files in place. Contributed by Roberto Lima.
2381 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2383 TF/03 Bugzilla 615: When checking the local_parts router precondition
2384 after a local_part_suffix or local_part_prefix option, Exim now
2385 does not use the address's named list lookup cache, since this
2386 contains cached lookups for the whole local part.
2388 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2389 Robert Millan. Documentation is in experimental-spec.txt.
2391 TF/04 Bugzilla 668: Fix parallel build (make -j).
2393 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2395 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2396 Patch provided by Jan Srzednicki.
2398 TF/05 Leading white space used to be stripped from $spam_report which
2399 wrecked the formatting. Now it is preserved.
2401 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2402 that they are available at delivery time.
2404 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2406 TF/08 TLS error reporting now respects the incoming_interface and
2407 incoming_port log selectors.
2409 TF/09 Produce a more useful error message if an SMTP transport's hosts
2410 setting expands to an empty string.
2412 NM/06 Bugzilla 744: EXPN did not work under TLS.
2413 Patch provided by Phil Pennock.
2415 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2416 Patch provided by Richard Godbee.
2418 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2419 acl_smtp_notquit, added index entry.
2421 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2422 Patch provided by Eugene Bujak.
2424 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2425 accept(). Patch provided by Maxim Dounin.
2427 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2428 Patch provided by Phil Pennock.
2430 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2432 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2433 Patch provided by Brad "anomie" Jorsch.
2435 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2436 Patch provided by Dean Brooks.
2438 TK/05 Add native DKIM support (does not depend on external libraries).
2440 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2441 Patch provided by Graeme Fowler.
2443 NM/16 Bugzilla 851: Documentation example syntax fix.
2445 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2447 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2450 NM/19 Bugzilla 745: TLS version reporting.
2451 Patch provided by Phil Pennock.
2453 NM/20 Bugzilla 167: bool: condition support.
2454 Patch provided by Phil Pennock.
2456 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2457 clients. Patch provided by Phil Pennock.
2459 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2460 Patch provided by Brad "anomie" Jorsch.
2462 NM/23 Bugzilla 687: Fix misparses in eximstats.
2463 Patch provided by Heiko Schlittermann.
2465 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2466 Patch provided by Heiko Schlittermann.
2468 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2469 plus update to original patch.
2471 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2473 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2474 Patch provided by David Brownlee.
2476 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2478 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2480 NM/30 Bugzilla 888: TLS documentation bugfixes.
2482 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2484 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2485 Unlike the original bugzilla I have changed all shell scripts in src tree.
2487 NM/33 Bugzilla 898: Transport filter timeout fix.
2488 Patch by Todd Rinaldo.
2490 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2491 Patch by Serge Demonchaux.
2493 NM/35 Bugzilla 39: Base64 decode bug fixes.
2494 Patch by Jakob Hirsch.
2496 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2498 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2500 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2502 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2508 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2509 ALT-N's libdkim that I have put here:
2510 http://duncanthrax.net/exim-experimental/
2512 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2513 were called 'true' and it seems that C99 defines that as a reserved
2514 keyword to be used with 'bool' variable types. That means you could
2515 not include C99-style headers which use bools without triggering
2516 build errors in sieve.c.
2518 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2519 as mailq or other aliases. Changed the --help handling significantly
2520 to do whats expected. exim_usage() emits usage/help information.
2522 SC/01 Added the -bylocaldomain option to eximstats.
2524 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2526 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2528 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2534 PH/01 Another patch from the Sieve maintainer.
2536 PH/02 When an IPv6 address is converted to a string for single-key lookup
2537 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2538 dots are used instead of colons so that keys in lsearch files need not
2539 contain colons. This was done some time before quoting was made available
2540 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2541 (notated using the quote facility) so as to distinguish them from IPv4
2542 keys. This meant that lookups for IP addresses in host lists did not work
2543 for iplsearch lookups.
2545 This has been fixed by arranging for IPv6 addresses to be expressed with
2546 colons if the lookup type is iplsearch. This is not incompatible, because
2547 previously such lookups could never work.
2549 The situation is now rather anomalous, since one *can* have colons in
2550 ordinary lsearch keys. However, making the change in all cases is
2551 incompatible and would probably break a number of configurations.
2553 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2556 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2557 conversion specification without a maximum field width, thereby enabling
2558 a rogue spamd server to cause a buffer overflow. While nobody in their
2559 right mind would setup Exim to query an untrusted spamd server, an
2560 attacker that gains access to a server running spamd could potentially
2561 exploit this vulnerability to run arbitrary code as the Exim user.
2563 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2564 $primary_hostname instead of what libspf2 thinks the hosts name is.
2566 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2567 a directory entry by the name of the lookup key. Previously, if a
2568 symlink pointed to a non-existing file or a file in a directory that
2569 Exim lacked permissions to read, a lookup for a key matching that
2570 symlink would fail. Now it is enough that a matching directory entry
2571 exists, symlink or not. (Bugzilla 503.)
2573 PH/03 The body_linecount and body_zerocount variables are now exported in the
2576 PH/04 Added the $dnslist_matched variable.
2578 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2579 This means they are set thereafter only if the connection becomes
2582 PH/06 Added the client_condition to authenticators so that some can be skipped
2583 by clients under certain conditions.
2585 PH/07 The error message for a badly-placed control=no_multiline_responses left
2586 "_responses" off the end of the name.
2588 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2590 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2591 (without spaces) instead of just copying the configuration text.
2593 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2595 PH/11 Added $max_received_linelength.
2597 PH/12 Added +ignore_defer and +include_defer to host lists.
2599 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2600 way in which PCRE > 7.0 is built.
2602 PH/14 Implemented queue_only_load_latch.
2604 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2605 MAIL command. The effect was to mangle the value on 64-bit systems.
2607 PH/16 Another patch from the Sieve maintainer.
2609 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2611 PH/18 If a system quota error occurred while trying to create the file for
2612 a maildir delivery, the message "Mailbox is full" was not appended to the
2613 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2614 only to a quota excession during the actual writing of the file.
2616 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2617 characters?) which causes problems in log lines. The DN values are now
2618 passed through string_printing() before being added to log lines.
2620 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2621 and InterBase are left for another time.)
2623 PH/21 Added message_body_newlines option.
2625 PH/22 Guard against possible overflow in moan_check_errorcopy().
2627 PH/23 POSIX allows open() to be a macro; guard against that.
2629 PH/24 If the recipient of an error message contained an @ in the local part
2630 (suitably quoted, of course), incorrect values were put in $domain and
2631 $local_part during the evaluation of errors_copy.
2637 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2638 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2641 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2642 issue a MAIL command.
2644 PH/02 In an ACL statement such as
2646 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2648 if a client was not listed at all, or was listed with a value other than
2649 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2650 the condition was not true (as it should be), so access was not denied.
2651 The bug was that the ! inversion was incorrectly passed on to the second
2652 item. This has been fixed.
2654 PH/03 Added additional dnslists conditions == and =& which are different from
2655 = and & when the dns lookup returns more than one IP address.
2657 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2658 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2660 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2661 FSYNC, which compiles an option called disable_fsync that allows for
2662 bypassing fsync(). The documentation is heavily laced with warnings.
2664 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2666 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2667 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2668 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2669 including adding "make clean"; (3) Added -fPIC when compiling the test
2670 dynamically loaded module, to get rid of a warning.
2672 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2673 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2674 = 0s. The bug is otherwise harmless.
2676 PH/07 There was a bug in the dovecot authenticator such that the value of
2677 $auth1 could be overwritten, and so not correctly preserved, after a
2678 successful authentication. This usually meant that the value preserved by
2679 the server_setid option was incorrect.
2681 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2683 PH/09 Installed PCRE release 7.0.
2685 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2686 run for batched SMTP input. It is now run at the start of every message
2687 in the batch. While fixing this I discovered that the process information
2688 (output by running exiwhat) was not always getting set for -bs and -bS
2689 input. This is fixed, and it now also says "batched" for BSMTP.
2691 PH/11 Added control=no_pipelining.
2693 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2694 patch, slightly modified), and move the expansion of helo_data till after
2695 the connection is made in the smtp transport (so it can use these
2698 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2700 PH/14 Added log_selector = +pid.
2702 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2704 PH/16 Add ${if forany and ${if forall.
2706 PH/17 Added dsn_from option to vary the From: line in DSNs.
2708 PH/18 Flush SMTP output before performing a callout, unless control =
2709 no_callout_flush is set.
2711 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2712 was true (the default) a successful delivery failed to delete the retry
2713 item, thus causing premature timeout of the address. The bug is now
2716 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2718 PH/21 Long custom messages for fakedefer and fakereject are now split up
2719 into multiline responses in the same way that messages for "deny" and
2720 other ACL rejections are.
2722 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2723 with slight modification.
2725 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2726 draft, changing the syntax and factoring some duplicate code".
2728 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2729 for deliveries of the second and subsequent messages over the same SMTP
2732 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2733 ${reduce, with only minor "tidies".
2735 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2737 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2738 expansion side effects.
2740 PH/27 When a message times out after an over-quota error from an Exim-imposed
2741 quota, the bounce message says "mailbox is full". This message was not
2742 being given when it was a system quota that was exceeded. It now should
2745 MH/03 Made $recipients available in local_scan(). local_scan() already has
2746 better access to the recipient list through recipients_list[], but
2747 $recipients can be useful in postmaster-provided expansion strings.
2749 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2750 in the case of a MAIL command with additional options following the
2751 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2752 were accidentally chopped off.
2754 PH/29 SMTP synchronization checks are implemented when a command is read -
2755 there is a check that no more input is waiting when there shouldn't be
2756 any. However, for some commands, a delay in an ACL can mean that it is
2757 some time before the response is written. In this time, more input might
2758 arrive, invalidly. So now there are extra checks after an ACL has run for
2759 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2760 pipelining has not been advertised.
2762 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2764 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2765 returned in the SMTP response when smtp_return_error_details was false.
2766 This has been fixed.
2768 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2769 instead of the C I/O that was originally supplied, because problems were
2770 reported on Solaris.
2772 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2773 Exim which did not show up earlier: it was assuming that a call to
2774 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2775 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2776 was a macro that became an assignment, so it seemed to work. This has
2777 changed to a proper function call with a void return, hence the compile
2778 error. Exim's code has been fixed.
2780 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2783 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2785 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2787 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2788 because it turns out to be too big or there is a timeout) there is no
2789 "Completed" line in the log. When some messages of this type were
2790 selected by exigrep, they were listed as "not completed". Others were
2791 picked up by some special patterns. I have improved the selection
2792 criteria to be more general.
2794 PH/38 The host_find_failed option in the manualroute router can now be set
2795 to "ignore", to completely ignore a host whose IP address cannot be
2796 found. If all hosts are ignored, the behaviour is controlled by the new
2797 host_all_ignored option.
2799 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2800 homing or because of multiple MX records with /mx) generated more than
2801 one IP address, and the following item turned out to be the local host,
2802 all the secondary addresses of the first item were incorrectly removed
2803 from the list, along with the local host and any following hosts (which
2804 is what is supposed to happen).
2806 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2807 whoever called Exim into the -H file. In the case of the daemon it was
2808 behaving confusingly. When first started, it used values for whoever
2809 started the daemon, but after a SIGHUP it used the Exim user (because it
2810 calls itself on a restart). I have changed the code so that it now always
2813 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2814 message are rejected with the same error (e.g. no authentication or bad
2815 sender address), and a DATA command is nevertheless sent (as can happen
2816 with PIPELINING or a stupid MUA), the error message that was given to the
2817 RCPT commands is included in the rejection of the DATA command. This is
2818 intended to be helpful for MUAs that show only the final error to their
2821 PH/42 Another patch from the Sieve maintainer.
2823 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2824 Eximstats - Fixed some broken HTML links and added missing column headers
2826 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2827 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2829 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2831 PH/43 Yet another patch from the Sieve maintainer.
2833 PH/44 I found a way to check for a TCP/IP connection going away before sending
2834 the response to the final '.' that terminates a message, but only in the
2835 case where the client has not sent further data following the '.'
2836 (unfortunately, this is allowed). However, in many cases there won't be
2837 any further data because there won't be any more messages to send. A call
2838 to select() can be used: if it shows that the input is "ready", there is
2839 either input waiting, or the socket has been closed. An attempt to read
2840 the next input character can distinguish the two cases. Previously, Exim
2841 would have sent an OK response which the client would never have see.
2842 This could lead to message repetition. This fix should cure that, at
2843 least in a lot of common cases.
2845 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2846 advertised in response to EHLO.
2852 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2853 fixed by 4.65/MH/01 (is this a record?) are fixed:
2855 (i) An empty string was always treated as zero by the numeric comparison
2856 operators. This behaviour has been restored.
2858 (ii) It is documented that the numeric comparison operators always treat
2859 their arguments as decimal numbers. This was broken in that numbers
2860 starting with 0 were being interpreted as octal.
2862 While fixing these problems I realized that there was another issue that
2863 hadn't been noticed. Values of message_size_limit (both the global option
2864 and the transport option) were treated as octal if they started with 0.
2865 The documentation was vague. These values are now always treated as
2866 decimal, and I will make that clear in the documentation.
2872 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2873 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2876 MH/01 Don't check that the operands of numeric comparison operators are
2877 integers when their expansion is in "skipping" mode (fixes bug
2878 introduced by 4.64-PH/07).
2880 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2881 child addresses, Exim now panics and dies. Previously, because the count
2882 is held in a short int, deliveries were likely to be lost. As such a
2883 large number of recipients for a single message is ridiculous
2884 (performance will be very, very poor), I have chosen to impose a limit
2885 rather than extend the field.
2891 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2892 leftover -K file (the existence of which was triggered by #402).
2893 While we were at it, introduced process PID as part of the -K
2894 filename. This should rule out race conditions when creating
2897 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2898 processing considerably. Previous code took too long for large mails,
2899 triggering a timeout which in turn triggers #401.
2901 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2902 in the DK code in transports.c. sendfile() is not really portable,
2903 hence the _LINUX specificness.
2905 TF/01 In the add_headers option to the mail command in an Exim filter,
2906 there was a bug that Exim would claim a syntax error in any
2907 header after the first one which had an odd number of characters
2910 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2911 callout verification, Exim cached a "reject" for the entire domain. This
2912 is correct for most verifications, but it is not correct for a recipient
2913 verification with use_sender or use_postmaster set, because in that case
2914 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2915 case of MAIL FROM:<> rejection from other early rejections (e.g.
2916 rejection of HELO). When verifying a recipient using a non-null MAIL
2917 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2918 Whatever the result of the callout, the value of the domain cache is
2919 left unchanged (for any other kind of callout, getting as far as trying
2920 RCPT means that the domain itself is ok).
2922 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2925 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2926 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2927 session, the daemon ignores ECONNECT errors and logs others; it now
2928 ignores EPIPE as well.
2930 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2931 (quoted-printable decoding).
2933 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2934 later the small subsequent patch to fix an introduced bug.
2936 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2938 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2940 PH/08 An error is now given if message_size_limit is specified negative.
2942 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2943 to be given (somewhat) arbitrary names.
2945 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2948 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2949 miscellaneous code fixes
2951 PH/10 Added the log_reject_target ACL modifier to specify where to log
2954 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2955 hostname. This is wrong, because it relates to the incoming message (and
2956 probably the interface on which it is arriving) and not to the outgoing
2957 callout (which could be using a different interface). This has been
2958 changed to use the value of the helo_data option from the smtp transport
2959 instead - this is what is used when a message is actually being sent. If
2960 there is no remote transport (possible with a router that sets up host
2961 addresses), $smtp_active_hostname is used.
2963 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2964 tweaks were necessary in order to get it to work (see also 21 below):
2965 (a) The code assumed that strncpy() returns a negative number on buffer
2966 overflow, which isn't the case. Replaced with Exim's string_format()
2968 (b) There were several signed/unsigned issues. I just did the minimum
2969 hacking in of casts. There is scope for a larger refactoring.
2970 (c) The code used strcasecmp() which is not a standard C function.
2971 Replaced with Exim's strcmpic() function.
2972 (d) The code set only $1; it now sets $auth1 as well.
2973 (e) A simple test gave the error "authentication client didn't specify
2974 service in request". It would seem that Dovecot has changed its
2975 interface. Fortunately there's a specification; I followed it and
2976 changed what the client sends and it appears to be working now.
2978 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2981 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2982 address A is aliased to B and C, where B exists and C does not. Without
2983 -v the output is "A verified" because verification stops after a
2984 successful redirection if more than one address is generated. However,
2985 with -v the child addresses are also verified. Exim was outputting "A
2986 failed to verify" and then showing the successful verification for C,
2987 with its parentage. It now outputs "B failed to verify", showing B's
2988 parentage before showing the successful verification of C.
2990 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2991 look up a TXT record in a specific list after matching in a combined
2994 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2995 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2996 they consult the DNS. I had assumed they would set it the way they
2997 wanted; and indeed my experiments on Linux seem to show that in some
2998 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2999 To be on the safe side, however, I have now made the interface to
3000 host_find_byname() similar to host_find_bydns(), with an argument
3001 containing the DNS resolver options. The host_find_byname() function now
3002 sets these options at its start, just as host_find_bydns() does. The smtp
3003 transport options dns_qualify_single and dns_search_parents are passed to
3004 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3005 of host_find_byname() use the default settings of RES_DEFNAMES
3006 (qualify_single) but not RES_DNSRCH (search_parents).
3008 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3009 spool_read_header() do less string testing, by means of a preliminary
3010 switch on the second character of optional "-foo" lines. (This is
3011 overdue, caused by the large number of possibilities that now exist.
3012 Originally there were few.) While I was there, I also converted the
3013 str(n)cmp tests so they don't re-test the leading "-" and the first
3014 character, in the hope this might squeeze out yet more improvement.
3016 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3017 flag allowing group syntax was set by the header_syntax check but not
3018 turned off, possible causing trouble later; (2) The flag was not being
3019 set at all for the header_verify test, causing "group"-style headers to
3020 be rejected. I have now set it in this case, and also caused header_
3021 verify to ignore an empty address taken from a group. While doing this, I
3022 came across some other cases where the code for allowing group syntax
3023 while scanning a header line wasn't quite right (mostly, not resetting
3024 the flag correctly in the right place). These bugs could have caused
3025 trouble for malformed header lines. I hope it is now all correct.
3027 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3028 with the "reply" argument non-NULL. The code, however (which originally
3029 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3030 but it didn't always do it. This confused somebody who was copying the
3031 code for some other use. I have removed all the tests.
3033 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3034 feature that was used to support insecure browsers during the U.S. crypto
3035 embargo. It requires special client support, and Exim is probably the
3036 only MTA that supported it -- and would never use it because real RSA is
3037 always available. This code has been removed, because it had the bad
3038 effect of slowing Exim down by computing (never used) parameters for the
3039 RSA_EXPORT functionality.
3041 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3042 authenticator to fail if there's a tab character in the incoming data
3043 (there should never be unless someone is messing about, as it's supposed
3044 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3045 if the connection is using TLS or if the remote IP is the same as the
3046 local IP, and the "valid-client-cert option" if a client certificate has
3049 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3050 authenticators. This can be used for authorization after authentication
3051 succeeds. (In the case of plaintext, it servers for both authentication
3054 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3055 if any retry times were supplied.
3057 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3058 connection, where there is no client IP address to check. In this
3059 situation, the verify now always succeeds.
3061 PH/25 Applied John Jetmore's -Mset patch.
3063 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3065 PH/27 In a string expansion for a processed (not raw) header when multiple
3066 headers of the same name were present, leading whitespace was being
3067 removed from all of them, but trailing whitespace was being removed only
3068 from the last one. Now trailing whitespace is removed from each header
3069 before concatenation. Completely empty headers in a concatenation (as
3070 before) are ignored.
3072 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3073 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3075 PH/29 [Removed. This was a change that I later backed out, and forgot to
3076 correct the ChangeLog entry (that I had efficiently created) before
3077 committing the later change.]
3079 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3080 address errors (4xx response to RCPT) over the same connection as other
3081 messages routed to the same hosts. Such deliveries are always "forced",
3082 so retry times are not inspected. This resulted in far too many retries
3083 for the affected addresses. The effect occurred only when there were more
3084 hosts than the hosts_max_try setting in the smtp transport when it had
3085 the 4xx errors. Those hosts that it had tried were not added to the list
3086 of hosts for which the message was waiting, so if all were tried, there
3087 was no problem. Two fixes have been applied:
3089 (i) If there are any address or message errors in an SMTP delivery, none
3090 of the hosts (tried or untried) are now added to the list of hosts
3091 for which the message is waiting, so the message should not be a
3092 candidate for sending over the same connection that was used for a
3093 successful delivery of some other message. This seems entirely
3094 reasonable: after all the message is NOT "waiting for some host".
3095 This is so "obvious" that I'm not sure why it wasn't done
3096 previously. Hope I haven't missed anything, but it can't do any
3097 harm, as the worst effect is to miss an optimization.
3099 (ii) If, despite (i), such a delivery is accidentally attempted, the
3100 routing retry time is respected, so at least it doesn't keep
3101 hammering the server.
3103 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3104 in ${readsocket because some servers need this prod.
3106 PH/32 Added some extra debug output when updating a wait-xxx database.
3108 PH/33 The hint "could be header name not terminated by colon", which has been
3109 given for certain expansion errors for a long time, was not being given
3110 for the ${if def:h_colon_omitted{... case.
3112 PH/34 The spec says: "With one important exception, whenever a domain list is
3113 being scanned, $domain contains the subject domain." There was at least
3114 one case where this was not true.
3116 PH/35 The error "getsockname() failed: connection reset by peer" was being
3117 written to the panic log as well as the main log, but it isn't really
3118 panic-worthy as it just means the connection died rather early on. I have
3119 removed the panic log writing for the ECONNRESET error when getsockname()
3122 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3123 runs only) independently of the message's sender address. This meant
3124 that, if the 4xx error was in fact related to the sender, a different
3125 message to the same recipient with a different sender could confuse
3126 things. In particular, this can happen when sending to a greylisting
3127 server, but other circumstances could also provoke similar problems.
3128 I have changed the default so that the retry time for these errors is now
3129 based a combination of the sender and recipient addresses. This change
3130 can be overridden by setting address_retry_include_sender=false in the
3133 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3134 remote server are returned as part of bounce messages. This was not
3135 happening for LMTP over a pipe (the lmtp transport), but now it is the
3136 same for both kinds of LMTP.
3138 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3139 in header lines that were in fact CNAMEs. This is no longer the case.
3141 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3142 and queue runs started by the daemon processed all messages. This has
3143 been fixed so that -R and -S can now usefully be given with -q<time>.
3145 PH/40 Import PCRE release 6.7 (fixes some bugs).
3147 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3149 PH/42 Give an error if -q is specified more than once.
3151 PH/43 Renamed the variables $interface_address and $interface_port as
3152 $received_ip_address and $received_port, to make it clear that these
3153 values apply to message reception, and not to the outgoing interface when
3154 a message is delivered. (The old names remain recognized, of course.)
3156 PH/44 There was no timeout on the connect() call when using a Unix domain
3157 socket in the ${readsocket expansion. There now is.
3159 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3160 be meaningful with "accept".
3162 SC/01 Eximstats V1.43
3163 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3165 SC/02 Eximstats V1.44
3166 Use a glob alias rather than an array ref in the generated
3167 parser. This improves both readability and performance.
3169 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3170 Collect SpamAssassin and rejection statistics.
3171 Don't display local sender or destination tables unless
3172 there is data to show.
3173 Added average volumes into the top table text output.
3175 SC/04 Eximstats V1.46
3176 Collect data on the number of addresses (recipients)
3177 as well as the number of messages.
3179 SC/05 Eximstats V1.47
3180 Added 'Message too big' to the list of mail rejection
3181 reasons (thanks to Marco Gaiarin).
3183 SC/06 Eximstats V1.48
3184 Mainlog lines which have GMT offsets and are too short to
3185 have a flag are now skipped.
3187 SC/07 Eximstats V1.49 (Alain Williams)
3188 Added the -emptyok flag.
3190 SC/08 Eximstats V1.50
3191 Fixes for obtaining the IP address from reject messages.
3193 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3194 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3195 whitespace changes from 4.64-PH/27
3197 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3200 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3201 are found, allow negative numbers in numeric criteria)
3203 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3205 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3206 to match changes made in 4.64-PH/43
3208 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3210 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3211 "domain" is actually an IP address, and force a failure. This locks out
3212 those revolvers/nameservers that support "A-for-A" lookups, in
3213 contravention of the specifications.
3215 PH/48 When a host name was looked up from an IP address, and the subsequent
3216 forward lookup of the name timed out, the host name was left in
3217 $sender_host_name, contrary to the specification.
3219 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3220 restricted to single-key lookups, Exim was not diagnosing an error if
3221 * or *@ was used with a query-style lookup.
3223 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3225 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3226 long ago, but noone interested enough thought of it. Let's just say that
3227 the "1.1" means that there are some new functions that weren't there at
3228 some point in the past.
3230 PH/51 Error processing for expansion failure of helo_data from an smtp
3231 transport during callout processing was broken.
3233 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3234 tested/used via the -bh/-bhc/-bs options.
3236 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3237 bug, fixed in subsequent PCRE releases).
3239 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3240 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3242 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3248 SC/01 Use a glob alias rather than an array ref in eximstats generated
3249 parser. This improves both readability and performance.
3251 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3252 Don't display local sender or destination tables in eximstats unless
3253 there is data to show.
3254 Added average volumes into the eximstats top table text output.
3256 SC/03 Collect data on the number of addresses (recipients) as well
3257 as the number of messages in eximstats.
3259 TF/01 Correct an error in the documentation for the redirect router. Exim
3260 does (usually) call initgroups() when daemonizing.
3262 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3263 with consistent privilege compared to when running as a daemon.
3265 TF/03 Note in the spec that $authenticated_id is not set for local
3266 submissions from trusted users.
3268 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3269 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3271 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3272 by adding some example configuration directives to the default
3273 configuration file. A little bit of work is required to uncomment the
3274 directives and define how usernames and passwords are checked, but
3275 there is now a framework to start from.
3277 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3278 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3279 without this. I don't know how relevant this is to other LDAP libraries.
3281 PH/02 Add the verb name to the "unknown ACL verb" error.
3283 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3285 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3287 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3288 directory not expanded when it should be if an expanded home directory
3289 was set for the address (which is overridden by the transport).
3291 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3294 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3295 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3296 because it is too late at that time, and has no effect.
3298 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3299 security issue with \' (bugzilla #107). I could not use the
3300 PQescapeStringConn() function, because it needs a PGconn value as one of
3303 PH/08 When testing addresses using -bt, indicate those final addresses that
3304 are duplicates that would not cause an additional delivery. At least one
3305 person was confused, thinking that -bt output corresponded to deliveries.
3306 (Suppressing duplicates isn't a good idea as you lose the information
3307 about possibly different redirections that led to the duplicates.)
3309 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3310 systems where poll() doesn't work, in particular OS X.
3312 PH/10 Added more information to debugging output for retry time not reached.
3314 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3315 operations in malware.c.
3317 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3320 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3321 syslog_duplication set false, log lines that would normally be written
3322 both the the main log and to the reject log were not written to syslog at
3325 PH/14 In the default configuration, change the use of "message" in ACL warn
3326 statements to "add_header".
3328 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3329 not followed by a command (e.g. "seen endif").
3331 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3332 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3335 PH/17 Added extra conditions to the default value of delay_warning_condition
3339 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3340 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3341 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3344 The Auto-Submitted: and various List- headers are standardised, whereas I
3345 don't think Precedence: ever was.
3347 PH/18 Refactored debugging code in route_finduser() to show more information,
3348 in particular, the error code if getpwnam() issues one.
3350 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3351 This is apparently needed in addition to the PH/07 change above to avoid
3352 any possible encoding problems.
3354 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3355 but not after initializing Perl.
3357 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3358 output them only if debugging. By default they are written stderr,
3359 apparently, which is not desirable.
3361 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3364 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3367 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3369 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3370 authenticated or an ident call has been made. Suppress the default
3371 values for $authenticated_id and $authenticated_sender (but permit -oMai
3372 and -oMas) when testing with -bh.
3374 PH/24 Re-jigged the order of the tests in the default configuration so that the
3375 tests for valid domains and recipients precede the DNS black list and CSA
3376 tests, on the grounds that those ones are more expensive.
3378 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3379 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3380 This bug exists in every version of Exim that I still have, right back to
3383 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3384 However, an attempt to turn on case-sensitivity in a regex key by
3385 including (?-i) didn't work because the subject string was already
3386 lowercased, and the effects were non-intuitive. It turns out that a
3387 one-line patch can be used to allow (?-i) to work as expected.
3393 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3394 other effects) broke the use of negated acl sub-conditions.
3396 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3399 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3400 "Deny" causes Exim to reject the incoming connection with a 554 error.
3401 Unfortunately, if there is a major crisis, such as a disk failure,
3402 tcp-wrappers gives "deny", whereas what one would like would be some
3403 kind of temporary error. A kludge has been added to help with this.
3404 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3405 554 error is used if errno is still zero or contains ENOENT (which occurs
3406 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3409 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3411 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3412 errors. Otherwise a message that provokes a temporary error (when other
3413 messages do not) can cause a whole host to time out.
3415 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3416 addresses were routed directly to files or pipes from a redirect router.
3417 File deliveries just didn't batch; pipe deliveries might have suffered
3420 PH/06 A failure to get a lock for a hints database would erroneously always say
3421 "Failed to get write lock", even when it was really a read lock.
3423 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3424 of 0600. This has been changed to use the value of the lockfile_mode
3425 option (which defaults to 0600).
3427 PH/08 Applied small patch from the Sieve maintainer.
3429 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3430 folder from quota calculations, a direct delivery into this folder messed
3431 up the contents of the maildirsize file. This was because the regex was
3432 used only to exclude .Trash (or whatever) when the size of the mailbox
3433 was calculated. There was no check that a delivery was happening into an
3434 excluded directory. This bug has been fixed by ignoring all quota
3435 processing for deliveries into excluded directories.
3437 PH/10 Added the maildirfolder_create_regex option to appendfile.
3443 PH/01 The code for finding all the local interface addresses on a FreeBSD
3444 system running IPv6 was broken. This may well have applied to all BSD
3445 systems, as well as to others that have similar system calls. The broken
3446 code found IPv4 interfaces correctly, but gave incorrect values for the
3447 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3448 that it would not match correctly against @[] and not recognize the IPv6
3451 PH/02 The ipliteral router was not recognizing addresses of the form user@
3452 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3454 PH/03 Added disable_ipv6.
3456 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3457 decoded form, because it is most often used to construct To: headers
3458 lines in autoreplies, and the decoded form may well be syntactically
3459 invalid. However, $reply_address has leading white space removed, and all
3460 newlines turned into spaces so that the autoreply transport does not
3463 PH/05 If group was specified without a user on a router, and no group or user
3464 was specified on a transport, the group from the router was ignored.
3466 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3467 for visible compile-time settings that can be used to change these
3468 numbers, for those that want even more. Backwards compatibility with old
3469 spool files has been maintained. However, going back to a previous Exim
3470 release will lost any variables that are in spool files.
3472 PH/07 Two small changes when running in the test harness: increase delay when
3473 passing a TCP/IP connection to a new process, in case the original
3474 process has to generate a bounce, and remove special handling of
3475 127.0.0.2 (sic), which is no longer necessary.
3477 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3478 be the same on different OS.
3480 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3483 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3484 whether --show-vars was specified or not
3486 JJ/02 exipick: Added support for new ACL variable spool format introduced
3489 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3490 syntactically invalid From: or Reply-to: line, and a filter used this to
3491 generate an autoreply, and therefore failed to obtain an address for the
3492 autoreply, Exim could try to deliver to a non-existent relative file
3493 name, causing unrelated and misleading errors. What now happens is that
3494 it logs this as a hard delivery error, but does not attempt to create a
3497 PH/11 The exinext utility has a -C option for testing purposes, but although
3498 the given file was scanned by exinext itself; it wasn't being passed on
3499 when Exim was called.
3501 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3502 an end-of-file indication when reading a command response.
3504 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3505 compiled. In many other places in Exim, IPv6 addresses are always
3506 recognized, so I have changed this. It also means that IPv4 domain
3507 literals of the form [IPV4:n.n.n.n] are now always recognized.
3509 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3510 used if the router is not running as root, for example, when verifying at
3511 ACL time, or when using -bh. The debugging output from this situation was
3512 non-existent - all you got was a failure to exec. I have made two
3515 (a) Failures to set uid/gid, the current directory, or a process leader
3516 in a subprocess such as that created by queryprogram now generate
3517 suitable debugging output when -d is set.
3519 (b) The queryprogram router detects when it is not running as root,
3520 outputs suitable debugging information if -d is set, and then runs
3521 the subprocess without attempting to change uid/gid.
3523 PH/15 Minor change to Makefile for building test_host (undocumented testing
3526 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3527 additional section of a DNS packet that returns MX or SRV records.
3528 Instead, it always explicitly searches for A/AAAA records. This avoids
3529 major problems that occur when a DNS server includes only records of one
3530 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3531 fixed another bug: if SRV records were looked up and the corresponding
3532 address records were *not* found in the additional section, the port
3533 values from the SRV records were lost.
3535 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3536 using the correct key (the original address) when searching the retry
3537 rules in order to find which one to use for generating the retry hint.
3539 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3540 adding the default one. Similarly, if it contains a Reply-To: header, the
3541 errors_reply_to option, if set, is not used.
3543 PH/19 When calculating a retry time, Exim used to measure the "time since
3544 failure" by looking at the "first failed" field in the retry record. Now
3545 it does not use this if it is later than than the arrival time of the
3546 message. Instead it uses the arrival time. This makes for better
3547 behaviour in cases where some deliveries succeed, thus re-setting the
3548 "first failed" field. An example is a quota failure for a huge message
3549 when small messages continue to be delivered. Without this change, the
3550 "time since failure" will always be short, possible causing more frequent
3551 delivery attempts for the huge message than are intended.
3552 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3554 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3555 $1, $2, $3) because the numerical variables can be reset during some
3556 expansion items (e.g. "match"), thereby losing the authentication data.
3558 PH/21 Make -bV show the size of off_t variables so that the test suite can
3559 decide whether to run tests for quotas > 2G.
3561 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3562 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3563 filecount value is greater than 2G or if a quota value is greater than 2G
3564 on a system where the size of off_t is not greater than 4, a panic error
3567 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3568 never match. The debug and -bh output now contains an explicit error
3569 message indicating a malformed IPv4 address or mask.
3571 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3572 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3573 PH/23 above applies.
3575 PH/25 Do not write to syslog when running in the test harness. The only
3576 occasion when this arises is a failure to open the main or panic logs
3577 (for which there is an explicit test).
3579 PH/26 Added the /no_tell option to "control=freeze".
3581 PH/27 If a host name lookup failed very early in a connection, for example, if
3582 the IP address matched host_lookup and the reverse lookup yielded a name
3583 that did not have a forward lookup, an error message of the form "no IP
3584 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3585 could be logged. Now it outputs the IP address instead of "NULL".
3587 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3588 allows the sender and the authenticated sender to be set when
3589 submitting a message from within Exim. Since child_open_exim() is
3590 documented for local_scan(), the new function should be too.
3592 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3593 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3594 results in an empty string is now treated as unset.
3596 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3598 PH/31 Added sender_verify_fail logging option.
3600 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3601 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3602 tidied the source and removed it altogether.
3604 PH/33 When a queue run was abandoned because the load average was too high, a
3605 log line was always written; now it is written only if the queue_run log
3606 selector is set. In addition, the log line for abandonment now contains
3607 information about the queue run such as the pid. This is always present
3608 in "start" and "stop" lines but was omitted from the "abandon" line.
3610 PH/34 Omit spaces between a header name and the colon in the error message that
3611 is given when verify = headers_syntax fails (if there are lots of them,
3612 the message gets confusing).
3614 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3615 names, as there are now some PTR records that contain slashes. This check
3616 is only to protect against broken name servers that fall over on strange
3617 characters, so the fact that it applies to all lookups doesn't matter.
3619 PH/36 Now that the new test suite is complete, we can remove some of the
3620 special code in Exim that was needed for the old test suite. For example,
3621 sorting DNS records because real resolvers return them in an arbitrary
3622 order. The new test suite's fake resolver always returns records in the
3625 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3626 bounces) except when queue_only is set, to avoid logging races between
3627 the different processes.
3629 PH/38 Panic-die if .include specifies a non-absolute path.
3631 PH/39 A tweak to the "H" retry rule from its user.
3633 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3634 a label. They prevented compilation on older perls.
3636 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3637 a warning to be raised on newish perls.
3639 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3640 on queue. Changes to match documented behaviour of showing count of
3641 messages matching specified criteria.
3643 PH/40 Changed the default ident timeout from 30s to 5s.
3645 PH/41 Added support for the use of login_cap features, on those BSD systems
3646 that have them, for controlling the resources used by pipe deliveries.
3648 PH/42 The content-scanning code uses fopen() to create files in which to put
3649 message data. Previously it was not paying any attention to the mode of
3650 the files. Exim runs with umask(0) because the rest of the code creates
3651 files with open(), and sets the required mode explicitly. Thus, these
3652 files were ending up world-writeable. This was not a big issue, because,
3653 being within the spool directory, they were not world-accessible. I have
3654 created a function called modefopen, which takes an additional mode
3655 argument. It sets umask(777), creates the file, chmods it to the required
3656 mode, then resets the umask. All the relevant calls to fopen() in the
3657 content scanning code have been changed to use this function.
3659 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3660 to 24 hours. This avoids potential overflow problems when processing G
3661 and H retry rules. I suspect nobody ever tinkers with this value.
3663 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3665 PH/45 When the plaintext authenticator is running as a client, the server's
3666 challenges are checked to ensure they are valid base64 strings. By
3667 default, the authentication attempt is cancelled if an invalid string is
3668 received. Setting client_ignore_invalid_base64 true ignores these errors.
3669 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3670 they are received. Thus, the responses can be made to depend on the
3671 challenges. If an invalid string is ignored, an empty string is placed in
3674 PH/46 Messages that are created by the autoreply transport now contains a
3675 References: header, in accordance with RFCs 2822 and 3834.
3677 PH/47 Added authenticated_sender_force to the smtp transport.
3679 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3681 PH/49 Installed latest patch from the Sieve maintainer.
3683 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3684 was also set, the appendfile transport was unnecessarily scanning a
3685 directory of message files (e.g. for maildir delivery) to find the count
3686 of files (along with the size), even though it did not need this
3687 information. It now does the scan only if it needs to find either the
3688 size of the count of files.
3690 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3692 PH/52 Two bugs concerned with error handling when the smtp transport is
3695 (i) Exim was not creating retry information for temporary errors given
3696 for individual recipients after the DATA command when the smtp transport
3697 was used in LMTP mode. This meant that they could be retried too
3698 frequently, and not timed out correctly.
3700 (ii) Exim was setting the flag that allows error details to be returned
3701 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3702 recipients that were returned after the DATA command.
3704 PH/53 This is related to PH/52, but is more general: for any failing address,
3705 when detailed error information was permitted to be returned to the
3706 sender, but the error was temporary, then after the final timeout, only
3707 "retry timeout exceeded" was returned. Now it returns the full error as
3708 well as "retry timeout exceeded".
3710 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3711 do this, and (what is worse) MTAs that accept it.
3713 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3714 will now be deprecated.
3716 PH/56 New os.c-cygwin from the Cygwin maintainer.
3718 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3719 formats (previously only available in exim formats via -bpr, -bpru,
3720 and -bpra. Now also available in native and exiqgrep formats)
3722 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3723 with very large, slow to parse queues
3725 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3727 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3729 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3730 responses to authentication challenges, though it was showing the
3731 challenges; (ii) I've removed the CR characters from the debug output for
3734 PH/58 Allow for the insertion of a newline as well as a space when a string
3735 is turned into more than one encoded-word during RFC 2047 encoding. The
3736 Sieve code now uses this.
3738 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3739 data_4xx, lost_connection, tls_required.
3741 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3742 message was being sent as an SMTP response.
3744 PH/61 Add -l and -k options to exicyclog.
3746 PH/62 When verifying, if an address was redirected to one new address, so that
3747 verification continued, and the new address failed or deferred after
3748 having set something in $address_data, the value of $address_data was not
3749 passed back to the ACL. This was different to the case when no
3750 redirection occurred. The value is now passed back in both cases.
3752 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3753 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3754 use login_cap.h, so on its own it isn't the distinguishing feature. The
3755 new name refers directly to the setclassresources() function.
3757 PH/65 Added configuration files for NetBSD3.
3759 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3761 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3762 is preferred over IPv4.
3764 PH/68 The bounce_return_message and bounce_return_body options were not being
3765 honoured for bounces generated during the reception of non-SMTP messages.
3766 In particular, this applied to messages rejected by the ACL. This bug has
3767 been fixed. However, if bounce_return_message is true and bounce_return_
3768 body is false, the headers that are returned for a non-SMTP message
3769 include only those that have been read before the error was detected.
3770 (In the case of an ACL rejection, they have all been read.)
3772 PH/69 The HTML version of the specification is now built in a directory called
3773 spec_html instead of spec.html, because the latter looks like a path with
3774 a MIME-type, and this confuses some software.
3776 PH/70 Catch two compiler warnings in sieve.c.
3778 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3779 function verify_get_ident() calls ip_connect() to connect a socket, but
3780 if the "connect()" function timed out, ip_connect() used to close the
3781 socket. However, verify_get_ident() also closes the socket later, and in
3782 between Exim writes to the log, which may get opened at this point. When
3783 the socket was closed in ip_connect(), the log could get the same file
3784 descriptor number as the socket. This naturally causes chaos. The fix is
3785 not to close the socket in ip_connect(); the socket should be closed by
3786 the function that creates it. There was only one place in the code where
3787 this was missing, in the iplookup router, which I don't think anybody now
3788 uses, but I've fixed it anyway.
3790 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3791 well as to direct DNS lookups. Otherwise the handling of names in host
3792 lists is inconsistent and therefore confusing.
3798 PH/01 Two changes to the default runtime configuration:
3800 (1) Move the checks for relay_from_hosts and authenticated clients from
3801 after to before the (commented out) DNS black list checks.
3803 (2) Add control=submission to the relay_from_hosts and authenticated
3804 clients checks, on the grounds that messages accepted by these
3805 statements are most likely to be submissions.
3807 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3809 (1) Generate an error if the third argument for the ${prvs expansion is
3812 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3815 (3) Reset the variables that are obtained from the first argument of
3816 ${prvscheck and used in the second argument before leaving the code,
3817 because their memory is reclaimed, so using them afterwards may do
3820 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3821 one (it's much easier than Tom thought :-).
3823 (5) Because of (4), we can now allow for the use of $prvscheck_result
3824 inside the third argument.
3826 PH/03 For some reason, the default setting of PATH when running a command from
3827 a pipe transport was just "/usr/bin". I have changed it to
3830 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3831 anything to be listed in the output from -bV.
3833 PH/05 When a filter generated an autoreply, the entire To: header line was
3834 quoted in the delivery log line, like this:
3836 => >A.N.Other <ano@some.domain> <original@ddress> ...
3838 This has been changed so that it extracts the operative address. There
3839 may be more than one such address. If so, they are comma-separated, like
3842 => >ano@some.domain,ona@other.domain <original@ddress> ...
3844 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3845 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3846 not being looked up in the rDNS to get a host name, Exim was showing the
3847 IP address twice in Received: lines, even though the IP addresses were
3848 identical. For example:
3850 Received: from [1.2.3.4] (helo=[1.2.3.4])
3852 However, if the real host name was known, it was omitting the HELO data
3853 if it matched the actual IP address. This has been tidied up so that it
3854 doesn't show the same IP address twice.
3856 PH/07 When both +timestamp and +memory debugging was on, the value given by
3857 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3858 called by the debug printing, thereby overwriting the timestamp buffer.
3859 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3861 PH/08 When the original message was included in an autoreply transport, it
3862 always said "this is a copy of the message, including all the headers",
3863 even if body_only or headers_only was set. It now gives an appropriate
3866 PH/09 Applied a patch from the Sieve maintainer which:
3868 o fixes some comments
3869 o adds the (disabled) notify extension core
3870 o adds some debug output for the result of if/elsif tests
3871 o points to the current vacation draft in the documentation
3872 and documents the missing references header update
3876 o fixes a bug in processing the envelope test (when testing
3877 multiple envelope elements, the last element determined the
3880 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3881 Electronic Mail") by including:
3883 Auto-submitted: auto-generated
3885 in the messages that it generates (bounce messages and others, such as
3886 warnings). In the case of bounce messages for non-SMTP messages, there was
3887 also a typo: it was using "Auto_submitted" (underscore instead of
3888 hyphen). Since every message generated by Exim is necessarily in response
3889 to another message, thes have all been changed to:
3891 Auto-Submitted: auto-replied
3893 in accordance with these statements in the RFC:
3895 The auto-replied keyword:
3897 - SHOULD be used on messages sent in direct response to another
3898 message by an automatic process,
3900 - MUST NOT be used on manually-generated messages,
3902 - MAY be used on Delivery Status Notifications (DSNs) and Message
3903 Disposition Notifications (MDNs),
3905 - MUST NOT be used on messages generated by automatic or periodic
3906 processes, except for messages which are automatic responses to
3909 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3910 to the default Received: header definition.
3912 PH/12 Added log selector acl_warn_skipped (default on).
3914 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3915 variables because (a) they are in the wrong storage pool and (b) even if
3916 they were copied, it wouldn't work properly because of the caching.
3918 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3919 checking when decoding. Apparently there are clients that generate
3920 overlong encoded strings. Why am I not surprised?
3922 PH/15 If the first argument of "${if match_address" was not empty, but did not
3923 contain an "@" character, Exim crashed. Now it writes a panic log message
3924 and treats the condition as false.
3926 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3928 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3929 extension "envelope-auth". The code is finished and in agreement with
3930 other implementations, but there is no documentation so far and in fact,
3931 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3932 not changing the active code.
3934 Print executed "if" and "elsif" statements when debugging is used. This
3935 helps a great deal to understand what a filter does.
3937 Document more things not specified clearly in RFC3028. I had all this
3938 sorted out, when out of a sudden new issues came to my mind. Oops."
3940 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3943 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3944 canonical form (as documented). However, after a host name lookup from
3945 the IP address, check_host() was doing a simple string comparison with
3946 addresses acquired from the DNS when checking that the found name did
3947 have the original IP as one of its addresses. Since any found IPv6
3948 addresses are likely to be in abbreviated form, the comparison could
3949 fail. Luckily, there already exists a function for doing the comparison
3950 by converting both addresses to binary, so now that is used instead of
3951 the text comparison.
3953 PH/20 There was another similar case to PH/19, when a complete host name was
3954 given in a host list; looking up its IP address could give an abbreviated
3955 form, whereas the current host's name might or might not be abbreviated.
3956 The same fix has been applied.
3962 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3963 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3966 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3967 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3969 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3971 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3972 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3973 Also, for "Auto-Submitted", treat anything other than "no" as
3974 non-personal, in accordance with RFC 3834. (Previously it treated
3975 anything starting "auto-" as non-personal.)
3977 TF/01 The control=submission/name=... option had a problem with syntax
3978 errors if the name included a slash character. The /name= option
3979 now slurps the rest of the string, so it can include any characters
3980 but it must come last in the list of options (after /sender_retain
3983 PH/05 Some modifications to the interface to the fake nameserver for the new
3991 TK/01 Added the "success_on_redirect" address verification option. See
3992 NewStuff for rationale and an example.
3994 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3996 PH/02 Patch to exigrep to allow it to work on syslog lines.
3998 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3999 fread() to skip over the body file's header line, because in Cygwin the
4000 header line is locked and is inaccessible.
4002 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4003 co-exist for some time) to make it clear that it is the Exim ID that is
4004 referenced, not the Message-ID: header line.
4006 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4007 string_format() function, because snprintf() does not exist on all
4010 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4011 ${stat: expansion item.
4013 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4014 protocol synchronization error", to keep the pedants happy.
4016 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4017 well as for IRIX systems, when gcc is being used. See the host.c source
4020 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4022 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4025 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4026 transport and to the smtp transport in LMTP mode.
4028 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4030 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4031 run a filter in a subprocess. This could lead to confusion in subsequent
4032 lookups in the parent process. There should also be a search_tidyup() at
4033 the end of the subprocess.
4035 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4036 only if the host matched helo_try_verify_hosts, which caused the
4037 verification to occur when the EHLO/HELO command was issued. The ACL just
4038 tested the remembered result. Now, if a previous verification attempt has
4039 not happened, "verify = helo" does it there and then.
4041 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4043 TK/03 Fix log output including CR from clamd.
4045 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4046 exist provoked a memory error which could cause a segfault.
4048 PH/15 Installed PCRE 6.2
4050 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4052 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4053 of the problem. Specifically, suggested +O2 rather than +O1 for the
4056 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4058 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4059 record, the port was not correctly logged when the outgoing_port log
4060 selector was set (it logged the transort's default port).
4062 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4063 fallback_hosts, and "hosts" in the smtp transport.
4065 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4066 host errors such as "Connection refused".
4068 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4069 authentication with radiusclient 0.4.9:
4071 - Error returned from rc_read_config was caught wrongly
4072 - Username/password not passed on to radius server due to wrong length.
4074 The presumption is that some radiusclient API changes for 4.51/PH/17
4075 were not taken care of correctly. The code is still untested by me (my
4076 Linux distribution still has 0.3.2 of radiusclient), but it was
4077 contributed by a Radius user.
4079 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4080 expanding the "port" option of the smtp transport.
4082 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4083 while reading a MIME header. Thanks to Tom Hughes for a patch.
4085 PH/24 Include config.h inside local_scan.h so that configuration settings are
4088 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4089 that in an ACL for RCPT (for example), you can examine exactly what was
4092 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4093 commands, but it was not correctly comparing the address with the actual
4094 client host address. Thus, it would show the EHLO address in Received:
4095 header lines when this was not necessary.
4097 PH/27 Added the % operator to ${eval:}.
4099 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4100 it should be ignoring failures (because with -C, for example, it has lost
4101 privilege). It wasn't ignoring creation failures other than "already
4104 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4107 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4108 because an input line was too long, either on its own, or by virtue of
4109 too many continuations, the temporary file was not being removed, and the
4110 return code was incorrect.
4112 PH/31 Missing "BOOL" in function definition in filtertest.c.
4114 PH/32 Applied Sieve patches from the maintainer.
4116 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4118 PH/33 Added "verify = not_blind".
4120 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4121 Local/Makefile (with some defaults set). These are used in built scripts
4122 such as exicyclog, but they have never been used in the exim_install
4123 script (though there are many overriding facilities there). I have
4124 arranged that the exim_install script now takes note of these two
4127 PH/35 Installed configuration files for Dragonfly.
4129 PH/36 When a locally submitted message by a trusted user did not contain a
4130 From: header, and the sender address was obtained from -f or from an SMTP
4131 MAIL command, and the trusted user did not use -F to supply a sender
4132 name, $originator_name was incorrectly used when constructing a From:
4133 header. Furthermore, $originator_name was used for submission mode
4134 messages from external hosts without From: headers in a similar way,
4135 which is clearly wrong.
4137 PH/37 Added control=suppress_local_fixups.
4139 PH/38 When log_selector = +received_sender was set, and the addition of the
4140 sender made the log line's construction buffer exactly full, or one byte
4141 less than full, an overflow happened when the terminating "\n" was
4144 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4145 when the result of a list match is failure because a DNS lookup failed.
4147 PH/40 RM_COMMAND is now used in the building process.
4149 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4150 the "build-* directories that it finds.
4152 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4153 address in a domain literal was a prefix of an interface address.
4155 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4156 when verifying a sender address, unless rewrite_headers is false.
4158 PH/44 Wrote a long comment about why errors_to addresses are verified as
4159 recipients, not senders.
4161 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4162 the ratelimit ACL was added.
4164 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4166 PH/46 Added extra information about PostgreSQL errors to the error string.
4168 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4169 avoiding the need to install special zones in a real server. This is
4170 backwards compatible; if it can't find the fake resolver, it drops back.
4171 Thus, both old and new test suites can be run.
4173 TF/02 Added util/ratelimit.pl
4175 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4176 clock is set back in time.
4178 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4179 Candler <B.Candler@pobox.com>.
4181 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4182 OK for addresses that are the result of redirections.
4184 PH/48 A number of further additions for the benefit of the new test suite,
4185 including a fake gethostbyname() that interfaces to the fake DNS resolver
4188 TF/06 The fix for widen_domains has also been applied to qualify_single and
4189 search_parents which are the other dnslookup options that can cause
4192 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4195 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4197 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4198 service" if it encountered an MX record with an empty target hostname.
4199 The message is now "an MX or SRV record indicated no SMTP service".
4201 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4202 if the DNS of the sending site is misconfigured. This is quite a
4203 common situation. This change restores the behaviour of treating a
4204 helo verification defer as a failure.
4206 PH/51 If self=fail was set on a router, the bounce message did not include the
4207 actual error message.
4213 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4215 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4216 command itself ended in error, the underlying message about the transport
4217 filter timeout was being overwritten with the pipe command error. Now the
4218 underlying error message should be appended to the second error message.
4220 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4222 PH/02 Reduce the amount of output that "make" produces by default. Full output
4223 can still be requested.
4225 PH/03 The warning log line about a condition test deferring for a "warn" verb
4226 was being output only once per connection, rather than after each
4227 occurrence (because it was using the same function as for successful
4228 "warn" verbs). This seems wrong, so I have changed it.
4230 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4231 it should not have, which might have caused a crash in the right
4232 circumstances, but probably never did.
4234 PH/04 Installed a modified version of Tony Finch's patch to make submission
4235 mode fix the return path as well as the Sender: header line, and to
4236 add a /name= option so that you can make the user's friendly name appear
4239 TF/03 Added the control = fakedefer ACL modifier.
4241 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4242 Mark Lowes for thorough testing.
4244 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4246 TK/03 Merged latest SRS patch from Miles Wilton.
4248 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4249 with the definition in sysexits.h (which is #included earlier).
4250 Fortunately, Exim does not actually use EX_OK. The code used to try to
4251 preserve the sysexits.h value, by assuming that macro definitions were
4252 scanned for macro replacements. I have been disabused of this notion,
4253 so now the code just undefines EX_OK before #including unistd.h.
4255 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4256 in the smtp transport. When a block could not be written in a single
4257 write() function, the timeout was being re-applied to each part-write.
4258 This seems wrong - if the receiver was accepting one byte at a time it
4259 would take for ever. The timeout is now adjusted when this happens. It
4260 doesn't have to be particularly precise.
4262 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4263 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4265 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4266 without a domain if the check to <postmaster@domain> fails.
4268 SC/01 Eximstats: added -xls and the ability to specify output files
4269 (patch written by Frank Heydlauf).
4271 SC/02 Eximstats: use FileHandles for outputting results.
4273 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4275 SC/04 Eximstats: fixed display of large numbers with -nvr option
4277 SC/05 Eximstats: fixed merging of reports with empty tables.
4279 SC/06 Eximstats: added the -include_original_destination flag
4281 SC/07 Eximstats: removed tabs and trailing whitespace.
4283 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4285 TK/06 MBOX spool code: Add real "From " MBOX separator line
4286 so the .eml file is really in mbox format (even though
4287 most programs do not really care). Patch from Alex Miller.
4289 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4290 The latter is generated from $received_to and is only set if the
4291 message has one envelope recipient. SA can use these headers,
4292 obviously out-of-the-box. Patch from Alex Miller.
4294 PH/08 The ${def test on a variable was returning false if the variable's
4295 value was "0", contrary to what the specification has always said!
4296 The result should be true unless the variable is empty.
4298 PH/09 The syntax error of a character other than { following "${if
4299 def:variable_name" (after optional whitespace) was not being diagnosed.
4300 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4301 accidental colon was present, for example, could give incorrect results.
4303 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4304 result is used (not including appendfile, where other changes are about
4307 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4308 This involved changing a lot of size variables from int to off_t. It
4309 should work with maildirs and everything.
4311 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4312 spamd dying while we are connected to it.
4314 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4317 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4318 function for BDB 4.3.
4320 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4322 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4323 the sources for PCRE have been re-arranged and more files are now
4326 PH/15 The code I had for printing potentially long long variables in PH/11
4327 above was not the best (it lost precision). The length of off_t variables
4328 is now inspected at build time, and an appropriate printing format (%ld
4329 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4330 to be "long long int" or "long int". This is needed for the internal
4331 formatting function string_vformat().
4333 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4334 the configuration file to be ":syslog", then the script "guesses" where
4335 the logs files are, rather than using the compiled in default. In our
4336 case the guess is not the same as the compiled default, so the script
4337 suddenly stopped working when I started to use syslog. The patch checks
4338 to see if log_file_path is "". If so, it attempts to read it from exim
4339 with no configuration file to get the compiled in version, before it
4340 falls back to the previous guessing code."
4342 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4343 implementing BATV in an Exim configuration. See NewStuff for the gory
4346 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4347 Makefile that are specific to HP-UX.
4349 PH/18 If the "use_postmaster" option was set for a recipient callout together
4350 with the "random" option, the postmaster address was used as the MAIL
4351 FROM address for the random test, but not for the subsequent recipient
4352 test. It is now used for both.
4354 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4355 patch removes a few documentation additions to RFC 3028, because the
4356 latest draft now contains them. It adds the new en;ascii-case comparator
4357 and a new error check for 8bit text in MIME parts. Comparator and
4358 require names are now matched exactly. I enabled the subaddress
4359 extension, but it is not well tested yet (read: it works for me)."
4361 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4362 rework some of the code of TK/09 above to avoid the hardwired use of
4363 "%lld" and "long long". Replaced the call to snprintf() with a call to
4366 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4367 records point to non-existent hosts", "retry timeout exceeded", and
4368 "retry time not reached for any host after a long failure period".
4370 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4371 experimental DomainKeys support:
4373 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4374 (2) On an error such as an illegally used "control", the wrong name for
4375 the control was given.
4377 These problems did NOT occur unless DomainKeys support was compiled.
4379 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4381 PH/24 Added ${if match_ip condition.
4383 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4384 databases so that it will be absolutely obvious if a crash occurs in the
4385 DB library. This is a regular occurrence (often caused by mis-matched
4388 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4389 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4390 picked up on a user's system that detects such things. There doesn't seem
4391 to be a gcc warning option for this - only an attribute that has to be
4392 put on the function's prototype. It seems that in Fedora Core 4 they have
4393 set this on a number of new functions. No doubt there will be more in due
4396 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4397 specify a transport. However, if an address that was verified by such a
4398 router was the subject of a callout, Exim crashed because it tried to
4399 read the rcpt_include_affixes from the non-existent transport. Now it
4400 just assumes that the setting of that option is false. This bug was
4401 introduced by 4.51/PH/31.
4403 PH/28 Changed -d+all to exclude +memory, because that information is very
4404 rarely of interest, but it makes the output a lot bigger. People tend to
4405 do -d+all out of habit.
4407 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4408 code in os-type was giving problems when libc.so lives in lib64, like on
4411 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4412 aren't the modern standard, and it seems that some systems' include files
4413 don't always have them. Exim was already checking for some of the newer
4414 ones like T_AAAA, and defining it itself. I've added checks for all the
4415 record types that Exim uses.
4417 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4418 not automatically generating a new one, as it is supposed to. This
4419 prevented TLS from working. If the file did exist, but contained invalid
4420 data, a new version was generated, as expected. It was only the case of a
4421 non-existent file that was broken.
4423 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4424 with a change in libdomainkeys > 0.64.
4426 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4427 from DNS. If the selector record carries the flag, it now has
4428 precedence over the domain-wide flag.
4430 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4432 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4433 the use of a port name that isn't defined in /etc/services) occurred, the
4434 message was deferred as in a normal delivery, and thus remained on the
4435 spool, instead of being failed because of the mua_wrapper setting. This
4436 is now fixed, and I tidied up some of the mua_wrapper messages at the
4439 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4440 the messages in a hash of arrays rather than using individual hashes.
4441 This is a bit cleaner and results in dramatic memory savings, albeit
4442 at a slight CPU cost.
4444 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4445 as requested by Marc Sherman.
4447 SC/10 Eximstats: added histograms for user specified patterns as requested
4450 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4452 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4453 fopen() in the content-scanning modules that did not already have it.
4459 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4460 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4462 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4464 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4466 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4467 to test Sieve filters that use "vacation".
4469 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4470 that changes the way the GnuTLS parameters are stored in the cache file.
4471 The new format can be generated externally. For backward compatibility,
4472 if the data in the cache doesn't make sense, Exim assumes it has read an
4473 old-format file, and it generates new data and writes a new file. This
4474 means that you can't go back to an older release without removing the
4477 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4478 work if there are any delivery delays because "one_time" forces the
4479 parent to be marked "delivered", so its unseen clone is never tried
4480 again. For this reason, Exim now forbids the simultaneous setting of
4483 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4484 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4485 entry if you want to know the details. The fix, however, neglected to
4486 consider the case when local delivery batching is involved. The test for
4487 "previously delivered" was not happening when checking to see if an
4488 address could be batched with a previous (undelivered) one; under
4489 certain circumstances this could lead to multiple deliveries to the same
4492 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4493 in its include files, and this causes problems building Exim.
4495 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4496 header_syntax) but Exim was just ignoring anything given after a slash.
4497 In particular, this caused confusion with an attempt to use "verify =
4498 reverse_host_lookup/defer_ok". An error is now given when options are
4499 supplied for verify items that do not have them. (Maybe reverse_host_
4500 lookup should have a defer_ok option, but that's a different point.)
4502 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4503 defined by RFC 821) to 2048, because there were problems with some AUTH
4504 commands, and RFC 1869 says the size should be increased for extended
4505 SMTP commands that take arguments.
4507 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4510 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4511 "unknown" error; now it says that the functionality isn't in the binary.
4513 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4514 an address' error message when a string expansion fails (syntax or
4515 whatever). Otherwise the password may appear in the log. Following change
4516 PH/42 below, there is no longer a chance of it appearing in a bounce
4519 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4521 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4522 of its addresses was ever tried. (Bugzilla bug #2.)
4524 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4525 the result incorrectly in the debug output. (It correctly added a newline
4526 to what was transported.)
4528 TF/01 Added $received_time.
4530 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4531 commented out examples of how to interface to a virus scanner and to
4532 SpamAssassin. Also added commented examples of av_scanner and
4533 spamd_address settings.
4535 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4536 and controls are allowed in which ACLs. There were a couple of minor
4537 errors. Some of the entries in the conditions table (which is a table of
4538 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4539 negation of where the condition IS allowed.
4541 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4543 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4544 header file does not have a version number, so I've had to invent a new
4545 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4546 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4547 radiusclient), but it was contributed by a Radius user.
4549 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4550 files or directories, for OpenSSL.
4552 PH/19 When an Exim process that is running as root has to create an Exim log
4553 file, it does so in a subprocess that runs as exim:exim so as to get the
4554 ownership right at creation (otherwise, other Exim processes might see
4555 the file with the wrong ownership). There was no test for failure of this
4556 fork() call, which would lead to the process getting stuck as it waited
4557 for a non-existent subprocess. Forks do occasionally fail when resources
4558 run out. I reviewed all the other calls to fork(); they all seem to check
4561 PH/20 When checking for unexpected SMTP input at connect time (before writing
4562 the banner), Exim was not dealing correctly with a non-positive return
4563 from the read() function. If the client had disconnected by this time,
4564 the result was a log entry for a synchronization error with an empty
4565 string after "input=" when read() returned zero. If read() returned -1
4566 (an event I could not check), uninitialized data bytes were printed.
4567 There were reports of junk text (parts of files, etc) appearing after
4570 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4572 PH/22 Added support for macro redefinition, and (re)definition in between
4573 driver and ACL definitions.
4575 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4576 forgetting to use the resulting value; it was using the unexpanded value.
4578 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4579 hadn't been configured. The fix is from Juergen Kreileder, who
4580 understands it better than I do:
4582 "Here's what I see happening with three configured cyrus_sasl
4583 authenticators configured (plain, login, cram-md5):
4585 On startup auth_cyrus_sasl_init() gets called for each of these.
4586 This means three calls to sasl_listmech() without a specified mech_list.
4587 => SASL tests which mechs of all available mechs actually work
4588 => three warnings about OTP not working
4589 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4591 With the patch, sasl_listmech() also gets called three times. But now
4592 SASL's mech_list option is set to the server_mech specified in the the
4593 authenticator. Or in other words, the answer from sasl_listmech()
4594 gets limited to just the mech you're testing for (which is different
4596 => the return list contains just 'plain' or 'login', 'cram-md5' or
4597 nothing depending on the value of ob->server_mech.
4599 I've just tested the patch: Authentication still works fine,
4600 unavailable mechs specified in the exim configuration are still
4601 caught, and the auth.log warnings about OTP are gone."
4603 PH/25 When debugging is enabled, the contents of the command line are added
4604 to the debugging output, even when log_selector=+arguments is not
4607 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4608 answer is "GNU", and only if the return is "GNU/something" is the answer
4611 PH/27 $acl_verify_message is now set immediately after the failure of a
4612 verification in an ACL, and so is available in subsequent modifiers. In
4613 particular, the message can be preserved by coding like this:
4615 warn !verify = sender
4616 set acl_m0 = $acl_verify_message
4618 Previously, $acl_verify_message was set only while expanding "message"
4619 and "log_message" when a very denied access.
4621 PH/28 Modified OS/os.c-Linux with
4623 -#ifndef OS_LOAD_AVERAGE
4624 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4626 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4627 nomenclature these days.)
4629 PH/29 Installed patch from the Sieve maintainer that adds the options
4630 sieve_useraddress and sieve_subaddress to the redirect router.
4632 PH/30 In these circumstances:
4633 . Two addresses routed to the same list of hosts;
4634 . First host does not offer TLS;
4635 . First host accepts first address;
4636 . First host gives temporary error to second address;
4637 . Second host offers TLS and a TLS session is established;
4638 . Second host accepts second address.
4639 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4640 and peerdn, if requested) that were in fact used only for the second
4643 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4644 attention to any local part prefix or suffix that was matched by the
4645 router that accepted the address. It now behaves in the same way as it
4646 does for delivery: the affixes are removed from the local part unless
4647 rcpt_include_affixes is set on the transport.
4649 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4650 timeout during the DATA phase of an incoming message.
4652 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4653 applied a patch sanctioned by the Sieve maintainer.
4655 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4656 the uid or gid is negative. A case of a negative gid caused this to be
4657 noticed. The fix allows for either to be negative.
4659 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4660 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4663 PH/36 The change PH/12 above was broken. Fixed it.
4665 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4666 the grounds that routing the same address twice would always produce the
4667 same answer. This might have been true once, but it is certainly no
4668 longer true now. Routing a child address may depend on the previous
4669 routing that produced that child. Some complicated redirection strategies
4670 went wrong when messages had multiple recipients, and made Exim's
4671 behaviour dependent on the order in which the addresses were given.
4673 I have moved the duplicate checking until after the routing is complete.
4674 Exim scans the addresses that are assigned to local and remote
4675 transports, and removes any duplicates. This means that more work will be
4676 done, as duplicates will always all be routed, but duplicates are
4677 presumably rare, so I don't expect this is of any significance.
4679 For deliveries to pipes, files, and autoreplies, the duplicate checking
4680 still happens during the routing process, since they are not going to be
4683 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4684 It corrects a timeout issue with spamd. This is Ian's comment: "The
4685 background is that sometimes spamd either never reads data from a
4686 connection it has accepted, or it never writes response data. The exiscan
4687 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4688 blindly assumes that writes won't block so it may never time out."
4690 PH/39 Allow G after quota size as well as K and M.
4692 PH/40 The value set for $authenticated_id in an authenticator may not contain
4693 binary zeroes or newlines because the value is written to log lines and
4694 to spool files. There was no check on this. Now the value is run through
4695 the string_printing() function so that such characters are converted to
4696 printable escape sequences.
4698 PH/41 $message_linecount is a new variable that contains the total number of
4699 lines in the message. Compare $body_linecount, which is the count for the
4702 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4703 bounce and delay warning messages, except in certain special cases, which
4706 (a) An SMTP error message from a remote host;
4707 (b) A message specified in a :fail: redirection;
4708 (c) A message specified in a "fail" command in a system filter;
4709 (d) A message specified in a FAIL return from the queryprogram router;
4710 (e) A message specified by the cannot_route_message router option.
4712 In these cases only, Exim does include the error details in bounce and
4713 warning messages. There are also a few cases where bland messages such
4714 as "unrouteable address" or "local delivery error" are given.
4716 PH/43 $value is now also set for the "else" part of a ${run expansion.
4718 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4719 being worked on, but at least Exim now implements the latest version to
4722 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4723 process to complete was treated as a delivery failure, a timeout while
4724 writing the message to the pipe was logged, but erroneously treated as a
4725 successful delivery. Such timeouts include transport filter timeouts. For
4726 consistency with the overall process timeout, these timeouts are now
4727 treated as errors, giving rise to delivery failures by default. However,
4728 there is now a new Boolean option for the pipe transport called
4729 timeout_defer, which, if set TRUE, converts the failures into defers for
4730 both kinds of timeout. A transport filter timeout is now identified in
4733 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4734 systems where "make" and "gmake" are different, calling "gmake" at top
4735 level broke things. I've arranged for the value of $(MAKE) to be passed
4736 from the Makefile to this script so that it can call the same version of
4740 A note about Exim versions 4.44 and 4.50
4741 ----------------------------------------
4743 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4744 changes of various kinds. As a consequence, a big documentation update was
4745 needed. This delayed the release for rather longer than seemed good, especially
4746 in the light of a couple of (minor) security issues. Therefore, the changes
4747 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4748 release. So 4.44 and 4.50 are in effect two different branches that both start
4751 I have left the 4.50 change log unchanged; it contains all the changes since
4752 4.43. The change log for 4.44 is below; many of its items are identical to
4753 those for 4.50. This seems to be the most sensible way to preserve the
4754 historical information.
4760 1. Minor wording change to the doc/README.SIEVE file.
4762 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4763 computation of the current number of files was incorrect.
4765 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4766 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4769 4. Give more explanation in the error message when the command for a transport
4770 filter fails to execute.
4772 5. There are several places where Exim runs a non-Exim command in a
4773 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4774 was being done only for the command run by the queryprogram router. It is
4775 now done for all such subprocesses. The other cases are: ${run, transport
4776 filters, and the commands run by the lmtp and pipe transports.
4778 6. Added CONFIGURE_GROUP build-time option.
4780 7. Some older OS have a limit of 256 on the maximum number of file
4781 descriptors. Exim was using setrlimit() to set 1000 as a large value
4782 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4783 systems. I've change it so that if it can't get 1000, it tries for 256.
4785 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4786 was an oversight, and furthermore, ever since the addition of extra
4787 controls (e.g. 4.43/32), the checks on when to allow different forms of
4788 "control" were broken. There should now be diagnostics for all cases when a
4789 control that does not make sense is encountered.
4791 9. Added the /retain_sender option to "control=submission".
4793 10. $recipients is now available in the predata ACL (oversight).
4795 11. Tidy the search cache before the fork to do a delivery from a message
4796 received from the command line. Otherwise the child will trigger a lookup
4797 failure and thereby defer the delivery if it tries to use (for example) a
4798 cached ldap connection that the parent has called unbind on.
4800 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4801 of $address_data from the recipient verification was clobbered by the
4802 sender verification.
4804 13. The value of address_data from a sender verification is now available in
4805 $sender_address_data in subsequent conditions in the ACL statement.
4807 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4809 15. Added a new option "connect=<time>" to callout options, to set a different
4812 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4813 was its contents. (It was OK if the option was not defined at all.)
4815 17. A "Completed" log line is now written for messages that are removed from
4816 the spool by the -Mrm option.
4818 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4819 information about exactly what failed.
4821 19. Added -dd to debug only the daemon process.
4823 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4824 handles timeouts, both on the server side and network timeouts. Renamed the
4825 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4827 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4828 It is now set to "smtps".
4830 22. $host_address is now set to the target address during the checking of
4831 ignore_target_hosts.
4833 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4834 being passed; this would have caused $sender_host_name to have been used if
4835 matching the list had actually called for a host name (not very likely,
4836 since this list is usually IP addresses). A host name is now passed as
4839 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4840 code that specifies a non-restarting handler (typically sigaction() in
4841 modern systems) in an attempt to fix a rare and obscure crash bug.
4843 25. Narrowed the window for a race in the daemon that could cause it to ignore
4844 SIGCHLD signals. This is not a major problem, because they are used only to
4845 wake it up if nothing else does.
4847 26. A malformed maildirsize file could cause Exim to calculate negative values
4848 for the mailbox size or file count. Odd effects could occur as a result.
4849 The maildirsize information is now recalculated if the size or filecount
4852 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4853 support for a long time. Removed HAVE_SYS_VFS_H.
4855 28. Installed the latest version of exipick from John Jetmore.
4857 29. In an address list, if the pattern was not a regular expression, an empty
4858 subject address (from a bounce message) matched only if the pattern was an
4859 empty string. Non-empty patterns were not even tested. This was the wrong
4860 because it is perfectly reasonable to use an empty address as part of a
4861 database query. An empty address is now tested by patterns that are
4862 lookups. However, all the other forms of pattern expect the subject to
4863 contain a local part and a domain, and therefore, for them, an empty
4864 address still always fails if the pattern is not itself empty.
4866 30. Exim went into a mad DNS loop when attempting to do a callout where the
4867 host was specified on an smtp transport, and looking it up yielded more
4868 than one IP address.
4870 31. Re-factored the code for checking spool and log partition space into a
4871 function that finds that data and another that does the check. The former
4872 is then used to implement four new variables: $spool_space, $log_space,
4873 $spool_inodes, and $log_inodes.
4875 32. The RFC2047 encoding function was originally intended for short strings
4876 such as real names; it was not keeping to the 75-character limit for
4877 encoded words that the RFC imposes. It now respects the limit, and
4878 generates multiple encoded words if necessary. To be on the safe side, I
4879 have increased the buffer size for the ${rfc2047: expansion operator from
4882 33. It is now permitted to omit both strings after an "if" condition; if the
4883 condition is true, the result is "true". As before, when the second string
4884 is omitted, a false condition yields an empty string. This makes it less
4885 cumbersome to write custom ACL and router conditions.
4887 34. Failure to deliver a bounce message always caused it to be frozen, even if
4888 there was an errors_to setting on the router. The errors_to setting is now
4891 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4892 canonical form (fully expanded) before being placed in
4893 $sender_host_address.
4895 36. The table in the code that translates DNS record types into text (T_A to
4896 "A" for instance) was missing entries for NS and CNAME. It is just possible
4897 that this could have caused confusion if both these types were looked up
4898 for the same domain, because the text type is used as part of Exim's
4899 per-process caching. But the chance of anyone hitting this buglet seems
4902 37. The dnsdb lookup has been extended in a number of ways.
4904 (1) There is a new type, "zns", which walks up the domain tree until it
4905 finds some nameserver records. It should be used with care.
4907 (2) There is a new type, "mxh", which is like "mx" except that it returns
4908 just the host names, not the priorities.
4910 (3) It is now possible to give a list of domains (or IP addresses) to be
4911 looked up. The behaviour when one of the lookups defers can be
4912 controlled by a keyword.
4914 (4) It is now possible to specify the separator character for use when
4915 multiple records are returned.
4917 38. The dnslists ACL condition has been extended: it is now possible to supply
4918 a list of IP addresses and/or domains to be looked up in a particular DNS
4921 39. Added log_selector=+queue_time_overall.
4923 40. When running the queue in the test harness, wait just a tad after forking a
4924 delivery process, to get repeatability of debugging output.
4926 41. Include certificate and key file names in error message when GnuTLS fails
4927 to set them up, because the GnuTLS error message doesn't include the name
4928 of the failing file when there is a problem reading it.
4930 42. Allow both -bf and -bF in the same test run.
4932 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4934 44. The "Exiscan patch" is now merged into the mainline Exim source.
4936 45. Sometimes the final signoff response after QUIT could fail to get
4937 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4938 < 0 before doing a fflush(). This bug looks as though it goes back to the
4939 introduction of TLS in release 3.20, but "sometimes" must have been rare
4940 because the tests only now provoked it.
4942 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4943 (this can affect the format of dates).
4945 47. exim_tidydb, when checking for the continued existence of a message for
4946 which it has found a message-specific retry record, was not finding
4947 messages that were in split spool directories. Consequently, it was
4948 deleting retry records that should have stayed in existence.
4950 48. Steve fixed some bugs in eximstats.
4952 49. The SPA authentication driver was not abandoning authentication and moving
4953 on to the next authenticator when an expansion was forced to fail,
4954 contradicting the general specification for all authenticators. Instead it
4955 was generating a temporary error. It now behaves as specified.
4957 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4958 (the order specifies the preference for clients). The order is now AES256,
4959 AES128, 3DES, ARCFOUR128.
4961 51. Small patch to Sieve code - explicitly set From: when generating an
4964 52. Exim crashed if a remote delivery caused a very long error message to be
4965 recorded - for instance if somebody sent an entire SpamAssassin report back
4966 as a large number of 550 error lines. This bug was coincidentally fixed by
4967 increasing the size of one of Exim's internal buffers (big_buffer) that
4968 happened as part of the Exiscan merge. However, to be on the safe side, I
4969 have made the code more robust (and fixed the comments that describe what
4972 53. Now that there can be additional text after "Completed" in log lines (if
4973 the queue_time_overall log selector is set), a one-byte patch to exigrep
4974 was needed to allow it to recognize "Completed" as not the last thing in
4977 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4978 patch that reportedly fixes this has been added. I am not expert enough to
4979 create a test for it. This is what the patch creator wrote:
4981 "I found a little strange behaviour of ldap code when working with
4982 Windows 2003 AD Domain, where users was placed in more than one
4983 Organization Units. When I tried to give exim partial DN, the exit code
4984 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4985 But simultaneously result of request was absolutely normal ldap result,
4986 so I produce this patch..."
4988 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4989 REFERENCE, so I have modified the code to exclude the patch when that macro
4992 55. Some experimental protocols are using DNS PTR records for new purposes. The
4993 keys for these records are domain names, not reversed IP addresses. The
4994 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4995 leaves it alone. Component reversal etc. now happens only for IP addresses.
4998 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5000 57. Double the size of the debug message buffer (to 2048) so that more of very
5001 long debug lines gets shown.
5003 58. The exicyclog utility now does better if the number of log files to keep
5004 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5006 59. Two changes related to the smtp_active_hostname option:
5008 (1) $smtp_active_hostname is now available as a variable.
5009 (2) The default for smtp_banner uses $smtp_active_hostname instead
5010 of $primary_hostname.
5012 60. The host_aton() function is supposed to be passed a string that is known
5013 to be a valid IP address. However, in the case of IPv6 addresses, it was
5014 not checking this. This is a hostage to fortune. Exim now panics and dies
5015 if the condition is not met. A case was found where this could be provoked
5016 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5017 components; fortuitously, this particular loophole had already been fixed
5018 by change 4.50/55 above.
5020 If there are any other similar loopholes, the new check in host_aton()
5021 itself should stop them being exploited. The report I received stated that
5022 data on the command line could provoke the exploit when Exim was running as
5023 exim, but did not say which command line option was involved. All I could
5024 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5025 running as the user.
5028 61. There was a buffer overflow vulnerability in the SPA authentication code
5029 (which came originally from the Samba project). I have added a test to the
5030 spa_base64_to_bits() function which I hope fixes it.
5033 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5034 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5036 63. The daemon start-up calls getloadavg() while still root for those OS that
5037 need the first call to be done as root, but it missed one case: when
5038 deliver_queue_load_max is set with deliver_drop_privilege. This is
5039 necessary for the benefit of the queue runner, because there is no re-exec
5040 when deliver_drop_privilege is set.
5042 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5043 This has been fixed.
5045 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5046 was in use, was not putting the data itself into the right store pool;
5047 consequently, it could be overwritten for a subsequent message in the same
5048 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5051 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5053 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5054 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5055 the function were treating the return as a boolean value, which happened to
5056 work because 0=false and not-0=true, but is not correct code.
5058 68. The host_aton() function was not handling scoped IPv6 addresses (those
5059 with, for example, "%eth0" on the end) correctly.
5061 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5062 negated items (that is, ~something) in unsigned ints. Some compilers
5063 apparently mutter when there is no cast.
5065 70. If an address verification called from an ACL failed, and did not produce a
5066 user-specific message (i.e. there was only a "system" message), nothing was
5067 put in $acl_verify_message. In this situation, it now puts the system
5070 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5071 session; change 4.31/43 added the unwanted input to the log line - except
5072 that it did not do this in the start of session case. It now does.
5074 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5075 This is wrong and can cause the other end to generate a synchronization
5076 error if it is another Exim or anything else that does the synchronization
5077 check. A QUIT command is no longer sent after a timeout.
5079 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5080 during host lookups.
5082 74. The defer_ok option of callout verification was not working if it was used
5083 when verifying addresses in header lines, that is, for this case:
5085 verify = header_sender/callout=defer_ok
5087 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5088 those file descriptors could be used for SMTP connections. If anything
5089 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5090 could be sent to the SMTP client, causing chaos. The daemon now opens
5091 stdin, stdout, and stderr to /dev/null when it puts itself into the
5094 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5095 log by default. The user can override this with suitable Perl magic.
5097 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5098 the log message when discard triggers, was not working for the DATA ACL or
5099 for the non-SMTP ACL.
5101 78. Error message wording change in sieve.c.
5103 79. If smtp_accept_max_per_host was set, the number of connections could be
5104 restricted to fewer than expected, because the daemon was trying to set up
5105 a new connection before checking whether the processes handling previous
5106 connections had finished. The check for completed processes is now done
5107 earlier. On busy systems, this bug wouldn't be noticed because something
5108 else would have woken the daemon, and it would have reaped the completed
5111 80. If a message was submitted locally by a user whose login name contained one
5112 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5113 It caused a spool format error. I have fixed the spool reading code. A
5114 related problem was that the "from" clause in the Received: line became
5115 illegal because of the space(s). It is now covered by ${quote_local_part.
5117 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5120 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5122 83. Patch from Sieve maintainer to fix unterminated string problem in
5123 "vacation" handling.
5125 84. Some minor changes to the Linux configuration files to help with other
5126 OS variants using glibc.
5128 85. One more patch for Sieve to update vacation handling to latest spec.
5131 ----------------------------------------------------
5132 See the note above about the 4.44 and 4.50 releases.
5133 ----------------------------------------------------
5139 1. Change 4.43/35 introduced a bug that caused file counts to be
5140 incorrectly computed when quota_filecount was set in an appendfile
5143 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5144 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5147 3. Give more explanation in the error message when the command for a transport
5148 filter fails to execute.
5150 4. There are several places where Exim runs a non-Exim command in a
5151 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5152 was being done only for the command run by the queryprogram router. It is
5153 now done for all such subprocesses. The other cases are: ${run, transport
5154 filters, and the commands run by the lmtp and pipe transports.
5156 5. Some older OS have a limit of 256 on the maximum number of file
5157 descriptors. Exim was using setrlimit() to set 1000 as a large value
5158 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5159 systems. I've change it so that if it can't get 1000, it tries for 256.
5161 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5162 was an oversight, and furthermore, ever since the addition of extra
5163 controls (e.g. 4.43/32), the checks on when to allow different forms of
5164 "control" were broken. There should now be diagnostics for all cases when a
5165 control that does not make sense is encountered.
5167 7. $recipients is now available in the predata ACL (oversight).
5169 8. Tidy the search cache before the fork to do a delivery from a message
5170 received from the command line. Otherwise the child will trigger a lookup
5171 failure and thereby defer the delivery if it tries to use (for example) a
5172 cached ldap connection that the parent has called unbind on.
5174 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5175 of $address_data from the recipient verification was clobbered by the
5176 sender verification.
5178 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5179 was its contents. (It was OK if the option was not defined at all.)
5181 11. A "Completed" log line is now written for messages that are removed from
5182 the spool by the -Mrm option.
5184 12. $host_address is now set to the target address during the checking of
5185 ignore_target_hosts.
5187 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5188 being passed; this would have caused $sender_host_name to have been used if
5189 matching the list had actually called for a host name (not very likely,
5190 since this list is usually IP addresses). A host name is now passed as
5193 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5194 code that specifies a non-restarting handler (typically sigaction() in
5195 modern systems) in an attempt to fix a rare and obscure crash bug.
5197 15. Narrowed the window for a race in the daemon that could cause it to ignore
5198 SIGCHLD signals. This is not a major problem, because they are used only to
5199 wake it up if nothing else does.
5201 16. A malformed maildirsize file could cause Exim to calculate negative values
5202 for the mailbox size or file count. Odd effects could occur as a result.
5203 The maildirsize information is now recalculated if the size or filecount
5206 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5207 support for a long time. Removed HAVE_SYS_VFS_H.
5209 18. Updated exipick to current release from John Jetmore.
5211 19. Allow an empty sender to be matched against a lookup in an address list.
5212 Previously the only cases considered were a regular expression, or an
5215 20. Exim went into a mad DNS lookup loop when doing a callout where the
5216 host was specified on the transport, if the DNS lookup yielded more than
5219 21. The RFC2047 encoding function was originally intended for short strings
5220 such as real names; it was not keeping to the 75-character limit for
5221 encoded words that the RFC imposes. It now respects the limit, and
5222 generates multiple encoded words if necessary. To be on the safe side, I
5223 have increased the buffer size for the ${rfc2047: expansion operator from
5226 22. Failure to deliver a bounce message always caused it to be frozen, even if
5227 there was an errors_to setting on the router. The errors_to setting is now
5230 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5231 canonical form (fully expanded) before being placed in
5232 $sender_host_address.
5234 24. Updated eximstats to version 1.33
5236 25. Include certificate and key file names in error message when GnuTLS fails
5237 to set them up, because the GnuTLS error message doesn't include the name
5238 of the failing file when there is a problem reading it.
5240 26. Expand error message when OpenSSL has problems setting up cert/key files.
5243 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5244 (this can affect the format of dates).
5246 28. exim_tidydb, when checking for the continued existence of a message for
5247 which it has found a message-specific retry record, was not finding
5248 messages that were in split spool directories. Consequently, it was
5249 deleting retry records that should have stayed in existence.
5251 29. eximstats updated to version 1.35
5252 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5253 1.35 - bugfix such that pie charts by volume are generated correctly
5255 30. The SPA authentication driver was not abandoning authentication and moving
5256 on to the next authenticator when an expansion was forced to fail,
5257 contradicting the general specification for all authenticators. Instead it
5258 was generating a temporary error. It now behaves as specified.
5260 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5261 (the order specifies the preference for clients). The order is now AES256,
5262 AES128, 3DES, ARCFOUR128.
5264 31. Small patch to Sieve code - explicitly set From: when generating an
5267 32. Exim crashed if a remote delivery caused a very long error message to be
5268 recorded - for instance if somebody sent an entire SpamAssassin report back
5269 as a large number of 550 error lines. This bug was coincidentally fixed by
5270 increasing the size of one of Exim's internal buffers (big_buffer) that
5271 happened as part of the Exiscan merge. However, to be on the safe side, I
5272 have made the code more robust (and fixed the comments that describe what
5275 33. Some experimental protocols are using DNS PTR records for new purposes. The
5276 keys for these records are domain names, not reversed IP addresses. The
5277 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5278 leaves it alone. Component reversal etc. now happens only for IP addresses.
5281 34. The host_aton() function is supposed to be passed a string that is known
5282 to be a valid IP address. However, in the case of IPv6 addresses, it was
5283 not checking this. This is a hostage to fortune. Exim now panics and dies
5284 if the condition is not met. A case was found where this could be provoked
5285 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5286 components; fortuitously, this particular loophole had already been fixed
5287 by change 4.50/55 or 4.44/33 above.
5289 If there are any other similar loopholes, the new check in host_aton()
5290 itself should stop them being exploited. The report I received stated that
5291 data on the command line could provoke the exploit when Exim was running as
5292 exim, but did not say which command line option was involved. All I could
5293 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5294 running as the user.
5297 35. There was a buffer overflow vulnerability in the SPA authentication code
5298 (which came originally from the Samba project). I have added a test to the
5299 spa_base64_to_bits() function which I hope fixes it.
5302 36. The daemon start-up calls getloadavg() while still root for those OS that
5303 need the first call to be done as root, but it missed one case: when
5304 deliver_queue_load_max is set with deliver_drop_privilege. This is
5305 necessary for the benefit of the queue runner, because there is no re-exec
5306 when deliver_drop_privilege is set.
5308 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5309 was in use, was not putting the data itself into the right store pool;
5310 consequently, it could be overwritten for a subsequent message in the same
5311 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5314 38. Sometimes the final signoff response after QUIT could fail to get
5315 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5316 < 0 before doing a fflush(). This bug looks as though it goes back to the
5317 introduction of TLS in release 3.20, but "sometimes" must have been rare
5318 because the tests only now provoked it.
5324 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5325 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5326 Now it returns an integer. A number of calls were still expecting a T/F
5327 return. Fortuitously, in all cases, the tests worked in OK situations,
5328 which is the norm. However, things would have gone wrong on any write
5329 failures on the smtp file descriptor. This function is used when sending
5330 messages over SMTP and also when doing verify callouts.
5332 2. When Exim is called to do synchronous delivery of a locally submitted
5333 message (the -odf or -odi options), it no longer closes stderr before doing
5336 3. Implemented the mua_wrapper option.
5338 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5340 5. Implemented the functions header_remove(), header_testname(),
5341 header_add_at_position(), and receive_remove_recipient(), and exported them
5344 6. If an ACL "warn" statement specified the addition of headers, Exim already
5345 inserted X-ACL-Warn: at the start if there was no header name. However, it
5346 was not making this test for the second and subsequent header lines if
5347 there were newlines in the string. This meant that an invalid header could
5348 be inserted if Exim was badly configured.
5350 7. Allow an ACL "warn" statement to add header lines at the start or after all
5351 the Received: headers, as well as at the end.
5353 8. Added the rcpt_4xx retry error code.
5355 9. Added postmaster_mailfrom=xxx to callout verification option.
5357 10. Added mailfrom=xxxx to the callout verification option, for verify=
5360 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5361 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5363 12. Inserted some casts to stop certain compilers warning when using pointer
5364 differences as field lengths or precisions in printf-type calls (mostly
5365 affecting debugging statements).
5367 13. Added optional readline() support for -be (dynamically loaded).
5369 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5370 same clock tick as a message's arrival, so that its received time was the
5371 same as the "first fail" time on the retry record, and that message
5372 remained on the queue past the ultimate address timeout, every queue runner
5373 would try a delivery (because it was past the ultimate address timeout) but
5374 after another failure, the ultimate address timeout, which should have then
5375 bounced the address, did not kick in. This was a "< instead of <=" error;
5376 in most cases the first failure would have been in the next clock tick
5377 after the received time, and all would be well.
5379 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5380 being recognized when the domain list was tested by the match_domain
5381 condition in an expansion string.
5383 16. Added the ${str2b64: operator.
5385 17. Exim was always calling setrlimit() to set a large limit for the number of
5386 processes, without checking whether the existing limit was already
5387 adequate. (It did check for the limit on file descriptors.) Furthermore,
5388 errors from getrlimit() and setrlimit() were being ignored. Now they are
5389 logged to the main and panic logs, but Exim does carry on, to try to do its
5390 job under whatever limits there are.
5392 18. Imported PCRE 5.0.
5394 19. Trivial typo in log message " temporarily refused connection" (the leading
5397 20. If the log selector return_path_on_delivery was set and an address was
5398 redirected to /dev/null, the delivery process crashed because it assumed
5399 that a return path would always be set for a "successful" delivery. In this
5400 case, the whole delivery is bypassed as an optimization, and therefore no
5403 21. Internal re-arrangement: the function for sending a challenge and reading
5404 a response while authentication was assuming a zero-terminated challenge
5405 string. It's now changed to take a pointer and a length, to allow for
5406 binary data in such strings.
5408 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5410 23. Exim was not respecting finduser_retries when seeking the login of the
5411 uid under which it was called; it was always trying 10 times. (The default
5412 setting of finduser_retries is zero.) Also, it was sleeping after the final
5413 failure, which is pointless.
5415 24. Implemented tls_on_connect_ports.
5417 25. Implemented acl_smtp_predata.
5419 26. If the domain in control=submission is set empty, Exim assumes that the
5420 authenticated id is a complete email address when it generates From: or
5421 Sender: header lines.
5423 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5424 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5425 chown and chgrp in /bin and hostname in /usr/bin.
5427 28. Exim was keeping the "process log" file open after each use, just as it
5428 does for the main log. This opens the possibility of it remaining open for
5429 long periods when the USR1 signal hits a daemon. Occasional processlog
5430 errors were reported, that could have been caused by this. Anyway, it seems
5431 much more sensible not to leave this file open at all, so that is what now
5434 29. The long-running daemon process does not normally write to the log once it
5435 has entered its main loop, and it closes the log before doing so. This is
5436 so that log files can straightforwardly be renamed and moved. However,
5437 there are a couple of unusual error situations where the daemon does write
5438 log entries, and I had neglected to close the log afterwards.
5440 30. The text of an SMTP error response that was received during a remote
5441 delivery was being truncated at 512 bytes. This is too short for some of
5442 the long messages that one sometimes sees. I've increased the limit to
5445 31. It is now possible to make retry rules that apply only when a message has a
5446 specific sender, in particular, an empty sender.
5448 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5449 it possible to be selective about when SMTP synchronization is enforced.
5451 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5453 32. Implemented hosts_connection_nolog.
5455 33. Added an ACL for QUIT.
5457 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5460 35. Added mailbox_size and mailbox_filecount to appendfile.
5462 36. Added control = no_multiline_responses to ACLs.
5464 37. There was a bug in the logic of the code that waits for the clock to tick
5465 in the case where the clock went backwards by a substantial amount such
5466 that the microsecond fraction of "now" was more than the microsecond
5467 fraction of "then" (but the whole seconds number was less).
5469 38. Added support for the libradius Radius client library this is found on
5470 FreeBSD (previously only the radiusclient library was supported).
5476 1. When certain lookups returned multiple values in the form name=value, the
5477 quoting of the values was not always being done properly. Specifically:
5478 (a) If the value started with a double quote, but contained no whitespace,
5480 (b) If the value contained whitespace other than a space character (i.e.
5481 tabs or newlines or carriage returns) it was not quoted.
5482 This fix has been applied to the mysql and pgsql lookups by writing a
5483 separate quoting function and calling it from the lookup code. The fix
5484 should probably also be applied to nisplus, ibase and oracle lookups, but
5485 since I cannot test any of those, I have not disturbed their existing code.
5487 2. A hit in the callout cache for a specific address caused a log line with no
5488 reason for rejecting RCPT. Now it says "Previous (cached) callout
5489 verification failure".
5491 3. There was an off-by-one bug in the queryprogram router. An over-long
5492 return line was truncated at 256 instead of 255 characters, thereby
5493 overflowing its buffer with the terminating zero. As well as fixing this, I
5494 have increased the buffer size to 1024 (and made a note to document this).
5496 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5497 when Exim is waiting for an SMTP response from a remote server, Exim
5498 restarts its select() call on the socket, thereby resetting its timeout.
5499 This is not a problem when such interrupts are rare. Somebody set up a cron
5500 job to run exiwhat every 2 minutes, which is less than the normal select()
5501 timeout (5 or 10 minutes). This meant that the select() timeout never
5502 kicked in because it was always reset. I have fixed this by comparing the
5503 time when an interrupt arrives with the time at the start of the first call
5504 to select(). If more time than the timeout has elapsed, the interrupt is
5505 treated as a timeout.
5507 5. Some internal re-factoring in preparation for the addition of Sieve
5508 extensions (by MH). In particular, the "personal" test is moved to a
5509 separate function, and given an option for scanning Cc: and Bcc: (which is
5510 not set for Exim filters).
5512 6. When Exim created an email address using the login of the caller as the
5513 local part (e.g. when creating a From: or Sender: header line), it was not
5514 quoting the local part when it contained special characters such as @.
5516 7. Installed new OpenBSD configuration files.
5518 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5519 try to make them clearer.
5521 9. Callout options, other than the timeout value, were being ignored when
5522 verifying sender addresses in header lines. For example, when using
5524 verify = header_sender/callout=no_cache
5526 the cache was (incorrectly) being used.
5528 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5529 only the Cygwin environment.
5531 11. When return_path_on_delivery was set as a log selector, if different remote
5532 addresses in the same message used different return paths and parallel
5533 remote delivery occurred, the wrong values would sometimes be logged.
5534 (Whenever a remote delivery process finished, the return path value from
5535 the most recently started remote delivery process was logged.)
5537 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5538 lines when AUTH and/or TLS are in use. This is the "received protocol"
5539 field. Exim used to use "asmtp" for authenticated SMTP, without any
5540 indication (in the protocol name) for TLS use. Now it follows the RFC and
5541 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5542 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5543 names appear in log lines as well as in Received: header lines.
5545 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5546 extensions, and comparison tests, and to fix some bugs.
5548 14. Changes to the "personal" filter test:
5550 (1) The test was buggy in that it was just doing the equivalent of
5551 "contains" tests on header lines. For example, if a user's address was
5552 anne@some.where, the "personal" test would incorrectly be true for
5554 To: susanne@some.where
5556 This test is now done by extracting each address from the header in turn,
5557 and checking the entire address. Other tests that are part of "personal"
5558 are now done using regular expressions (for example, to check local parts
5559 of addresses in From: header lines).
5561 (2) The list of non-personal local parts in From: addresses has been
5562 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5563 taken from the Sieve specification recommendations.
5565 (3) If the message contains any header line starting with "List-" it is
5566 treated as non-personal.
5568 (4) The test for "circular" in the Subject: header line has been removed
5569 because it now seems ill-conceived.
5571 15. Minor typos in src/EDITME comments corrected.
5573 16. Installed latest exipick from John Jetmore.
5575 17. If headers_add on a router specified a text string that was too long for
5576 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5577 of string_sprintf() is now avoided.
5579 18. $message_body_size was not set (it was always zero) when running the DATA
5580 ACL and the local_scan() function.
5582 19. For the "mail" command in an Exim filter, no default was being set for
5583 the once_repeat time, causing a random time value to be used if "once" was
5584 specified. (If the value happened to be <= 0, no repeat happened.) The
5585 default is now 0s, meaning "never repeat". The "vacation" command was OK
5586 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5587 (I found it when inspecting the code).
5589 20. There is now an overall timeout for performing a callout verification. It
5590 defaults to 4 times the callout timeout, which applies to individual SMTP
5591 commands during the callout. The overall timeout applies when there is more
5592 than one host that can be tried. The timeout is checked before trying the
5593 next host. This prevents very long delays if there are a large number of
5594 hosts and all are timing out (e.g. when the network connections are timing
5595 out). The value of the overall timeout can be changed by specifying an
5596 additional sub-option for "callout", called "maxwait". For example:
5598 verify = sender/callout=5s,maxwait=20s
5600 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5601 to the end before writing, but this should make it even safer).
5603 22. Exim was forgetting that it had advertised PIPELINING for the second and
5604 subsequent messages on an SMTP connection. It was also not resetting its
5605 memory on STARTTLS and an internal HELO.
5607 23. When Exim logs an SMTP synchronization error within a session, it now
5608 records whether PIPELINING has been advertised or not.
5610 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5611 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5612 rather than long int.
5614 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5616 26. Added the never_mail option to autoreply.
5622 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5623 crash if the getsockname() call failed; this can happen if a connection is
5624 closed very soon after it is established. The problem was simply in the
5625 order in which certain operations were done, causing Exim to try to write
5626 to the SMTP stream before it had set up the file descriptor. The bug has
5627 been fixed by making things happen in the correct order.
5633 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5634 before the connection was closed, thus losing the rejection response.
5636 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5637 some early Solaris releases, but causes trouble in current releases where
5638 socklen_t is defined.
5640 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5643 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5646 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5647 that releasing the top of it at the end releases what was used for sub-
5648 expansions (unless the block got too big). However, discard this block if
5649 the first thing is a variable or header, so that we can use its block when
5650 it is dynamic (useful for very large $message_headers, for example).
5652 6. Lookups now cache *every* query, not just the most recent. A new, separate
5653 store pool is used for this. It can be recovered when all lookup caches are
5654 flushed. Lookups now release memory at the end of their result strings.
5655 This has involved some general refactoring of the lookup sources.
5657 7. Some code has been added to the store_xxx() functions to reduce the amount
5658 of flapping under certain conditions.
5660 8. log_incoming_interface used to affect only the <= reception log lines. Now
5661 it causes the local interface and port to be added to several more SMTP log
5662 lines, for example "SMTP connection from", and rejection lines.
5664 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5666 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5668 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5669 could be overwritten at the end of the current message (or the start of a
5670 new message if it was set in a HELO ACL). The value is now preserved for
5671 the duration of the SMTP connection.
5673 12. If a transport had a headers_rewrite setting, and a matching header line
5674 contained an unqualified address, that address was qualified, even if it
5675 did not match any rewriting rules. The underlying bug was that the values
5676 of the flags that permit the existence of unqualified sender and recipient
5677 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5678 non-local messages, and by -bnq for local messages) were not being
5679 preserved with the message after it was received.
5681 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5682 "next input=" as part of the text comprising the host identity instead of
5683 the correct text. The code was using the same buffer for two different
5684 strings. However, depending on which order the printing function evaluated
5685 its arguments, the bug did not always show up. Under Linux, for example, my
5686 test suite worked just fine.
5688 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5689 doesn't work with some older versions of Perl. It has been changed to "my",
5690 which in any case is probably the better facility to use.
5692 15. A really picky compiler found some instances of statements for creating
5693 error messages that either had too many or two few arguments for the format
5696 16. The size of the buffer for calls to the DNS resolver has been increased
5697 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5698 for addresses that have a lot of PTR records. This alleviates a problem; it
5699 does not fully solve it.
5701 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5702 buffer now truncates the list and logs the incident, which is the same
5703 action as happens when Exim is looking up a host name and its aliases.
5704 Previously in this situation something unpredictable would happen;
5705 sometimes it was "internal error: store_reset failed".
5707 18. If a server dropped the connection unexpectedly when an Exim client was
5708 using GnuTLS and trying to read a response, the client delivery process
5709 crashed while trying to generate an error log message.
5711 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5712 string, for example:
5714 warn message = H1: something\nH2: something
5716 the text was added as a single header line from Exim's point of view
5717 though it ended up OK in the delivered message. However, searching for the
5718 second and subsequent header lines using $h_h2: did not work. This has been
5719 fixed. Similarly, if a system filter added multiple headers in this way,
5720 the routers could not see them.
5722 20. Expanded the error message when iplsearch is called with an invalid key to
5723 suggest using net-iplsearch in a host list.
5725 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5726 ACLs are no longer actually imposed (and a message to that effect is
5729 22. If a "gecos" field in a passwd entry contained escaped characters, in
5730 particular, if it contained a \" sequence, Exim got it wrong when building
5731 a From: or a Sender: header from that name. A second bug also caused
5732 incorrect handling when an unquoted " was present following a character
5733 that needed quoting.
5735 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5736 was not being matched caselessly.
5738 24. Arranged for all hyphens in the exim.8 source to be escaped with
5741 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5742 properly. Recipient callout cache records were still being keyed to include
5743 the sender, even when use_sender was set false. This led to far more
5744 callouts that were necessary. The sender is no longer included in the key
5745 when use_sender is false.
5747 26. Added "control = submission" modifier to ACLs.
5749 27. Added the ${base62d: operator to decode base 62 numbers.
5751 28. dnsdb lookups can now access SRV records.
5753 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5754 the configuration file.
5756 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5757 (-v) mode. This makes the output for a verbose queue run more intelligible.
5759 31. Added a use_postmaster feature to recipient callouts.
5761 32. Added the $body_zerocount variable, containing the number of binary zero
5762 bytes in the message body.
5764 33. The time of last modification of the "new" subdirectory is now used as the
5765 "mailbox time last read" when there is a quota error for a maildir
5768 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5770 35. Added +ignore_unknown as a special item in host lists.
5772 36. Code for decoding IPv6 addresses in host lists is now included, even if
5773 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5774 address was recognized as an IP address, but was then not correctly decoded
5775 into binary, causing unexpected and incorrect effects when compared with
5782 1. Very minor rewording of debugging text in manualroute to say "list of
5783 hosts" instead of "hostlist".
5785 2. If verify=header_syntax was set, and a header line with an unqualified
5786 address (no domain) and a large number of spaces between the end of the
5787 name and the colon was received, the reception process suffered a buffer
5788 overflow, and (when I tested it) crashed. This was caused by some obsolete
5789 code that should have been removed. The fix is to remove it!
5791 3. When running in the test harness, delay a bit after writing a bounce
5792 message to get a bit more predictability in the log output.
5794 4. Added a call to search_tidyup() just before forking a reception process. In
5795 theory, someone could use a lookup in the expansion of smtp_accept_max_
5796 per_host which, without the tidyup, could leave open a database connection.
5798 5. Added the variables $recipient_data and $sender_data which get set from a
5799 lookup success in an ACL "recipients" or "senders" condition, or a router
5800 "senders" option, similar to $domain_data and $local_part_data.
5802 6. Moved the writing of debug_print from before to after the "senders" test
5805 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5806 problems for message scanning, either using a data ACL, or using
5807 local_scan() because the Received: header was not generated till after they
5808 were called (in order to set the time as the time of reception completion).
5809 I have revised the way this works. The header is now generated after the
5810 body is received, but before the ACL or local_scan() are called. After they
5811 are run, the timestamp in the header is updated.
5817 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5818 before starting a queue runner without re-exec. This happened only when
5819 deliver_drop_privilege was set or when the Exim user was set to root. The
5820 effect of the bug was that timeouts during subsequent deliveries caused
5821 crashes instead of being properly handled. The handler is now left at its
5822 default (and expected) setting.
5824 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5825 message, again when deliver_drop_privilege is set or Exim is run as root.
5826 The bug described in (1) was not present in this case, but the tidying up
5827 of the other signals was missing. I have made the two cases consistent.
5829 3. The ignore_target_hosts setting on a manualroute router was being ignored
5830 for hosts that were looked up using the /MX notation.
5832 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5835 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5836 operated on the sender address. After changing the $sender_address to <>
5837 for the sender address verify, Exim was re-instated it as the original
5838 (before rewriting) address, but remembering that it had rewritten it, so it
5839 wasn't rewriting it again. This bug also had the effect of breaking the
5840 sender address verification caching when the sender address was rewritten.
5842 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5843 This has been changed so that if the ip literal address matches
5844 ignore_target_hosts, the router declines.
5846 7. Added expansion conditions match_domain, match_address, and match_local_
5847 part (NOT match_host).
5849 8. The placeholder for the Received: header didn't have a length field set.
5851 9. Added code to Exim itself and to exim_lock to test for a specific race
5852 condition that could lead to file corruption when using MBX delivery. The
5853 issue is with the lockfile that is created in /tmp. If this file is removed
5854 after a process has opened it but before that process has acquired a lock,
5855 there is the potential for a second process to recreate the file and also
5856 acquire a lock. This could lead to two Exim processes writing to the file
5857 at the same time. The added code performs the same test as UW imapd; it
5858 checks after acquiring the lock that its file descriptor still refers to
5859 the same named file.
5861 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5862 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5865 11. Added the smtp_active_hostname option. If used, this will typically be made
5866 to depend on the incoming interface address. Because $interface_address is
5867 not set up until the daemon has forked a reception process, error responses
5868 that can happen earlier (such as "too many connections") no longer contain
5871 12. If an expansion in a condition on a "warn" statement fails because a lookup
5872 defers, the "warn" statement is abandoned, and the next ACL statement is
5873 processed. Previously this caused the whole ACL to be aborted.
5875 13. Added the iplsearch lookup type.
5877 14. Added ident_timeout as a log selector.
5879 15. Added tls_certificate_verified as a log selector.
5881 16. Added a global option tls_require_ciphers (compare the smtp transport
5882 option of the same name). This controls incoming TLS connections.
5884 17. I finally figured out how to make tls_require_ciphers do a similar thing
5885 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5886 before starting the TLS session.
5888 18. Tabs are now shown as \t in -bP output.
5890 19. If the log selector return_path_on_delivery was set, Exim crashed when
5891 bouncing a message because it had too many Received: header lines.
5893 20. If two routers both had headers_remove settings, and the first one included
5894 a superfluous trailing colon, the final name in the first list and the
5895 first name in the second list were incorrectly joined into one item (with a
5896 colon in the middle).
5902 1. Added -C and -D options to the exinext utility, mainly to make it easier
5903 to include in the automated testing, but these could be helpful when
5904 multiple configurations are in use.
5906 2. The exinext utility was not formatting the output nicely when there was
5907 an alternate port involved in the retry record key, nor when there was a
5908 message id as well (for retries that were specific to a specific message
5909 and a specific host). It was also confused by IPv6 addresses, because of
5910 the additional colons they contain. I have fixed the IPv4 problem, and
5911 patched it up to do a reasonable job for IPv6.
5913 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5914 delivery, the log line now contains "pipelined" if PIPELINING was used.
5916 4. An SMTP transport process used to panic and die if the bind() call to set
5917 an explicit outgoing interface failed. This has been changed; it is now
5918 treated in the same way as a connect() failure.
5920 5. A reference to $sender_host_name in the part of a conditional expansion
5921 that was being skipped was still causing a DNS lookup. This no longer
5924 6. The def: expansion condition was not recognizing references to header lines
5925 that used bh_ and bheader_.
5927 7. Added the _cache feature to named lists.
5929 8. The code for checking quota_filecount in the appendfile transport was
5930 allowing one more file than it should have been.
5932 9. For compatibility with Sendmail, the command line option
5940 and sets the incoming protocol and host name (for trusted callers). The
5941 host name and its colon can be omitted when only the protocol is to be set.
5942 Note the Exim already has two private options, -pd and -ps, that refer to
5943 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5944 "s", but I don't think that's a major issue.
5946 10. A number of refactoring changes to the code, none of which should affect
5949 (a) The number of logging options was getting close to filling up the
5950 32-bit word that was used as a bit map. I have split them into two classes:
5951 those that are passed in the argument to log_write(), and those that are
5952 only ever tested independently outside of that function. These are now in
5953 separate 32-bit words, so there is plenty of room for expansion again.
5954 There is no change in the user interface or the logging behaviour.
5956 (b) When building, for example, log lines, the code previously used a
5957 macro that called string_cat() twice, in order to add two strings. This is
5958 not really sufficiently general. Furthermore, there was one instance where
5959 it was actually wrong because one of the argument was used twice, and in
5960 one call a function was used. (As it happened, calling the function twice
5961 did not affect the overall behaviour.) The macro has been replaced by a
5962 function that can join an arbitrary number of extra strings onto a growing
5965 (c) The code for expansion conditions now uses a table and a binary chop
5966 instead of a serial search (which was left over from when there were very
5967 few conditions). Also, it now recognizes conditions like "pam" even when
5968 the relevant support is not compiled in: a suitably worded error message is
5969 given if an attempt is made to use such a condition.
5971 11. Added ${time_interval:xxxxx}.
5973 12. A bug was causing one of the ddress fields not to be passed back correctly
5974 from remote delivery subprocesses. The field in question was not being
5975 subsequently used, so this caused to problems in practice.
5977 13. Added new log selectors queue_time and deliver_time.
5979 14. Might have fixed a bug in maildirsizefile handling that threw up
5980 "unexpected character" debug warnings, and recalculated the data
5981 unnecessarily. In any case, I expanded the warning message to give more
5984 15. Added the message "Restricted characters in address" to the statements in
5985 the default ACL that block characters like @ and % in local parts.
5987 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5988 Three changes have been made:
5990 (a) There was a serious bug; a negative response to MAIL caused the whole
5991 recipient domain to be cached as invalid, thereby blocking all messages
5992 to all local parts at the same domain, from all senders. This bug has
5993 been fixed. The domain is no longer cached after a negative response to
5994 MAIL if the sender used is not empty.
5996 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5999 (c) A new callout option, "use_sender" has been added for people who want
6000 the modified behaviour.
6006 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6009 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6010 indeed breaks things for older releases.
6012 3. Added additional logging to the case where there is a problem reading data
6013 from a filter that is running in a subprocess using a pipe, in order to
6014 try to track down a specific problem.
6016 4. Testing facility fudge: when running in the test harness and attempting
6017 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6018 getting "No route to host". Convert this to a timeout.
6020 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6023 6. Some OS don't have socklen_t but use size_t instead. This affects the
6024 fifth argument of getsockopt() amongst other things. This is now
6025 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6026 can be set for individual OS. I have set it for SunOS5, OSF1, and
6027 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6028 some earlier ones do not.
6030 7. Change 4.30/15 was not doing the test caselessly.
6032 8. The standard form for an IPv6 address literal was being rejected by address
6033 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6034 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6035 this, as well as the form without the "IPv6" on the front (but only when
6036 address literals are enabled, of course).
6038 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6040 10. Exim crashed if a message with an empty sender address specified by -f
6041 encountered a router with an errors_to setting. This could be provoked only
6042 by a command such as
6046 where an empty string was supplied; "<>" did not hit this bug.
6048 11. Installed PCRE release 4.5.
6050 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6051 remained set. It is now erased.
6053 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6054 times from message ids (which are base 36 rather than the normal 62).
6056 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6057 were being counted as actual protocol errors, and logged if the log
6058 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6059 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6060 and DATA following a set of rejected RCPTs do not count as protocol errors.
6061 In other words, Exim assumes they were pipelined, though this may not
6062 actually be the case. Of course, in all cases the client gets an
6063 appropriate error code.
6065 15. If a lookup fails in an ACL condition, a message about the failure may
6066 be available; it is used if testing the ACL cannot continue, because most
6067 such messages specify what the cause of the deferral is. However, some
6068 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6069 that caused an old message to be retained and used if a later statement
6070 caused a defer, replacing the real cause of the deferral.
6072 16. If an IP address had so many PTR records that the DNS lookup buffer
6073 was not large enough to hold them, Exim could crash while trying to process
6074 the truncated data. It now detects and logs this case.
6076 17. Further to 4.21/58, another change has been made: if (and only if) the
6077 first line of a message (the first header line) ends with CRLF, a bare LF
6078 in a subsequent header line has a space inserted after it, so as not to
6079 terminate the header.
6081 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6082 unnecessarily, used atoi() instead of strtol(), and didn't check the
6083 termination when getting file sizes from file names by regex.
6085 19. Completely re-implemented the support for maildirsize files, in the light
6086 of a number of problems with the previous contributed implementation
6087 (4.30/29). In particular:
6089 . If the quota is zero, the maildirsize file is maintained, but no quota is
6092 . If the maildir directory does not exist, it is created before any attempt
6093 to write a maildirsize file.
6095 . The quota value in the file is just a cache; if the quota is changed in
6096 the transport, the new value overrides.
6098 . A regular expression is available for excluding directories from the
6101 20. The autoreply transport checks the characters in options that define the
6102 message's headers; it allows continued headers, but it was checking with
6103 isspace() after an embedded newline instead of explicitly looking for a
6106 21. If all the "regular" hosts to which an address was routed had passed their
6107 expiry times, and had not reached their retry times, the address was
6108 bounced, even if fallback hosts were defined. Now Exim should go on to try
6111 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6112 equivalent code in the SMTP transport. Some hosts send humungous responses
6113 to HELO/EHLO, more than 1024 it seems.
6115 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6116 gives compiler warnings in some environments. I've now done it "properly",
6119 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6120 (because of problems with the built-in one) was declared to return uschar *
6121 instead of char *, causing compiler failure.
6123 25. Fixed a file descriptor leak when processing alias/forward files.
6125 26. Fixed a minor format string issue in dbfn.c.
6127 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6129 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6130 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6133 29. When a sender address is verified, it is cached, to save repeating the test
6134 when there is more than one recipient in a message. However, when the
6135 verification involves a callout, it is possible for different callout
6136 options to be set for different recipients. It is too complicated to keep
6137 track of this in the cache, so now Exim always runs a verification when a
6138 callout is required, relying on the callout cache for the optimization.
6139 The overhead is duplication of the address routing, but this should not be
6142 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6143 to be verified with callout=postmaster, and the main callout worked but the
6144 postmaster check failed, the verification correctly failed. However, if a
6145 subsequent RCPT command asked for sender verification *without* the
6146 postmaster check, incorrect caching caused this verification also to fail,
6149 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6150 it was not caching the DNS options (qualify_single, search_parents) that
6151 were used when the lookup failed. A subsequent lookup with different
6152 options therefore always gave the same answer, though there were cases
6153 where it should not have. (Example: a "domains = !$mx_any" option on a
6154 dnslookup router: the "domains" option is always processed without any
6155 widening, but the router might have qualify_single set.) Now Exim uses the
6156 cached value only when the same options are set.
6158 32. Added John Jetmore's "exipick" utility to the distribution.
6160 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6161 than a timeout (e.g. a certificate is required, and is not provided), an
6162 Exim server now closes the connection immediately. Previously it waited for
6163 the client to close - but if the client is SSL, it seems that they each
6164 wait for each other, leading to a delay before one of them times out.
6166 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6167 maintained 0.8.x compatibility because I don't think many are using it, and
6168 it is clearly obsolete.
6170 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6173 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6174 client certificate was expired. A simple patch fixes this, though I don't
6175 understand the full logic of why the verify callback is called multiple
6178 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6179 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6180 which causes problems with some clients (such as the Certicom SSL Plus
6181 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6182 disables the coutermeasure allowing Eudora to connect."
6184 38. Exim was not checking that a write() to a log file succeeded. This could
6185 lead to Bad Things if a log got too big, in particular if it hit a file
6186 size limit. Exim now panics and dies if it cannot write to a log file, just
6187 as it does if it cannot open a log file.
6189 39. Modified OS/Makefile-Linux so that it now contains
6191 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6193 The two -D definitions ensure that Exim is compiled with large file
6194 support, which makes it possible to handle log files that are bigger than
6197 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6198 instance) a domain was checked against a named list that involved a lookup,
6199 causing $domain_data to be set, then another domain was checked against the
6200 same list, then the first domain was re-checked, the value of $domain_data
6201 after the final check could be wrong. In particular, if the second check
6202 failed, it could be set empty. This bug probably also applied to
6205 41. The strip_trailing_dot option was not being applied to the address given
6206 with the -f command-line option.
6208 42. The code for reading a message's header from the spool was incrementing
6209 $received_count, but never initializing it. This meant that the value was
6210 incorrect (doubled) while delivering a message in the same process in which
6211 it was received. In the most common configuration of Exim, this never
6212 happens - a fresh exec is done - but it can happen when
6213 deliver_drop_privilege is set.
6215 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6216 it now includes up to 150 characters of the unexpected data in the log
6219 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6220 and building data strings. The size of both of these buffers was 10 000
6221 bytes - far larger than anybody would *ever* want, thought I. Needless to
6222 say, somebody hit the limit. I have increased the maximum line length to
6223 20 000 and the maximum data length of concatenated lines to 100 000. I have
6224 also fixed two bugs, because there was no checking on these buffers. Tsk,
6225 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6226 buffer is too small.
6228 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6229 lsearch lookups. Now it does.
6231 46. When parsing a route_list item in a manualroute router, a fixed-length
6232 buffer was used for the list of hosts. I made this 1024 bytes long,
6233 thinking that nobody would ever have a list of hosts that long. Wrong.
6234 Somebody had a whole pile of complicated expansion conditions, and the
6235 string was silently truncated, leading to an expansion error. It turns out
6236 that it is easier to change to an unlimited length (owing to other changes
6237 that have happened since this code was originally written) than to build
6238 structure for giving a limitation error. The length of the item that
6239 expands into the list of hosts is now unlimited.
6241 47. The lsearch lookup could not handle data where the length of text line was
6242 more than 4095 characters. Such lines were truncated, leading to shortened
6243 data being returned. It should now handle lines of any length.
6245 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6246 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6249 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6250 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6251 no longer happens in comment lines. A list of replacements is now placed
6252 at the head of all of the source files, except those whose only change is
6253 to replace PERL_COMMAND in the very first #! line.
6255 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6256 messages on the queue, with a bottom-up merge sort, using code contributed
6257 by Michael Haardt. This should make operations like -bp somewhat faster on
6258 large queues. It won't affect queue runners, except when queue_run_in_order
6261 51. Installed eximstats 1.31 in the distribution.
6263 52. Added support for SRV lookups to the dnslookup router.
6265 53. If an ACL referred to $message_body or $message_body_end, the value was not
6266 reset for any messages that followed in the same SMTP session.
6268 54. The store-handling optimization for building very long strings was not
6269 differentiating between the different store pools. I don't think this
6270 actually made any difference in practice, but I've tidied it.
6272 55. While running the routers to verify a sender address, $sender_address
6273 was still set to the sender address. This is wrong, because when routing to
6274 send a bounce to the sender, it would be empty. Therefore, I have changed
6275 it so that, while verifying a sender address, $sender_address is set to <>.
6276 (There is no change to what happens when verifying a recipient address.)
6278 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6279 target A or AAAA records (if not already returned) without resetting the
6280 qualify_single or search_parents options of the DNS resolver. These are
6281 inappropriate in this case because the targets of MX and SRV records must
6282 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6283 target that, when qualified, matched something in the local domain. These
6284 two options are now turned off when doing these lookups.
6286 57. It seems that at least some releases of Reiserfs (which does not have the
6287 concept of a fixed number of inodes) returns zero and not -1 for the
6288 number of available inodes. This interacted badly with check_spool_inodes,
6289 which assumed that -1 was the "no such thing" setting. What I have done is
6290 to check that the total number of inodes is greater than zero before doing
6291 the test of how many are available.
6293 58. When a "warn" ACL statement has a log_message modifier, the message is
6294 remembered, and not repeated. This is to avoid a lot of repetition when a
6295 message has many recipients that cause the same warning to be written.
6296 However, Exim was preserving the list of already written lines for an
6297 entire SMTP session, which doesn't seem right. The memory is now reset if a
6298 new message is started.
6300 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6301 debugging output unless log_rewrite was also set.
6303 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6304 of (int)(handle) when we know that handle contains (void *)(-1).
6306 61. The Exim daemon panic-logs an error return when it closes the incoming
6307 connection. However "connection reset by peer" seems to be common, and
6308 isn't really an error worthy of noting specially, so that particular error
6311 62. When Exim is trying to find all the local interfaces, it used to panic and
6312 die if the ioctl to get the interface flags failed. However, it seems that
6313 on at least one OS (Solaris 9) it is possible to have an interface that is
6314 included in the list of interfaces, but for which you get a failure error
6315 for this call. This happens when the interface is not "plumbed" into a
6316 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6317 failure of the "get flags" call assumes that the interface is down.
6319 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6320 makes life easier for people who are doing arithmetic on fields extracted
6321 from dates, where you often get leading zeros that should not be
6322 interpreted as octal.
6324 64. Added qualify_domain to the redirect router, to override the global
6327 65. If a pathologically long header line contained very many addresses (the
6328 report of this problem mentioned 10 000) and each of them was rewritten,
6329 Exim could use up a very large amount of memory. (It kept on making new
6330 copies of the header line as it rewrote, and never released the old ones.)
6331 At the expense of a bit more processing, the header rewriting function has
6332 been changed so that it no longer eats memory in this way.
6334 66. The generation of the Received: header has been moved from the time that a
6335 message starts to be received, to the time that it finishes. The timestamp
6336 in the Received: header should now be very close to that of the <= log
6337 line. There are two side-effects of this change:
6339 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6340 logged header lines no longer include the local Received: line, because
6341 it has not yet been created. The same applies to a copy of the message
6342 that is returned to a non-SMTP sender when a message is rejected.
6344 (b) When a filter file is tested using -bf, no additional Received: header
6345 is added to the test message. After some thought, I decided that this
6348 This change does not affect the value of $received_for. It is still set
6349 after address rewriting, but before local_scan() is called.
6351 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6353 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6354 gave an unhelpful panic error message, and a defer error. I have managed to
6355 change this behaviour so that it now rejects any supplied certificate,
6356 which seems right, as the list of acceptable certificates is empty.
6358 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6359 gave an unhelpful defer error. I have not managed to make this reject any
6360 supplied certificates, but the error message it gives is "no certificate
6361 supplied", which is not helpful.
6363 70. exigrep's output now also includes lines that are not associated with any
6364 message, but which match the given pattern. Implemented by a patch from
6365 Martin Sluka, which also tidied up the Perl a bit.
6367 71. Recipient callout verification, like sender verification, was using <> in
6368 the MAIL FROM command. This isn't really the right thing, since the actual
6369 sender may affect whether the remote host accepts the recipient or not. I
6370 have changed it to use the actual sender in the callout; this means that
6371 the cache record is now keyed on a recipient/sender pair, not just the
6372 recipient address. There doesn't seem to be a real danger of callout loops,
6373 since a callout by the remote host to check the sender would use <>.
6374 [SEE ABOVE: changed after hitting problems.]
6376 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6377 temporary errors. However, in the case of such a code being given after
6378 the end of a data transmission (i.e. after ".") Exim was failing to write
6379 a retry record for the message. (Yes, there was some broken host that was
6380 actually sending 8xx at this point.)
6382 73. An unknown lookup type in a host list could cause Exim to panic-die when
6383 the list was checked. (An example that provoked this was putting <; in the
6384 middle of a list instead of at the start.) If this happened during a DATA
6385 ACL check, a -D file could be left lying around. This kind of configuration
6386 error no longer causes Exim to die; instead it causes a defer error. The
6387 incident is still logged to the main and panic logs.
6389 74. Buglet left over from Exim 3 conversion. The message "too many messages
6390 in one connection" was written to the rejectlog but not the mainlog, except
6391 when address rewriting (yes!) was being logged.
6393 75. Added write_rejectlog option.
6395 76. When a system filter was run not as root (that is, when system_filter_user
6396 was set), the values of the $n variables were not being returned to the
6397 main process; thus, they were not subsequently available in the $sn
6400 77. Added +return_path_on_delivery log selector.
6402 78. A connection timeout was being treated differently from recipients deferred
6403 when testing hosts_max_try with a message that was older than the host's
6404 retry timeout. (The host should not be counted, thus allowing all hosts to
6405 be tried at least once before bouncing.) This may have been the cause of an
6406 occasionally reported bug whereby a message would remain on the queue
6407 longer than the retry timeout, but would be bounced if a delivery was
6408 forced. I say "may" because I never totally pinned down the problem;
6409 setting up timeout/retry tests is difficult. See also the next item.
6411 79. The ultimate address timeout was not being applied to errors that involved
6412 a combination of host plus message (for example, a timeout on a MAIL
6413 command). When an address resolved to a number of possible hosts, and they
6414 were not all tried for each delivery (e.g. because of hosts_max_try), a
6415 message could remain on the queue longer than the retry timeout.
6417 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6420 81. Fixed an obscure SMTP outgoing bug which required at least the following
6421 conditions: (a) there was another message waiting for the same server;
6422 (b) the server returned 5xx to all RCPT commands in the first message so
6423 that the message was not completed; (c) the server dropped the connection
6424 or gave a negative response to the RSET that Exim sends to abort the
6425 transaction. The observed case was a dropped connection after DATA that had
6426 been sent in pipelining mode. That is, the server had advertised PIPELINING
6427 but was not implementing it correctly. The effect of the bug was incorrect
6428 behaviour, such as trying another host, and this could lead to a crash.
6434 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6435 and daemon.c were passed as pointers to ints; they should have been
6436 pointers to socklen_t variables (which are typically unsigned ints).
6438 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6441 3. Fixed a really odd bug that affected only the testing scheme; patching a
6442 certain fixed string in the binary changed the value of another string that
6443 happened to be identical to the end of the original first string.
6445 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6446 name", it returns that address as the IP address. On some operating
6447 systems (e.g. Solaris), it also passes back the IP address string as the
6448 "host name". However, on others (e.g. Linux), it passes back an empty
6449 string. Exim wasn't checking for this, and was changing the host name to an
6450 empty string, assuming it had been canonicalized.
6452 5. Although rare, it is permitted to have more than one PTR record for a given
6453 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6454 all the names associated with an address, because they do in Solaris.
6455 However, it seems that they do not in Linux for data that comes from the
6456 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6457 I found this out when I moved to a new Linux workstation and tried to run
6458 the Exim test suite.
6460 To get round this problem I have changed the code so that it now does its
6461 own call to the DNS to look up PTR records when searching for a host name.
6462 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6463 addresses that are only in /etc/hosts are still found.
6465 This behaviour is, however, controlled by an option called host_lookup_
6466 order, which defaults to "bydns:byaddr". If people want to use the other
6467 order, or indeed, just use one or the other means of lookup, they can
6468 specify it in this variable.
6470 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6471 some operating systems, this comes back from gethostbyaddr() as an empty
6472 string, and this is what Exim used to test for. However, it seems that in
6473 other systems, "." is yielded. Exim now tests for this case too.
6475 7. The values of check_spool_space and check_log_space are now held internally
6476 as a number of kilobytes instead of an absolute number of bytes. If a
6477 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6478 kilobyte. This means that much larger values can be stored.
6480 8. Exim monitor: an attempt to get the action menu when not actually pointing
6481 at a message produces an empty menu entitled "No message selected". This
6482 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6483 no entries in it ("Shell widget menu has zero width and/or height"). So I
6484 have added a single, blank menu entry in this case.
6486 9. Added ${quote_local_part.
6488 10. MIME decoding is now applied to the contents of Subject: header lines when
6491 11. Now that a reference to $sender_host_address automatically causes a reverse
6492 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6493 host lookup before query-style lookups in lists that might use this
6494 variable. This has therefore been abolished, and the "net-" prefix is no
6495 longer necessary for query-style lookups.
6497 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6498 have been a typo for LFLAGS, so it has been changed.
6500 13. The install script calls Exim with "-C /dev/null" in order to find the
6501 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6502 to be output. However, since Exim outputs its version number before the
6503 error, it didn't break the script. It just looked ugly. I fixed this by
6504 always allowing "-C /dev/null" if the caller is root.
6506 14. Ignore overlarge ACL variable number when reading spool file - insurance
6507 against a later release with more variables having written the file.
6509 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6510 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6511 this, as well as the form without the "IPv6" on the front.
6513 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6514 OS/Makefile-Darwin file.
6516 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6517 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6519 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6520 variable. However, some OS use ints for inodes. I've added cast to long int
6521 to get rid of the compiler warning.
6523 19. I had forgotten to lock out "/../" in configuration file names when
6524 ALT_CONFIG_PREFIX was set.
6526 20. Routers used for verification do not need to specify transports. However,
6527 if such a router generated a host list, and callout was configured, Exim
6528 crashed, because it could not find a port number from the (non-existent)
6529 transport. It now assumes port 25 in this circumstance.
6531 21. Added the -t option to exigrep.
6533 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6534 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6535 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6536 them is set, LOOKUP_LSEARCH is forced.
6538 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6540 24. Added sender and host information to the "rejected by local_scan()" log
6541 line; previously there was no indication of these.
6543 25. Added .include_if_exists.
6545 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6546 Linux. It turns out that not all file systems support this. Apparently some
6547 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6548 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6549 not supported on the file descriptor, is now ignored when Exim is trying to
6550 sync a directory. This applies only to Linux.
6552 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6554 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6555 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6558 29. Added support for maildirsize files from supplied patch (modified a bit).
6560 30. The use of :fail: followed by an empty string could lead Exim to respond to
6561 sender verification failures with (e.g.):
6563 550 Verification failed for <xxx>
6564 550 Sender verify failed
6566 where the first response line was missing the '-' that indicates it is not
6567 the final line of the response.
6569 31. The loop for finding the name of the user that called Exim had a hardwired
6570 limit of 10; it now uses the value of finduser_retries, which is used for
6571 all other user lookups.
6573 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6576 33. Exim was neglecting to zero errno before one call of strtol() when
6577 expanding a string and expecting an integer value. On some systems this
6578 resulted in spurious "integer overflow" errors. Also, it was casting the
6579 result into an int without checking.
6581 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6582 did not work. The code looks as if it has *never* worked, though it appears
6583 to have been documented since at least release 1.62. I have made it work.
6585 35. The "timeout_DNS" error in retry rules, also documented since at least
6586 1.62, also never worked. As it isn't clear exactly what this means, and
6587 clearly it isn't a major issue, I have abolished the feature by treating it
6588 as "timeout", and writing a warning to the main and panic logs.
6590 36. The display of retry rules for -brt wasn't always showing the error code
6593 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6594 timeout_connect_A, timeout_connect_MX.
6596 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6597 to the empty sender.
6599 39. The daemon was not analysing the content of -oX till after it had closed
6600 stderr and disconnected from the controlling terminal. This meant that any
6601 syntax errors were only noted on the panic log, and the return code from
6602 the command was 0. By re-arranging the code a little, I've made the
6603 decoding happen first, so such errors now appear on stderr, and the return
6604 code is 1. However, the actual setting up of the sockets still happens in
6605 the disconnected process, so errors there are still only recorded on the
6608 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6609 connections (as happens on some IP stacks) was logged at start up time as
6610 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6611 it from "IPv6 and IPv4", which means that two separate sockets are being
6614 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6615 says whether AF_INET or AF_INET6 was passed as an argument.
6617 42. Exiwhat output was messed up when time zones were included in log
6620 43. Exiwhat now gives more information about the daemon's listening ports,
6621 and whether -tls-on-connect was used.
6623 44. The "port" option of the smtp transport is now expanded.
6625 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6626 silently ignored. Now an error message is written to the main and panic
6629 46. There's a new ACL modifier called "logwrite" which writes to a log file
6630 as soon as it is encountered.
6632 47. Added $local_user_uid and $local_user_gid at routing time.
6634 48. Exim crashed when trying to verify a sender address that was being
6637 49. Exim was recognizing only a space character after ".include". It now also
6638 recognizes a tab character.
6640 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6641 extracting the relevant information from the specification. The man page no
6642 longer contains scrambled data for the -d option, and I've added a section
6643 at the front about calling Exim under different names.
6645 51. Added "extra_headers" argument to the "mail" command in filter files.
6647 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6650 53. Installed eximstats 1.29.
6652 54. Added transport_filter_timeout as a generic transport option.
6654 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6655 Cc: header lines. This was required by RFC 822, but it not required by RFC
6658 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6659 incoming messages that did not have them. Now it does so only if the
6660 message originates locally, that is, if there is no associated remote host
6661 address. When Resent- header lines are present, this applies to the Resent-
6662 lines rather than the non-Resent- lines.
6664 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6665 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6667 58. Messages for configuration errors now include the name of the main
6668 configuration file - useful now that there may be more than one file in a
6669 list (.included file names were always shown).
6671 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6672 for those rare installations that do not start the daemon as root or run it
6673 setuid root. I've cut out the call to initgroups() if the daemon is not
6676 60. The Exim user and group can now be bound into the binary as text strings
6677 that are looked up at the start of Exim's processing.
6679 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6681 62. Added $mailstore_basename variable.
6683 63. Installed patch to sieve.c from Michael Haardt.
6685 64. When Exim failed to open the panic log after failing to open the main log,
6686 the original message it was trying to log was written to stderr and debug
6687 output, but if they were not available (the usual case in production), it
6688 was lost. Now it is written to syslog before the two lines that record the
6689 failures to open the logs.
6691 65. Users' Exim filters run in subprocesses under the user's uid. It is
6692 possible for a "deliver" command or an alias in a "personal" command to
6693 provoke an address rewrite. If logging of address rewriting is configured,
6694 this fails because the process is not running as root or exim. There may be
6695 a better way of dealing with this, but for the moment (because 4.30 needs
6696 to be released), I have disabled address rewrite logging when running a
6697 filter in a non-root, non-exim process.
6703 1. The buildconfig auxiliary program wasn't quoting the value set for
6704 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6705 not defined. This bug was masked in 4.22 by the effect that was fixed in
6708 2. Some messages that were rejected after a message id was allocated were
6709 shown as "incomplete" by exigrep. It no longer does this for messages that
6710 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6712 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6713 have allow_domain_literals set, the ID did not get logged in the <= line.
6714 Domain literals are now always recognized in Message-ID: header lines.
6716 4. The first argument for a ${extract expansion item is the key name or field
6717 number. Leading and trailing spaces in this item were not being ignored,
6718 causing some misleading effects.
6720 5. When deliver_drop_privilege was set, single queue runner processes started
6721 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6722 same command in the process it spins off) were not dropping privilege.
6724 6. When the daemon running as "exim" started a queue runner, it always
6725 re-executed Exim in the spun-off process. This is a waste of effort when
6726 deliver_drop_privilege is set. The new process now just calls the
6727 queue-runner function directly.
6733 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6736 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6737 ignored. Though the use of -oP was forcing the writing of a pid file, it
6738 was always written to the default place.
6740 3. If the message "no IP address found for host xxxx" is generated during
6741 incoming verification, it is now followed by identification of the incoming
6742 connection (so you can more easily find what provoked it).
6744 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6746 5. Added some features to "harden" Exim a bit more against certain attacks:
6748 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6749 be put in Local/Makefile. This is like the never_users runtime option,
6750 but it cannot be overridden. The default setting is "root".
6752 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6753 prefix string with which any file named in a -C command line option
6756 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6757 is retained for -C and -D only if the caller of Exim is root. Without
6758 it, the exim user may also use -C and -D and retain privilege.
6760 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6761 command line option is disabled.
6763 6. Macro names set by the -D option must start with an upper case letter, just
6764 like macro names defined in the configuration file.
6766 7. Added "dereference=" facility to LDAP.
6768 8. Two instances of the typo "uknown" in the source files are fixed.
6770 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6771 the Configure-Makefile script screwed up while processing it.
6773 10. Incorporated PCRE 4.4.
6775 11. The SMTP synchronization check was not operating right at the start of an
6776 SMTP session. For example, it could not catch a HELO sent before the client
6777 waited for the greeting. There is now a check for outstanding input at the
6778 point when the greeting is written. Because of the duplex, asynchronous
6779 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6780 way, but not yet received, when the check is performed.
6782 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6783 on TCP/IP sockets, because this apparently causes some broken clients to
6786 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6787 unchanged) from the Cygwin maintainer.
6789 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6790 was supported instead of testing for mbx. Effectively a typo.
6792 15. The spa authenticator server code was not checking that the input it
6793 received was valid base64.
6795 16. The debug output line for the "set" modifier in ACLs was not showing the
6796 name of the variable that was being set.
6798 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6800 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6801 lookup on its own. Something else was needed to trigger the lookup. For
6802 example, a match in host_lookup or the need for a host name in a host list.
6803 Now, if $sender_host_name is referenced and the host name has not yet been
6804 looked up, a lookup is performed. If the lookup fails, the variable remains
6805 empty, and $host_lookup_failed is set to "1".
6807 19. Added "eqi" as a case-independent comparison operator.
6809 20. The saslauthd authentication condition could segfault if neither service
6810 nor realm was specified.
6812 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6813 error message that was logged was misleading, and incoming SMTP
6814 connections were dropped. The message is now more accurate, and temporary
6815 errors are given to SMTP connections.
6817 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6818 (except RSET) with a 421 error, until QUIT is received. However, it was
6819 failing to send a response to QUIT.
6821 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6822 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6823 ACL is now run after the helo_try_verify_hosts code.
6825 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6826 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6827 case-independent, so other case variants are also recognized). Apparently
6828 some systems use these upper case variants.
6830 25. If more than two messages were waiting for the same host, and a transport
6831 filter was specified for the transport, Exim sent two messages over the
6832 same TCP/IP connection, and then failed with "socket operation on non-
6833 socket" when it tried to send the third.
6835 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6837 27. The extern definition of crypt16() in expand.c was not being excluded when
6838 the OS had its own crypt16() function.
6840 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6841 as a preferred synonym for return_size_limit, both as an option and as an
6844 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6846 30. Changed the default configuration ACL to relax the local part checking rule
6847 for addresses that are not in any local domains. For these addresses,
6848 slashes and pipe symbols are allowed within local parts, but the sequence
6849 /../ is explicitly forbidden.
6851 31. SPA server authentication was not clearing the challenge buffer before
6854 32. log_message in a "warn" ACL statement was writing to the reject log as
6855 well as to the main log, which contradicts the documentation and doesn't
6856 seem right (because no rejection is happening). So I have stopped it.
6858 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6859 However, I am unable to do any testing of this.
6861 34. Fixed an infelicity in the appendfile transport. When checking directories
6862 for a mailbox, to see if any needed to be created, it was accidentally
6863 using path names with one or more superfluous leading slashes; tracing
6864 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6866 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6867 contents are added to the log line that is written for every discarded
6868 recipient. (Previously a log_message setting was ignored.)
6870 36. The ${quote: operator now quotes the string if it is empty.
6872 37. The install script runs exim in order to find its version number. If for
6873 some reason other than non-existence or emptiness, which it checks, it
6874 could not run './exim', it was installing it with an empty version number,
6875 i.e. as "exim-". This error state is now caught, and the installation is
6878 38. An argument was missing from the function that creates an error message
6879 when Exim fails to connect to the socket for saslauthd authentication.
6880 This could cause Exim to crash, or give a corrupted message.
6882 39. Added isip, isip4, and isip6 to ${if conditions.
6884 40. The ACL variables $acl_xx are now saved with the message, and can be
6885 accessed later in routers, transports, and filters.
6887 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6888 strings in the file are not string-expanded.
6890 42. If a MAIL command specified a SIZE value that was too large to fit into an
6891 int variable, the check against message_size_limit failed. Such values are
6892 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6893 day this will have to be increased, but I don't think I want to be around
6894 when emails are that large.
6901 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6902 iconv() is not standard in FreeBSD.
6904 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6905 IPv6 enabled. The observed symptom was a segmentation fault on return from
6906 the function os_common_find_running_interfaces() in src/os.c.
6908 3. In the check_special_case() function in daemon.c I had used "errno" as an
6909 argument name, which causes warnings on some systems. This was basically a
6910 typo, since it was named "eno" in the comments!
6912 4. The code that waits for the clock to tick (at a resolution of some fraction
6913 of a second) so as to ensure message-id uniqueness was always waiting for
6914 at least one whole tick, when it could have waited for less. [This is
6915 almost certainly not relevant at current processor speeds, where it is
6916 unlikely to ever wait at all. But we try to future-proof.]
6918 5. The function that sleeps for a time interval that includes fractions of a
6919 second contained a race. It did not block SIGALRM between setting the
6920 timer, and suspending (a couple of lines later). If the interval was short
6921 and the sigsuspend() was delayed until after it had expired, the suspension
6922 never ended. On busy systems this could lead to processes getting stuck for
6925 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6926 process, before it forks any delivery processes. The open lookup caching
6927 mechanism meant that the open file or database connection was passed into
6928 the delivery process. The problem was that delivery processes always tidy
6929 up cached lookup data. This could cause a problem for the next delivery
6930 process started by the queue runner, because the external queue runner
6931 process does not know about the closure. So the next delivery process
6932 still has data in the lookup cache. In the case of a file lookup, there was
6933 no problem because closing a file descriptor in a subprocess doesn't affect
6934 the parent. However, if the lookup was caching a connection to a database,
6935 the connection was closed, and the second delivery process was likely to
6936 see errors such as "PGSQL: query failed: server closed the connection
6937 unexpectedly". The problem has been fixed by closing all cached lookups
6938 in a queue runner before running a delivery process.
6940 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6941 seem to have the "const" qualifier which it has on other OS. I've
6944 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6945 *of the same type* (client or server) with the same public name that an
6946 error should be diagnosed.
6948 9. When Exim looked up a host name for an IP address, but failed to find the
6949 original IP address when looking up the host name (a safety check), it
6950 output the message "<ip address> does not match any IP for NULL", which was
6951 confusing, to say the least. The bug was that the host name should have
6952 appeared instead of "NULL".
6954 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6955 user that is built into the binary, and the -C or -D options is used, root
6956 privilege is dropped before the configuration file is read. In addition,
6957 logging is switched to stderr instead of the normal log files. If the
6958 configuration then re-defines the Exim user, the unprivileged environment
6959 is probably not what is expected, so Exim logs a panic warning message (but
6962 However, if deliver_drop_privilege is set, the unprivileged state may well
6963 be exactly what is intended, so the warning has been cut out in that case,
6964 and Exim is allowed to try to write to its normal log files.
6970 1. smtp_return_error_details was not giving details for temporary sender
6971 or receiver verification errors.
6973 2. Diagnose a configuration error if two authenticators have the same public
6976 3. Exim used not to create the message log file for a message until the first
6977 delivery attempt. This could be confusing when incoming messages were held
6978 for policy or load reasons. The message log file is now created at the time
6979 the message is received, and an initial "Received" line is written to it.
6981 4. The automatically generated man page for command line options had a minor
6982 bug that caused no ill effects; however, a more serious problem was that
6983 the procedure for building the man page automatically didn't always
6984 operate. Consequently, release 4.20 contains an out-of-date version. This
6985 shouldn't happen again.
6987 5. When building Exim with embedded Perl support, the script that builds the
6988 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6989 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6991 6. The freeze_tell option was not being used for messages that were frozen on
6992 arrival, either by an ACL or by local_scan().
6994 7. Added the smtp_incomplete_transaction log selector.
6996 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6997 was accepting AUTH without a new EHLO.
6999 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7000 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7003 10. Logging of TCP/IP connections (when configured) now happens in the main
7004 daemon process instead of the child process, so that the TCP/IP connection
7005 count is more accurate (but it can never be perfect).
7007 11. The use of "drop" in a nested ACL was not being handled correctly in the
7008 outer ACL. Now, if condition failure induced by the nested "drop" causes
7009 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7010 or "require"), the connection is dropped.
7012 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7013 that yield "discard" can now be used with an "accept" or a "discard" verb,
7014 but an error is generated for any others (because I can't see a useful way
7015 to define what should happen).
7017 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7018 are now processed in the same way as lines in the Exim configuration file.
7019 In particular, continuation lines are supported.
7021 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7023 15. Added -ti meaning -t -i.
7025 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7026 domains, and warn by logging if others are found.
7028 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7029 returned from GIFCONF when Exim is trying to find the list of interfaces on
7030 a host. The code in os.c has been modified to copy each ifreq to an aligned
7031 structure in all cases.
7033 Also, in some cases, the returned ifreq's were being copied to a 'struct
7034 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7035 means the last couple of bytes of an IPv6 address could be chopped if the
7036 ifreq contained only a normal sockaddr (14 bytes storage).
7038 18. Named domain lists were not supported in the hosts_treat_as_local option.
7039 An entry such as +xxxx was not recognized, and was treated as a literal
7042 19. Ensure that header lines added by a DATA ACL are included in the reject log
7043 if the ACL subsequently rejects the message.
7045 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7046 MD5 (which is deprecated).
7048 21. When testing a filter file using -bf, Exim was writing a message when it
7049 took the sender from a "From " line in the message, but it was not doing so
7050 when it took $return_path from a Return-Path: header line. It now does.
7052 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7053 with a valid header line field name (a series of printing characters
7054 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7056 23. Changed "disc" in the source to "disk" to conform to the documentation and
7057 the book and for uniformity.
7059 24. Ignore Sendmail's -Ooption=value command line item.
7061 25. When execve() failed while trying to run a command in a pipe transport,
7062 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7063 could be confused with a return value of 69 from the command itself. This
7064 has been changed to 127, the value the shell returns if it is asked to run
7065 a non-existent command. The wording for the related log line suggests a
7066 non-existent command as the problem.
7068 26. If received_header_text expands to an empty string, do not add a Received:
7069 header line to the message. (Well, it adds a token one on the spool, but
7070 marks it "old" so that it doesn't get used or transmitted.)
7072 27. Installed eximstats 1.28 (addition of -nt option).
7074 28. There was no check for failure on the call to getsockname() in the daemon
7075 code. This can fail if there is a shortage of resources on the system, with
7076 ENOMEM, for example. A temporary error is now given on failure.
7078 29. Contrary to the C standard, it seems that in some environments, the
7079 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7080 program. Exim now does this explicitly; it affects the formatting of
7081 timestamps using strftime().
7083 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7084 complaints. I've now initialized all the variables, to avoid this.
7086 32. Header lines added by a system filter were not being "seen" during
7087 transport-time rewrites.
7089 33. The info_callback() function passed to OpenSSL is set up with type void
7090 (*)(SSL *, int, int), as described somewhere. However, when calling the
7091 function (actually a macro) that sets it up, the type void(*)() is
7092 expected. I've put in a cast to prevent warnings from picky compilers.
7094 34. If a DNS black list lookup found a CNAME record, but there were no A
7095 records associated with the domain it pointed at, Exim crashed.
7097 35. If a DNS black list lookup returned more than one A record, Exim ignored
7098 all but the first. It now scans all returned addresses if a particular IP
7099 value is being sought. In this situation, the contents of the
7100 $dnslist_value variable are a list of all the addresses, separated by a
7103 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7104 to accept a host name and all its aliases if the forward lookup for any of
7105 them yielded the IP address of the incoming connection. Now it accepts only
7106 those names whose forward lookup yields the correct IP address. Any other
7107 names are discarded. This closes a loophole whereby a rogue DNS
7108 administrator could create reverse DNS records to break through a
7109 wildcarded host restriction in an ACL.
7111 37. If a user filter or a system filter that ran in a subprocess used any of
7112 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7113 the wrong values were passed to the pipe command ($thisaddress had the
7114 value of $0, $0 had the value of $1, etc). This bug was introduced by
7115 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7117 38. Improved the line breaking for long SMTP error messages from ACLs.
7118 Previously, if there was no break point between 40 and 75 characters, Exim
7119 left the rest of the message alone. Two changes have been made: (a) I've
7120 reduced the minimum length to 35 characters; (b) if it can't find a break
7121 point between 35 and 75 characters, it looks ahead and uses the first one
7122 that it finds. This may give the occasional overlong line, but at least the
7123 remaining text gets split now.
7125 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7126 file descriptors might be low, and that setting 1000 would always raise it.
7127 It turns out that in some environments, the limit is already over 1000 and
7128 that lowering it causes trouble. So now Exim takes care not to decrease it.
7130 40. When delivering a message, the value of $return_path is set to $sender_
7131 address at the start of routing (routers may change the value). By an
7132 oversight, this default was not being set up when an address was tested by
7133 -bt or -bv, which affected the outcome if any router or filter referred to
7136 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7137 log only when "message" or "log_message" are set. However, if one of the
7138 conditions was an address verification, or a call to a nested ACL, the
7139 messages generated by the underlying test were being passed through. This
7140 no longer happens. The underlying message is available in $acl_verify_
7141 message for both "message" and "log_message" expansions, so it can be
7142 passed through if needed.
7144 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7145 new expansion $bh_ to give the encoded byte string without charset
7146 translation. Translation happens only if iconv() is available; HAVE_ICONV
7147 indicates this at build time. HEADERS_CHARSET gives the charset to
7148 translate to; headers_charset can change it in the configuration, and
7149 "headers charset" can change it in an individual filter file.
7151 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7152 that creates RFC 2047 encoded "words" labels them as that charset instead
7153 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7154 expansion operator; (ii) when Exim creates a From: line for a local
7155 message; (iii) when a header line is rewritten to include a "phrase" part.
7157 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7158 buggy, causing it to skip the first lines of messages whose message ID
7159 ended in 'D'. This would not have bitten before Exim release 4.14, because
7160 message IDs were unlikely to end in 'D' before then. The effect was to have
7161 incorrect size information for certain domains.
7163 45. #include "config.h" was missing at the start of the crypt16.c module. This
7164 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7167 46. If there was a timeout during a "random" callout check, Exim treated it as
7168 a failure of the random address, and carried on sending RSET and the real
7169 address. If the delay was just some slowness somewhere, the response to the
7170 original RCPT would be taken as a response to RSET and so on, causing
7171 mayhem of various kinds.
7173 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7174 when I implemented it. It didn't allow for the fact that some option values
7175 may legitimately be negative (e.g. size_addition), and it didn't even do
7176 the right test for positive values.
7178 48. Domain names in DNS records are case-independent. Exim always looks them up
7179 in lower case. Some resolvers return domain names in exactly the case they
7180 appear in the zone file, that is, they may contain uppercase letters. Not
7181 all resolvers do this - some return always lower case. Exim was treating a
7182 change of case by a resolver as a change of domain, similar to a widening
7183 of a domain abbreviation. This triggered its re-routing code and so it was
7184 trying to route what was effectively the same domain again. This normally
7185 caused routing to fail (because the router wouldn't handle the domain
7186 twice). Now Exim checks for this case specially, and just changes the
7187 casing of the domain that it ultimately uses when it transmits the message
7190 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7193 50. If a filter generated a file delivery with a non-absolute name (possible if
7194 no home directory exists for the router), the forbid_file option was not
7197 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7198 the existing equality matching.
7200 52. Exim was using ints instead of ino_t variables in some places where it was
7201 dealing with inode numbers.
7203 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7204 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7205 called TMPDIR, and if it finds it is different, it changes its value.
7207 54. The smtp_printf() function is now made available to local_scan() so
7208 additional output lines can be written before returning. There is also an
7209 smtp_fflush() function to enable the detection of a dropped connection.
7210 The variables smtp_input and smtp_batched_input are exported to
7213 55. Changed the default runtime configuration: the message "Unknown user"
7214 has been removed from the ACL, and instead placed on the localuser router,
7215 using the cannot_route_message feature. This means that any verification
7216 failures that generate their own messages won't get overridden. Similarly,
7217 the "Unrouteable address" message that was in the ACL for unverifiable
7218 relay addresses has also been removed.
7220 56. Added hosts_avoid_esmtp to the smtp transport.
7222 57. The exicyclog script was not checking for the esoteric option
7223 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7224 will work only if exicyclog is run under the appropriate euid.
7226 58. Following a discussion on the list, the rules by which Exim recognises line
7227 endings on incoming messages have been changed. The -dropcr and drop_cr
7228 options are now no-ops, retained only for backwards compatibility. The
7229 following line terminators are recognized: LF CRLF CR. However, special
7230 processing applies to CR:
7232 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7233 nor a local message in the state where . is a terminator.
7235 (ii) If a bare CR is encountered in a header line, an extra space is added
7236 after the line terminator so as not to end the header. The reasoning
7237 behind this is that bare CRs in header lines are most likely either
7238 to be mistakes, or people trying to play silly games.
7240 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7241 was being incorrectly given as 18 bytes larger than it should have been.
7242 This is a VOB (very old bug).
7244 60. This may never have affected anything current, but just in case it has:
7245 When the local host is found other than at the start of a list of hosts,
7246 the local host, those with the same MX, and any that follow, are discarded.
7247 When the list in question was part of a longer list of hosts, the following
7248 hosts (not currently being processed) were also being discarded. This no
7249 longer happens. I'm not sure if this situation could ever has previously
7252 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7255 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7256 header. This is something that is recommended in a new Internet Draft, and
7257 is something that is documented as being done by Sendmail. There are two
7258 possible values. For messages generated by the autoreply transport, Exim
7261 Auto-Submitted: auto-replied
7263 whereas for all other generated messages (e.g. bounces) it adds
7265 Auto-Submitted: auto-generated
7267 63. The "personal" condition in filters now includes a test for the
7268 Auto-Submitted: header. If it contains the string "auto-" the message it
7269 not considered personal.
7271 64. Added rcpt_include_affixes as a generic transport option.
7273 65. Added queue_only_override (default true).
7275 66. Added the syslog_duplication option.
7277 67. If what should have been the first header line of a message consisted of
7278 a space followed by a colon, Exim was mis-interpreting it as a header line.
7279 It isn't of course - it is syntactically invalid and should therefore be
7280 treated as the start of the message body. The misbehaviour could have
7281 caused a number of strange effects, including loss of data in subsequent
7282 header lines, and spool format errors.
7284 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7285 client host had authenticated. This control can now be exercised by an ACL
7286 for more flexibility.
7288 69. By default, callouts do not happen when testing with -bh. There is now a
7289 variant, -bhc, which does actually run the callout code, including
7290 consulting and updating the callout cache.
7292 70. Added support for saslauthd authentication, courtesy of Alexander
7295 71. If statvfs() failed on the spool or log directories while checking their
7296 size for availability, Exim confusingly gave the error "space shortage".
7297 Furthermore, in debugging mode it crashed with a floating point exception.
7298 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7299 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7300 serious problem, Exim now writes to the main and panic logs when this
7301 happens, with details of the failure. It then refuses to accept the
7302 incoming message, giving the message "spool directory problem" or "log
7303 directory problem" with a 421 code for SMTP messages.
7305 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7306 0, 1, and 2 exist, because some OS complain for execs without them (see
7307 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7308 descriptors. However, the code omitted to check that the open succeeded,
7309 causing mysterious errors if for some reason the permissions on /dev/null
7310 got screwed. Now Exim writes a message to the main and panic logs, and
7311 bombs out if it can't open /dev/null.
7313 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7314 interact so that it is all more flexible. It is supposed to remain
7315 backwards compatible. Also added extra_local_interfaces.
7317 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7318 to bomb out with an assertion failure - to the client this appears as a
7319 connection drop. This problem occurs in the part of the code that was taken
7320 from the Samba project. Fortunately, the assertion is in a very simple
7321 function, so I have fixed this by reproducing the function inline in the
7322 one place where it is called, and arranging for authentication to fail
7323 instead of killing the process with assert().
7325 75. The SPA client code was not working when the server requested OEM rather
7326 than Unicode encoding.
7328 76. Added code to make require_files with a specific uid setting more usable in
7329 the case where statting the file as root fails - usually a non-root-mounted
7330 NFS file system. When this happens and the failure is EACCES, Exim now
7331 forks a subprocess and does the per-uid checking as the relevant uid.
7333 77. Added process_log_path.
7335 78. If log_file_path was not explicitly set, a setting of check_log_space or
7336 check_log_inodes was ignored.
7338 79. If a space check for the spool or log partitions fails, the incident is now
7339 logged. Of course, in the latter case the data may get lost...
7341 80. Added the %p formatting code to string_format() so that it can be used to
7342 print addresses in debug_print(). Adjusted all the address printing in the
7343 debugging in store.c to use %p rather than %d.
7345 81. There was a concern that a line of code in smtp_in.c could overflow a
7346 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7347 initially expressed, the concern was not well-founded, because trailing
7348 spaces are removed early. However, if the trailing spaces were followed by
7349 a NULL, they did not get removed, so the overflow was possible. Two fixes
7352 (a) I re-wrote the offending code in a cleaner fashion.
7353 (b) If an incoming SMTP command contains a NULL character, it is rejected
7356 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7357 runs initgroups(), so that if the Exim user is in any additional groups,
7358 they will be used during message reception.
7364 The change log for 4.20 and earlier releases has been archived.