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 Bug 2351: Log failures to extract envelope addresses from message headers.
17 JH/01 Remove code calling the customisable local_scan function, unless a new
18 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
20 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
21 non-signal-safe functions being used.
23 JH/03 Bug 2269: When presented with a received message having a stupidly large
24 number of DKIM-Signature headers, disable DKIM verification to avoid
25 a resource-consumption attack. The limit is set at twenty.
27 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
28 report of oldest_pass in ${authres } in consequence, and separate out
29 some descriptions of reasons for verification fail.
31 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
32 files in the spool were present and unlocked. A queue-runner could spot
33 them, resulting in a duplicate delivery. Fix that by doing the unlock
34 after the unlink. Investigation by Tim Stewart. Take the opportunity to
35 add more error-checking on spoolfile handling while that code is being
38 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
39 No known attacks, no CVE, this is defensive hardening.
41 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
42 a queue-runner could start a delivery while other operations were ongoing.
43 Cutthrough delivery was a common victim, resulting in duplicate delivery.
44 Found and investigated by Tim Stewart. Fix by using the open message data
45 file handle rather than opening another, and not locally closing it (which
46 releases a lock) for that case, while creating the temporary .eml format
47 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
49 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
50 $sender_verify_failure/$recipient_verify_failure to "random".
52 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
55 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
56 Previously this would segfault.
58 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
61 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
62 like zero, since the resolver should be doing this for us, But we need one
63 as a CNAME but no MX presence gets the CNAME returned; we need to check
64 that doesn't point to an MX to declare it "no MX returned" rather than
65 "error, loop". A new main option is added so the older capability of
66 following some limited number of chain links is maintained.
68 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
70 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
71 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
72 now-deprecated earlier definitions used only specified the range up to TLS
73 1.2 (in the older-version library docs).
75 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
77 JH/15 Rework TLS client-side context management. Stop using a global, and
78 explicitly pass a context around. This enables future use of TLS for
79 connections to service-daemons (eg. malware scanning) while a client smtp
80 connection is using TLS; with cutthrough connections this is quite likely.
82 JH/16 Fix ARC verification to do AS checks in reverse order.
84 JH/17 Support a "tls" option on the ${readsocket } expansion item.
86 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
87 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
88 Previously the "utf8" would be re-prepended for every additional message.
90 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
91 Previously thery were accepted, resulting in issues when attempting to
92 forward messages to a non-supporting MTA.
94 PP/02 Let -n work with printing macros too, not just options.
96 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
97 one parent address was copied, and bogus data was used at delivery-logging
98 time. Either a crash (after delivery) or bogus log data could result.
99 Discovery and analysis by Tim Stewart.
101 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
102 Previously if the string ended mid-character, we did not insert the
103 promised '?' replacement.
105 PP/04 Documentation: current string operators work on bytes, not codepoints.
107 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
108 should pack well giving a smaller memory footprint so better caching and
109 therefore performance. Group the declarations where this can't be done so
110 that the byte-sized flag variables are not interspersed among pointer
111 variables, giving a better chance of good packing by the compiler.
113 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
114 non-null, to avoid issues with sites running BATV. Previously reports were
115 sent with an empty envelope sender so looked like bounces.
117 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
118 The ignore_error flag wasn't being returned from the filter subprocess so
119 was not set for later routers. Investigation and fix by Matthias Kurz.
121 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
122 and a msg:complete for the whole, when a message is manually removed using
123 -Mrm. Developement by Matthias Kurz, hacked on by JH.
125 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
126 a "Gnu special" function, asprintf() in the DB utility binary builds; I
127 hope that is portable enough.
129 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
130 requiring a known-CA anchor certificate; make it now rely entirely on the
131 TLSA as an anchor. Checking the name on the leaf cert against the name
132 on the A-record for the host is still done for TA (but not for EE mode).
134 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
135 included in delivery lines for non-proxied connections, when compiled with
136 SUPPORT_SOCKS and running with proxy logging enabled.
138 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
139 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
140 move the existing event to fire before the normal logging of message
141 failure so that custom logging is bracketed by normal logging.
143 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
144 msg:fail:internal event. Developement by Matthias Kurz.
146 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
147 far too small for todays use of crypto signatures stored there. Go all
148 the way to the max DNS message size of 64kB, even though this might be
149 overmuch for IOT constrained device use.
151 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
152 copy a string over itself. The library routine is documented as not
153 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
155 JH/32 For main options check_spool_space and check_inode_space, where the
156 platform supports 64b integers, support more than the previous 2^31 kB
157 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
158 the previous G, M, k.
160 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
161 $authenticated_fail_id variable on authentication failure. Previously
164 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
165 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
166 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
167 GNUTLS_SEC_PARAM_MEDIUM.
169 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
170 side. Previously we would continue as if no SNI had been received.
172 JH/36 Harden the handling of string-lists. When a list consisted of a sole
173 "<" character, which should be a list-separator specification, we walked
174 off past the nul-terimation.
176 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
177 causes) even when the retry time is not yet met. Previously they were
178 not, meaning that when (say) an account was over-quota and temp-rejecting,
179 and multiple senders' messages were queued, only one sender would get
180 notified on each configured delay_warning cycle.
186 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
187 When redis_servers is set to a list of > 1 element, and the Redis servers
188 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
189 case of MOVED into a DEFER case instead, thus moving the query onto the
190 next server in the list. For a cluster of N elements, all N servers must
191 be defined in redis_servers.
193 GF/02 Catch and remove uninitialized value warning in exiqsumm
194 Check for existence of @ARGV before looking at $ARGV[0]
196 JH/01 Replace the store_release() internal interface with store_newblock(),
197 which internalises the check required to safely use the old one, plus
198 the allocate and data copy operations duplicated in both (!) of the
199 extant use locations.
201 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
202 modifier. This matches the restriction on the commandline.
204 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
205 Previously only the last row was returned.
207 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
208 we assumed that tags in the header were well-formed, and parsed the
209 element content after inspecting only the first char of the tag.
210 Assumptions at that stage could crash the receive process on malformed
213 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
214 While running the DKIM ACL we operate on the Permanent memory pool so that
215 variables created with "set" persist to the DATA ACL. Also (at any time)
216 DNS lookups that fail create cache records using the Permanent pool. But
217 expansions release any allocations made on the current pool - so a dnsdb
218 lookup expansion done in the DKIM ACL releases the memory used for the
219 DNS negative-cache, and bad things result. Solution is to switch to the
220 Main pool for expansions.
221 While we're in that code, add checks on the DNS cache during store_reset,
222 active in the testsuite.
223 Problem spotted, and debugging aided, by Wolfgang Breyha.
225 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
226 When none of the hosts presented to a transport match an already-open
227 connection, close it and proceed with the list. Previously we would
228 queue the message. Spotted by Lena with Yahoo, probably involving
231 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
232 Previously a spurious "250 OK id=" response was appended to the proper
235 JH/08 The "support for" informational output now, which built with Content
236 Scanning support, has a line for the malware scanner interfaces compiled
237 in. Interface can be individually included or not at build time.
239 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
240 by the template makefile "src/EDITME". The "STREAM" support for an older
241 ClamAV interface method is removed.
243 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
244 rows affected is given instead).
246 JH/11 The runtime Berkeley DB library version is now additionally output by
247 "exim -d -bV". Previously only the compile-time version was shown.
249 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
250 SMTP connection. Previously, when one had more receipients than the
251 first, an abortive onward connection was made. Move to full support for
252 multiple onward connections in sequence, handling cutthrough connection
253 for all multi-message initiating connections.
255 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
256 routers. Previously, a multi-recipient message would fail to match the
257 onward-connection opened for the first recipient, and cause its closure.
259 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
260 a timeout on read on a GnuTLS initiating connection, resulting in the
261 initiating connection being dropped. This mattered most when the callout
262 was marked defer_ok. Fix to keep the two timeout-detection methods
265 JH/15 Relax results from ACL control request to enable cutthrough, in
266 unsupported situations, from error to silently (except under debug)
267 ignoring. This covers use with PRDR, frozen messages, queue-only and
270 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
272 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
273 metadata, resulting in a crash in free().
275 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
276 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
277 Broken also in d185889f4, with init system revamp.
279 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
280 Previously we abruptly closed the connection after reading a malware-
281 found indication; now we go on to read the "scan ok" response line,
284 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
285 ACL. Previously, a crash would result.
287 JH/19 Speed up macro lookups during configuration file read, by skipping non-
288 macro text after a replacement (previously it was only once per line) and
289 by skipping builtin macros when searching for an uppercase lead character.
291 JH/20 DANE support moved from Experimental to mainline. The Makefile control
292 for the build is renamed.
294 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
295 was allocated for every new TLS startup, meaning one per message. Fix
296 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
298 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
299 reported the original. Fix to report (as far as possible) the ACL
300 result replacing the original.
302 JH/23 Fix memory leak during multi-message connections using STARTTLS under
303 OpenSSL. Certificate information is loaded for every new TLS startup,
304 and the resources needed to be freed.
306 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
308 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
311 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
312 DATA response info to the (existing) per-recipient response info for
313 the "C=" log element. It can have useful tracking info from the
314 destination system. Patch from Simon Arlott.
316 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
317 length value. Previously this would segfault.
319 HS/02 Support Avast multiline protoocol, this allows passing flags to
320 newer versions of the scanner.
322 JH/28 Ensure that variables possibly set during message acceptance are marked
323 dead before release of memory in the daemon loop. This stops complaints
324 about them when the debug_store option is enabled. Discovered specifically
325 for sender_rate_period, but applies to a whole set of variables.
326 Do the same for the queue-runner and queue-list loops, for variables set
327 from spool message files. Do the same for the SMTP per-message loop, for
328 certain variables indirectly set in ACL operations.
330 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
331 as a multi-recipient message from a mailinglist manager). The coding had
332 an arbitrary cutoff number of characters while checking for more input;
333 enforced by writing a NUL into the buffer. This corrupted long / fast
334 input. The problem was exposed more widely when more pipelineing of SMTP
335 responses was introduced, and one Exim system was feeding another.
336 The symptom is log complaints of SMTP syntax error (NUL chars) on the
337 receiving system, and refused recipients seen by the sending system
338 (propating to people being dropped from mailing lists).
339 Discovered and pinpointed by David Carter.
341 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
342 replaced by the ${authresults } expansion.
344 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
346 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
347 allows proper process termination in container environments.
349 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
350 Previously the "final dot" had a newline after it; ensure it is CR,LF.
352 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
353 and "err_perm", deprecated since 4.83 when the RFC-defined words
354 "temperror" and "permerror" were introduced.
356 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
357 transport-filters or DKIM-signing. The restriction was lost in the
358 consolidation of verify-callout and delivery SMTP handling.
359 Extend the restriction to also cover ARC-signing.
361 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
362 in defer=pass mode supply a 450 to the initiator. Previously the message
365 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
366 tls_require_ciphers is used as before.
368 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
369 "pass_unscanned". Only tmpfails from the scanner are written to
370 the paniclog, as they may require admin intervention (permission
371 denied, license issues). Other scanner errors (like decompression
372 bombs) do not cause a paniclog entry.
374 JH/36 Fix reinitialisation of DKIM logging variable between messages.
375 Previously it was possible to log spurious information in receive log
378 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
379 triggered odd behaviour from Outlook Express clients.
381 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
384 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
385 since the IETF WG has not yet settled on that versus the original
386 "bare" representation.
388 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
389 Previously the millisecond value corrupted the output.
390 Fix also for syslog_pid=no and log_selector +pid, for which the pid
391 corrupted the output.
397 JH/01 Rework error string handling in TLS interface so that the caller in
398 more cases is responsible for logging. This permits library-sourced
399 string to be attached to addresses during delivery, and collapses
400 pairs of long lines into single ones.
402 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
403 during configuration. Wildcards are allowed and expanded.
405 JH/02 Rework error string handling in DKIM to pass more info back to callers.
406 This permits better logging.
408 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
409 do not close it down and have the child transport start it up again on
410 the passed-on TCP connection. Instead, proxy the child (and any
411 subsequent ones) for TLS via a unix-domain socket channel. Logging is
412 affected: the continued delivery log lines do not have any DNSSEC, TLS
413 Certificate or OCSP information. TLS cipher information is still logged.
415 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
416 identical IP addresses on different listening ports. Will also affect
419 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
420 add noisy ifdef guards to special-case this sillyness.
421 Patch from Bernd Kuhls.
423 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
424 than 255 are no longer allowed.
426 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
427 Disable the session-cache too, which might reduce our load. Since we
428 currrectly use a new context for every connection, both as server and
429 client, there is no benefit for these.
430 GnuTLS appears to not support tickets server-side by default (we don't
431 call gnutls_session_ticket_enable_server()) but client side is enabled
432 by default on recent versions (3.1.3 +) unless the PFS priority string
435 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
436 <https://reproducible-builds.org/specs/source-date-epoch/>.
438 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
439 the check for any unsuccessful recipients did not notice the limit, and
440 erroneously found still-pending ones.
442 JH/08 Pipeline CHUNKING command and data together, on kernels that support
443 MSG_MORE. Only in-clear (not on TLS connections).
445 JH/09 Avoid using a temporary file during transport using dkim. Unless a
446 transport-filter is involved we can buffer the headers in memory for
447 creating the signature, and read the spool data file once for the
448 signature and again for transmission.
450 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
451 4.77 as the kernel support then wasn't solid, having issues in 64bit
452 mode. Now, it's been long enough. Add support for FreeBSD also.
454 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
455 case where the routing stage had gathered several addresses to send to
456 a host before calling the transport for the first, we previously failed
457 to close down TLS in the old transport process before passing the TCP
458 connection to the new process. The new one sent a STARTTLS command
459 which naturally failed, giving a failed delivery and bloating the retry
460 database. Investigation and fix prototype from Wolfgang Breyha.
462 JH/12 Fix check on SMTP command input synchronisation. Previously there were
463 false-negatives in the check that the sender had not preempted a response
464 or prompt from Exim (running as a server), due to that code's lack of
465 awareness of the SMTP input buffering.
467 PP/04 Add commandline_checks_require_admin option.
468 Exim drops privileges sanely, various checks such as -be aren't a
469 security problem, as long as you trust local users with access to their
470 own account. When invoked by services which pass untrusted data to
471 Exim, this might be an issue. Set this option in main configuration
472 AND make fixes to the calling application, such as using `--` to stop
475 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
476 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
477 responses to those, into a single TLS record each way (this usually means
478 a single packet). As a side issue, smtp_enforce_sync now works on TLS
481 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
482 affects you only if you're dancing at the edge of the param size limits.
483 If you are, and this message makes sense to you, then: raise the
484 configured limit or use OpenSSL 1.1. Nothing we can do for older
487 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
488 cmdline element to get the documented default one. Previously it was
491 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
492 are unsuable for non-message-specific reasons - eg. connection timeout,
493 banner-time rejection.
495 JH/16 Fix logging of delivery remote port, when specified by router, under
498 PP/06 Repair manualroute's ability to take options in any order, even if one
499 is the name of a transport.
502 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
504 JH/17 Change the list-building routines interface to use the expanding-string
505 triplet model, for better allocation and copying behaviour.
507 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
508 Previously it was constructed the first time a possibly-matching string
509 was met in the configuration file input during startup; now it is done
512 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
513 compatible one, to avoid the (poorly documented) possibility of a config
514 file in the working directory redirecting the DB files, possibly correpting
515 some existing file. CVE-2017-10140 assigned for BDB.
517 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
518 cache-hot. Previously, although the result was properly cached, the
519 initial verify call returned a defer.
521 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
522 the main verify for receipient in uncached-mode.
524 JH/22 Retire historical build files to an "unsupported" subdir. These are
525 defined as "ones for which we have no current evidence of testing".
527 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
528 if present. Previously it was ignored.
530 JH/24 Start using specified-initialisers in C structure init coding. This is
531 a C99 feature (it's 2017, so now considered safe).
533 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
534 if was a fixed-sized field and bitmask ops via macros; it is now more
537 PP/07 GitHub PR 56: Apply MariaDB build fix.
538 Patch provided by Jaroslav Škarvada.
540 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
541 during Coverity cleanups [4.87 JH/47]
542 Diagnosis and fix provided by Michael Fischer v. Mollard.
544 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
545 the right size to place the terminating semicolon on its own folded
546 line, the header hash was calculated to an incorrect value thanks to
547 the (relaxed) space the fold became.
549 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
550 and confused the parent.
552 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
553 which could crash as a result. This could lead to undeliverable messages.
555 JH/28 Logging: "next input sent too soon" now shows where input was truncated
558 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
559 matters on fast-turnover and PID-randomising systems, which were getting
560 out-of-order delivery.
562 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
563 a possibly-overlapping copy. The symptom was that "Remote host closed
564 connection in response to HELO" was logged instead of the actual 4xx
567 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
568 Previously only that bufferd was discarded, resulting in SYMTP command
571 JH/32 DKIM: when a message has multiple signatures matching an identity given
572 in dkim_verify_signers, run the dkim acl once for each. Previously only
573 one run was done. Bug 2189.
575 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
576 "panic the current process" to "deliberately defer". The panic log is
577 still written with the problem list name; the mail and reject logs now
578 get a temp-reject line for the message that was being handled, saying
579 something like "domains check lookup or other defer". The SMTP 451
580 message is still "Temporary local problem".
582 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
583 A crafted sequence of BDAT commands could result in in-use memory beeing
584 freed. CVE-2017-16943.
586 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
587 from SMTP input. Previously it was always done; now only done for DATA
588 and not BDAT commands. CVE-2017-16944.
590 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
591 to the message (such as an overlong header line). Previously this was
592 not done and we did not exit BDAT mode. Followon from the previous item
593 though a different problem.
599 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
600 than -2003 did; needs libidn2 in addition to libidn.
602 JH/02 The path option on a pipe transport is now expanded before use.
604 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
605 Patch provided by "Björn", documentation fix added too.
607 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
608 missing a wire-to-host endian conversion.
610 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
611 close after a BDAT command line could be taken as a following command,
612 giving a synch failure. Fix by only checking for synch immediately
613 before acknowledging the chunk.
615 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
616 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
617 macro. Patches provided by Josh Soref.
619 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
620 Previously we did not; the RFC seems ambiguous and VRFY is not listed
621 by IANA as a service extension. However, John Klensin suggests that we
624 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
625 the dkim code may be unix-mode line endings rather than smtp wire-format
626 CRLF, so prepend a CR to any bare LF.
628 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
629 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
631 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
632 the first were themselves being wrongly included in the feed into dkim
633 processing; with most chunk sizes in use this resulted in an incorrect
634 body hash calculated value.
636 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
637 DKIM signature block, for verification. Although advised against by
638 standards it is specifically not ruled illegal.
640 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
642 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
643 missing a body hash (the bh= tag).
645 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
646 It seems that HAProxy sends the Proxy Protocol information in clear and
647 only then does a TLS startup, so do the same.
649 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
650 TCP connections (such as for Spamd) unless the daemon successfully set
651 Fast Open mode on its listening sockets. This fixes breakage seen on
652 too-old kernels or those not configured for Fast Open, at the cost of
653 requiring both directions being enabled for TFO, and TFO never being used
654 by non-daemon-related Exim processes.
656 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
657 endings, at least on the first header line. Try to canonify any that get
658 past that check, despite the cost.
660 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
661 now limited to an arbitrary five deep, while parsing addresses with the
662 strip_excess_angle_brackets option enabled.
664 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
665 instead leave the unprompted TLS handshake in socket buffer for the
666 TLS library to consume.
668 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
670 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
672 JH/16 Drop variables when they go out of scope. Memory management drops a whole
673 region in one operation, for speed, and this leaves assigned pointers
674 dangling. Add checks run only under the testsuite which checks all
675 variables at a store-reset and panics on a dangling pointer; add code
676 explicitly nulling out all the variables discovered. Fixes one known
677 bug: a transport crash, where a dangling pointer for $sending_ip_address
678 originally assigned in a verify callout, is re-used.
680 PP/06 Drop '.' from @INC in various Perl scripts.
682 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
684 PP/08 Reduce a number of compilation warnings under clang; building with
685 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
686 should be warning-free.
688 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
690 HS/01 Fix portability problems introduced by PP/08 for platforms where
691 realloc(NULL) is not equivalent to malloc() [SunOS et al].
693 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
694 chunk. This allows us to accept broken chunked messages. We need a more
695 general solution here.
697 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
698 already-broken messages in the queue.
700 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
702 JH/19 Fix reference counting bug in routing-generated-address tracking.
708 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
709 supports it and a size is available (ie. the sending peer gave us one).
711 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
712 years of being deprecated). The replacements are the ACLs
713 acl_smtp_mime and acl_not_smtp_mime.
715 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
716 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
717 or even an in-clear connection were permitted. Now, if the host lookup
718 was dnssec and dane was requested then the host is only used if the
719 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
720 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
721 if one fails this test.
722 This means that a poorly-configured remote DNS will make it incommunicado;
723 but it protects against a DNS-interception attack on it.
725 JH/04 Bug 1810: make continued-use of an open smtp transport connection
726 non-noisy when a race steals the message being considered.
728 JH/05 If main configuration option tls_certificate is unset, generate a
729 self-signed certificate for inbound TLS connections.
731 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
732 in rewrites and routers.
734 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
735 and logged a warning sing 4.83; now they are a configuration file error.
737 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
738 (lacking @domain). Apply the same qualification processing as RCPT.
740 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
742 JH/10 Support ${sha256:} applied to a string (as well as the previous
745 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
746 a cutthrough deliver is pending, as we always want to make a connection.
747 This also avoids re-routing the message when later placing the cutthrough
748 connection after a verify cache hit.
749 Do not update it with the verify result either.
751 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
752 when routing results in more than one destination address.
754 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
755 signing (which inhibits the cutthrough capability). Previously only
756 the presence of an option was tested; now an expansion evaluating as
757 empty is permissible (obviously it should depend only on data available
758 when the cutthrough connection is made).
760 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
761 the relevant preceding SMTP command did not note the pipelining mode.
763 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
764 Previously they were not counted.
766 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
767 as one having no matching records. Previously we deferred the message
768 that needed the lookup.
770 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
771 distinguished as "(=".
773 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
774 for missing MX records. Previously it only worked for missing A records.
776 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
778 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
779 after the data-go-ahead and data-ack. Patch from Jason Betts.
781 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
782 even for a "none" policy. Patch from Tony Meyer.
784 JH/22 Fix continued use of a connection for further deliveries. If a port was
785 specified by a router, it must also match for the delivery to be
788 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
789 When one of the recipients of a message was unsuitable for the connection
790 (has no matching addresses), we lost track of needing to mark it
791 deferred. As a result mail would be lost.
793 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
795 JH/25 Decoding ACL controls is now done using a binary search; the source code
796 takes up less space and should be simpler to maintain. Merge the ACL
797 condition decode tables also, with similar effect.
799 JH/26 Fix problem with one_time used on a redirect router which returned the
800 parent address unchanged. A retry would see the parent address marked as
801 delivered, so not attempt the (identical) child. As a result mail would
804 JH/27 Fix a possible security hole, wherein a process operating with the Exim
805 UID can gain a root shell. Credit to http://www.halfdog.net/ for
806 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
809 JH/28 Enable {spool,log} filesystem space and inode checks as default.
810 Main config options check_{log,spool}_{inodes,space} are now
811 100 inodes, 10MB unless set otherwise in the configuration.
813 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
814 Previously it only applied to the main-section connection policy
817 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
819 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
820 by me. Added RFC7919 DH primes as an alternative.
822 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
823 are not in the system include path.
825 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
826 GnuTLS, when a session startup failed (eg because the client disconnected)
827 Exim did stdio operations after fclose. This was exposed by a recent
828 change which nulled out the file handle after the fclose.
830 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
831 signed directly by the cert-signing cert, rather than an intermediate
832 OCSP-signing cert. This is the model used by LetsEncrypt.
834 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
836 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
837 an incoming connection.
839 HS/02 Bug 1802: Do not half-close the connection after sending a request
842 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
843 fallback to "prime256v1".
845 JH/34 SECURITY: Use proper copy of DATA command in error message.
846 Could leak key material. Remotely exploitable. CVE-2016-9963.
852 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
853 and 3.4.4 - once the server is enabled to respond to an OCSP request
854 it does even when not requested, resulting in a stapling non-aware
855 client dropping the TLS connection.
857 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
858 support variable-length bit vectors. No functional change.
860 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
861 The I= interface field on outgoing lines is now after the H= remote
862 host field, same as incoming lines. There is a separate
863 outgoing_interface log selector which allows you to disable the
866 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
867 If not running log_selector +smtp_connection the mainlog would be held
868 open indefinitely after a "too many connections" event, including to a
869 deleted file after a log rotate. Leave the per net connection logging
870 leaving it open for efficiency as that will be quickly detected by the
871 check on the next write.
873 HS/01 Bug 1671: Fix post transport crash.
874 Processing the wait-<transport> messages could crash the delivery
875 process if the message IDs didn't exist for some reason. When
876 using 'split_spool_directory=yes' the construction of the spool
877 file name failed already, exposing the same netto behaviour.
879 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
880 mime_regex ACL conditions.
882 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
883 to DSN fail messages (bounces): remote IP, remote greeting, remote response
884 to HELO, local diagnostic string.
886 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
887 log line to debug. Even when configured with a tls authenticator many
888 client connections are expected to not authenticate in this way, so
889 an authenticate fail is not an error.
891 HS/02 Add the Exim version string to the process info. This way exiwhat
892 gives some more detail about the running daemon.
894 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
895 matter for fast-change records such as DNSBLs.
897 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
898 retry record, even if constant. There may be multiple transports with
899 different interface settings and the retry behaviour needs to be kept
902 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
904 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
906 JH/10 Bug 840: fix log_defer_output option of pipe transport
908 JH/11 Bug 830: use same host for all RCPTS of a message, even under
909 hosts_randomize. This matters a lot when combined with mua_wrapper.
911 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
912 ${quote_pgsql:<string>} operator.
914 JH/13 Bug 1708: avoid misaligned access in cached lookup.
916 JH/14 Change header file name for freeradius-client. Relevant if compiling
917 with Radius support; from the Gentoo tree and checked under Fedora.
919 JH/15 Bug 1712: Introduce $prdr_requested flag variable
921 JH/16 Bug 1714: Permit an empty string as expansion result for transport
922 option transport_filter, meaning no filtering.
924 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
926 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
927 defaults to "*" (all hosts). The variable is now available when not built
928 with TLS, default unset, mainly to enable keeping the testsuite sane.
929 If a server certificate is not supplied (via tls_certificate) an error is
930 logged, and clients will find TLS connections fail on startup. Presumably
931 they will retry in-clear.
932 Packagers of Exim are strongly encouraged to create a server certificate
933 at installation time.
935 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
936 with the $config_file variable.
938 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
939 in transport context, after the attempt, and per-recipient. The latter type
940 is per host attempted. The event data is the error message, and the errno
941 information encodes the lookup type (A vs. MX) used for the (first) host,
942 and the trailing two digits of the smtp 4xx response.
944 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
945 to write to mainlog (or rejectlog, paniclog) in the window between file
946 creation and permissions/ownership being changed. Particularly affects
947 installations where exicyclog is run as root, rather than exim user;
948 result is that the running daemon panics and dies.
950 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
952 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
953 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
954 "pri" and "weight". Note that the previous implicit priority given by the
955 list order is no longer honoured.
957 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
960 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
961 by defining SUPPORT_SOCKS.
963 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
964 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
965 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
966 variables are renamed to proxy_{local,external}_{address,port}.
968 JH/27 Move Internationalisation support from Experimental to mainline, enabled
969 for a build by defining SUPPORT_I18N
971 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
972 of the query string, and make ${quote_redis:} do that quoting.
974 JH/29 Move Events support from Experimental to mainline, enabled by default
975 and removable for a build by defining DISABLE_EVENT.
977 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
979 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
980 cached by the daemon.
982 JH/32 Move Redis support from Experimental to mainline, enabled for a build
983 by defining LOOKUP_REDIS. The libhiredis library is required.
985 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
986 keys are given for lookup.
988 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
989 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
990 only supported when built with TLS support. The PolarSSL SHA routines
991 are still used when the TLS library is too old for convenient support.
993 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
994 openssl_options), for security. OpenSSL forces this from version 1.1.0
995 server-side so match that on older versions.
997 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
998 allocation for $value could be released as the expansion processing
999 concluded, but leaving the global pointer active for it.
1001 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1002 and to use the domains and local_parts ACL conditions.
1004 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1005 incorrectly not doubled on cutthrough transmission, hence seen as a
1006 body-termination at the receiving system - resulting in truncated mails.
1007 Commonly the sender saw a TCP-level error, and retransmitted the message
1008 via the normal store-and-forward channel. This could result in duplicates
1009 received - but deduplicating mailstores were liable to retain only the
1010 initial truncated version.
1012 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1014 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1016 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1017 we're in there, support oversigning also; bug 1309.
1019 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1021 HS/04 Add support for keep_environment and add_environment options.
1023 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1024 either intentional arithmetic overflow during PRNG, or testing config-
1027 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1028 delivery resulted in actual delivery. Cancel cutthrough before DATA
1031 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1032 rejects a recipient: pass the reject to the originator.
1034 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1035 Many were false-positives and ignorable, but it's worth fixing the
1038 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1039 for the new environment-manipulation done at startup. Move the routines
1040 from being local to tls.c to being global via the os.c file.
1042 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1043 an extract embedded as result-arg for a map, the first arg for extract
1044 is unavailable so we cannot tell if this is a numbered or keyed
1045 extraction. Accept either.
1051 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1054 JH/02 The smtp transport option "multi_domain" is now expanded.
1056 JH/03 The smtp transport now requests PRDR by default, if the server offers
1059 JH/04 Certificate name checking on server certificates, when exim is a client,
1060 is now done by default. The transport option tls_verify_cert_hostnames
1061 can be used to disable this per-host. The build option
1062 EXPERIMENTAL_CERTNAMES is withdrawn.
1064 JH/05 The value of the tls_verify_certificates smtp transport and main options
1065 default to the word "system" to access the system default CA bundle.
1066 For GnuTLS, only version 3.0.20 or later.
1068 JH/06 Verification of the server certificate for a TLS connection is now tried
1069 (but not required) by default. The verification status is now logged by
1070 default, for both outbound TLS and client-certificate supplying inbound
1073 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1076 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1077 Status Notification (bounce) messages are now MIME format per RFC 3464.
1078 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1079 under the control of the dsn_advertise_hosts option, and routers may
1080 have a dsn_lasthop option.
1082 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1083 default, modifiable by a malware= option. The list separator for
1084 the options can now be changed in the usual way. Bug 68.
1086 JH/10 The smtp_receive_timeout main option is now expanded before use.
1088 JH/11 The incoming_interface log option now also enables logging of the
1089 local interface on delivery outgoing connections.
1091 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1092 if the interface and destination host and port all match.
1094 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1097 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1098 Patch from Andrew Lewis.
1100 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1101 now supports optional time-restrictions, weighting, and priority
1102 modifiers per server. Patch originally by <rommer@active.by>.
1104 JH/16 The spamd_address main option now supports a mixed list of local
1105 and remote servers. Remote servers can be IPv6 addresses, and
1106 specify a port-range.
1108 JH/17 Bug 68: The spamd_address main option now supports an optional
1109 timeout value per server.
1111 JH/18 Bug 1581: Router and transport options headers_add/remove can
1112 now have the list separator specified.
1114 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1117 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1120 JH/21 Support for the A6 type of dns record is withdrawn.
1122 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1123 rather than the verbs used.
1125 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1126 from 255 to 1024 chars.
1128 JH/24 Verification callouts now attempt to use TLS by default.
1130 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1131 are generic router options now. The defaults didn't change.
1133 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1134 Original patch from Alexander Shikoff, worked over by JH.
1136 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1137 files if ZCAT_COMMAND is not executable.
1139 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1141 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1143 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1144 Normally benign, it bites when the pair was led to by a CNAME;
1145 modern usage is to not canonicalize the domain to a CNAME target
1146 (and we were inconsistent anyway for A-only vs AAAA+A).
1148 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1150 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1151 when evaluating $sender_host_dnssec.
1153 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1154 $sender_helo_dnssec variable.
1156 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1158 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1160 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1162 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1163 documented as working, but never had. Support all but $spam_report.
1165 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1166 added for tls authenticator.
1168 HS/03 Add perl_taintmode main config option
1174 TL/01 When running the test suite, the README says that variables such as
1175 no_msglog_check are global and can be placed anywhere in a specific
1176 test's script, however it was observed that placement needed to be near
1177 the beginning for it to behave that way. Changed the runtest perl
1178 script to read through the entire script once to detect and set these
1179 variables, reset to the beginning of the script, and then run through
1180 the script parsing/test process like normal.
1182 TL/02 The BSD's have an arc4random API. One of the functions to induce
1183 adding randomness was arc4random_stir(), but it has been removed in
1184 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1185 function when detected.
1187 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1188 cause callback expansion.
1190 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1191 syntax errors in an expansion can be treated as a string instead of
1192 logging or causing an error, due to the internal use of bool_lax
1193 instead of bool when processing it.
1195 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1196 server certificates when making smtp deliveries.
1198 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1200 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1202 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1204 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1205 Merged patch from Sebastian Wiedenroth.
1207 JH/05 Fix results-pipe from transport process. Several recipients, combined
1208 with certificate use, exposed issues where response data items split
1209 over buffer boundaries were not parsed properly. This eventually
1210 resulted in duplicates being sent. This issue only became common enough
1211 to notice due to the introduction of connection certificate information,
1212 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1214 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1215 size buffer was used, resulting in syntax errors when an expansion
1218 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1219 version 3.3.6 or later.
1221 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1222 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1223 both become "event_action", the variables become $event_name, $event_data
1224 and $event_defer_errno. There is a new variable $verify_mode, usable in
1225 routers, transports and related events. The tls:cert event is now also
1226 raised for inbound connections, if the main configuration event_action
1229 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1230 early OCSP support, but no stapling (appears to be less than 1.0.0).
1232 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1233 server certificate names available under the smtp transport option
1234 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1237 JH/10 Time-related extraction expansions from certificates now use the main
1238 option "timezone" setting for output formatting, and are consistent
1239 between OpenSSL and GnuTLS compilations. Bug 1541.
1241 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1242 encoded parameter in the incoming message. Bug 1558.
1244 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1245 include certificate info, eximon was claiming there were spoolfile
1248 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1250 JH/14 Log delivery-related information more consistently, using the sequence
1251 "H=<name> [<ip>]" wherever possible.
1253 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1254 are problematic for Debian distribution, omit them from the release
1257 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1259 JH/16 Fix string representation of time values on 64bit time_t architectures.
1262 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1263 output list separator was used.
1268 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1269 checkers that were complaining about end of non-void function with no
1272 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1273 This was a regression introduced in 4.83 by another bugfix.
1275 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1277 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1278 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1284 TF/01 Correctly close the server side of TLS when forking for delivery.
1286 When a message was received over SMTP with TLS, Exim failed to clear up
1287 the incoming connection properly after forking off the child process to
1288 deliver the message. In some situations the subsequent outgoing
1289 delivery connection happened to have the same fd number as the incoming
1290 connection previously had. Exim would try to use TLS and fail, logging
1291 a "Bad file descriptor" error.
1293 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1294 utilities have not been installed.
1296 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1297 temporary space as the ACL may create new global variables.
1299 TL/01 LDAP support uses per connection or global context settings, depending
1300 upon the detected version of the libraries at build time.
1302 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1303 to extract and use the src ip:port in logging and expansions as if it
1304 were a direct connection from the outside internet. PPv2 support was
1305 updated based on HAProxy spec change in May 2014.
1307 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1309 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1310 Properly escape header and check for NULL return.
1312 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1315 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1317 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1318 characters in header names, implemented as a verify condition.
1319 Contributed by Michael Fischer v. Mollard.
1321 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1322 results permerror and temperror. Previous values are deprecated but
1323 still accepted. In a future release, err_perm and err_temp will be
1324 completely removed, which will be a backward incompatibility if the
1325 ACL tests for either of these two old results. Patch contributed by
1326 user bes-internal on the mailing list.
1328 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1330 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1331 selectors, in both main and reject logs.
1333 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1336 JH/07 Add malware type "sock" for talking to simple daemon.
1338 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1340 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1341 routers/transports under cutthrough routing.
1343 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1344 numbers. Touch up "bool" conditional to keep the same definition.
1346 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1348 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1350 JH/12 Expand items in router/transport headers_add or headers_remove lists
1351 individually rather than the list as a whole. Bug 1452.
1353 Required for reasonable handling of multiple headers_ options when
1354 they may be empty; requires that headers_remove items with embedded
1355 colons must have them doubled (or the list-separator changed).
1357 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1358 view the policy declared in the DMARC record. Currently, $dmarc_status
1359 is a combined value of both the record presence and the result of the
1362 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1364 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1365 dnslookup router and the smtp transport (applying to the forward
1368 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1369 of ldap servers used for a specific lookup. Patch provided by Heiko
1372 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1373 New variable $lookup_dnssec_authenticated for observability.
1375 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1376 Patch submitted by Lars Timman.
1378 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1380 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1381 Requires trusted mode and valid format message id, aborts otherwise.
1382 Patch contributed by Heiko Schlichting.
1384 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1385 certextract with support for various fields. Bug 1358.
1387 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1388 is requested by default, modifiable by smtp transport option
1391 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1392 operate on certificate variables to give certificate fingerprints
1393 Also new ${sha256:cert_variable}.
1395 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1397 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1398 Christian Aistleitner.
1400 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1402 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1403 file. Patch from Wolfgang Breyha.
1405 JH/25 Expand the coverage of the delivery $host and $host_address to
1406 client authenticators run in verify callout. Bug 1476.
1408 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1409 align with daemon_smtp_ports. Bug 72.
1411 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1412 support and error reporting did not work properly.
1414 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1415 and is readable. Patch from Andrew Colin Kissa.
1417 TL/14 Enhance documentation of ${run expansion and how it parses the
1418 commandline after expansion, particularly in the case when an
1419 unquoted variable expansion results in an empty value.
1421 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1423 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1424 by renaming away from it. Addresses GH issue 15, reported by
1427 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1429 TL/15 SECURITY: prevent double expansion in math comparison functions
1430 (can expand unsanitized data). Not remotely exploitable.
1437 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1439 PP/02 Make -n do something, by making it not do something.
1440 When combined with -bP, the name of an option is not output.
1442 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1445 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1446 $sender_host_name and config options to manage this, and basic check
1449 PP/05 DSCP support for outbound connections and control modifier for inbound.
1451 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1452 (Only plugin which currently uses this is kerberos4, which nobody should
1453 be using, but we should make it available and other future plugins might
1454 conceivably use it, even though it would break NAT; stuff *should* be
1455 using channel bindings instead).
1457 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1458 name; added for Sendmail compatibility; requires admin caller.
1459 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1460 just ignore it); requires trusted caller.
1461 Also parse but ignore: -Ac -Am -X<logfile>
1464 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1466 TL/02 Add +smtp_confirmation as a default logging option.
1468 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1469 Patch by Magnus Holmgren from 2007-02-20.
1471 TL/04 Bugzilla 1281 - Spec typo.
1472 Bugzilla 1283 - Spec typo.
1473 Bugzilla 1290 - Spec grammar fixes.
1475 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1477 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1479 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1480 mailing list by by Dmitry Isaikin.
1482 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1484 JH/02 Support "G" suffix to numbers in ${if comparisons.
1486 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1488 NM/01 Bugzilla 1197 - Spec typo
1489 Bugzilla 1196 - Spec examples corrections
1491 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1493 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1494 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1497 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1498 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1500 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1501 "acl {{name}{arg}...}", and optional args on acl condition
1504 JH/05 Permit multiple router/transport headers_add/remove lines.
1506 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1508 JH/07 Avoid using a waiting database for a single-message-only transport.
1509 Performance patch from Paul Fisher. Bugzilla 1262.
1511 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1514 JH/09 Add $headers_added variable, with content from use of ACL modifier
1515 add_header (but not yet added to the message). Bugzilla 199.
1517 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1518 Pulled from Bugzilla 817 by Wolfgang Breyha.
1520 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1522 (nb: this is the same fix as in Exim 4.80.1)
1524 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1527 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1530 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1532 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1533 advertise SMTP AUTH mechanism to us, instead of a generic
1534 protocol violation error. Also, make Exim more robust to bad
1535 data from the Dovecot auth socket.
1537 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1539 When a queue runner is handling a message, Exim first routes the
1540 recipient addresses, during which it prunes them based on the retry
1541 hints database. After that it attempts to deliver the message to
1542 any remaining recipients. It then updates the hints database using
1545 So if a recipient address works intermittently, it can get repeatedly
1546 deferred at routing time. The retry hints record remains fresh so the
1547 address never reaches the final cutoff time.
1549 This is a fairly common occurrence when a user is bumping up against
1550 their storage quota. Exim had some logic in its local delivery code
1551 to deal with this. However it did not apply to per-recipient defers
1552 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1554 This change adds a proper retry rule check during routing so that the
1555 final cutoff time is checked against the message's age. We only do
1556 this check if there is an address retry record and there is not a
1557 domain retry record; this implies that previous attempts to handle
1558 the address had the retry_use_local_parts option turned on. We use
1559 this as an approximation for the destination being like a local
1560 delivery, as in LMTP.
1562 I suspect this new check makes the old local delivery cutoff check
1563 redundant, but I have not verified this so I left the code in place.
1565 TF/02 Correct gecos expansion when From: is a prefix of the username.
1567 Test 0254 submits a message to Exim with the header
1571 When I ran the test suite under the user fanf2, Exim expanded
1572 the header to contain my full name, whereas it should have added
1573 a Resent-Sender: header. It erroneously treats any prefix of the
1574 username as equal to the username.
1576 This change corrects that bug.
1578 GF/01 DCC debug and logging tidyup
1579 Error conditions log to paniclog rather than rejectlog.
1580 Debug lines prefixed by "DCC: " to remove any ambiguity.
1582 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1584 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1585 Bug spotted by Jeremy Harris; was flawed since initial commit.
1586 Would have resulted in OCSP responses post-SNI triggering an Exim
1587 NULL dereference and crash.
1589 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1591 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1592 Bug detection, analysis and fix by Samuel Thibault.
1593 Bugzilla 1331, Debian bug #698092.
1595 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1597 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1598 Server implementation by Todd Lyons, client by JH.
1599 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1600 config variable "prdr_enable" controls whether the server
1601 advertises the facility. If the client requests PRDR a new
1602 acl_data_smtp_prdr ACL is called once for each recipient, after
1603 the body content is received and before the acl_smtp_data ACL.
1604 The client is controlled by both of: a hosts_try_prdr option
1605 on the smtp transport, and the server advertisement.
1606 Default client logging of deliveries and rejections involving
1607 PRDR are flagged with the string "PRDR".
1609 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1610 fclose(). Diagnosis by Todd Lyons.
1612 PP/17 Update configure.default to handle IPv6 localhost better.
1613 Patch by Alain Williams (plus minor tweaks).
1616 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1617 This is now consistent with GnuTLS, and is now documented: the
1618 previous undocumented portable approach to treating the option as
1619 unset was to force an expansion failure. That still works, and
1620 an empty string is now equivalent.
1622 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1623 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1624 not performing validation itself.
1626 PP/20 Added force_command boolean option to pipe transport.
1627 Patch from Nick Koston, of cPanel Inc.
1629 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1632 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1634 PP/21 Fix eximon continuous updating with timestamped log-files.
1635 Broken in a format-string cleanup in 4.80, missed when I repaired the
1636 other false fix of the same issue.
1637 Report and fix from Heiko Schlichting.
1640 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1641 Report from Prashanth Katuri.
1643 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1644 It's SecureTransport, so affects any MacOS clients which use the
1645 system-integrated TLS libraries, including email clients.
1647 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1648 using a MIME ACL for non-SMTP local injection.
1649 Report and assistance in diagnosis by Warren Baker.
1651 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1653 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1655 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1656 last id that failed so it may be referenced in subsequent ACL's.
1658 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1661 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1662 ldap library initialization, allowing self-signed CA's to be
1663 used. Also properly sets require_cert option later in code by
1664 using NULL (global ldap config) instead of ldap handle (per
1665 session). Bug diagnosis and testing by alxgomz.
1667 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1668 the src/util/ subdirectory.
1670 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1671 renamed to Transport Post Delivery Action by Jeremy Harris, as
1674 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1675 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1676 redis_servers = needs to be configured which will be used by the redis
1677 lookup. Patch from Warren Baker, of The Packet Hub.
1679 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1681 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1682 hostname or reverse DNS when processing a host list. Used suggestions
1683 from multiple comments on this bug.
1685 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1687 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1688 Missed a few lines, added it to make the runtest require no keyboard
1691 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1692 contains upper case chars. Make router use caseful_local_part.
1694 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1695 support when GnuTLS has been built with p11-kit.
1701 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1703 This, or similar/improved, will also be change PP/11 of 4.82.
1709 PP/01 Handle short writes when writing local log-files.
1710 In practice, only affects FreeBSD (8 onwards).
1711 Bugzilla 1053, with thanks to Dmitry Isaikin.
1713 NM/01 Bugzilla 949 - Documentation tweak
1715 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1718 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1720 PP/02 Implemented gsasl authenticator.
1722 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1724 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1725 `pkg-config foo` for cflags/libs.
1727 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1728 with rest of GSASL and with heimdal_gssapi.
1730 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1731 `pkg-config foo` for cflags/libs for the TLS implementation.
1733 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1734 properties get this fed in as external SSF. A number of robustness
1735 and debugging improvements to the cyrus_sasl authenticator.
1737 PP/08 cyrus_sasl server now expands the server_realm option.
1739 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1740 Patch by Jeremy Harris.
1742 PP/10 Added dbmjz lookup type.
1744 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1746 PP/12 MAIL args handles TAB as well as SP, for better interop with
1747 non-compliant senders.
1748 Analysis and variant patch by Todd Lyons.
1750 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1751 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1752 Patch from Dirk Mueller <dmueller@suse.com>
1754 PP/13 tls_peerdn now print-escaped for spool files.
1755 Observed some $tls_peerdn in wild which contained \n, which resulted
1756 in spool file corruption.
1758 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1759 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1760 or write after TLS renegotiation, which otherwise led to messages
1763 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1764 as a tracking header (ie: a signed header comes before the signature).
1765 Patch from Wolfgang Breyha.
1767 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1768 comma-sep list; embedded commas doubled.
1770 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1772 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1774 Report and patch from Dmitry Banschikov.
1776 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1777 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1778 failures. We appear to now support TLS1.1+ with Exim.
1780 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1781 lets Exim select keys and certificates based upon TLS SNI from client.
1782 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1783 before an outbound SMTP session. New log_selector, +tls_sni.
1785 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1786 NULL dereference. Report and patch from Alun Jones.
1788 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1789 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1790 Not seeing resolver debug output on NetBSD, but suspect this is a
1791 resolver implementation change.
1793 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1794 Left warnings. Added "eximon gdb" invocation mode.
1796 PP/21 Defaulting "accept_8bitmime" to true, not false.
1798 PP/22 Added -bw for inetd wait mode support.
1800 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1801 locate the relevant includes and libraries. Made this the default.
1803 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1804 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1806 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1807 This may cause build issues on older platforms.
1809 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1810 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1811 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1812 Added SNI support via GnuTLS too.
1813 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1815 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1817 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1818 Applied second patch from Janne, implementing suggestion to default
1819 multiple-strings-in-record handling to match SPF spec.
1821 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1823 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1824 read-only, out of scope).
1825 Patch from Wolfgang Breyha, report from Stuart Northfield.
1827 PP/29 Fix three issues highlighted by clang analyser static analysis.
1828 Only crash-plausible issue would require the Cambridge-specific
1829 iplookup router and a misconfiguration.
1830 Report from Marcin Mirosław.
1832 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1834 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1835 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1836 As part of this, removing so much warning spew let me fix some minor
1837 real issues in debug logging.
1839 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1840 assignment on my part. Fixed.
1842 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1843 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1844 Janne Snabb (who went above and beyond: thank you).
1846 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1847 string otherwise requires a connection and a bunch more work and it's
1848 relatively easy to get wrong. Should also expose TLS library linkage
1851 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1852 64-bit ${eval} (JH/03).
1854 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1855 GNU libc to support some of the 64-bit stuff, should not lead to
1856 conflicts. Defined before os.h is pulled in, so if a given platform
1857 needs to override this, it can.
1859 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1860 protection layer was required, which is not implemented.
1861 Bugzilla 1254, patch from Wolfgang Breyha.
1863 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1864 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1865 tls_dhparam take prime identifiers. Also unbreak combination of
1866 OpenSSL+DH_params+TLSSNI.
1868 PP/39 Disable SSLv2 by default in OpenSSL support.
1874 PP/01 Solaris build fix for Oracle's LDAP libraries.
1875 Bugzilla 1109, patch from Stephen Usher.
1877 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1879 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1882 TF/02 Fix a couple more cases where we did not log the error message
1883 when unlink() failed. See also change 4.74-TF/03.
1885 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1886 lock up or crash if it happened to be inside a call to libc when it
1887 got a SIGUSR1 from exiwhat.
1889 The SIGUSR1 handler appends the current process status to the process
1890 log which is later printed by exiwhat. It used to use the general
1891 purpose logging code to do this, but several functions it calls are
1892 not safe for signals.
1894 The new output code in the SIGUSR1 handler is specific to the process
1895 log, and simple enough that it's easy to inspect for signal safety.
1896 Removing some special cases also simplifies the general logging code.
1897 Removing the spurious timestamps from the process log simplifies
1900 TF/04 Improved ratelimit ACL condition.
1902 The /noupdate option has been deprecated in favour of /readonly which
1903 has clearer semantics. The /leaky, /strict, and /readonly update modes
1904 are mutually exclusive. The update mode is no longer included in the
1905 database key; it just determines when the database is updated. (This
1906 means that when you upgrade Exim will forget old rate measurements.)
1908 Exim now checks that the per_* options are used with an update mode that
1909 makes sense for the current ACL. For example, when Exim is processing a
1910 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1911 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1912 must specify per_mail/readonly. If you omit the update mode it defaults to
1913 /leaky where that makes sense (as before) or /readonly where required.
1915 The /noupdate option is now undocumented but still supported for
1916 backwards compatibility. It is equivalent to /readonly except that in
1917 ACLs where /readonly is required you may specify /leaky/noupdate or
1918 /strict/noupdate which are treated the same as /readonly.
1920 A useful new feature is the /count= option. This is a generalization
1921 of the per_byte option, so that you can measure the throughput of other
1922 aggregate values. For example, the per_byte option is now equivalent
1923 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1925 The per_rcpt option has been generalized using the /count= mechanism
1926 (though it's more complicated than the per_byte equivalence). When it is
1927 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1928 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1929 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1930 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1931 Note that using per_rcpt with a non-readonly update mode in more than
1932 one ACL will cause the recipients to be double-counted. (The per_mail
1933 and per_byte options don't have this problem.)
1935 The handling of very low rates has changed slightly. If the computed rate
1936 is less than the event's count (usually one) then this event is the first
1937 after a long gap. In this case the rate is set to the same as this event's
1938 count, so that the first message of a spam run is counted properly.
1940 The major new feature is a mechanism for counting the rate of unique
1941 events. The new per_addr option counts the number of different
1942 recipients that someone has sent messages to in the last time period. It
1943 behaves like per_rcpt if all the recipient addresses are different, but
1944 duplicate recipient addresses do not increase the measured rate. Like
1945 the /count= option this is a general mechanism, so the per_addr option
1946 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1947 example, measure the rate that a client uses different sender addresses
1948 with the options per_mail/unique=$sender_address. There are further
1949 details in the main documentation.
1951 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1953 TF/06 Removed a few PCRE remnants.
1955 TF/07 Automatically extract Exim's version number from tags in the git
1956 repository when doing development or release builds.
1958 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1959 Bugzilla 879. Patch from Paul Fisher.
1961 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1962 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1965 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1967 PP/05 Variable $av_failed, true if the AV scanner deferred.
1968 Bugzilla 1078. Patch from John Horne.
1970 PP/06 Stop make process more reliably on build failure.
1971 Bugzilla 1087. Patch from Heiko Schlittermann.
1973 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1974 Bugzilla 1089. Patch from Heiko Schlittermann.
1976 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1977 Bugzilla 1131. Patch from Holger Weiß.
1979 PP/09 Handle IPv6 addresses with SPF.
1980 Bugzilla 860. Patch from Wolfgang Breyha.
1982 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1984 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1987 PP/11 match_* no longer expand right-hand-side by default.
1988 New compile-time build option, EXPAND_LISTMATCH_RHS.
1989 New expansion conditions, "inlist", "inlisti".
1991 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1993 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1995 PP/14 fix log_write() format string regression from TF/03.
1996 Bugzilla 1152. Patch from Dmitry Isaikin.
2002 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2004 PP/02 Harmonised TLS library version reporting; only show if debugging.
2005 Layout now matches that introduced for other libraries in 4.74 PP/03.
2007 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2009 PP/04 New "dns_use_edns0" global option.
2011 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2014 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2015 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2017 TK/01 Updated PolarSSL code to 0.14.2.
2018 Bugzilla 1097. Patch from Andreas Metzler.
2020 PP/07 Catch divide-by-zero in ${eval:...}.
2021 Fixes bugzilla 1102.
2023 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2026 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2027 format-string attack -- SECURITY: remote arbitrary code execution.
2029 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2030 time unintentionally subject to list matching rules, letting the header
2031 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2032 arbitrary string expansion). This allowed for information disclosure.
2034 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2035 INT_MIN/-1 -- value coerced to INT_MAX.
2041 NM/01 Workaround for PCRE version dependency in version reporting
2044 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2045 This fixes portability to compilers other than gcc, notably
2046 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2048 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2049 makefiles for portability to HP-UX and POSIX correctness.
2051 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2052 Also via indented variable definition in the Makefile.
2053 (Debugging by Oliver Heesakkers).
2055 PP/02 Restore caching of spamd results with expanded spamd_address.
2056 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2058 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2059 Improves build reliability. Fix from: Frank Elsner
2061 NM/02 Fix wide character breakage in the rfc2047 coding
2062 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2064 NM/03 Allow underscore in dnslist lookups
2065 Fixes bug 1026. Patch from Graeme Fowler
2067 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2068 Code patches from Adam Ciarcinski of NetBSD.
2070 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2073 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2074 is logged, to avoid truncation. Patch from John Horne.
2076 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2077 Patch from Jakob Hirsch.
2079 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2080 SQL string expansion failure details.
2081 Patch from Andrey Oktyabrski.
2083 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2084 Patch from Simon Arlott.
2086 PP/09 New lookups functionality failed to compile on old gcc which rejects
2087 extern declarations in function scope.
2088 Patch from Oliver Fleischmann
2090 PP/10 Use sig_atomic_t for flags set from signal handlers.
2091 Check getgroups() return and improve debugging.
2092 Fixed developed for diagnosis in bug 927 (which turned out to be
2095 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2096 Patch from Mark Zealey.
2098 PP/12 Bugzilla 1056: Improved spamd server selection.
2099 Patch from Mark Zealey.
2101 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2102 Based on patch from Heiko Schlittermann.
2104 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2105 Patch from Uwe Doering, sign-off by Michael Haardt.
2107 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2108 variable declaration deep within a block. Bug and patch from
2111 PP/15 lookups-Makefile IRIX compatibility coercion.
2113 PP/16 Make DISABLE_DKIM build knob functional.
2115 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2116 Patch by Simon Arlott
2118 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2119 variable argument macros. Our copy now differs from upstream.
2125 TF/01 Failure to get a lock on a hints database can have serious
2126 consequences so log it to the panic log.
2128 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2129 controlled using the smtp_confirmation log selector.
2131 TF/03 Include the error message when we fail to unlink a spool file.
2133 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2134 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2135 for maintaining out-of-tree patches for some time.
2137 PP/01 Bugzilla 139: Documentation and portability issues.
2138 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2139 Handle per-OS dynamic-module compilation flags.
2141 PP/02 Let /dev/null have normal permissions.
2142 The 4.73 fixes were a little too stringent and complained about the
2143 permissions on /dev/null. Exempt it from some checks.
2144 Reported by Andreas M. Kirchwitz.
2146 PP/03 Report version information for many libraries, including
2147 Exim version information for dynamically loaded libraries. Created
2148 version.h, now support a version extension string for distributors
2149 who patch heavily. Dynamic module ABI change.
2151 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2152 privilege escalation vulnerability whereby the Exim run-time user
2153 can cause root to append content of the attacker's choosing to
2156 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2159 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2160 If dropping privileges for untrusted macros, we disabled normal logging
2161 on the basis that it would fail; for the Exim run-time user, this is not
2162 the case, and it resulted in successful deliveries going unlogged.
2163 Fixed. Reported by Andreas Metzler.
2169 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2170 only prepend for the Resent-* case. Fixes regression introduced in
2171 Exim 4.70 by NM/22 for Bugzilla 607.
2173 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2174 increasing numbers of administrators be bitten by this.
2176 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2178 PP/03 Bugzilla 994: added openssl_options main configuration option.
2180 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2182 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2184 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2186 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2187 without a peer certificate, leading to a segfault because of an
2188 assumption that peers always have certificates. Be a little more
2189 paranoid. Problem reported by Martin Tscholak.
2191 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2192 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2193 NB: ClamAV planning to remove STREAM in "middle of 2010".
2194 CL also introduces -bmalware, various -d+acl logging additions and
2195 more caution in buffer sizes.
2197 PP/09 Implemented reverse_ip expansion operator.
2199 PP/10 Bugzilla 937: provide a "debug" ACL control.
2201 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2203 PP/12 Bugzilla 973: Implement --version.
2205 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2207 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2209 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2211 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2212 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2213 ignore trailing whitespace.
2215 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2217 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2220 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2221 Notification from Dr Andrew Aitchison.
2223 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2224 ExtendedDetectionInfo response format.
2225 Notification from John Horne.
2227 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2230 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2231 XSL and documented dependency on system catalogs, with examples of how
2234 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2237 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2238 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2239 configuration file which is writeable by the Exim user or group.
2241 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2242 of configuration files to cover files specified with the -C option if
2243 they are going to be used with root privileges, not just the default
2246 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2247 option (effectively making it always true).
2249 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2250 files to be used while preserving root privileges.
2252 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2253 that rogue child processes cannot use them.
2255 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2256 run-time user, instead of root.
2258 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2259 Exim run-time user without dropping privileges.
2261 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2262 result string, instead of calling string_vformat() twice with the same
2265 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2266 for other users. Others should always drop root privileges if they use
2267 -C on the command line, even for a whitelisted configure file.
2269 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2271 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2277 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2278 $data_path, and $header_path variables; fixed documentation bugs and
2281 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2282 exipick to access non-standard spools, including the "frozen" queue
2285 NM/01 Bugzilla 965: Support mysql stored procedures.
2286 Patch from Alain Williams
2288 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2290 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2291 Patch from Andreas Metzler
2293 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2294 Patch from Kirill Miazine
2296 NM/05 Bugzilla 671: Added umask to procmail example.
2298 JJ/03 installed exipick 20100323.0, fixing doc bug
2300 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2301 directory. Notification and patch from Dan Rosenberg.
2303 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2305 TK/02 Improve log output when DKIM signing operation fails.
2307 MH/01 Treat the transport option dkim_domain as a colon separated
2308 list, not as a single string, and sign the message with each element,
2309 omitting multiple occurences of the same signer.
2311 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2312 Bugzilla 985, 986. Patch by Simon Arlott
2314 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2315 Patch by Simon Arlott
2317 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2318 MBX locking. Notification from Dan Rosenberg.
2324 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2326 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2328 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2330 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2332 NM/04 Bugzilla 915: Flag broken perl installation during build.
2338 TK/01 Added patch by Johannes Berg that expands the main option
2339 "spamd_address" if it starts with a dollar sign.
2341 TK/02 Write list of recipients to X-Envelope-Sender header when building
2342 the mbox-format spool file for content scanning (suggested by Jakob
2345 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2346 (http://www.dcc-servers.net/) support via dccifd. Activated by
2347 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2349 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2350 by Mark Daniel Reidel <mr@df.eu>.
2352 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2353 When building exim an external PCRE library is now needed -
2354 PCRE is a system library on the majority of modern systems.
2355 See entry on PCRE_LIBS in EDITME file.
2357 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2358 conversation. Added nologin parameter to request.
2359 Patch contributed by Kirill Miazine.
2361 TF/01 Do not log submission mode rewrites if they do not change the address.
2363 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2365 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2366 log files in place. Contributed by Roberto Lima.
2368 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2370 TF/03 Bugzilla 615: When checking the local_parts router precondition
2371 after a local_part_suffix or local_part_prefix option, Exim now
2372 does not use the address's named list lookup cache, since this
2373 contains cached lookups for the whole local part.
2375 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2376 Robert Millan. Documentation is in experimental-spec.txt.
2378 TF/04 Bugzilla 668: Fix parallel build (make -j).
2380 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2382 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2383 Patch provided by Jan Srzednicki.
2385 TF/05 Leading white space used to be stripped from $spam_report which
2386 wrecked the formatting. Now it is preserved.
2388 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2389 that they are available at delivery time.
2391 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2393 TF/08 TLS error reporting now respects the incoming_interface and
2394 incoming_port log selectors.
2396 TF/09 Produce a more useful error message if an SMTP transport's hosts
2397 setting expands to an empty string.
2399 NM/06 Bugzilla 744: EXPN did not work under TLS.
2400 Patch provided by Phil Pennock.
2402 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2403 Patch provided by Richard Godbee.
2405 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2406 acl_smtp_notquit, added index entry.
2408 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2409 Patch provided by Eugene Bujak.
2411 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2412 accept(). Patch provided by Maxim Dounin.
2414 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2415 Patch provided by Phil Pennock.
2417 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2419 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2420 Patch provided by Brad "anomie" Jorsch.
2422 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2423 Patch provided by Dean Brooks.
2425 TK/05 Add native DKIM support (does not depend on external libraries).
2427 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2428 Patch provided by Graeme Fowler.
2430 NM/16 Bugzilla 851: Documentation example syntax fix.
2432 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2434 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2437 NM/19 Bugzilla 745: TLS version reporting.
2438 Patch provided by Phil Pennock.
2440 NM/20 Bugzilla 167: bool: condition support.
2441 Patch provided by Phil Pennock.
2443 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2444 clients. Patch provided by Phil Pennock.
2446 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2447 Patch provided by Brad "anomie" Jorsch.
2449 NM/23 Bugzilla 687: Fix misparses in eximstats.
2450 Patch provided by Heiko Schlittermann.
2452 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2453 Patch provided by Heiko Schlittermann.
2455 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2456 plus update to original patch.
2458 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2460 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2461 Patch provided by David Brownlee.
2463 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2465 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2467 NM/30 Bugzilla 888: TLS documentation bugfixes.
2469 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2471 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2472 Unlike the original bugzilla I have changed all shell scripts in src tree.
2474 NM/33 Bugzilla 898: Transport filter timeout fix.
2475 Patch by Todd Rinaldo.
2477 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2478 Patch by Serge Demonchaux.
2480 NM/35 Bugzilla 39: Base64 decode bug fixes.
2481 Patch by Jakob Hirsch.
2483 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2485 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2487 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2489 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2495 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2496 ALT-N's libdkim that I have put here:
2497 http://duncanthrax.net/exim-experimental/
2499 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2500 were called 'true' and it seems that C99 defines that as a reserved
2501 keyword to be used with 'bool' variable types. That means you could
2502 not include C99-style headers which use bools without triggering
2503 build errors in sieve.c.
2505 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2506 as mailq or other aliases. Changed the --help handling significantly
2507 to do whats expected. exim_usage() emits usage/help information.
2509 SC/01 Added the -bylocaldomain option to eximstats.
2511 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2513 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2515 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2521 PH/01 Another patch from the Sieve maintainer.
2523 PH/02 When an IPv6 address is converted to a string for single-key lookup
2524 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2525 dots are used instead of colons so that keys in lsearch files need not
2526 contain colons. This was done some time before quoting was made available
2527 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2528 (notated using the quote facility) so as to distinguish them from IPv4
2529 keys. This meant that lookups for IP addresses in host lists did not work
2530 for iplsearch lookups.
2532 This has been fixed by arranging for IPv6 addresses to be expressed with
2533 colons if the lookup type is iplsearch. This is not incompatible, because
2534 previously such lookups could never work.
2536 The situation is now rather anomalous, since one *can* have colons in
2537 ordinary lsearch keys. However, making the change in all cases is
2538 incompatible and would probably break a number of configurations.
2540 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2543 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2544 conversion specification without a maximum field width, thereby enabling
2545 a rogue spamd server to cause a buffer overflow. While nobody in their
2546 right mind would setup Exim to query an untrusted spamd server, an
2547 attacker that gains access to a server running spamd could potentially
2548 exploit this vulnerability to run arbitrary code as the Exim user.
2550 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2551 $primary_hostname instead of what libspf2 thinks the hosts name is.
2553 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2554 a directory entry by the name of the lookup key. Previously, if a
2555 symlink pointed to a non-existing file or a file in a directory that
2556 Exim lacked permissions to read, a lookup for a key matching that
2557 symlink would fail. Now it is enough that a matching directory entry
2558 exists, symlink or not. (Bugzilla 503.)
2560 PH/03 The body_linecount and body_zerocount variables are now exported in the
2563 PH/04 Added the $dnslist_matched variable.
2565 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2566 This means they are set thereafter only if the connection becomes
2569 PH/06 Added the client_condition to authenticators so that some can be skipped
2570 by clients under certain conditions.
2572 PH/07 The error message for a badly-placed control=no_multiline_responses left
2573 "_responses" off the end of the name.
2575 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2577 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2578 (without spaces) instead of just copying the configuration text.
2580 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2582 PH/11 Added $max_received_linelength.
2584 PH/12 Added +ignore_defer and +include_defer to host lists.
2586 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2587 way in which PCRE > 7.0 is built.
2589 PH/14 Implemented queue_only_load_latch.
2591 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2592 MAIL command. The effect was to mangle the value on 64-bit systems.
2594 PH/16 Another patch from the Sieve maintainer.
2596 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2598 PH/18 If a system quota error occurred while trying to create the file for
2599 a maildir delivery, the message "Mailbox is full" was not appended to the
2600 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2601 only to a quota excession during the actual writing of the file.
2603 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2604 characters?) which causes problems in log lines. The DN values are now
2605 passed through string_printing() before being added to log lines.
2607 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2608 and InterBase are left for another time.)
2610 PH/21 Added message_body_newlines option.
2612 PH/22 Guard against possible overflow in moan_check_errorcopy().
2614 PH/23 POSIX allows open() to be a macro; guard against that.
2616 PH/24 If the recipient of an error message contained an @ in the local part
2617 (suitably quoted, of course), incorrect values were put in $domain and
2618 $local_part during the evaluation of errors_copy.
2624 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2625 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2628 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2629 issue a MAIL command.
2631 PH/02 In an ACL statement such as
2633 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2635 if a client was not listed at all, or was listed with a value other than
2636 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2637 the condition was not true (as it should be), so access was not denied.
2638 The bug was that the ! inversion was incorrectly passed on to the second
2639 item. This has been fixed.
2641 PH/03 Added additional dnslists conditions == and =& which are different from
2642 = and & when the dns lookup returns more than one IP address.
2644 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2645 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2647 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2648 FSYNC, which compiles an option called disable_fsync that allows for
2649 bypassing fsync(). The documentation is heavily laced with warnings.
2651 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2653 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2654 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2655 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2656 including adding "make clean"; (3) Added -fPIC when compiling the test
2657 dynamically loaded module, to get rid of a warning.
2659 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2660 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2661 = 0s. The bug is otherwise harmless.
2663 PH/07 There was a bug in the dovecot authenticator such that the value of
2664 $auth1 could be overwritten, and so not correctly preserved, after a
2665 successful authentication. This usually meant that the value preserved by
2666 the server_setid option was incorrect.
2668 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2670 PH/09 Installed PCRE release 7.0.
2672 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2673 run for batched SMTP input. It is now run at the start of every message
2674 in the batch. While fixing this I discovered that the process information
2675 (output by running exiwhat) was not always getting set for -bs and -bS
2676 input. This is fixed, and it now also says "batched" for BSMTP.
2678 PH/11 Added control=no_pipelining.
2680 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2681 patch, slightly modified), and move the expansion of helo_data till after
2682 the connection is made in the smtp transport (so it can use these
2685 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2687 PH/14 Added log_selector = +pid.
2689 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2691 PH/16 Add ${if forany and ${if forall.
2693 PH/17 Added dsn_from option to vary the From: line in DSNs.
2695 PH/18 Flush SMTP output before performing a callout, unless control =
2696 no_callout_flush is set.
2698 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2699 was true (the default) a successful delivery failed to delete the retry
2700 item, thus causing premature timeout of the address. The bug is now
2703 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2705 PH/21 Long custom messages for fakedefer and fakereject are now split up
2706 into multiline responses in the same way that messages for "deny" and
2707 other ACL rejections are.
2709 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2710 with slight modification.
2712 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2713 draft, changing the syntax and factoring some duplicate code".
2715 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2716 for deliveries of the second and subsequent messages over the same SMTP
2719 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2720 ${reduce, with only minor "tidies".
2722 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2724 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2725 expansion side effects.
2727 PH/27 When a message times out after an over-quota error from an Exim-imposed
2728 quota, the bounce message says "mailbox is full". This message was not
2729 being given when it was a system quota that was exceeded. It now should
2732 MH/03 Made $recipients available in local_scan(). local_scan() already has
2733 better access to the recipient list through recipients_list[], but
2734 $recipients can be useful in postmaster-provided expansion strings.
2736 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2737 in the case of a MAIL command with additional options following the
2738 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2739 were accidentally chopped off.
2741 PH/29 SMTP synchronization checks are implemented when a command is read -
2742 there is a check that no more input is waiting when there shouldn't be
2743 any. However, for some commands, a delay in an ACL can mean that it is
2744 some time before the response is written. In this time, more input might
2745 arrive, invalidly. So now there are extra checks after an ACL has run for
2746 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2747 pipelining has not been advertised.
2749 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2751 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2752 returned in the SMTP response when smtp_return_error_details was false.
2753 This has been fixed.
2755 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2756 instead of the C I/O that was originally supplied, because problems were
2757 reported on Solaris.
2759 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2760 Exim which did not show up earlier: it was assuming that a call to
2761 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2762 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2763 was a macro that became an assignment, so it seemed to work. This has
2764 changed to a proper function call with a void return, hence the compile
2765 error. Exim's code has been fixed.
2767 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2770 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2772 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2774 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2775 because it turns out to be too big or there is a timeout) there is no
2776 "Completed" line in the log. When some messages of this type were
2777 selected by exigrep, they were listed as "not completed". Others were
2778 picked up by some special patterns. I have improved the selection
2779 criteria to be more general.
2781 PH/38 The host_find_failed option in the manualroute router can now be set
2782 to "ignore", to completely ignore a host whose IP address cannot be
2783 found. If all hosts are ignored, the behaviour is controlled by the new
2784 host_all_ignored option.
2786 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2787 homing or because of multiple MX records with /mx) generated more than
2788 one IP address, and the following item turned out to be the local host,
2789 all the secondary addresses of the first item were incorrectly removed
2790 from the list, along with the local host and any following hosts (which
2791 is what is supposed to happen).
2793 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2794 whoever called Exim into the -H file. In the case of the daemon it was
2795 behaving confusingly. When first started, it used values for whoever
2796 started the daemon, but after a SIGHUP it used the Exim user (because it
2797 calls itself on a restart). I have changed the code so that it now always
2800 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2801 message are rejected with the same error (e.g. no authentication or bad
2802 sender address), and a DATA command is nevertheless sent (as can happen
2803 with PIPELINING or a stupid MUA), the error message that was given to the
2804 RCPT commands is included in the rejection of the DATA command. This is
2805 intended to be helpful for MUAs that show only the final error to their
2808 PH/42 Another patch from the Sieve maintainer.
2810 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2811 Eximstats - Fixed some broken HTML links and added missing column headers
2813 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2814 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2816 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2818 PH/43 Yet another patch from the Sieve maintainer.
2820 PH/44 I found a way to check for a TCP/IP connection going away before sending
2821 the response to the final '.' that terminates a message, but only in the
2822 case where the client has not sent further data following the '.'
2823 (unfortunately, this is allowed). However, in many cases there won't be
2824 any further data because there won't be any more messages to send. A call
2825 to select() can be used: if it shows that the input is "ready", there is
2826 either input waiting, or the socket has been closed. An attempt to read
2827 the next input character can distinguish the two cases. Previously, Exim
2828 would have sent an OK response which the client would never have see.
2829 This could lead to message repetition. This fix should cure that, at
2830 least in a lot of common cases.
2832 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2833 advertised in response to EHLO.
2839 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2840 fixed by 4.65/MH/01 (is this a record?) are fixed:
2842 (i) An empty string was always treated as zero by the numeric comparison
2843 operators. This behaviour has been restored.
2845 (ii) It is documented that the numeric comparison operators always treat
2846 their arguments as decimal numbers. This was broken in that numbers
2847 starting with 0 were being interpreted as octal.
2849 While fixing these problems I realized that there was another issue that
2850 hadn't been noticed. Values of message_size_limit (both the global option
2851 and the transport option) were treated as octal if they started with 0.
2852 The documentation was vague. These values are now always treated as
2853 decimal, and I will make that clear in the documentation.
2859 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2860 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2863 MH/01 Don't check that the operands of numeric comparison operators are
2864 integers when their expansion is in "skipping" mode (fixes bug
2865 introduced by 4.64-PH/07).
2867 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2868 child addresses, Exim now panics and dies. Previously, because the count
2869 is held in a short int, deliveries were likely to be lost. As such a
2870 large number of recipients for a single message is ridiculous
2871 (performance will be very, very poor), I have chosen to impose a limit
2872 rather than extend the field.
2878 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2879 leftover -K file (the existence of which was triggered by #402).
2880 While we were at it, introduced process PID as part of the -K
2881 filename. This should rule out race conditions when creating
2884 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2885 processing considerably. Previous code took too long for large mails,
2886 triggering a timeout which in turn triggers #401.
2888 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2889 in the DK code in transports.c. sendfile() is not really portable,
2890 hence the _LINUX specificness.
2892 TF/01 In the add_headers option to the mail command in an Exim filter,
2893 there was a bug that Exim would claim a syntax error in any
2894 header after the first one which had an odd number of characters
2897 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2898 callout verification, Exim cached a "reject" for the entire domain. This
2899 is correct for most verifications, but it is not correct for a recipient
2900 verification with use_sender or use_postmaster set, because in that case
2901 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2902 case of MAIL FROM:<> rejection from other early rejections (e.g.
2903 rejection of HELO). When verifying a recipient using a non-null MAIL
2904 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2905 Whatever the result of the callout, the value of the domain cache is
2906 left unchanged (for any other kind of callout, getting as far as trying
2907 RCPT means that the domain itself is ok).
2909 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2912 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2913 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2914 session, the daemon ignores ECONNECT errors and logs others; it now
2915 ignores EPIPE as well.
2917 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2918 (quoted-printable decoding).
2920 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2921 later the small subsequent patch to fix an introduced bug.
2923 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2925 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2927 PH/08 An error is now given if message_size_limit is specified negative.
2929 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2930 to be given (somewhat) arbitrary names.
2932 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2935 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2936 miscellaneous code fixes
2938 PH/10 Added the log_reject_target ACL modifier to specify where to log
2941 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2942 hostname. This is wrong, because it relates to the incoming message (and
2943 probably the interface on which it is arriving) and not to the outgoing
2944 callout (which could be using a different interface). This has been
2945 changed to use the value of the helo_data option from the smtp transport
2946 instead - this is what is used when a message is actually being sent. If
2947 there is no remote transport (possible with a router that sets up host
2948 addresses), $smtp_active_hostname is used.
2950 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2951 tweaks were necessary in order to get it to work (see also 21 below):
2952 (a) The code assumed that strncpy() returns a negative number on buffer
2953 overflow, which isn't the case. Replaced with Exim's string_format()
2955 (b) There were several signed/unsigned issues. I just did the minimum
2956 hacking in of casts. There is scope for a larger refactoring.
2957 (c) The code used strcasecmp() which is not a standard C function.
2958 Replaced with Exim's strcmpic() function.
2959 (d) The code set only $1; it now sets $auth1 as well.
2960 (e) A simple test gave the error "authentication client didn't specify
2961 service in request". It would seem that Dovecot has changed its
2962 interface. Fortunately there's a specification; I followed it and
2963 changed what the client sends and it appears to be working now.
2965 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2968 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2969 address A is aliased to B and C, where B exists and C does not. Without
2970 -v the output is "A verified" because verification stops after a
2971 successful redirection if more than one address is generated. However,
2972 with -v the child addresses are also verified. Exim was outputting "A
2973 failed to verify" and then showing the successful verification for C,
2974 with its parentage. It now outputs "B failed to verify", showing B's
2975 parentage before showing the successful verification of C.
2977 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2978 look up a TXT record in a specific list after matching in a combined
2981 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2982 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2983 they consult the DNS. I had assumed they would set it the way they
2984 wanted; and indeed my experiments on Linux seem to show that in some
2985 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2986 To be on the safe side, however, I have now made the interface to
2987 host_find_byname() similar to host_find_bydns(), with an argument
2988 containing the DNS resolver options. The host_find_byname() function now
2989 sets these options at its start, just as host_find_bydns() does. The smtp
2990 transport options dns_qualify_single and dns_search_parents are passed to
2991 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2992 of host_find_byname() use the default settings of RES_DEFNAMES
2993 (qualify_single) but not RES_DNSRCH (search_parents).
2995 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2996 spool_read_header() do less string testing, by means of a preliminary
2997 switch on the second character of optional "-foo" lines. (This is
2998 overdue, caused by the large number of possibilities that now exist.
2999 Originally there were few.) While I was there, I also converted the
3000 str(n)cmp tests so they don't re-test the leading "-" and the first
3001 character, in the hope this might squeeze out yet more improvement.
3003 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3004 flag allowing group syntax was set by the header_syntax check but not
3005 turned off, possible causing trouble later; (2) The flag was not being
3006 set at all for the header_verify test, causing "group"-style headers to
3007 be rejected. I have now set it in this case, and also caused header_
3008 verify to ignore an empty address taken from a group. While doing this, I
3009 came across some other cases where the code for allowing group syntax
3010 while scanning a header line wasn't quite right (mostly, not resetting
3011 the flag correctly in the right place). These bugs could have caused
3012 trouble for malformed header lines. I hope it is now all correct.
3014 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3015 with the "reply" argument non-NULL. The code, however (which originally
3016 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3017 but it didn't always do it. This confused somebody who was copying the
3018 code for some other use. I have removed all the tests.
3020 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3021 feature that was used to support insecure browsers during the U.S. crypto
3022 embargo. It requires special client support, and Exim is probably the
3023 only MTA that supported it -- and would never use it because real RSA is
3024 always available. This code has been removed, because it had the bad
3025 effect of slowing Exim down by computing (never used) parameters for the
3026 RSA_EXPORT functionality.
3028 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3029 authenticator to fail if there's a tab character in the incoming data
3030 (there should never be unless someone is messing about, as it's supposed
3031 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3032 if the connection is using TLS or if the remote IP is the same as the
3033 local IP, and the "valid-client-cert option" if a client certificate has
3036 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3037 authenticators. This can be used for authorization after authentication
3038 succeeds. (In the case of plaintext, it servers for both authentication
3041 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3042 if any retry times were supplied.
3044 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3045 connection, where there is no client IP address to check. In this
3046 situation, the verify now always succeeds.
3048 PH/25 Applied John Jetmore's -Mset patch.
3050 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3052 PH/27 In a string expansion for a processed (not raw) header when multiple
3053 headers of the same name were present, leading whitespace was being
3054 removed from all of them, but trailing whitespace was being removed only
3055 from the last one. Now trailing whitespace is removed from each header
3056 before concatenation. Completely empty headers in a concatenation (as
3057 before) are ignored.
3059 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3060 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3062 PH/29 [Removed. This was a change that I later backed out, and forgot to
3063 correct the ChangeLog entry (that I had efficiently created) before
3064 committing the later change.]
3066 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3067 address errors (4xx response to RCPT) over the same connection as other
3068 messages routed to the same hosts. Such deliveries are always "forced",
3069 so retry times are not inspected. This resulted in far too many retries
3070 for the affected addresses. The effect occurred only when there were more
3071 hosts than the hosts_max_try setting in the smtp transport when it had
3072 the 4xx errors. Those hosts that it had tried were not added to the list
3073 of hosts for which the message was waiting, so if all were tried, there
3074 was no problem. Two fixes have been applied:
3076 (i) If there are any address or message errors in an SMTP delivery, none
3077 of the hosts (tried or untried) are now added to the list of hosts
3078 for which the message is waiting, so the message should not be a
3079 candidate for sending over the same connection that was used for a
3080 successful delivery of some other message. This seems entirely
3081 reasonable: after all the message is NOT "waiting for some host".
3082 This is so "obvious" that I'm not sure why it wasn't done
3083 previously. Hope I haven't missed anything, but it can't do any
3084 harm, as the worst effect is to miss an optimization.
3086 (ii) If, despite (i), such a delivery is accidentally attempted, the
3087 routing retry time is respected, so at least it doesn't keep
3088 hammering the server.
3090 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3091 in ${readsocket because some servers need this prod.
3093 PH/32 Added some extra debug output when updating a wait-xxx database.
3095 PH/33 The hint "could be header name not terminated by colon", which has been
3096 given for certain expansion errors for a long time, was not being given
3097 for the ${if def:h_colon_omitted{... case.
3099 PH/34 The spec says: "With one important exception, whenever a domain list is
3100 being scanned, $domain contains the subject domain." There was at least
3101 one case where this was not true.
3103 PH/35 The error "getsockname() failed: connection reset by peer" was being
3104 written to the panic log as well as the main log, but it isn't really
3105 panic-worthy as it just means the connection died rather early on. I have
3106 removed the panic log writing for the ECONNRESET error when getsockname()
3109 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3110 runs only) independently of the message's sender address. This meant
3111 that, if the 4xx error was in fact related to the sender, a different
3112 message to the same recipient with a different sender could confuse
3113 things. In particular, this can happen when sending to a greylisting
3114 server, but other circumstances could also provoke similar problems.
3115 I have changed the default so that the retry time for these errors is now
3116 based a combination of the sender and recipient addresses. This change
3117 can be overridden by setting address_retry_include_sender=false in the
3120 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3121 remote server are returned as part of bounce messages. This was not
3122 happening for LMTP over a pipe (the lmtp transport), but now it is the
3123 same for both kinds of LMTP.
3125 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3126 in header lines that were in fact CNAMEs. This is no longer the case.
3128 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3129 and queue runs started by the daemon processed all messages. This has
3130 been fixed so that -R and -S can now usefully be given with -q<time>.
3132 PH/40 Import PCRE release 6.7 (fixes some bugs).
3134 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3136 PH/42 Give an error if -q is specified more than once.
3138 PH/43 Renamed the variables $interface_address and $interface_port as
3139 $received_ip_address and $received_port, to make it clear that these
3140 values apply to message reception, and not to the outgoing interface when
3141 a message is delivered. (The old names remain recognized, of course.)
3143 PH/44 There was no timeout on the connect() call when using a Unix domain
3144 socket in the ${readsocket expansion. There now is.
3146 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3147 be meaningful with "accept".
3149 SC/01 Eximstats V1.43
3150 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3152 SC/02 Eximstats V1.44
3153 Use a glob alias rather than an array ref in the generated
3154 parser. This improves both readability and performance.
3156 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3157 Collect SpamAssassin and rejection statistics.
3158 Don't display local sender or destination tables unless
3159 there is data to show.
3160 Added average volumes into the top table text output.
3162 SC/04 Eximstats V1.46
3163 Collect data on the number of addresses (recipients)
3164 as well as the number of messages.
3166 SC/05 Eximstats V1.47
3167 Added 'Message too big' to the list of mail rejection
3168 reasons (thanks to Marco Gaiarin).
3170 SC/06 Eximstats V1.48
3171 Mainlog lines which have GMT offsets and are too short to
3172 have a flag are now skipped.
3174 SC/07 Eximstats V1.49 (Alain Williams)
3175 Added the -emptyok flag.
3177 SC/08 Eximstats V1.50
3178 Fixes for obtaining the IP address from reject messages.
3180 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3181 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3182 whitespace changes from 4.64-PH/27
3184 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3187 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3188 are found, allow negative numbers in numeric criteria)
3190 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3192 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3193 to match changes made in 4.64-PH/43
3195 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3197 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3198 "domain" is actually an IP address, and force a failure. This locks out
3199 those revolvers/nameservers that support "A-for-A" lookups, in
3200 contravention of the specifications.
3202 PH/48 When a host name was looked up from an IP address, and the subsequent
3203 forward lookup of the name timed out, the host name was left in
3204 $sender_host_name, contrary to the specification.
3206 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3207 restricted to single-key lookups, Exim was not diagnosing an error if
3208 * or *@ was used with a query-style lookup.
3210 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3212 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3213 long ago, but noone interested enough thought of it. Let's just say that
3214 the "1.1" means that there are some new functions that weren't there at
3215 some point in the past.
3217 PH/51 Error processing for expansion failure of helo_data from an smtp
3218 transport during callout processing was broken.
3220 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3221 tested/used via the -bh/-bhc/-bs options.
3223 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3224 bug, fixed in subsequent PCRE releases).
3226 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3227 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3229 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3235 SC/01 Use a glob alias rather than an array ref in eximstats generated
3236 parser. This improves both readability and performance.
3238 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3239 Don't display local sender or destination tables in eximstats unless
3240 there is data to show.
3241 Added average volumes into the eximstats top table text output.
3243 SC/03 Collect data on the number of addresses (recipients) as well
3244 as the number of messages in eximstats.
3246 TF/01 Correct an error in the documentation for the redirect router. Exim
3247 does (usually) call initgroups() when daemonizing.
3249 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3250 with consistent privilege compared to when running as a daemon.
3252 TF/03 Note in the spec that $authenticated_id is not set for local
3253 submissions from trusted users.
3255 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3256 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3258 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3259 by adding some example configuration directives to the default
3260 configuration file. A little bit of work is required to uncomment the
3261 directives and define how usernames and passwords are checked, but
3262 there is now a framework to start from.
3264 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3265 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3266 without this. I don't know how relevant this is to other LDAP libraries.
3268 PH/02 Add the verb name to the "unknown ACL verb" error.
3270 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3272 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3274 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3275 directory not expanded when it should be if an expanded home directory
3276 was set for the address (which is overridden by the transport).
3278 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3281 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3282 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3283 because it is too late at that time, and has no effect.
3285 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3286 security issue with \' (bugzilla #107). I could not use the
3287 PQescapeStringConn() function, because it needs a PGconn value as one of
3290 PH/08 When testing addresses using -bt, indicate those final addresses that
3291 are duplicates that would not cause an additional delivery. At least one
3292 person was confused, thinking that -bt output corresponded to deliveries.
3293 (Suppressing duplicates isn't a good idea as you lose the information
3294 about possibly different redirections that led to the duplicates.)
3296 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3297 systems where poll() doesn't work, in particular OS X.
3299 PH/10 Added more information to debugging output for retry time not reached.
3301 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3302 operations in malware.c.
3304 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3307 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3308 syslog_duplication set false, log lines that would normally be written
3309 both the the main log and to the reject log were not written to syslog at
3312 PH/14 In the default configuration, change the use of "message" in ACL warn
3313 statements to "add_header".
3315 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3316 not followed by a command (e.g. "seen endif").
3318 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3319 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3322 PH/17 Added extra conditions to the default value of delay_warning_condition
3326 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3327 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3328 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3331 The Auto-Submitted: and various List- headers are standardised, whereas I
3332 don't think Precedence: ever was.
3334 PH/18 Refactored debugging code in route_finduser() to show more information,
3335 in particular, the error code if getpwnam() issues one.
3337 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3338 This is apparently needed in addition to the PH/07 change above to avoid
3339 any possible encoding problems.
3341 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3342 but not after initializing Perl.
3344 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3345 output them only if debugging. By default they are written stderr,
3346 apparently, which is not desirable.
3348 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3351 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3354 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3356 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3357 authenticated or an ident call has been made. Suppress the default
3358 values for $authenticated_id and $authenticated_sender (but permit -oMai
3359 and -oMas) when testing with -bh.
3361 PH/24 Re-jigged the order of the tests in the default configuration so that the
3362 tests for valid domains and recipients precede the DNS black list and CSA
3363 tests, on the grounds that those ones are more expensive.
3365 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3366 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3367 This bug exists in every version of Exim that I still have, right back to
3370 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3371 However, an attempt to turn on case-sensitivity in a regex key by
3372 including (?-i) didn't work because the subject string was already
3373 lowercased, and the effects were non-intuitive. It turns out that a
3374 one-line patch can be used to allow (?-i) to work as expected.
3380 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3381 other effects) broke the use of negated acl sub-conditions.
3383 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3386 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3387 "Deny" causes Exim to reject the incoming connection with a 554 error.
3388 Unfortunately, if there is a major crisis, such as a disk failure,
3389 tcp-wrappers gives "deny", whereas what one would like would be some
3390 kind of temporary error. A kludge has been added to help with this.
3391 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3392 554 error is used if errno is still zero or contains ENOENT (which occurs
3393 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3396 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3398 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3399 errors. Otherwise a message that provokes a temporary error (when other
3400 messages do not) can cause a whole host to time out.
3402 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3403 addresses were routed directly to files or pipes from a redirect router.
3404 File deliveries just didn't batch; pipe deliveries might have suffered
3407 PH/06 A failure to get a lock for a hints database would erroneously always say
3408 "Failed to get write lock", even when it was really a read lock.
3410 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3411 of 0600. This has been changed to use the value of the lockfile_mode
3412 option (which defaults to 0600).
3414 PH/08 Applied small patch from the Sieve maintainer.
3416 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3417 folder from quota calculations, a direct delivery into this folder messed
3418 up the contents of the maildirsize file. This was because the regex was
3419 used only to exclude .Trash (or whatever) when the size of the mailbox
3420 was calculated. There was no check that a delivery was happening into an
3421 excluded directory. This bug has been fixed by ignoring all quota
3422 processing for deliveries into excluded directories.
3424 PH/10 Added the maildirfolder_create_regex option to appendfile.
3430 PH/01 The code for finding all the local interface addresses on a FreeBSD
3431 system running IPv6 was broken. This may well have applied to all BSD
3432 systems, as well as to others that have similar system calls. The broken
3433 code found IPv4 interfaces correctly, but gave incorrect values for the
3434 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3435 that it would not match correctly against @[] and not recognize the IPv6
3438 PH/02 The ipliteral router was not recognizing addresses of the form user@
3439 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3441 PH/03 Added disable_ipv6.
3443 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3444 decoded form, because it is most often used to construct To: headers
3445 lines in autoreplies, and the decoded form may well be syntactically
3446 invalid. However, $reply_address has leading white space removed, and all
3447 newlines turned into spaces so that the autoreply transport does not
3450 PH/05 If group was specified without a user on a router, and no group or user
3451 was specified on a transport, the group from the router was ignored.
3453 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3454 for visible compile-time settings that can be used to change these
3455 numbers, for those that want even more. Backwards compatibility with old
3456 spool files has been maintained. However, going back to a previous Exim
3457 release will lost any variables that are in spool files.
3459 PH/07 Two small changes when running in the test harness: increase delay when
3460 passing a TCP/IP connection to a new process, in case the original
3461 process has to generate a bounce, and remove special handling of
3462 127.0.0.2 (sic), which is no longer necessary.
3464 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3465 be the same on different OS.
3467 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3470 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3471 whether --show-vars was specified or not
3473 JJ/02 exipick: Added support for new ACL variable spool format introduced
3476 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3477 syntactically invalid From: or Reply-to: line, and a filter used this to
3478 generate an autoreply, and therefore failed to obtain an address for the
3479 autoreply, Exim could try to deliver to a non-existent relative file
3480 name, causing unrelated and misleading errors. What now happens is that
3481 it logs this as a hard delivery error, but does not attempt to create a
3484 PH/11 The exinext utility has a -C option for testing purposes, but although
3485 the given file was scanned by exinext itself; it wasn't being passed on
3486 when Exim was called.
3488 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3489 an end-of-file indication when reading a command response.
3491 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3492 compiled. In many other places in Exim, IPv6 addresses are always
3493 recognized, so I have changed this. It also means that IPv4 domain
3494 literals of the form [IPV4:n.n.n.n] are now always recognized.
3496 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3497 used if the router is not running as root, for example, when verifying at
3498 ACL time, or when using -bh. The debugging output from this situation was
3499 non-existent - all you got was a failure to exec. I have made two
3502 (a) Failures to set uid/gid, the current directory, or a process leader
3503 in a subprocess such as that created by queryprogram now generate
3504 suitable debugging output when -d is set.
3506 (b) The queryprogram router detects when it is not running as root,
3507 outputs suitable debugging information if -d is set, and then runs
3508 the subprocess without attempting to change uid/gid.
3510 PH/15 Minor change to Makefile for building test_host (undocumented testing
3513 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3514 additional section of a DNS packet that returns MX or SRV records.
3515 Instead, it always explicitly searches for A/AAAA records. This avoids
3516 major problems that occur when a DNS server includes only records of one
3517 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3518 fixed another bug: if SRV records were looked up and the corresponding
3519 address records were *not* found in the additional section, the port
3520 values from the SRV records were lost.
3522 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3523 using the correct key (the original address) when searching the retry
3524 rules in order to find which one to use for generating the retry hint.
3526 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3527 adding the default one. Similarly, if it contains a Reply-To: header, the
3528 errors_reply_to option, if set, is not used.
3530 PH/19 When calculating a retry time, Exim used to measure the "time since
3531 failure" by looking at the "first failed" field in the retry record. Now
3532 it does not use this if it is later than than the arrival time of the
3533 message. Instead it uses the arrival time. This makes for better
3534 behaviour in cases where some deliveries succeed, thus re-setting the
3535 "first failed" field. An example is a quota failure for a huge message
3536 when small messages continue to be delivered. Without this change, the
3537 "time since failure" will always be short, possible causing more frequent
3538 delivery attempts for the huge message than are intended.
3539 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3541 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3542 $1, $2, $3) because the numerical variables can be reset during some
3543 expansion items (e.g. "match"), thereby losing the authentication data.
3545 PH/21 Make -bV show the size of off_t variables so that the test suite can
3546 decide whether to run tests for quotas > 2G.
3548 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3549 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3550 filecount value is greater than 2G or if a quota value is greater than 2G
3551 on a system where the size of off_t is not greater than 4, a panic error
3554 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3555 never match. The debug and -bh output now contains an explicit error
3556 message indicating a malformed IPv4 address or mask.
3558 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3559 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3560 PH/23 above applies.
3562 PH/25 Do not write to syslog when running in the test harness. The only
3563 occasion when this arises is a failure to open the main or panic logs
3564 (for which there is an explicit test).
3566 PH/26 Added the /no_tell option to "control=freeze".
3568 PH/27 If a host name lookup failed very early in a connection, for example, if
3569 the IP address matched host_lookup and the reverse lookup yielded a name
3570 that did not have a forward lookup, an error message of the form "no IP
3571 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3572 could be logged. Now it outputs the IP address instead of "NULL".
3574 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3575 allows the sender and the authenticated sender to be set when
3576 submitting a message from within Exim. Since child_open_exim() is
3577 documented for local_scan(), the new function should be too.
3579 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3580 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3581 results in an empty string is now treated as unset.
3583 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3585 PH/31 Added sender_verify_fail logging option.
3587 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3588 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3589 tidied the source and removed it altogether.
3591 PH/33 When a queue run was abandoned because the load average was too high, a
3592 log line was always written; now it is written only if the queue_run log
3593 selector is set. In addition, the log line for abandonment now contains
3594 information about the queue run such as the pid. This is always present
3595 in "start" and "stop" lines but was omitted from the "abandon" line.
3597 PH/34 Omit spaces between a header name and the colon in the error message that
3598 is given when verify = headers_syntax fails (if there are lots of them,
3599 the message gets confusing).
3601 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3602 names, as there are now some PTR records that contain slashes. This check
3603 is only to protect against broken name servers that fall over on strange
3604 characters, so the fact that it applies to all lookups doesn't matter.
3606 PH/36 Now that the new test suite is complete, we can remove some of the
3607 special code in Exim that was needed for the old test suite. For example,
3608 sorting DNS records because real resolvers return them in an arbitrary
3609 order. The new test suite's fake resolver always returns records in the
3612 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3613 bounces) except when queue_only is set, to avoid logging races between
3614 the different processes.
3616 PH/38 Panic-die if .include specifies a non-absolute path.
3618 PH/39 A tweak to the "H" retry rule from its user.
3620 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3621 a label. They prevented compilation on older perls.
3623 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3624 a warning to be raised on newish perls.
3626 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3627 on queue. Changes to match documented behaviour of showing count of
3628 messages matching specified criteria.
3630 PH/40 Changed the default ident timeout from 30s to 5s.
3632 PH/41 Added support for the use of login_cap features, on those BSD systems
3633 that have them, for controlling the resources used by pipe deliveries.
3635 PH/42 The content-scanning code uses fopen() to create files in which to put
3636 message data. Previously it was not paying any attention to the mode of
3637 the files. Exim runs with umask(0) because the rest of the code creates
3638 files with open(), and sets the required mode explicitly. Thus, these
3639 files were ending up world-writeable. This was not a big issue, because,
3640 being within the spool directory, they were not world-accessible. I have
3641 created a function called modefopen, which takes an additional mode
3642 argument. It sets umask(777), creates the file, chmods it to the required
3643 mode, then resets the umask. All the relevant calls to fopen() in the
3644 content scanning code have been changed to use this function.
3646 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3647 to 24 hours. This avoids potential overflow problems when processing G
3648 and H retry rules. I suspect nobody ever tinkers with this value.
3650 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3652 PH/45 When the plaintext authenticator is running as a client, the server's
3653 challenges are checked to ensure they are valid base64 strings. By
3654 default, the authentication attempt is cancelled if an invalid string is
3655 received. Setting client_ignore_invalid_base64 true ignores these errors.
3656 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3657 they are received. Thus, the responses can be made to depend on the
3658 challenges. If an invalid string is ignored, an empty string is placed in
3661 PH/46 Messages that are created by the autoreply transport now contains a
3662 References: header, in accordance with RFCs 2822 and 3834.
3664 PH/47 Added authenticated_sender_force to the smtp transport.
3666 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3668 PH/49 Installed latest patch from the Sieve maintainer.
3670 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3671 was also set, the appendfile transport was unnecessarily scanning a
3672 directory of message files (e.g. for maildir delivery) to find the count
3673 of files (along with the size), even though it did not need this
3674 information. It now does the scan only if it needs to find either the
3675 size of the count of files.
3677 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3679 PH/52 Two bugs concerned with error handling when the smtp transport is
3682 (i) Exim was not creating retry information for temporary errors given
3683 for individual recipients after the DATA command when the smtp transport
3684 was used in LMTP mode. This meant that they could be retried too
3685 frequently, and not timed out correctly.
3687 (ii) Exim was setting the flag that allows error details to be returned
3688 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3689 recipients that were returned after the DATA command.
3691 PH/53 This is related to PH/52, but is more general: for any failing address,
3692 when detailed error information was permitted to be returned to the
3693 sender, but the error was temporary, then after the final timeout, only
3694 "retry timeout exceeded" was returned. Now it returns the full error as
3695 well as "retry timeout exceeded".
3697 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3698 do this, and (what is worse) MTAs that accept it.
3700 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3701 will now be deprecated.
3703 PH/56 New os.c-cygwin from the Cygwin maintainer.
3705 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3706 formats (previously only available in exim formats via -bpr, -bpru,
3707 and -bpra. Now also available in native and exiqgrep formats)
3709 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3710 with very large, slow to parse queues
3712 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3714 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3716 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3717 responses to authentication challenges, though it was showing the
3718 challenges; (ii) I've removed the CR characters from the debug output for
3721 PH/58 Allow for the insertion of a newline as well as a space when a string
3722 is turned into more than one encoded-word during RFC 2047 encoding. The
3723 Sieve code now uses this.
3725 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3726 data_4xx, lost_connection, tls_required.
3728 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3729 message was being sent as an SMTP response.
3731 PH/61 Add -l and -k options to exicyclog.
3733 PH/62 When verifying, if an address was redirected to one new address, so that
3734 verification continued, and the new address failed or deferred after
3735 having set something in $address_data, the value of $address_data was not
3736 passed back to the ACL. This was different to the case when no
3737 redirection occurred. The value is now passed back in both cases.
3739 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3740 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3741 use login_cap.h, so on its own it isn't the distinguishing feature. The
3742 new name refers directly to the setclassresources() function.
3744 PH/65 Added configuration files for NetBSD3.
3746 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3748 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3749 is preferred over IPv4.
3751 PH/68 The bounce_return_message and bounce_return_body options were not being
3752 honoured for bounces generated during the reception of non-SMTP messages.
3753 In particular, this applied to messages rejected by the ACL. This bug has
3754 been fixed. However, if bounce_return_message is true and bounce_return_
3755 body is false, the headers that are returned for a non-SMTP message
3756 include only those that have been read before the error was detected.
3757 (In the case of an ACL rejection, they have all been read.)
3759 PH/69 The HTML version of the specification is now built in a directory called
3760 spec_html instead of spec.html, because the latter looks like a path with
3761 a MIME-type, and this confuses some software.
3763 PH/70 Catch two compiler warnings in sieve.c.
3765 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3766 function verify_get_ident() calls ip_connect() to connect a socket, but
3767 if the "connect()" function timed out, ip_connect() used to close the
3768 socket. However, verify_get_ident() also closes the socket later, and in
3769 between Exim writes to the log, which may get opened at this point. When
3770 the socket was closed in ip_connect(), the log could get the same file
3771 descriptor number as the socket. This naturally causes chaos. The fix is
3772 not to close the socket in ip_connect(); the socket should be closed by
3773 the function that creates it. There was only one place in the code where
3774 this was missing, in the iplookup router, which I don't think anybody now
3775 uses, but I've fixed it anyway.
3777 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3778 well as to direct DNS lookups. Otherwise the handling of names in host
3779 lists is inconsistent and therefore confusing.
3785 PH/01 Two changes to the default runtime configuration:
3787 (1) Move the checks for relay_from_hosts and authenticated clients from
3788 after to before the (commented out) DNS black list checks.
3790 (2) Add control=submission to the relay_from_hosts and authenticated
3791 clients checks, on the grounds that messages accepted by these
3792 statements are most likely to be submissions.
3794 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3796 (1) Generate an error if the third argument for the ${prvs expansion is
3799 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3802 (3) Reset the variables that are obtained from the first argument of
3803 ${prvscheck and used in the second argument before leaving the code,
3804 because their memory is reclaimed, so using them afterwards may do
3807 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3808 one (it's much easier than Tom thought :-).
3810 (5) Because of (4), we can now allow for the use of $prvscheck_result
3811 inside the third argument.
3813 PH/03 For some reason, the default setting of PATH when running a command from
3814 a pipe transport was just "/usr/bin". I have changed it to
3817 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3818 anything to be listed in the output from -bV.
3820 PH/05 When a filter generated an autoreply, the entire To: header line was
3821 quoted in the delivery log line, like this:
3823 => >A.N.Other <ano@some.domain> <original@ddress> ...
3825 This has been changed so that it extracts the operative address. There
3826 may be more than one such address. If so, they are comma-separated, like
3829 => >ano@some.domain,ona@other.domain <original@ddress> ...
3831 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3832 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3833 not being looked up in the rDNS to get a host name, Exim was showing the
3834 IP address twice in Received: lines, even though the IP addresses were
3835 identical. For example:
3837 Received: from [1.2.3.4] (helo=[1.2.3.4])
3839 However, if the real host name was known, it was omitting the HELO data
3840 if it matched the actual IP address. This has been tidied up so that it
3841 doesn't show the same IP address twice.
3843 PH/07 When both +timestamp and +memory debugging was on, the value given by
3844 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3845 called by the debug printing, thereby overwriting the timestamp buffer.
3846 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3848 PH/08 When the original message was included in an autoreply transport, it
3849 always said "this is a copy of the message, including all the headers",
3850 even if body_only or headers_only was set. It now gives an appropriate
3853 PH/09 Applied a patch from the Sieve maintainer which:
3855 o fixes some comments
3856 o adds the (disabled) notify extension core
3857 o adds some debug output for the result of if/elsif tests
3858 o points to the current vacation draft in the documentation
3859 and documents the missing references header update
3863 o fixes a bug in processing the envelope test (when testing
3864 multiple envelope elements, the last element determined the
3867 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3868 Electronic Mail") by including:
3870 Auto-submitted: auto-generated
3872 in the messages that it generates (bounce messages and others, such as
3873 warnings). In the case of bounce messages for non-SMTP messages, there was
3874 also a typo: it was using "Auto_submitted" (underscore instead of
3875 hyphen). Since every message generated by Exim is necessarily in response
3876 to another message, thes have all been changed to:
3878 Auto-Submitted: auto-replied
3880 in accordance with these statements in the RFC:
3882 The auto-replied keyword:
3884 - SHOULD be used on messages sent in direct response to another
3885 message by an automatic process,
3887 - MUST NOT be used on manually-generated messages,
3889 - MAY be used on Delivery Status Notifications (DSNs) and Message
3890 Disposition Notifications (MDNs),
3892 - MUST NOT be used on messages generated by automatic or periodic
3893 processes, except for messages which are automatic responses to
3896 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3897 to the default Received: header definition.
3899 PH/12 Added log selector acl_warn_skipped (default on).
3901 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3902 variables because (a) they are in the wrong storage pool and (b) even if
3903 they were copied, it wouldn't work properly because of the caching.
3905 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3906 checking when decoding. Apparently there are clients that generate
3907 overlong encoded strings. Why am I not surprised?
3909 PH/15 If the first argument of "${if match_address" was not empty, but did not
3910 contain an "@" character, Exim crashed. Now it writes a panic log message
3911 and treats the condition as false.
3913 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3915 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3916 extension "envelope-auth". The code is finished and in agreement with
3917 other implementations, but there is no documentation so far and in fact,
3918 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3919 not changing the active code.
3921 Print executed "if" and "elsif" statements when debugging is used. This
3922 helps a great deal to understand what a filter does.
3924 Document more things not specified clearly in RFC3028. I had all this
3925 sorted out, when out of a sudden new issues came to my mind. Oops."
3927 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3930 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3931 canonical form (as documented). However, after a host name lookup from
3932 the IP address, check_host() was doing a simple string comparison with
3933 addresses acquired from the DNS when checking that the found name did
3934 have the original IP as one of its addresses. Since any found IPv6
3935 addresses are likely to be in abbreviated form, the comparison could
3936 fail. Luckily, there already exists a function for doing the comparison
3937 by converting both addresses to binary, so now that is used instead of
3938 the text comparison.
3940 PH/20 There was another similar case to PH/19, when a complete host name was
3941 given in a host list; looking up its IP address could give an abbreviated
3942 form, whereas the current host's name might or might not be abbreviated.
3943 The same fix has been applied.
3949 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3950 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3953 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3954 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3956 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3958 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3959 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3960 Also, for "Auto-Submitted", treat anything other than "no" as
3961 non-personal, in accordance with RFC 3834. (Previously it treated
3962 anything starting "auto-" as non-personal.)
3964 TF/01 The control=submission/name=... option had a problem with syntax
3965 errors if the name included a slash character. The /name= option
3966 now slurps the rest of the string, so it can include any characters
3967 but it must come last in the list of options (after /sender_retain
3970 PH/05 Some modifications to the interface to the fake nameserver for the new
3978 TK/01 Added the "success_on_redirect" address verification option. See
3979 NewStuff for rationale and an example.
3981 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3983 PH/02 Patch to exigrep to allow it to work on syslog lines.
3985 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3986 fread() to skip over the body file's header line, because in Cygwin the
3987 header line is locked and is inaccessible.
3989 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3990 co-exist for some time) to make it clear that it is the Exim ID that is
3991 referenced, not the Message-ID: header line.
3993 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3994 string_format() function, because snprintf() does not exist on all
3997 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3998 ${stat: expansion item.
4000 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4001 protocol synchronization error", to keep the pedants happy.
4003 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4004 well as for IRIX systems, when gcc is being used. See the host.c source
4007 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4009 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4012 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4013 transport and to the smtp transport in LMTP mode.
4015 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4017 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4018 run a filter in a subprocess. This could lead to confusion in subsequent
4019 lookups in the parent process. There should also be a search_tidyup() at
4020 the end of the subprocess.
4022 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4023 only if the host matched helo_try_verify_hosts, which caused the
4024 verification to occur when the EHLO/HELO command was issued. The ACL just
4025 tested the remembered result. Now, if a previous verification attempt has
4026 not happened, "verify = helo" does it there and then.
4028 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4030 TK/03 Fix log output including CR from clamd.
4032 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4033 exist provoked a memory error which could cause a segfault.
4035 PH/15 Installed PCRE 6.2
4037 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4039 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4040 of the problem. Specifically, suggested +O2 rather than +O1 for the
4043 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4045 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4046 record, the port was not correctly logged when the outgoing_port log
4047 selector was set (it logged the transort's default port).
4049 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4050 fallback_hosts, and "hosts" in the smtp transport.
4052 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4053 host errors such as "Connection refused".
4055 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4056 authentication with radiusclient 0.4.9:
4058 - Error returned from rc_read_config was caught wrongly
4059 - Username/password not passed on to radius server due to wrong length.
4061 The presumption is that some radiusclient API changes for 4.51/PH/17
4062 were not taken care of correctly. The code is still untested by me (my
4063 Linux distribution still has 0.3.2 of radiusclient), but it was
4064 contributed by a Radius user.
4066 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4067 expanding the "port" option of the smtp transport.
4069 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4070 while reading a MIME header. Thanks to Tom Hughes for a patch.
4072 PH/24 Include config.h inside local_scan.h so that configuration settings are
4075 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4076 that in an ACL for RCPT (for example), you can examine exactly what was
4079 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4080 commands, but it was not correctly comparing the address with the actual
4081 client host address. Thus, it would show the EHLO address in Received:
4082 header lines when this was not necessary.
4084 PH/27 Added the % operator to ${eval:}.
4086 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4087 it should be ignoring failures (because with -C, for example, it has lost
4088 privilege). It wasn't ignoring creation failures other than "already
4091 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4094 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4095 because an input line was too long, either on its own, or by virtue of
4096 too many continuations, the temporary file was not being removed, and the
4097 return code was incorrect.
4099 PH/31 Missing "BOOL" in function definition in filtertest.c.
4101 PH/32 Applied Sieve patches from the maintainer.
4103 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4105 PH/33 Added "verify = not_blind".
4107 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4108 Local/Makefile (with some defaults set). These are used in built scripts
4109 such as exicyclog, but they have never been used in the exim_install
4110 script (though there are many overriding facilities there). I have
4111 arranged that the exim_install script now takes note of these two
4114 PH/35 Installed configuration files for Dragonfly.
4116 PH/36 When a locally submitted message by a trusted user did not contain a
4117 From: header, and the sender address was obtained from -f or from an SMTP
4118 MAIL command, and the trusted user did not use -F to supply a sender
4119 name, $originator_name was incorrectly used when constructing a From:
4120 header. Furthermore, $originator_name was used for submission mode
4121 messages from external hosts without From: headers in a similar way,
4122 which is clearly wrong.
4124 PH/37 Added control=suppress_local_fixups.
4126 PH/38 When log_selector = +received_sender was set, and the addition of the
4127 sender made the log line's construction buffer exactly full, or one byte
4128 less than full, an overflow happened when the terminating "\n" was
4131 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4132 when the result of a list match is failure because a DNS lookup failed.
4134 PH/40 RM_COMMAND is now used in the building process.
4136 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4137 the "build-* directories that it finds.
4139 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4140 address in a domain literal was a prefix of an interface address.
4142 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4143 when verifying a sender address, unless rewrite_headers is false.
4145 PH/44 Wrote a long comment about why errors_to addresses are verified as
4146 recipients, not senders.
4148 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4149 the ratelimit ACL was added.
4151 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4153 PH/46 Added extra information about PostgreSQL errors to the error string.
4155 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4156 avoiding the need to install special zones in a real server. This is
4157 backwards compatible; if it can't find the fake resolver, it drops back.
4158 Thus, both old and new test suites can be run.
4160 TF/02 Added util/ratelimit.pl
4162 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4163 clock is set back in time.
4165 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4166 Candler <B.Candler@pobox.com>.
4168 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4169 OK for addresses that are the result of redirections.
4171 PH/48 A number of further additions for the benefit of the new test suite,
4172 including a fake gethostbyname() that interfaces to the fake DNS resolver
4175 TF/06 The fix for widen_domains has also been applied to qualify_single and
4176 search_parents which are the other dnslookup options that can cause
4179 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4182 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4184 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4185 service" if it encountered an MX record with an empty target hostname.
4186 The message is now "an MX or SRV record indicated no SMTP service".
4188 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4189 if the DNS of the sending site is misconfigured. This is quite a
4190 common situation. This change restores the behaviour of treating a
4191 helo verification defer as a failure.
4193 PH/51 If self=fail was set on a router, the bounce message did not include the
4194 actual error message.
4200 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4202 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4203 command itself ended in error, the underlying message about the transport
4204 filter timeout was being overwritten with the pipe command error. Now the
4205 underlying error message should be appended to the second error message.
4207 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4209 PH/02 Reduce the amount of output that "make" produces by default. Full output
4210 can still be requested.
4212 PH/03 The warning log line about a condition test deferring for a "warn" verb
4213 was being output only once per connection, rather than after each
4214 occurrence (because it was using the same function as for successful
4215 "warn" verbs). This seems wrong, so I have changed it.
4217 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4218 it should not have, which might have caused a crash in the right
4219 circumstances, but probably never did.
4221 PH/04 Installed a modified version of Tony Finch's patch to make submission
4222 mode fix the return path as well as the Sender: header line, and to
4223 add a /name= option so that you can make the user's friendly name appear
4226 TF/03 Added the control = fakedefer ACL modifier.
4228 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4229 Mark Lowes for thorough testing.
4231 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4233 TK/03 Merged latest SRS patch from Miles Wilton.
4235 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4236 with the definition in sysexits.h (which is #included earlier).
4237 Fortunately, Exim does not actually use EX_OK. The code used to try to
4238 preserve the sysexits.h value, by assuming that macro definitions were
4239 scanned for macro replacements. I have been disabused of this notion,
4240 so now the code just undefines EX_OK before #including unistd.h.
4242 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4243 in the smtp transport. When a block could not be written in a single
4244 write() function, the timeout was being re-applied to each part-write.
4245 This seems wrong - if the receiver was accepting one byte at a time it
4246 would take for ever. The timeout is now adjusted when this happens. It
4247 doesn't have to be particularly precise.
4249 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4250 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4252 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4253 without a domain if the check to <postmaster@domain> fails.
4255 SC/01 Eximstats: added -xls and the ability to specify output files
4256 (patch written by Frank Heydlauf).
4258 SC/02 Eximstats: use FileHandles for outputting results.
4260 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4262 SC/04 Eximstats: fixed display of large numbers with -nvr option
4264 SC/05 Eximstats: fixed merging of reports with empty tables.
4266 SC/06 Eximstats: added the -include_original_destination flag
4268 SC/07 Eximstats: removed tabs and trailing whitespace.
4270 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4272 TK/06 MBOX spool code: Add real "From " MBOX separator line
4273 so the .eml file is really in mbox format (even though
4274 most programs do not really care). Patch from Alex Miller.
4276 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4277 The latter is generated from $received_to and is only set if the
4278 message has one envelope recipient. SA can use these headers,
4279 obviously out-of-the-box. Patch from Alex Miller.
4281 PH/08 The ${def test on a variable was returning false if the variable's
4282 value was "0", contrary to what the specification has always said!
4283 The result should be true unless the variable is empty.
4285 PH/09 The syntax error of a character other than { following "${if
4286 def:variable_name" (after optional whitespace) was not being diagnosed.
4287 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4288 accidental colon was present, for example, could give incorrect results.
4290 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4291 result is used (not including appendfile, where other changes are about
4294 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4295 This involved changing a lot of size variables from int to off_t. It
4296 should work with maildirs and everything.
4298 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4299 spamd dying while we are connected to it.
4301 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4304 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4305 function for BDB 4.3.
4307 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4309 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4310 the sources for PCRE have been re-arranged and more files are now
4313 PH/15 The code I had for printing potentially long long variables in PH/11
4314 above was not the best (it lost precision). The length of off_t variables
4315 is now inspected at build time, and an appropriate printing format (%ld
4316 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4317 to be "long long int" or "long int". This is needed for the internal
4318 formatting function string_vformat().
4320 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4321 the configuration file to be ":syslog", then the script "guesses" where
4322 the logs files are, rather than using the compiled in default. In our
4323 case the guess is not the same as the compiled default, so the script
4324 suddenly stopped working when I started to use syslog. The patch checks
4325 to see if log_file_path is "". If so, it attempts to read it from exim
4326 with no configuration file to get the compiled in version, before it
4327 falls back to the previous guessing code."
4329 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4330 implementing BATV in an Exim configuration. See NewStuff for the gory
4333 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4334 Makefile that are specific to HP-UX.
4336 PH/18 If the "use_postmaster" option was set for a recipient callout together
4337 with the "random" option, the postmaster address was used as the MAIL
4338 FROM address for the random test, but not for the subsequent recipient
4339 test. It is now used for both.
4341 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4342 patch removes a few documentation additions to RFC 3028, because the
4343 latest draft now contains them. It adds the new en;ascii-case comparator
4344 and a new error check for 8bit text in MIME parts. Comparator and
4345 require names are now matched exactly. I enabled the subaddress
4346 extension, but it is not well tested yet (read: it works for me)."
4348 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4349 rework some of the code of TK/09 above to avoid the hardwired use of
4350 "%lld" and "long long". Replaced the call to snprintf() with a call to
4353 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4354 records point to non-existent hosts", "retry timeout exceeded", and
4355 "retry time not reached for any host after a long failure period".
4357 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4358 experimental DomainKeys support:
4360 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4361 (2) On an error such as an illegally used "control", the wrong name for
4362 the control was given.
4364 These problems did NOT occur unless DomainKeys support was compiled.
4366 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4368 PH/24 Added ${if match_ip condition.
4370 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4371 databases so that it will be absolutely obvious if a crash occurs in the
4372 DB library. This is a regular occurrence (often caused by mis-matched
4375 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4376 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4377 picked up on a user's system that detects such things. There doesn't seem
4378 to be a gcc warning option for this - only an attribute that has to be
4379 put on the function's prototype. It seems that in Fedora Core 4 they have
4380 set this on a number of new functions. No doubt there will be more in due
4383 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4384 specify a transport. However, if an address that was verified by such a
4385 router was the subject of a callout, Exim crashed because it tried to
4386 read the rcpt_include_affixes from the non-existent transport. Now it
4387 just assumes that the setting of that option is false. This bug was
4388 introduced by 4.51/PH/31.
4390 PH/28 Changed -d+all to exclude +memory, because that information is very
4391 rarely of interest, but it makes the output a lot bigger. People tend to
4392 do -d+all out of habit.
4394 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4395 code in os-type was giving problems when libc.so lives in lib64, like on
4398 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4399 aren't the modern standard, and it seems that some systems' include files
4400 don't always have them. Exim was already checking for some of the newer
4401 ones like T_AAAA, and defining it itself. I've added checks for all the
4402 record types that Exim uses.
4404 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4405 not automatically generating a new one, as it is supposed to. This
4406 prevented TLS from working. If the file did exist, but contained invalid
4407 data, a new version was generated, as expected. It was only the case of a
4408 non-existent file that was broken.
4410 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4411 with a change in libdomainkeys > 0.64.
4413 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4414 from DNS. If the selector record carries the flag, it now has
4415 precedence over the domain-wide flag.
4417 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4419 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4420 the use of a port name that isn't defined in /etc/services) occurred, the
4421 message was deferred as in a normal delivery, and thus remained on the
4422 spool, instead of being failed because of the mua_wrapper setting. This
4423 is now fixed, and I tidied up some of the mua_wrapper messages at the
4426 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4427 the messages in a hash of arrays rather than using individual hashes.
4428 This is a bit cleaner and results in dramatic memory savings, albeit
4429 at a slight CPU cost.
4431 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4432 as requested by Marc Sherman.
4434 SC/10 Eximstats: added histograms for user specified patterns as requested
4437 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4439 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4440 fopen() in the content-scanning modules that did not already have it.
4446 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4447 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4449 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4451 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4453 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4454 to test Sieve filters that use "vacation".
4456 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4457 that changes the way the GnuTLS parameters are stored in the cache file.
4458 The new format can be generated externally. For backward compatibility,
4459 if the data in the cache doesn't make sense, Exim assumes it has read an
4460 old-format file, and it generates new data and writes a new file. This
4461 means that you can't go back to an older release without removing the
4464 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4465 work if there are any delivery delays because "one_time" forces the
4466 parent to be marked "delivered", so its unseen clone is never tried
4467 again. For this reason, Exim now forbids the simultaneous setting of
4470 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4471 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4472 entry if you want to know the details. The fix, however, neglected to
4473 consider the case when local delivery batching is involved. The test for
4474 "previously delivered" was not happening when checking to see if an
4475 address could be batched with a previous (undelivered) one; under
4476 certain circumstances this could lead to multiple deliveries to the same
4479 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4480 in its include files, and this causes problems building Exim.
4482 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4483 header_syntax) but Exim was just ignoring anything given after a slash.
4484 In particular, this caused confusion with an attempt to use "verify =
4485 reverse_host_lookup/defer_ok". An error is now given when options are
4486 supplied for verify items that do not have them. (Maybe reverse_host_
4487 lookup should have a defer_ok option, but that's a different point.)
4489 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4490 defined by RFC 821) to 2048, because there were problems with some AUTH
4491 commands, and RFC 1869 says the size should be increased for extended
4492 SMTP commands that take arguments.
4494 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4497 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4498 "unknown" error; now it says that the functionality isn't in the binary.
4500 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4501 an address' error message when a string expansion fails (syntax or
4502 whatever). Otherwise the password may appear in the log. Following change
4503 PH/42 below, there is no longer a chance of it appearing in a bounce
4506 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4508 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4509 of its addresses was ever tried. (Bugzilla bug #2.)
4511 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4512 the result incorrectly in the debug output. (It correctly added a newline
4513 to what was transported.)
4515 TF/01 Added $received_time.
4517 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4518 commented out examples of how to interface to a virus scanner and to
4519 SpamAssassin. Also added commented examples of av_scanner and
4520 spamd_address settings.
4522 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4523 and controls are allowed in which ACLs. There were a couple of minor
4524 errors. Some of the entries in the conditions table (which is a table of
4525 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4526 negation of where the condition IS allowed.
4528 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4530 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4531 header file does not have a version number, so I've had to invent a new
4532 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4533 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4534 radiusclient), but it was contributed by a Radius user.
4536 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4537 files or directories, for OpenSSL.
4539 PH/19 When an Exim process that is running as root has to create an Exim log
4540 file, it does so in a subprocess that runs as exim:exim so as to get the
4541 ownership right at creation (otherwise, other Exim processes might see
4542 the file with the wrong ownership). There was no test for failure of this
4543 fork() call, which would lead to the process getting stuck as it waited
4544 for a non-existent subprocess. Forks do occasionally fail when resources
4545 run out. I reviewed all the other calls to fork(); they all seem to check
4548 PH/20 When checking for unexpected SMTP input at connect time (before writing
4549 the banner), Exim was not dealing correctly with a non-positive return
4550 from the read() function. If the client had disconnected by this time,
4551 the result was a log entry for a synchronization error with an empty
4552 string after "input=" when read() returned zero. If read() returned -1
4553 (an event I could not check), uninitialized data bytes were printed.
4554 There were reports of junk text (parts of files, etc) appearing after
4557 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4559 PH/22 Added support for macro redefinition, and (re)definition in between
4560 driver and ACL definitions.
4562 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4563 forgetting to use the resulting value; it was using the unexpanded value.
4565 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4566 hadn't been configured. The fix is from Juergen Kreileder, who
4567 understands it better than I do:
4569 "Here's what I see happening with three configured cyrus_sasl
4570 authenticators configured (plain, login, cram-md5):
4572 On startup auth_cyrus_sasl_init() gets called for each of these.
4573 This means three calls to sasl_listmech() without a specified mech_list.
4574 => SASL tests which mechs of all available mechs actually work
4575 => three warnings about OTP not working
4576 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4578 With the patch, sasl_listmech() also gets called three times. But now
4579 SASL's mech_list option is set to the server_mech specified in the the
4580 authenticator. Or in other words, the answer from sasl_listmech()
4581 gets limited to just the mech you're testing for (which is different
4583 => the return list contains just 'plain' or 'login', 'cram-md5' or
4584 nothing depending on the value of ob->server_mech.
4586 I've just tested the patch: Authentication still works fine,
4587 unavailable mechs specified in the exim configuration are still
4588 caught, and the auth.log warnings about OTP are gone."
4590 PH/25 When debugging is enabled, the contents of the command line are added
4591 to the debugging output, even when log_selector=+arguments is not
4594 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4595 answer is "GNU", and only if the return is "GNU/something" is the answer
4598 PH/27 $acl_verify_message is now set immediately after the failure of a
4599 verification in an ACL, and so is available in subsequent modifiers. In
4600 particular, the message can be preserved by coding like this:
4602 warn !verify = sender
4603 set acl_m0 = $acl_verify_message
4605 Previously, $acl_verify_message was set only while expanding "message"
4606 and "log_message" when a very denied access.
4608 PH/28 Modified OS/os.c-Linux with
4610 -#ifndef OS_LOAD_AVERAGE
4611 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4613 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4614 nomenclature these days.)
4616 PH/29 Installed patch from the Sieve maintainer that adds the options
4617 sieve_useraddress and sieve_subaddress to the redirect router.
4619 PH/30 In these circumstances:
4620 . Two addresses routed to the same list of hosts;
4621 . First host does not offer TLS;
4622 . First host accepts first address;
4623 . First host gives temporary error to second address;
4624 . Second host offers TLS and a TLS session is established;
4625 . Second host accepts second address.
4626 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4627 and peerdn, if requested) that were in fact used only for the second
4630 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4631 attention to any local part prefix or suffix that was matched by the
4632 router that accepted the address. It now behaves in the same way as it
4633 does for delivery: the affixes are removed from the local part unless
4634 rcpt_include_affixes is set on the transport.
4636 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4637 timeout during the DATA phase of an incoming message.
4639 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4640 applied a patch sanctioned by the Sieve maintainer.
4642 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4643 the uid or gid is negative. A case of a negative gid caused this to be
4644 noticed. The fix allows for either to be negative.
4646 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4647 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4650 PH/36 The change PH/12 above was broken. Fixed it.
4652 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4653 the grounds that routing the same address twice would always produce the
4654 same answer. This might have been true once, but it is certainly no
4655 longer true now. Routing a child address may depend on the previous
4656 routing that produced that child. Some complicated redirection strategies
4657 went wrong when messages had multiple recipients, and made Exim's
4658 behaviour dependent on the order in which the addresses were given.
4660 I have moved the duplicate checking until after the routing is complete.
4661 Exim scans the addresses that are assigned to local and remote
4662 transports, and removes any duplicates. This means that more work will be
4663 done, as duplicates will always all be routed, but duplicates are
4664 presumably rare, so I don't expect this is of any significance.
4666 For deliveries to pipes, files, and autoreplies, the duplicate checking
4667 still happens during the routing process, since they are not going to be
4670 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4671 It corrects a timeout issue with spamd. This is Ian's comment: "The
4672 background is that sometimes spamd either never reads data from a
4673 connection it has accepted, or it never writes response data. The exiscan
4674 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4675 blindly assumes that writes won't block so it may never time out."
4677 PH/39 Allow G after quota size as well as K and M.
4679 PH/40 The value set for $authenticated_id in an authenticator may not contain
4680 binary zeroes or newlines because the value is written to log lines and
4681 to spool files. There was no check on this. Now the value is run through
4682 the string_printing() function so that such characters are converted to
4683 printable escape sequences.
4685 PH/41 $message_linecount is a new variable that contains the total number of
4686 lines in the message. Compare $body_linecount, which is the count for the
4689 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4690 bounce and delay warning messages, except in certain special cases, which
4693 (a) An SMTP error message from a remote host;
4694 (b) A message specified in a :fail: redirection;
4695 (c) A message specified in a "fail" command in a system filter;
4696 (d) A message specified in a FAIL return from the queryprogram router;
4697 (e) A message specified by the cannot_route_message router option.
4699 In these cases only, Exim does include the error details in bounce and
4700 warning messages. There are also a few cases where bland messages such
4701 as "unrouteable address" or "local delivery error" are given.
4703 PH/43 $value is now also set for the "else" part of a ${run expansion.
4705 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4706 being worked on, but at least Exim now implements the latest version to
4709 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4710 process to complete was treated as a delivery failure, a timeout while
4711 writing the message to the pipe was logged, but erroneously treated as a
4712 successful delivery. Such timeouts include transport filter timeouts. For
4713 consistency with the overall process timeout, these timeouts are now
4714 treated as errors, giving rise to delivery failures by default. However,
4715 there is now a new Boolean option for the pipe transport called
4716 timeout_defer, which, if set TRUE, converts the failures into defers for
4717 both kinds of timeout. A transport filter timeout is now identified in
4720 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4721 systems where "make" and "gmake" are different, calling "gmake" at top
4722 level broke things. I've arranged for the value of $(MAKE) to be passed
4723 from the Makefile to this script so that it can call the same version of
4727 A note about Exim versions 4.44 and 4.50
4728 ----------------------------------------
4730 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4731 changes of various kinds. As a consequence, a big documentation update was
4732 needed. This delayed the release for rather longer than seemed good, especially
4733 in the light of a couple of (minor) security issues. Therefore, the changes
4734 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4735 release. So 4.44 and 4.50 are in effect two different branches that both start
4738 I have left the 4.50 change log unchanged; it contains all the changes since
4739 4.43. The change log for 4.44 is below; many of its items are identical to
4740 those for 4.50. This seems to be the most sensible way to preserve the
4741 historical information.
4747 1. Minor wording change to the doc/README.SIEVE file.
4749 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4750 computation of the current number of files was incorrect.
4752 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4753 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4756 4. Give more explanation in the error message when the command for a transport
4757 filter fails to execute.
4759 5. There are several places where Exim runs a non-Exim command in a
4760 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4761 was being done only for the command run by the queryprogram router. It is
4762 now done for all such subprocesses. The other cases are: ${run, transport
4763 filters, and the commands run by the lmtp and pipe transports.
4765 6. Added CONFIGURE_GROUP build-time option.
4767 7. Some older OS have a limit of 256 on the maximum number of file
4768 descriptors. Exim was using setrlimit() to set 1000 as a large value
4769 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4770 systems. I've change it so that if it can't get 1000, it tries for 256.
4772 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4773 was an oversight, and furthermore, ever since the addition of extra
4774 controls (e.g. 4.43/32), the checks on when to allow different forms of
4775 "control" were broken. There should now be diagnostics for all cases when a
4776 control that does not make sense is encountered.
4778 9. Added the /retain_sender option to "control=submission".
4780 10. $recipients is now available in the predata ACL (oversight).
4782 11. Tidy the search cache before the fork to do a delivery from a message
4783 received from the command line. Otherwise the child will trigger a lookup
4784 failure and thereby defer the delivery if it tries to use (for example) a
4785 cached ldap connection that the parent has called unbind on.
4787 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4788 of $address_data from the recipient verification was clobbered by the
4789 sender verification.
4791 13. The value of address_data from a sender verification is now available in
4792 $sender_address_data in subsequent conditions in the ACL statement.
4794 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4796 15. Added a new option "connect=<time>" to callout options, to set a different
4799 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4800 was its contents. (It was OK if the option was not defined at all.)
4802 17. A "Completed" log line is now written for messages that are removed from
4803 the spool by the -Mrm option.
4805 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4806 information about exactly what failed.
4808 19. Added -dd to debug only the daemon process.
4810 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4811 handles timeouts, both on the server side and network timeouts. Renamed the
4812 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4814 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4815 It is now set to "smtps".
4817 22. $host_address is now set to the target address during the checking of
4818 ignore_target_hosts.
4820 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4821 being passed; this would have caused $sender_host_name to have been used if
4822 matching the list had actually called for a host name (not very likely,
4823 since this list is usually IP addresses). A host name is now passed as
4826 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4827 code that specifies a non-restarting handler (typically sigaction() in
4828 modern systems) in an attempt to fix a rare and obscure crash bug.
4830 25. Narrowed the window for a race in the daemon that could cause it to ignore
4831 SIGCHLD signals. This is not a major problem, because they are used only to
4832 wake it up if nothing else does.
4834 26. A malformed maildirsize file could cause Exim to calculate negative values
4835 for the mailbox size or file count. Odd effects could occur as a result.
4836 The maildirsize information is now recalculated if the size or filecount
4839 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4840 support for a long time. Removed HAVE_SYS_VFS_H.
4842 28. Installed the latest version of exipick from John Jetmore.
4844 29. In an address list, if the pattern was not a regular expression, an empty
4845 subject address (from a bounce message) matched only if the pattern was an
4846 empty string. Non-empty patterns were not even tested. This was the wrong
4847 because it is perfectly reasonable to use an empty address as part of a
4848 database query. An empty address is now tested by patterns that are
4849 lookups. However, all the other forms of pattern expect the subject to
4850 contain a local part and a domain, and therefore, for them, an empty
4851 address still always fails if the pattern is not itself empty.
4853 30. Exim went into a mad DNS loop when attempting to do a callout where the
4854 host was specified on an smtp transport, and looking it up yielded more
4855 than one IP address.
4857 31. Re-factored the code for checking spool and log partition space into a
4858 function that finds that data and another that does the check. The former
4859 is then used to implement four new variables: $spool_space, $log_space,
4860 $spool_inodes, and $log_inodes.
4862 32. The RFC2047 encoding function was originally intended for short strings
4863 such as real names; it was not keeping to the 75-character limit for
4864 encoded words that the RFC imposes. It now respects the limit, and
4865 generates multiple encoded words if necessary. To be on the safe side, I
4866 have increased the buffer size for the ${rfc2047: expansion operator from
4869 33. It is now permitted to omit both strings after an "if" condition; if the
4870 condition is true, the result is "true". As before, when the second string
4871 is omitted, a false condition yields an empty string. This makes it less
4872 cumbersome to write custom ACL and router conditions.
4874 34. Failure to deliver a bounce message always caused it to be frozen, even if
4875 there was an errors_to setting on the router. The errors_to setting is now
4878 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4879 canonical form (fully expanded) before being placed in
4880 $sender_host_address.
4882 36. The table in the code that translates DNS record types into text (T_A to
4883 "A" for instance) was missing entries for NS and CNAME. It is just possible
4884 that this could have caused confusion if both these types were looked up
4885 for the same domain, because the text type is used as part of Exim's
4886 per-process caching. But the chance of anyone hitting this buglet seems
4889 37. The dnsdb lookup has been extended in a number of ways.
4891 (1) There is a new type, "zns", which walks up the domain tree until it
4892 finds some nameserver records. It should be used with care.
4894 (2) There is a new type, "mxh", which is like "mx" except that it returns
4895 just the host names, not the priorities.
4897 (3) It is now possible to give a list of domains (or IP addresses) to be
4898 looked up. The behaviour when one of the lookups defers can be
4899 controlled by a keyword.
4901 (4) It is now possible to specify the separator character for use when
4902 multiple records are returned.
4904 38. The dnslists ACL condition has been extended: it is now possible to supply
4905 a list of IP addresses and/or domains to be looked up in a particular DNS
4908 39. Added log_selector=+queue_time_overall.
4910 40. When running the queue in the test harness, wait just a tad after forking a
4911 delivery process, to get repeatability of debugging output.
4913 41. Include certificate and key file names in error message when GnuTLS fails
4914 to set them up, because the GnuTLS error message doesn't include the name
4915 of the failing file when there is a problem reading it.
4917 42. Allow both -bf and -bF in the same test run.
4919 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4921 44. The "Exiscan patch" is now merged into the mainline Exim source.
4923 45. Sometimes the final signoff response after QUIT could fail to get
4924 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4925 < 0 before doing a fflush(). This bug looks as though it goes back to the
4926 introduction of TLS in release 3.20, but "sometimes" must have been rare
4927 because the tests only now provoked it.
4929 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4930 (this can affect the format of dates).
4932 47. exim_tidydb, when checking for the continued existence of a message for
4933 which it has found a message-specific retry record, was not finding
4934 messages that were in split spool directories. Consequently, it was
4935 deleting retry records that should have stayed in existence.
4937 48. Steve fixed some bugs in eximstats.
4939 49. The SPA authentication driver was not abandoning authentication and moving
4940 on to the next authenticator when an expansion was forced to fail,
4941 contradicting the general specification for all authenticators. Instead it
4942 was generating a temporary error. It now behaves as specified.
4944 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4945 (the order specifies the preference for clients). The order is now AES256,
4946 AES128, 3DES, ARCFOUR128.
4948 51. Small patch to Sieve code - explicitly set From: when generating an
4951 52. Exim crashed if a remote delivery caused a very long error message to be
4952 recorded - for instance if somebody sent an entire SpamAssassin report back
4953 as a large number of 550 error lines. This bug was coincidentally fixed by
4954 increasing the size of one of Exim's internal buffers (big_buffer) that
4955 happened as part of the Exiscan merge. However, to be on the safe side, I
4956 have made the code more robust (and fixed the comments that describe what
4959 53. Now that there can be additional text after "Completed" in log lines (if
4960 the queue_time_overall log selector is set), a one-byte patch to exigrep
4961 was needed to allow it to recognize "Completed" as not the last thing in
4964 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4965 patch that reportedly fixes this has been added. I am not expert enough to
4966 create a test for it. This is what the patch creator wrote:
4968 "I found a little strange behaviour of ldap code when working with
4969 Windows 2003 AD Domain, where users was placed in more than one
4970 Organization Units. When I tried to give exim partial DN, the exit code
4971 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4972 But simultaneously result of request was absolutely normal ldap result,
4973 so I produce this patch..."
4975 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4976 REFERENCE, so I have modified the code to exclude the patch when that macro
4979 55. Some experimental protocols are using DNS PTR records for new purposes. The
4980 keys for these records are domain names, not reversed IP addresses. The
4981 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4982 leaves it alone. Component reversal etc. now happens only for IP addresses.
4985 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4987 57. Double the size of the debug message buffer (to 2048) so that more of very
4988 long debug lines gets shown.
4990 58. The exicyclog utility now does better if the number of log files to keep
4991 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4993 59. Two changes related to the smtp_active_hostname option:
4995 (1) $smtp_active_hostname is now available as a variable.
4996 (2) The default for smtp_banner uses $smtp_active_hostname instead
4997 of $primary_hostname.
4999 60. The host_aton() function is supposed to be passed a string that is known
5000 to be a valid IP address. However, in the case of IPv6 addresses, it was
5001 not checking this. This is a hostage to fortune. Exim now panics and dies
5002 if the condition is not met. A case was found where this could be provoked
5003 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5004 components; fortuitously, this particular loophole had already been fixed
5005 by change 4.50/55 above.
5007 If there are any other similar loopholes, the new check in host_aton()
5008 itself should stop them being exploited. The report I received stated that
5009 data on the command line could provoke the exploit when Exim was running as
5010 exim, but did not say which command line option was involved. All I could
5011 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5012 running as the user.
5015 61. There was a buffer overflow vulnerability in the SPA authentication code
5016 (which came originally from the Samba project). I have added a test to the
5017 spa_base64_to_bits() function which I hope fixes it.
5020 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5021 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5023 63. The daemon start-up calls getloadavg() while still root for those OS that
5024 need the first call to be done as root, but it missed one case: when
5025 deliver_queue_load_max is set with deliver_drop_privilege. This is
5026 necessary for the benefit of the queue runner, because there is no re-exec
5027 when deliver_drop_privilege is set.
5029 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5030 This has been fixed.
5032 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5033 was in use, was not putting the data itself into the right store pool;
5034 consequently, it could be overwritten for a subsequent message in the same
5035 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5038 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5040 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5041 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5042 the function were treating the return as a boolean value, which happened to
5043 work because 0=false and not-0=true, but is not correct code.
5045 68. The host_aton() function was not handling scoped IPv6 addresses (those
5046 with, for example, "%eth0" on the end) correctly.
5048 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5049 negated items (that is, ~something) in unsigned ints. Some compilers
5050 apparently mutter when there is no cast.
5052 70. If an address verification called from an ACL failed, and did not produce a
5053 user-specific message (i.e. there was only a "system" message), nothing was
5054 put in $acl_verify_message. In this situation, it now puts the system
5057 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5058 session; change 4.31/43 added the unwanted input to the log line - except
5059 that it did not do this in the start of session case. It now does.
5061 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5062 This is wrong and can cause the other end to generate a synchronization
5063 error if it is another Exim or anything else that does the synchronization
5064 check. A QUIT command is no longer sent after a timeout.
5066 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5067 during host lookups.
5069 74. The defer_ok option of callout verification was not working if it was used
5070 when verifying addresses in header lines, that is, for this case:
5072 verify = header_sender/callout=defer_ok
5074 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5075 those file descriptors could be used for SMTP connections. If anything
5076 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5077 could be sent to the SMTP client, causing chaos. The daemon now opens
5078 stdin, stdout, and stderr to /dev/null when it puts itself into the
5081 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5082 log by default. The user can override this with suitable Perl magic.
5084 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5085 the log message when discard triggers, was not working for the DATA ACL or
5086 for the non-SMTP ACL.
5088 78. Error message wording change in sieve.c.
5090 79. If smtp_accept_max_per_host was set, the number of connections could be
5091 restricted to fewer than expected, because the daemon was trying to set up
5092 a new connection before checking whether the processes handling previous
5093 connections had finished. The check for completed processes is now done
5094 earlier. On busy systems, this bug wouldn't be noticed because something
5095 else would have woken the daemon, and it would have reaped the completed
5098 80. If a message was submitted locally by a user whose login name contained one
5099 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5100 It caused a spool format error. I have fixed the spool reading code. A
5101 related problem was that the "from" clause in the Received: line became
5102 illegal because of the space(s). It is now covered by ${quote_local_part.
5104 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5107 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5109 83. Patch from Sieve maintainer to fix unterminated string problem in
5110 "vacation" handling.
5112 84. Some minor changes to the Linux configuration files to help with other
5113 OS variants using glibc.
5115 85. One more patch for Sieve to update vacation handling to latest spec.
5118 ----------------------------------------------------
5119 See the note above about the 4.44 and 4.50 releases.
5120 ----------------------------------------------------
5126 1. Change 4.43/35 introduced a bug that caused file counts to be
5127 incorrectly computed when quota_filecount was set in an appendfile
5130 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5131 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5134 3. Give more explanation in the error message when the command for a transport
5135 filter fails to execute.
5137 4. There are several places where Exim runs a non-Exim command in a
5138 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5139 was being done only for the command run by the queryprogram router. It is
5140 now done for all such subprocesses. The other cases are: ${run, transport
5141 filters, and the commands run by the lmtp and pipe transports.
5143 5. Some older OS have a limit of 256 on the maximum number of file
5144 descriptors. Exim was using setrlimit() to set 1000 as a large value
5145 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5146 systems. I've change it so that if it can't get 1000, it tries for 256.
5148 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5149 was an oversight, and furthermore, ever since the addition of extra
5150 controls (e.g. 4.43/32), the checks on when to allow different forms of
5151 "control" were broken. There should now be diagnostics for all cases when a
5152 control that does not make sense is encountered.
5154 7. $recipients is now available in the predata ACL (oversight).
5156 8. Tidy the search cache before the fork to do a delivery from a message
5157 received from the command line. Otherwise the child will trigger a lookup
5158 failure and thereby defer the delivery if it tries to use (for example) a
5159 cached ldap connection that the parent has called unbind on.
5161 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5162 of $address_data from the recipient verification was clobbered by the
5163 sender verification.
5165 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5166 was its contents. (It was OK if the option was not defined at all.)
5168 11. A "Completed" log line is now written for messages that are removed from
5169 the spool by the -Mrm option.
5171 12. $host_address is now set to the target address during the checking of
5172 ignore_target_hosts.
5174 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5175 being passed; this would have caused $sender_host_name to have been used if
5176 matching the list had actually called for a host name (not very likely,
5177 since this list is usually IP addresses). A host name is now passed as
5180 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5181 code that specifies a non-restarting handler (typically sigaction() in
5182 modern systems) in an attempt to fix a rare and obscure crash bug.
5184 15. Narrowed the window for a race in the daemon that could cause it to ignore
5185 SIGCHLD signals. This is not a major problem, because they are used only to
5186 wake it up if nothing else does.
5188 16. A malformed maildirsize file could cause Exim to calculate negative values
5189 for the mailbox size or file count. Odd effects could occur as a result.
5190 The maildirsize information is now recalculated if the size or filecount
5193 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5194 support for a long time. Removed HAVE_SYS_VFS_H.
5196 18. Updated exipick to current release from John Jetmore.
5198 19. Allow an empty sender to be matched against a lookup in an address list.
5199 Previously the only cases considered were a regular expression, or an
5202 20. Exim went into a mad DNS lookup loop when doing a callout where the
5203 host was specified on the transport, if the DNS lookup yielded more than
5206 21. The RFC2047 encoding function was originally intended for short strings
5207 such as real names; it was not keeping to the 75-character limit for
5208 encoded words that the RFC imposes. It now respects the limit, and
5209 generates multiple encoded words if necessary. To be on the safe side, I
5210 have increased the buffer size for the ${rfc2047: expansion operator from
5213 22. Failure to deliver a bounce message always caused it to be frozen, even if
5214 there was an errors_to setting on the router. The errors_to setting is now
5217 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5218 canonical form (fully expanded) before being placed in
5219 $sender_host_address.
5221 24. Updated eximstats to version 1.33
5223 25. Include certificate and key file names in error message when GnuTLS fails
5224 to set them up, because the GnuTLS error message doesn't include the name
5225 of the failing file when there is a problem reading it.
5227 26. Expand error message when OpenSSL has problems setting up cert/key files.
5230 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5231 (this can affect the format of dates).
5233 28. exim_tidydb, when checking for the continued existence of a message for
5234 which it has found a message-specific retry record, was not finding
5235 messages that were in split spool directories. Consequently, it was
5236 deleting retry records that should have stayed in existence.
5238 29. eximstats updated to version 1.35
5239 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5240 1.35 - bugfix such that pie charts by volume are generated correctly
5242 30. The SPA authentication driver was not abandoning authentication and moving
5243 on to the next authenticator when an expansion was forced to fail,
5244 contradicting the general specification for all authenticators. Instead it
5245 was generating a temporary error. It now behaves as specified.
5247 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5248 (the order specifies the preference for clients). The order is now AES256,
5249 AES128, 3DES, ARCFOUR128.
5251 31. Small patch to Sieve code - explicitly set From: when generating an
5254 32. Exim crashed if a remote delivery caused a very long error message to be
5255 recorded - for instance if somebody sent an entire SpamAssassin report back
5256 as a large number of 550 error lines. This bug was coincidentally fixed by
5257 increasing the size of one of Exim's internal buffers (big_buffer) that
5258 happened as part of the Exiscan merge. However, to be on the safe side, I
5259 have made the code more robust (and fixed the comments that describe what
5262 33. Some experimental protocols are using DNS PTR records for new purposes. The
5263 keys for these records are domain names, not reversed IP addresses. The
5264 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5265 leaves it alone. Component reversal etc. now happens only for IP addresses.
5268 34. The host_aton() function is supposed to be passed a string that is known
5269 to be a valid IP address. However, in the case of IPv6 addresses, it was
5270 not checking this. This is a hostage to fortune. Exim now panics and dies
5271 if the condition is not met. A case was found where this could be provoked
5272 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5273 components; fortuitously, this particular loophole had already been fixed
5274 by change 4.50/55 or 4.44/33 above.
5276 If there are any other similar loopholes, the new check in host_aton()
5277 itself should stop them being exploited. The report I received stated that
5278 data on the command line could provoke the exploit when Exim was running as
5279 exim, but did not say which command line option was involved. All I could
5280 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5281 running as the user.
5284 35. There was a buffer overflow vulnerability in the SPA authentication code
5285 (which came originally from the Samba project). I have added a test to the
5286 spa_base64_to_bits() function which I hope fixes it.
5289 36. The daemon start-up calls getloadavg() while still root for those OS that
5290 need the first call to be done as root, but it missed one case: when
5291 deliver_queue_load_max is set with deliver_drop_privilege. This is
5292 necessary for the benefit of the queue runner, because there is no re-exec
5293 when deliver_drop_privilege is set.
5295 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5296 was in use, was not putting the data itself into the right store pool;
5297 consequently, it could be overwritten for a subsequent message in the same
5298 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5301 38. Sometimes the final signoff response after QUIT could fail to get
5302 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5303 < 0 before doing a fflush(). This bug looks as though it goes back to the
5304 introduction of TLS in release 3.20, but "sometimes" must have been rare
5305 because the tests only now provoked it.
5311 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5312 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5313 Now it returns an integer. A number of calls were still expecting a T/F
5314 return. Fortuitously, in all cases, the tests worked in OK situations,
5315 which is the norm. However, things would have gone wrong on any write
5316 failures on the smtp file descriptor. This function is used when sending
5317 messages over SMTP and also when doing verify callouts.
5319 2. When Exim is called to do synchronous delivery of a locally submitted
5320 message (the -odf or -odi options), it no longer closes stderr before doing
5323 3. Implemented the mua_wrapper option.
5325 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5327 5. Implemented the functions header_remove(), header_testname(),
5328 header_add_at_position(), and receive_remove_recipient(), and exported them
5331 6. If an ACL "warn" statement specified the addition of headers, Exim already
5332 inserted X-ACL-Warn: at the start if there was no header name. However, it
5333 was not making this test for the second and subsequent header lines if
5334 there were newlines in the string. This meant that an invalid header could
5335 be inserted if Exim was badly configured.
5337 7. Allow an ACL "warn" statement to add header lines at the start or after all
5338 the Received: headers, as well as at the end.
5340 8. Added the rcpt_4xx retry error code.
5342 9. Added postmaster_mailfrom=xxx to callout verification option.
5344 10. Added mailfrom=xxxx to the callout verification option, for verify=
5347 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5348 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5350 12. Inserted some casts to stop certain compilers warning when using pointer
5351 differences as field lengths or precisions in printf-type calls (mostly
5352 affecting debugging statements).
5354 13. Added optional readline() support for -be (dynamically loaded).
5356 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5357 same clock tick as a message's arrival, so that its received time was the
5358 same as the "first fail" time on the retry record, and that message
5359 remained on the queue past the ultimate address timeout, every queue runner
5360 would try a delivery (because it was past the ultimate address timeout) but
5361 after another failure, the ultimate address timeout, which should have then
5362 bounced the address, did not kick in. This was a "< instead of <=" error;
5363 in most cases the first failure would have been in the next clock tick
5364 after the received time, and all would be well.
5366 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5367 being recognized when the domain list was tested by the match_domain
5368 condition in an expansion string.
5370 16. Added the ${str2b64: operator.
5372 17. Exim was always calling setrlimit() to set a large limit for the number of
5373 processes, without checking whether the existing limit was already
5374 adequate. (It did check for the limit on file descriptors.) Furthermore,
5375 errors from getrlimit() and setrlimit() were being ignored. Now they are
5376 logged to the main and panic logs, but Exim does carry on, to try to do its
5377 job under whatever limits there are.
5379 18. Imported PCRE 5.0.
5381 19. Trivial typo in log message " temporarily refused connection" (the leading
5384 20. If the log selector return_path_on_delivery was set and an address was
5385 redirected to /dev/null, the delivery process crashed because it assumed
5386 that a return path would always be set for a "successful" delivery. In this
5387 case, the whole delivery is bypassed as an optimization, and therefore no
5390 21. Internal re-arrangement: the function for sending a challenge and reading
5391 a response while authentication was assuming a zero-terminated challenge
5392 string. It's now changed to take a pointer and a length, to allow for
5393 binary data in such strings.
5395 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5397 23. Exim was not respecting finduser_retries when seeking the login of the
5398 uid under which it was called; it was always trying 10 times. (The default
5399 setting of finduser_retries is zero.) Also, it was sleeping after the final
5400 failure, which is pointless.
5402 24. Implemented tls_on_connect_ports.
5404 25. Implemented acl_smtp_predata.
5406 26. If the domain in control=submission is set empty, Exim assumes that the
5407 authenticated id is a complete email address when it generates From: or
5408 Sender: header lines.
5410 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5411 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5412 chown and chgrp in /bin and hostname in /usr/bin.
5414 28. Exim was keeping the "process log" file open after each use, just as it
5415 does for the main log. This opens the possibility of it remaining open for
5416 long periods when the USR1 signal hits a daemon. Occasional processlog
5417 errors were reported, that could have been caused by this. Anyway, it seems
5418 much more sensible not to leave this file open at all, so that is what now
5421 29. The long-running daemon process does not normally write to the log once it
5422 has entered its main loop, and it closes the log before doing so. This is
5423 so that log files can straightforwardly be renamed and moved. However,
5424 there are a couple of unusual error situations where the daemon does write
5425 log entries, and I had neglected to close the log afterwards.
5427 30. The text of an SMTP error response that was received during a remote
5428 delivery was being truncated at 512 bytes. This is too short for some of
5429 the long messages that one sometimes sees. I've increased the limit to
5432 31. It is now possible to make retry rules that apply only when a message has a
5433 specific sender, in particular, an empty sender.
5435 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5436 it possible to be selective about when SMTP synchronization is enforced.
5438 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5440 32. Implemented hosts_connection_nolog.
5442 33. Added an ACL for QUIT.
5444 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5447 35. Added mailbox_size and mailbox_filecount to appendfile.
5449 36. Added control = no_multiline_responses to ACLs.
5451 37. There was a bug in the logic of the code that waits for the clock to tick
5452 in the case where the clock went backwards by a substantial amount such
5453 that the microsecond fraction of "now" was more than the microsecond
5454 fraction of "then" (but the whole seconds number was less).
5456 38. Added support for the libradius Radius client library this is found on
5457 FreeBSD (previously only the radiusclient library was supported).
5463 1. When certain lookups returned multiple values in the form name=value, the
5464 quoting of the values was not always being done properly. Specifically:
5465 (a) If the value started with a double quote, but contained no whitespace,
5467 (b) If the value contained whitespace other than a space character (i.e.
5468 tabs or newlines or carriage returns) it was not quoted.
5469 This fix has been applied to the mysql and pgsql lookups by writing a
5470 separate quoting function and calling it from the lookup code. The fix
5471 should probably also be applied to nisplus, ibase and oracle lookups, but
5472 since I cannot test any of those, I have not disturbed their existing code.
5474 2. A hit in the callout cache for a specific address caused a log line with no
5475 reason for rejecting RCPT. Now it says "Previous (cached) callout
5476 verification failure".
5478 3. There was an off-by-one bug in the queryprogram router. An over-long
5479 return line was truncated at 256 instead of 255 characters, thereby
5480 overflowing its buffer with the terminating zero. As well as fixing this, I
5481 have increased the buffer size to 1024 (and made a note to document this).
5483 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5484 when Exim is waiting for an SMTP response from a remote server, Exim
5485 restarts its select() call on the socket, thereby resetting its timeout.
5486 This is not a problem when such interrupts are rare. Somebody set up a cron
5487 job to run exiwhat every 2 minutes, which is less than the normal select()
5488 timeout (5 or 10 minutes). This meant that the select() timeout never
5489 kicked in because it was always reset. I have fixed this by comparing the
5490 time when an interrupt arrives with the time at the start of the first call
5491 to select(). If more time than the timeout has elapsed, the interrupt is
5492 treated as a timeout.
5494 5. Some internal re-factoring in preparation for the addition of Sieve
5495 extensions (by MH). In particular, the "personal" test is moved to a
5496 separate function, and given an option for scanning Cc: and Bcc: (which is
5497 not set for Exim filters).
5499 6. When Exim created an email address using the login of the caller as the
5500 local part (e.g. when creating a From: or Sender: header line), it was not
5501 quoting the local part when it contained special characters such as @.
5503 7. Installed new OpenBSD configuration files.
5505 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5506 try to make them clearer.
5508 9. Callout options, other than the timeout value, were being ignored when
5509 verifying sender addresses in header lines. For example, when using
5511 verify = header_sender/callout=no_cache
5513 the cache was (incorrectly) being used.
5515 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5516 only the Cygwin environment.
5518 11. When return_path_on_delivery was set as a log selector, if different remote
5519 addresses in the same message used different return paths and parallel
5520 remote delivery occurred, the wrong values would sometimes be logged.
5521 (Whenever a remote delivery process finished, the return path value from
5522 the most recently started remote delivery process was logged.)
5524 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5525 lines when AUTH and/or TLS are in use. This is the "received protocol"
5526 field. Exim used to use "asmtp" for authenticated SMTP, without any
5527 indication (in the protocol name) for TLS use. Now it follows the RFC and
5528 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5529 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5530 names appear in log lines as well as in Received: header lines.
5532 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5533 extensions, and comparison tests, and to fix some bugs.
5535 14. Changes to the "personal" filter test:
5537 (1) The test was buggy in that it was just doing the equivalent of
5538 "contains" tests on header lines. For example, if a user's address was
5539 anne@some.where, the "personal" test would incorrectly be true for
5541 To: susanne@some.where
5543 This test is now done by extracting each address from the header in turn,
5544 and checking the entire address. Other tests that are part of "personal"
5545 are now done using regular expressions (for example, to check local parts
5546 of addresses in From: header lines).
5548 (2) The list of non-personal local parts in From: addresses has been
5549 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5550 taken from the Sieve specification recommendations.
5552 (3) If the message contains any header line starting with "List-" it is
5553 treated as non-personal.
5555 (4) The test for "circular" in the Subject: header line has been removed
5556 because it now seems ill-conceived.
5558 15. Minor typos in src/EDITME comments corrected.
5560 16. Installed latest exipick from John Jetmore.
5562 17. If headers_add on a router specified a text string that was too long for
5563 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5564 of string_sprintf() is now avoided.
5566 18. $message_body_size was not set (it was always zero) when running the DATA
5567 ACL and the local_scan() function.
5569 19. For the "mail" command in an Exim filter, no default was being set for
5570 the once_repeat time, causing a random time value to be used if "once" was
5571 specified. (If the value happened to be <= 0, no repeat happened.) The
5572 default is now 0s, meaning "never repeat". The "vacation" command was OK
5573 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5574 (I found it when inspecting the code).
5576 20. There is now an overall timeout for performing a callout verification. It
5577 defaults to 4 times the callout timeout, which applies to individual SMTP
5578 commands during the callout. The overall timeout applies when there is more
5579 than one host that can be tried. The timeout is checked before trying the
5580 next host. This prevents very long delays if there are a large number of
5581 hosts and all are timing out (e.g. when the network connections are timing
5582 out). The value of the overall timeout can be changed by specifying an
5583 additional sub-option for "callout", called "maxwait". For example:
5585 verify = sender/callout=5s,maxwait=20s
5587 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5588 to the end before writing, but this should make it even safer).
5590 22. Exim was forgetting that it had advertised PIPELINING for the second and
5591 subsequent messages on an SMTP connection. It was also not resetting its
5592 memory on STARTTLS and an internal HELO.
5594 23. When Exim logs an SMTP synchronization error within a session, it now
5595 records whether PIPELINING has been advertised or not.
5597 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5598 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5599 rather than long int.
5601 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5603 26. Added the never_mail option to autoreply.
5609 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5610 crash if the getsockname() call failed; this can happen if a connection is
5611 closed very soon after it is established. The problem was simply in the
5612 order in which certain operations were done, causing Exim to try to write
5613 to the SMTP stream before it had set up the file descriptor. The bug has
5614 been fixed by making things happen in the correct order.
5620 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5621 before the connection was closed, thus losing the rejection response.
5623 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5624 some early Solaris releases, but causes trouble in current releases where
5625 socklen_t is defined.
5627 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5630 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5633 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5634 that releasing the top of it at the end releases what was used for sub-
5635 expansions (unless the block got too big). However, discard this block if
5636 the first thing is a variable or header, so that we can use its block when
5637 it is dynamic (useful for very large $message_headers, for example).
5639 6. Lookups now cache *every* query, not just the most recent. A new, separate
5640 store pool is used for this. It can be recovered when all lookup caches are
5641 flushed. Lookups now release memory at the end of their result strings.
5642 This has involved some general refactoring of the lookup sources.
5644 7. Some code has been added to the store_xxx() functions to reduce the amount
5645 of flapping under certain conditions.
5647 8. log_incoming_interface used to affect only the <= reception log lines. Now
5648 it causes the local interface and port to be added to several more SMTP log
5649 lines, for example "SMTP connection from", and rejection lines.
5651 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5653 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5655 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5656 could be overwritten at the end of the current message (or the start of a
5657 new message if it was set in a HELO ACL). The value is now preserved for
5658 the duration of the SMTP connection.
5660 12. If a transport had a headers_rewrite setting, and a matching header line
5661 contained an unqualified address, that address was qualified, even if it
5662 did not match any rewriting rules. The underlying bug was that the values
5663 of the flags that permit the existence of unqualified sender and recipient
5664 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5665 non-local messages, and by -bnq for local messages) were not being
5666 preserved with the message after it was received.
5668 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5669 "next input=" as part of the text comprising the host identity instead of
5670 the correct text. The code was using the same buffer for two different
5671 strings. However, depending on which order the printing function evaluated
5672 its arguments, the bug did not always show up. Under Linux, for example, my
5673 test suite worked just fine.
5675 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5676 doesn't work with some older versions of Perl. It has been changed to "my",
5677 which in any case is probably the better facility to use.
5679 15. A really picky compiler found some instances of statements for creating
5680 error messages that either had too many or two few arguments for the format
5683 16. The size of the buffer for calls to the DNS resolver has been increased
5684 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5685 for addresses that have a lot of PTR records. This alleviates a problem; it
5686 does not fully solve it.
5688 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5689 buffer now truncates the list and logs the incident, which is the same
5690 action as happens when Exim is looking up a host name and its aliases.
5691 Previously in this situation something unpredictable would happen;
5692 sometimes it was "internal error: store_reset failed".
5694 18. If a server dropped the connection unexpectedly when an Exim client was
5695 using GnuTLS and trying to read a response, the client delivery process
5696 crashed while trying to generate an error log message.
5698 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5699 string, for example:
5701 warn message = H1: something\nH2: something
5703 the text was added as a single header line from Exim's point of view
5704 though it ended up OK in the delivered message. However, searching for the
5705 second and subsequent header lines using $h_h2: did not work. This has been
5706 fixed. Similarly, if a system filter added multiple headers in this way,
5707 the routers could not see them.
5709 20. Expanded the error message when iplsearch is called with an invalid key to
5710 suggest using net-iplsearch in a host list.
5712 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5713 ACLs are no longer actually imposed (and a message to that effect is
5716 22. If a "gecos" field in a passwd entry contained escaped characters, in
5717 particular, if it contained a \" sequence, Exim got it wrong when building
5718 a From: or a Sender: header from that name. A second bug also caused
5719 incorrect handling when an unquoted " was present following a character
5720 that needed quoting.
5722 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5723 was not being matched caselessly.
5725 24. Arranged for all hyphens in the exim.8 source to be escaped with
5728 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5729 properly. Recipient callout cache records were still being keyed to include
5730 the sender, even when use_sender was set false. This led to far more
5731 callouts that were necessary. The sender is no longer included in the key
5732 when use_sender is false.
5734 26. Added "control = submission" modifier to ACLs.
5736 27. Added the ${base62d: operator to decode base 62 numbers.
5738 28. dnsdb lookups can now access SRV records.
5740 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5741 the configuration file.
5743 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5744 (-v) mode. This makes the output for a verbose queue run more intelligible.
5746 31. Added a use_postmaster feature to recipient callouts.
5748 32. Added the $body_zerocount variable, containing the number of binary zero
5749 bytes in the message body.
5751 33. The time of last modification of the "new" subdirectory is now used as the
5752 "mailbox time last read" when there is a quota error for a maildir
5755 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5757 35. Added +ignore_unknown as a special item in host lists.
5759 36. Code for decoding IPv6 addresses in host lists is now included, even if
5760 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5761 address was recognized as an IP address, but was then not correctly decoded
5762 into binary, causing unexpected and incorrect effects when compared with
5769 1. Very minor rewording of debugging text in manualroute to say "list of
5770 hosts" instead of "hostlist".
5772 2. If verify=header_syntax was set, and a header line with an unqualified
5773 address (no domain) and a large number of spaces between the end of the
5774 name and the colon was received, the reception process suffered a buffer
5775 overflow, and (when I tested it) crashed. This was caused by some obsolete
5776 code that should have been removed. The fix is to remove it!
5778 3. When running in the test harness, delay a bit after writing a bounce
5779 message to get a bit more predictability in the log output.
5781 4. Added a call to search_tidyup() just before forking a reception process. In
5782 theory, someone could use a lookup in the expansion of smtp_accept_max_
5783 per_host which, without the tidyup, could leave open a database connection.
5785 5. Added the variables $recipient_data and $sender_data which get set from a
5786 lookup success in an ACL "recipients" or "senders" condition, or a router
5787 "senders" option, similar to $domain_data and $local_part_data.
5789 6. Moved the writing of debug_print from before to after the "senders" test
5792 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5793 problems for message scanning, either using a data ACL, or using
5794 local_scan() because the Received: header was not generated till after they
5795 were called (in order to set the time as the time of reception completion).
5796 I have revised the way this works. The header is now generated after the
5797 body is received, but before the ACL or local_scan() are called. After they
5798 are run, the timestamp in the header is updated.
5804 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5805 before starting a queue runner without re-exec. This happened only when
5806 deliver_drop_privilege was set or when the Exim user was set to root. The
5807 effect of the bug was that timeouts during subsequent deliveries caused
5808 crashes instead of being properly handled. The handler is now left at its
5809 default (and expected) setting.
5811 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5812 message, again when deliver_drop_privilege is set or Exim is run as root.
5813 The bug described in (1) was not present in this case, but the tidying up
5814 of the other signals was missing. I have made the two cases consistent.
5816 3. The ignore_target_hosts setting on a manualroute router was being ignored
5817 for hosts that were looked up using the /MX notation.
5819 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5822 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5823 operated on the sender address. After changing the $sender_address to <>
5824 for the sender address verify, Exim was re-instated it as the original
5825 (before rewriting) address, but remembering that it had rewritten it, so it
5826 wasn't rewriting it again. This bug also had the effect of breaking the
5827 sender address verification caching when the sender address was rewritten.
5829 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5830 This has been changed so that if the ip literal address matches
5831 ignore_target_hosts, the router declines.
5833 7. Added expansion conditions match_domain, match_address, and match_local_
5834 part (NOT match_host).
5836 8. The placeholder for the Received: header didn't have a length field set.
5838 9. Added code to Exim itself and to exim_lock to test for a specific race
5839 condition that could lead to file corruption when using MBX delivery. The
5840 issue is with the lockfile that is created in /tmp. If this file is removed
5841 after a process has opened it but before that process has acquired a lock,
5842 there is the potential for a second process to recreate the file and also
5843 acquire a lock. This could lead to two Exim processes writing to the file
5844 at the same time. The added code performs the same test as UW imapd; it
5845 checks after acquiring the lock that its file descriptor still refers to
5846 the same named file.
5848 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5849 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5852 11. Added the smtp_active_hostname option. If used, this will typically be made
5853 to depend on the incoming interface address. Because $interface_address is
5854 not set up until the daemon has forked a reception process, error responses
5855 that can happen earlier (such as "too many connections") no longer contain
5858 12. If an expansion in a condition on a "warn" statement fails because a lookup
5859 defers, the "warn" statement is abandoned, and the next ACL statement is
5860 processed. Previously this caused the whole ACL to be aborted.
5862 13. Added the iplsearch lookup type.
5864 14. Added ident_timeout as a log selector.
5866 15. Added tls_certificate_verified as a log selector.
5868 16. Added a global option tls_require_ciphers (compare the smtp transport
5869 option of the same name). This controls incoming TLS connections.
5871 17. I finally figured out how to make tls_require_ciphers do a similar thing
5872 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5873 before starting the TLS session.
5875 18. Tabs are now shown as \t in -bP output.
5877 19. If the log selector return_path_on_delivery was set, Exim crashed when
5878 bouncing a message because it had too many Received: header lines.
5880 20. If two routers both had headers_remove settings, and the first one included
5881 a superfluous trailing colon, the final name in the first list and the
5882 first name in the second list were incorrectly joined into one item (with a
5883 colon in the middle).
5889 1. Added -C and -D options to the exinext utility, mainly to make it easier
5890 to include in the automated testing, but these could be helpful when
5891 multiple configurations are in use.
5893 2. The exinext utility was not formatting the output nicely when there was
5894 an alternate port involved in the retry record key, nor when there was a
5895 message id as well (for retries that were specific to a specific message
5896 and a specific host). It was also confused by IPv6 addresses, because of
5897 the additional colons they contain. I have fixed the IPv4 problem, and
5898 patched it up to do a reasonable job for IPv6.
5900 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5901 delivery, the log line now contains "pipelined" if PIPELINING was used.
5903 4. An SMTP transport process used to panic and die if the bind() call to set
5904 an explicit outgoing interface failed. This has been changed; it is now
5905 treated in the same way as a connect() failure.
5907 5. A reference to $sender_host_name in the part of a conditional expansion
5908 that was being skipped was still causing a DNS lookup. This no longer
5911 6. The def: expansion condition was not recognizing references to header lines
5912 that used bh_ and bheader_.
5914 7. Added the _cache feature to named lists.
5916 8. The code for checking quota_filecount in the appendfile transport was
5917 allowing one more file than it should have been.
5919 9. For compatibility with Sendmail, the command line option
5927 and sets the incoming protocol and host name (for trusted callers). The
5928 host name and its colon can be omitted when only the protocol is to be set.
5929 Note the Exim already has two private options, -pd and -ps, that refer to
5930 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5931 "s", but I don't think that's a major issue.
5933 10. A number of refactoring changes to the code, none of which should affect
5936 (a) The number of logging options was getting close to filling up the
5937 32-bit word that was used as a bit map. I have split them into two classes:
5938 those that are passed in the argument to log_write(), and those that are
5939 only ever tested independently outside of that function. These are now in
5940 separate 32-bit words, so there is plenty of room for expansion again.
5941 There is no change in the user interface or the logging behaviour.
5943 (b) When building, for example, log lines, the code previously used a
5944 macro that called string_cat() twice, in order to add two strings. This is
5945 not really sufficiently general. Furthermore, there was one instance where
5946 it was actually wrong because one of the argument was used twice, and in
5947 one call a function was used. (As it happened, calling the function twice
5948 did not affect the overall behaviour.) The macro has been replaced by a
5949 function that can join an arbitrary number of extra strings onto a growing
5952 (c) The code for expansion conditions now uses a table and a binary chop
5953 instead of a serial search (which was left over from when there were very
5954 few conditions). Also, it now recognizes conditions like "pam" even when
5955 the relevant support is not compiled in: a suitably worded error message is
5956 given if an attempt is made to use such a condition.
5958 11. Added ${time_interval:xxxxx}.
5960 12. A bug was causing one of the ddress fields not to be passed back correctly
5961 from remote delivery subprocesses. The field in question was not being
5962 subsequently used, so this caused to problems in practice.
5964 13. Added new log selectors queue_time and deliver_time.
5966 14. Might have fixed a bug in maildirsizefile handling that threw up
5967 "unexpected character" debug warnings, and recalculated the data
5968 unnecessarily. In any case, I expanded the warning message to give more
5971 15. Added the message "Restricted characters in address" to the statements in
5972 the default ACL that block characters like @ and % in local parts.
5974 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5975 Three changes have been made:
5977 (a) There was a serious bug; a negative response to MAIL caused the whole
5978 recipient domain to be cached as invalid, thereby blocking all messages
5979 to all local parts at the same domain, from all senders. This bug has
5980 been fixed. The domain is no longer cached after a negative response to
5981 MAIL if the sender used is not empty.
5983 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5986 (c) A new callout option, "use_sender" has been added for people who want
5987 the modified behaviour.
5993 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5996 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5997 indeed breaks things for older releases.
5999 3. Added additional logging to the case where there is a problem reading data
6000 from a filter that is running in a subprocess using a pipe, in order to
6001 try to track down a specific problem.
6003 4. Testing facility fudge: when running in the test harness and attempting
6004 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6005 getting "No route to host". Convert this to a timeout.
6007 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6010 6. Some OS don't have socklen_t but use size_t instead. This affects the
6011 fifth argument of getsockopt() amongst other things. This is now
6012 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6013 can be set for individual OS. I have set it for SunOS5, OSF1, and
6014 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6015 some earlier ones do not.
6017 7. Change 4.30/15 was not doing the test caselessly.
6019 8. The standard form for an IPv6 address literal was being rejected by address
6020 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6021 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6022 this, as well as the form without the "IPv6" on the front (but only when
6023 address literals are enabled, of course).
6025 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6027 10. Exim crashed if a message with an empty sender address specified by -f
6028 encountered a router with an errors_to setting. This could be provoked only
6029 by a command such as
6033 where an empty string was supplied; "<>" did not hit this bug.
6035 11. Installed PCRE release 4.5.
6037 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6038 remained set. It is now erased.
6040 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6041 times from message ids (which are base 36 rather than the normal 62).
6043 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6044 were being counted as actual protocol errors, and logged if the log
6045 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6046 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6047 and DATA following a set of rejected RCPTs do not count as protocol errors.
6048 In other words, Exim assumes they were pipelined, though this may not
6049 actually be the case. Of course, in all cases the client gets an
6050 appropriate error code.
6052 15. If a lookup fails in an ACL condition, a message about the failure may
6053 be available; it is used if testing the ACL cannot continue, because most
6054 such messages specify what the cause of the deferral is. However, some
6055 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6056 that caused an old message to be retained and used if a later statement
6057 caused a defer, replacing the real cause of the deferral.
6059 16. If an IP address had so many PTR records that the DNS lookup buffer
6060 was not large enough to hold them, Exim could crash while trying to process
6061 the truncated data. It now detects and logs this case.
6063 17. Further to 4.21/58, another change has been made: if (and only if) the
6064 first line of a message (the first header line) ends with CRLF, a bare LF
6065 in a subsequent header line has a space inserted after it, so as not to
6066 terminate the header.
6068 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6069 unnecessarily, used atoi() instead of strtol(), and didn't check the
6070 termination when getting file sizes from file names by regex.
6072 19. Completely re-implemented the support for maildirsize files, in the light
6073 of a number of problems with the previous contributed implementation
6074 (4.30/29). In particular:
6076 . If the quota is zero, the maildirsize file is maintained, but no quota is
6079 . If the maildir directory does not exist, it is created before any attempt
6080 to write a maildirsize file.
6082 . The quota value in the file is just a cache; if the quota is changed in
6083 the transport, the new value overrides.
6085 . A regular expression is available for excluding directories from the
6088 20. The autoreply transport checks the characters in options that define the
6089 message's headers; it allows continued headers, but it was checking with
6090 isspace() after an embedded newline instead of explicitly looking for a
6093 21. If all the "regular" hosts to which an address was routed had passed their
6094 expiry times, and had not reached their retry times, the address was
6095 bounced, even if fallback hosts were defined. Now Exim should go on to try
6098 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6099 equivalent code in the SMTP transport. Some hosts send humungous responses
6100 to HELO/EHLO, more than 1024 it seems.
6102 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6103 gives compiler warnings in some environments. I've now done it "properly",
6106 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6107 (because of problems with the built-in one) was declared to return uschar *
6108 instead of char *, causing compiler failure.
6110 25. Fixed a file descriptor leak when processing alias/forward files.
6112 26. Fixed a minor format string issue in dbfn.c.
6114 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6116 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6117 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6120 29. When a sender address is verified, it is cached, to save repeating the test
6121 when there is more than one recipient in a message. However, when the
6122 verification involves a callout, it is possible for different callout
6123 options to be set for different recipients. It is too complicated to keep
6124 track of this in the cache, so now Exim always runs a verification when a
6125 callout is required, relying on the callout cache for the optimization.
6126 The overhead is duplication of the address routing, but this should not be
6129 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6130 to be verified with callout=postmaster, and the main callout worked but the
6131 postmaster check failed, the verification correctly failed. However, if a
6132 subsequent RCPT command asked for sender verification *without* the
6133 postmaster check, incorrect caching caused this verification also to fail,
6136 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6137 it was not caching the DNS options (qualify_single, search_parents) that
6138 were used when the lookup failed. A subsequent lookup with different
6139 options therefore always gave the same answer, though there were cases
6140 where it should not have. (Example: a "domains = !$mx_any" option on a
6141 dnslookup router: the "domains" option is always processed without any
6142 widening, but the router might have qualify_single set.) Now Exim uses the
6143 cached value only when the same options are set.
6145 32. Added John Jetmore's "exipick" utility to the distribution.
6147 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6148 than a timeout (e.g. a certificate is required, and is not provided), an
6149 Exim server now closes the connection immediately. Previously it waited for
6150 the client to close - but if the client is SSL, it seems that they each
6151 wait for each other, leading to a delay before one of them times out.
6153 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6154 maintained 0.8.x compatibility because I don't think many are using it, and
6155 it is clearly obsolete.
6157 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6160 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6161 client certificate was expired. A simple patch fixes this, though I don't
6162 understand the full logic of why the verify callback is called multiple
6165 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6166 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6167 which causes problems with some clients (such as the Certicom SSL Plus
6168 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6169 disables the coutermeasure allowing Eudora to connect."
6171 38. Exim was not checking that a write() to a log file succeeded. This could
6172 lead to Bad Things if a log got too big, in particular if it hit a file
6173 size limit. Exim now panics and dies if it cannot write to a log file, just
6174 as it does if it cannot open a log file.
6176 39. Modified OS/Makefile-Linux so that it now contains
6178 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6180 The two -D definitions ensure that Exim is compiled with large file
6181 support, which makes it possible to handle log files that are bigger than
6184 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6185 instance) a domain was checked against a named list that involved a lookup,
6186 causing $domain_data to be set, then another domain was checked against the
6187 same list, then the first domain was re-checked, the value of $domain_data
6188 after the final check could be wrong. In particular, if the second check
6189 failed, it could be set empty. This bug probably also applied to
6192 41. The strip_trailing_dot option was not being applied to the address given
6193 with the -f command-line option.
6195 42. The code for reading a message's header from the spool was incrementing
6196 $received_count, but never initializing it. This meant that the value was
6197 incorrect (doubled) while delivering a message in the same process in which
6198 it was received. In the most common configuration of Exim, this never
6199 happens - a fresh exec is done - but it can happen when
6200 deliver_drop_privilege is set.
6202 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6203 it now includes up to 150 characters of the unexpected data in the log
6206 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6207 and building data strings. The size of both of these buffers was 10 000
6208 bytes - far larger than anybody would *ever* want, thought I. Needless to
6209 say, somebody hit the limit. I have increased the maximum line length to
6210 20 000 and the maximum data length of concatenated lines to 100 000. I have
6211 also fixed two bugs, because there was no checking on these buffers. Tsk,
6212 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6213 buffer is too small.
6215 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6216 lsearch lookups. Now it does.
6218 46. When parsing a route_list item in a manualroute router, a fixed-length
6219 buffer was used for the list of hosts. I made this 1024 bytes long,
6220 thinking that nobody would ever have a list of hosts that long. Wrong.
6221 Somebody had a whole pile of complicated expansion conditions, and the
6222 string was silently truncated, leading to an expansion error. It turns out
6223 that it is easier to change to an unlimited length (owing to other changes
6224 that have happened since this code was originally written) than to build
6225 structure for giving a limitation error. The length of the item that
6226 expands into the list of hosts is now unlimited.
6228 47. The lsearch lookup could not handle data where the length of text line was
6229 more than 4095 characters. Such lines were truncated, leading to shortened
6230 data being returned. It should now handle lines of any length.
6232 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6233 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6236 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6237 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6238 no longer happens in comment lines. A list of replacements is now placed
6239 at the head of all of the source files, except those whose only change is
6240 to replace PERL_COMMAND in the very first #! line.
6242 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6243 messages on the queue, with a bottom-up merge sort, using code contributed
6244 by Michael Haardt. This should make operations like -bp somewhat faster on
6245 large queues. It won't affect queue runners, except when queue_run_in_order
6248 51. Installed eximstats 1.31 in the distribution.
6250 52. Added support for SRV lookups to the dnslookup router.
6252 53. If an ACL referred to $message_body or $message_body_end, the value was not
6253 reset for any messages that followed in the same SMTP session.
6255 54. The store-handling optimization for building very long strings was not
6256 differentiating between the different store pools. I don't think this
6257 actually made any difference in practice, but I've tidied it.
6259 55. While running the routers to verify a sender address, $sender_address
6260 was still set to the sender address. This is wrong, because when routing to
6261 send a bounce to the sender, it would be empty. Therefore, I have changed
6262 it so that, while verifying a sender address, $sender_address is set to <>.
6263 (There is no change to what happens when verifying a recipient address.)
6265 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6266 target A or AAAA records (if not already returned) without resetting the
6267 qualify_single or search_parents options of the DNS resolver. These are
6268 inappropriate in this case because the targets of MX and SRV records must
6269 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6270 target that, when qualified, matched something in the local domain. These
6271 two options are now turned off when doing these lookups.
6273 57. It seems that at least some releases of Reiserfs (which does not have the
6274 concept of a fixed number of inodes) returns zero and not -1 for the
6275 number of available inodes. This interacted badly with check_spool_inodes,
6276 which assumed that -1 was the "no such thing" setting. What I have done is
6277 to check that the total number of inodes is greater than zero before doing
6278 the test of how many are available.
6280 58. When a "warn" ACL statement has a log_message modifier, the message is
6281 remembered, and not repeated. This is to avoid a lot of repetition when a
6282 message has many recipients that cause the same warning to be written.
6283 However, Exim was preserving the list of already written lines for an
6284 entire SMTP session, which doesn't seem right. The memory is now reset if a
6285 new message is started.
6287 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6288 debugging output unless log_rewrite was also set.
6290 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6291 of (int)(handle) when we know that handle contains (void *)(-1).
6293 61. The Exim daemon panic-logs an error return when it closes the incoming
6294 connection. However "connection reset by peer" seems to be common, and
6295 isn't really an error worthy of noting specially, so that particular error
6298 62. When Exim is trying to find all the local interfaces, it used to panic and
6299 die if the ioctl to get the interface flags failed. However, it seems that
6300 on at least one OS (Solaris 9) it is possible to have an interface that is
6301 included in the list of interfaces, but for which you get a failure error
6302 for this call. This happens when the interface is not "plumbed" into a
6303 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6304 failure of the "get flags" call assumes that the interface is down.
6306 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6307 makes life easier for people who are doing arithmetic on fields extracted
6308 from dates, where you often get leading zeros that should not be
6309 interpreted as octal.
6311 64. Added qualify_domain to the redirect router, to override the global
6314 65. If a pathologically long header line contained very many addresses (the
6315 report of this problem mentioned 10 000) and each of them was rewritten,
6316 Exim could use up a very large amount of memory. (It kept on making new
6317 copies of the header line as it rewrote, and never released the old ones.)
6318 At the expense of a bit more processing, the header rewriting function has
6319 been changed so that it no longer eats memory in this way.
6321 66. The generation of the Received: header has been moved from the time that a
6322 message starts to be received, to the time that it finishes. The timestamp
6323 in the Received: header should now be very close to that of the <= log
6324 line. There are two side-effects of this change:
6326 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6327 logged header lines no longer include the local Received: line, because
6328 it has not yet been created. The same applies to a copy of the message
6329 that is returned to a non-SMTP sender when a message is rejected.
6331 (b) When a filter file is tested using -bf, no additional Received: header
6332 is added to the test message. After some thought, I decided that this
6335 This change does not affect the value of $received_for. It is still set
6336 after address rewriting, but before local_scan() is called.
6338 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6340 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6341 gave an unhelpful panic error message, and a defer error. I have managed to
6342 change this behaviour so that it now rejects any supplied certificate,
6343 which seems right, as the list of acceptable certificates is empty.
6345 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6346 gave an unhelpful defer error. I have not managed to make this reject any
6347 supplied certificates, but the error message it gives is "no certificate
6348 supplied", which is not helpful.
6350 70. exigrep's output now also includes lines that are not associated with any
6351 message, but which match the given pattern. Implemented by a patch from
6352 Martin Sluka, which also tidied up the Perl a bit.
6354 71. Recipient callout verification, like sender verification, was using <> in
6355 the MAIL FROM command. This isn't really the right thing, since the actual
6356 sender may affect whether the remote host accepts the recipient or not. I
6357 have changed it to use the actual sender in the callout; this means that
6358 the cache record is now keyed on a recipient/sender pair, not just the
6359 recipient address. There doesn't seem to be a real danger of callout loops,
6360 since a callout by the remote host to check the sender would use <>.
6361 [SEE ABOVE: changed after hitting problems.]
6363 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6364 temporary errors. However, in the case of such a code being given after
6365 the end of a data transmission (i.e. after ".") Exim was failing to write
6366 a retry record for the message. (Yes, there was some broken host that was
6367 actually sending 8xx at this point.)
6369 73. An unknown lookup type in a host list could cause Exim to panic-die when
6370 the list was checked. (An example that provoked this was putting <; in the
6371 middle of a list instead of at the start.) If this happened during a DATA
6372 ACL check, a -D file could be left lying around. This kind of configuration
6373 error no longer causes Exim to die; instead it causes a defer error. The
6374 incident is still logged to the main and panic logs.
6376 74. Buglet left over from Exim 3 conversion. The message "too many messages
6377 in one connection" was written to the rejectlog but not the mainlog, except
6378 when address rewriting (yes!) was being logged.
6380 75. Added write_rejectlog option.
6382 76. When a system filter was run not as root (that is, when system_filter_user
6383 was set), the values of the $n variables were not being returned to the
6384 main process; thus, they were not subsequently available in the $sn
6387 77. Added +return_path_on_delivery log selector.
6389 78. A connection timeout was being treated differently from recipients deferred
6390 when testing hosts_max_try with a message that was older than the host's
6391 retry timeout. (The host should not be counted, thus allowing all hosts to
6392 be tried at least once before bouncing.) This may have been the cause of an
6393 occasionally reported bug whereby a message would remain on the queue
6394 longer than the retry timeout, but would be bounced if a delivery was
6395 forced. I say "may" because I never totally pinned down the problem;
6396 setting up timeout/retry tests is difficult. See also the next item.
6398 79. The ultimate address timeout was not being applied to errors that involved
6399 a combination of host plus message (for example, a timeout on a MAIL
6400 command). When an address resolved to a number of possible hosts, and they
6401 were not all tried for each delivery (e.g. because of hosts_max_try), a
6402 message could remain on the queue longer than the retry timeout.
6404 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6407 81. Fixed an obscure SMTP outgoing bug which required at least the following
6408 conditions: (a) there was another message waiting for the same server;
6409 (b) the server returned 5xx to all RCPT commands in the first message so
6410 that the message was not completed; (c) the server dropped the connection
6411 or gave a negative response to the RSET that Exim sends to abort the
6412 transaction. The observed case was a dropped connection after DATA that had
6413 been sent in pipelining mode. That is, the server had advertised PIPELINING
6414 but was not implementing it correctly. The effect of the bug was incorrect
6415 behaviour, such as trying another host, and this could lead to a crash.
6421 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6422 and daemon.c were passed as pointers to ints; they should have been
6423 pointers to socklen_t variables (which are typically unsigned ints).
6425 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6428 3. Fixed a really odd bug that affected only the testing scheme; patching a
6429 certain fixed string in the binary changed the value of another string that
6430 happened to be identical to the end of the original first string.
6432 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6433 name", it returns that address as the IP address. On some operating
6434 systems (e.g. Solaris), it also passes back the IP address string as the
6435 "host name". However, on others (e.g. Linux), it passes back an empty
6436 string. Exim wasn't checking for this, and was changing the host name to an
6437 empty string, assuming it had been canonicalized.
6439 5. Although rare, it is permitted to have more than one PTR record for a given
6440 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6441 all the names associated with an address, because they do in Solaris.
6442 However, it seems that they do not in Linux for data that comes from the
6443 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6444 I found this out when I moved to a new Linux workstation and tried to run
6445 the Exim test suite.
6447 To get round this problem I have changed the code so that it now does its
6448 own call to the DNS to look up PTR records when searching for a host name.
6449 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6450 addresses that are only in /etc/hosts are still found.
6452 This behaviour is, however, controlled by an option called host_lookup_
6453 order, which defaults to "bydns:byaddr". If people want to use the other
6454 order, or indeed, just use one or the other means of lookup, they can
6455 specify it in this variable.
6457 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6458 some operating systems, this comes back from gethostbyaddr() as an empty
6459 string, and this is what Exim used to test for. However, it seems that in
6460 other systems, "." is yielded. Exim now tests for this case too.
6462 7. The values of check_spool_space and check_log_space are now held internally
6463 as a number of kilobytes instead of an absolute number of bytes. If a
6464 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6465 kilobyte. This means that much larger values can be stored.
6467 8. Exim monitor: an attempt to get the action menu when not actually pointing
6468 at a message produces an empty menu entitled "No message selected". This
6469 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6470 no entries in it ("Shell widget menu has zero width and/or height"). So I
6471 have added a single, blank menu entry in this case.
6473 9. Added ${quote_local_part.
6475 10. MIME decoding is now applied to the contents of Subject: header lines when
6478 11. Now that a reference to $sender_host_address automatically causes a reverse
6479 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6480 host lookup before query-style lookups in lists that might use this
6481 variable. This has therefore been abolished, and the "net-" prefix is no
6482 longer necessary for query-style lookups.
6484 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6485 have been a typo for LFLAGS, so it has been changed.
6487 13. The install script calls Exim with "-C /dev/null" in order to find the
6488 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6489 to be output. However, since Exim outputs its version number before the
6490 error, it didn't break the script. It just looked ugly. I fixed this by
6491 always allowing "-C /dev/null" if the caller is root.
6493 14. Ignore overlarge ACL variable number when reading spool file - insurance
6494 against a later release with more variables having written the file.
6496 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6497 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6498 this, as well as the form without the "IPv6" on the front.
6500 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6501 OS/Makefile-Darwin file.
6503 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6504 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6506 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6507 variable. However, some OS use ints for inodes. I've added cast to long int
6508 to get rid of the compiler warning.
6510 19. I had forgotten to lock out "/../" in configuration file names when
6511 ALT_CONFIG_PREFIX was set.
6513 20. Routers used for verification do not need to specify transports. However,
6514 if such a router generated a host list, and callout was configured, Exim
6515 crashed, because it could not find a port number from the (non-existent)
6516 transport. It now assumes port 25 in this circumstance.
6518 21. Added the -t option to exigrep.
6520 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6521 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6522 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6523 them is set, LOOKUP_LSEARCH is forced.
6525 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6527 24. Added sender and host information to the "rejected by local_scan()" log
6528 line; previously there was no indication of these.
6530 25. Added .include_if_exists.
6532 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6533 Linux. It turns out that not all file systems support this. Apparently some
6534 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6535 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6536 not supported on the file descriptor, is now ignored when Exim is trying to
6537 sync a directory. This applies only to Linux.
6539 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6541 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6542 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6545 29. Added support for maildirsize files from supplied patch (modified a bit).
6547 30. The use of :fail: followed by an empty string could lead Exim to respond to
6548 sender verification failures with (e.g.):
6550 550 Verification failed for <xxx>
6551 550 Sender verify failed
6553 where the first response line was missing the '-' that indicates it is not
6554 the final line of the response.
6556 31. The loop for finding the name of the user that called Exim had a hardwired
6557 limit of 10; it now uses the value of finduser_retries, which is used for
6558 all other user lookups.
6560 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6563 33. Exim was neglecting to zero errno before one call of strtol() when
6564 expanding a string and expecting an integer value. On some systems this
6565 resulted in spurious "integer overflow" errors. Also, it was casting the
6566 result into an int without checking.
6568 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6569 did not work. The code looks as if it has *never* worked, though it appears
6570 to have been documented since at least release 1.62. I have made it work.
6572 35. The "timeout_DNS" error in retry rules, also documented since at least
6573 1.62, also never worked. As it isn't clear exactly what this means, and
6574 clearly it isn't a major issue, I have abolished the feature by treating it
6575 as "timeout", and writing a warning to the main and panic logs.
6577 36. The display of retry rules for -brt wasn't always showing the error code
6580 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6581 timeout_connect_A, timeout_connect_MX.
6583 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6584 to the empty sender.
6586 39. The daemon was not analysing the content of -oX till after it had closed
6587 stderr and disconnected from the controlling terminal. This meant that any
6588 syntax errors were only noted on the panic log, and the return code from
6589 the command was 0. By re-arranging the code a little, I've made the
6590 decoding happen first, so such errors now appear on stderr, and the return
6591 code is 1. However, the actual setting up of the sockets still happens in
6592 the disconnected process, so errors there are still only recorded on the
6595 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6596 connections (as happens on some IP stacks) was logged at start up time as
6597 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6598 it from "IPv6 and IPv4", which means that two separate sockets are being
6601 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6602 says whether AF_INET or AF_INET6 was passed as an argument.
6604 42. Exiwhat output was messed up when time zones were included in log
6607 43. Exiwhat now gives more information about the daemon's listening ports,
6608 and whether -tls-on-connect was used.
6610 44. The "port" option of the smtp transport is now expanded.
6612 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6613 silently ignored. Now an error message is written to the main and panic
6616 46. There's a new ACL modifier called "logwrite" which writes to a log file
6617 as soon as it is encountered.
6619 47. Added $local_user_uid and $local_user_gid at routing time.
6621 48. Exim crashed when trying to verify a sender address that was being
6624 49. Exim was recognizing only a space character after ".include". It now also
6625 recognizes a tab character.
6627 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6628 extracting the relevant information from the specification. The man page no
6629 longer contains scrambled data for the -d option, and I've added a section
6630 at the front about calling Exim under different names.
6632 51. Added "extra_headers" argument to the "mail" command in filter files.
6634 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6637 53. Installed eximstats 1.29.
6639 54. Added transport_filter_timeout as a generic transport option.
6641 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6642 Cc: header lines. This was required by RFC 822, but it not required by RFC
6645 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6646 incoming messages that did not have them. Now it does so only if the
6647 message originates locally, that is, if there is no associated remote host
6648 address. When Resent- header lines are present, this applies to the Resent-
6649 lines rather than the non-Resent- lines.
6651 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6652 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6654 58. Messages for configuration errors now include the name of the main
6655 configuration file - useful now that there may be more than one file in a
6656 list (.included file names were always shown).
6658 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6659 for those rare installations that do not start the daemon as root or run it
6660 setuid root. I've cut out the call to initgroups() if the daemon is not
6663 60. The Exim user and group can now be bound into the binary as text strings
6664 that are looked up at the start of Exim's processing.
6666 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6668 62. Added $mailstore_basename variable.
6670 63. Installed patch to sieve.c from Michael Haardt.
6672 64. When Exim failed to open the panic log after failing to open the main log,
6673 the original message it was trying to log was written to stderr and debug
6674 output, but if they were not available (the usual case in production), it
6675 was lost. Now it is written to syslog before the two lines that record the
6676 failures to open the logs.
6678 65. Users' Exim filters run in subprocesses under the user's uid. It is
6679 possible for a "deliver" command or an alias in a "personal" command to
6680 provoke an address rewrite. If logging of address rewriting is configured,
6681 this fails because the process is not running as root or exim. There may be
6682 a better way of dealing with this, but for the moment (because 4.30 needs
6683 to be released), I have disabled address rewrite logging when running a
6684 filter in a non-root, non-exim process.
6690 1. The buildconfig auxiliary program wasn't quoting the value set for
6691 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6692 not defined. This bug was masked in 4.22 by the effect that was fixed in
6695 2. Some messages that were rejected after a message id was allocated were
6696 shown as "incomplete" by exigrep. It no longer does this for messages that
6697 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6699 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6700 have allow_domain_literals set, the ID did not get logged in the <= line.
6701 Domain literals are now always recognized in Message-ID: header lines.
6703 4. The first argument for a ${extract expansion item is the key name or field
6704 number. Leading and trailing spaces in this item were not being ignored,
6705 causing some misleading effects.
6707 5. When deliver_drop_privilege was set, single queue runner processes started
6708 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6709 same command in the process it spins off) were not dropping privilege.
6711 6. When the daemon running as "exim" started a queue runner, it always
6712 re-executed Exim in the spun-off process. This is a waste of effort when
6713 deliver_drop_privilege is set. The new process now just calls the
6714 queue-runner function directly.
6720 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6723 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6724 ignored. Though the use of -oP was forcing the writing of a pid file, it
6725 was always written to the default place.
6727 3. If the message "no IP address found for host xxxx" is generated during
6728 incoming verification, it is now followed by identification of the incoming
6729 connection (so you can more easily find what provoked it).
6731 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6733 5. Added some features to "harden" Exim a bit more against certain attacks:
6735 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6736 be put in Local/Makefile. This is like the never_users runtime option,
6737 but it cannot be overridden. The default setting is "root".
6739 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6740 prefix string with which any file named in a -C command line option
6743 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6744 is retained for -C and -D only if the caller of Exim is root. Without
6745 it, the exim user may also use -C and -D and retain privilege.
6747 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6748 command line option is disabled.
6750 6. Macro names set by the -D option must start with an upper case letter, just
6751 like macro names defined in the configuration file.
6753 7. Added "dereference=" facility to LDAP.
6755 8. Two instances of the typo "uknown" in the source files are fixed.
6757 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6758 the Configure-Makefile script screwed up while processing it.
6760 10. Incorporated PCRE 4.4.
6762 11. The SMTP synchronization check was not operating right at the start of an
6763 SMTP session. For example, it could not catch a HELO sent before the client
6764 waited for the greeting. There is now a check for outstanding input at the
6765 point when the greeting is written. Because of the duplex, asynchronous
6766 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6767 way, but not yet received, when the check is performed.
6769 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6770 on TCP/IP sockets, because this apparently causes some broken clients to
6773 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6774 unchanged) from the Cygwin maintainer.
6776 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6777 was supported instead of testing for mbx. Effectively a typo.
6779 15. The spa authenticator server code was not checking that the input it
6780 received was valid base64.
6782 16. The debug output line for the "set" modifier in ACLs was not showing the
6783 name of the variable that was being set.
6785 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6787 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6788 lookup on its own. Something else was needed to trigger the lookup. For
6789 example, a match in host_lookup or the need for a host name in a host list.
6790 Now, if $sender_host_name is referenced and the host name has not yet been
6791 looked up, a lookup is performed. If the lookup fails, the variable remains
6792 empty, and $host_lookup_failed is set to "1".
6794 19. Added "eqi" as a case-independent comparison operator.
6796 20. The saslauthd authentication condition could segfault if neither service
6797 nor realm was specified.
6799 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6800 error message that was logged was misleading, and incoming SMTP
6801 connections were dropped. The message is now more accurate, and temporary
6802 errors are given to SMTP connections.
6804 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6805 (except RSET) with a 421 error, until QUIT is received. However, it was
6806 failing to send a response to QUIT.
6808 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6809 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6810 ACL is now run after the helo_try_verify_hosts code.
6812 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6813 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6814 case-independent, so other case variants are also recognized). Apparently
6815 some systems use these upper case variants.
6817 25. If more than two messages were waiting for the same host, and a transport
6818 filter was specified for the transport, Exim sent two messages over the
6819 same TCP/IP connection, and then failed with "socket operation on non-
6820 socket" when it tried to send the third.
6822 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6824 27. The extern definition of crypt16() in expand.c was not being excluded when
6825 the OS had its own crypt16() function.
6827 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6828 as a preferred synonym for return_size_limit, both as an option and as an
6831 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6833 30. Changed the default configuration ACL to relax the local part checking rule
6834 for addresses that are not in any local domains. For these addresses,
6835 slashes and pipe symbols are allowed within local parts, but the sequence
6836 /../ is explicitly forbidden.
6838 31. SPA server authentication was not clearing the challenge buffer before
6841 32. log_message in a "warn" ACL statement was writing to the reject log as
6842 well as to the main log, which contradicts the documentation and doesn't
6843 seem right (because no rejection is happening). So I have stopped it.
6845 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6846 However, I am unable to do any testing of this.
6848 34. Fixed an infelicity in the appendfile transport. When checking directories
6849 for a mailbox, to see if any needed to be created, it was accidentally
6850 using path names with one or more superfluous leading slashes; tracing
6851 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6853 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6854 contents are added to the log line that is written for every discarded
6855 recipient. (Previously a log_message setting was ignored.)
6857 36. The ${quote: operator now quotes the string if it is empty.
6859 37. The install script runs exim in order to find its version number. If for
6860 some reason other than non-existence or emptiness, which it checks, it
6861 could not run './exim', it was installing it with an empty version number,
6862 i.e. as "exim-". This error state is now caught, and the installation is
6865 38. An argument was missing from the function that creates an error message
6866 when Exim fails to connect to the socket for saslauthd authentication.
6867 This could cause Exim to crash, or give a corrupted message.
6869 39. Added isip, isip4, and isip6 to ${if conditions.
6871 40. The ACL variables $acl_xx are now saved with the message, and can be
6872 accessed later in routers, transports, and filters.
6874 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6875 strings in the file are not string-expanded.
6877 42. If a MAIL command specified a SIZE value that was too large to fit into an
6878 int variable, the check against message_size_limit failed. Such values are
6879 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6880 day this will have to be increased, but I don't think I want to be around
6881 when emails are that large.
6888 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6889 iconv() is not standard in FreeBSD.
6891 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6892 IPv6 enabled. The observed symptom was a segmentation fault on return from
6893 the function os_common_find_running_interfaces() in src/os.c.
6895 3. In the check_special_case() function in daemon.c I had used "errno" as an
6896 argument name, which causes warnings on some systems. This was basically a
6897 typo, since it was named "eno" in the comments!
6899 4. The code that waits for the clock to tick (at a resolution of some fraction
6900 of a second) so as to ensure message-id uniqueness was always waiting for
6901 at least one whole tick, when it could have waited for less. [This is
6902 almost certainly not relevant at current processor speeds, where it is
6903 unlikely to ever wait at all. But we try to future-proof.]
6905 5. The function that sleeps for a time interval that includes fractions of a
6906 second contained a race. It did not block SIGALRM between setting the
6907 timer, and suspending (a couple of lines later). If the interval was short
6908 and the sigsuspend() was delayed until after it had expired, the suspension
6909 never ended. On busy systems this could lead to processes getting stuck for
6912 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6913 process, before it forks any delivery processes. The open lookup caching
6914 mechanism meant that the open file or database connection was passed into
6915 the delivery process. The problem was that delivery processes always tidy
6916 up cached lookup data. This could cause a problem for the next delivery
6917 process started by the queue runner, because the external queue runner
6918 process does not know about the closure. So the next delivery process
6919 still has data in the lookup cache. In the case of a file lookup, there was
6920 no problem because closing a file descriptor in a subprocess doesn't affect
6921 the parent. However, if the lookup was caching a connection to a database,
6922 the connection was closed, and the second delivery process was likely to
6923 see errors such as "PGSQL: query failed: server closed the connection
6924 unexpectedly". The problem has been fixed by closing all cached lookups
6925 in a queue runner before running a delivery process.
6927 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6928 seem to have the "const" qualifier which it has on other OS. I've
6931 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6932 *of the same type* (client or server) with the same public name that an
6933 error should be diagnosed.
6935 9. When Exim looked up a host name for an IP address, but failed to find the
6936 original IP address when looking up the host name (a safety check), it
6937 output the message "<ip address> does not match any IP for NULL", which was
6938 confusing, to say the least. The bug was that the host name should have
6939 appeared instead of "NULL".
6941 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6942 user that is built into the binary, and the -C or -D options is used, root
6943 privilege is dropped before the configuration file is read. In addition,
6944 logging is switched to stderr instead of the normal log files. If the
6945 configuration then re-defines the Exim user, the unprivileged environment
6946 is probably not what is expected, so Exim logs a panic warning message (but
6949 However, if deliver_drop_privilege is set, the unprivileged state may well
6950 be exactly what is intended, so the warning has been cut out in that case,
6951 and Exim is allowed to try to write to its normal log files.
6957 1. smtp_return_error_details was not giving details for temporary sender
6958 or receiver verification errors.
6960 2. Diagnose a configuration error if two authenticators have the same public
6963 3. Exim used not to create the message log file for a message until the first
6964 delivery attempt. This could be confusing when incoming messages were held
6965 for policy or load reasons. The message log file is now created at the time
6966 the message is received, and an initial "Received" line is written to it.
6968 4. The automatically generated man page for command line options had a minor
6969 bug that caused no ill effects; however, a more serious problem was that
6970 the procedure for building the man page automatically didn't always
6971 operate. Consequently, release 4.20 contains an out-of-date version. This
6972 shouldn't happen again.
6974 5. When building Exim with embedded Perl support, the script that builds the
6975 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6976 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6978 6. The freeze_tell option was not being used for messages that were frozen on
6979 arrival, either by an ACL or by local_scan().
6981 7. Added the smtp_incomplete_transaction log selector.
6983 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6984 was accepting AUTH without a new EHLO.
6986 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6987 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6990 10. Logging of TCP/IP connections (when configured) now happens in the main
6991 daemon process instead of the child process, so that the TCP/IP connection
6992 count is more accurate (but it can never be perfect).
6994 11. The use of "drop" in a nested ACL was not being handled correctly in the
6995 outer ACL. Now, if condition failure induced by the nested "drop" causes
6996 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6997 or "require"), the connection is dropped.
6999 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7000 that yield "discard" can now be used with an "accept" or a "discard" verb,
7001 but an error is generated for any others (because I can't see a useful way
7002 to define what should happen).
7004 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7005 are now processed in the same way as lines in the Exim configuration file.
7006 In particular, continuation lines are supported.
7008 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7010 15. Added -ti meaning -t -i.
7012 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7013 domains, and warn by logging if others are found.
7015 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7016 returned from GIFCONF when Exim is trying to find the list of interfaces on
7017 a host. The code in os.c has been modified to copy each ifreq to an aligned
7018 structure in all cases.
7020 Also, in some cases, the returned ifreq's were being copied to a 'struct
7021 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7022 means the last couple of bytes of an IPv6 address could be chopped if the
7023 ifreq contained only a normal sockaddr (14 bytes storage).
7025 18. Named domain lists were not supported in the hosts_treat_as_local option.
7026 An entry such as +xxxx was not recognized, and was treated as a literal
7029 19. Ensure that header lines added by a DATA ACL are included in the reject log
7030 if the ACL subsequently rejects the message.
7032 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7033 MD5 (which is deprecated).
7035 21. When testing a filter file using -bf, Exim was writing a message when it
7036 took the sender from a "From " line in the message, but it was not doing so
7037 when it took $return_path from a Return-Path: header line. It now does.
7039 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7040 with a valid header line field name (a series of printing characters
7041 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7043 23. Changed "disc" in the source to "disk" to conform to the documentation and
7044 the book and for uniformity.
7046 24. Ignore Sendmail's -Ooption=value command line item.
7048 25. When execve() failed while trying to run a command in a pipe transport,
7049 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7050 could be confused with a return value of 69 from the command itself. This
7051 has been changed to 127, the value the shell returns if it is asked to run
7052 a non-existent command. The wording for the related log line suggests a
7053 non-existent command as the problem.
7055 26. If received_header_text expands to an empty string, do not add a Received:
7056 header line to the message. (Well, it adds a token one on the spool, but
7057 marks it "old" so that it doesn't get used or transmitted.)
7059 27. Installed eximstats 1.28 (addition of -nt option).
7061 28. There was no check for failure on the call to getsockname() in the daemon
7062 code. This can fail if there is a shortage of resources on the system, with
7063 ENOMEM, for example. A temporary error is now given on failure.
7065 29. Contrary to the C standard, it seems that in some environments, the
7066 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7067 program. Exim now does this explicitly; it affects the formatting of
7068 timestamps using strftime().
7070 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7071 complaints. I've now initialized all the variables, to avoid this.
7073 32. Header lines added by a system filter were not being "seen" during
7074 transport-time rewrites.
7076 33. The info_callback() function passed to OpenSSL is set up with type void
7077 (*)(SSL *, int, int), as described somewhere. However, when calling the
7078 function (actually a macro) that sets it up, the type void(*)() is
7079 expected. I've put in a cast to prevent warnings from picky compilers.
7081 34. If a DNS black list lookup found a CNAME record, but there were no A
7082 records associated with the domain it pointed at, Exim crashed.
7084 35. If a DNS black list lookup returned more than one A record, Exim ignored
7085 all but the first. It now scans all returned addresses if a particular IP
7086 value is being sought. In this situation, the contents of the
7087 $dnslist_value variable are a list of all the addresses, separated by a
7090 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7091 to accept a host name and all its aliases if the forward lookup for any of
7092 them yielded the IP address of the incoming connection. Now it accepts only
7093 those names whose forward lookup yields the correct IP address. Any other
7094 names are discarded. This closes a loophole whereby a rogue DNS
7095 administrator could create reverse DNS records to break through a
7096 wildcarded host restriction in an ACL.
7098 37. If a user filter or a system filter that ran in a subprocess used any of
7099 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7100 the wrong values were passed to the pipe command ($thisaddress had the
7101 value of $0, $0 had the value of $1, etc). This bug was introduced by
7102 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7104 38. Improved the line breaking for long SMTP error messages from ACLs.
7105 Previously, if there was no break point between 40 and 75 characters, Exim
7106 left the rest of the message alone. Two changes have been made: (a) I've
7107 reduced the minimum length to 35 characters; (b) if it can't find a break
7108 point between 35 and 75 characters, it looks ahead and uses the first one
7109 that it finds. This may give the occasional overlong line, but at least the
7110 remaining text gets split now.
7112 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7113 file descriptors might be low, and that setting 1000 would always raise it.
7114 It turns out that in some environments, the limit is already over 1000 and
7115 that lowering it causes trouble. So now Exim takes care not to decrease it.
7117 40. When delivering a message, the value of $return_path is set to $sender_
7118 address at the start of routing (routers may change the value). By an
7119 oversight, this default was not being set up when an address was tested by
7120 -bt or -bv, which affected the outcome if any router or filter referred to
7123 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7124 log only when "message" or "log_message" are set. However, if one of the
7125 conditions was an address verification, or a call to a nested ACL, the
7126 messages generated by the underlying test were being passed through. This
7127 no longer happens. The underlying message is available in $acl_verify_
7128 message for both "message" and "log_message" expansions, so it can be
7129 passed through if needed.
7131 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7132 new expansion $bh_ to give the encoded byte string without charset
7133 translation. Translation happens only if iconv() is available; HAVE_ICONV
7134 indicates this at build time. HEADERS_CHARSET gives the charset to
7135 translate to; headers_charset can change it in the configuration, and
7136 "headers charset" can change it in an individual filter file.
7138 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7139 that creates RFC 2047 encoded "words" labels them as that charset instead
7140 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7141 expansion operator; (ii) when Exim creates a From: line for a local
7142 message; (iii) when a header line is rewritten to include a "phrase" part.
7144 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7145 buggy, causing it to skip the first lines of messages whose message ID
7146 ended in 'D'. This would not have bitten before Exim release 4.14, because
7147 message IDs were unlikely to end in 'D' before then. The effect was to have
7148 incorrect size information for certain domains.
7150 45. #include "config.h" was missing at the start of the crypt16.c module. This
7151 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7154 46. If there was a timeout during a "random" callout check, Exim treated it as
7155 a failure of the random address, and carried on sending RSET and the real
7156 address. If the delay was just some slowness somewhere, the response to the
7157 original RCPT would be taken as a response to RSET and so on, causing
7158 mayhem of various kinds.
7160 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7161 when I implemented it. It didn't allow for the fact that some option values
7162 may legitimately be negative (e.g. size_addition), and it didn't even do
7163 the right test for positive values.
7165 48. Domain names in DNS records are case-independent. Exim always looks them up
7166 in lower case. Some resolvers return domain names in exactly the case they
7167 appear in the zone file, that is, they may contain uppercase letters. Not
7168 all resolvers do this - some return always lower case. Exim was treating a
7169 change of case by a resolver as a change of domain, similar to a widening
7170 of a domain abbreviation. This triggered its re-routing code and so it was
7171 trying to route what was effectively the same domain again. This normally
7172 caused routing to fail (because the router wouldn't handle the domain
7173 twice). Now Exim checks for this case specially, and just changes the
7174 casing of the domain that it ultimately uses when it transmits the message
7177 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7180 50. If a filter generated a file delivery with a non-absolute name (possible if
7181 no home directory exists for the router), the forbid_file option was not
7184 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7185 the existing equality matching.
7187 52. Exim was using ints instead of ino_t variables in some places where it was
7188 dealing with inode numbers.
7190 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7191 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7192 called TMPDIR, and if it finds it is different, it changes its value.
7194 54. The smtp_printf() function is now made available to local_scan() so
7195 additional output lines can be written before returning. There is also an
7196 smtp_fflush() function to enable the detection of a dropped connection.
7197 The variables smtp_input and smtp_batched_input are exported to
7200 55. Changed the default runtime configuration: the message "Unknown user"
7201 has been removed from the ACL, and instead placed on the localuser router,
7202 using the cannot_route_message feature. This means that any verification
7203 failures that generate their own messages won't get overridden. Similarly,
7204 the "Unrouteable address" message that was in the ACL for unverifiable
7205 relay addresses has also been removed.
7207 56. Added hosts_avoid_esmtp to the smtp transport.
7209 57. The exicyclog script was not checking for the esoteric option
7210 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7211 will work only if exicyclog is run under the appropriate euid.
7213 58. Following a discussion on the list, the rules by which Exim recognises line
7214 endings on incoming messages have been changed. The -dropcr and drop_cr
7215 options are now no-ops, retained only for backwards compatibility. The
7216 following line terminators are recognized: LF CRLF CR. However, special
7217 processing applies to CR:
7219 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7220 nor a local message in the state where . is a terminator.
7222 (ii) If a bare CR is encountered in a header line, an extra space is added
7223 after the line terminator so as not to end the header. The reasoning
7224 behind this is that bare CRs in header lines are most likely either
7225 to be mistakes, or people trying to play silly games.
7227 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7228 was being incorrectly given as 18 bytes larger than it should have been.
7229 This is a VOB (very old bug).
7231 60. This may never have affected anything current, but just in case it has:
7232 When the local host is found other than at the start of a list of hosts,
7233 the local host, those with the same MX, and any that follow, are discarded.
7234 When the list in question was part of a longer list of hosts, the following
7235 hosts (not currently being processed) were also being discarded. This no
7236 longer happens. I'm not sure if this situation could ever has previously
7239 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7242 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7243 header. This is something that is recommended in a new Internet Draft, and
7244 is something that is documented as being done by Sendmail. There are two
7245 possible values. For messages generated by the autoreply transport, Exim
7248 Auto-Submitted: auto-replied
7250 whereas for all other generated messages (e.g. bounces) it adds
7252 Auto-Submitted: auto-generated
7254 63. The "personal" condition in filters now includes a test for the
7255 Auto-Submitted: header. If it contains the string "auto-" the message it
7256 not considered personal.
7258 64. Added rcpt_include_affixes as a generic transport option.
7260 65. Added queue_only_override (default true).
7262 66. Added the syslog_duplication option.
7264 67. If what should have been the first header line of a message consisted of
7265 a space followed by a colon, Exim was mis-interpreting it as a header line.
7266 It isn't of course - it is syntactically invalid and should therefore be
7267 treated as the start of the message body. The misbehaviour could have
7268 caused a number of strange effects, including loss of data in subsequent
7269 header lines, and spool format errors.
7271 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7272 client host had authenticated. This control can now be exercised by an ACL
7273 for more flexibility.
7275 69. By default, callouts do not happen when testing with -bh. There is now a
7276 variant, -bhc, which does actually run the callout code, including
7277 consulting and updating the callout cache.
7279 70. Added support for saslauthd authentication, courtesy of Alexander
7282 71. If statvfs() failed on the spool or log directories while checking their
7283 size for availability, Exim confusingly gave the error "space shortage".
7284 Furthermore, in debugging mode it crashed with a floating point exception.
7285 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7286 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7287 serious problem, Exim now writes to the main and panic logs when this
7288 happens, with details of the failure. It then refuses to accept the
7289 incoming message, giving the message "spool directory problem" or "log
7290 directory problem" with a 421 code for SMTP messages.
7292 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7293 0, 1, and 2 exist, because some OS complain for execs without them (see
7294 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7295 descriptors. However, the code omitted to check that the open succeeded,
7296 causing mysterious errors if for some reason the permissions on /dev/null
7297 got screwed. Now Exim writes a message to the main and panic logs, and
7298 bombs out if it can't open /dev/null.
7300 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7301 interact so that it is all more flexible. It is supposed to remain
7302 backwards compatible. Also added extra_local_interfaces.
7304 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7305 to bomb out with an assertion failure - to the client this appears as a
7306 connection drop. This problem occurs in the part of the code that was taken
7307 from the Samba project. Fortunately, the assertion is in a very simple
7308 function, so I have fixed this by reproducing the function inline in the
7309 one place where it is called, and arranging for authentication to fail
7310 instead of killing the process with assert().
7312 75. The SPA client code was not working when the server requested OEM rather
7313 than Unicode encoding.
7315 76. Added code to make require_files with a specific uid setting more usable in
7316 the case where statting the file as root fails - usually a non-root-mounted
7317 NFS file system. When this happens and the failure is EACCES, Exim now
7318 forks a subprocess and does the per-uid checking as the relevant uid.
7320 77. Added process_log_path.
7322 78. If log_file_path was not explicitly set, a setting of check_log_space or
7323 check_log_inodes was ignored.
7325 79. If a space check for the spool or log partitions fails, the incident is now
7326 logged. Of course, in the latter case the data may get lost...
7328 80. Added the %p formatting code to string_format() so that it can be used to
7329 print addresses in debug_print(). Adjusted all the address printing in the
7330 debugging in store.c to use %p rather than %d.
7332 81. There was a concern that a line of code in smtp_in.c could overflow a
7333 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7334 initially expressed, the concern was not well-founded, because trailing
7335 spaces are removed early. However, if the trailing spaces were followed by
7336 a NULL, they did not get removed, so the overflow was possible. Two fixes
7339 (a) I re-wrote the offending code in a cleaner fashion.
7340 (b) If an incoming SMTP command contains a NULL character, it is rejected
7343 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7344 runs initgroups(), so that if the Exim user is in any additional groups,
7345 they will be used during message reception.
7351 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob