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 GnuTLS: repeat lowlevel read and write operations while they return error
12 codes indicating retry. Under TLS1.3 this becomes required.
18 JH/01 Remove code calling the customisable local_scan function, unless a new
19 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
21 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
22 non-signal-safe functions being used.
24 JH/03 Bug 2269: When presented with a received message having a stupidly large
25 number of DKIM-Signature headers, disable DKIM verification to avoid
26 a resource-consumption attack. The limit is set at twenty.
28 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
29 report of oldest_pass in ${authres } in consequence, and separate out
30 some descriptions of reasons for verification fail.
32 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
33 files in the spool were present and unlocked. A queue-runner could spot
34 them, resulting in a duplicate delivery. Fix that by doing the unlock
35 after the unlink. Investigation by Tim Stewart. Take the opportunity to
36 add more error-checking on spoolfile handling while that code is being
39 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
40 No known attacks, no CVE, this is defensive hardening.
42 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
43 a queue-runner could start a delivery while other operations were ongoing.
44 Cutthrough delivery was a common victim, resulting in duplicate delivery.
45 Found and investigated by Tim Stewart. Fix by using the open message data
46 file handle rather than opening another, and not locally closing it (which
47 releases a lock) for that case, while creating the temporary .eml format
48 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
50 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
51 $sender_verify_failure/$recipient_verify_failure to "random".
53 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
56 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
57 Previously this would segfault.
59 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
62 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
63 like zero, since the resolver should be doing this for us, But we need one
64 as a CNAME but no MX presence gets the CNAME returned; we need to check
65 that doesn't point to an MX to declare it "no MX returned" rather than
66 "error, loop". A new main option is added so the older capability of
67 following some limited number of chain links is maintained.
69 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
71 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
72 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
73 now-deprecated earlier definitions used only specified the range up to TLS
74 1.2 (in the older-version library docs).
76 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
78 JH/15 Rework TLS client-side context management. Stop using a global, and
79 explicitly pass a context around. This enables future use of TLS for
80 connections to service-daemons (eg. malware scanning) while a client smtp
81 connection is using TLS; with cutthrough connections this is quite likely.
83 JH/16 Fix ARC verification to do AS checks in reverse order.
85 JH/17 Support a "tls" option on the ${readsocket } expansion item.
87 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
88 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
89 Previously the "utf8" would be re-prepended for every additional message.
91 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
92 Previously thery were accepted, resulting in issues when attempting to
93 forward messages to a non-supporting MTA.
95 PP/02 Let -n work with printing macros too, not just options.
97 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
98 one parent address was copied, and bogus data was used at delivery-logging
99 time. Either a crash (after delivery) or bogus log data could result.
100 Discovery and analysis by Tim Stewart.
102 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
103 Previously if the string ended mid-character, we did not insert the
104 promised '?' replacement.
106 PP/04 Documentation: current string operators work on bytes, not codepoints.
108 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
109 should pack well giving a smaller memory footprint so better caching and
110 therefore performance. Group the declarations where this can't be done so
111 that the byte-sized flag variables are not interspersed among pointer
112 variables, giving a better chance of good packing by the compiler.
114 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
115 non-null, to avoid issues with sites running BATV. Previously reports were
116 sent with an empty envelope sender so looked like bounces.
118 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
119 The ignore_error flag wasn't being returned from the filter subprocess so
120 was not set for later routers. Investigation and fix by Matthias Kurz.
122 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
123 and a msg:complete for the whole, when a message is manually removed using
124 -Mrm. Developement by Matthias Kurz, hacked on by JH.
126 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
127 a "Gnu special" function, asprintf() in the DB utility binary builds; I
128 hope that is portable enough.
130 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
131 requiring a known-CA anchor certificate; make it now rely entirely on the
132 TLSA as an anchor. Checking the name on the leaf cert against the name
133 on the A-record for the host is still done for TA (but not for EE mode).
135 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
136 included in delivery lines for non-proxied connections, when compiled with
137 SUPPORT_SOCKS and running with proxy logging enabled.
139 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
140 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
141 move the existing event to fire before the normal logging of message
142 failure so that custom logging is bracketed by normal logging.
144 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
145 msg:fail:internal event. Developement by Matthias Kurz.
147 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
148 far too small for todays use of crypto signatures stored there. Go all
149 the way to the max DNS message size of 64kB, even though this might be
150 overmuch for IOT constrained device use.
152 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
153 copy a string over itself. The library routine is documented as not
154 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
156 JH/32 For main options check_spool_space and check_inode_space, where the
157 platform supports 64b integers, support more than the previous 2^31 kB
158 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
159 the previous G, M, k.
161 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
162 $authenticated_fail_id variable on authentication failure. Previously
165 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
166 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
167 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
168 GNUTLS_SEC_PARAM_MEDIUM.
170 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
171 side. Previously we would continue as if no SNI had been received.
173 JH/36 Harden the handling of string-lists. When a list consisted of a sole
174 "<" character, which should be a list-separator specification, we walked
175 off past the nul-terimation.
177 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
178 causes) even when the retry time is not yet met. Previously they were
179 not, meaning that when (say) an account was over-quota and temp-rejecting,
180 and multiple senders' messages were queued, only one sender would get
181 notified on each configured delay_warning cycle.
187 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
188 When redis_servers is set to a list of > 1 element, and the Redis servers
189 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
190 case of MOVED into a DEFER case instead, thus moving the query onto the
191 next server in the list. For a cluster of N elements, all N servers must
192 be defined in redis_servers.
194 GF/02 Catch and remove uninitialized value warning in exiqsumm
195 Check for existence of @ARGV before looking at $ARGV[0]
197 JH/01 Replace the store_release() internal interface with store_newblock(),
198 which internalises the check required to safely use the old one, plus
199 the allocate and data copy operations duplicated in both (!) of the
200 extant use locations.
202 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
203 modifier. This matches the restriction on the commandline.
205 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
206 Previously only the last row was returned.
208 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
209 we assumed that tags in the header were well-formed, and parsed the
210 element content after inspecting only the first char of the tag.
211 Assumptions at that stage could crash the receive process on malformed
214 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
215 While running the DKIM ACL we operate on the Permanent memory pool so that
216 variables created with "set" persist to the DATA ACL. Also (at any time)
217 DNS lookups that fail create cache records using the Permanent pool. But
218 expansions release any allocations made on the current pool - so a dnsdb
219 lookup expansion done in the DKIM ACL releases the memory used for the
220 DNS negative-cache, and bad things result. Solution is to switch to the
221 Main pool for expansions.
222 While we're in that code, add checks on the DNS cache during store_reset,
223 active in the testsuite.
224 Problem spotted, and debugging aided, by Wolfgang Breyha.
226 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
227 When none of the hosts presented to a transport match an already-open
228 connection, close it and proceed with the list. Previously we would
229 queue the message. Spotted by Lena with Yahoo, probably involving
232 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
233 Previously a spurious "250 OK id=" response was appended to the proper
236 JH/08 The "support for" informational output now, which built with Content
237 Scanning support, has a line for the malware scanner interfaces compiled
238 in. Interface can be individually included or not at build time.
240 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
241 by the template makefile "src/EDITME". The "STREAM" support for an older
242 ClamAV interface method is removed.
244 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
245 rows affected is given instead).
247 JH/11 The runtime Berkeley DB library version is now additionally output by
248 "exim -d -bV". Previously only the compile-time version was shown.
250 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
251 SMTP connection. Previously, when one had more receipients than the
252 first, an abortive onward connection was made. Move to full support for
253 multiple onward connections in sequence, handling cutthrough connection
254 for all multi-message initiating connections.
256 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
257 routers. Previously, a multi-recipient message would fail to match the
258 onward-connection opened for the first recipient, and cause its closure.
260 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
261 a timeout on read on a GnuTLS initiating connection, resulting in the
262 initiating connection being dropped. This mattered most when the callout
263 was marked defer_ok. Fix to keep the two timeout-detection methods
266 JH/15 Relax results from ACL control request to enable cutthrough, in
267 unsupported situations, from error to silently (except under debug)
268 ignoring. This covers use with PRDR, frozen messages, queue-only and
271 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
273 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
274 metadata, resulting in a crash in free().
276 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
277 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
278 Broken also in d185889f4, with init system revamp.
280 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
281 Previously we abruptly closed the connection after reading a malware-
282 found indication; now we go on to read the "scan ok" response line,
285 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
286 ACL. Previously, a crash would result.
288 JH/19 Speed up macro lookups during configuration file read, by skipping non-
289 macro text after a replacement (previously it was only once per line) and
290 by skipping builtin macros when searching for an uppercase lead character.
292 JH/20 DANE support moved from Experimental to mainline. The Makefile control
293 for the build is renamed.
295 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
296 was allocated for every new TLS startup, meaning one per message. Fix
297 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
299 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
300 reported the original. Fix to report (as far as possible) the ACL
301 result replacing the original.
303 JH/23 Fix memory leak during multi-message connections using STARTTLS under
304 OpenSSL. Certificate information is loaded for every new TLS startup,
305 and the resources needed to be freed.
307 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
309 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
312 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
313 DATA response info to the (existing) per-recipient response info for
314 the "C=" log element. It can have useful tracking info from the
315 destination system. Patch from Simon Arlott.
317 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
318 length value. Previously this would segfault.
320 HS/02 Support Avast multiline protoocol, this allows passing flags to
321 newer versions of the scanner.
323 JH/28 Ensure that variables possibly set during message acceptance are marked
324 dead before release of memory in the daemon loop. This stops complaints
325 about them when the debug_store option is enabled. Discovered specifically
326 for sender_rate_period, but applies to a whole set of variables.
327 Do the same for the queue-runner and queue-list loops, for variables set
328 from spool message files. Do the same for the SMTP per-message loop, for
329 certain variables indirectly set in ACL operations.
331 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
332 as a multi-recipient message from a mailinglist manager). The coding had
333 an arbitrary cutoff number of characters while checking for more input;
334 enforced by writing a NUL into the buffer. This corrupted long / fast
335 input. The problem was exposed more widely when more pipelineing of SMTP
336 responses was introduced, and one Exim system was feeding another.
337 The symptom is log complaints of SMTP syntax error (NUL chars) on the
338 receiving system, and refused recipients seen by the sending system
339 (propating to people being dropped from mailing lists).
340 Discovered and pinpointed by David Carter.
342 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
343 replaced by the ${authresults } expansion.
345 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
347 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
348 allows proper process termination in container environments.
350 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
351 Previously the "final dot" had a newline after it; ensure it is CR,LF.
353 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
354 and "err_perm", deprecated since 4.83 when the RFC-defined words
355 "temperror" and "permerror" were introduced.
357 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
358 transport-filters or DKIM-signing. The restriction was lost in the
359 consolidation of verify-callout and delivery SMTP handling.
360 Extend the restriction to also cover ARC-signing.
362 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
363 in defer=pass mode supply a 450 to the initiator. Previously the message
366 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
367 tls_require_ciphers is used as before.
369 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
370 "pass_unscanned". Only tmpfails from the scanner are written to
371 the paniclog, as they may require admin intervention (permission
372 denied, license issues). Other scanner errors (like decompression
373 bombs) do not cause a paniclog entry.
375 JH/36 Fix reinitialisation of DKIM logging variable between messages.
376 Previously it was possible to log spurious information in receive log
379 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
380 triggered odd behaviour from Outlook Express clients.
382 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
385 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
386 since the IETF WG has not yet settled on that versus the original
387 "bare" representation.
389 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
390 Previously the millisecond value corrupted the output.
391 Fix also for syslog_pid=no and log_selector +pid, for which the pid
392 corrupted the output.
398 JH/01 Rework error string handling in TLS interface so that the caller in
399 more cases is responsible for logging. This permits library-sourced
400 string to be attached to addresses during delivery, and collapses
401 pairs of long lines into single ones.
403 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
404 during configuration. Wildcards are allowed and expanded.
406 JH/02 Rework error string handling in DKIM to pass more info back to callers.
407 This permits better logging.
409 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
410 do not close it down and have the child transport start it up again on
411 the passed-on TCP connection. Instead, proxy the child (and any
412 subsequent ones) for TLS via a unix-domain socket channel. Logging is
413 affected: the continued delivery log lines do not have any DNSSEC, TLS
414 Certificate or OCSP information. TLS cipher information is still logged.
416 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
417 identical IP addresses on different listening ports. Will also affect
420 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
421 add noisy ifdef guards to special-case this sillyness.
422 Patch from Bernd Kuhls.
424 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
425 than 255 are no longer allowed.
427 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
428 Disable the session-cache too, which might reduce our load. Since we
429 currrectly use a new context for every connection, both as server and
430 client, there is no benefit for these.
431 GnuTLS appears to not support tickets server-side by default (we don't
432 call gnutls_session_ticket_enable_server()) but client side is enabled
433 by default on recent versions (3.1.3 +) unless the PFS priority string
436 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
437 <https://reproducible-builds.org/specs/source-date-epoch/>.
439 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
440 the check for any unsuccessful recipients did not notice the limit, and
441 erroneously found still-pending ones.
443 JH/08 Pipeline CHUNKING command and data together, on kernels that support
444 MSG_MORE. Only in-clear (not on TLS connections).
446 JH/09 Avoid using a temporary file during transport using dkim. Unless a
447 transport-filter is involved we can buffer the headers in memory for
448 creating the signature, and read the spool data file once for the
449 signature and again for transmission.
451 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
452 4.77 as the kernel support then wasn't solid, having issues in 64bit
453 mode. Now, it's been long enough. Add support for FreeBSD also.
455 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
456 case where the routing stage had gathered several addresses to send to
457 a host before calling the transport for the first, we previously failed
458 to close down TLS in the old transport process before passing the TCP
459 connection to the new process. The new one sent a STARTTLS command
460 which naturally failed, giving a failed delivery and bloating the retry
461 database. Investigation and fix prototype from Wolfgang Breyha.
463 JH/12 Fix check on SMTP command input synchronisation. Previously there were
464 false-negatives in the check that the sender had not preempted a response
465 or prompt from Exim (running as a server), due to that code's lack of
466 awareness of the SMTP input buffering.
468 PP/04 Add commandline_checks_require_admin option.
469 Exim drops privileges sanely, various checks such as -be aren't a
470 security problem, as long as you trust local users with access to their
471 own account. When invoked by services which pass untrusted data to
472 Exim, this might be an issue. Set this option in main configuration
473 AND make fixes to the calling application, such as using `--` to stop
476 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
477 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
478 responses to those, into a single TLS record each way (this usually means
479 a single packet). As a side issue, smtp_enforce_sync now works on TLS
482 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
483 affects you only if you're dancing at the edge of the param size limits.
484 If you are, and this message makes sense to you, then: raise the
485 configured limit or use OpenSSL 1.1. Nothing we can do for older
488 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
489 cmdline element to get the documented default one. Previously it was
492 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
493 are unsuable for non-message-specific reasons - eg. connection timeout,
494 banner-time rejection.
496 JH/16 Fix logging of delivery remote port, when specified by router, under
499 PP/06 Repair manualroute's ability to take options in any order, even if one
500 is the name of a transport.
503 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
505 JH/17 Change the list-building routines interface to use the expanding-string
506 triplet model, for better allocation and copying behaviour.
508 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
509 Previously it was constructed the first time a possibly-matching string
510 was met in the configuration file input during startup; now it is done
513 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
514 compatible one, to avoid the (poorly documented) possibility of a config
515 file in the working directory redirecting the DB files, possibly correpting
516 some existing file. CVE-2017-10140 assigned for BDB.
518 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
519 cache-hot. Previously, although the result was properly cached, the
520 initial verify call returned a defer.
522 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
523 the main verify for receipient in uncached-mode.
525 JH/22 Retire historical build files to an "unsupported" subdir. These are
526 defined as "ones for which we have no current evidence of testing".
528 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
529 if present. Previously it was ignored.
531 JH/24 Start using specified-initialisers in C structure init coding. This is
532 a C99 feature (it's 2017, so now considered safe).
534 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
535 if was a fixed-sized field and bitmask ops via macros; it is now more
538 PP/07 GitHub PR 56: Apply MariaDB build fix.
539 Patch provided by Jaroslav Škarvada.
541 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
542 during Coverity cleanups [4.87 JH/47]
543 Diagnosis and fix provided by Michael Fischer v. Mollard.
545 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
546 the right size to place the terminating semicolon on its own folded
547 line, the header hash was calculated to an incorrect value thanks to
548 the (relaxed) space the fold became.
550 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
551 and confused the parent.
553 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
554 which could crash as a result. This could lead to undeliverable messages.
556 JH/28 Logging: "next input sent too soon" now shows where input was truncated
559 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
560 matters on fast-turnover and PID-randomising systems, which were getting
561 out-of-order delivery.
563 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
564 a possibly-overlapping copy. The symptom was that "Remote host closed
565 connection in response to HELO" was logged instead of the actual 4xx
568 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
569 Previously only that bufferd was discarded, resulting in SYMTP command
572 JH/32 DKIM: when a message has multiple signatures matching an identity given
573 in dkim_verify_signers, run the dkim acl once for each. Previously only
574 one run was done. Bug 2189.
576 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
577 "panic the current process" to "deliberately defer". The panic log is
578 still written with the problem list name; the mail and reject logs now
579 get a temp-reject line for the message that was being handled, saying
580 something like "domains check lookup or other defer". The SMTP 451
581 message is still "Temporary local problem".
583 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
584 A crafted sequence of BDAT commands could result in in-use memory beeing
585 freed. CVE-2017-16943.
587 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
588 from SMTP input. Previously it was always done; now only done for DATA
589 and not BDAT commands. CVE-2017-16944.
591 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
592 to the message (such as an overlong header line). Previously this was
593 not done and we did not exit BDAT mode. Followon from the previous item
594 though a different problem.
600 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
601 than -2003 did; needs libidn2 in addition to libidn.
603 JH/02 The path option on a pipe transport is now expanded before use.
605 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
606 Patch provided by "Björn", documentation fix added too.
608 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
609 missing a wire-to-host endian conversion.
611 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
612 close after a BDAT command line could be taken as a following command,
613 giving a synch failure. Fix by only checking for synch immediately
614 before acknowledging the chunk.
616 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
617 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
618 macro. Patches provided by Josh Soref.
620 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
621 Previously we did not; the RFC seems ambiguous and VRFY is not listed
622 by IANA as a service extension. However, John Klensin suggests that we
625 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
626 the dkim code may be unix-mode line endings rather than smtp wire-format
627 CRLF, so prepend a CR to any bare LF.
629 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
630 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
632 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
633 the first were themselves being wrongly included in the feed into dkim
634 processing; with most chunk sizes in use this resulted in an incorrect
635 body hash calculated value.
637 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
638 DKIM signature block, for verification. Although advised against by
639 standards it is specifically not ruled illegal.
641 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
643 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
644 missing a body hash (the bh= tag).
646 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
647 It seems that HAProxy sends the Proxy Protocol information in clear and
648 only then does a TLS startup, so do the same.
650 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
651 TCP connections (such as for Spamd) unless the daemon successfully set
652 Fast Open mode on its listening sockets. This fixes breakage seen on
653 too-old kernels or those not configured for Fast Open, at the cost of
654 requiring both directions being enabled for TFO, and TFO never being used
655 by non-daemon-related Exim processes.
657 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
658 endings, at least on the first header line. Try to canonify any that get
659 past that check, despite the cost.
661 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
662 now limited to an arbitrary five deep, while parsing addresses with the
663 strip_excess_angle_brackets option enabled.
665 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
666 instead leave the unprompted TLS handshake in socket buffer for the
667 TLS library to consume.
669 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
671 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
673 JH/16 Drop variables when they go out of scope. Memory management drops a whole
674 region in one operation, for speed, and this leaves assigned pointers
675 dangling. Add checks run only under the testsuite which checks all
676 variables at a store-reset and panics on a dangling pointer; add code
677 explicitly nulling out all the variables discovered. Fixes one known
678 bug: a transport crash, where a dangling pointer for $sending_ip_address
679 originally assigned in a verify callout, is re-used.
681 PP/06 Drop '.' from @INC in various Perl scripts.
683 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
685 PP/08 Reduce a number of compilation warnings under clang; building with
686 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
687 should be warning-free.
689 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
691 HS/01 Fix portability problems introduced by PP/08 for platforms where
692 realloc(NULL) is not equivalent to malloc() [SunOS et al].
694 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
695 chunk. This allows us to accept broken chunked messages. We need a more
696 general solution here.
698 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
699 already-broken messages in the queue.
701 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
703 JH/19 Fix reference counting bug in routing-generated-address tracking.
709 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
710 supports it and a size is available (ie. the sending peer gave us one).
712 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
713 years of being deprecated). The replacements are the ACLs
714 acl_smtp_mime and acl_not_smtp_mime.
716 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
717 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
718 or even an in-clear connection were permitted. Now, if the host lookup
719 was dnssec and dane was requested then the host is only used if the
720 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
721 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
722 if one fails this test.
723 This means that a poorly-configured remote DNS will make it incommunicado;
724 but it protects against a DNS-interception attack on it.
726 JH/04 Bug 1810: make continued-use of an open smtp transport connection
727 non-noisy when a race steals the message being considered.
729 JH/05 If main configuration option tls_certificate is unset, generate a
730 self-signed certificate for inbound TLS connections.
732 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
733 in rewrites and routers.
735 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
736 and logged a warning sing 4.83; now they are a configuration file error.
738 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
739 (lacking @domain). Apply the same qualification processing as RCPT.
741 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
743 JH/10 Support ${sha256:} applied to a string (as well as the previous
746 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
747 a cutthrough deliver is pending, as we always want to make a connection.
748 This also avoids re-routing the message when later placing the cutthrough
749 connection after a verify cache hit.
750 Do not update it with the verify result either.
752 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
753 when routing results in more than one destination address.
755 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
756 signing (which inhibits the cutthrough capability). Previously only
757 the presence of an option was tested; now an expansion evaluating as
758 empty is permissible (obviously it should depend only on data available
759 when the cutthrough connection is made).
761 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
762 the relevant preceding SMTP command did not note the pipelining mode.
764 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
765 Previously they were not counted.
767 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
768 as one having no matching records. Previously we deferred the message
769 that needed the lookup.
771 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
772 distinguished as "(=".
774 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
775 for missing MX records. Previously it only worked for missing A records.
777 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
779 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
780 after the data-go-ahead and data-ack. Patch from Jason Betts.
782 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
783 even for a "none" policy. Patch from Tony Meyer.
785 JH/22 Fix continued use of a connection for further deliveries. If a port was
786 specified by a router, it must also match for the delivery to be
789 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
790 When one of the recipients of a message was unsuitable for the connection
791 (has no matching addresses), we lost track of needing to mark it
792 deferred. As a result mail would be lost.
794 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
796 JH/25 Decoding ACL controls is now done using a binary search; the source code
797 takes up less space and should be simpler to maintain. Merge the ACL
798 condition decode tables also, with similar effect.
800 JH/26 Fix problem with one_time used on a redirect router which returned the
801 parent address unchanged. A retry would see the parent address marked as
802 delivered, so not attempt the (identical) child. As a result mail would
805 JH/27 Fix a possible security hole, wherein a process operating with the Exim
806 UID can gain a root shell. Credit to http://www.halfdog.net/ for
807 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
810 JH/28 Enable {spool,log} filesystem space and inode checks as default.
811 Main config options check_{log,spool}_{inodes,space} are now
812 100 inodes, 10MB unless set otherwise in the configuration.
814 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
815 Previously it only applied to the main-section connection policy
818 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
820 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
821 by me. Added RFC7919 DH primes as an alternative.
823 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
824 are not in the system include path.
826 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
827 GnuTLS, when a session startup failed (eg because the client disconnected)
828 Exim did stdio operations after fclose. This was exposed by a recent
829 change which nulled out the file handle after the fclose.
831 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
832 signed directly by the cert-signing cert, rather than an intermediate
833 OCSP-signing cert. This is the model used by LetsEncrypt.
835 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
837 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
838 an incoming connection.
840 HS/02 Bug 1802: Do not half-close the connection after sending a request
843 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
844 fallback to "prime256v1".
846 JH/34 SECURITY: Use proper copy of DATA command in error message.
847 Could leak key material. Remotely exploitable. CVE-2016-9963.
853 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
854 and 3.4.4 - once the server is enabled to respond to an OCSP request
855 it does even when not requested, resulting in a stapling non-aware
856 client dropping the TLS connection.
858 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
859 support variable-length bit vectors. No functional change.
861 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
862 The I= interface field on outgoing lines is now after the H= remote
863 host field, same as incoming lines. There is a separate
864 outgoing_interface log selector which allows you to disable the
867 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
868 If not running log_selector +smtp_connection the mainlog would be held
869 open indefinitely after a "too many connections" event, including to a
870 deleted file after a log rotate. Leave the per net connection logging
871 leaving it open for efficiency as that will be quickly detected by the
872 check on the next write.
874 HS/01 Bug 1671: Fix post transport crash.
875 Processing the wait-<transport> messages could crash the delivery
876 process if the message IDs didn't exist for some reason. When
877 using 'split_spool_directory=yes' the construction of the spool
878 file name failed already, exposing the same netto behaviour.
880 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
881 mime_regex ACL conditions.
883 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
884 to DSN fail messages (bounces): remote IP, remote greeting, remote response
885 to HELO, local diagnostic string.
887 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
888 log line to debug. Even when configured with a tls authenticator many
889 client connections are expected to not authenticate in this way, so
890 an authenticate fail is not an error.
892 HS/02 Add the Exim version string to the process info. This way exiwhat
893 gives some more detail about the running daemon.
895 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
896 matter for fast-change records such as DNSBLs.
898 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
899 retry record, even if constant. There may be multiple transports with
900 different interface settings and the retry behaviour needs to be kept
903 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
905 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
907 JH/10 Bug 840: fix log_defer_output option of pipe transport
909 JH/11 Bug 830: use same host for all RCPTS of a message, even under
910 hosts_randomize. This matters a lot when combined with mua_wrapper.
912 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
913 ${quote_pgsql:<string>} operator.
915 JH/13 Bug 1708: avoid misaligned access in cached lookup.
917 JH/14 Change header file name for freeradius-client. Relevant if compiling
918 with Radius support; from the Gentoo tree and checked under Fedora.
920 JH/15 Bug 1712: Introduce $prdr_requested flag variable
922 JH/16 Bug 1714: Permit an empty string as expansion result for transport
923 option transport_filter, meaning no filtering.
925 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
927 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
928 defaults to "*" (all hosts). The variable is now available when not built
929 with TLS, default unset, mainly to enable keeping the testsuite sane.
930 If a server certificate is not supplied (via tls_certificate) an error is
931 logged, and clients will find TLS connections fail on startup. Presumably
932 they will retry in-clear.
933 Packagers of Exim are strongly encouraged to create a server certificate
934 at installation time.
936 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
937 with the $config_file variable.
939 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
940 in transport context, after the attempt, and per-recipient. The latter type
941 is per host attempted. The event data is the error message, and the errno
942 information encodes the lookup type (A vs. MX) used for the (first) host,
943 and the trailing two digits of the smtp 4xx response.
945 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
946 to write to mainlog (or rejectlog, paniclog) in the window between file
947 creation and permissions/ownership being changed. Particularly affects
948 installations where exicyclog is run as root, rather than exim user;
949 result is that the running daemon panics and dies.
951 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
953 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
954 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
955 "pri" and "weight". Note that the previous implicit priority given by the
956 list order is no longer honoured.
958 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
961 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
962 by defining SUPPORT_SOCKS.
964 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
965 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
966 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
967 variables are renamed to proxy_{local,external}_{address,port}.
969 JH/27 Move Internationalisation support from Experimental to mainline, enabled
970 for a build by defining SUPPORT_I18N
972 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
973 of the query string, and make ${quote_redis:} do that quoting.
975 JH/29 Move Events support from Experimental to mainline, enabled by default
976 and removable for a build by defining DISABLE_EVENT.
978 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
980 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
981 cached by the daemon.
983 JH/32 Move Redis support from Experimental to mainline, enabled for a build
984 by defining LOOKUP_REDIS. The libhiredis library is required.
986 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
987 keys are given for lookup.
989 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
990 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
991 only supported when built with TLS support. The PolarSSL SHA routines
992 are still used when the TLS library is too old for convenient support.
994 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
995 openssl_options), for security. OpenSSL forces this from version 1.1.0
996 server-side so match that on older versions.
998 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
999 allocation for $value could be released as the expansion processing
1000 concluded, but leaving the global pointer active for it.
1002 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1003 and to use the domains and local_parts ACL conditions.
1005 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1006 incorrectly not doubled on cutthrough transmission, hence seen as a
1007 body-termination at the receiving system - resulting in truncated mails.
1008 Commonly the sender saw a TCP-level error, and retransmitted the message
1009 via the normal store-and-forward channel. This could result in duplicates
1010 received - but deduplicating mailstores were liable to retain only the
1011 initial truncated version.
1013 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1015 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1017 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1018 we're in there, support oversigning also; bug 1309.
1020 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1022 HS/04 Add support for keep_environment and add_environment options.
1024 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1025 either intentional arithmetic overflow during PRNG, or testing config-
1028 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1029 delivery resulted in actual delivery. Cancel cutthrough before DATA
1032 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1033 rejects a recipient: pass the reject to the originator.
1035 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1036 Many were false-positives and ignorable, but it's worth fixing the
1039 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1040 for the new environment-manipulation done at startup. Move the routines
1041 from being local to tls.c to being global via the os.c file.
1043 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1044 an extract embedded as result-arg for a map, the first arg for extract
1045 is unavailable so we cannot tell if this is a numbered or keyed
1046 extraction. Accept either.
1052 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1055 JH/02 The smtp transport option "multi_domain" is now expanded.
1057 JH/03 The smtp transport now requests PRDR by default, if the server offers
1060 JH/04 Certificate name checking on server certificates, when exim is a client,
1061 is now done by default. The transport option tls_verify_cert_hostnames
1062 can be used to disable this per-host. The build option
1063 EXPERIMENTAL_CERTNAMES is withdrawn.
1065 JH/05 The value of the tls_verify_certificates smtp transport and main options
1066 default to the word "system" to access the system default CA bundle.
1067 For GnuTLS, only version 3.0.20 or later.
1069 JH/06 Verification of the server certificate for a TLS connection is now tried
1070 (but not required) by default. The verification status is now logged by
1071 default, for both outbound TLS and client-certificate supplying inbound
1074 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1077 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1078 Status Notification (bounce) messages are now MIME format per RFC 3464.
1079 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1080 under the control of the dsn_advertise_hosts option, and routers may
1081 have a dsn_lasthop option.
1083 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1084 default, modifiable by a malware= option. The list separator for
1085 the options can now be changed in the usual way. Bug 68.
1087 JH/10 The smtp_receive_timeout main option is now expanded before use.
1089 JH/11 The incoming_interface log option now also enables logging of the
1090 local interface on delivery outgoing connections.
1092 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1093 if the interface and destination host and port all match.
1095 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1098 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1099 Patch from Andrew Lewis.
1101 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1102 now supports optional time-restrictions, weighting, and priority
1103 modifiers per server. Patch originally by <rommer@active.by>.
1105 JH/16 The spamd_address main option now supports a mixed list of local
1106 and remote servers. Remote servers can be IPv6 addresses, and
1107 specify a port-range.
1109 JH/17 Bug 68: The spamd_address main option now supports an optional
1110 timeout value per server.
1112 JH/18 Bug 1581: Router and transport options headers_add/remove can
1113 now have the list separator specified.
1115 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1118 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1121 JH/21 Support for the A6 type of dns record is withdrawn.
1123 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1124 rather than the verbs used.
1126 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1127 from 255 to 1024 chars.
1129 JH/24 Verification callouts now attempt to use TLS by default.
1131 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1132 are generic router options now. The defaults didn't change.
1134 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1135 Original patch from Alexander Shikoff, worked over by JH.
1137 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1138 files if ZCAT_COMMAND is not executable.
1140 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1142 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1144 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1145 Normally benign, it bites when the pair was led to by a CNAME;
1146 modern usage is to not canonicalize the domain to a CNAME target
1147 (and we were inconsistent anyway for A-only vs AAAA+A).
1149 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1151 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1152 when evaluating $sender_host_dnssec.
1154 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1155 $sender_helo_dnssec variable.
1157 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1159 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1161 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1163 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1164 documented as working, but never had. Support all but $spam_report.
1166 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1167 added for tls authenticator.
1169 HS/03 Add perl_taintmode main config option
1175 TL/01 When running the test suite, the README says that variables such as
1176 no_msglog_check are global and can be placed anywhere in a specific
1177 test's script, however it was observed that placement needed to be near
1178 the beginning for it to behave that way. Changed the runtest perl
1179 script to read through the entire script once to detect and set these
1180 variables, reset to the beginning of the script, and then run through
1181 the script parsing/test process like normal.
1183 TL/02 The BSD's have an arc4random API. One of the functions to induce
1184 adding randomness was arc4random_stir(), but it has been removed in
1185 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1186 function when detected.
1188 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1189 cause callback expansion.
1191 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1192 syntax errors in an expansion can be treated as a string instead of
1193 logging or causing an error, due to the internal use of bool_lax
1194 instead of bool when processing it.
1196 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1197 server certificates when making smtp deliveries.
1199 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1201 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1203 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1205 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1206 Merged patch from Sebastian Wiedenroth.
1208 JH/05 Fix results-pipe from transport process. Several recipients, combined
1209 with certificate use, exposed issues where response data items split
1210 over buffer boundaries were not parsed properly. This eventually
1211 resulted in duplicates being sent. This issue only became common enough
1212 to notice due to the introduction of connection certificate information,
1213 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1215 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1216 size buffer was used, resulting in syntax errors when an expansion
1219 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1220 version 3.3.6 or later.
1222 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1223 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1224 both become "event_action", the variables become $event_name, $event_data
1225 and $event_defer_errno. There is a new variable $verify_mode, usable in
1226 routers, transports and related events. The tls:cert event is now also
1227 raised for inbound connections, if the main configuration event_action
1230 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1231 early OCSP support, but no stapling (appears to be less than 1.0.0).
1233 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1234 server certificate names available under the smtp transport option
1235 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1238 JH/10 Time-related extraction expansions from certificates now use the main
1239 option "timezone" setting for output formatting, and are consistent
1240 between OpenSSL and GnuTLS compilations. Bug 1541.
1242 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1243 encoded parameter in the incoming message. Bug 1558.
1245 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1246 include certificate info, eximon was claiming there were spoolfile
1249 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1251 JH/14 Log delivery-related information more consistently, using the sequence
1252 "H=<name> [<ip>]" wherever possible.
1254 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1255 are problematic for Debian distribution, omit them from the release
1258 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1260 JH/16 Fix string representation of time values on 64bit time_t architectures.
1263 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1264 output list separator was used.
1269 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1270 checkers that were complaining about end of non-void function with no
1273 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1274 This was a regression introduced in 4.83 by another bugfix.
1276 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1278 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1279 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1285 TF/01 Correctly close the server side of TLS when forking for delivery.
1287 When a message was received over SMTP with TLS, Exim failed to clear up
1288 the incoming connection properly after forking off the child process to
1289 deliver the message. In some situations the subsequent outgoing
1290 delivery connection happened to have the same fd number as the incoming
1291 connection previously had. Exim would try to use TLS and fail, logging
1292 a "Bad file descriptor" error.
1294 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1295 utilities have not been installed.
1297 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1298 temporary space as the ACL may create new global variables.
1300 TL/01 LDAP support uses per connection or global context settings, depending
1301 upon the detected version of the libraries at build time.
1303 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1304 to extract and use the src ip:port in logging and expansions as if it
1305 were a direct connection from the outside internet. PPv2 support was
1306 updated based on HAProxy spec change in May 2014.
1308 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1310 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1311 Properly escape header and check for NULL return.
1313 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1316 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1318 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1319 characters in header names, implemented as a verify condition.
1320 Contributed by Michael Fischer v. Mollard.
1322 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1323 results permerror and temperror. Previous values are deprecated but
1324 still accepted. In a future release, err_perm and err_temp will be
1325 completely removed, which will be a backward incompatibility if the
1326 ACL tests for either of these two old results. Patch contributed by
1327 user bes-internal on the mailing list.
1329 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1331 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1332 selectors, in both main and reject logs.
1334 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1337 JH/07 Add malware type "sock" for talking to simple daemon.
1339 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1341 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1342 routers/transports under cutthrough routing.
1344 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1345 numbers. Touch up "bool" conditional to keep the same definition.
1347 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1349 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1351 JH/12 Expand items in router/transport headers_add or headers_remove lists
1352 individually rather than the list as a whole. Bug 1452.
1354 Required for reasonable handling of multiple headers_ options when
1355 they may be empty; requires that headers_remove items with embedded
1356 colons must have them doubled (or the list-separator changed).
1358 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1359 view the policy declared in the DMARC record. Currently, $dmarc_status
1360 is a combined value of both the record presence and the result of the
1363 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1365 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1366 dnslookup router and the smtp transport (applying to the forward
1369 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1370 of ldap servers used for a specific lookup. Patch provided by Heiko
1373 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1374 New variable $lookup_dnssec_authenticated for observability.
1376 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1377 Patch submitted by Lars Timman.
1379 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1381 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1382 Requires trusted mode and valid format message id, aborts otherwise.
1383 Patch contributed by Heiko Schlichting.
1385 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1386 certextract with support for various fields. Bug 1358.
1388 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1389 is requested by default, modifiable by smtp transport option
1392 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1393 operate on certificate variables to give certificate fingerprints
1394 Also new ${sha256:cert_variable}.
1396 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1398 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1399 Christian Aistleitner.
1401 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1403 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1404 file. Patch from Wolfgang Breyha.
1406 JH/25 Expand the coverage of the delivery $host and $host_address to
1407 client authenticators run in verify callout. Bug 1476.
1409 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1410 align with daemon_smtp_ports. Bug 72.
1412 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1413 support and error reporting did not work properly.
1415 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1416 and is readable. Patch from Andrew Colin Kissa.
1418 TL/14 Enhance documentation of ${run expansion and how it parses the
1419 commandline after expansion, particularly in the case when an
1420 unquoted variable expansion results in an empty value.
1422 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1424 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1425 by renaming away from it. Addresses GH issue 15, reported by
1428 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1430 TL/15 SECURITY: prevent double expansion in math comparison functions
1431 (can expand unsanitized data). Not remotely exploitable.
1438 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1440 PP/02 Make -n do something, by making it not do something.
1441 When combined with -bP, the name of an option is not output.
1443 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1446 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1447 $sender_host_name and config options to manage this, and basic check
1450 PP/05 DSCP support for outbound connections and control modifier for inbound.
1452 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1453 (Only plugin which currently uses this is kerberos4, which nobody should
1454 be using, but we should make it available and other future plugins might
1455 conceivably use it, even though it would break NAT; stuff *should* be
1456 using channel bindings instead).
1458 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1459 name; added for Sendmail compatibility; requires admin caller.
1460 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1461 just ignore it); requires trusted caller.
1462 Also parse but ignore: -Ac -Am -X<logfile>
1465 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1467 TL/02 Add +smtp_confirmation as a default logging option.
1469 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1470 Patch by Magnus Holmgren from 2007-02-20.
1472 TL/04 Bugzilla 1281 - Spec typo.
1473 Bugzilla 1283 - Spec typo.
1474 Bugzilla 1290 - Spec grammar fixes.
1476 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1478 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1480 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1481 mailing list by by Dmitry Isaikin.
1483 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1485 JH/02 Support "G" suffix to numbers in ${if comparisons.
1487 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1489 NM/01 Bugzilla 1197 - Spec typo
1490 Bugzilla 1196 - Spec examples corrections
1492 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1494 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1495 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1498 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1499 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1501 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1502 "acl {{name}{arg}...}", and optional args on acl condition
1505 JH/05 Permit multiple router/transport headers_add/remove lines.
1507 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1509 JH/07 Avoid using a waiting database for a single-message-only transport.
1510 Performance patch from Paul Fisher. Bugzilla 1262.
1512 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1515 JH/09 Add $headers_added variable, with content from use of ACL modifier
1516 add_header (but not yet added to the message). Bugzilla 199.
1518 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1519 Pulled from Bugzilla 817 by Wolfgang Breyha.
1521 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1523 (nb: this is the same fix as in Exim 4.80.1)
1525 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1528 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1531 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1533 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1534 advertise SMTP AUTH mechanism to us, instead of a generic
1535 protocol violation error. Also, make Exim more robust to bad
1536 data from the Dovecot auth socket.
1538 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1540 When a queue runner is handling a message, Exim first routes the
1541 recipient addresses, during which it prunes them based on the retry
1542 hints database. After that it attempts to deliver the message to
1543 any remaining recipients. It then updates the hints database using
1546 So if a recipient address works intermittently, it can get repeatedly
1547 deferred at routing time. The retry hints record remains fresh so the
1548 address never reaches the final cutoff time.
1550 This is a fairly common occurrence when a user is bumping up against
1551 their storage quota. Exim had some logic in its local delivery code
1552 to deal with this. However it did not apply to per-recipient defers
1553 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1555 This change adds a proper retry rule check during routing so that the
1556 final cutoff time is checked against the message's age. We only do
1557 this check if there is an address retry record and there is not a
1558 domain retry record; this implies that previous attempts to handle
1559 the address had the retry_use_local_parts option turned on. We use
1560 this as an approximation for the destination being like a local
1561 delivery, as in LMTP.
1563 I suspect this new check makes the old local delivery cutoff check
1564 redundant, but I have not verified this so I left the code in place.
1566 TF/02 Correct gecos expansion when From: is a prefix of the username.
1568 Test 0254 submits a message to Exim with the header
1572 When I ran the test suite under the user fanf2, Exim expanded
1573 the header to contain my full name, whereas it should have added
1574 a Resent-Sender: header. It erroneously treats any prefix of the
1575 username as equal to the username.
1577 This change corrects that bug.
1579 GF/01 DCC debug and logging tidyup
1580 Error conditions log to paniclog rather than rejectlog.
1581 Debug lines prefixed by "DCC: " to remove any ambiguity.
1583 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1585 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1586 Bug spotted by Jeremy Harris; was flawed since initial commit.
1587 Would have resulted in OCSP responses post-SNI triggering an Exim
1588 NULL dereference and crash.
1590 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1592 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1593 Bug detection, analysis and fix by Samuel Thibault.
1594 Bugzilla 1331, Debian bug #698092.
1596 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1598 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1599 Server implementation by Todd Lyons, client by JH.
1600 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1601 config variable "prdr_enable" controls whether the server
1602 advertises the facility. If the client requests PRDR a new
1603 acl_data_smtp_prdr ACL is called once for each recipient, after
1604 the body content is received and before the acl_smtp_data ACL.
1605 The client is controlled by both of: a hosts_try_prdr option
1606 on the smtp transport, and the server advertisement.
1607 Default client logging of deliveries and rejections involving
1608 PRDR are flagged with the string "PRDR".
1610 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1611 fclose(). Diagnosis by Todd Lyons.
1613 PP/17 Update configure.default to handle IPv6 localhost better.
1614 Patch by Alain Williams (plus minor tweaks).
1617 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1618 This is now consistent with GnuTLS, and is now documented: the
1619 previous undocumented portable approach to treating the option as
1620 unset was to force an expansion failure. That still works, and
1621 an empty string is now equivalent.
1623 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1624 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1625 not performing validation itself.
1627 PP/20 Added force_command boolean option to pipe transport.
1628 Patch from Nick Koston, of cPanel Inc.
1630 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1633 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1635 PP/21 Fix eximon continuous updating with timestamped log-files.
1636 Broken in a format-string cleanup in 4.80, missed when I repaired the
1637 other false fix of the same issue.
1638 Report and fix from Heiko Schlichting.
1641 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1642 Report from Prashanth Katuri.
1644 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1645 It's SecureTransport, so affects any MacOS clients which use the
1646 system-integrated TLS libraries, including email clients.
1648 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1649 using a MIME ACL for non-SMTP local injection.
1650 Report and assistance in diagnosis by Warren Baker.
1652 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1654 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1656 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1657 last id that failed so it may be referenced in subsequent ACL's.
1659 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1662 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1663 ldap library initialization, allowing self-signed CA's to be
1664 used. Also properly sets require_cert option later in code by
1665 using NULL (global ldap config) instead of ldap handle (per
1666 session). Bug diagnosis and testing by alxgomz.
1668 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1669 the src/util/ subdirectory.
1671 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1672 renamed to Transport Post Delivery Action by Jeremy Harris, as
1675 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1676 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1677 redis_servers = needs to be configured which will be used by the redis
1678 lookup. Patch from Warren Baker, of The Packet Hub.
1680 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1682 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1683 hostname or reverse DNS when processing a host list. Used suggestions
1684 from multiple comments on this bug.
1686 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1688 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1689 Missed a few lines, added it to make the runtest require no keyboard
1692 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1693 contains upper case chars. Make router use caseful_local_part.
1695 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1696 support when GnuTLS has been built with p11-kit.
1702 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1704 This, or similar/improved, will also be change PP/11 of 4.82.
1710 PP/01 Handle short writes when writing local log-files.
1711 In practice, only affects FreeBSD (8 onwards).
1712 Bugzilla 1053, with thanks to Dmitry Isaikin.
1714 NM/01 Bugzilla 949 - Documentation tweak
1716 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1719 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1721 PP/02 Implemented gsasl authenticator.
1723 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1725 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1726 `pkg-config foo` for cflags/libs.
1728 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1729 with rest of GSASL and with heimdal_gssapi.
1731 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1732 `pkg-config foo` for cflags/libs for the TLS implementation.
1734 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1735 properties get this fed in as external SSF. A number of robustness
1736 and debugging improvements to the cyrus_sasl authenticator.
1738 PP/08 cyrus_sasl server now expands the server_realm option.
1740 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1741 Patch by Jeremy Harris.
1743 PP/10 Added dbmjz lookup type.
1745 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1747 PP/12 MAIL args handles TAB as well as SP, for better interop with
1748 non-compliant senders.
1749 Analysis and variant patch by Todd Lyons.
1751 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1752 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1753 Patch from Dirk Mueller <dmueller@suse.com>
1755 PP/13 tls_peerdn now print-escaped for spool files.
1756 Observed some $tls_peerdn in wild which contained \n, which resulted
1757 in spool file corruption.
1759 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1760 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1761 or write after TLS renegotiation, which otherwise led to messages
1764 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1765 as a tracking header (ie: a signed header comes before the signature).
1766 Patch from Wolfgang Breyha.
1768 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1769 comma-sep list; embedded commas doubled.
1771 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1773 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1775 Report and patch from Dmitry Banschikov.
1777 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1778 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1779 failures. We appear to now support TLS1.1+ with Exim.
1781 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1782 lets Exim select keys and certificates based upon TLS SNI from client.
1783 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1784 before an outbound SMTP session. New log_selector, +tls_sni.
1786 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1787 NULL dereference. Report and patch from Alun Jones.
1789 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1790 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1791 Not seeing resolver debug output on NetBSD, but suspect this is a
1792 resolver implementation change.
1794 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1795 Left warnings. Added "eximon gdb" invocation mode.
1797 PP/21 Defaulting "accept_8bitmime" to true, not false.
1799 PP/22 Added -bw for inetd wait mode support.
1801 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1802 locate the relevant includes and libraries. Made this the default.
1804 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1805 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1807 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1808 This may cause build issues on older platforms.
1810 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1811 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1812 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1813 Added SNI support via GnuTLS too.
1814 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1816 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1818 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1819 Applied second patch from Janne, implementing suggestion to default
1820 multiple-strings-in-record handling to match SPF spec.
1822 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1824 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1825 read-only, out of scope).
1826 Patch from Wolfgang Breyha, report from Stuart Northfield.
1828 PP/29 Fix three issues highlighted by clang analyser static analysis.
1829 Only crash-plausible issue would require the Cambridge-specific
1830 iplookup router and a misconfiguration.
1831 Report from Marcin Mirosław.
1833 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1835 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1836 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1837 As part of this, removing so much warning spew let me fix some minor
1838 real issues in debug logging.
1840 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1841 assignment on my part. Fixed.
1843 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1844 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1845 Janne Snabb (who went above and beyond: thank you).
1847 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1848 string otherwise requires a connection and a bunch more work and it's
1849 relatively easy to get wrong. Should also expose TLS library linkage
1852 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1853 64-bit ${eval} (JH/03).
1855 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1856 GNU libc to support some of the 64-bit stuff, should not lead to
1857 conflicts. Defined before os.h is pulled in, so if a given platform
1858 needs to override this, it can.
1860 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1861 protection layer was required, which is not implemented.
1862 Bugzilla 1254, patch from Wolfgang Breyha.
1864 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1865 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1866 tls_dhparam take prime identifiers. Also unbreak combination of
1867 OpenSSL+DH_params+TLSSNI.
1869 PP/39 Disable SSLv2 by default in OpenSSL support.
1875 PP/01 Solaris build fix for Oracle's LDAP libraries.
1876 Bugzilla 1109, patch from Stephen Usher.
1878 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1880 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1883 TF/02 Fix a couple more cases where we did not log the error message
1884 when unlink() failed. See also change 4.74-TF/03.
1886 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1887 lock up or crash if it happened to be inside a call to libc when it
1888 got a SIGUSR1 from exiwhat.
1890 The SIGUSR1 handler appends the current process status to the process
1891 log which is later printed by exiwhat. It used to use the general
1892 purpose logging code to do this, but several functions it calls are
1893 not safe for signals.
1895 The new output code in the SIGUSR1 handler is specific to the process
1896 log, and simple enough that it's easy to inspect for signal safety.
1897 Removing some special cases also simplifies the general logging code.
1898 Removing the spurious timestamps from the process log simplifies
1901 TF/04 Improved ratelimit ACL condition.
1903 The /noupdate option has been deprecated in favour of /readonly which
1904 has clearer semantics. The /leaky, /strict, and /readonly update modes
1905 are mutually exclusive. The update mode is no longer included in the
1906 database key; it just determines when the database is updated. (This
1907 means that when you upgrade Exim will forget old rate measurements.)
1909 Exim now checks that the per_* options are used with an update mode that
1910 makes sense for the current ACL. For example, when Exim is processing a
1911 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1912 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1913 must specify per_mail/readonly. If you omit the update mode it defaults to
1914 /leaky where that makes sense (as before) or /readonly where required.
1916 The /noupdate option is now undocumented but still supported for
1917 backwards compatibility. It is equivalent to /readonly except that in
1918 ACLs where /readonly is required you may specify /leaky/noupdate or
1919 /strict/noupdate which are treated the same as /readonly.
1921 A useful new feature is the /count= option. This is a generalization
1922 of the per_byte option, so that you can measure the throughput of other
1923 aggregate values. For example, the per_byte option is now equivalent
1924 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1926 The per_rcpt option has been generalized using the /count= mechanism
1927 (though it's more complicated than the per_byte equivalence). When it is
1928 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1929 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1930 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1931 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1932 Note that using per_rcpt with a non-readonly update mode in more than
1933 one ACL will cause the recipients to be double-counted. (The per_mail
1934 and per_byte options don't have this problem.)
1936 The handling of very low rates has changed slightly. If the computed rate
1937 is less than the event's count (usually one) then this event is the first
1938 after a long gap. In this case the rate is set to the same as this event's
1939 count, so that the first message of a spam run is counted properly.
1941 The major new feature is a mechanism for counting the rate of unique
1942 events. The new per_addr option counts the number of different
1943 recipients that someone has sent messages to in the last time period. It
1944 behaves like per_rcpt if all the recipient addresses are different, but
1945 duplicate recipient addresses do not increase the measured rate. Like
1946 the /count= option this is a general mechanism, so the per_addr option
1947 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1948 example, measure the rate that a client uses different sender addresses
1949 with the options per_mail/unique=$sender_address. There are further
1950 details in the main documentation.
1952 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1954 TF/06 Removed a few PCRE remnants.
1956 TF/07 Automatically extract Exim's version number from tags in the git
1957 repository when doing development or release builds.
1959 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1960 Bugzilla 879. Patch from Paul Fisher.
1962 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1963 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1966 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1968 PP/05 Variable $av_failed, true if the AV scanner deferred.
1969 Bugzilla 1078. Patch from John Horne.
1971 PP/06 Stop make process more reliably on build failure.
1972 Bugzilla 1087. Patch from Heiko Schlittermann.
1974 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1975 Bugzilla 1089. Patch from Heiko Schlittermann.
1977 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1978 Bugzilla 1131. Patch from Holger Weiß.
1980 PP/09 Handle IPv6 addresses with SPF.
1981 Bugzilla 860. Patch from Wolfgang Breyha.
1983 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1985 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1988 PP/11 match_* no longer expand right-hand-side by default.
1989 New compile-time build option, EXPAND_LISTMATCH_RHS.
1990 New expansion conditions, "inlist", "inlisti".
1992 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1994 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1996 PP/14 fix log_write() format string regression from TF/03.
1997 Bugzilla 1152. Patch from Dmitry Isaikin.
2003 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2005 PP/02 Harmonised TLS library version reporting; only show if debugging.
2006 Layout now matches that introduced for other libraries in 4.74 PP/03.
2008 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2010 PP/04 New "dns_use_edns0" global option.
2012 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2015 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2016 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2018 TK/01 Updated PolarSSL code to 0.14.2.
2019 Bugzilla 1097. Patch from Andreas Metzler.
2021 PP/07 Catch divide-by-zero in ${eval:...}.
2022 Fixes bugzilla 1102.
2024 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2027 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2028 format-string attack -- SECURITY: remote arbitrary code execution.
2030 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2031 time unintentionally subject to list matching rules, letting the header
2032 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2033 arbitrary string expansion). This allowed for information disclosure.
2035 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2036 INT_MIN/-1 -- value coerced to INT_MAX.
2042 NM/01 Workaround for PCRE version dependency in version reporting
2045 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2046 This fixes portability to compilers other than gcc, notably
2047 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2049 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2050 makefiles for portability to HP-UX and POSIX correctness.
2052 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2053 Also via indented variable definition in the Makefile.
2054 (Debugging by Oliver Heesakkers).
2056 PP/02 Restore caching of spamd results with expanded spamd_address.
2057 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2059 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2060 Improves build reliability. Fix from: Frank Elsner
2062 NM/02 Fix wide character breakage in the rfc2047 coding
2063 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2065 NM/03 Allow underscore in dnslist lookups
2066 Fixes bug 1026. Patch from Graeme Fowler
2068 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2069 Code patches from Adam Ciarcinski of NetBSD.
2071 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2074 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2075 is logged, to avoid truncation. Patch from John Horne.
2077 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2078 Patch from Jakob Hirsch.
2080 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2081 SQL string expansion failure details.
2082 Patch from Andrey Oktyabrski.
2084 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2085 Patch from Simon Arlott.
2087 PP/09 New lookups functionality failed to compile on old gcc which rejects
2088 extern declarations in function scope.
2089 Patch from Oliver Fleischmann
2091 PP/10 Use sig_atomic_t for flags set from signal handlers.
2092 Check getgroups() return and improve debugging.
2093 Fixed developed for diagnosis in bug 927 (which turned out to be
2096 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2097 Patch from Mark Zealey.
2099 PP/12 Bugzilla 1056: Improved spamd server selection.
2100 Patch from Mark Zealey.
2102 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2103 Based on patch from Heiko Schlittermann.
2105 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2106 Patch from Uwe Doering, sign-off by Michael Haardt.
2108 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2109 variable declaration deep within a block. Bug and patch from
2112 PP/15 lookups-Makefile IRIX compatibility coercion.
2114 PP/16 Make DISABLE_DKIM build knob functional.
2116 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2117 Patch by Simon Arlott
2119 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2120 variable argument macros. Our copy now differs from upstream.
2126 TF/01 Failure to get a lock on a hints database can have serious
2127 consequences so log it to the panic log.
2129 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2130 controlled using the smtp_confirmation log selector.
2132 TF/03 Include the error message when we fail to unlink a spool file.
2134 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2135 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2136 for maintaining out-of-tree patches for some time.
2138 PP/01 Bugzilla 139: Documentation and portability issues.
2139 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2140 Handle per-OS dynamic-module compilation flags.
2142 PP/02 Let /dev/null have normal permissions.
2143 The 4.73 fixes were a little too stringent and complained about the
2144 permissions on /dev/null. Exempt it from some checks.
2145 Reported by Andreas M. Kirchwitz.
2147 PP/03 Report version information for many libraries, including
2148 Exim version information for dynamically loaded libraries. Created
2149 version.h, now support a version extension string for distributors
2150 who patch heavily. Dynamic module ABI change.
2152 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2153 privilege escalation vulnerability whereby the Exim run-time user
2154 can cause root to append content of the attacker's choosing to
2157 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2160 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2161 If dropping privileges for untrusted macros, we disabled normal logging
2162 on the basis that it would fail; for the Exim run-time user, this is not
2163 the case, and it resulted in successful deliveries going unlogged.
2164 Fixed. Reported by Andreas Metzler.
2170 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2171 only prepend for the Resent-* case. Fixes regression introduced in
2172 Exim 4.70 by NM/22 for Bugzilla 607.
2174 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2175 increasing numbers of administrators be bitten by this.
2177 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2179 PP/03 Bugzilla 994: added openssl_options main configuration option.
2181 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2183 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2185 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2187 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2188 without a peer certificate, leading to a segfault because of an
2189 assumption that peers always have certificates. Be a little more
2190 paranoid. Problem reported by Martin Tscholak.
2192 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2193 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2194 NB: ClamAV planning to remove STREAM in "middle of 2010".
2195 CL also introduces -bmalware, various -d+acl logging additions and
2196 more caution in buffer sizes.
2198 PP/09 Implemented reverse_ip expansion operator.
2200 PP/10 Bugzilla 937: provide a "debug" ACL control.
2202 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2204 PP/12 Bugzilla 973: Implement --version.
2206 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2208 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2210 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2212 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2213 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2214 ignore trailing whitespace.
2216 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2218 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2221 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2222 Notification from Dr Andrew Aitchison.
2224 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2225 ExtendedDetectionInfo response format.
2226 Notification from John Horne.
2228 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2231 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2232 XSL and documented dependency on system catalogs, with examples of how
2235 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2238 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2239 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2240 configuration file which is writeable by the Exim user or group.
2242 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2243 of configuration files to cover files specified with the -C option if
2244 they are going to be used with root privileges, not just the default
2247 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2248 option (effectively making it always true).
2250 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2251 files to be used while preserving root privileges.
2253 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2254 that rogue child processes cannot use them.
2256 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2257 run-time user, instead of root.
2259 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2260 Exim run-time user without dropping privileges.
2262 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2263 result string, instead of calling string_vformat() twice with the same
2266 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2267 for other users. Others should always drop root privileges if they use
2268 -C on the command line, even for a whitelisted configure file.
2270 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2272 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2278 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2279 $data_path, and $header_path variables; fixed documentation bugs and
2282 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2283 exipick to access non-standard spools, including the "frozen" queue
2286 NM/01 Bugzilla 965: Support mysql stored procedures.
2287 Patch from Alain Williams
2289 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2291 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2292 Patch from Andreas Metzler
2294 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2295 Patch from Kirill Miazine
2297 NM/05 Bugzilla 671: Added umask to procmail example.
2299 JJ/03 installed exipick 20100323.0, fixing doc bug
2301 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2302 directory. Notification and patch from Dan Rosenberg.
2304 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2306 TK/02 Improve log output when DKIM signing operation fails.
2308 MH/01 Treat the transport option dkim_domain as a colon separated
2309 list, not as a single string, and sign the message with each element,
2310 omitting multiple occurences of the same signer.
2312 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2313 Bugzilla 985, 986. Patch by Simon Arlott
2315 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2316 Patch by Simon Arlott
2318 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2319 MBX locking. Notification from Dan Rosenberg.
2325 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2327 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2329 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2331 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2333 NM/04 Bugzilla 915: Flag broken perl installation during build.
2339 TK/01 Added patch by Johannes Berg that expands the main option
2340 "spamd_address" if it starts with a dollar sign.
2342 TK/02 Write list of recipients to X-Envelope-Sender header when building
2343 the mbox-format spool file for content scanning (suggested by Jakob
2346 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2347 (http://www.dcc-servers.net/) support via dccifd. Activated by
2348 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2350 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2351 by Mark Daniel Reidel <mr@df.eu>.
2353 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2354 When building exim an external PCRE library is now needed -
2355 PCRE is a system library on the majority of modern systems.
2356 See entry on PCRE_LIBS in EDITME file.
2358 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2359 conversation. Added nologin parameter to request.
2360 Patch contributed by Kirill Miazine.
2362 TF/01 Do not log submission mode rewrites if they do not change the address.
2364 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2366 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2367 log files in place. Contributed by Roberto Lima.
2369 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2371 TF/03 Bugzilla 615: When checking the local_parts router precondition
2372 after a local_part_suffix or local_part_prefix option, Exim now
2373 does not use the address's named list lookup cache, since this
2374 contains cached lookups for the whole local part.
2376 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2377 Robert Millan. Documentation is in experimental-spec.txt.
2379 TF/04 Bugzilla 668: Fix parallel build (make -j).
2381 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2383 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2384 Patch provided by Jan Srzednicki.
2386 TF/05 Leading white space used to be stripped from $spam_report which
2387 wrecked the formatting. Now it is preserved.
2389 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2390 that they are available at delivery time.
2392 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2394 TF/08 TLS error reporting now respects the incoming_interface and
2395 incoming_port log selectors.
2397 TF/09 Produce a more useful error message if an SMTP transport's hosts
2398 setting expands to an empty string.
2400 NM/06 Bugzilla 744: EXPN did not work under TLS.
2401 Patch provided by Phil Pennock.
2403 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2404 Patch provided by Richard Godbee.
2406 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2407 acl_smtp_notquit, added index entry.
2409 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2410 Patch provided by Eugene Bujak.
2412 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2413 accept(). Patch provided by Maxim Dounin.
2415 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2416 Patch provided by Phil Pennock.
2418 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2420 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2421 Patch provided by Brad "anomie" Jorsch.
2423 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2424 Patch provided by Dean Brooks.
2426 TK/05 Add native DKIM support (does not depend on external libraries).
2428 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2429 Patch provided by Graeme Fowler.
2431 NM/16 Bugzilla 851: Documentation example syntax fix.
2433 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2435 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2438 NM/19 Bugzilla 745: TLS version reporting.
2439 Patch provided by Phil Pennock.
2441 NM/20 Bugzilla 167: bool: condition support.
2442 Patch provided by Phil Pennock.
2444 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2445 clients. Patch provided by Phil Pennock.
2447 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2448 Patch provided by Brad "anomie" Jorsch.
2450 NM/23 Bugzilla 687: Fix misparses in eximstats.
2451 Patch provided by Heiko Schlittermann.
2453 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2454 Patch provided by Heiko Schlittermann.
2456 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2457 plus update to original patch.
2459 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2461 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2462 Patch provided by David Brownlee.
2464 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2466 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2468 NM/30 Bugzilla 888: TLS documentation bugfixes.
2470 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2472 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2473 Unlike the original bugzilla I have changed all shell scripts in src tree.
2475 NM/33 Bugzilla 898: Transport filter timeout fix.
2476 Patch by Todd Rinaldo.
2478 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2479 Patch by Serge Demonchaux.
2481 NM/35 Bugzilla 39: Base64 decode bug fixes.
2482 Patch by Jakob Hirsch.
2484 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2486 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2488 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2490 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2496 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2497 ALT-N's libdkim that I have put here:
2498 http://duncanthrax.net/exim-experimental/
2500 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2501 were called 'true' and it seems that C99 defines that as a reserved
2502 keyword to be used with 'bool' variable types. That means you could
2503 not include C99-style headers which use bools without triggering
2504 build errors in sieve.c.
2506 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2507 as mailq or other aliases. Changed the --help handling significantly
2508 to do whats expected. exim_usage() emits usage/help information.
2510 SC/01 Added the -bylocaldomain option to eximstats.
2512 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2514 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2516 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2522 PH/01 Another patch from the Sieve maintainer.
2524 PH/02 When an IPv6 address is converted to a string for single-key lookup
2525 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2526 dots are used instead of colons so that keys in lsearch files need not
2527 contain colons. This was done some time before quoting was made available
2528 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2529 (notated using the quote facility) so as to distinguish them from IPv4
2530 keys. This meant that lookups for IP addresses in host lists did not work
2531 for iplsearch lookups.
2533 This has been fixed by arranging for IPv6 addresses to be expressed with
2534 colons if the lookup type is iplsearch. This is not incompatible, because
2535 previously such lookups could never work.
2537 The situation is now rather anomalous, since one *can* have colons in
2538 ordinary lsearch keys. However, making the change in all cases is
2539 incompatible and would probably break a number of configurations.
2541 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2544 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2545 conversion specification without a maximum field width, thereby enabling
2546 a rogue spamd server to cause a buffer overflow. While nobody in their
2547 right mind would setup Exim to query an untrusted spamd server, an
2548 attacker that gains access to a server running spamd could potentially
2549 exploit this vulnerability to run arbitrary code as the Exim user.
2551 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2552 $primary_hostname instead of what libspf2 thinks the hosts name is.
2554 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2555 a directory entry by the name of the lookup key. Previously, if a
2556 symlink pointed to a non-existing file or a file in a directory that
2557 Exim lacked permissions to read, a lookup for a key matching that
2558 symlink would fail. Now it is enough that a matching directory entry
2559 exists, symlink or not. (Bugzilla 503.)
2561 PH/03 The body_linecount and body_zerocount variables are now exported in the
2564 PH/04 Added the $dnslist_matched variable.
2566 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2567 This means they are set thereafter only if the connection becomes
2570 PH/06 Added the client_condition to authenticators so that some can be skipped
2571 by clients under certain conditions.
2573 PH/07 The error message for a badly-placed control=no_multiline_responses left
2574 "_responses" off the end of the name.
2576 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2578 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2579 (without spaces) instead of just copying the configuration text.
2581 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2583 PH/11 Added $max_received_linelength.
2585 PH/12 Added +ignore_defer and +include_defer to host lists.
2587 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2588 way in which PCRE > 7.0 is built.
2590 PH/14 Implemented queue_only_load_latch.
2592 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2593 MAIL command. The effect was to mangle the value on 64-bit systems.
2595 PH/16 Another patch from the Sieve maintainer.
2597 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2599 PH/18 If a system quota error occurred while trying to create the file for
2600 a maildir delivery, the message "Mailbox is full" was not appended to the
2601 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2602 only to a quota excession during the actual writing of the file.
2604 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2605 characters?) which causes problems in log lines. The DN values are now
2606 passed through string_printing() before being added to log lines.
2608 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2609 and InterBase are left for another time.)
2611 PH/21 Added message_body_newlines option.
2613 PH/22 Guard against possible overflow in moan_check_errorcopy().
2615 PH/23 POSIX allows open() to be a macro; guard against that.
2617 PH/24 If the recipient of an error message contained an @ in the local part
2618 (suitably quoted, of course), incorrect values were put in $domain and
2619 $local_part during the evaluation of errors_copy.
2625 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2626 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2629 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2630 issue a MAIL command.
2632 PH/02 In an ACL statement such as
2634 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2636 if a client was not listed at all, or was listed with a value other than
2637 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2638 the condition was not true (as it should be), so access was not denied.
2639 The bug was that the ! inversion was incorrectly passed on to the second
2640 item. This has been fixed.
2642 PH/03 Added additional dnslists conditions == and =& which are different from
2643 = and & when the dns lookup returns more than one IP address.
2645 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2646 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2648 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2649 FSYNC, which compiles an option called disable_fsync that allows for
2650 bypassing fsync(). The documentation is heavily laced with warnings.
2652 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2654 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2655 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2656 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2657 including adding "make clean"; (3) Added -fPIC when compiling the test
2658 dynamically loaded module, to get rid of a warning.
2660 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2661 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2662 = 0s. The bug is otherwise harmless.
2664 PH/07 There was a bug in the dovecot authenticator such that the value of
2665 $auth1 could be overwritten, and so not correctly preserved, after a
2666 successful authentication. This usually meant that the value preserved by
2667 the server_setid option was incorrect.
2669 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2671 PH/09 Installed PCRE release 7.0.
2673 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2674 run for batched SMTP input. It is now run at the start of every message
2675 in the batch. While fixing this I discovered that the process information
2676 (output by running exiwhat) was not always getting set for -bs and -bS
2677 input. This is fixed, and it now also says "batched" for BSMTP.
2679 PH/11 Added control=no_pipelining.
2681 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2682 patch, slightly modified), and move the expansion of helo_data till after
2683 the connection is made in the smtp transport (so it can use these
2686 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2688 PH/14 Added log_selector = +pid.
2690 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2692 PH/16 Add ${if forany and ${if forall.
2694 PH/17 Added dsn_from option to vary the From: line in DSNs.
2696 PH/18 Flush SMTP output before performing a callout, unless control =
2697 no_callout_flush is set.
2699 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2700 was true (the default) a successful delivery failed to delete the retry
2701 item, thus causing premature timeout of the address. The bug is now
2704 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2706 PH/21 Long custom messages for fakedefer and fakereject are now split up
2707 into multiline responses in the same way that messages for "deny" and
2708 other ACL rejections are.
2710 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2711 with slight modification.
2713 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2714 draft, changing the syntax and factoring some duplicate code".
2716 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2717 for deliveries of the second and subsequent messages over the same SMTP
2720 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2721 ${reduce, with only minor "tidies".
2723 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2725 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2726 expansion side effects.
2728 PH/27 When a message times out after an over-quota error from an Exim-imposed
2729 quota, the bounce message says "mailbox is full". This message was not
2730 being given when it was a system quota that was exceeded. It now should
2733 MH/03 Made $recipients available in local_scan(). local_scan() already has
2734 better access to the recipient list through recipients_list[], but
2735 $recipients can be useful in postmaster-provided expansion strings.
2737 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2738 in the case of a MAIL command with additional options following the
2739 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2740 were accidentally chopped off.
2742 PH/29 SMTP synchronization checks are implemented when a command is read -
2743 there is a check that no more input is waiting when there shouldn't be
2744 any. However, for some commands, a delay in an ACL can mean that it is
2745 some time before the response is written. In this time, more input might
2746 arrive, invalidly. So now there are extra checks after an ACL has run for
2747 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2748 pipelining has not been advertised.
2750 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2752 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2753 returned in the SMTP response when smtp_return_error_details was false.
2754 This has been fixed.
2756 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2757 instead of the C I/O that was originally supplied, because problems were
2758 reported on Solaris.
2760 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2761 Exim which did not show up earlier: it was assuming that a call to
2762 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2763 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2764 was a macro that became an assignment, so it seemed to work. This has
2765 changed to a proper function call with a void return, hence the compile
2766 error. Exim's code has been fixed.
2768 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2771 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2773 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2775 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2776 because it turns out to be too big or there is a timeout) there is no
2777 "Completed" line in the log. When some messages of this type were
2778 selected by exigrep, they were listed as "not completed". Others were
2779 picked up by some special patterns. I have improved the selection
2780 criteria to be more general.
2782 PH/38 The host_find_failed option in the manualroute router can now be set
2783 to "ignore", to completely ignore a host whose IP address cannot be
2784 found. If all hosts are ignored, the behaviour is controlled by the new
2785 host_all_ignored option.
2787 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2788 homing or because of multiple MX records with /mx) generated more than
2789 one IP address, and the following item turned out to be the local host,
2790 all the secondary addresses of the first item were incorrectly removed
2791 from the list, along with the local host and any following hosts (which
2792 is what is supposed to happen).
2794 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2795 whoever called Exim into the -H file. In the case of the daemon it was
2796 behaving confusingly. When first started, it used values for whoever
2797 started the daemon, but after a SIGHUP it used the Exim user (because it
2798 calls itself on a restart). I have changed the code so that it now always
2801 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2802 message are rejected with the same error (e.g. no authentication or bad
2803 sender address), and a DATA command is nevertheless sent (as can happen
2804 with PIPELINING or a stupid MUA), the error message that was given to the
2805 RCPT commands is included in the rejection of the DATA command. This is
2806 intended to be helpful for MUAs that show only the final error to their
2809 PH/42 Another patch from the Sieve maintainer.
2811 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2812 Eximstats - Fixed some broken HTML links and added missing column headers
2814 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2815 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2817 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2819 PH/43 Yet another patch from the Sieve maintainer.
2821 PH/44 I found a way to check for a TCP/IP connection going away before sending
2822 the response to the final '.' that terminates a message, but only in the
2823 case where the client has not sent further data following the '.'
2824 (unfortunately, this is allowed). However, in many cases there won't be
2825 any further data because there won't be any more messages to send. A call
2826 to select() can be used: if it shows that the input is "ready", there is
2827 either input waiting, or the socket has been closed. An attempt to read
2828 the next input character can distinguish the two cases. Previously, Exim
2829 would have sent an OK response which the client would never have see.
2830 This could lead to message repetition. This fix should cure that, at
2831 least in a lot of common cases.
2833 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2834 advertised in response to EHLO.
2840 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2841 fixed by 4.65/MH/01 (is this a record?) are fixed:
2843 (i) An empty string was always treated as zero by the numeric comparison
2844 operators. This behaviour has been restored.
2846 (ii) It is documented that the numeric comparison operators always treat
2847 their arguments as decimal numbers. This was broken in that numbers
2848 starting with 0 were being interpreted as octal.
2850 While fixing these problems I realized that there was another issue that
2851 hadn't been noticed. Values of message_size_limit (both the global option
2852 and the transport option) were treated as octal if they started with 0.
2853 The documentation was vague. These values are now always treated as
2854 decimal, and I will make that clear in the documentation.
2860 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2861 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2864 MH/01 Don't check that the operands of numeric comparison operators are
2865 integers when their expansion is in "skipping" mode (fixes bug
2866 introduced by 4.64-PH/07).
2868 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2869 child addresses, Exim now panics and dies. Previously, because the count
2870 is held in a short int, deliveries were likely to be lost. As such a
2871 large number of recipients for a single message is ridiculous
2872 (performance will be very, very poor), I have chosen to impose a limit
2873 rather than extend the field.
2879 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2880 leftover -K file (the existence of which was triggered by #402).
2881 While we were at it, introduced process PID as part of the -K
2882 filename. This should rule out race conditions when creating
2885 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2886 processing considerably. Previous code took too long for large mails,
2887 triggering a timeout which in turn triggers #401.
2889 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2890 in the DK code in transports.c. sendfile() is not really portable,
2891 hence the _LINUX specificness.
2893 TF/01 In the add_headers option to the mail command in an Exim filter,
2894 there was a bug that Exim would claim a syntax error in any
2895 header after the first one which had an odd number of characters
2898 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2899 callout verification, Exim cached a "reject" for the entire domain. This
2900 is correct for most verifications, but it is not correct for a recipient
2901 verification with use_sender or use_postmaster set, because in that case
2902 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2903 case of MAIL FROM:<> rejection from other early rejections (e.g.
2904 rejection of HELO). When verifying a recipient using a non-null MAIL
2905 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2906 Whatever the result of the callout, the value of the domain cache is
2907 left unchanged (for any other kind of callout, getting as far as trying
2908 RCPT means that the domain itself is ok).
2910 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2913 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2914 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2915 session, the daemon ignores ECONNECT errors and logs others; it now
2916 ignores EPIPE as well.
2918 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2919 (quoted-printable decoding).
2921 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2922 later the small subsequent patch to fix an introduced bug.
2924 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2926 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2928 PH/08 An error is now given if message_size_limit is specified negative.
2930 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2931 to be given (somewhat) arbitrary names.
2933 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2936 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2937 miscellaneous code fixes
2939 PH/10 Added the log_reject_target ACL modifier to specify where to log
2942 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2943 hostname. This is wrong, because it relates to the incoming message (and
2944 probably the interface on which it is arriving) and not to the outgoing
2945 callout (which could be using a different interface). This has been
2946 changed to use the value of the helo_data option from the smtp transport
2947 instead - this is what is used when a message is actually being sent. If
2948 there is no remote transport (possible with a router that sets up host
2949 addresses), $smtp_active_hostname is used.
2951 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2952 tweaks were necessary in order to get it to work (see also 21 below):
2953 (a) The code assumed that strncpy() returns a negative number on buffer
2954 overflow, which isn't the case. Replaced with Exim's string_format()
2956 (b) There were several signed/unsigned issues. I just did the minimum
2957 hacking in of casts. There is scope for a larger refactoring.
2958 (c) The code used strcasecmp() which is not a standard C function.
2959 Replaced with Exim's strcmpic() function.
2960 (d) The code set only $1; it now sets $auth1 as well.
2961 (e) A simple test gave the error "authentication client didn't specify
2962 service in request". It would seem that Dovecot has changed its
2963 interface. Fortunately there's a specification; I followed it and
2964 changed what the client sends and it appears to be working now.
2966 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2969 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2970 address A is aliased to B and C, where B exists and C does not. Without
2971 -v the output is "A verified" because verification stops after a
2972 successful redirection if more than one address is generated. However,
2973 with -v the child addresses are also verified. Exim was outputting "A
2974 failed to verify" and then showing the successful verification for C,
2975 with its parentage. It now outputs "B failed to verify", showing B's
2976 parentage before showing the successful verification of C.
2978 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2979 look up a TXT record in a specific list after matching in a combined
2982 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2983 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2984 they consult the DNS. I had assumed they would set it the way they
2985 wanted; and indeed my experiments on Linux seem to show that in some
2986 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2987 To be on the safe side, however, I have now made the interface to
2988 host_find_byname() similar to host_find_bydns(), with an argument
2989 containing the DNS resolver options. The host_find_byname() function now
2990 sets these options at its start, just as host_find_bydns() does. The smtp
2991 transport options dns_qualify_single and dns_search_parents are passed to
2992 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2993 of host_find_byname() use the default settings of RES_DEFNAMES
2994 (qualify_single) but not RES_DNSRCH (search_parents).
2996 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2997 spool_read_header() do less string testing, by means of a preliminary
2998 switch on the second character of optional "-foo" lines. (This is
2999 overdue, caused by the large number of possibilities that now exist.
3000 Originally there were few.) While I was there, I also converted the
3001 str(n)cmp tests so they don't re-test the leading "-" and the first
3002 character, in the hope this might squeeze out yet more improvement.
3004 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3005 flag allowing group syntax was set by the header_syntax check but not
3006 turned off, possible causing trouble later; (2) The flag was not being
3007 set at all for the header_verify test, causing "group"-style headers to
3008 be rejected. I have now set it in this case, and also caused header_
3009 verify to ignore an empty address taken from a group. While doing this, I
3010 came across some other cases where the code for allowing group syntax
3011 while scanning a header line wasn't quite right (mostly, not resetting
3012 the flag correctly in the right place). These bugs could have caused
3013 trouble for malformed header lines. I hope it is now all correct.
3015 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3016 with the "reply" argument non-NULL. The code, however (which originally
3017 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3018 but it didn't always do it. This confused somebody who was copying the
3019 code for some other use. I have removed all the tests.
3021 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3022 feature that was used to support insecure browsers during the U.S. crypto
3023 embargo. It requires special client support, and Exim is probably the
3024 only MTA that supported it -- and would never use it because real RSA is
3025 always available. This code has been removed, because it had the bad
3026 effect of slowing Exim down by computing (never used) parameters for the
3027 RSA_EXPORT functionality.
3029 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3030 authenticator to fail if there's a tab character in the incoming data
3031 (there should never be unless someone is messing about, as it's supposed
3032 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3033 if the connection is using TLS or if the remote IP is the same as the
3034 local IP, and the "valid-client-cert option" if a client certificate has
3037 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3038 authenticators. This can be used for authorization after authentication
3039 succeeds. (In the case of plaintext, it servers for both authentication
3042 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3043 if any retry times were supplied.
3045 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3046 connection, where there is no client IP address to check. In this
3047 situation, the verify now always succeeds.
3049 PH/25 Applied John Jetmore's -Mset patch.
3051 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3053 PH/27 In a string expansion for a processed (not raw) header when multiple
3054 headers of the same name were present, leading whitespace was being
3055 removed from all of them, but trailing whitespace was being removed only
3056 from the last one. Now trailing whitespace is removed from each header
3057 before concatenation. Completely empty headers in a concatenation (as
3058 before) are ignored.
3060 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3061 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3063 PH/29 [Removed. This was a change that I later backed out, and forgot to
3064 correct the ChangeLog entry (that I had efficiently created) before
3065 committing the later change.]
3067 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3068 address errors (4xx response to RCPT) over the same connection as other
3069 messages routed to the same hosts. Such deliveries are always "forced",
3070 so retry times are not inspected. This resulted in far too many retries
3071 for the affected addresses. The effect occurred only when there were more
3072 hosts than the hosts_max_try setting in the smtp transport when it had
3073 the 4xx errors. Those hosts that it had tried were not added to the list
3074 of hosts for which the message was waiting, so if all were tried, there
3075 was no problem. Two fixes have been applied:
3077 (i) If there are any address or message errors in an SMTP delivery, none
3078 of the hosts (tried or untried) are now added to the list of hosts
3079 for which the message is waiting, so the message should not be a
3080 candidate for sending over the same connection that was used for a
3081 successful delivery of some other message. This seems entirely
3082 reasonable: after all the message is NOT "waiting for some host".
3083 This is so "obvious" that I'm not sure why it wasn't done
3084 previously. Hope I haven't missed anything, but it can't do any
3085 harm, as the worst effect is to miss an optimization.
3087 (ii) If, despite (i), such a delivery is accidentally attempted, the
3088 routing retry time is respected, so at least it doesn't keep
3089 hammering the server.
3091 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3092 in ${readsocket because some servers need this prod.
3094 PH/32 Added some extra debug output when updating a wait-xxx database.
3096 PH/33 The hint "could be header name not terminated by colon", which has been
3097 given for certain expansion errors for a long time, was not being given
3098 for the ${if def:h_colon_omitted{... case.
3100 PH/34 The spec says: "With one important exception, whenever a domain list is
3101 being scanned, $domain contains the subject domain." There was at least
3102 one case where this was not true.
3104 PH/35 The error "getsockname() failed: connection reset by peer" was being
3105 written to the panic log as well as the main log, but it isn't really
3106 panic-worthy as it just means the connection died rather early on. I have
3107 removed the panic log writing for the ECONNRESET error when getsockname()
3110 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3111 runs only) independently of the message's sender address. This meant
3112 that, if the 4xx error was in fact related to the sender, a different
3113 message to the same recipient with a different sender could confuse
3114 things. In particular, this can happen when sending to a greylisting
3115 server, but other circumstances could also provoke similar problems.
3116 I have changed the default so that the retry time for these errors is now
3117 based a combination of the sender and recipient addresses. This change
3118 can be overridden by setting address_retry_include_sender=false in the
3121 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3122 remote server are returned as part of bounce messages. This was not
3123 happening for LMTP over a pipe (the lmtp transport), but now it is the
3124 same for both kinds of LMTP.
3126 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3127 in header lines that were in fact CNAMEs. This is no longer the case.
3129 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3130 and queue runs started by the daemon processed all messages. This has
3131 been fixed so that -R and -S can now usefully be given with -q<time>.
3133 PH/40 Import PCRE release 6.7 (fixes some bugs).
3135 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3137 PH/42 Give an error if -q is specified more than once.
3139 PH/43 Renamed the variables $interface_address and $interface_port as
3140 $received_ip_address and $received_port, to make it clear that these
3141 values apply to message reception, and not to the outgoing interface when
3142 a message is delivered. (The old names remain recognized, of course.)
3144 PH/44 There was no timeout on the connect() call when using a Unix domain
3145 socket in the ${readsocket expansion. There now is.
3147 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3148 be meaningful with "accept".
3150 SC/01 Eximstats V1.43
3151 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3153 SC/02 Eximstats V1.44
3154 Use a glob alias rather than an array ref in the generated
3155 parser. This improves both readability and performance.
3157 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3158 Collect SpamAssassin and rejection statistics.
3159 Don't display local sender or destination tables unless
3160 there is data to show.
3161 Added average volumes into the top table text output.
3163 SC/04 Eximstats V1.46
3164 Collect data on the number of addresses (recipients)
3165 as well as the number of messages.
3167 SC/05 Eximstats V1.47
3168 Added 'Message too big' to the list of mail rejection
3169 reasons (thanks to Marco Gaiarin).
3171 SC/06 Eximstats V1.48
3172 Mainlog lines which have GMT offsets and are too short to
3173 have a flag are now skipped.
3175 SC/07 Eximstats V1.49 (Alain Williams)
3176 Added the -emptyok flag.
3178 SC/08 Eximstats V1.50
3179 Fixes for obtaining the IP address from reject messages.
3181 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3182 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3183 whitespace changes from 4.64-PH/27
3185 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3188 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3189 are found, allow negative numbers in numeric criteria)
3191 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3193 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3194 to match changes made in 4.64-PH/43
3196 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3198 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3199 "domain" is actually an IP address, and force a failure. This locks out
3200 those revolvers/nameservers that support "A-for-A" lookups, in
3201 contravention of the specifications.
3203 PH/48 When a host name was looked up from an IP address, and the subsequent
3204 forward lookup of the name timed out, the host name was left in
3205 $sender_host_name, contrary to the specification.
3207 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3208 restricted to single-key lookups, Exim was not diagnosing an error if
3209 * or *@ was used with a query-style lookup.
3211 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3213 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3214 long ago, but noone interested enough thought of it. Let's just say that
3215 the "1.1" means that there are some new functions that weren't there at
3216 some point in the past.
3218 PH/51 Error processing for expansion failure of helo_data from an smtp
3219 transport during callout processing was broken.
3221 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3222 tested/used via the -bh/-bhc/-bs options.
3224 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3225 bug, fixed in subsequent PCRE releases).
3227 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3228 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3230 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3236 SC/01 Use a glob alias rather than an array ref in eximstats generated
3237 parser. This improves both readability and performance.
3239 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3240 Don't display local sender or destination tables in eximstats unless
3241 there is data to show.
3242 Added average volumes into the eximstats top table text output.
3244 SC/03 Collect data on the number of addresses (recipients) as well
3245 as the number of messages in eximstats.
3247 TF/01 Correct an error in the documentation for the redirect router. Exim
3248 does (usually) call initgroups() when daemonizing.
3250 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3251 with consistent privilege compared to when running as a daemon.
3253 TF/03 Note in the spec that $authenticated_id is not set for local
3254 submissions from trusted users.
3256 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3257 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3259 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3260 by adding some example configuration directives to the default
3261 configuration file. A little bit of work is required to uncomment the
3262 directives and define how usernames and passwords are checked, but
3263 there is now a framework to start from.
3265 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3266 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3267 without this. I don't know how relevant this is to other LDAP libraries.
3269 PH/02 Add the verb name to the "unknown ACL verb" error.
3271 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3273 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3275 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3276 directory not expanded when it should be if an expanded home directory
3277 was set for the address (which is overridden by the transport).
3279 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3282 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3283 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3284 because it is too late at that time, and has no effect.
3286 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3287 security issue with \' (bugzilla #107). I could not use the
3288 PQescapeStringConn() function, because it needs a PGconn value as one of
3291 PH/08 When testing addresses using -bt, indicate those final addresses that
3292 are duplicates that would not cause an additional delivery. At least one
3293 person was confused, thinking that -bt output corresponded to deliveries.
3294 (Suppressing duplicates isn't a good idea as you lose the information
3295 about possibly different redirections that led to the duplicates.)
3297 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3298 systems where poll() doesn't work, in particular OS X.
3300 PH/10 Added more information to debugging output for retry time not reached.
3302 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3303 operations in malware.c.
3305 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3308 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3309 syslog_duplication set false, log lines that would normally be written
3310 both the the main log and to the reject log were not written to syslog at
3313 PH/14 In the default configuration, change the use of "message" in ACL warn
3314 statements to "add_header".
3316 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3317 not followed by a command (e.g. "seen endif").
3319 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3320 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3323 PH/17 Added extra conditions to the default value of delay_warning_condition
3327 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3328 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3329 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3332 The Auto-Submitted: and various List- headers are standardised, whereas I
3333 don't think Precedence: ever was.
3335 PH/18 Refactored debugging code in route_finduser() to show more information,
3336 in particular, the error code if getpwnam() issues one.
3338 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3339 This is apparently needed in addition to the PH/07 change above to avoid
3340 any possible encoding problems.
3342 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3343 but not after initializing Perl.
3345 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3346 output them only if debugging. By default they are written stderr,
3347 apparently, which is not desirable.
3349 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3352 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3355 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3357 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3358 authenticated or an ident call has been made. Suppress the default
3359 values for $authenticated_id and $authenticated_sender (but permit -oMai
3360 and -oMas) when testing with -bh.
3362 PH/24 Re-jigged the order of the tests in the default configuration so that the
3363 tests for valid domains and recipients precede the DNS black list and CSA
3364 tests, on the grounds that those ones are more expensive.
3366 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3367 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3368 This bug exists in every version of Exim that I still have, right back to
3371 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3372 However, an attempt to turn on case-sensitivity in a regex key by
3373 including (?-i) didn't work because the subject string was already
3374 lowercased, and the effects were non-intuitive. It turns out that a
3375 one-line patch can be used to allow (?-i) to work as expected.
3381 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3382 other effects) broke the use of negated acl sub-conditions.
3384 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3387 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3388 "Deny" causes Exim to reject the incoming connection with a 554 error.
3389 Unfortunately, if there is a major crisis, such as a disk failure,
3390 tcp-wrappers gives "deny", whereas what one would like would be some
3391 kind of temporary error. A kludge has been added to help with this.
3392 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3393 554 error is used if errno is still zero or contains ENOENT (which occurs
3394 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3397 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3399 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3400 errors. Otherwise a message that provokes a temporary error (when other
3401 messages do not) can cause a whole host to time out.
3403 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3404 addresses were routed directly to files or pipes from a redirect router.
3405 File deliveries just didn't batch; pipe deliveries might have suffered
3408 PH/06 A failure to get a lock for a hints database would erroneously always say
3409 "Failed to get write lock", even when it was really a read lock.
3411 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3412 of 0600. This has been changed to use the value of the lockfile_mode
3413 option (which defaults to 0600).
3415 PH/08 Applied small patch from the Sieve maintainer.
3417 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3418 folder from quota calculations, a direct delivery into this folder messed
3419 up the contents of the maildirsize file. This was because the regex was
3420 used only to exclude .Trash (or whatever) when the size of the mailbox
3421 was calculated. There was no check that a delivery was happening into an
3422 excluded directory. This bug has been fixed by ignoring all quota
3423 processing for deliveries into excluded directories.
3425 PH/10 Added the maildirfolder_create_regex option to appendfile.
3431 PH/01 The code for finding all the local interface addresses on a FreeBSD
3432 system running IPv6 was broken. This may well have applied to all BSD
3433 systems, as well as to others that have similar system calls. The broken
3434 code found IPv4 interfaces correctly, but gave incorrect values for the
3435 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3436 that it would not match correctly against @[] and not recognize the IPv6
3439 PH/02 The ipliteral router was not recognizing addresses of the form user@
3440 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3442 PH/03 Added disable_ipv6.
3444 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3445 decoded form, because it is most often used to construct To: headers
3446 lines in autoreplies, and the decoded form may well be syntactically
3447 invalid. However, $reply_address has leading white space removed, and all
3448 newlines turned into spaces so that the autoreply transport does not
3451 PH/05 If group was specified without a user on a router, and no group or user
3452 was specified on a transport, the group from the router was ignored.
3454 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3455 for visible compile-time settings that can be used to change these
3456 numbers, for those that want even more. Backwards compatibility with old
3457 spool files has been maintained. However, going back to a previous Exim
3458 release will lost any variables that are in spool files.
3460 PH/07 Two small changes when running in the test harness: increase delay when
3461 passing a TCP/IP connection to a new process, in case the original
3462 process has to generate a bounce, and remove special handling of
3463 127.0.0.2 (sic), which is no longer necessary.
3465 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3466 be the same on different OS.
3468 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3471 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3472 whether --show-vars was specified or not
3474 JJ/02 exipick: Added support for new ACL variable spool format introduced
3477 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3478 syntactically invalid From: or Reply-to: line, and a filter used this to
3479 generate an autoreply, and therefore failed to obtain an address for the
3480 autoreply, Exim could try to deliver to a non-existent relative file
3481 name, causing unrelated and misleading errors. What now happens is that
3482 it logs this as a hard delivery error, but does not attempt to create a
3485 PH/11 The exinext utility has a -C option for testing purposes, but although
3486 the given file was scanned by exinext itself; it wasn't being passed on
3487 when Exim was called.
3489 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3490 an end-of-file indication when reading a command response.
3492 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3493 compiled. In many other places in Exim, IPv6 addresses are always
3494 recognized, so I have changed this. It also means that IPv4 domain
3495 literals of the form [IPV4:n.n.n.n] are now always recognized.
3497 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3498 used if the router is not running as root, for example, when verifying at
3499 ACL time, or when using -bh. The debugging output from this situation was
3500 non-existent - all you got was a failure to exec. I have made two
3503 (a) Failures to set uid/gid, the current directory, or a process leader
3504 in a subprocess such as that created by queryprogram now generate
3505 suitable debugging output when -d is set.
3507 (b) The queryprogram router detects when it is not running as root,
3508 outputs suitable debugging information if -d is set, and then runs
3509 the subprocess without attempting to change uid/gid.
3511 PH/15 Minor change to Makefile for building test_host (undocumented testing
3514 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3515 additional section of a DNS packet that returns MX or SRV records.
3516 Instead, it always explicitly searches for A/AAAA records. This avoids
3517 major problems that occur when a DNS server includes only records of one
3518 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3519 fixed another bug: if SRV records were looked up and the corresponding
3520 address records were *not* found in the additional section, the port
3521 values from the SRV records were lost.
3523 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3524 using the correct key (the original address) when searching the retry
3525 rules in order to find which one to use for generating the retry hint.
3527 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3528 adding the default one. Similarly, if it contains a Reply-To: header, the
3529 errors_reply_to option, if set, is not used.
3531 PH/19 When calculating a retry time, Exim used to measure the "time since
3532 failure" by looking at the "first failed" field in the retry record. Now
3533 it does not use this if it is later than than the arrival time of the
3534 message. Instead it uses the arrival time. This makes for better
3535 behaviour in cases where some deliveries succeed, thus re-setting the
3536 "first failed" field. An example is a quota failure for a huge message
3537 when small messages continue to be delivered. Without this change, the
3538 "time since failure" will always be short, possible causing more frequent
3539 delivery attempts for the huge message than are intended.
3540 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3542 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3543 $1, $2, $3) because the numerical variables can be reset during some
3544 expansion items (e.g. "match"), thereby losing the authentication data.
3546 PH/21 Make -bV show the size of off_t variables so that the test suite can
3547 decide whether to run tests for quotas > 2G.
3549 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3550 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3551 filecount value is greater than 2G or if a quota value is greater than 2G
3552 on a system where the size of off_t is not greater than 4, a panic error
3555 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3556 never match. The debug and -bh output now contains an explicit error
3557 message indicating a malformed IPv4 address or mask.
3559 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3560 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3561 PH/23 above applies.
3563 PH/25 Do not write to syslog when running in the test harness. The only
3564 occasion when this arises is a failure to open the main or panic logs
3565 (for which there is an explicit test).
3567 PH/26 Added the /no_tell option to "control=freeze".
3569 PH/27 If a host name lookup failed very early in a connection, for example, if
3570 the IP address matched host_lookup and the reverse lookup yielded a name
3571 that did not have a forward lookup, an error message of the form "no IP
3572 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3573 could be logged. Now it outputs the IP address instead of "NULL".
3575 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3576 allows the sender and the authenticated sender to be set when
3577 submitting a message from within Exim. Since child_open_exim() is
3578 documented for local_scan(), the new function should be too.
3580 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3581 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3582 results in an empty string is now treated as unset.
3584 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3586 PH/31 Added sender_verify_fail logging option.
3588 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3589 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3590 tidied the source and removed it altogether.
3592 PH/33 When a queue run was abandoned because the load average was too high, a
3593 log line was always written; now it is written only if the queue_run log
3594 selector is set. In addition, the log line for abandonment now contains
3595 information about the queue run such as the pid. This is always present
3596 in "start" and "stop" lines but was omitted from the "abandon" line.
3598 PH/34 Omit spaces between a header name and the colon in the error message that
3599 is given when verify = headers_syntax fails (if there are lots of them,
3600 the message gets confusing).
3602 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3603 names, as there are now some PTR records that contain slashes. This check
3604 is only to protect against broken name servers that fall over on strange
3605 characters, so the fact that it applies to all lookups doesn't matter.
3607 PH/36 Now that the new test suite is complete, we can remove some of the
3608 special code in Exim that was needed for the old test suite. For example,
3609 sorting DNS records because real resolvers return them in an arbitrary
3610 order. The new test suite's fake resolver always returns records in the
3613 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3614 bounces) except when queue_only is set, to avoid logging races between
3615 the different processes.
3617 PH/38 Panic-die if .include specifies a non-absolute path.
3619 PH/39 A tweak to the "H" retry rule from its user.
3621 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3622 a label. They prevented compilation on older perls.
3624 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3625 a warning to be raised on newish perls.
3627 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3628 on queue. Changes to match documented behaviour of showing count of
3629 messages matching specified criteria.
3631 PH/40 Changed the default ident timeout from 30s to 5s.
3633 PH/41 Added support for the use of login_cap features, on those BSD systems
3634 that have them, for controlling the resources used by pipe deliveries.
3636 PH/42 The content-scanning code uses fopen() to create files in which to put
3637 message data. Previously it was not paying any attention to the mode of
3638 the files. Exim runs with umask(0) because the rest of the code creates
3639 files with open(), and sets the required mode explicitly. Thus, these
3640 files were ending up world-writeable. This was not a big issue, because,
3641 being within the spool directory, they were not world-accessible. I have
3642 created a function called modefopen, which takes an additional mode
3643 argument. It sets umask(777), creates the file, chmods it to the required
3644 mode, then resets the umask. All the relevant calls to fopen() in the
3645 content scanning code have been changed to use this function.
3647 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3648 to 24 hours. This avoids potential overflow problems when processing G
3649 and H retry rules. I suspect nobody ever tinkers with this value.
3651 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3653 PH/45 When the plaintext authenticator is running as a client, the server's
3654 challenges are checked to ensure they are valid base64 strings. By
3655 default, the authentication attempt is cancelled if an invalid string is
3656 received. Setting client_ignore_invalid_base64 true ignores these errors.
3657 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3658 they are received. Thus, the responses can be made to depend on the
3659 challenges. If an invalid string is ignored, an empty string is placed in
3662 PH/46 Messages that are created by the autoreply transport now contains a
3663 References: header, in accordance with RFCs 2822 and 3834.
3665 PH/47 Added authenticated_sender_force to the smtp transport.
3667 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3669 PH/49 Installed latest patch from the Sieve maintainer.
3671 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3672 was also set, the appendfile transport was unnecessarily scanning a
3673 directory of message files (e.g. for maildir delivery) to find the count
3674 of files (along with the size), even though it did not need this
3675 information. It now does the scan only if it needs to find either the
3676 size of the count of files.
3678 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3680 PH/52 Two bugs concerned with error handling when the smtp transport is
3683 (i) Exim was not creating retry information for temporary errors given
3684 for individual recipients after the DATA command when the smtp transport
3685 was used in LMTP mode. This meant that they could be retried too
3686 frequently, and not timed out correctly.
3688 (ii) Exim was setting the flag that allows error details to be returned
3689 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3690 recipients that were returned after the DATA command.
3692 PH/53 This is related to PH/52, but is more general: for any failing address,
3693 when detailed error information was permitted to be returned to the
3694 sender, but the error was temporary, then after the final timeout, only
3695 "retry timeout exceeded" was returned. Now it returns the full error as
3696 well as "retry timeout exceeded".
3698 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3699 do this, and (what is worse) MTAs that accept it.
3701 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3702 will now be deprecated.
3704 PH/56 New os.c-cygwin from the Cygwin maintainer.
3706 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3707 formats (previously only available in exim formats via -bpr, -bpru,
3708 and -bpra. Now also available in native and exiqgrep formats)
3710 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3711 with very large, slow to parse queues
3713 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3715 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3717 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3718 responses to authentication challenges, though it was showing the
3719 challenges; (ii) I've removed the CR characters from the debug output for
3722 PH/58 Allow for the insertion of a newline as well as a space when a string
3723 is turned into more than one encoded-word during RFC 2047 encoding. The
3724 Sieve code now uses this.
3726 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3727 data_4xx, lost_connection, tls_required.
3729 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3730 message was being sent as an SMTP response.
3732 PH/61 Add -l and -k options to exicyclog.
3734 PH/62 When verifying, if an address was redirected to one new address, so that
3735 verification continued, and the new address failed or deferred after
3736 having set something in $address_data, the value of $address_data was not
3737 passed back to the ACL. This was different to the case when no
3738 redirection occurred. The value is now passed back in both cases.
3740 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3741 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3742 use login_cap.h, so on its own it isn't the distinguishing feature. The
3743 new name refers directly to the setclassresources() function.
3745 PH/65 Added configuration files for NetBSD3.
3747 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3749 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3750 is preferred over IPv4.
3752 PH/68 The bounce_return_message and bounce_return_body options were not being
3753 honoured for bounces generated during the reception of non-SMTP messages.
3754 In particular, this applied to messages rejected by the ACL. This bug has
3755 been fixed. However, if bounce_return_message is true and bounce_return_
3756 body is false, the headers that are returned for a non-SMTP message
3757 include only those that have been read before the error was detected.
3758 (In the case of an ACL rejection, they have all been read.)
3760 PH/69 The HTML version of the specification is now built in a directory called
3761 spec_html instead of spec.html, because the latter looks like a path with
3762 a MIME-type, and this confuses some software.
3764 PH/70 Catch two compiler warnings in sieve.c.
3766 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3767 function verify_get_ident() calls ip_connect() to connect a socket, but
3768 if the "connect()" function timed out, ip_connect() used to close the
3769 socket. However, verify_get_ident() also closes the socket later, and in
3770 between Exim writes to the log, which may get opened at this point. When
3771 the socket was closed in ip_connect(), the log could get the same file
3772 descriptor number as the socket. This naturally causes chaos. The fix is
3773 not to close the socket in ip_connect(); the socket should be closed by
3774 the function that creates it. There was only one place in the code where
3775 this was missing, in the iplookup router, which I don't think anybody now
3776 uses, but I've fixed it anyway.
3778 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3779 well as to direct DNS lookups. Otherwise the handling of names in host
3780 lists is inconsistent and therefore confusing.
3786 PH/01 Two changes to the default runtime configuration:
3788 (1) Move the checks for relay_from_hosts and authenticated clients from
3789 after to before the (commented out) DNS black list checks.
3791 (2) Add control=submission to the relay_from_hosts and authenticated
3792 clients checks, on the grounds that messages accepted by these
3793 statements are most likely to be submissions.
3795 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3797 (1) Generate an error if the third argument for the ${prvs expansion is
3800 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3803 (3) Reset the variables that are obtained from the first argument of
3804 ${prvscheck and used in the second argument before leaving the code,
3805 because their memory is reclaimed, so using them afterwards may do
3808 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3809 one (it's much easier than Tom thought :-).
3811 (5) Because of (4), we can now allow for the use of $prvscheck_result
3812 inside the third argument.
3814 PH/03 For some reason, the default setting of PATH when running a command from
3815 a pipe transport was just "/usr/bin". I have changed it to
3818 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3819 anything to be listed in the output from -bV.
3821 PH/05 When a filter generated an autoreply, the entire To: header line was
3822 quoted in the delivery log line, like this:
3824 => >A.N.Other <ano@some.domain> <original@ddress> ...
3826 This has been changed so that it extracts the operative address. There
3827 may be more than one such address. If so, they are comma-separated, like
3830 => >ano@some.domain,ona@other.domain <original@ddress> ...
3832 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3833 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3834 not being looked up in the rDNS to get a host name, Exim was showing the
3835 IP address twice in Received: lines, even though the IP addresses were
3836 identical. For example:
3838 Received: from [1.2.3.4] (helo=[1.2.3.4])
3840 However, if the real host name was known, it was omitting the HELO data
3841 if it matched the actual IP address. This has been tidied up so that it
3842 doesn't show the same IP address twice.
3844 PH/07 When both +timestamp and +memory debugging was on, the value given by
3845 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3846 called by the debug printing, thereby overwriting the timestamp buffer.
3847 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3849 PH/08 When the original message was included in an autoreply transport, it
3850 always said "this is a copy of the message, including all the headers",
3851 even if body_only or headers_only was set. It now gives an appropriate
3854 PH/09 Applied a patch from the Sieve maintainer which:
3856 o fixes some comments
3857 o adds the (disabled) notify extension core
3858 o adds some debug output for the result of if/elsif tests
3859 o points to the current vacation draft in the documentation
3860 and documents the missing references header update
3864 o fixes a bug in processing the envelope test (when testing
3865 multiple envelope elements, the last element determined the
3868 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3869 Electronic Mail") by including:
3871 Auto-submitted: auto-generated
3873 in the messages that it generates (bounce messages and others, such as
3874 warnings). In the case of bounce messages for non-SMTP messages, there was
3875 also a typo: it was using "Auto_submitted" (underscore instead of
3876 hyphen). Since every message generated by Exim is necessarily in response
3877 to another message, thes have all been changed to:
3879 Auto-Submitted: auto-replied
3881 in accordance with these statements in the RFC:
3883 The auto-replied keyword:
3885 - SHOULD be used on messages sent in direct response to another
3886 message by an automatic process,
3888 - MUST NOT be used on manually-generated messages,
3890 - MAY be used on Delivery Status Notifications (DSNs) and Message
3891 Disposition Notifications (MDNs),
3893 - MUST NOT be used on messages generated by automatic or periodic
3894 processes, except for messages which are automatic responses to
3897 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3898 to the default Received: header definition.
3900 PH/12 Added log selector acl_warn_skipped (default on).
3902 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3903 variables because (a) they are in the wrong storage pool and (b) even if
3904 they were copied, it wouldn't work properly because of the caching.
3906 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3907 checking when decoding. Apparently there are clients that generate
3908 overlong encoded strings. Why am I not surprised?
3910 PH/15 If the first argument of "${if match_address" was not empty, but did not
3911 contain an "@" character, Exim crashed. Now it writes a panic log message
3912 and treats the condition as false.
3914 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3916 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3917 extension "envelope-auth". The code is finished and in agreement with
3918 other implementations, but there is no documentation so far and in fact,
3919 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3920 not changing the active code.
3922 Print executed "if" and "elsif" statements when debugging is used. This
3923 helps a great deal to understand what a filter does.
3925 Document more things not specified clearly in RFC3028. I had all this
3926 sorted out, when out of a sudden new issues came to my mind. Oops."
3928 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3931 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3932 canonical form (as documented). However, after a host name lookup from
3933 the IP address, check_host() was doing a simple string comparison with
3934 addresses acquired from the DNS when checking that the found name did
3935 have the original IP as one of its addresses. Since any found IPv6
3936 addresses are likely to be in abbreviated form, the comparison could
3937 fail. Luckily, there already exists a function for doing the comparison
3938 by converting both addresses to binary, so now that is used instead of
3939 the text comparison.
3941 PH/20 There was another similar case to PH/19, when a complete host name was
3942 given in a host list; looking up its IP address could give an abbreviated
3943 form, whereas the current host's name might or might not be abbreviated.
3944 The same fix has been applied.
3950 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3951 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3954 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3955 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3957 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3959 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3960 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3961 Also, for "Auto-Submitted", treat anything other than "no" as
3962 non-personal, in accordance with RFC 3834. (Previously it treated
3963 anything starting "auto-" as non-personal.)
3965 TF/01 The control=submission/name=... option had a problem with syntax
3966 errors if the name included a slash character. The /name= option
3967 now slurps the rest of the string, so it can include any characters
3968 but it must come last in the list of options (after /sender_retain
3971 PH/05 Some modifications to the interface to the fake nameserver for the new
3979 TK/01 Added the "success_on_redirect" address verification option. See
3980 NewStuff for rationale and an example.
3982 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3984 PH/02 Patch to exigrep to allow it to work on syslog lines.
3986 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3987 fread() to skip over the body file's header line, because in Cygwin the
3988 header line is locked and is inaccessible.
3990 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3991 co-exist for some time) to make it clear that it is the Exim ID that is
3992 referenced, not the Message-ID: header line.
3994 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3995 string_format() function, because snprintf() does not exist on all
3998 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3999 ${stat: expansion item.
4001 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4002 protocol synchronization error", to keep the pedants happy.
4004 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4005 well as for IRIX systems, when gcc is being used. See the host.c source
4008 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4010 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4013 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4014 transport and to the smtp transport in LMTP mode.
4016 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4018 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4019 run a filter in a subprocess. This could lead to confusion in subsequent
4020 lookups in the parent process. There should also be a search_tidyup() at
4021 the end of the subprocess.
4023 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4024 only if the host matched helo_try_verify_hosts, which caused the
4025 verification to occur when the EHLO/HELO command was issued. The ACL just
4026 tested the remembered result. Now, if a previous verification attempt has
4027 not happened, "verify = helo" does it there and then.
4029 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4031 TK/03 Fix log output including CR from clamd.
4033 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4034 exist provoked a memory error which could cause a segfault.
4036 PH/15 Installed PCRE 6.2
4038 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4040 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4041 of the problem. Specifically, suggested +O2 rather than +O1 for the
4044 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4046 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4047 record, the port was not correctly logged when the outgoing_port log
4048 selector was set (it logged the transort's default port).
4050 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4051 fallback_hosts, and "hosts" in the smtp transport.
4053 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4054 host errors such as "Connection refused".
4056 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4057 authentication with radiusclient 0.4.9:
4059 - Error returned from rc_read_config was caught wrongly
4060 - Username/password not passed on to radius server due to wrong length.
4062 The presumption is that some radiusclient API changes for 4.51/PH/17
4063 were not taken care of correctly. The code is still untested by me (my
4064 Linux distribution still has 0.3.2 of radiusclient), but it was
4065 contributed by a Radius user.
4067 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4068 expanding the "port" option of the smtp transport.
4070 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4071 while reading a MIME header. Thanks to Tom Hughes for a patch.
4073 PH/24 Include config.h inside local_scan.h so that configuration settings are
4076 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4077 that in an ACL for RCPT (for example), you can examine exactly what was
4080 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4081 commands, but it was not correctly comparing the address with the actual
4082 client host address. Thus, it would show the EHLO address in Received:
4083 header lines when this was not necessary.
4085 PH/27 Added the % operator to ${eval:}.
4087 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4088 it should be ignoring failures (because with -C, for example, it has lost
4089 privilege). It wasn't ignoring creation failures other than "already
4092 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4095 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4096 because an input line was too long, either on its own, or by virtue of
4097 too many continuations, the temporary file was not being removed, and the
4098 return code was incorrect.
4100 PH/31 Missing "BOOL" in function definition in filtertest.c.
4102 PH/32 Applied Sieve patches from the maintainer.
4104 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4106 PH/33 Added "verify = not_blind".
4108 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4109 Local/Makefile (with some defaults set). These are used in built scripts
4110 such as exicyclog, but they have never been used in the exim_install
4111 script (though there are many overriding facilities there). I have
4112 arranged that the exim_install script now takes note of these two
4115 PH/35 Installed configuration files for Dragonfly.
4117 PH/36 When a locally submitted message by a trusted user did not contain a
4118 From: header, and the sender address was obtained from -f or from an SMTP
4119 MAIL command, and the trusted user did not use -F to supply a sender
4120 name, $originator_name was incorrectly used when constructing a From:
4121 header. Furthermore, $originator_name was used for submission mode
4122 messages from external hosts without From: headers in a similar way,
4123 which is clearly wrong.
4125 PH/37 Added control=suppress_local_fixups.
4127 PH/38 When log_selector = +received_sender was set, and the addition of the
4128 sender made the log line's construction buffer exactly full, or one byte
4129 less than full, an overflow happened when the terminating "\n" was
4132 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4133 when the result of a list match is failure because a DNS lookup failed.
4135 PH/40 RM_COMMAND is now used in the building process.
4137 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4138 the "build-* directories that it finds.
4140 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4141 address in a domain literal was a prefix of an interface address.
4143 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4144 when verifying a sender address, unless rewrite_headers is false.
4146 PH/44 Wrote a long comment about why errors_to addresses are verified as
4147 recipients, not senders.
4149 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4150 the ratelimit ACL was added.
4152 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4154 PH/46 Added extra information about PostgreSQL errors to the error string.
4156 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4157 avoiding the need to install special zones in a real server. This is
4158 backwards compatible; if it can't find the fake resolver, it drops back.
4159 Thus, both old and new test suites can be run.
4161 TF/02 Added util/ratelimit.pl
4163 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4164 clock is set back in time.
4166 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4167 Candler <B.Candler@pobox.com>.
4169 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4170 OK for addresses that are the result of redirections.
4172 PH/48 A number of further additions for the benefit of the new test suite,
4173 including a fake gethostbyname() that interfaces to the fake DNS resolver
4176 TF/06 The fix for widen_domains has also been applied to qualify_single and
4177 search_parents which are the other dnslookup options that can cause
4180 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4183 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4185 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4186 service" if it encountered an MX record with an empty target hostname.
4187 The message is now "an MX or SRV record indicated no SMTP service".
4189 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4190 if the DNS of the sending site is misconfigured. This is quite a
4191 common situation. This change restores the behaviour of treating a
4192 helo verification defer as a failure.
4194 PH/51 If self=fail was set on a router, the bounce message did not include the
4195 actual error message.
4201 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4203 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4204 command itself ended in error, the underlying message about the transport
4205 filter timeout was being overwritten with the pipe command error. Now the
4206 underlying error message should be appended to the second error message.
4208 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4210 PH/02 Reduce the amount of output that "make" produces by default. Full output
4211 can still be requested.
4213 PH/03 The warning log line about a condition test deferring for a "warn" verb
4214 was being output only once per connection, rather than after each
4215 occurrence (because it was using the same function as for successful
4216 "warn" verbs). This seems wrong, so I have changed it.
4218 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4219 it should not have, which might have caused a crash in the right
4220 circumstances, but probably never did.
4222 PH/04 Installed a modified version of Tony Finch's patch to make submission
4223 mode fix the return path as well as the Sender: header line, and to
4224 add a /name= option so that you can make the user's friendly name appear
4227 TF/03 Added the control = fakedefer ACL modifier.
4229 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4230 Mark Lowes for thorough testing.
4232 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4234 TK/03 Merged latest SRS patch from Miles Wilton.
4236 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4237 with the definition in sysexits.h (which is #included earlier).
4238 Fortunately, Exim does not actually use EX_OK. The code used to try to
4239 preserve the sysexits.h value, by assuming that macro definitions were
4240 scanned for macro replacements. I have been disabused of this notion,
4241 so now the code just undefines EX_OK before #including unistd.h.
4243 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4244 in the smtp transport. When a block could not be written in a single
4245 write() function, the timeout was being re-applied to each part-write.
4246 This seems wrong - if the receiver was accepting one byte at a time it
4247 would take for ever. The timeout is now adjusted when this happens. It
4248 doesn't have to be particularly precise.
4250 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4251 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4253 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4254 without a domain if the check to <postmaster@domain> fails.
4256 SC/01 Eximstats: added -xls and the ability to specify output files
4257 (patch written by Frank Heydlauf).
4259 SC/02 Eximstats: use FileHandles for outputting results.
4261 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4263 SC/04 Eximstats: fixed display of large numbers with -nvr option
4265 SC/05 Eximstats: fixed merging of reports with empty tables.
4267 SC/06 Eximstats: added the -include_original_destination flag
4269 SC/07 Eximstats: removed tabs and trailing whitespace.
4271 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4273 TK/06 MBOX spool code: Add real "From " MBOX separator line
4274 so the .eml file is really in mbox format (even though
4275 most programs do not really care). Patch from Alex Miller.
4277 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4278 The latter is generated from $received_to and is only set if the
4279 message has one envelope recipient. SA can use these headers,
4280 obviously out-of-the-box. Patch from Alex Miller.
4282 PH/08 The ${def test on a variable was returning false if the variable's
4283 value was "0", contrary to what the specification has always said!
4284 The result should be true unless the variable is empty.
4286 PH/09 The syntax error of a character other than { following "${if
4287 def:variable_name" (after optional whitespace) was not being diagnosed.
4288 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4289 accidental colon was present, for example, could give incorrect results.
4291 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4292 result is used (not including appendfile, where other changes are about
4295 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4296 This involved changing a lot of size variables from int to off_t. It
4297 should work with maildirs and everything.
4299 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4300 spamd dying while we are connected to it.
4302 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4305 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4306 function for BDB 4.3.
4308 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4310 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4311 the sources for PCRE have been re-arranged and more files are now
4314 PH/15 The code I had for printing potentially long long variables in PH/11
4315 above was not the best (it lost precision). The length of off_t variables
4316 is now inspected at build time, and an appropriate printing format (%ld
4317 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4318 to be "long long int" or "long int". This is needed for the internal
4319 formatting function string_vformat().
4321 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4322 the configuration file to be ":syslog", then the script "guesses" where
4323 the logs files are, rather than using the compiled in default. In our
4324 case the guess is not the same as the compiled default, so the script
4325 suddenly stopped working when I started to use syslog. The patch checks
4326 to see if log_file_path is "". If so, it attempts to read it from exim
4327 with no configuration file to get the compiled in version, before it
4328 falls back to the previous guessing code."
4330 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4331 implementing BATV in an Exim configuration. See NewStuff for the gory
4334 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4335 Makefile that are specific to HP-UX.
4337 PH/18 If the "use_postmaster" option was set for a recipient callout together
4338 with the "random" option, the postmaster address was used as the MAIL
4339 FROM address for the random test, but not for the subsequent recipient
4340 test. It is now used for both.
4342 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4343 patch removes a few documentation additions to RFC 3028, because the
4344 latest draft now contains them. It adds the new en;ascii-case comparator
4345 and a new error check for 8bit text in MIME parts. Comparator and
4346 require names are now matched exactly. I enabled the subaddress
4347 extension, but it is not well tested yet (read: it works for me)."
4349 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4350 rework some of the code of TK/09 above to avoid the hardwired use of
4351 "%lld" and "long long". Replaced the call to snprintf() with a call to
4354 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4355 records point to non-existent hosts", "retry timeout exceeded", and
4356 "retry time not reached for any host after a long failure period".
4358 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4359 experimental DomainKeys support:
4361 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4362 (2) On an error such as an illegally used "control", the wrong name for
4363 the control was given.
4365 These problems did NOT occur unless DomainKeys support was compiled.
4367 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4369 PH/24 Added ${if match_ip condition.
4371 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4372 databases so that it will be absolutely obvious if a crash occurs in the
4373 DB library. This is a regular occurrence (often caused by mis-matched
4376 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4377 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4378 picked up on a user's system that detects such things. There doesn't seem
4379 to be a gcc warning option for this - only an attribute that has to be
4380 put on the function's prototype. It seems that in Fedora Core 4 they have
4381 set this on a number of new functions. No doubt there will be more in due
4384 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4385 specify a transport. However, if an address that was verified by such a
4386 router was the subject of a callout, Exim crashed because it tried to
4387 read the rcpt_include_affixes from the non-existent transport. Now it
4388 just assumes that the setting of that option is false. This bug was
4389 introduced by 4.51/PH/31.
4391 PH/28 Changed -d+all to exclude +memory, because that information is very
4392 rarely of interest, but it makes the output a lot bigger. People tend to
4393 do -d+all out of habit.
4395 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4396 code in os-type was giving problems when libc.so lives in lib64, like on
4399 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4400 aren't the modern standard, and it seems that some systems' include files
4401 don't always have them. Exim was already checking for some of the newer
4402 ones like T_AAAA, and defining it itself. I've added checks for all the
4403 record types that Exim uses.
4405 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4406 not automatically generating a new one, as it is supposed to. This
4407 prevented TLS from working. If the file did exist, but contained invalid
4408 data, a new version was generated, as expected. It was only the case of a
4409 non-existent file that was broken.
4411 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4412 with a change in libdomainkeys > 0.64.
4414 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4415 from DNS. If the selector record carries the flag, it now has
4416 precedence over the domain-wide flag.
4418 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4420 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4421 the use of a port name that isn't defined in /etc/services) occurred, the
4422 message was deferred as in a normal delivery, and thus remained on the
4423 spool, instead of being failed because of the mua_wrapper setting. This
4424 is now fixed, and I tidied up some of the mua_wrapper messages at the
4427 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4428 the messages in a hash of arrays rather than using individual hashes.
4429 This is a bit cleaner and results in dramatic memory savings, albeit
4430 at a slight CPU cost.
4432 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4433 as requested by Marc Sherman.
4435 SC/10 Eximstats: added histograms for user specified patterns as requested
4438 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4440 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4441 fopen() in the content-scanning modules that did not already have it.
4447 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4448 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4450 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4452 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4454 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4455 to test Sieve filters that use "vacation".
4457 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4458 that changes the way the GnuTLS parameters are stored in the cache file.
4459 The new format can be generated externally. For backward compatibility,
4460 if the data in the cache doesn't make sense, Exim assumes it has read an
4461 old-format file, and it generates new data and writes a new file. This
4462 means that you can't go back to an older release without removing the
4465 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4466 work if there are any delivery delays because "one_time" forces the
4467 parent to be marked "delivered", so its unseen clone is never tried
4468 again. For this reason, Exim now forbids the simultaneous setting of
4471 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4472 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4473 entry if you want to know the details. The fix, however, neglected to
4474 consider the case when local delivery batching is involved. The test for
4475 "previously delivered" was not happening when checking to see if an
4476 address could be batched with a previous (undelivered) one; under
4477 certain circumstances this could lead to multiple deliveries to the same
4480 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4481 in its include files, and this causes problems building Exim.
4483 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4484 header_syntax) but Exim was just ignoring anything given after a slash.
4485 In particular, this caused confusion with an attempt to use "verify =
4486 reverse_host_lookup/defer_ok". An error is now given when options are
4487 supplied for verify items that do not have them. (Maybe reverse_host_
4488 lookup should have a defer_ok option, but that's a different point.)
4490 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4491 defined by RFC 821) to 2048, because there were problems with some AUTH
4492 commands, and RFC 1869 says the size should be increased for extended
4493 SMTP commands that take arguments.
4495 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4498 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4499 "unknown" error; now it says that the functionality isn't in the binary.
4501 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4502 an address' error message when a string expansion fails (syntax or
4503 whatever). Otherwise the password may appear in the log. Following change
4504 PH/42 below, there is no longer a chance of it appearing in a bounce
4507 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4509 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4510 of its addresses was ever tried. (Bugzilla bug #2.)
4512 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4513 the result incorrectly in the debug output. (It correctly added a newline
4514 to what was transported.)
4516 TF/01 Added $received_time.
4518 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4519 commented out examples of how to interface to a virus scanner and to
4520 SpamAssassin. Also added commented examples of av_scanner and
4521 spamd_address settings.
4523 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4524 and controls are allowed in which ACLs. There were a couple of minor
4525 errors. Some of the entries in the conditions table (which is a table of
4526 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4527 negation of where the condition IS allowed.
4529 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4531 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4532 header file does not have a version number, so I've had to invent a new
4533 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4534 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4535 radiusclient), but it was contributed by a Radius user.
4537 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4538 files or directories, for OpenSSL.
4540 PH/19 When an Exim process that is running as root has to create an Exim log
4541 file, it does so in a subprocess that runs as exim:exim so as to get the
4542 ownership right at creation (otherwise, other Exim processes might see
4543 the file with the wrong ownership). There was no test for failure of this
4544 fork() call, which would lead to the process getting stuck as it waited
4545 for a non-existent subprocess. Forks do occasionally fail when resources
4546 run out. I reviewed all the other calls to fork(); they all seem to check
4549 PH/20 When checking for unexpected SMTP input at connect time (before writing
4550 the banner), Exim was not dealing correctly with a non-positive return
4551 from the read() function. If the client had disconnected by this time,
4552 the result was a log entry for a synchronization error with an empty
4553 string after "input=" when read() returned zero. If read() returned -1
4554 (an event I could not check), uninitialized data bytes were printed.
4555 There were reports of junk text (parts of files, etc) appearing after
4558 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4560 PH/22 Added support for macro redefinition, and (re)definition in between
4561 driver and ACL definitions.
4563 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4564 forgetting to use the resulting value; it was using the unexpanded value.
4566 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4567 hadn't been configured. The fix is from Juergen Kreileder, who
4568 understands it better than I do:
4570 "Here's what I see happening with three configured cyrus_sasl
4571 authenticators configured (plain, login, cram-md5):
4573 On startup auth_cyrus_sasl_init() gets called for each of these.
4574 This means three calls to sasl_listmech() without a specified mech_list.
4575 => SASL tests which mechs of all available mechs actually work
4576 => three warnings about OTP not working
4577 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4579 With the patch, sasl_listmech() also gets called three times. But now
4580 SASL's mech_list option is set to the server_mech specified in the the
4581 authenticator. Or in other words, the answer from sasl_listmech()
4582 gets limited to just the mech you're testing for (which is different
4584 => the return list contains just 'plain' or 'login', 'cram-md5' or
4585 nothing depending on the value of ob->server_mech.
4587 I've just tested the patch: Authentication still works fine,
4588 unavailable mechs specified in the exim configuration are still
4589 caught, and the auth.log warnings about OTP are gone."
4591 PH/25 When debugging is enabled, the contents of the command line are added
4592 to the debugging output, even when log_selector=+arguments is not
4595 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4596 answer is "GNU", and only if the return is "GNU/something" is the answer
4599 PH/27 $acl_verify_message is now set immediately after the failure of a
4600 verification in an ACL, and so is available in subsequent modifiers. In
4601 particular, the message can be preserved by coding like this:
4603 warn !verify = sender
4604 set acl_m0 = $acl_verify_message
4606 Previously, $acl_verify_message was set only while expanding "message"
4607 and "log_message" when a very denied access.
4609 PH/28 Modified OS/os.c-Linux with
4611 -#ifndef OS_LOAD_AVERAGE
4612 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4614 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4615 nomenclature these days.)
4617 PH/29 Installed patch from the Sieve maintainer that adds the options
4618 sieve_useraddress and sieve_subaddress to the redirect router.
4620 PH/30 In these circumstances:
4621 . Two addresses routed to the same list of hosts;
4622 . First host does not offer TLS;
4623 . First host accepts first address;
4624 . First host gives temporary error to second address;
4625 . Second host offers TLS and a TLS session is established;
4626 . Second host accepts second address.
4627 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4628 and peerdn, if requested) that were in fact used only for the second
4631 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4632 attention to any local part prefix or suffix that was matched by the
4633 router that accepted the address. It now behaves in the same way as it
4634 does for delivery: the affixes are removed from the local part unless
4635 rcpt_include_affixes is set on the transport.
4637 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4638 timeout during the DATA phase of an incoming message.
4640 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4641 applied a patch sanctioned by the Sieve maintainer.
4643 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4644 the uid or gid is negative. A case of a negative gid caused this to be
4645 noticed. The fix allows for either to be negative.
4647 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4648 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4651 PH/36 The change PH/12 above was broken. Fixed it.
4653 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4654 the grounds that routing the same address twice would always produce the
4655 same answer. This might have been true once, but it is certainly no
4656 longer true now. Routing a child address may depend on the previous
4657 routing that produced that child. Some complicated redirection strategies
4658 went wrong when messages had multiple recipients, and made Exim's
4659 behaviour dependent on the order in which the addresses were given.
4661 I have moved the duplicate checking until after the routing is complete.
4662 Exim scans the addresses that are assigned to local and remote
4663 transports, and removes any duplicates. This means that more work will be
4664 done, as duplicates will always all be routed, but duplicates are
4665 presumably rare, so I don't expect this is of any significance.
4667 For deliveries to pipes, files, and autoreplies, the duplicate checking
4668 still happens during the routing process, since they are not going to be
4671 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4672 It corrects a timeout issue with spamd. This is Ian's comment: "The
4673 background is that sometimes spamd either never reads data from a
4674 connection it has accepted, or it never writes response data. The exiscan
4675 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4676 blindly assumes that writes won't block so it may never time out."
4678 PH/39 Allow G after quota size as well as K and M.
4680 PH/40 The value set for $authenticated_id in an authenticator may not contain
4681 binary zeroes or newlines because the value is written to log lines and
4682 to spool files. There was no check on this. Now the value is run through
4683 the string_printing() function so that such characters are converted to
4684 printable escape sequences.
4686 PH/41 $message_linecount is a new variable that contains the total number of
4687 lines in the message. Compare $body_linecount, which is the count for the
4690 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4691 bounce and delay warning messages, except in certain special cases, which
4694 (a) An SMTP error message from a remote host;
4695 (b) A message specified in a :fail: redirection;
4696 (c) A message specified in a "fail" command in a system filter;
4697 (d) A message specified in a FAIL return from the queryprogram router;
4698 (e) A message specified by the cannot_route_message router option.
4700 In these cases only, Exim does include the error details in bounce and
4701 warning messages. There are also a few cases where bland messages such
4702 as "unrouteable address" or "local delivery error" are given.
4704 PH/43 $value is now also set for the "else" part of a ${run expansion.
4706 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4707 being worked on, but at least Exim now implements the latest version to
4710 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4711 process to complete was treated as a delivery failure, a timeout while
4712 writing the message to the pipe was logged, but erroneously treated as a
4713 successful delivery. Such timeouts include transport filter timeouts. For
4714 consistency with the overall process timeout, these timeouts are now
4715 treated as errors, giving rise to delivery failures by default. However,
4716 there is now a new Boolean option for the pipe transport called
4717 timeout_defer, which, if set TRUE, converts the failures into defers for
4718 both kinds of timeout. A transport filter timeout is now identified in
4721 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4722 systems where "make" and "gmake" are different, calling "gmake" at top
4723 level broke things. I've arranged for the value of $(MAKE) to be passed
4724 from the Makefile to this script so that it can call the same version of
4728 A note about Exim versions 4.44 and 4.50
4729 ----------------------------------------
4731 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4732 changes of various kinds. As a consequence, a big documentation update was
4733 needed. This delayed the release for rather longer than seemed good, especially
4734 in the light of a couple of (minor) security issues. Therefore, the changes
4735 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4736 release. So 4.44 and 4.50 are in effect two different branches that both start
4739 I have left the 4.50 change log unchanged; it contains all the changes since
4740 4.43. The change log for 4.44 is below; many of its items are identical to
4741 those for 4.50. This seems to be the most sensible way to preserve the
4742 historical information.
4748 1. Minor wording change to the doc/README.SIEVE file.
4750 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4751 computation of the current number of files was incorrect.
4753 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4754 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4757 4. Give more explanation in the error message when the command for a transport
4758 filter fails to execute.
4760 5. There are several places where Exim runs a non-Exim command in a
4761 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4762 was being done only for the command run by the queryprogram router. It is
4763 now done for all such subprocesses. The other cases are: ${run, transport
4764 filters, and the commands run by the lmtp and pipe transports.
4766 6. Added CONFIGURE_GROUP build-time option.
4768 7. Some older OS have a limit of 256 on the maximum number of file
4769 descriptors. Exim was using setrlimit() to set 1000 as a large value
4770 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4771 systems. I've change it so that if it can't get 1000, it tries for 256.
4773 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4774 was an oversight, and furthermore, ever since the addition of extra
4775 controls (e.g. 4.43/32), the checks on when to allow different forms of
4776 "control" were broken. There should now be diagnostics for all cases when a
4777 control that does not make sense is encountered.
4779 9. Added the /retain_sender option to "control=submission".
4781 10. $recipients is now available in the predata ACL (oversight).
4783 11. Tidy the search cache before the fork to do a delivery from a message
4784 received from the command line. Otherwise the child will trigger a lookup
4785 failure and thereby defer the delivery if it tries to use (for example) a
4786 cached ldap connection that the parent has called unbind on.
4788 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4789 of $address_data from the recipient verification was clobbered by the
4790 sender verification.
4792 13. The value of address_data from a sender verification is now available in
4793 $sender_address_data in subsequent conditions in the ACL statement.
4795 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4797 15. Added a new option "connect=<time>" to callout options, to set a different
4800 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4801 was its contents. (It was OK if the option was not defined at all.)
4803 17. A "Completed" log line is now written for messages that are removed from
4804 the spool by the -Mrm option.
4806 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4807 information about exactly what failed.
4809 19. Added -dd to debug only the daemon process.
4811 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4812 handles timeouts, both on the server side and network timeouts. Renamed the
4813 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4815 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4816 It is now set to "smtps".
4818 22. $host_address is now set to the target address during the checking of
4819 ignore_target_hosts.
4821 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4822 being passed; this would have caused $sender_host_name to have been used if
4823 matching the list had actually called for a host name (not very likely,
4824 since this list is usually IP addresses). A host name is now passed as
4827 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4828 code that specifies a non-restarting handler (typically sigaction() in
4829 modern systems) in an attempt to fix a rare and obscure crash bug.
4831 25. Narrowed the window for a race in the daemon that could cause it to ignore
4832 SIGCHLD signals. This is not a major problem, because they are used only to
4833 wake it up if nothing else does.
4835 26. A malformed maildirsize file could cause Exim to calculate negative values
4836 for the mailbox size or file count. Odd effects could occur as a result.
4837 The maildirsize information is now recalculated if the size or filecount
4840 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4841 support for a long time. Removed HAVE_SYS_VFS_H.
4843 28. Installed the latest version of exipick from John Jetmore.
4845 29. In an address list, if the pattern was not a regular expression, an empty
4846 subject address (from a bounce message) matched only if the pattern was an
4847 empty string. Non-empty patterns were not even tested. This was the wrong
4848 because it is perfectly reasonable to use an empty address as part of a
4849 database query. An empty address is now tested by patterns that are
4850 lookups. However, all the other forms of pattern expect the subject to
4851 contain a local part and a domain, and therefore, for them, an empty
4852 address still always fails if the pattern is not itself empty.
4854 30. Exim went into a mad DNS loop when attempting to do a callout where the
4855 host was specified on an smtp transport, and looking it up yielded more
4856 than one IP address.
4858 31. Re-factored the code for checking spool and log partition space into a
4859 function that finds that data and another that does the check. The former
4860 is then used to implement four new variables: $spool_space, $log_space,
4861 $spool_inodes, and $log_inodes.
4863 32. The RFC2047 encoding function was originally intended for short strings
4864 such as real names; it was not keeping to the 75-character limit for
4865 encoded words that the RFC imposes. It now respects the limit, and
4866 generates multiple encoded words if necessary. To be on the safe side, I
4867 have increased the buffer size for the ${rfc2047: expansion operator from
4870 33. It is now permitted to omit both strings after an "if" condition; if the
4871 condition is true, the result is "true". As before, when the second string
4872 is omitted, a false condition yields an empty string. This makes it less
4873 cumbersome to write custom ACL and router conditions.
4875 34. Failure to deliver a bounce message always caused it to be frozen, even if
4876 there was an errors_to setting on the router. The errors_to setting is now
4879 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4880 canonical form (fully expanded) before being placed in
4881 $sender_host_address.
4883 36. The table in the code that translates DNS record types into text (T_A to
4884 "A" for instance) was missing entries for NS and CNAME. It is just possible
4885 that this could have caused confusion if both these types were looked up
4886 for the same domain, because the text type is used as part of Exim's
4887 per-process caching. But the chance of anyone hitting this buglet seems
4890 37. The dnsdb lookup has been extended in a number of ways.
4892 (1) There is a new type, "zns", which walks up the domain tree until it
4893 finds some nameserver records. It should be used with care.
4895 (2) There is a new type, "mxh", which is like "mx" except that it returns
4896 just the host names, not the priorities.
4898 (3) It is now possible to give a list of domains (or IP addresses) to be
4899 looked up. The behaviour when one of the lookups defers can be
4900 controlled by a keyword.
4902 (4) It is now possible to specify the separator character for use when
4903 multiple records are returned.
4905 38. The dnslists ACL condition has been extended: it is now possible to supply
4906 a list of IP addresses and/or domains to be looked up in a particular DNS
4909 39. Added log_selector=+queue_time_overall.
4911 40. When running the queue in the test harness, wait just a tad after forking a
4912 delivery process, to get repeatability of debugging output.
4914 41. Include certificate and key file names in error message when GnuTLS fails
4915 to set them up, because the GnuTLS error message doesn't include the name
4916 of the failing file when there is a problem reading it.
4918 42. Allow both -bf and -bF in the same test run.
4920 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4922 44. The "Exiscan patch" is now merged into the mainline Exim source.
4924 45. Sometimes the final signoff response after QUIT could fail to get
4925 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4926 < 0 before doing a fflush(). This bug looks as though it goes back to the
4927 introduction of TLS in release 3.20, but "sometimes" must have been rare
4928 because the tests only now provoked it.
4930 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4931 (this can affect the format of dates).
4933 47. exim_tidydb, when checking for the continued existence of a message for
4934 which it has found a message-specific retry record, was not finding
4935 messages that were in split spool directories. Consequently, it was
4936 deleting retry records that should have stayed in existence.
4938 48. Steve fixed some bugs in eximstats.
4940 49. The SPA authentication driver was not abandoning authentication and moving
4941 on to the next authenticator when an expansion was forced to fail,
4942 contradicting the general specification for all authenticators. Instead it
4943 was generating a temporary error. It now behaves as specified.
4945 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4946 (the order specifies the preference for clients). The order is now AES256,
4947 AES128, 3DES, ARCFOUR128.
4949 51. Small patch to Sieve code - explicitly set From: when generating an
4952 52. Exim crashed if a remote delivery caused a very long error message to be
4953 recorded - for instance if somebody sent an entire SpamAssassin report back
4954 as a large number of 550 error lines. This bug was coincidentally fixed by
4955 increasing the size of one of Exim's internal buffers (big_buffer) that
4956 happened as part of the Exiscan merge. However, to be on the safe side, I
4957 have made the code more robust (and fixed the comments that describe what
4960 53. Now that there can be additional text after "Completed" in log lines (if
4961 the queue_time_overall log selector is set), a one-byte patch to exigrep
4962 was needed to allow it to recognize "Completed" as not the last thing in
4965 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4966 patch that reportedly fixes this has been added. I am not expert enough to
4967 create a test for it. This is what the patch creator wrote:
4969 "I found a little strange behaviour of ldap code when working with
4970 Windows 2003 AD Domain, where users was placed in more than one
4971 Organization Units. When I tried to give exim partial DN, the exit code
4972 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4973 But simultaneously result of request was absolutely normal ldap result,
4974 so I produce this patch..."
4976 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4977 REFERENCE, so I have modified the code to exclude the patch when that macro
4980 55. Some experimental protocols are using DNS PTR records for new purposes. The
4981 keys for these records are domain names, not reversed IP addresses. The
4982 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4983 leaves it alone. Component reversal etc. now happens only for IP addresses.
4986 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4988 57. Double the size of the debug message buffer (to 2048) so that more of very
4989 long debug lines gets shown.
4991 58. The exicyclog utility now does better if the number of log files to keep
4992 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4994 59. Two changes related to the smtp_active_hostname option:
4996 (1) $smtp_active_hostname is now available as a variable.
4997 (2) The default for smtp_banner uses $smtp_active_hostname instead
4998 of $primary_hostname.
5000 60. The host_aton() function is supposed to be passed a string that is known
5001 to be a valid IP address. However, in the case of IPv6 addresses, it was
5002 not checking this. This is a hostage to fortune. Exim now panics and dies
5003 if the condition is not met. A case was found where this could be provoked
5004 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5005 components; fortuitously, this particular loophole had already been fixed
5006 by change 4.50/55 above.
5008 If there are any other similar loopholes, the new check in host_aton()
5009 itself should stop them being exploited. The report I received stated that
5010 data on the command line could provoke the exploit when Exim was running as
5011 exim, but did not say which command line option was involved. All I could
5012 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5013 running as the user.
5016 61. There was a buffer overflow vulnerability in the SPA authentication code
5017 (which came originally from the Samba project). I have added a test to the
5018 spa_base64_to_bits() function which I hope fixes it.
5021 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5022 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5024 63. The daemon start-up calls getloadavg() while still root for those OS that
5025 need the first call to be done as root, but it missed one case: when
5026 deliver_queue_load_max is set with deliver_drop_privilege. This is
5027 necessary for the benefit of the queue runner, because there is no re-exec
5028 when deliver_drop_privilege is set.
5030 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5031 This has been fixed.
5033 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5034 was in use, was not putting the data itself into the right store pool;
5035 consequently, it could be overwritten for a subsequent message in the same
5036 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5039 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5041 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5042 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5043 the function were treating the return as a boolean value, which happened to
5044 work because 0=false and not-0=true, but is not correct code.
5046 68. The host_aton() function was not handling scoped IPv6 addresses (those
5047 with, for example, "%eth0" on the end) correctly.
5049 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5050 negated items (that is, ~something) in unsigned ints. Some compilers
5051 apparently mutter when there is no cast.
5053 70. If an address verification called from an ACL failed, and did not produce a
5054 user-specific message (i.e. there was only a "system" message), nothing was
5055 put in $acl_verify_message. In this situation, it now puts the system
5058 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5059 session; change 4.31/43 added the unwanted input to the log line - except
5060 that it did not do this in the start of session case. It now does.
5062 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5063 This is wrong and can cause the other end to generate a synchronization
5064 error if it is another Exim or anything else that does the synchronization
5065 check. A QUIT command is no longer sent after a timeout.
5067 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5068 during host lookups.
5070 74. The defer_ok option of callout verification was not working if it was used
5071 when verifying addresses in header lines, that is, for this case:
5073 verify = header_sender/callout=defer_ok
5075 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5076 those file descriptors could be used for SMTP connections. If anything
5077 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5078 could be sent to the SMTP client, causing chaos. The daemon now opens
5079 stdin, stdout, and stderr to /dev/null when it puts itself into the
5082 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5083 log by default. The user can override this with suitable Perl magic.
5085 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5086 the log message when discard triggers, was not working for the DATA ACL or
5087 for the non-SMTP ACL.
5089 78. Error message wording change in sieve.c.
5091 79. If smtp_accept_max_per_host was set, the number of connections could be
5092 restricted to fewer than expected, because the daemon was trying to set up
5093 a new connection before checking whether the processes handling previous
5094 connections had finished. The check for completed processes is now done
5095 earlier. On busy systems, this bug wouldn't be noticed because something
5096 else would have woken the daemon, and it would have reaped the completed
5099 80. If a message was submitted locally by a user whose login name contained one
5100 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5101 It caused a spool format error. I have fixed the spool reading code. A
5102 related problem was that the "from" clause in the Received: line became
5103 illegal because of the space(s). It is now covered by ${quote_local_part.
5105 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5108 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5110 83. Patch from Sieve maintainer to fix unterminated string problem in
5111 "vacation" handling.
5113 84. Some minor changes to the Linux configuration files to help with other
5114 OS variants using glibc.
5116 85. One more patch for Sieve to update vacation handling to latest spec.
5119 ----------------------------------------------------
5120 See the note above about the 4.44 and 4.50 releases.
5121 ----------------------------------------------------
5127 1. Change 4.43/35 introduced a bug that caused file counts to be
5128 incorrectly computed when quota_filecount was set in an appendfile
5131 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5132 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5135 3. Give more explanation in the error message when the command for a transport
5136 filter fails to execute.
5138 4. There are several places where Exim runs a non-Exim command in a
5139 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5140 was being done only for the command run by the queryprogram router. It is
5141 now done for all such subprocesses. The other cases are: ${run, transport
5142 filters, and the commands run by the lmtp and pipe transports.
5144 5. Some older OS have a limit of 256 on the maximum number of file
5145 descriptors. Exim was using setrlimit() to set 1000 as a large value
5146 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5147 systems. I've change it so that if it can't get 1000, it tries for 256.
5149 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5150 was an oversight, and furthermore, ever since the addition of extra
5151 controls (e.g. 4.43/32), the checks on when to allow different forms of
5152 "control" were broken. There should now be diagnostics for all cases when a
5153 control that does not make sense is encountered.
5155 7. $recipients is now available in the predata ACL (oversight).
5157 8. Tidy the search cache before the fork to do a delivery from a message
5158 received from the command line. Otherwise the child will trigger a lookup
5159 failure and thereby defer the delivery if it tries to use (for example) a
5160 cached ldap connection that the parent has called unbind on.
5162 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5163 of $address_data from the recipient verification was clobbered by the
5164 sender verification.
5166 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5167 was its contents. (It was OK if the option was not defined at all.)
5169 11. A "Completed" log line is now written for messages that are removed from
5170 the spool by the -Mrm option.
5172 12. $host_address is now set to the target address during the checking of
5173 ignore_target_hosts.
5175 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5176 being passed; this would have caused $sender_host_name to have been used if
5177 matching the list had actually called for a host name (not very likely,
5178 since this list is usually IP addresses). A host name is now passed as
5181 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5182 code that specifies a non-restarting handler (typically sigaction() in
5183 modern systems) in an attempt to fix a rare and obscure crash bug.
5185 15. Narrowed the window for a race in the daemon that could cause it to ignore
5186 SIGCHLD signals. This is not a major problem, because they are used only to
5187 wake it up if nothing else does.
5189 16. A malformed maildirsize file could cause Exim to calculate negative values
5190 for the mailbox size or file count. Odd effects could occur as a result.
5191 The maildirsize information is now recalculated if the size or filecount
5194 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5195 support for a long time. Removed HAVE_SYS_VFS_H.
5197 18. Updated exipick to current release from John Jetmore.
5199 19. Allow an empty sender to be matched against a lookup in an address list.
5200 Previously the only cases considered were a regular expression, or an
5203 20. Exim went into a mad DNS lookup loop when doing a callout where the
5204 host was specified on the transport, if the DNS lookup yielded more than
5207 21. The RFC2047 encoding function was originally intended for short strings
5208 such as real names; it was not keeping to the 75-character limit for
5209 encoded words that the RFC imposes. It now respects the limit, and
5210 generates multiple encoded words if necessary. To be on the safe side, I
5211 have increased the buffer size for the ${rfc2047: expansion operator from
5214 22. Failure to deliver a bounce message always caused it to be frozen, even if
5215 there was an errors_to setting on the router. The errors_to setting is now
5218 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5219 canonical form (fully expanded) before being placed in
5220 $sender_host_address.
5222 24. Updated eximstats to version 1.33
5224 25. Include certificate and key file names in error message when GnuTLS fails
5225 to set them up, because the GnuTLS error message doesn't include the name
5226 of the failing file when there is a problem reading it.
5228 26. Expand error message when OpenSSL has problems setting up cert/key files.
5231 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5232 (this can affect the format of dates).
5234 28. exim_tidydb, when checking for the continued existence of a message for
5235 which it has found a message-specific retry record, was not finding
5236 messages that were in split spool directories. Consequently, it was
5237 deleting retry records that should have stayed in existence.
5239 29. eximstats updated to version 1.35
5240 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5241 1.35 - bugfix such that pie charts by volume are generated correctly
5243 30. The SPA authentication driver was not abandoning authentication and moving
5244 on to the next authenticator when an expansion was forced to fail,
5245 contradicting the general specification for all authenticators. Instead it
5246 was generating a temporary error. It now behaves as specified.
5248 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5249 (the order specifies the preference for clients). The order is now AES256,
5250 AES128, 3DES, ARCFOUR128.
5252 31. Small patch to Sieve code - explicitly set From: when generating an
5255 32. Exim crashed if a remote delivery caused a very long error message to be
5256 recorded - for instance if somebody sent an entire SpamAssassin report back
5257 as a large number of 550 error lines. This bug was coincidentally fixed by
5258 increasing the size of one of Exim's internal buffers (big_buffer) that
5259 happened as part of the Exiscan merge. However, to be on the safe side, I
5260 have made the code more robust (and fixed the comments that describe what
5263 33. Some experimental protocols are using DNS PTR records for new purposes. The
5264 keys for these records are domain names, not reversed IP addresses. The
5265 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5266 leaves it alone. Component reversal etc. now happens only for IP addresses.
5269 34. The host_aton() function is supposed to be passed a string that is known
5270 to be a valid IP address. However, in the case of IPv6 addresses, it was
5271 not checking this. This is a hostage to fortune. Exim now panics and dies
5272 if the condition is not met. A case was found where this could be provoked
5273 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5274 components; fortuitously, this particular loophole had already been fixed
5275 by change 4.50/55 or 4.44/33 above.
5277 If there are any other similar loopholes, the new check in host_aton()
5278 itself should stop them being exploited. The report I received stated that
5279 data on the command line could provoke the exploit when Exim was running as
5280 exim, but did not say which command line option was involved. All I could
5281 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5282 running as the user.
5285 35. There was a buffer overflow vulnerability in the SPA authentication code
5286 (which came originally from the Samba project). I have added a test to the
5287 spa_base64_to_bits() function which I hope fixes it.
5290 36. The daemon start-up calls getloadavg() while still root for those OS that
5291 need the first call to be done as root, but it missed one case: when
5292 deliver_queue_load_max is set with deliver_drop_privilege. This is
5293 necessary for the benefit of the queue runner, because there is no re-exec
5294 when deliver_drop_privilege is set.
5296 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5297 was in use, was not putting the data itself into the right store pool;
5298 consequently, it could be overwritten for a subsequent message in the same
5299 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5302 38. Sometimes the final signoff response after QUIT could fail to get
5303 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5304 < 0 before doing a fflush(). This bug looks as though it goes back to the
5305 introduction of TLS in release 3.20, but "sometimes" must have been rare
5306 because the tests only now provoked it.
5312 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5313 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5314 Now it returns an integer. A number of calls were still expecting a T/F
5315 return. Fortuitously, in all cases, the tests worked in OK situations,
5316 which is the norm. However, things would have gone wrong on any write
5317 failures on the smtp file descriptor. This function is used when sending
5318 messages over SMTP and also when doing verify callouts.
5320 2. When Exim is called to do synchronous delivery of a locally submitted
5321 message (the -odf or -odi options), it no longer closes stderr before doing
5324 3. Implemented the mua_wrapper option.
5326 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5328 5. Implemented the functions header_remove(), header_testname(),
5329 header_add_at_position(), and receive_remove_recipient(), and exported them
5332 6. If an ACL "warn" statement specified the addition of headers, Exim already
5333 inserted X-ACL-Warn: at the start if there was no header name. However, it
5334 was not making this test for the second and subsequent header lines if
5335 there were newlines in the string. This meant that an invalid header could
5336 be inserted if Exim was badly configured.
5338 7. Allow an ACL "warn" statement to add header lines at the start or after all
5339 the Received: headers, as well as at the end.
5341 8. Added the rcpt_4xx retry error code.
5343 9. Added postmaster_mailfrom=xxx to callout verification option.
5345 10. Added mailfrom=xxxx to the callout verification option, for verify=
5348 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5349 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5351 12. Inserted some casts to stop certain compilers warning when using pointer
5352 differences as field lengths or precisions in printf-type calls (mostly
5353 affecting debugging statements).
5355 13. Added optional readline() support for -be (dynamically loaded).
5357 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5358 same clock tick as a message's arrival, so that its received time was the
5359 same as the "first fail" time on the retry record, and that message
5360 remained on the queue past the ultimate address timeout, every queue runner
5361 would try a delivery (because it was past the ultimate address timeout) but
5362 after another failure, the ultimate address timeout, which should have then
5363 bounced the address, did not kick in. This was a "< instead of <=" error;
5364 in most cases the first failure would have been in the next clock tick
5365 after the received time, and all would be well.
5367 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5368 being recognized when the domain list was tested by the match_domain
5369 condition in an expansion string.
5371 16. Added the ${str2b64: operator.
5373 17. Exim was always calling setrlimit() to set a large limit for the number of
5374 processes, without checking whether the existing limit was already
5375 adequate. (It did check for the limit on file descriptors.) Furthermore,
5376 errors from getrlimit() and setrlimit() were being ignored. Now they are
5377 logged to the main and panic logs, but Exim does carry on, to try to do its
5378 job under whatever limits there are.
5380 18. Imported PCRE 5.0.
5382 19. Trivial typo in log message " temporarily refused connection" (the leading
5385 20. If the log selector return_path_on_delivery was set and an address was
5386 redirected to /dev/null, the delivery process crashed because it assumed
5387 that a return path would always be set for a "successful" delivery. In this
5388 case, the whole delivery is bypassed as an optimization, and therefore no
5391 21. Internal re-arrangement: the function for sending a challenge and reading
5392 a response while authentication was assuming a zero-terminated challenge
5393 string. It's now changed to take a pointer and a length, to allow for
5394 binary data in such strings.
5396 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5398 23. Exim was not respecting finduser_retries when seeking the login of the
5399 uid under which it was called; it was always trying 10 times. (The default
5400 setting of finduser_retries is zero.) Also, it was sleeping after the final
5401 failure, which is pointless.
5403 24. Implemented tls_on_connect_ports.
5405 25. Implemented acl_smtp_predata.
5407 26. If the domain in control=submission is set empty, Exim assumes that the
5408 authenticated id is a complete email address when it generates From: or
5409 Sender: header lines.
5411 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5412 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5413 chown and chgrp in /bin and hostname in /usr/bin.
5415 28. Exim was keeping the "process log" file open after each use, just as it
5416 does for the main log. This opens the possibility of it remaining open for
5417 long periods when the USR1 signal hits a daemon. Occasional processlog
5418 errors were reported, that could have been caused by this. Anyway, it seems
5419 much more sensible not to leave this file open at all, so that is what now
5422 29. The long-running daemon process does not normally write to the log once it
5423 has entered its main loop, and it closes the log before doing so. This is
5424 so that log files can straightforwardly be renamed and moved. However,
5425 there are a couple of unusual error situations where the daemon does write
5426 log entries, and I had neglected to close the log afterwards.
5428 30. The text of an SMTP error response that was received during a remote
5429 delivery was being truncated at 512 bytes. This is too short for some of
5430 the long messages that one sometimes sees. I've increased the limit to
5433 31. It is now possible to make retry rules that apply only when a message has a
5434 specific sender, in particular, an empty sender.
5436 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5437 it possible to be selective about when SMTP synchronization is enforced.
5439 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5441 32. Implemented hosts_connection_nolog.
5443 33. Added an ACL for QUIT.
5445 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5448 35. Added mailbox_size and mailbox_filecount to appendfile.
5450 36. Added control = no_multiline_responses to ACLs.
5452 37. There was a bug in the logic of the code that waits for the clock to tick
5453 in the case where the clock went backwards by a substantial amount such
5454 that the microsecond fraction of "now" was more than the microsecond
5455 fraction of "then" (but the whole seconds number was less).
5457 38. Added support for the libradius Radius client library this is found on
5458 FreeBSD (previously only the radiusclient library was supported).
5464 1. When certain lookups returned multiple values in the form name=value, the
5465 quoting of the values was not always being done properly. Specifically:
5466 (a) If the value started with a double quote, but contained no whitespace,
5468 (b) If the value contained whitespace other than a space character (i.e.
5469 tabs or newlines or carriage returns) it was not quoted.
5470 This fix has been applied to the mysql and pgsql lookups by writing a
5471 separate quoting function and calling it from the lookup code. The fix
5472 should probably also be applied to nisplus, ibase and oracle lookups, but
5473 since I cannot test any of those, I have not disturbed their existing code.
5475 2. A hit in the callout cache for a specific address caused a log line with no
5476 reason for rejecting RCPT. Now it says "Previous (cached) callout
5477 verification failure".
5479 3. There was an off-by-one bug in the queryprogram router. An over-long
5480 return line was truncated at 256 instead of 255 characters, thereby
5481 overflowing its buffer with the terminating zero. As well as fixing this, I
5482 have increased the buffer size to 1024 (and made a note to document this).
5484 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5485 when Exim is waiting for an SMTP response from a remote server, Exim
5486 restarts its select() call on the socket, thereby resetting its timeout.
5487 This is not a problem when such interrupts are rare. Somebody set up a cron
5488 job to run exiwhat every 2 minutes, which is less than the normal select()
5489 timeout (5 or 10 minutes). This meant that the select() timeout never
5490 kicked in because it was always reset. I have fixed this by comparing the
5491 time when an interrupt arrives with the time at the start of the first call
5492 to select(). If more time than the timeout has elapsed, the interrupt is
5493 treated as a timeout.
5495 5. Some internal re-factoring in preparation for the addition of Sieve
5496 extensions (by MH). In particular, the "personal" test is moved to a
5497 separate function, and given an option for scanning Cc: and Bcc: (which is
5498 not set for Exim filters).
5500 6. When Exim created an email address using the login of the caller as the
5501 local part (e.g. when creating a From: or Sender: header line), it was not
5502 quoting the local part when it contained special characters such as @.
5504 7. Installed new OpenBSD configuration files.
5506 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5507 try to make them clearer.
5509 9. Callout options, other than the timeout value, were being ignored when
5510 verifying sender addresses in header lines. For example, when using
5512 verify = header_sender/callout=no_cache
5514 the cache was (incorrectly) being used.
5516 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5517 only the Cygwin environment.
5519 11. When return_path_on_delivery was set as a log selector, if different remote
5520 addresses in the same message used different return paths and parallel
5521 remote delivery occurred, the wrong values would sometimes be logged.
5522 (Whenever a remote delivery process finished, the return path value from
5523 the most recently started remote delivery process was logged.)
5525 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5526 lines when AUTH and/or TLS are in use. This is the "received protocol"
5527 field. Exim used to use "asmtp" for authenticated SMTP, without any
5528 indication (in the protocol name) for TLS use. Now it follows the RFC and
5529 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5530 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5531 names appear in log lines as well as in Received: header lines.
5533 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5534 extensions, and comparison tests, and to fix some bugs.
5536 14. Changes to the "personal" filter test:
5538 (1) The test was buggy in that it was just doing the equivalent of
5539 "contains" tests on header lines. For example, if a user's address was
5540 anne@some.where, the "personal" test would incorrectly be true for
5542 To: susanne@some.where
5544 This test is now done by extracting each address from the header in turn,
5545 and checking the entire address. Other tests that are part of "personal"
5546 are now done using regular expressions (for example, to check local parts
5547 of addresses in From: header lines).
5549 (2) The list of non-personal local parts in From: addresses has been
5550 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5551 taken from the Sieve specification recommendations.
5553 (3) If the message contains any header line starting with "List-" it is
5554 treated as non-personal.
5556 (4) The test for "circular" in the Subject: header line has been removed
5557 because it now seems ill-conceived.
5559 15. Minor typos in src/EDITME comments corrected.
5561 16. Installed latest exipick from John Jetmore.
5563 17. If headers_add on a router specified a text string that was too long for
5564 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5565 of string_sprintf() is now avoided.
5567 18. $message_body_size was not set (it was always zero) when running the DATA
5568 ACL and the local_scan() function.
5570 19. For the "mail" command in an Exim filter, no default was being set for
5571 the once_repeat time, causing a random time value to be used if "once" was
5572 specified. (If the value happened to be <= 0, no repeat happened.) The
5573 default is now 0s, meaning "never repeat". The "vacation" command was OK
5574 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5575 (I found it when inspecting the code).
5577 20. There is now an overall timeout for performing a callout verification. It
5578 defaults to 4 times the callout timeout, which applies to individual SMTP
5579 commands during the callout. The overall timeout applies when there is more
5580 than one host that can be tried. The timeout is checked before trying the
5581 next host. This prevents very long delays if there are a large number of
5582 hosts and all are timing out (e.g. when the network connections are timing
5583 out). The value of the overall timeout can be changed by specifying an
5584 additional sub-option for "callout", called "maxwait". For example:
5586 verify = sender/callout=5s,maxwait=20s
5588 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5589 to the end before writing, but this should make it even safer).
5591 22. Exim was forgetting that it had advertised PIPELINING for the second and
5592 subsequent messages on an SMTP connection. It was also not resetting its
5593 memory on STARTTLS and an internal HELO.
5595 23. When Exim logs an SMTP synchronization error within a session, it now
5596 records whether PIPELINING has been advertised or not.
5598 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5599 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5600 rather than long int.
5602 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5604 26. Added the never_mail option to autoreply.
5610 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5611 crash if the getsockname() call failed; this can happen if a connection is
5612 closed very soon after it is established. The problem was simply in the
5613 order in which certain operations were done, causing Exim to try to write
5614 to the SMTP stream before it had set up the file descriptor. The bug has
5615 been fixed by making things happen in the correct order.
5621 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5622 before the connection was closed, thus losing the rejection response.
5624 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5625 some early Solaris releases, but causes trouble in current releases where
5626 socklen_t is defined.
5628 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5631 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5634 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5635 that releasing the top of it at the end releases what was used for sub-
5636 expansions (unless the block got too big). However, discard this block if
5637 the first thing is a variable or header, so that we can use its block when
5638 it is dynamic (useful for very large $message_headers, for example).
5640 6. Lookups now cache *every* query, not just the most recent. A new, separate
5641 store pool is used for this. It can be recovered when all lookup caches are
5642 flushed. Lookups now release memory at the end of their result strings.
5643 This has involved some general refactoring of the lookup sources.
5645 7. Some code has been added to the store_xxx() functions to reduce the amount
5646 of flapping under certain conditions.
5648 8. log_incoming_interface used to affect only the <= reception log lines. Now
5649 it causes the local interface and port to be added to several more SMTP log
5650 lines, for example "SMTP connection from", and rejection lines.
5652 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5654 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5656 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5657 could be overwritten at the end of the current message (or the start of a
5658 new message if it was set in a HELO ACL). The value is now preserved for
5659 the duration of the SMTP connection.
5661 12. If a transport had a headers_rewrite setting, and a matching header line
5662 contained an unqualified address, that address was qualified, even if it
5663 did not match any rewriting rules. The underlying bug was that the values
5664 of the flags that permit the existence of unqualified sender and recipient
5665 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5666 non-local messages, and by -bnq for local messages) were not being
5667 preserved with the message after it was received.
5669 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5670 "next input=" as part of the text comprising the host identity instead of
5671 the correct text. The code was using the same buffer for two different
5672 strings. However, depending on which order the printing function evaluated
5673 its arguments, the bug did not always show up. Under Linux, for example, my
5674 test suite worked just fine.
5676 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5677 doesn't work with some older versions of Perl. It has been changed to "my",
5678 which in any case is probably the better facility to use.
5680 15. A really picky compiler found some instances of statements for creating
5681 error messages that either had too many or two few arguments for the format
5684 16. The size of the buffer for calls to the DNS resolver has been increased
5685 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5686 for addresses that have a lot of PTR records. This alleviates a problem; it
5687 does not fully solve it.
5689 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5690 buffer now truncates the list and logs the incident, which is the same
5691 action as happens when Exim is looking up a host name and its aliases.
5692 Previously in this situation something unpredictable would happen;
5693 sometimes it was "internal error: store_reset failed".
5695 18. If a server dropped the connection unexpectedly when an Exim client was
5696 using GnuTLS and trying to read a response, the client delivery process
5697 crashed while trying to generate an error log message.
5699 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5700 string, for example:
5702 warn message = H1: something\nH2: something
5704 the text was added as a single header line from Exim's point of view
5705 though it ended up OK in the delivered message. However, searching for the
5706 second and subsequent header lines using $h_h2: did not work. This has been
5707 fixed. Similarly, if a system filter added multiple headers in this way,
5708 the routers could not see them.
5710 20. Expanded the error message when iplsearch is called with an invalid key to
5711 suggest using net-iplsearch in a host list.
5713 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5714 ACLs are no longer actually imposed (and a message to that effect is
5717 22. If a "gecos" field in a passwd entry contained escaped characters, in
5718 particular, if it contained a \" sequence, Exim got it wrong when building
5719 a From: or a Sender: header from that name. A second bug also caused
5720 incorrect handling when an unquoted " was present following a character
5721 that needed quoting.
5723 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5724 was not being matched caselessly.
5726 24. Arranged for all hyphens in the exim.8 source to be escaped with
5729 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5730 properly. Recipient callout cache records were still being keyed to include
5731 the sender, even when use_sender was set false. This led to far more
5732 callouts that were necessary. The sender is no longer included in the key
5733 when use_sender is false.
5735 26. Added "control = submission" modifier to ACLs.
5737 27. Added the ${base62d: operator to decode base 62 numbers.
5739 28. dnsdb lookups can now access SRV records.
5741 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5742 the configuration file.
5744 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5745 (-v) mode. This makes the output for a verbose queue run more intelligible.
5747 31. Added a use_postmaster feature to recipient callouts.
5749 32. Added the $body_zerocount variable, containing the number of binary zero
5750 bytes in the message body.
5752 33. The time of last modification of the "new" subdirectory is now used as the
5753 "mailbox time last read" when there is a quota error for a maildir
5756 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5758 35. Added +ignore_unknown as a special item in host lists.
5760 36. Code for decoding IPv6 addresses in host lists is now included, even if
5761 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5762 address was recognized as an IP address, but was then not correctly decoded
5763 into binary, causing unexpected and incorrect effects when compared with
5770 1. Very minor rewording of debugging text in manualroute to say "list of
5771 hosts" instead of "hostlist".
5773 2. If verify=header_syntax was set, and a header line with an unqualified
5774 address (no domain) and a large number of spaces between the end of the
5775 name and the colon was received, the reception process suffered a buffer
5776 overflow, and (when I tested it) crashed. This was caused by some obsolete
5777 code that should have been removed. The fix is to remove it!
5779 3. When running in the test harness, delay a bit after writing a bounce
5780 message to get a bit more predictability in the log output.
5782 4. Added a call to search_tidyup() just before forking a reception process. In
5783 theory, someone could use a lookup in the expansion of smtp_accept_max_
5784 per_host which, without the tidyup, could leave open a database connection.
5786 5. Added the variables $recipient_data and $sender_data which get set from a
5787 lookup success in an ACL "recipients" or "senders" condition, or a router
5788 "senders" option, similar to $domain_data and $local_part_data.
5790 6. Moved the writing of debug_print from before to after the "senders" test
5793 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5794 problems for message scanning, either using a data ACL, or using
5795 local_scan() because the Received: header was not generated till after they
5796 were called (in order to set the time as the time of reception completion).
5797 I have revised the way this works. The header is now generated after the
5798 body is received, but before the ACL or local_scan() are called. After they
5799 are run, the timestamp in the header is updated.
5805 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5806 before starting a queue runner without re-exec. This happened only when
5807 deliver_drop_privilege was set or when the Exim user was set to root. The
5808 effect of the bug was that timeouts during subsequent deliveries caused
5809 crashes instead of being properly handled. The handler is now left at its
5810 default (and expected) setting.
5812 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5813 message, again when deliver_drop_privilege is set or Exim is run as root.
5814 The bug described in (1) was not present in this case, but the tidying up
5815 of the other signals was missing. I have made the two cases consistent.
5817 3. The ignore_target_hosts setting on a manualroute router was being ignored
5818 for hosts that were looked up using the /MX notation.
5820 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5823 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5824 operated on the sender address. After changing the $sender_address to <>
5825 for the sender address verify, Exim was re-instated it as the original
5826 (before rewriting) address, but remembering that it had rewritten it, so it
5827 wasn't rewriting it again. This bug also had the effect of breaking the
5828 sender address verification caching when the sender address was rewritten.
5830 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5831 This has been changed so that if the ip literal address matches
5832 ignore_target_hosts, the router declines.
5834 7. Added expansion conditions match_domain, match_address, and match_local_
5835 part (NOT match_host).
5837 8. The placeholder for the Received: header didn't have a length field set.
5839 9. Added code to Exim itself and to exim_lock to test for a specific race
5840 condition that could lead to file corruption when using MBX delivery. The
5841 issue is with the lockfile that is created in /tmp. If this file is removed
5842 after a process has opened it but before that process has acquired a lock,
5843 there is the potential for a second process to recreate the file and also
5844 acquire a lock. This could lead to two Exim processes writing to the file
5845 at the same time. The added code performs the same test as UW imapd; it
5846 checks after acquiring the lock that its file descriptor still refers to
5847 the same named file.
5849 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5850 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5853 11. Added the smtp_active_hostname option. If used, this will typically be made
5854 to depend on the incoming interface address. Because $interface_address is
5855 not set up until the daemon has forked a reception process, error responses
5856 that can happen earlier (such as "too many connections") no longer contain
5859 12. If an expansion in a condition on a "warn" statement fails because a lookup
5860 defers, the "warn" statement is abandoned, and the next ACL statement is
5861 processed. Previously this caused the whole ACL to be aborted.
5863 13. Added the iplsearch lookup type.
5865 14. Added ident_timeout as a log selector.
5867 15. Added tls_certificate_verified as a log selector.
5869 16. Added a global option tls_require_ciphers (compare the smtp transport
5870 option of the same name). This controls incoming TLS connections.
5872 17. I finally figured out how to make tls_require_ciphers do a similar thing
5873 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5874 before starting the TLS session.
5876 18. Tabs are now shown as \t in -bP output.
5878 19. If the log selector return_path_on_delivery was set, Exim crashed when
5879 bouncing a message because it had too many Received: header lines.
5881 20. If two routers both had headers_remove settings, and the first one included
5882 a superfluous trailing colon, the final name in the first list and the
5883 first name in the second list were incorrectly joined into one item (with a
5884 colon in the middle).
5890 1. Added -C and -D options to the exinext utility, mainly to make it easier
5891 to include in the automated testing, but these could be helpful when
5892 multiple configurations are in use.
5894 2. The exinext utility was not formatting the output nicely when there was
5895 an alternate port involved in the retry record key, nor when there was a
5896 message id as well (for retries that were specific to a specific message
5897 and a specific host). It was also confused by IPv6 addresses, because of
5898 the additional colons they contain. I have fixed the IPv4 problem, and
5899 patched it up to do a reasonable job for IPv6.
5901 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5902 delivery, the log line now contains "pipelined" if PIPELINING was used.
5904 4. An SMTP transport process used to panic and die if the bind() call to set
5905 an explicit outgoing interface failed. This has been changed; it is now
5906 treated in the same way as a connect() failure.
5908 5. A reference to $sender_host_name in the part of a conditional expansion
5909 that was being skipped was still causing a DNS lookup. This no longer
5912 6. The def: expansion condition was not recognizing references to header lines
5913 that used bh_ and bheader_.
5915 7. Added the _cache feature to named lists.
5917 8. The code for checking quota_filecount in the appendfile transport was
5918 allowing one more file than it should have been.
5920 9. For compatibility with Sendmail, the command line option
5928 and sets the incoming protocol and host name (for trusted callers). The
5929 host name and its colon can be omitted when only the protocol is to be set.
5930 Note the Exim already has two private options, -pd and -ps, that refer to
5931 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5932 "s", but I don't think that's a major issue.
5934 10. A number of refactoring changes to the code, none of which should affect
5937 (a) The number of logging options was getting close to filling up the
5938 32-bit word that was used as a bit map. I have split them into two classes:
5939 those that are passed in the argument to log_write(), and those that are
5940 only ever tested independently outside of that function. These are now in
5941 separate 32-bit words, so there is plenty of room for expansion again.
5942 There is no change in the user interface or the logging behaviour.
5944 (b) When building, for example, log lines, the code previously used a
5945 macro that called string_cat() twice, in order to add two strings. This is
5946 not really sufficiently general. Furthermore, there was one instance where
5947 it was actually wrong because one of the argument was used twice, and in
5948 one call a function was used. (As it happened, calling the function twice
5949 did not affect the overall behaviour.) The macro has been replaced by a
5950 function that can join an arbitrary number of extra strings onto a growing
5953 (c) The code for expansion conditions now uses a table and a binary chop
5954 instead of a serial search (which was left over from when there were very
5955 few conditions). Also, it now recognizes conditions like "pam" even when
5956 the relevant support is not compiled in: a suitably worded error message is
5957 given if an attempt is made to use such a condition.
5959 11. Added ${time_interval:xxxxx}.
5961 12. A bug was causing one of the ddress fields not to be passed back correctly
5962 from remote delivery subprocesses. The field in question was not being
5963 subsequently used, so this caused to problems in practice.
5965 13. Added new log selectors queue_time and deliver_time.
5967 14. Might have fixed a bug in maildirsizefile handling that threw up
5968 "unexpected character" debug warnings, and recalculated the data
5969 unnecessarily. In any case, I expanded the warning message to give more
5972 15. Added the message "Restricted characters in address" to the statements in
5973 the default ACL that block characters like @ and % in local parts.
5975 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5976 Three changes have been made:
5978 (a) There was a serious bug; a negative response to MAIL caused the whole
5979 recipient domain to be cached as invalid, thereby blocking all messages
5980 to all local parts at the same domain, from all senders. This bug has
5981 been fixed. The domain is no longer cached after a negative response to
5982 MAIL if the sender used is not empty.
5984 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5987 (c) A new callout option, "use_sender" has been added for people who want
5988 the modified behaviour.
5994 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5997 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5998 indeed breaks things for older releases.
6000 3. Added additional logging to the case where there is a problem reading data
6001 from a filter that is running in a subprocess using a pipe, in order to
6002 try to track down a specific problem.
6004 4. Testing facility fudge: when running in the test harness and attempting
6005 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6006 getting "No route to host". Convert this to a timeout.
6008 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6011 6. Some OS don't have socklen_t but use size_t instead. This affects the
6012 fifth argument of getsockopt() amongst other things. This is now
6013 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6014 can be set for individual OS. I have set it for SunOS5, OSF1, and
6015 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6016 some earlier ones do not.
6018 7. Change 4.30/15 was not doing the test caselessly.
6020 8. The standard form for an IPv6 address literal was being rejected by address
6021 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6022 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6023 this, as well as the form without the "IPv6" on the front (but only when
6024 address literals are enabled, of course).
6026 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6028 10. Exim crashed if a message with an empty sender address specified by -f
6029 encountered a router with an errors_to setting. This could be provoked only
6030 by a command such as
6034 where an empty string was supplied; "<>" did not hit this bug.
6036 11. Installed PCRE release 4.5.
6038 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6039 remained set. It is now erased.
6041 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6042 times from message ids (which are base 36 rather than the normal 62).
6044 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6045 were being counted as actual protocol errors, and logged if the log
6046 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6047 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6048 and DATA following a set of rejected RCPTs do not count as protocol errors.
6049 In other words, Exim assumes they were pipelined, though this may not
6050 actually be the case. Of course, in all cases the client gets an
6051 appropriate error code.
6053 15. If a lookup fails in an ACL condition, a message about the failure may
6054 be available; it is used if testing the ACL cannot continue, because most
6055 such messages specify what the cause of the deferral is. However, some
6056 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6057 that caused an old message to be retained and used if a later statement
6058 caused a defer, replacing the real cause of the deferral.
6060 16. If an IP address had so many PTR records that the DNS lookup buffer
6061 was not large enough to hold them, Exim could crash while trying to process
6062 the truncated data. It now detects and logs this case.
6064 17. Further to 4.21/58, another change has been made: if (and only if) the
6065 first line of a message (the first header line) ends with CRLF, a bare LF
6066 in a subsequent header line has a space inserted after it, so as not to
6067 terminate the header.
6069 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6070 unnecessarily, used atoi() instead of strtol(), and didn't check the
6071 termination when getting file sizes from file names by regex.
6073 19. Completely re-implemented the support for maildirsize files, in the light
6074 of a number of problems with the previous contributed implementation
6075 (4.30/29). In particular:
6077 . If the quota is zero, the maildirsize file is maintained, but no quota is
6080 . If the maildir directory does not exist, it is created before any attempt
6081 to write a maildirsize file.
6083 . The quota value in the file is just a cache; if the quota is changed in
6084 the transport, the new value overrides.
6086 . A regular expression is available for excluding directories from the
6089 20. The autoreply transport checks the characters in options that define the
6090 message's headers; it allows continued headers, but it was checking with
6091 isspace() after an embedded newline instead of explicitly looking for a
6094 21. If all the "regular" hosts to which an address was routed had passed their
6095 expiry times, and had not reached their retry times, the address was
6096 bounced, even if fallback hosts were defined. Now Exim should go on to try
6099 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6100 equivalent code in the SMTP transport. Some hosts send humungous responses
6101 to HELO/EHLO, more than 1024 it seems.
6103 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6104 gives compiler warnings in some environments. I've now done it "properly",
6107 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6108 (because of problems with the built-in one) was declared to return uschar *
6109 instead of char *, causing compiler failure.
6111 25. Fixed a file descriptor leak when processing alias/forward files.
6113 26. Fixed a minor format string issue in dbfn.c.
6115 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6117 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6118 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6121 29. When a sender address is verified, it is cached, to save repeating the test
6122 when there is more than one recipient in a message. However, when the
6123 verification involves a callout, it is possible for different callout
6124 options to be set for different recipients. It is too complicated to keep
6125 track of this in the cache, so now Exim always runs a verification when a
6126 callout is required, relying on the callout cache for the optimization.
6127 The overhead is duplication of the address routing, but this should not be
6130 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6131 to be verified with callout=postmaster, and the main callout worked but the
6132 postmaster check failed, the verification correctly failed. However, if a
6133 subsequent RCPT command asked for sender verification *without* the
6134 postmaster check, incorrect caching caused this verification also to fail,
6137 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6138 it was not caching the DNS options (qualify_single, search_parents) that
6139 were used when the lookup failed. A subsequent lookup with different
6140 options therefore always gave the same answer, though there were cases
6141 where it should not have. (Example: a "domains = !$mx_any" option on a
6142 dnslookup router: the "domains" option is always processed without any
6143 widening, but the router might have qualify_single set.) Now Exim uses the
6144 cached value only when the same options are set.
6146 32. Added John Jetmore's "exipick" utility to the distribution.
6148 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6149 than a timeout (e.g. a certificate is required, and is not provided), an
6150 Exim server now closes the connection immediately. Previously it waited for
6151 the client to close - but if the client is SSL, it seems that they each
6152 wait for each other, leading to a delay before one of them times out.
6154 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6155 maintained 0.8.x compatibility because I don't think many are using it, and
6156 it is clearly obsolete.
6158 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6161 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6162 client certificate was expired. A simple patch fixes this, though I don't
6163 understand the full logic of why the verify callback is called multiple
6166 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6167 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6168 which causes problems with some clients (such as the Certicom SSL Plus
6169 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6170 disables the coutermeasure allowing Eudora to connect."
6172 38. Exim was not checking that a write() to a log file succeeded. This could
6173 lead to Bad Things if a log got too big, in particular if it hit a file
6174 size limit. Exim now panics and dies if it cannot write to a log file, just
6175 as it does if it cannot open a log file.
6177 39. Modified OS/Makefile-Linux so that it now contains
6179 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6181 The two -D definitions ensure that Exim is compiled with large file
6182 support, which makes it possible to handle log files that are bigger than
6185 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6186 instance) a domain was checked against a named list that involved a lookup,
6187 causing $domain_data to be set, then another domain was checked against the
6188 same list, then the first domain was re-checked, the value of $domain_data
6189 after the final check could be wrong. In particular, if the second check
6190 failed, it could be set empty. This bug probably also applied to
6193 41. The strip_trailing_dot option was not being applied to the address given
6194 with the -f command-line option.
6196 42. The code for reading a message's header from the spool was incrementing
6197 $received_count, but never initializing it. This meant that the value was
6198 incorrect (doubled) while delivering a message in the same process in which
6199 it was received. In the most common configuration of Exim, this never
6200 happens - a fresh exec is done - but it can happen when
6201 deliver_drop_privilege is set.
6203 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6204 it now includes up to 150 characters of the unexpected data in the log
6207 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6208 and building data strings. The size of both of these buffers was 10 000
6209 bytes - far larger than anybody would *ever* want, thought I. Needless to
6210 say, somebody hit the limit. I have increased the maximum line length to
6211 20 000 and the maximum data length of concatenated lines to 100 000. I have
6212 also fixed two bugs, because there was no checking on these buffers. Tsk,
6213 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6214 buffer is too small.
6216 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6217 lsearch lookups. Now it does.
6219 46. When parsing a route_list item in a manualroute router, a fixed-length
6220 buffer was used for the list of hosts. I made this 1024 bytes long,
6221 thinking that nobody would ever have a list of hosts that long. Wrong.
6222 Somebody had a whole pile of complicated expansion conditions, and the
6223 string was silently truncated, leading to an expansion error. It turns out
6224 that it is easier to change to an unlimited length (owing to other changes
6225 that have happened since this code was originally written) than to build
6226 structure for giving a limitation error. The length of the item that
6227 expands into the list of hosts is now unlimited.
6229 47. The lsearch lookup could not handle data where the length of text line was
6230 more than 4095 characters. Such lines were truncated, leading to shortened
6231 data being returned. It should now handle lines of any length.
6233 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6234 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6237 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6238 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6239 no longer happens in comment lines. A list of replacements is now placed
6240 at the head of all of the source files, except those whose only change is
6241 to replace PERL_COMMAND in the very first #! line.
6243 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6244 messages on the queue, with a bottom-up merge sort, using code contributed
6245 by Michael Haardt. This should make operations like -bp somewhat faster on
6246 large queues. It won't affect queue runners, except when queue_run_in_order
6249 51. Installed eximstats 1.31 in the distribution.
6251 52. Added support for SRV lookups to the dnslookup router.
6253 53. If an ACL referred to $message_body or $message_body_end, the value was not
6254 reset for any messages that followed in the same SMTP session.
6256 54. The store-handling optimization for building very long strings was not
6257 differentiating between the different store pools. I don't think this
6258 actually made any difference in practice, but I've tidied it.
6260 55. While running the routers to verify a sender address, $sender_address
6261 was still set to the sender address. This is wrong, because when routing to
6262 send a bounce to the sender, it would be empty. Therefore, I have changed
6263 it so that, while verifying a sender address, $sender_address is set to <>.
6264 (There is no change to what happens when verifying a recipient address.)
6266 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6267 target A or AAAA records (if not already returned) without resetting the
6268 qualify_single or search_parents options of the DNS resolver. These are
6269 inappropriate in this case because the targets of MX and SRV records must
6270 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6271 target that, when qualified, matched something in the local domain. These
6272 two options are now turned off when doing these lookups.
6274 57. It seems that at least some releases of Reiserfs (which does not have the
6275 concept of a fixed number of inodes) returns zero and not -1 for the
6276 number of available inodes. This interacted badly with check_spool_inodes,
6277 which assumed that -1 was the "no such thing" setting. What I have done is
6278 to check that the total number of inodes is greater than zero before doing
6279 the test of how many are available.
6281 58. When a "warn" ACL statement has a log_message modifier, the message is
6282 remembered, and not repeated. This is to avoid a lot of repetition when a
6283 message has many recipients that cause the same warning to be written.
6284 However, Exim was preserving the list of already written lines for an
6285 entire SMTP session, which doesn't seem right. The memory is now reset if a
6286 new message is started.
6288 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6289 debugging output unless log_rewrite was also set.
6291 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6292 of (int)(handle) when we know that handle contains (void *)(-1).
6294 61. The Exim daemon panic-logs an error return when it closes the incoming
6295 connection. However "connection reset by peer" seems to be common, and
6296 isn't really an error worthy of noting specially, so that particular error
6299 62. When Exim is trying to find all the local interfaces, it used to panic and
6300 die if the ioctl to get the interface flags failed. However, it seems that
6301 on at least one OS (Solaris 9) it is possible to have an interface that is
6302 included in the list of interfaces, but for which you get a failure error
6303 for this call. This happens when the interface is not "plumbed" into a
6304 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6305 failure of the "get flags" call assumes that the interface is down.
6307 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6308 makes life easier for people who are doing arithmetic on fields extracted
6309 from dates, where you often get leading zeros that should not be
6310 interpreted as octal.
6312 64. Added qualify_domain to the redirect router, to override the global
6315 65. If a pathologically long header line contained very many addresses (the
6316 report of this problem mentioned 10 000) and each of them was rewritten,
6317 Exim could use up a very large amount of memory. (It kept on making new
6318 copies of the header line as it rewrote, and never released the old ones.)
6319 At the expense of a bit more processing, the header rewriting function has
6320 been changed so that it no longer eats memory in this way.
6322 66. The generation of the Received: header has been moved from the time that a
6323 message starts to be received, to the time that it finishes. The timestamp
6324 in the Received: header should now be very close to that of the <= log
6325 line. There are two side-effects of this change:
6327 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6328 logged header lines no longer include the local Received: line, because
6329 it has not yet been created. The same applies to a copy of the message
6330 that is returned to a non-SMTP sender when a message is rejected.
6332 (b) When a filter file is tested using -bf, no additional Received: header
6333 is added to the test message. After some thought, I decided that this
6336 This change does not affect the value of $received_for. It is still set
6337 after address rewriting, but before local_scan() is called.
6339 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6341 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6342 gave an unhelpful panic error message, and a defer error. I have managed to
6343 change this behaviour so that it now rejects any supplied certificate,
6344 which seems right, as the list of acceptable certificates is empty.
6346 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6347 gave an unhelpful defer error. I have not managed to make this reject any
6348 supplied certificates, but the error message it gives is "no certificate
6349 supplied", which is not helpful.
6351 70. exigrep's output now also includes lines that are not associated with any
6352 message, but which match the given pattern. Implemented by a patch from
6353 Martin Sluka, which also tidied up the Perl a bit.
6355 71. Recipient callout verification, like sender verification, was using <> in
6356 the MAIL FROM command. This isn't really the right thing, since the actual
6357 sender may affect whether the remote host accepts the recipient or not. I
6358 have changed it to use the actual sender in the callout; this means that
6359 the cache record is now keyed on a recipient/sender pair, not just the
6360 recipient address. There doesn't seem to be a real danger of callout loops,
6361 since a callout by the remote host to check the sender would use <>.
6362 [SEE ABOVE: changed after hitting problems.]
6364 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6365 temporary errors. However, in the case of such a code being given after
6366 the end of a data transmission (i.e. after ".") Exim was failing to write
6367 a retry record for the message. (Yes, there was some broken host that was
6368 actually sending 8xx at this point.)
6370 73. An unknown lookup type in a host list could cause Exim to panic-die when
6371 the list was checked. (An example that provoked this was putting <; in the
6372 middle of a list instead of at the start.) If this happened during a DATA
6373 ACL check, a -D file could be left lying around. This kind of configuration
6374 error no longer causes Exim to die; instead it causes a defer error. The
6375 incident is still logged to the main and panic logs.
6377 74. Buglet left over from Exim 3 conversion. The message "too many messages
6378 in one connection" was written to the rejectlog but not the mainlog, except
6379 when address rewriting (yes!) was being logged.
6381 75. Added write_rejectlog option.
6383 76. When a system filter was run not as root (that is, when system_filter_user
6384 was set), the values of the $n variables were not being returned to the
6385 main process; thus, they were not subsequently available in the $sn
6388 77. Added +return_path_on_delivery log selector.
6390 78. A connection timeout was being treated differently from recipients deferred
6391 when testing hosts_max_try with a message that was older than the host's
6392 retry timeout. (The host should not be counted, thus allowing all hosts to
6393 be tried at least once before bouncing.) This may have been the cause of an
6394 occasionally reported bug whereby a message would remain on the queue
6395 longer than the retry timeout, but would be bounced if a delivery was
6396 forced. I say "may" because I never totally pinned down the problem;
6397 setting up timeout/retry tests is difficult. See also the next item.
6399 79. The ultimate address timeout was not being applied to errors that involved
6400 a combination of host plus message (for example, a timeout on a MAIL
6401 command). When an address resolved to a number of possible hosts, and they
6402 were not all tried for each delivery (e.g. because of hosts_max_try), a
6403 message could remain on the queue longer than the retry timeout.
6405 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6408 81. Fixed an obscure SMTP outgoing bug which required at least the following
6409 conditions: (a) there was another message waiting for the same server;
6410 (b) the server returned 5xx to all RCPT commands in the first message so
6411 that the message was not completed; (c) the server dropped the connection
6412 or gave a negative response to the RSET that Exim sends to abort the
6413 transaction. The observed case was a dropped connection after DATA that had
6414 been sent in pipelining mode. That is, the server had advertised PIPELINING
6415 but was not implementing it correctly. The effect of the bug was incorrect
6416 behaviour, such as trying another host, and this could lead to a crash.
6422 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6423 and daemon.c were passed as pointers to ints; they should have been
6424 pointers to socklen_t variables (which are typically unsigned ints).
6426 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6429 3. Fixed a really odd bug that affected only the testing scheme; patching a
6430 certain fixed string in the binary changed the value of another string that
6431 happened to be identical to the end of the original first string.
6433 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6434 name", it returns that address as the IP address. On some operating
6435 systems (e.g. Solaris), it also passes back the IP address string as the
6436 "host name". However, on others (e.g. Linux), it passes back an empty
6437 string. Exim wasn't checking for this, and was changing the host name to an
6438 empty string, assuming it had been canonicalized.
6440 5. Although rare, it is permitted to have more than one PTR record for a given
6441 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6442 all the names associated with an address, because they do in Solaris.
6443 However, it seems that they do not in Linux for data that comes from the
6444 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6445 I found this out when I moved to a new Linux workstation and tried to run
6446 the Exim test suite.
6448 To get round this problem I have changed the code so that it now does its
6449 own call to the DNS to look up PTR records when searching for a host name.
6450 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6451 addresses that are only in /etc/hosts are still found.
6453 This behaviour is, however, controlled by an option called host_lookup_
6454 order, which defaults to "bydns:byaddr". If people want to use the other
6455 order, or indeed, just use one or the other means of lookup, they can
6456 specify it in this variable.
6458 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6459 some operating systems, this comes back from gethostbyaddr() as an empty
6460 string, and this is what Exim used to test for. However, it seems that in
6461 other systems, "." is yielded. Exim now tests for this case too.
6463 7. The values of check_spool_space and check_log_space are now held internally
6464 as a number of kilobytes instead of an absolute number of bytes. If a
6465 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6466 kilobyte. This means that much larger values can be stored.
6468 8. Exim monitor: an attempt to get the action menu when not actually pointing
6469 at a message produces an empty menu entitled "No message selected". This
6470 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6471 no entries in it ("Shell widget menu has zero width and/or height"). So I
6472 have added a single, blank menu entry in this case.
6474 9. Added ${quote_local_part.
6476 10. MIME decoding is now applied to the contents of Subject: header lines when
6479 11. Now that a reference to $sender_host_address automatically causes a reverse
6480 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6481 host lookup before query-style lookups in lists that might use this
6482 variable. This has therefore been abolished, and the "net-" prefix is no
6483 longer necessary for query-style lookups.
6485 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6486 have been a typo for LFLAGS, so it has been changed.
6488 13. The install script calls Exim with "-C /dev/null" in order to find the
6489 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6490 to be output. However, since Exim outputs its version number before the
6491 error, it didn't break the script. It just looked ugly. I fixed this by
6492 always allowing "-C /dev/null" if the caller is root.
6494 14. Ignore overlarge ACL variable number when reading spool file - insurance
6495 against a later release with more variables having written the file.
6497 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6498 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6499 this, as well as the form without the "IPv6" on the front.
6501 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6502 OS/Makefile-Darwin file.
6504 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6505 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6507 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6508 variable. However, some OS use ints for inodes. I've added cast to long int
6509 to get rid of the compiler warning.
6511 19. I had forgotten to lock out "/../" in configuration file names when
6512 ALT_CONFIG_PREFIX was set.
6514 20. Routers used for verification do not need to specify transports. However,
6515 if such a router generated a host list, and callout was configured, Exim
6516 crashed, because it could not find a port number from the (non-existent)
6517 transport. It now assumes port 25 in this circumstance.
6519 21. Added the -t option to exigrep.
6521 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6522 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6523 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6524 them is set, LOOKUP_LSEARCH is forced.
6526 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6528 24. Added sender and host information to the "rejected by local_scan()" log
6529 line; previously there was no indication of these.
6531 25. Added .include_if_exists.
6533 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6534 Linux. It turns out that not all file systems support this. Apparently some
6535 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6536 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6537 not supported on the file descriptor, is now ignored when Exim is trying to
6538 sync a directory. This applies only to Linux.
6540 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6542 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6543 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6546 29. Added support for maildirsize files from supplied patch (modified a bit).
6548 30. The use of :fail: followed by an empty string could lead Exim to respond to
6549 sender verification failures with (e.g.):
6551 550 Verification failed for <xxx>
6552 550 Sender verify failed
6554 where the first response line was missing the '-' that indicates it is not
6555 the final line of the response.
6557 31. The loop for finding the name of the user that called Exim had a hardwired
6558 limit of 10; it now uses the value of finduser_retries, which is used for
6559 all other user lookups.
6561 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6564 33. Exim was neglecting to zero errno before one call of strtol() when
6565 expanding a string and expecting an integer value. On some systems this
6566 resulted in spurious "integer overflow" errors. Also, it was casting the
6567 result into an int without checking.
6569 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6570 did not work. The code looks as if it has *never* worked, though it appears
6571 to have been documented since at least release 1.62. I have made it work.
6573 35. The "timeout_DNS" error in retry rules, also documented since at least
6574 1.62, also never worked. As it isn't clear exactly what this means, and
6575 clearly it isn't a major issue, I have abolished the feature by treating it
6576 as "timeout", and writing a warning to the main and panic logs.
6578 36. The display of retry rules for -brt wasn't always showing the error code
6581 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6582 timeout_connect_A, timeout_connect_MX.
6584 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6585 to the empty sender.
6587 39. The daemon was not analysing the content of -oX till after it had closed
6588 stderr and disconnected from the controlling terminal. This meant that any
6589 syntax errors were only noted on the panic log, and the return code from
6590 the command was 0. By re-arranging the code a little, I've made the
6591 decoding happen first, so such errors now appear on stderr, and the return
6592 code is 1. However, the actual setting up of the sockets still happens in
6593 the disconnected process, so errors there are still only recorded on the
6596 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6597 connections (as happens on some IP stacks) was logged at start up time as
6598 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6599 it from "IPv6 and IPv4", which means that two separate sockets are being
6602 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6603 says whether AF_INET or AF_INET6 was passed as an argument.
6605 42. Exiwhat output was messed up when time zones were included in log
6608 43. Exiwhat now gives more information about the daemon's listening ports,
6609 and whether -tls-on-connect was used.
6611 44. The "port" option of the smtp transport is now expanded.
6613 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6614 silently ignored. Now an error message is written to the main and panic
6617 46. There's a new ACL modifier called "logwrite" which writes to a log file
6618 as soon as it is encountered.
6620 47. Added $local_user_uid and $local_user_gid at routing time.
6622 48. Exim crashed when trying to verify a sender address that was being
6625 49. Exim was recognizing only a space character after ".include". It now also
6626 recognizes a tab character.
6628 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6629 extracting the relevant information from the specification. The man page no
6630 longer contains scrambled data for the -d option, and I've added a section
6631 at the front about calling Exim under different names.
6633 51. Added "extra_headers" argument to the "mail" command in filter files.
6635 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6638 53. Installed eximstats 1.29.
6640 54. Added transport_filter_timeout as a generic transport option.
6642 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6643 Cc: header lines. This was required by RFC 822, but it not required by RFC
6646 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6647 incoming messages that did not have them. Now it does so only if the
6648 message originates locally, that is, if there is no associated remote host
6649 address. When Resent- header lines are present, this applies to the Resent-
6650 lines rather than the non-Resent- lines.
6652 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6653 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6655 58. Messages for configuration errors now include the name of the main
6656 configuration file - useful now that there may be more than one file in a
6657 list (.included file names were always shown).
6659 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6660 for those rare installations that do not start the daemon as root or run it
6661 setuid root. I've cut out the call to initgroups() if the daemon is not
6664 60. The Exim user and group can now be bound into the binary as text strings
6665 that are looked up at the start of Exim's processing.
6667 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6669 62. Added $mailstore_basename variable.
6671 63. Installed patch to sieve.c from Michael Haardt.
6673 64. When Exim failed to open the panic log after failing to open the main log,
6674 the original message it was trying to log was written to stderr and debug
6675 output, but if they were not available (the usual case in production), it
6676 was lost. Now it is written to syslog before the two lines that record the
6677 failures to open the logs.
6679 65. Users' Exim filters run in subprocesses under the user's uid. It is
6680 possible for a "deliver" command or an alias in a "personal" command to
6681 provoke an address rewrite. If logging of address rewriting is configured,
6682 this fails because the process is not running as root or exim. There may be
6683 a better way of dealing with this, but for the moment (because 4.30 needs
6684 to be released), I have disabled address rewrite logging when running a
6685 filter in a non-root, non-exim process.
6691 1. The buildconfig auxiliary program wasn't quoting the value set for
6692 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6693 not defined. This bug was masked in 4.22 by the effect that was fixed in
6696 2. Some messages that were rejected after a message id was allocated were
6697 shown as "incomplete" by exigrep. It no longer does this for messages that
6698 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6700 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6701 have allow_domain_literals set, the ID did not get logged in the <= line.
6702 Domain literals are now always recognized in Message-ID: header lines.
6704 4. The first argument for a ${extract expansion item is the key name or field
6705 number. Leading and trailing spaces in this item were not being ignored,
6706 causing some misleading effects.
6708 5. When deliver_drop_privilege was set, single queue runner processes started
6709 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6710 same command in the process it spins off) were not dropping privilege.
6712 6. When the daemon running as "exim" started a queue runner, it always
6713 re-executed Exim in the spun-off process. This is a waste of effort when
6714 deliver_drop_privilege is set. The new process now just calls the
6715 queue-runner function directly.
6721 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6724 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6725 ignored. Though the use of -oP was forcing the writing of a pid file, it
6726 was always written to the default place.
6728 3. If the message "no IP address found for host xxxx" is generated during
6729 incoming verification, it is now followed by identification of the incoming
6730 connection (so you can more easily find what provoked it).
6732 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6734 5. Added some features to "harden" Exim a bit more against certain attacks:
6736 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6737 be put in Local/Makefile. This is like the never_users runtime option,
6738 but it cannot be overridden. The default setting is "root".
6740 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6741 prefix string with which any file named in a -C command line option
6744 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6745 is retained for -C and -D only if the caller of Exim is root. Without
6746 it, the exim user may also use -C and -D and retain privilege.
6748 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6749 command line option is disabled.
6751 6. Macro names set by the -D option must start with an upper case letter, just
6752 like macro names defined in the configuration file.
6754 7. Added "dereference=" facility to LDAP.
6756 8. Two instances of the typo "uknown" in the source files are fixed.
6758 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6759 the Configure-Makefile script screwed up while processing it.
6761 10. Incorporated PCRE 4.4.
6763 11. The SMTP synchronization check was not operating right at the start of an
6764 SMTP session. For example, it could not catch a HELO sent before the client
6765 waited for the greeting. There is now a check for outstanding input at the
6766 point when the greeting is written. Because of the duplex, asynchronous
6767 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6768 way, but not yet received, when the check is performed.
6770 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6771 on TCP/IP sockets, because this apparently causes some broken clients to
6774 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6775 unchanged) from the Cygwin maintainer.
6777 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6778 was supported instead of testing for mbx. Effectively a typo.
6780 15. The spa authenticator server code was not checking that the input it
6781 received was valid base64.
6783 16. The debug output line for the "set" modifier in ACLs was not showing the
6784 name of the variable that was being set.
6786 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6788 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6789 lookup on its own. Something else was needed to trigger the lookup. For
6790 example, a match in host_lookup or the need for a host name in a host list.
6791 Now, if $sender_host_name is referenced and the host name has not yet been
6792 looked up, a lookup is performed. If the lookup fails, the variable remains
6793 empty, and $host_lookup_failed is set to "1".
6795 19. Added "eqi" as a case-independent comparison operator.
6797 20. The saslauthd authentication condition could segfault if neither service
6798 nor realm was specified.
6800 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6801 error message that was logged was misleading, and incoming SMTP
6802 connections were dropped. The message is now more accurate, and temporary
6803 errors are given to SMTP connections.
6805 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6806 (except RSET) with a 421 error, until QUIT is received. However, it was
6807 failing to send a response to QUIT.
6809 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6810 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6811 ACL is now run after the helo_try_verify_hosts code.
6813 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6814 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6815 case-independent, so other case variants are also recognized). Apparently
6816 some systems use these upper case variants.
6818 25. If more than two messages were waiting for the same host, and a transport
6819 filter was specified for the transport, Exim sent two messages over the
6820 same TCP/IP connection, and then failed with "socket operation on non-
6821 socket" when it tried to send the third.
6823 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6825 27. The extern definition of crypt16() in expand.c was not being excluded when
6826 the OS had its own crypt16() function.
6828 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6829 as a preferred synonym for return_size_limit, both as an option and as an
6832 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6834 30. Changed the default configuration ACL to relax the local part checking rule
6835 for addresses that are not in any local domains. For these addresses,
6836 slashes and pipe symbols are allowed within local parts, but the sequence
6837 /../ is explicitly forbidden.
6839 31. SPA server authentication was not clearing the challenge buffer before
6842 32. log_message in a "warn" ACL statement was writing to the reject log as
6843 well as to the main log, which contradicts the documentation and doesn't
6844 seem right (because no rejection is happening). So I have stopped it.
6846 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6847 However, I am unable to do any testing of this.
6849 34. Fixed an infelicity in the appendfile transport. When checking directories
6850 for a mailbox, to see if any needed to be created, it was accidentally
6851 using path names with one or more superfluous leading slashes; tracing
6852 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6854 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6855 contents are added to the log line that is written for every discarded
6856 recipient. (Previously a log_message setting was ignored.)
6858 36. The ${quote: operator now quotes the string if it is empty.
6860 37. The install script runs exim in order to find its version number. If for
6861 some reason other than non-existence or emptiness, which it checks, it
6862 could not run './exim', it was installing it with an empty version number,
6863 i.e. as "exim-". This error state is now caught, and the installation is
6866 38. An argument was missing from the function that creates an error message
6867 when Exim fails to connect to the socket for saslauthd authentication.
6868 This could cause Exim to crash, or give a corrupted message.
6870 39. Added isip, isip4, and isip6 to ${if conditions.
6872 40. The ACL variables $acl_xx are now saved with the message, and can be
6873 accessed later in routers, transports, and filters.
6875 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6876 strings in the file are not string-expanded.
6878 42. If a MAIL command specified a SIZE value that was too large to fit into an
6879 int variable, the check against message_size_limit failed. Such values are
6880 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6881 day this will have to be increased, but I don't think I want to be around
6882 when emails are that large.
6889 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6890 iconv() is not standard in FreeBSD.
6892 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6893 IPv6 enabled. The observed symptom was a segmentation fault on return from
6894 the function os_common_find_running_interfaces() in src/os.c.
6896 3. In the check_special_case() function in daemon.c I had used "errno" as an
6897 argument name, which causes warnings on some systems. This was basically a
6898 typo, since it was named "eno" in the comments!
6900 4. The code that waits for the clock to tick (at a resolution of some fraction
6901 of a second) so as to ensure message-id uniqueness was always waiting for
6902 at least one whole tick, when it could have waited for less. [This is
6903 almost certainly not relevant at current processor speeds, where it is
6904 unlikely to ever wait at all. But we try to future-proof.]
6906 5. The function that sleeps for a time interval that includes fractions of a
6907 second contained a race. It did not block SIGALRM between setting the
6908 timer, and suspending (a couple of lines later). If the interval was short
6909 and the sigsuspend() was delayed until after it had expired, the suspension
6910 never ended. On busy systems this could lead to processes getting stuck for
6913 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6914 process, before it forks any delivery processes. The open lookup caching
6915 mechanism meant that the open file or database connection was passed into
6916 the delivery process. The problem was that delivery processes always tidy
6917 up cached lookup data. This could cause a problem for the next delivery
6918 process started by the queue runner, because the external queue runner
6919 process does not know about the closure. So the next delivery process
6920 still has data in the lookup cache. In the case of a file lookup, there was
6921 no problem because closing a file descriptor in a subprocess doesn't affect
6922 the parent. However, if the lookup was caching a connection to a database,
6923 the connection was closed, and the second delivery process was likely to
6924 see errors such as "PGSQL: query failed: server closed the connection
6925 unexpectedly". The problem has been fixed by closing all cached lookups
6926 in a queue runner before running a delivery process.
6928 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6929 seem to have the "const" qualifier which it has on other OS. I've
6932 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6933 *of the same type* (client or server) with the same public name that an
6934 error should be diagnosed.
6936 9. When Exim looked up a host name for an IP address, but failed to find the
6937 original IP address when looking up the host name (a safety check), it
6938 output the message "<ip address> does not match any IP for NULL", which was
6939 confusing, to say the least. The bug was that the host name should have
6940 appeared instead of "NULL".
6942 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6943 user that is built into the binary, and the -C or -D options is used, root
6944 privilege is dropped before the configuration file is read. In addition,
6945 logging is switched to stderr instead of the normal log files. If the
6946 configuration then re-defines the Exim user, the unprivileged environment
6947 is probably not what is expected, so Exim logs a panic warning message (but
6950 However, if deliver_drop_privilege is set, the unprivileged state may well
6951 be exactly what is intended, so the warning has been cut out in that case,
6952 and Exim is allowed to try to write to its normal log files.
6958 1. smtp_return_error_details was not giving details for temporary sender
6959 or receiver verification errors.
6961 2. Diagnose a configuration error if two authenticators have the same public
6964 3. Exim used not to create the message log file for a message until the first
6965 delivery attempt. This could be confusing when incoming messages were held
6966 for policy or load reasons. The message log file is now created at the time
6967 the message is received, and an initial "Received" line is written to it.
6969 4. The automatically generated man page for command line options had a minor
6970 bug that caused no ill effects; however, a more serious problem was that
6971 the procedure for building the man page automatically didn't always
6972 operate. Consequently, release 4.20 contains an out-of-date version. This
6973 shouldn't happen again.
6975 5. When building Exim with embedded Perl support, the script that builds the
6976 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6977 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6979 6. The freeze_tell option was not being used for messages that were frozen on
6980 arrival, either by an ACL or by local_scan().
6982 7. Added the smtp_incomplete_transaction log selector.
6984 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6985 was accepting AUTH without a new EHLO.
6987 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6988 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6991 10. Logging of TCP/IP connections (when configured) now happens in the main
6992 daemon process instead of the child process, so that the TCP/IP connection
6993 count is more accurate (but it can never be perfect).
6995 11. The use of "drop" in a nested ACL was not being handled correctly in the
6996 outer ACL. Now, if condition failure induced by the nested "drop" causes
6997 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6998 or "require"), the connection is dropped.
7000 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7001 that yield "discard" can now be used with an "accept" or a "discard" verb,
7002 but an error is generated for any others (because I can't see a useful way
7003 to define what should happen).
7005 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7006 are now processed in the same way as lines in the Exim configuration file.
7007 In particular, continuation lines are supported.
7009 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7011 15. Added -ti meaning -t -i.
7013 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7014 domains, and warn by logging if others are found.
7016 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7017 returned from GIFCONF when Exim is trying to find the list of interfaces on
7018 a host. The code in os.c has been modified to copy each ifreq to an aligned
7019 structure in all cases.
7021 Also, in some cases, the returned ifreq's were being copied to a 'struct
7022 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7023 means the last couple of bytes of an IPv6 address could be chopped if the
7024 ifreq contained only a normal sockaddr (14 bytes storage).
7026 18. Named domain lists were not supported in the hosts_treat_as_local option.
7027 An entry such as +xxxx was not recognized, and was treated as a literal
7030 19. Ensure that header lines added by a DATA ACL are included in the reject log
7031 if the ACL subsequently rejects the message.
7033 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7034 MD5 (which is deprecated).
7036 21. When testing a filter file using -bf, Exim was writing a message when it
7037 took the sender from a "From " line in the message, but it was not doing so
7038 when it took $return_path from a Return-Path: header line. It now does.
7040 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7041 with a valid header line field name (a series of printing characters
7042 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7044 23. Changed "disc" in the source to "disk" to conform to the documentation and
7045 the book and for uniformity.
7047 24. Ignore Sendmail's -Ooption=value command line item.
7049 25. When execve() failed while trying to run a command in a pipe transport,
7050 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7051 could be confused with a return value of 69 from the command itself. This
7052 has been changed to 127, the value the shell returns if it is asked to run
7053 a non-existent command. The wording for the related log line suggests a
7054 non-existent command as the problem.
7056 26. If received_header_text expands to an empty string, do not add a Received:
7057 header line to the message. (Well, it adds a token one on the spool, but
7058 marks it "old" so that it doesn't get used or transmitted.)
7060 27. Installed eximstats 1.28 (addition of -nt option).
7062 28. There was no check for failure on the call to getsockname() in the daemon
7063 code. This can fail if there is a shortage of resources on the system, with
7064 ENOMEM, for example. A temporary error is now given on failure.
7066 29. Contrary to the C standard, it seems that in some environments, the
7067 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7068 program. Exim now does this explicitly; it affects the formatting of
7069 timestamps using strftime().
7071 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7072 complaints. I've now initialized all the variables, to avoid this.
7074 32. Header lines added by a system filter were not being "seen" during
7075 transport-time rewrites.
7077 33. The info_callback() function passed to OpenSSL is set up with type void
7078 (*)(SSL *, int, int), as described somewhere. However, when calling the
7079 function (actually a macro) that sets it up, the type void(*)() is
7080 expected. I've put in a cast to prevent warnings from picky compilers.
7082 34. If a DNS black list lookup found a CNAME record, but there were no A
7083 records associated with the domain it pointed at, Exim crashed.
7085 35. If a DNS black list lookup returned more than one A record, Exim ignored
7086 all but the first. It now scans all returned addresses if a particular IP
7087 value is being sought. In this situation, the contents of the
7088 $dnslist_value variable are a list of all the addresses, separated by a
7091 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7092 to accept a host name and all its aliases if the forward lookup for any of
7093 them yielded the IP address of the incoming connection. Now it accepts only
7094 those names whose forward lookup yields the correct IP address. Any other
7095 names are discarded. This closes a loophole whereby a rogue DNS
7096 administrator could create reverse DNS records to break through a
7097 wildcarded host restriction in an ACL.
7099 37. If a user filter or a system filter that ran in a subprocess used any of
7100 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7101 the wrong values were passed to the pipe command ($thisaddress had the
7102 value of $0, $0 had the value of $1, etc). This bug was introduced by
7103 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7105 38. Improved the line breaking for long SMTP error messages from ACLs.
7106 Previously, if there was no break point between 40 and 75 characters, Exim
7107 left the rest of the message alone. Two changes have been made: (a) I've
7108 reduced the minimum length to 35 characters; (b) if it can't find a break
7109 point between 35 and 75 characters, it looks ahead and uses the first one
7110 that it finds. This may give the occasional overlong line, but at least the
7111 remaining text gets split now.
7113 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7114 file descriptors might be low, and that setting 1000 would always raise it.
7115 It turns out that in some environments, the limit is already over 1000 and
7116 that lowering it causes trouble. So now Exim takes care not to decrease it.
7118 40. When delivering a message, the value of $return_path is set to $sender_
7119 address at the start of routing (routers may change the value). By an
7120 oversight, this default was not being set up when an address was tested by
7121 -bt or -bv, which affected the outcome if any router or filter referred to
7124 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7125 log only when "message" or "log_message" are set. However, if one of the
7126 conditions was an address verification, or a call to a nested ACL, the
7127 messages generated by the underlying test were being passed through. This
7128 no longer happens. The underlying message is available in $acl_verify_
7129 message for both "message" and "log_message" expansions, so it can be
7130 passed through if needed.
7132 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7133 new expansion $bh_ to give the encoded byte string without charset
7134 translation. Translation happens only if iconv() is available; HAVE_ICONV
7135 indicates this at build time. HEADERS_CHARSET gives the charset to
7136 translate to; headers_charset can change it in the configuration, and
7137 "headers charset" can change it in an individual filter file.
7139 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7140 that creates RFC 2047 encoded "words" labels them as that charset instead
7141 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7142 expansion operator; (ii) when Exim creates a From: line for a local
7143 message; (iii) when a header line is rewritten to include a "phrase" part.
7145 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7146 buggy, causing it to skip the first lines of messages whose message ID
7147 ended in 'D'. This would not have bitten before Exim release 4.14, because
7148 message IDs were unlikely to end in 'D' before then. The effect was to have
7149 incorrect size information for certain domains.
7151 45. #include "config.h" was missing at the start of the crypt16.c module. This
7152 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7155 46. If there was a timeout during a "random" callout check, Exim treated it as
7156 a failure of the random address, and carried on sending RSET and the real
7157 address. If the delay was just some slowness somewhere, the response to the
7158 original RCPT would be taken as a response to RSET and so on, causing
7159 mayhem of various kinds.
7161 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7162 when I implemented it. It didn't allow for the fact that some option values
7163 may legitimately be negative (e.g. size_addition), and it didn't even do
7164 the right test for positive values.
7166 48. Domain names in DNS records are case-independent. Exim always looks them up
7167 in lower case. Some resolvers return domain names in exactly the case they
7168 appear in the zone file, that is, they may contain uppercase letters. Not
7169 all resolvers do this - some return always lower case. Exim was treating a
7170 change of case by a resolver as a change of domain, similar to a widening
7171 of a domain abbreviation. This triggered its re-routing code and so it was
7172 trying to route what was effectively the same domain again. This normally
7173 caused routing to fail (because the router wouldn't handle the domain
7174 twice). Now Exim checks for this case specially, and just changes the
7175 casing of the domain that it ultimately uses when it transmits the message
7178 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7181 50. If a filter generated a file delivery with a non-absolute name (possible if
7182 no home directory exists for the router), the forbid_file option was not
7185 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7186 the existing equality matching.
7188 52. Exim was using ints instead of ino_t variables in some places where it was
7189 dealing with inode numbers.
7191 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7192 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7193 called TMPDIR, and if it finds it is different, it changes its value.
7195 54. The smtp_printf() function is now made available to local_scan() so
7196 additional output lines can be written before returning. There is also an
7197 smtp_fflush() function to enable the detection of a dropped connection.
7198 The variables smtp_input and smtp_batched_input are exported to
7201 55. Changed the default runtime configuration: the message "Unknown user"
7202 has been removed from the ACL, and instead placed on the localuser router,
7203 using the cannot_route_message feature. This means that any verification
7204 failures that generate their own messages won't get overridden. Similarly,
7205 the "Unrouteable address" message that was in the ACL for unverifiable
7206 relay addresses has also been removed.
7208 56. Added hosts_avoid_esmtp to the smtp transport.
7210 57. The exicyclog script was not checking for the esoteric option
7211 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7212 will work only if exicyclog is run under the appropriate euid.
7214 58. Following a discussion on the list, the rules by which Exim recognises line
7215 endings on incoming messages have been changed. The -dropcr and drop_cr
7216 options are now no-ops, retained only for backwards compatibility. The
7217 following line terminators are recognized: LF CRLF CR. However, special
7218 processing applies to CR:
7220 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7221 nor a local message in the state where . is a terminator.
7223 (ii) If a bare CR is encountered in a header line, an extra space is added
7224 after the line terminator so as not to end the header. The reasoning
7225 behind this is that bare CRs in header lines are most likely either
7226 to be mistakes, or people trying to play silly games.
7228 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7229 was being incorrectly given as 18 bytes larger than it should have been.
7230 This is a VOB (very old bug).
7232 60. This may never have affected anything current, but just in case it has:
7233 When the local host is found other than at the start of a list of hosts,
7234 the local host, those with the same MX, and any that follow, are discarded.
7235 When the list in question was part of a longer list of hosts, the following
7236 hosts (not currently being processed) were also being discarded. This no
7237 longer happens. I'm not sure if this situation could ever has previously
7240 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7243 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7244 header. This is something that is recommended in a new Internet Draft, and
7245 is something that is documented as being done by Sendmail. There are two
7246 possible values. For messages generated by the autoreply transport, Exim
7249 Auto-Submitted: auto-replied
7251 whereas for all other generated messages (e.g. bounces) it adds
7253 Auto-Submitted: auto-generated
7255 63. The "personal" condition in filters now includes a test for the
7256 Auto-Submitted: header. If it contains the string "auto-" the message it
7257 not considered personal.
7259 64. Added rcpt_include_affixes as a generic transport option.
7261 65. Added queue_only_override (default true).
7263 66. Added the syslog_duplication option.
7265 67. If what should have been the first header line of a message consisted of
7266 a space followed by a colon, Exim was mis-interpreting it as a header line.
7267 It isn't of course - it is syntactically invalid and should therefore be
7268 treated as the start of the message body. The misbehaviour could have
7269 caused a number of strange effects, including loss of data in subsequent
7270 header lines, and spool format errors.
7272 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7273 client host had authenticated. This control can now be exercised by an ACL
7274 for more flexibility.
7276 69. By default, callouts do not happen when testing with -bh. There is now a
7277 variant, -bhc, which does actually run the callout code, including
7278 consulting and updating the callout cache.
7280 70. Added support for saslauthd authentication, courtesy of Alexander
7283 71. If statvfs() failed on the spool or log directories while checking their
7284 size for availability, Exim confusingly gave the error "space shortage".
7285 Furthermore, in debugging mode it crashed with a floating point exception.
7286 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7287 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7288 serious problem, Exim now writes to the main and panic logs when this
7289 happens, with details of the failure. It then refuses to accept the
7290 incoming message, giving the message "spool directory problem" or "log
7291 directory problem" with a 421 code for SMTP messages.
7293 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7294 0, 1, and 2 exist, because some OS complain for execs without them (see
7295 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7296 descriptors. However, the code omitted to check that the open succeeded,
7297 causing mysterious errors if for some reason the permissions on /dev/null
7298 got screwed. Now Exim writes a message to the main and panic logs, and
7299 bombs out if it can't open /dev/null.
7301 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7302 interact so that it is all more flexible. It is supposed to remain
7303 backwards compatible. Also added extra_local_interfaces.
7305 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7306 to bomb out with an assertion failure - to the client this appears as a
7307 connection drop. This problem occurs in the part of the code that was taken
7308 from the Samba project. Fortunately, the assertion is in a very simple
7309 function, so I have fixed this by reproducing the function inline in the
7310 one place where it is called, and arranging for authentication to fail
7311 instead of killing the process with assert().
7313 75. The SPA client code was not working when the server requested OEM rather
7314 than Unicode encoding.
7316 76. Added code to make require_files with a specific uid setting more usable in
7317 the case where statting the file as root fails - usually a non-root-mounted
7318 NFS file system. When this happens and the failure is EACCES, Exim now
7319 forks a subprocess and does the per-uid checking as the relevant uid.
7321 77. Added process_log_path.
7323 78. If log_file_path was not explicitly set, a setting of check_log_space or
7324 check_log_inodes was ignored.
7326 79. If a space check for the spool or log partitions fails, the incident is now
7327 logged. Of course, in the latter case the data may get lost...
7329 80. Added the %p formatting code to string_format() so that it can be used to
7330 print addresses in debug_print(). Adjusted all the address printing in the
7331 debugging in store.c to use %p rather than %d.
7333 81. There was a concern that a line of code in smtp_in.c could overflow a
7334 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7335 initially expressed, the concern was not well-founded, because trailing
7336 spaces are removed early. However, if the trailing spaces were followed by
7337 a NULL, they did not get removed, so the overflow was possible. Two fixes
7340 (a) I re-wrote the offending code in a cleaner fashion.
7341 (b) If an incoming SMTP command contains a NULL character, it is rejected
7344 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7345 runs initgroups(), so that if the Exim user is in any additional groups,
7346 they will be used during message reception.
7352 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob