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 Remove code calling the customisable local_scan function, unless a new
12 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
14 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
15 non-signal-safe functions being used.
17 JH/03 Bug 2269: When presented with a received message having a stupidly large
18 number of DKIM-Signature headers, disable DKIM verification to avoid
19 a resource-consumption attack. The limit is set at twenty.
21 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
22 report of oldest_pass in ${authres } in consequence, and separate out
23 some descriptions of reasons for verification fail.
25 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
26 files in the spool were present and unlocked. A queue-runner could spot
27 them, resulting in a duplicate delivery. Fix that by doing the unlock
28 after the unlink. Investigation by Tim Stewart. Take the opportunity to
29 add more error-checking on spoolfile handling while that code is being
32 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
33 No known attacks, no CVE, this is defensive hardening.
35 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
36 a queue-runner could start a delivery while other operations were ongoing.
37 Cutthrough delivery was a common victim, resulting in duplicate delivery.
38 Found and investigated by Tim Stewart. Fix by using the open message data
39 file handle rather than opening another, and not locally closing it (which
40 releases a lock) for that case, while creating the temporary .eml format
41 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
43 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
44 $sender_verify_failure/$recipient_verify_failure to "random".
46 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
49 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
50 Previously this would segfault.
52 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
55 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
56 like zero, since the resolver should be doing this for us, But we need one
57 as a CNAME but no MX presence gets the CNAME returned; we need to check
58 that doesn't point to an MX to declare it "no MX returned" rather than
59 "error, loop". A new main option is added so the older capability of
60 following some limited number of chain links is maintained.
62 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
64 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
65 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
66 now-deprecated earlier definitions used only specified the range up to TLS
67 1.2 (in the older-version library docs).
73 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
74 When redis_servers is set to a list of > 1 element, and the Redis servers
75 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
76 case of MOVED into a DEFER case instead, thus moving the query onto the
77 next server in the list. For a cluster of N elements, all N servers must
78 be defined in redis_servers.
80 GF/02 Catch and remove uninitialized value warning in exiqsumm
81 Check for existence of @ARGV before looking at $ARGV[0]
83 JH/01 Replace the store_release() internal interface with store_newblock(),
84 which internalises the check required to safely use the old one, plus
85 the allocate and data copy operations duplicated in both (!) of the
88 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
89 modifier. This matches the restriction on the commandline.
91 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
92 Previously only the last row was returned.
94 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
95 we assumed that tags in the header were well-formed, and parsed the
96 element content after inspecting only the first char of the tag.
97 Assumptions at that stage could crash the receive process on malformed
100 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
101 While running the DKIM ACL we operate on the Permanent memory pool so that
102 variables created with "set" persist to the DATA ACL. Also (at any time)
103 DNS lookups that fail create cache records using the Permanent pool. But
104 expansions release any allocations made on the current pool - so a dnsdb
105 lookup expansion done in the DKIM ACL releases the memory used for the
106 DNS negative-cache, and bad things result. Solution is to switch to the
107 Main pool for expansions.
108 While we're in that code, add checks on the DNS cache during store_reset,
109 active in the testsuite.
110 Problem spotted, and debugging aided, by Wolfgang Breyha.
112 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
113 When none of the hosts presented to a transport match an already-open
114 connection, close it and proceed with the list. Previously we would
115 queue the message. Spotted by Lena with Yahoo, probably involving
118 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
119 Previously a spurious "250 OK id=" response was appended to the proper
122 JH/08 The "support for" informational output now, which built with Content
123 Scanning support, has a line for the malware scanner interfaces compiled
124 in. Interface can be individually included or not at build time.
126 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
127 by the template makefile "src/EDITME". The "STREAM" support for an older
128 ClamAV interface method is removed.
130 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
131 rows affected is given instead).
133 JH/11 The runtime Berkeley DB library version is now additionally output by
134 "exim -d -bV". Previously only the compile-time version was shown.
136 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
137 SMTP connection. Previously, when one had more receipients than the
138 first, an abortive onward connection was made. Move to full support for
139 multiple onward connections in sequence, handling cutthrough connection
140 for all multi-message initiating connections.
142 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
143 routers. Previously, a multi-recipient message would fail to match the
144 onward-connection opened for the first recipient, and cause its closure.
146 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
147 a timeout on read on a GnuTLS initiating connection, resulting in the
148 initiating connection being dropped. This mattered most when the callout
149 was marked defer_ok. Fix to keep the two timeout-detection methods
152 JH/15 Relax results from ACL control request to enable cutthrough, in
153 unsupported situations, from error to silently (except under debug)
154 ignoring. This covers use with PRDR, frozen messages, queue-only and
157 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
159 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
160 metadata, resulting in a crash in free().
162 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
163 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
164 Broken also in d185889f4, with init system revamp.
166 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
167 Previously we abruptly closed the connection after reading a malware-
168 found indication; now we go on to read the "scan ok" response line,
171 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
172 ACL. Previously, a crash would result.
174 JH/19 Speed up macro lookups during configuration file read, by skipping non-
175 macro text after a replacement (previously it was only once per line) and
176 by skipping builtin macros when searching for an uppercase lead character.
178 JH/20 DANE support moved from Experimental to mainline. The Makefile control
179 for the build is renamed.
181 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
182 was allocated for every new TLS startup, meaning one per message. Fix
183 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
185 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
186 reported the original. Fix to report (as far as possible) the ACL
187 result replacing the original.
189 JH/23 Fix memory leak during multi-message connections using STARTTLS under
190 OpenSSL. Certificate information is loaded for every new TLS startup,
191 and the resources needed to be freed.
193 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
195 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
198 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
199 DATA response info to the (existing) per-recipient response info for
200 the "C=" log element. It can have useful tracking info from the
201 destination system. Patch from Simon Arlott.
203 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
204 length value. Previously this would segfault.
206 HS/02 Support Avast multiline protoocol, this allows passing flags to
207 newer versions of the scanner.
209 JH/28 Ensure that variables possibly set during message acceptance are marked
210 dead before release of memory in the daemon loop. This stops complaints
211 about them when the debug_store option is enabled. Discovered specifically
212 for sender_rate_period, but applies to a whole set of variables.
213 Do the same for the queue-runner and queue-list loops, for variables set
214 from spool message files. Do the same for the SMTP per-message loop, for
215 certain variables indirectly set in ACL operations.
217 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
218 as a multi-recipient message from a mailinglist manager). The coding had
219 an arbitrary cutoff number of characters while checking for more input;
220 enforced by writing a NUL into the buffer. This corrupted long / fast
221 input. The problem was exposed more widely when more pipelineing of SMTP
222 responses was introduced, and one Exim system was feeding another.
223 The symptom is log complaints of SMTP syntax error (NUL chars) on the
224 receiving system, and refused recipients seen by the sending system
225 (propating to people being dropped from mailing lists).
226 Discovered and pinpointed by David Carter.
228 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
229 replaced by the ${authresults } expansion.
231 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
233 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
234 allows proper process termination in container environments.
236 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
237 Previously the "final dot" had a newline after it; ensure it is CR,LF.
239 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
240 and "err_perm", deprecated since 4.83 when the RFC-defined words
241 "temperror" and "permerror" were introduced.
243 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
244 transport-filters or DKIM-signing. The restriction was lost in the
245 consolidation of verify-callout and delivery SMTP handling.
246 Extend the restriction to also cover ARC-signing.
248 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
249 in defer=pass mode supply a 450 to the initiator. Previously the message
252 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
253 tls_require_ciphers is used as before.
255 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
256 "pass_unscanned". Only tmpfails from the scanner are written to
257 the paniclog, as they may require admin intervention (permission
258 denied, license issues). Other scanner errors (like decompression
259 bombs) do not cause a paniclog entry.
261 JH/36 Fix reinitialisation of DKIM logging variable between messages.
262 Previously it was possible to log spurious information in receive log
265 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
266 triggered odd behaviour from Outlook Express clients.
268 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
271 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
272 since the IETF WG has not yet settled on that versus the original
273 "bare" representation.
275 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
276 Previously the millisecond value corrupted the output.
277 Fix also for syslog_pid=no and log_selector +pid, for which the pid
278 corrupted the output.
284 JH/01 Rework error string handling in TLS interface so that the caller in
285 more cases is responsible for logging. This permits library-sourced
286 string to be attached to addresses during delivery, and collapses
287 pairs of long lines into single ones.
289 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
290 during configuration. Wildcards are allowed and expanded.
292 JH/02 Rework error string handling in DKIM to pass more info back to callers.
293 This permits better logging.
295 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
296 do not close it down and have the child transport start it up again on
297 the passed-on TCP connection. Instead, proxy the child (and any
298 subsequent ones) for TLS via a unix-domain socket channel. Logging is
299 affected: the continued delivery log lines do not have any DNSSEC, TLS
300 Certificate or OCSP information. TLS cipher information is still logged.
302 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
303 identical IP addresses on different listening ports. Will also affect
306 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
307 add noisy ifdef guards to special-case this sillyness.
308 Patch from Bernd Kuhls.
310 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
311 than 255 are no longer allowed.
313 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
314 Disable the session-cache too, which might reduce our load. Since we
315 currrectly use a new context for every connection, both as server and
316 client, there is no benefit for these.
317 GnuTLS appears to not support tickets server-side by default (we don't
318 call gnutls_session_ticket_enable_server()) but client side is enabled
319 by default on recent versions (3.1.3 +) unless the PFS priority string
322 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
323 <https://reproducible-builds.org/specs/source-date-epoch/>.
325 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
326 the check for any unsuccessful recipients did not notice the limit, and
327 erroneously found still-pending ones.
329 JH/08 Pipeline CHUNKING command and data together, on kernels that support
330 MSG_MORE. Only in-clear (not on TLS connections).
332 JH/09 Avoid using a temporary file during transport using dkim. Unless a
333 transport-filter is involved we can buffer the headers in memory for
334 creating the signature, and read the spool data file once for the
335 signature and again for transmission.
337 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
338 4.77 as the kernel support then wasn't solid, having issues in 64bit
339 mode. Now, it's been long enough. Add support for FreeBSD also.
341 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
342 case where the routing stage had gathered several addresses to send to
343 a host before calling the transport for the first, we previously failed
344 to close down TLS in the old transport process before passing the TCP
345 connection to the new process. The new one sent a STARTTLS command
346 which naturally failed, giving a failed delivery and bloating the retry
347 database. Investigation and fix prototype from Wolfgang Breyha.
349 JH/12 Fix check on SMTP command input synchronisation. Previously there were
350 false-negatives in the check that the sender had not preempted a response
351 or prompt from Exim (running as a server), due to that code's lack of
352 awareness of the SMTP input buffering.
354 PP/04 Add commandline_checks_require_admin option.
355 Exim drops privileges sanely, various checks such as -be aren't a
356 security problem, as long as you trust local users with access to their
357 own account. When invoked by services which pass untrusted data to
358 Exim, this might be an issue. Set this option in main configuration
359 AND make fixes to the calling application, such as using `--` to stop
362 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
363 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
364 responses to those, into a single TLS record each way (this usually means
365 a single packet). As a side issue, smtp_enforce_sync now works on TLS
368 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
369 affects you only if you're dancing at the edge of the param size limits.
370 If you are, and this message makes sense to you, then: raise the
371 configured limit or use OpenSSL 1.1. Nothing we can do for older
374 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
375 cmdline element to get the documented default one. Previously it was
378 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
379 are unsuable for non-message-specific reasons - eg. connection timeout,
380 banner-time rejection.
382 JH/16 Fix logging of delivery remote port, when specified by router, under
385 PP/06 Repair manualroute's ability to take options in any order, even if one
386 is the name of a transport.
389 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
391 JH/17 Change the list-building routines interface to use the expanding-string
392 triplet model, for better allocation and copying behaviour.
394 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
395 Previously it was constructed the first time a possibly-matching string
396 was met in the configuration file input during startup; now it is done
399 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
400 compatible one, to avoid the (poorly documented) possibility of a config
401 file in the working directory redirecting the DB files, possibly correpting
402 some existing file. CVE-2017-10140 assigned for BDB.
404 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
405 cache-hot. Previously, although the result was properly cached, the
406 initial verify call returned a defer.
408 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
409 the main verify for receipient in uncached-mode.
411 JH/22 Retire historical build files to an "unsupported" subdir. These are
412 defined as "ones for which we have no current evidence of testing".
414 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
415 if present. Previously it was ignored.
417 JH/24 Start using specified-initialisers in C structure init coding. This is
418 a C99 feature (it's 2017, so now considered safe).
420 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
421 if was a fixed-sized field and bitmask ops via macros; it is now more
424 PP/07 GitHub PR 56: Apply MariaDB build fix.
425 Patch provided by Jaroslav Škarvada.
427 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
428 during Coverity cleanups [4.87 JH/47]
429 Diagnosis and fix provided by Michael Fischer v. Mollard.
431 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
432 the right size to place the terminating semicolon on its own folded
433 line, the header hash was calculated to an incorrect value thanks to
434 the (relaxed) space the fold became.
436 HS/02 Fix Bug 2130: large writes from the transport subprocess where chunked
437 and confused the parent.
439 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
440 which could crash as a result. This could lead to undeliverable messages.
442 JH/28 Logging: "next input sent too soon" now shows where input was truncated
445 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
446 matters on fast-turnover and PID-randomising systems, which were getting
447 out-of-order delivery.
449 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
450 a possibly-overlapping copy. The symptom was that "Remote host closed
451 connection in response to HELO" was logged instead of the actual 4xx
454 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
455 Previously only that bufferd was discarded, resulting in SYMTP command
458 JH/32 DKIM: when a message has multiple signatures matching an identity given
459 in dkim_verify_signers, run the dkim acl once for each. Previously only
460 one run was done. Bug 2189.
462 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
463 "panic the current process" to "deliberately defer". The panic log is
464 still written with the problem list name; the mail and reject logs now
465 get a temp-reject line for the message that was being handled, saying
466 something like "domains check lookup or other defer". The SMTP 451
467 message is still "Temporary local problem".
469 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
470 A crafted sequence of BDAT commands could result in in-use memory beeing
471 freed. CVE-2017-16943.
473 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
474 from SMTP input. Previously it was always done; now only done for DATA
475 and not BDAT commands. CVE-2017-16944.
477 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
478 to the message (such as an overlong header line). Previously this was
479 not done and we did not exit BDAT mode. Followon from the previous item
480 though a different problem.
486 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
487 than -2003 did; needs libidn2 in addition to libidn.
489 JH/02 The path option on a pipe transport is now expanded before use.
491 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
492 Patch provided by "Björn", documentation fix added too.
494 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
495 missing a wire-to-host endian conversion.
497 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
498 close after a BDAT command line could be taken as a following command,
499 giving a synch failure. Fix by only checking for synch immediately
500 before acknowledging the chunk.
502 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
503 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
504 macro. Patches provided by Josh Soref.
506 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
507 Previously we did not; the RFC seems ambiguous and VRFY is not listed
508 by IANA as a service extension. However, John Klensin suggests that we
511 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
512 the dkim code may be unix-mode line endings rather than smtp wire-format
513 CRLF, so prepend a CR to any bare LF.
515 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
516 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
518 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
519 the first were themselves being wrongly included in the feed into dkim
520 processing; with most chunk sizes in use this resulted in an incorrect
521 body hash calculated value.
523 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
524 DKIM signature block, for verification. Although advised against by
525 standards it is specifically not ruled illegal.
527 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
529 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
530 missing a body hash (the bh= tag).
532 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
533 It seems that HAProxy sends the Proxy Protocol information in clear and
534 only then does a TLS startup, so do the same.
536 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
537 TCP connections (such as for Spamd) unless the daemon successfully set
538 Fast Open mode on its listening sockets. This fixes breakage seen on
539 too-old kernels or those not configured for Fast Open, at the cost of
540 requiring both directions being enabled for TFO, and TFO never being used
541 by non-daemon-related Exim processes.
543 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
544 endings, at least on the first header line. Try to canonify any that get
545 past that check, despite the cost.
547 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
548 now limited to an arbitrary five deep, while parsing addresses with the
549 strip_excess_angle_brackets option enabled.
551 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
552 instead leave the unprompted TLS handshake in socket buffer for the
553 TLS library to consume.
555 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
557 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
559 JH/16 Drop variables when they go out of scope. Memory management drops a whole
560 region in one operation, for speed, and this leaves assigned pointers
561 dangling. Add checks run only under the testsuite which checks all
562 variables at a store-reset and panics on a dangling pointer; add code
563 explicitly nulling out all the variables discovered. Fixes one known
564 bug: a transport crash, where a dangling pointer for $sending_ip_address
565 originally assigned in a verify callout, is re-used.
567 PP/06 Drop '.' from @INC in various Perl scripts.
569 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
571 PP/08 Reduce a number of compilation warnings under clang; building with
572 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
573 should be warning-free.
575 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
577 HS/01 Fix portability problems introduced by PP/08 for platforms where
578 realloc(NULL) is not equivalent to malloc() [SunOS et al].
580 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
581 chunk. This allows us to accept broken chunked messages. We need a more
582 general solution here.
584 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
585 already-broken messages in the queue.
587 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
589 JH/19 Fix reference counting bug in routing-generated-address tracking.
595 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
596 supports it and a size is available (ie. the sending peer gave us one).
598 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
599 years of being deprecated). The replacements are the ACLs
600 acl_smtp_mime and acl_not_smtp_mime.
602 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
603 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
604 or even an in-clear connection were permitted. Now, if the host lookup
605 was dnssec and dane was requested then the host is only used if the
606 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
607 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
608 if one fails this test.
609 This means that a poorly-configured remote DNS will make it incommunicado;
610 but it protects against a DNS-interception attack on it.
612 JH/04 Bug 1810: make continued-use of an open smtp transport connection
613 non-noisy when a race steals the message being considered.
615 JH/05 If main configuration option tls_certificate is unset, generate a
616 self-signed certificate for inbound TLS connections.
618 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
619 in rewrites and routers.
621 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
622 and logged a warning sing 4.83; now they are a configuration file error.
624 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
625 (lacking @domain). Apply the same qualification processing as RCPT.
627 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
629 JH/10 Support ${sha256:} applied to a string (as well as the previous
632 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
633 a cutthrough deliver is pending, as we always want to make a connection.
634 This also avoids re-routing the message when later placing the cutthrough
635 connection after a verify cache hit.
636 Do not update it with the verify result either.
638 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
639 when routing results in more than one destination address.
641 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
642 signing (which inhibits the cutthrough capability). Previously only
643 the presence of an option was tested; now an expansion evaluating as
644 empty is permissible (obviously it should depend only on data available
645 when the cutthrough connection is made).
647 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
648 the relevant preceding SMTP command did not note the pipelining mode.
650 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
651 Previously they were not counted.
653 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
654 as one having no matching records. Previously we deferred the message
655 that needed the lookup.
657 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
658 distinguished as "(=".
660 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
661 for missing MX records. Previously it only worked for missing A records.
663 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
665 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
666 after the data-go-ahead and data-ack. Patch from Jason Betts.
668 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
669 even for a "none" policy. Patch from Tony Meyer.
671 JH/22 Fix continued use of a connection for further deliveries. If a port was
672 specified by a router, it must also match for the delivery to be
675 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
676 When one of the recipients of a message was unsuitable for the connection
677 (has no matching addresses), we lost track of needing to mark it
678 deferred. As a result mail would be lost.
680 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
682 JH/25 Decoding ACL controls is now done using a binary search; the source code
683 takes up less space and should be simpler to maintain. Merge the ACL
684 condition decode tables also, with similar effect.
686 JH/26 Fix problem with one_time used on a redirect router which returned the
687 parent address unchanged. A retry would see the parent address marked as
688 delivered, so not attempt the (identical) child. As a result mail would
691 JH/27 Fix a possible security hole, wherein a process operating with the Exim
692 UID can gain a root shell. Credit to http://www.halfdog.net/ for
693 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
696 JH/28 Enable {spool,log} filesystem space and inode checks as default.
697 Main config options check_{log,spool}_{inodes,space} are now
698 100 inodes, 10MB unless set otherwise in the configuration.
700 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
701 Previously it only applied to the main-section connection policy
704 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
706 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
707 by me. Added RFC7919 DH primes as an alternative.
709 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
710 are not in the system include path.
712 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
713 GnuTLS, when a session startup failed (eg because the client disconnected)
714 Exim did stdio operations after fclose. This was exposed by a recent
715 change which nulled out the file handle after the fclose.
717 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
718 signed directly by the cert-signing cert, rather than an intermediate
719 OCSP-signing cert. This is the model used by LetsEncrypt.
721 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
723 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
724 an incoming connection.
726 HS/02 Bug 1802: Do not half-close the connection after sending a request
729 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
730 fallback to "prime256v1".
732 JH/34 SECURITY: Use proper copy of DATA command in error message.
733 Could leak key material. Remotely exploitable. CVE-2016-9963.
739 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
740 and 3.4.4 - once the server is enabled to respond to an OCSP request
741 it does even when not requested, resulting in a stapling non-aware
742 client dropping the TLS connection.
744 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
745 support variable-length bit vectors. No functional change.
747 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
748 The I= interface field on outgoing lines is now after the H= remote
749 host field, same as incoming lines. There is a separate
750 outgoing_interface log selector which allows you to disable the
753 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
754 If not running log_selector +smtp_connection the mainlog would be held
755 open indefinitely after a "too many connections" event, including to a
756 deleted file after a log rotate. Leave the per net connection logging
757 leaving it open for efficiency as that will be quickly detected by the
758 check on the next write.
760 HS/01 Bug 1671: Fix post transport crash.
761 Processing the wait-<transport> messages could crash the delivery
762 process if the message IDs didn't exist for some reason. When
763 using 'split_spool_directory=yes' the construction of the spool
764 file name failed already, exposing the same netto behaviour.
766 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
767 mime_regex ACL conditions.
769 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
770 to DSN fail messages (bounces): remote IP, remote greeting, remote response
771 to HELO, local diagnostic string.
773 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
774 log line to debug. Even when configured with a tls authenticator many
775 client connections are expected to not authenticate in this way, so
776 an authenticate fail is not an error.
778 HS/02 Add the Exim version string to the process info. This way exiwhat
779 gives some more detail about the running daemon.
781 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
782 matter for fast-change records such as DNSBLs.
784 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
785 retry record, even if constant. There may be multiple transports with
786 different interface settings and the retry behaviour needs to be kept
789 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
791 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
793 JH/10 Bug 840: fix log_defer_output option of pipe transport
795 JH/11 Bug 830: use same host for all RCPTS of a message, even under
796 hosts_randomize. This matters a lot when combined with mua_wrapper.
798 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
799 ${quote_pgsql:<string>} operator.
801 JH/13 Bug 1708: avoid misaligned access in cached lookup.
803 JH/14 Change header file name for freeradius-client. Relevant if compiling
804 with Radius support; from the Gentoo tree and checked under Fedora.
806 JH/15 Bug 1712: Introduce $prdr_requested flag variable
808 JH/16 Bug 1714: Permit an empty string as expansion result for transport
809 option transport_filter, meaning no filtering.
811 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
813 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
814 defaults to "*" (all hosts). The variable is now available when not built
815 with TLS, default unset, mainly to enable keeping the testsuite sane.
816 If a server certificate is not supplied (via tls_certificate) an error is
817 logged, and clients will find TLS connections fail on startup. Presumably
818 they will retry in-clear.
819 Packagers of Exim are strongly encouraged to create a server certificate
820 at installation time.
822 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
823 with the $config_file variable.
825 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
826 in transport context, after the attempt, and per-recipient. The latter type
827 is per host attempted. The event data is the error message, and the errno
828 information encodes the lookup type (A vs. MX) used for the (first) host,
829 and the trailing two digits of the smtp 4xx response.
831 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
832 to write to mainlog (or rejectlog, paniclog) in the window between file
833 creation and permissions/ownership being changed. Particularly affects
834 installations where exicyclog is run as root, rather than exim user;
835 result is that the running daemon panics and dies.
837 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
839 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
840 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
841 "pri" and "weight". Note that the previous implicit priority given by the
842 list order is no longer honoured.
844 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
847 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
848 by defining SUPPORT_SOCKS.
850 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
851 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
852 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
853 variables are renamed to proxy_{local,external}_{address,port}.
855 JH/27 Move Internationalisation support from Experimental to mainline, enabled
856 for a build by defining SUPPORT_I18N
858 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
859 of the query string, and make ${quote_redis:} do that quoting.
861 JH/29 Move Events support from Experimental to mainline, enabled by default
862 and removable for a build by defining DISABLE_EVENT.
864 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
866 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
867 cached by the daemon.
869 JH/32 Move Redis support from Experimental to mainline, enabled for a build
870 by defining LOOKUP_REDIS. The libhiredis library is required.
872 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
873 keys are given for lookup.
875 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
876 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
877 only supported when built with TLS support. The PolarSSL SHA routines
878 are still used when the TLS library is too old for convenient support.
880 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
881 openssl_options), for security. OpenSSL forces this from version 1.1.0
882 server-side so match that on older versions.
884 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
885 allocation for $value could be released as the expansion processing
886 concluded, but leaving the global pointer active for it.
888 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
889 and to use the domains and local_parts ACL conditions.
891 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
892 incorrectly not doubled on cutthrough transmission, hence seen as a
893 body-termination at the receiving system - resulting in truncated mails.
894 Commonly the sender saw a TCP-level error, and retransmitted the message
895 via the normal store-and-forward channel. This could result in duplicates
896 received - but deduplicating mailstores were liable to retain only the
897 initial truncated version.
899 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
901 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
903 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
904 we're in there, support oversigning also; bug 1309.
906 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
908 HS/04 Add support for keep_environment and add_environment options.
910 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
911 either intentional arithmetic overflow during PRNG, or testing config-
914 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
915 delivery resulted in actual delivery. Cancel cutthrough before DATA
918 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
919 rejects a recipient: pass the reject to the originator.
921 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
922 Many were false-positives and ignorable, but it's worth fixing the
925 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
926 for the new environment-manipulation done at startup. Move the routines
927 from being local to tls.c to being global via the os.c file.
929 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
930 an extract embedded as result-arg for a map, the first arg for extract
931 is unavailable so we cannot tell if this is a numbered or keyed
932 extraction. Accept either.
938 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
941 JH/02 The smtp transport option "multi_domain" is now expanded.
943 JH/03 The smtp transport now requests PRDR by default, if the server offers
946 JH/04 Certificate name checking on server certificates, when exim is a client,
947 is now done by default. The transport option tls_verify_cert_hostnames
948 can be used to disable this per-host. The build option
949 EXPERIMENTAL_CERTNAMES is withdrawn.
951 JH/05 The value of the tls_verify_certificates smtp transport and main options
952 default to the word "system" to access the system default CA bundle.
953 For GnuTLS, only version 3.0.20 or later.
955 JH/06 Verification of the server certificate for a TLS connection is now tried
956 (but not required) by default. The verification status is now logged by
957 default, for both outbound TLS and client-certificate supplying inbound
960 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
963 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
964 Status Notification (bounce) messages are now MIME format per RFC 3464.
965 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
966 under the control of the dsn_advertise_hosts option, and routers may
967 have a dsn_lasthop option.
969 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
970 default, modifiable by a malware= option. The list separator for
971 the options can now be changed in the usual way. Bug 68.
973 JH/10 The smtp_receive_timeout main option is now expanded before use.
975 JH/11 The incoming_interface log option now also enables logging of the
976 local interface on delivery outgoing connections.
978 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
979 if the interface and destination host and port all match.
981 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
984 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
985 Patch from Andrew Lewis.
987 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
988 now supports optional time-restrictions, weighting, and priority
989 modifiers per server. Patch originally by <rommer@active.by>.
991 JH/16 The spamd_address main option now supports a mixed list of local
992 and remote servers. Remote servers can be IPv6 addresses, and
993 specify a port-range.
995 JH/17 Bug 68: The spamd_address main option now supports an optional
996 timeout value per server.
998 JH/18 Bug 1581: Router and transport options headers_add/remove can
999 now have the list separator specified.
1001 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1004 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1007 JH/21 Support for the A6 type of dns record is withdrawn.
1009 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1010 rather than the verbs used.
1012 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1013 from 255 to 1024 chars.
1015 JH/24 Verification callouts now attempt to use TLS by default.
1017 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1018 are generic router options now. The defaults didn't change.
1020 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1021 Original patch from Alexander Shikoff, worked over by JH.
1023 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1024 files if ZCAT_COMMAND is not executable.
1026 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1028 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1030 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1031 Normally benign, it bites when the pair was led to by a CNAME;
1032 modern usage is to not canonicalize the domain to a CNAME target
1033 (and we were inconsistent anyway for A-only vs AAAA+A).
1035 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1037 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1038 when evaluating $sender_host_dnssec.
1040 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1041 $sender_helo_dnssec variable.
1043 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1045 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1047 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1049 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1050 documented as working, but never had. Support all but $spam_report.
1052 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1053 added for tls authenticator.
1055 HS/03 Add perl_taintmode main config option
1061 TL/01 When running the test suite, the README says that variables such as
1062 no_msglog_check are global and can be placed anywhere in a specific
1063 test's script, however it was observed that placement needed to be near
1064 the beginning for it to behave that way. Changed the runtest perl
1065 script to read through the entire script once to detect and set these
1066 variables, reset to the beginning of the script, and then run through
1067 the script parsing/test process like normal.
1069 TL/02 The BSD's have an arc4random API. One of the functions to induce
1070 adding randomness was arc4random_stir(), but it has been removed in
1071 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1072 function when detected.
1074 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1075 cause callback expansion.
1077 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1078 syntax errors in an expansion can be treated as a string instead of
1079 logging or causing an error, due to the internal use of bool_lax
1080 instead of bool when processing it.
1082 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1083 server certificates when making smtp deliveries.
1085 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1087 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1089 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1091 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1092 Merged patch from Sebastian Wiedenroth.
1094 JH/05 Fix results-pipe from transport process. Several recipients, combined
1095 with certificate use, exposed issues where response data items split
1096 over buffer boundaries were not parsed properly. This eventually
1097 resulted in duplicates being sent. This issue only became common enough
1098 to notice due to the introduction of connection certificate information,
1099 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1101 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1102 size buffer was used, resulting in syntax errors when an expansion
1105 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1106 version 3.3.6 or later.
1108 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1109 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1110 both become "event_action", the variables become $event_name, $event_data
1111 and $event_defer_errno. There is a new variable $verify_mode, usable in
1112 routers, transports and related events. The tls:cert event is now also
1113 raised for inbound connections, if the main configuration event_action
1116 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1117 early OCSP support, but no stapling (appears to be less than 1.0.0).
1119 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1120 server certificate names available under the smtp transport option
1121 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1124 JH/10 Time-related extraction expansions from certificates now use the main
1125 option "timezone" setting for output formatting, and are consistent
1126 between OpenSSL and GnuTLS compilations. Bug 1541.
1128 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1129 encoded parameter in the incoming message. Bug 1558.
1131 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1132 include certificate info, eximon was claiming there were spoolfile
1135 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1137 JH/14 Log delivery-related information more consistently, using the sequence
1138 "H=<name> [<ip>]" wherever possible.
1140 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1141 are problematic for Debian distribution, omit them from the release
1144 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1146 JH/16 Fix string representation of time values on 64bit time_t architectures.
1149 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1150 output list separator was used.
1155 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1156 checkers that were complaining about end of non-void function with no
1159 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1160 This was a regression introduced in 4.83 by another bugfix.
1162 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1164 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1165 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1171 TF/01 Correctly close the server side of TLS when forking for delivery.
1173 When a message was received over SMTP with TLS, Exim failed to clear up
1174 the incoming connection properly after forking off the child process to
1175 deliver the message. In some situations the subsequent outgoing
1176 delivery connection happened to have the same fd number as the incoming
1177 connection previously had. Exim would try to use TLS and fail, logging
1178 a "Bad file descriptor" error.
1180 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1181 utilities have not been installed.
1183 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1184 temporary space as the ACL may create new global variables.
1186 TL/01 LDAP support uses per connection or global context settings, depending
1187 upon the detected version of the libraries at build time.
1189 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1190 to extract and use the src ip:port in logging and expansions as if it
1191 were a direct connection from the outside internet. PPv2 support was
1192 updated based on HAProxy spec change in May 2014.
1194 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1196 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1197 Properly escape header and check for NULL return.
1199 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1202 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1204 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1205 characters in header names, implemented as a verify condition.
1206 Contributed by Michael Fischer v. Mollard.
1208 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1209 results permerror and temperror. Previous values are deprecated but
1210 still accepted. In a future release, err_perm and err_temp will be
1211 completely removed, which will be a backward incompatibility if the
1212 ACL tests for either of these two old results. Patch contributed by
1213 user bes-internal on the mailing list.
1215 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1217 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1218 selectors, in both main and reject logs.
1220 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1223 JH/07 Add malware type "sock" for talking to simple daemon.
1225 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1227 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1228 routers/transports under cutthrough routing.
1230 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1231 numbers. Touch up "bool" conditional to keep the same definition.
1233 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1235 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1237 JH/12 Expand items in router/transport headers_add or headers_remove lists
1238 individually rather than the list as a whole. Bug 1452.
1240 Required for reasonable handling of multiple headers_ options when
1241 they may be empty; requires that headers_remove items with embedded
1242 colons must have them doubled (or the list-separator changed).
1244 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1245 view the policy declared in the DMARC record. Currently, $dmarc_status
1246 is a combined value of both the record presence and the result of the
1249 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1251 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1252 dnslookup router and the smtp transport (applying to the forward
1255 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1256 of ldap servers used for a specific lookup. Patch provided by Heiko
1259 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1260 New variable $lookup_dnssec_authenticated for observability.
1262 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1263 Patch submitted by Lars Timman.
1265 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1267 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1268 Requires trusted mode and valid format message id, aborts otherwise.
1269 Patch contributed by Heiko Schlichting.
1271 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1272 certextract with support for various fields. Bug 1358.
1274 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1275 is requested by default, modifiable by smtp transport option
1278 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1279 operate on certificate variables to give certificate fingerprints
1280 Also new ${sha256:cert_variable}.
1282 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1284 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1285 Christian Aistleitner.
1287 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1289 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1290 file. Patch from Wolfgang Breyha.
1292 JH/25 Expand the coverage of the delivery $host and $host_address to
1293 client authenticators run in verify callout. Bug 1476.
1295 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1296 align with daemon_smtp_ports. Bug 72.
1298 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1299 support and error reporting did not work properly.
1301 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1302 and is readable. Patch from Andrew Colin Kissa.
1304 TL/14 Enhance documentation of ${run expansion and how it parses the
1305 commandline after expansion, particularly in the case when an
1306 unquoted variable expansion results in an empty value.
1308 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1310 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1311 by renaming away from it. Addresses GH issue 15, reported by
1314 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1316 TL/15 SECURITY: prevent double expansion in math comparison functions
1317 (can expand unsanitized data). Not remotely exploitable.
1324 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1326 PP/02 Make -n do something, by making it not do something.
1327 When combined with -bP, the name of an option is not output.
1329 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1332 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1333 $sender_host_name and config options to manage this, and basic check
1336 PP/05 DSCP support for outbound connections and control modifier for inbound.
1338 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1339 (Only plugin which currently uses this is kerberos4, which nobody should
1340 be using, but we should make it available and other future plugins might
1341 conceivably use it, even though it would break NAT; stuff *should* be
1342 using channel bindings instead).
1344 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1345 name; added for Sendmail compatibility; requires admin caller.
1346 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1347 just ignore it); requires trusted caller.
1348 Also parse but ignore: -Ac -Am -X<logfile>
1351 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1353 TL/02 Add +smtp_confirmation as a default logging option.
1355 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1356 Patch by Magnus Holmgren from 2007-02-20.
1358 TL/04 Bugzilla 1281 - Spec typo.
1359 Bugzilla 1283 - Spec typo.
1360 Bugzilla 1290 - Spec grammar fixes.
1362 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1364 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1366 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1367 mailing list by by Dmitry Isaikin.
1369 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1371 JH/02 Support "G" suffix to numbers in ${if comparisons.
1373 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1375 NM/01 Bugzilla 1197 - Spec typo
1376 Bugzilla 1196 - Spec examples corrections
1378 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1380 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1381 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1384 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1385 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1387 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1388 "acl {{name}{arg}...}", and optional args on acl condition
1391 JH/05 Permit multiple router/transport headers_add/remove lines.
1393 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1395 JH/07 Avoid using a waiting database for a single-message-only transport.
1396 Performance patch from Paul Fisher. Bugzilla 1262.
1398 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1401 JH/09 Add $headers_added variable, with content from use of ACL modifier
1402 add_header (but not yet added to the message). Bugzilla 199.
1404 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1405 Pulled from Bugzilla 817 by Wolfgang Breyha.
1407 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1409 (nb: this is the same fix as in Exim 4.80.1)
1411 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1414 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1417 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1419 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1420 advertise SMTP AUTH mechanism to us, instead of a generic
1421 protocol violation error. Also, make Exim more robust to bad
1422 data from the Dovecot auth socket.
1424 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1426 When a queue runner is handling a message, Exim first routes the
1427 recipient addresses, during which it prunes them based on the retry
1428 hints database. After that it attempts to deliver the message to
1429 any remaining recipients. It then updates the hints database using
1432 So if a recipient address works intermittently, it can get repeatedly
1433 deferred at routing time. The retry hints record remains fresh so the
1434 address never reaches the final cutoff time.
1436 This is a fairly common occurrence when a user is bumping up against
1437 their storage quota. Exim had some logic in its local delivery code
1438 to deal with this. However it did not apply to per-recipient defers
1439 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1441 This change adds a proper retry rule check during routing so that the
1442 final cutoff time is checked against the message's age. We only do
1443 this check if there is an address retry record and there is not a
1444 domain retry record; this implies that previous attempts to handle
1445 the address had the retry_use_local_parts option turned on. We use
1446 this as an approximation for the destination being like a local
1447 delivery, as in LMTP.
1449 I suspect this new check makes the old local delivery cutoff check
1450 redundant, but I have not verified this so I left the code in place.
1452 TF/02 Correct gecos expansion when From: is a prefix of the username.
1454 Test 0254 submits a message to Exim with the header
1458 When I ran the test suite under the user fanf2, Exim expanded
1459 the header to contain my full name, whereas it should have added
1460 a Resent-Sender: header. It erroneously treats any prefix of the
1461 username as equal to the username.
1463 This change corrects that bug.
1465 GF/01 DCC debug and logging tidyup
1466 Error conditions log to paniclog rather than rejectlog.
1467 Debug lines prefixed by "DCC: " to remove any ambiguity.
1469 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1471 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1472 Bug spotted by Jeremy Harris; was flawed since initial commit.
1473 Would have resulted in OCSP responses post-SNI triggering an Exim
1474 NULL dereference and crash.
1476 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1478 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1479 Bug detection, analysis and fix by Samuel Thibault.
1480 Bugzilla 1331, Debian bug #698092.
1482 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1484 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1485 Server implementation by Todd Lyons, client by JH.
1486 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1487 config variable "prdr_enable" controls whether the server
1488 advertises the facility. If the client requests PRDR a new
1489 acl_data_smtp_prdr ACL is called once for each recipient, after
1490 the body content is received and before the acl_smtp_data ACL.
1491 The client is controlled by both of: a hosts_try_prdr option
1492 on the smtp transport, and the server advertisement.
1493 Default client logging of deliveries and rejections involving
1494 PRDR are flagged with the string "PRDR".
1496 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1497 fclose(). Diagnosis by Todd Lyons.
1499 PP/17 Update configure.default to handle IPv6 localhost better.
1500 Patch by Alain Williams (plus minor tweaks).
1503 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1504 This is now consistent with GnuTLS, and is now documented: the
1505 previous undocumented portable approach to treating the option as
1506 unset was to force an expansion failure. That still works, and
1507 an empty string is now equivalent.
1509 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1510 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1511 not performing validation itself.
1513 PP/20 Added force_command boolean option to pipe transport.
1514 Patch from Nick Koston, of cPanel Inc.
1516 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1519 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1521 PP/21 Fix eximon continuous updating with timestamped log-files.
1522 Broken in a format-string cleanup in 4.80, missed when I repaired the
1523 other false fix of the same issue.
1524 Report and fix from Heiko Schlichting.
1527 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1528 Report from Prashanth Katuri.
1530 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1531 It's SecureTransport, so affects any MacOS clients which use the
1532 system-integrated TLS libraries, including email clients.
1534 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1535 using a MIME ACL for non-SMTP local injection.
1536 Report and assistance in diagnosis by Warren Baker.
1538 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1540 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1542 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1543 last id that failed so it may be referenced in subsequent ACL's.
1545 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1548 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1549 ldap library initialization, allowing self-signed CA's to be
1550 used. Also properly sets require_cert option later in code by
1551 using NULL (global ldap config) instead of ldap handle (per
1552 session). Bug diagnosis and testing by alxgomz.
1554 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1555 the src/util/ subdirectory.
1557 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1558 renamed to Transport Post Delivery Action by Jeremy Harris, as
1561 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1562 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1563 redis_servers = needs to be configured which will be used by the redis
1564 lookup. Patch from Warren Baker, of The Packet Hub.
1566 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1568 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1569 hostname or reverse DNS when processing a host list. Used suggestions
1570 from multiple comments on this bug.
1572 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1574 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1575 Missed a few lines, added it to make the runtest require no keyboard
1578 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1579 contains upper case chars. Make router use caseful_local_part.
1581 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1582 support when GnuTLS has been built with p11-kit.
1588 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1590 This, or similar/improved, will also be change PP/11 of 4.82.
1596 PP/01 Handle short writes when writing local log-files.
1597 In practice, only affects FreeBSD (8 onwards).
1598 Bugzilla 1053, with thanks to Dmitry Isaikin.
1600 NM/01 Bugzilla 949 - Documentation tweak
1602 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1605 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1607 PP/02 Implemented gsasl authenticator.
1609 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1611 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1612 `pkg-config foo` for cflags/libs.
1614 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1615 with rest of GSASL and with heimdal_gssapi.
1617 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1618 `pkg-config foo` for cflags/libs for the TLS implementation.
1620 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1621 properties get this fed in as external SSF. A number of robustness
1622 and debugging improvements to the cyrus_sasl authenticator.
1624 PP/08 cyrus_sasl server now expands the server_realm option.
1626 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1627 Patch by Jeremy Harris.
1629 PP/10 Added dbmjz lookup type.
1631 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1633 PP/12 MAIL args handles TAB as well as SP, for better interop with
1634 non-compliant senders.
1635 Analysis and variant patch by Todd Lyons.
1637 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1638 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1639 Patch from Dirk Mueller <dmueller@suse.com>
1641 PP/13 tls_peerdn now print-escaped for spool files.
1642 Observed some $tls_peerdn in wild which contained \n, which resulted
1643 in spool file corruption.
1645 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1646 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1647 or write after TLS renegotiation, which otherwise led to messages
1650 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1651 as a tracking header (ie: a signed header comes before the signature).
1652 Patch from Wolfgang Breyha.
1654 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1655 comma-sep list; embedded commas doubled.
1657 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1659 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1661 Report and patch from Dmitry Banschikov.
1663 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1664 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1665 failures. We appear to now support TLS1.1+ with Exim.
1667 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1668 lets Exim select keys and certificates based upon TLS SNI from client.
1669 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1670 before an outbound SMTP session. New log_selector, +tls_sni.
1672 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1673 NULL dereference. Report and patch from Alun Jones.
1675 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1676 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1677 Not seeing resolver debug output on NetBSD, but suspect this is a
1678 resolver implementation change.
1680 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1681 Left warnings. Added "eximon gdb" invocation mode.
1683 PP/21 Defaulting "accept_8bitmime" to true, not false.
1685 PP/22 Added -bw for inetd wait mode support.
1687 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1688 locate the relevant includes and libraries. Made this the default.
1690 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1691 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1693 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1694 This may cause build issues on older platforms.
1696 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1697 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1698 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1699 Added SNI support via GnuTLS too.
1700 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1702 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1704 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1705 Applied second patch from Janne, implementing suggestion to default
1706 multiple-strings-in-record handling to match SPF spec.
1708 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1710 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1711 read-only, out of scope).
1712 Patch from Wolfgang Breyha, report from Stuart Northfield.
1714 PP/29 Fix three issues highlighted by clang analyser static analysis.
1715 Only crash-plausible issue would require the Cambridge-specific
1716 iplookup router and a misconfiguration.
1717 Report from Marcin Mirosław.
1719 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1721 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1722 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1723 As part of this, removing so much warning spew let me fix some minor
1724 real issues in debug logging.
1726 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1727 assignment on my part. Fixed.
1729 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1730 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1731 Janne Snabb (who went above and beyond: thank you).
1733 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1734 string otherwise requires a connection and a bunch more work and it's
1735 relatively easy to get wrong. Should also expose TLS library linkage
1738 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1739 64-bit ${eval} (JH/03).
1741 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1742 GNU libc to support some of the 64-bit stuff, should not lead to
1743 conflicts. Defined before os.h is pulled in, so if a given platform
1744 needs to override this, it can.
1746 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1747 protection layer was required, which is not implemented.
1748 Bugzilla 1254, patch from Wolfgang Breyha.
1750 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1751 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1752 tls_dhparam take prime identifiers. Also unbreak combination of
1753 OpenSSL+DH_params+TLSSNI.
1755 PP/39 Disable SSLv2 by default in OpenSSL support.
1761 PP/01 Solaris build fix for Oracle's LDAP libraries.
1762 Bugzilla 1109, patch from Stephen Usher.
1764 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1766 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1769 TF/02 Fix a couple more cases where we did not log the error message
1770 when unlink() failed. See also change 4.74-TF/03.
1772 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1773 lock up or crash if it happened to be inside a call to libc when it
1774 got a SIGUSR1 from exiwhat.
1776 The SIGUSR1 handler appends the current process status to the process
1777 log which is later printed by exiwhat. It used to use the general
1778 purpose logging code to do this, but several functions it calls are
1779 not safe for signals.
1781 The new output code in the SIGUSR1 handler is specific to the process
1782 log, and simple enough that it's easy to inspect for signal safety.
1783 Removing some special cases also simplifies the general logging code.
1784 Removing the spurious timestamps from the process log simplifies
1787 TF/04 Improved ratelimit ACL condition.
1789 The /noupdate option has been deprecated in favour of /readonly which
1790 has clearer semantics. The /leaky, /strict, and /readonly update modes
1791 are mutually exclusive. The update mode is no longer included in the
1792 database key; it just determines when the database is updated. (This
1793 means that when you upgrade Exim will forget old rate measurements.)
1795 Exim now checks that the per_* options are used with an update mode that
1796 makes sense for the current ACL. For example, when Exim is processing a
1797 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1798 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1799 must specify per_mail/readonly. If you omit the update mode it defaults to
1800 /leaky where that makes sense (as before) or /readonly where required.
1802 The /noupdate option is now undocumented but still supported for
1803 backwards compatibility. It is equivalent to /readonly except that in
1804 ACLs where /readonly is required you may specify /leaky/noupdate or
1805 /strict/noupdate which are treated the same as /readonly.
1807 A useful new feature is the /count= option. This is a generalization
1808 of the per_byte option, so that you can measure the throughput of other
1809 aggregate values. For example, the per_byte option is now equivalent
1810 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1812 The per_rcpt option has been generalized using the /count= mechanism
1813 (though it's more complicated than the per_byte equivalence). When it is
1814 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1815 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1816 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1817 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1818 Note that using per_rcpt with a non-readonly update mode in more than
1819 one ACL will cause the recipients to be double-counted. (The per_mail
1820 and per_byte options don't have this problem.)
1822 The handling of very low rates has changed slightly. If the computed rate
1823 is less than the event's count (usually one) then this event is the first
1824 after a long gap. In this case the rate is set to the same as this event's
1825 count, so that the first message of a spam run is counted properly.
1827 The major new feature is a mechanism for counting the rate of unique
1828 events. The new per_addr option counts the number of different
1829 recipients that someone has sent messages to in the last time period. It
1830 behaves like per_rcpt if all the recipient addresses are different, but
1831 duplicate recipient addresses do not increase the measured rate. Like
1832 the /count= option this is a general mechanism, so the per_addr option
1833 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1834 example, measure the rate that a client uses different sender addresses
1835 with the options per_mail/unique=$sender_address. There are further
1836 details in the main documentation.
1838 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1840 TF/06 Removed a few PCRE remnants.
1842 TF/07 Automatically extract Exim's version number from tags in the git
1843 repository when doing development or release builds.
1845 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1846 Bugzilla 879. Patch from Paul Fisher.
1848 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1849 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1852 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1854 PP/05 Variable $av_failed, true if the AV scanner deferred.
1855 Bugzilla 1078. Patch from John Horne.
1857 PP/06 Stop make process more reliably on build failure.
1858 Bugzilla 1087. Patch from Heiko Schlittermann.
1860 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1861 Bugzilla 1089. Patch from Heiko Schlittermann.
1863 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1864 Bugzilla 1131. Patch from Holger Weiß.
1866 PP/09 Handle IPv6 addresses with SPF.
1867 Bugzilla 860. Patch from Wolfgang Breyha.
1869 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1871 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1874 PP/11 match_* no longer expand right-hand-side by default.
1875 New compile-time build option, EXPAND_LISTMATCH_RHS.
1876 New expansion conditions, "inlist", "inlisti".
1878 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1880 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1882 PP/14 fix log_write() format string regression from TF/03.
1883 Bugzilla 1152. Patch from Dmitry Isaikin.
1889 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1891 PP/02 Harmonised TLS library version reporting; only show if debugging.
1892 Layout now matches that introduced for other libraries in 4.74 PP/03.
1894 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1896 PP/04 New "dns_use_edns0" global option.
1898 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1901 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1902 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1904 TK/01 Updated PolarSSL code to 0.14.2.
1905 Bugzilla 1097. Patch from Andreas Metzler.
1907 PP/07 Catch divide-by-zero in ${eval:...}.
1908 Fixes bugzilla 1102.
1910 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1913 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1914 format-string attack -- SECURITY: remote arbitrary code execution.
1916 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1917 time unintentionally subject to list matching rules, letting the header
1918 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1919 arbitrary string expansion). This allowed for information disclosure.
1921 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1922 INT_MIN/-1 -- value coerced to INT_MAX.
1928 NM/01 Workaround for PCRE version dependency in version reporting
1931 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1932 This fixes portability to compilers other than gcc, notably
1933 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1935 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1936 makefiles for portability to HP-UX and POSIX correctness.
1938 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1939 Also via indented variable definition in the Makefile.
1940 (Debugging by Oliver Heesakkers).
1942 PP/02 Restore caching of spamd results with expanded spamd_address.
1943 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1945 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1946 Improves build reliability. Fix from: Frank Elsner
1948 NM/02 Fix wide character breakage in the rfc2047 coding
1949 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1951 NM/03 Allow underscore in dnslist lookups
1952 Fixes bug 1026. Patch from Graeme Fowler
1954 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1955 Code patches from Adam Ciarcinski of NetBSD.
1957 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1960 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1961 is logged, to avoid truncation. Patch from John Horne.
1963 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1964 Patch from Jakob Hirsch.
1966 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1967 SQL string expansion failure details.
1968 Patch from Andrey Oktyabrski.
1970 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1971 Patch from Simon Arlott.
1973 PP/09 New lookups functionality failed to compile on old gcc which rejects
1974 extern declarations in function scope.
1975 Patch from Oliver Fleischmann
1977 PP/10 Use sig_atomic_t for flags set from signal handlers.
1978 Check getgroups() return and improve debugging.
1979 Fixed developed for diagnosis in bug 927 (which turned out to be
1982 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1983 Patch from Mark Zealey.
1985 PP/12 Bugzilla 1056: Improved spamd server selection.
1986 Patch from Mark Zealey.
1988 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1989 Based on patch from Heiko Schlittermann.
1991 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1992 Patch from Uwe Doering, sign-off by Michael Haardt.
1994 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1995 variable declaration deep within a block. Bug and patch from
1998 PP/15 lookups-Makefile IRIX compatibility coercion.
2000 PP/16 Make DISABLE_DKIM build knob functional.
2002 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2003 Patch by Simon Arlott
2005 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2006 variable argument macros. Our copy now differs from upstream.
2012 TF/01 Failure to get a lock on a hints database can have serious
2013 consequences so log it to the panic log.
2015 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2016 controlled using the smtp_confirmation log selector.
2018 TF/03 Include the error message when we fail to unlink a spool file.
2020 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2021 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2022 for maintaining out-of-tree patches for some time.
2024 PP/01 Bugzilla 139: Documentation and portability issues.
2025 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2026 Handle per-OS dynamic-module compilation flags.
2028 PP/02 Let /dev/null have normal permissions.
2029 The 4.73 fixes were a little too stringent and complained about the
2030 permissions on /dev/null. Exempt it from some checks.
2031 Reported by Andreas M. Kirchwitz.
2033 PP/03 Report version information for many libraries, including
2034 Exim version information for dynamically loaded libraries. Created
2035 version.h, now support a version extension string for distributors
2036 who patch heavily. Dynamic module ABI change.
2038 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2039 privilege escalation vulnerability whereby the Exim run-time user
2040 can cause root to append content of the attacker's choosing to
2043 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2046 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2047 If dropping privileges for untrusted macros, we disabled normal logging
2048 on the basis that it would fail; for the Exim run-time user, this is not
2049 the case, and it resulted in successful deliveries going unlogged.
2050 Fixed. Reported by Andreas Metzler.
2056 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2057 only prepend for the Resent-* case. Fixes regression introduced in
2058 Exim 4.70 by NM/22 for Bugzilla 607.
2060 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2061 increasing numbers of administrators be bitten by this.
2063 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2065 PP/03 Bugzilla 994: added openssl_options main configuration option.
2067 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2069 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2071 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2073 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2074 without a peer certificate, leading to a segfault because of an
2075 assumption that peers always have certificates. Be a little more
2076 paranoid. Problem reported by Martin Tscholak.
2078 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2079 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2080 NB: ClamAV planning to remove STREAM in "middle of 2010".
2081 CL also introduces -bmalware, various -d+acl logging additions and
2082 more caution in buffer sizes.
2084 PP/09 Implemented reverse_ip expansion operator.
2086 PP/10 Bugzilla 937: provide a "debug" ACL control.
2088 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2090 PP/12 Bugzilla 973: Implement --version.
2092 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2094 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2096 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2098 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2099 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2100 ignore trailing whitespace.
2102 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2104 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2107 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2108 Notification from Dr Andrew Aitchison.
2110 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2111 ExtendedDetectionInfo response format.
2112 Notification from John Horne.
2114 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2117 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2118 XSL and documented dependency on system catalogs, with examples of how
2121 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2124 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2125 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2126 configuration file which is writeable by the Exim user or group.
2128 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2129 of configuration files to cover files specified with the -C option if
2130 they are going to be used with root privileges, not just the default
2133 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2134 option (effectively making it always true).
2136 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2137 files to be used while preserving root privileges.
2139 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2140 that rogue child processes cannot use them.
2142 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2143 run-time user, instead of root.
2145 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2146 Exim run-time user without dropping privileges.
2148 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2149 result string, instead of calling string_vformat() twice with the same
2152 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2153 for other users. Others should always drop root privileges if they use
2154 -C on the command line, even for a whitelisted configure file.
2156 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2158 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2164 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2165 $data_path, and $header_path variables; fixed documentation bugs and
2168 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2169 exipick to access non-standard spools, including the "frozen" queue
2172 NM/01 Bugzilla 965: Support mysql stored procedures.
2173 Patch from Alain Williams
2175 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2177 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2178 Patch from Andreas Metzler
2180 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2181 Patch from Kirill Miazine
2183 NM/05 Bugzilla 671: Added umask to procmail example.
2185 JJ/03 installed exipick 20100323.0, fixing doc bug
2187 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2188 directory. Notification and patch from Dan Rosenberg.
2190 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2192 TK/02 Improve log output when DKIM signing operation fails.
2194 MH/01 Treat the transport option dkim_domain as a colon separated
2195 list, not as a single string, and sign the message with each element,
2196 omitting multiple occurences of the same signer.
2198 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2199 Bugzilla 985, 986. Patch by Simon Arlott
2201 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2202 Patch by Simon Arlott
2204 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2205 MBX locking. Notification from Dan Rosenberg.
2211 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2213 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2215 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2217 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2219 NM/04 Bugzilla 915: Flag broken perl installation during build.
2225 TK/01 Added patch by Johannes Berg that expands the main option
2226 "spamd_address" if it starts with a dollar sign.
2228 TK/02 Write list of recipients to X-Envelope-Sender header when building
2229 the mbox-format spool file for content scanning (suggested by Jakob
2232 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2233 (http://www.dcc-servers.net/) support via dccifd. Activated by
2234 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2236 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2237 by Mark Daniel Reidel <mr@df.eu>.
2239 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2240 When building exim an external PCRE library is now needed -
2241 PCRE is a system library on the majority of modern systems.
2242 See entry on PCRE_LIBS in EDITME file.
2244 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2245 conversation. Added nologin parameter to request.
2246 Patch contributed by Kirill Miazine.
2248 TF/01 Do not log submission mode rewrites if they do not change the address.
2250 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2252 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2253 log files in place. Contributed by Roberto Lima.
2255 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2257 TF/03 Bugzilla 615: When checking the local_parts router precondition
2258 after a local_part_suffix or local_part_prefix option, Exim now
2259 does not use the address's named list lookup cache, since this
2260 contains cached lookups for the whole local part.
2262 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2263 Robert Millan. Documentation is in experimental-spec.txt.
2265 TF/04 Bugzilla 668: Fix parallel build (make -j).
2267 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2269 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2270 Patch provided by Jan Srzednicki.
2272 TF/05 Leading white space used to be stripped from $spam_report which
2273 wrecked the formatting. Now it is preserved.
2275 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2276 that they are available at delivery time.
2278 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2280 TF/08 TLS error reporting now respects the incoming_interface and
2281 incoming_port log selectors.
2283 TF/09 Produce a more useful error message if an SMTP transport's hosts
2284 setting expands to an empty string.
2286 NM/06 Bugzilla 744: EXPN did not work under TLS.
2287 Patch provided by Phil Pennock.
2289 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2290 Patch provided by Richard Godbee.
2292 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2293 acl_smtp_notquit, added index entry.
2295 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2296 Patch provided by Eugene Bujak.
2298 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2299 accept(). Patch provided by Maxim Dounin.
2301 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2302 Patch provided by Phil Pennock.
2304 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2306 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2307 Patch provided by Brad "anomie" Jorsch.
2309 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2310 Patch provided by Dean Brooks.
2312 TK/05 Add native DKIM support (does not depend on external libraries).
2314 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2315 Patch provided by Graeme Fowler.
2317 NM/16 Bugzilla 851: Documentation example syntax fix.
2319 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2321 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2324 NM/19 Bugzilla 745: TLS version reporting.
2325 Patch provided by Phil Pennock.
2327 NM/20 Bugzilla 167: bool: condition support.
2328 Patch provided by Phil Pennock.
2330 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2331 clients. Patch provided by Phil Pennock.
2333 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2334 Patch provided by Brad "anomie" Jorsch.
2336 NM/23 Bugzilla 687: Fix misparses in eximstats.
2337 Patch provided by Heiko Schlittermann.
2339 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2340 Patch provided by Heiko Schlittermann.
2342 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2343 plus update to original patch.
2345 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2347 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2348 Patch provided by David Brownlee.
2350 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2352 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2354 NM/30 Bugzilla 888: TLS documentation bugfixes.
2356 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2358 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2359 Unlike the original bugzilla I have changed all shell scripts in src tree.
2361 NM/33 Bugzilla 898: Transport filter timeout fix.
2362 Patch by Todd Rinaldo.
2364 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2365 Patch by Serge Demonchaux.
2367 NM/35 Bugzilla 39: Base64 decode bug fixes.
2368 Patch by Jakob Hirsch.
2370 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2372 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2374 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2376 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2382 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2383 ALT-N's libdkim that I have put here:
2384 http://duncanthrax.net/exim-experimental/
2386 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2387 were called 'true' and it seems that C99 defines that as a reserved
2388 keyword to be used with 'bool' variable types. That means you could
2389 not include C99-style headers which use bools without triggering
2390 build errors in sieve.c.
2392 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2393 as mailq or other aliases. Changed the --help handling significantly
2394 to do whats expected. exim_usage() emits usage/help information.
2396 SC/01 Added the -bylocaldomain option to eximstats.
2398 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2400 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2402 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2408 PH/01 Another patch from the Sieve maintainer.
2410 PH/02 When an IPv6 address is converted to a string for single-key lookup
2411 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2412 dots are used instead of colons so that keys in lsearch files need not
2413 contain colons. This was done some time before quoting was made available
2414 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2415 (notated using the quote facility) so as to distinguish them from IPv4
2416 keys. This meant that lookups for IP addresses in host lists did not work
2417 for iplsearch lookups.
2419 This has been fixed by arranging for IPv6 addresses to be expressed with
2420 colons if the lookup type is iplsearch. This is not incompatible, because
2421 previously such lookups could never work.
2423 The situation is now rather anomalous, since one *can* have colons in
2424 ordinary lsearch keys. However, making the change in all cases is
2425 incompatible and would probably break a number of configurations.
2427 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2430 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2431 conversion specification without a maximum field width, thereby enabling
2432 a rogue spamd server to cause a buffer overflow. While nobody in their
2433 right mind would setup Exim to query an untrusted spamd server, an
2434 attacker that gains access to a server running spamd could potentially
2435 exploit this vulnerability to run arbitrary code as the Exim user.
2437 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2438 $primary_hostname instead of what libspf2 thinks the hosts name is.
2440 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2441 a directory entry by the name of the lookup key. Previously, if a
2442 symlink pointed to a non-existing file or a file in a directory that
2443 Exim lacked permissions to read, a lookup for a key matching that
2444 symlink would fail. Now it is enough that a matching directory entry
2445 exists, symlink or not. (Bugzilla 503.)
2447 PH/03 The body_linecount and body_zerocount variables are now exported in the
2450 PH/04 Added the $dnslist_matched variable.
2452 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2453 This means they are set thereafter only if the connection becomes
2456 PH/06 Added the client_condition to authenticators so that some can be skipped
2457 by clients under certain conditions.
2459 PH/07 The error message for a badly-placed control=no_multiline_responses left
2460 "_responses" off the end of the name.
2462 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2464 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2465 (without spaces) instead of just copying the configuration text.
2467 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2469 PH/11 Added $max_received_linelength.
2471 PH/12 Added +ignore_defer and +include_defer to host lists.
2473 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2474 way in which PCRE > 7.0 is built.
2476 PH/14 Implemented queue_only_load_latch.
2478 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2479 MAIL command. The effect was to mangle the value on 64-bit systems.
2481 PH/16 Another patch from the Sieve maintainer.
2483 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2485 PH/18 If a system quota error occurred while trying to create the file for
2486 a maildir delivery, the message "Mailbox is full" was not appended to the
2487 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2488 only to a quota excession during the actual writing of the file.
2490 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2491 characters?) which causes problems in log lines. The DN values are now
2492 passed through string_printing() before being added to log lines.
2494 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2495 and InterBase are left for another time.)
2497 PH/21 Added message_body_newlines option.
2499 PH/22 Guard against possible overflow in moan_check_errorcopy().
2501 PH/23 POSIX allows open() to be a macro; guard against that.
2503 PH/24 If the recipient of an error message contained an @ in the local part
2504 (suitably quoted, of course), incorrect values were put in $domain and
2505 $local_part during the evaluation of errors_copy.
2511 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2512 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2515 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2516 issue a MAIL command.
2518 PH/02 In an ACL statement such as
2520 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2522 if a client was not listed at all, or was listed with a value other than
2523 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2524 the condition was not true (as it should be), so access was not denied.
2525 The bug was that the ! inversion was incorrectly passed on to the second
2526 item. This has been fixed.
2528 PH/03 Added additional dnslists conditions == and =& which are different from
2529 = and & when the dns lookup returns more than one IP address.
2531 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2532 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2534 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2535 FSYNC, which compiles an option called disable_fsync that allows for
2536 bypassing fsync(). The documentation is heavily laced with warnings.
2538 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2540 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2541 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2542 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2543 including adding "make clean"; (3) Added -fPIC when compiling the test
2544 dynamically loaded module, to get rid of a warning.
2546 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2547 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2548 = 0s. The bug is otherwise harmless.
2550 PH/07 There was a bug in the dovecot authenticator such that the value of
2551 $auth1 could be overwritten, and so not correctly preserved, after a
2552 successful authentication. This usually meant that the value preserved by
2553 the server_setid option was incorrect.
2555 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2557 PH/09 Installed PCRE release 7.0.
2559 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2560 run for batched SMTP input. It is now run at the start of every message
2561 in the batch. While fixing this I discovered that the process information
2562 (output by running exiwhat) was not always getting set for -bs and -bS
2563 input. This is fixed, and it now also says "batched" for BSMTP.
2565 PH/11 Added control=no_pipelining.
2567 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2568 patch, slightly modified), and move the expansion of helo_data till after
2569 the connection is made in the smtp transport (so it can use these
2572 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2574 PH/14 Added log_selector = +pid.
2576 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2578 PH/16 Add ${if forany and ${if forall.
2580 PH/17 Added dsn_from option to vary the From: line in DSNs.
2582 PH/18 Flush SMTP output before performing a callout, unless control =
2583 no_callout_flush is set.
2585 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2586 was true (the default) a successful delivery failed to delete the retry
2587 item, thus causing premature timeout of the address. The bug is now
2590 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2592 PH/21 Long custom messages for fakedefer and fakereject are now split up
2593 into multiline responses in the same way that messages for "deny" and
2594 other ACL rejections are.
2596 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2597 with slight modification.
2599 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2600 draft, changing the syntax and factoring some duplicate code".
2602 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2603 for deliveries of the second and subsequent messages over the same SMTP
2606 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2607 ${reduce, with only minor "tidies".
2609 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2611 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2612 expansion side effects.
2614 PH/27 When a message times out after an over-quota error from an Exim-imposed
2615 quota, the bounce message says "mailbox is full". This message was not
2616 being given when it was a system quota that was exceeded. It now should
2619 MH/03 Made $recipients available in local_scan(). local_scan() already has
2620 better access to the recipient list through recipients_list[], but
2621 $recipients can be useful in postmaster-provided expansion strings.
2623 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2624 in the case of a MAIL command with additional options following the
2625 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2626 were accidentally chopped off.
2628 PH/29 SMTP synchronization checks are implemented when a command is read -
2629 there is a check that no more input is waiting when there shouldn't be
2630 any. However, for some commands, a delay in an ACL can mean that it is
2631 some time before the response is written. In this time, more input might
2632 arrive, invalidly. So now there are extra checks after an ACL has run for
2633 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2634 pipelining has not been advertised.
2636 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2638 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2639 returned in the SMTP response when smtp_return_error_details was false.
2640 This has been fixed.
2642 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2643 instead of the C I/O that was originally supplied, because problems were
2644 reported on Solaris.
2646 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2647 Exim which did not show up earlier: it was assuming that a call to
2648 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2649 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2650 was a macro that became an assignment, so it seemed to work. This has
2651 changed to a proper function call with a void return, hence the compile
2652 error. Exim's code has been fixed.
2654 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2657 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2659 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2661 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2662 because it turns out to be too big or there is a timeout) there is no
2663 "Completed" line in the log. When some messages of this type were
2664 selected by exigrep, they were listed as "not completed". Others were
2665 picked up by some special patterns. I have improved the selection
2666 criteria to be more general.
2668 PH/38 The host_find_failed option in the manualroute router can now be set
2669 to "ignore", to completely ignore a host whose IP address cannot be
2670 found. If all hosts are ignored, the behaviour is controlled by the new
2671 host_all_ignored option.
2673 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2674 homing or because of multiple MX records with /mx) generated more than
2675 one IP address, and the following item turned out to be the local host,
2676 all the secondary addresses of the first item were incorrectly removed
2677 from the list, along with the local host and any following hosts (which
2678 is what is supposed to happen).
2680 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2681 whoever called Exim into the -H file. In the case of the daemon it was
2682 behaving confusingly. When first started, it used values for whoever
2683 started the daemon, but after a SIGHUP it used the Exim user (because it
2684 calls itself on a restart). I have changed the code so that it now always
2687 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2688 message are rejected with the same error (e.g. no authentication or bad
2689 sender address), and a DATA command is nevertheless sent (as can happen
2690 with PIPELINING or a stupid MUA), the error message that was given to the
2691 RCPT commands is included in the rejection of the DATA command. This is
2692 intended to be helpful for MUAs that show only the final error to their
2695 PH/42 Another patch from the Sieve maintainer.
2697 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2698 Eximstats - Fixed some broken HTML links and added missing column headers
2700 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2701 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2703 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2705 PH/43 Yet another patch from the Sieve maintainer.
2707 PH/44 I found a way to check for a TCP/IP connection going away before sending
2708 the response to the final '.' that terminates a message, but only in the
2709 case where the client has not sent further data following the '.'
2710 (unfortunately, this is allowed). However, in many cases there won't be
2711 any further data because there won't be any more messages to send. A call
2712 to select() can be used: if it shows that the input is "ready", there is
2713 either input waiting, or the socket has been closed. An attempt to read
2714 the next input character can distinguish the two cases. Previously, Exim
2715 would have sent an OK response which the client would never have see.
2716 This could lead to message repetition. This fix should cure that, at
2717 least in a lot of common cases.
2719 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2720 advertised in response to EHLO.
2726 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2727 fixed by 4.65/MH/01 (is this a record?) are fixed:
2729 (i) An empty string was always treated as zero by the numeric comparison
2730 operators. This behaviour has been restored.
2732 (ii) It is documented that the numeric comparison operators always treat
2733 their arguments as decimal numbers. This was broken in that numbers
2734 starting with 0 were being interpreted as octal.
2736 While fixing these problems I realized that there was another issue that
2737 hadn't been noticed. Values of message_size_limit (both the global option
2738 and the transport option) were treated as octal if they started with 0.
2739 The documentation was vague. These values are now always treated as
2740 decimal, and I will make that clear in the documentation.
2746 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2747 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2750 MH/01 Don't check that the operands of numeric comparison operators are
2751 integers when their expansion is in "skipping" mode (fixes bug
2752 introduced by 4.64-PH/07).
2754 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2755 child addresses, Exim now panics and dies. Previously, because the count
2756 is held in a short int, deliveries were likely to be lost. As such a
2757 large number of recipients for a single message is ridiculous
2758 (performance will be very, very poor), I have chosen to impose a limit
2759 rather than extend the field.
2765 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2766 leftover -K file (the existence of which was triggered by #402).
2767 While we were at it, introduced process PID as part of the -K
2768 filename. This should rule out race conditions when creating
2771 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2772 processing considerably. Previous code took too long for large mails,
2773 triggering a timeout which in turn triggers #401.
2775 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2776 in the DK code in transports.c. sendfile() is not really portable,
2777 hence the _LINUX specificness.
2779 TF/01 In the add_headers option to the mail command in an Exim filter,
2780 there was a bug that Exim would claim a syntax error in any
2781 header after the first one which had an odd number of characters
2784 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2785 callout verification, Exim cached a "reject" for the entire domain. This
2786 is correct for most verifications, but it is not correct for a recipient
2787 verification with use_sender or use_postmaster set, because in that case
2788 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2789 case of MAIL FROM:<> rejection from other early rejections (e.g.
2790 rejection of HELO). When verifying a recipient using a non-null MAIL
2791 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2792 Whatever the result of the callout, the value of the domain cache is
2793 left unchanged (for any other kind of callout, getting as far as trying
2794 RCPT means that the domain itself is ok).
2796 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2799 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2800 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2801 session, the daemon ignores ECONNECT errors and logs others; it now
2802 ignores EPIPE as well.
2804 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2805 (quoted-printable decoding).
2807 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2808 later the small subsequent patch to fix an introduced bug.
2810 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2812 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2814 PH/08 An error is now given if message_size_limit is specified negative.
2816 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2817 to be given (somewhat) arbitrary names.
2819 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2822 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2823 miscellaneous code fixes
2825 PH/10 Added the log_reject_target ACL modifier to specify where to log
2828 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2829 hostname. This is wrong, because it relates to the incoming message (and
2830 probably the interface on which it is arriving) and not to the outgoing
2831 callout (which could be using a different interface). This has been
2832 changed to use the value of the helo_data option from the smtp transport
2833 instead - this is what is used when a message is actually being sent. If
2834 there is no remote transport (possible with a router that sets up host
2835 addresses), $smtp_active_hostname is used.
2837 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2838 tweaks were necessary in order to get it to work (see also 21 below):
2839 (a) The code assumed that strncpy() returns a negative number on buffer
2840 overflow, which isn't the case. Replaced with Exim's string_format()
2842 (b) There were several signed/unsigned issues. I just did the minimum
2843 hacking in of casts. There is scope for a larger refactoring.
2844 (c) The code used strcasecmp() which is not a standard C function.
2845 Replaced with Exim's strcmpic() function.
2846 (d) The code set only $1; it now sets $auth1 as well.
2847 (e) A simple test gave the error "authentication client didn't specify
2848 service in request". It would seem that Dovecot has changed its
2849 interface. Fortunately there's a specification; I followed it and
2850 changed what the client sends and it appears to be working now.
2852 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2855 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2856 address A is aliased to B and C, where B exists and C does not. Without
2857 -v the output is "A verified" because verification stops after a
2858 successful redirection if more than one address is generated. However,
2859 with -v the child addresses are also verified. Exim was outputting "A
2860 failed to verify" and then showing the successful verification for C,
2861 with its parentage. It now outputs "B failed to verify", showing B's
2862 parentage before showing the successful verification of C.
2864 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2865 look up a TXT record in a specific list after matching in a combined
2868 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2869 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2870 they consult the DNS. I had assumed they would set it the way they
2871 wanted; and indeed my experiments on Linux seem to show that in some
2872 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2873 To be on the safe side, however, I have now made the interface to
2874 host_find_byname() similar to host_find_bydns(), with an argument
2875 containing the DNS resolver options. The host_find_byname() function now
2876 sets these options at its start, just as host_find_bydns() does. The smtp
2877 transport options dns_qualify_single and dns_search_parents are passed to
2878 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2879 of host_find_byname() use the default settings of RES_DEFNAMES
2880 (qualify_single) but not RES_DNSRCH (search_parents).
2882 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2883 spool_read_header() do less string testing, by means of a preliminary
2884 switch on the second character of optional "-foo" lines. (This is
2885 overdue, caused by the large number of possibilities that now exist.
2886 Originally there were few.) While I was there, I also converted the
2887 str(n)cmp tests so they don't re-test the leading "-" and the first
2888 character, in the hope this might squeeze out yet more improvement.
2890 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2891 flag allowing group syntax was set by the header_syntax check but not
2892 turned off, possible causing trouble later; (2) The flag was not being
2893 set at all for the header_verify test, causing "group"-style headers to
2894 be rejected. I have now set it in this case, and also caused header_
2895 verify to ignore an empty address taken from a group. While doing this, I
2896 came across some other cases where the code for allowing group syntax
2897 while scanning a header line wasn't quite right (mostly, not resetting
2898 the flag correctly in the right place). These bugs could have caused
2899 trouble for malformed header lines. I hope it is now all correct.
2901 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2902 with the "reply" argument non-NULL. The code, however (which originally
2903 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2904 but it didn't always do it. This confused somebody who was copying the
2905 code for some other use. I have removed all the tests.
2907 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2908 feature that was used to support insecure browsers during the U.S. crypto
2909 embargo. It requires special client support, and Exim is probably the
2910 only MTA that supported it -- and would never use it because real RSA is
2911 always available. This code has been removed, because it had the bad
2912 effect of slowing Exim down by computing (never used) parameters for the
2913 RSA_EXPORT functionality.
2915 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2916 authenticator to fail if there's a tab character in the incoming data
2917 (there should never be unless someone is messing about, as it's supposed
2918 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2919 if the connection is using TLS or if the remote IP is the same as the
2920 local IP, and the "valid-client-cert option" if a client certificate has
2923 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2924 authenticators. This can be used for authorization after authentication
2925 succeeds. (In the case of plaintext, it servers for both authentication
2928 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2929 if any retry times were supplied.
2931 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2932 connection, where there is no client IP address to check. In this
2933 situation, the verify now always succeeds.
2935 PH/25 Applied John Jetmore's -Mset patch.
2937 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2939 PH/27 In a string expansion for a processed (not raw) header when multiple
2940 headers of the same name were present, leading whitespace was being
2941 removed from all of them, but trailing whitespace was being removed only
2942 from the last one. Now trailing whitespace is removed from each header
2943 before concatenation. Completely empty headers in a concatenation (as
2944 before) are ignored.
2946 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2947 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2949 PH/29 [Removed. This was a change that I later backed out, and forgot to
2950 correct the ChangeLog entry (that I had efficiently created) before
2951 committing the later change.]
2953 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2954 address errors (4xx response to RCPT) over the same connection as other
2955 messages routed to the same hosts. Such deliveries are always "forced",
2956 so retry times are not inspected. This resulted in far too many retries
2957 for the affected addresses. The effect occurred only when there were more
2958 hosts than the hosts_max_try setting in the smtp transport when it had
2959 the 4xx errors. Those hosts that it had tried were not added to the list
2960 of hosts for which the message was waiting, so if all were tried, there
2961 was no problem. Two fixes have been applied:
2963 (i) If there are any address or message errors in an SMTP delivery, none
2964 of the hosts (tried or untried) are now added to the list of hosts
2965 for which the message is waiting, so the message should not be a
2966 candidate for sending over the same connection that was used for a
2967 successful delivery of some other message. This seems entirely
2968 reasonable: after all the message is NOT "waiting for some host".
2969 This is so "obvious" that I'm not sure why it wasn't done
2970 previously. Hope I haven't missed anything, but it can't do any
2971 harm, as the worst effect is to miss an optimization.
2973 (ii) If, despite (i), such a delivery is accidentally attempted, the
2974 routing retry time is respected, so at least it doesn't keep
2975 hammering the server.
2977 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2978 in ${readsocket because some servers need this prod.
2980 PH/32 Added some extra debug output when updating a wait-xxx database.
2982 PH/33 The hint "could be header name not terminated by colon", which has been
2983 given for certain expansion errors for a long time, was not being given
2984 for the ${if def:h_colon_omitted{... case.
2986 PH/34 The spec says: "With one important exception, whenever a domain list is
2987 being scanned, $domain contains the subject domain." There was at least
2988 one case where this was not true.
2990 PH/35 The error "getsockname() failed: connection reset by peer" was being
2991 written to the panic log as well as the main log, but it isn't really
2992 panic-worthy as it just means the connection died rather early on. I have
2993 removed the panic log writing for the ECONNRESET error when getsockname()
2996 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2997 runs only) independently of the message's sender address. This meant
2998 that, if the 4xx error was in fact related to the sender, a different
2999 message to the same recipient with a different sender could confuse
3000 things. In particular, this can happen when sending to a greylisting
3001 server, but other circumstances could also provoke similar problems.
3002 I have changed the default so that the retry time for these errors is now
3003 based a combination of the sender and recipient addresses. This change
3004 can be overridden by setting address_retry_include_sender=false in the
3007 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3008 remote server are returned as part of bounce messages. This was not
3009 happening for LMTP over a pipe (the lmtp transport), but now it is the
3010 same for both kinds of LMTP.
3012 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3013 in header lines that were in fact CNAMEs. This is no longer the case.
3015 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3016 and queue runs started by the daemon processed all messages. This has
3017 been fixed so that -R and -S can now usefully be given with -q<time>.
3019 PH/40 Import PCRE release 6.7 (fixes some bugs).
3021 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3023 PH/42 Give an error if -q is specified more than once.
3025 PH/43 Renamed the variables $interface_address and $interface_port as
3026 $received_ip_address and $received_port, to make it clear that these
3027 values apply to message reception, and not to the outgoing interface when
3028 a message is delivered. (The old names remain recognized, of course.)
3030 PH/44 There was no timeout on the connect() call when using a Unix domain
3031 socket in the ${readsocket expansion. There now is.
3033 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3034 be meaningful with "accept".
3036 SC/01 Eximstats V1.43
3037 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3039 SC/02 Eximstats V1.44
3040 Use a glob alias rather than an array ref in the generated
3041 parser. This improves both readability and performance.
3043 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3044 Collect SpamAssassin and rejection statistics.
3045 Don't display local sender or destination tables unless
3046 there is data to show.
3047 Added average volumes into the top table text output.
3049 SC/04 Eximstats V1.46
3050 Collect data on the number of addresses (recipients)
3051 as well as the number of messages.
3053 SC/05 Eximstats V1.47
3054 Added 'Message too big' to the list of mail rejection
3055 reasons (thanks to Marco Gaiarin).
3057 SC/06 Eximstats V1.48
3058 Mainlog lines which have GMT offsets and are too short to
3059 have a flag are now skipped.
3061 SC/07 Eximstats V1.49 (Alain Williams)
3062 Added the -emptyok flag.
3064 SC/08 Eximstats V1.50
3065 Fixes for obtaining the IP address from reject messages.
3067 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3068 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3069 whitespace changes from 4.64-PH/27
3071 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3074 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3075 are found, allow negative numbers in numeric criteria)
3077 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3079 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3080 to match changes made in 4.64-PH/43
3082 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3084 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3085 "domain" is actually an IP address, and force a failure. This locks out
3086 those revolvers/nameservers that support "A-for-A" lookups, in
3087 contravention of the specifications.
3089 PH/48 When a host name was looked up from an IP address, and the subsequent
3090 forward lookup of the name timed out, the host name was left in
3091 $sender_host_name, contrary to the specification.
3093 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3094 restricted to single-key lookups, Exim was not diagnosing an error if
3095 * or *@ was used with a query-style lookup.
3097 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3099 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3100 long ago, but noone interested enough thought of it. Let's just say that
3101 the "1.1" means that there are some new functions that weren't there at
3102 some point in the past.
3104 PH/51 Error processing for expansion failure of helo_data from an smtp
3105 transport during callout processing was broken.
3107 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3108 tested/used via the -bh/-bhc/-bs options.
3110 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3111 bug, fixed in subsequent PCRE releases).
3113 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3114 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3116 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3122 SC/01 Use a glob alias rather than an array ref in eximstats generated
3123 parser. This improves both readability and performance.
3125 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3126 Don't display local sender or destination tables in eximstats unless
3127 there is data to show.
3128 Added average volumes into the eximstats top table text output.
3130 SC/03 Collect data on the number of addresses (recipients) as well
3131 as the number of messages in eximstats.
3133 TF/01 Correct an error in the documentation for the redirect router. Exim
3134 does (usually) call initgroups() when daemonizing.
3136 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3137 with consistent privilege compared to when running as a daemon.
3139 TF/03 Note in the spec that $authenticated_id is not set for local
3140 submissions from trusted users.
3142 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3143 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3145 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3146 by adding some example configuration directives to the default
3147 configuration file. A little bit of work is required to uncomment the
3148 directives and define how usernames and passwords are checked, but
3149 there is now a framework to start from.
3151 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3152 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3153 without this. I don't know how relevant this is to other LDAP libraries.
3155 PH/02 Add the verb name to the "unknown ACL verb" error.
3157 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3159 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3161 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3162 directory not expanded when it should be if an expanded home directory
3163 was set for the address (which is overridden by the transport).
3165 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3168 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3169 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3170 because it is too late at that time, and has no effect.
3172 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3173 security issue with \' (bugzilla #107). I could not use the
3174 PQescapeStringConn() function, because it needs a PGconn value as one of
3177 PH/08 When testing addresses using -bt, indicate those final addresses that
3178 are duplicates that would not cause an additional delivery. At least one
3179 person was confused, thinking that -bt output corresponded to deliveries.
3180 (Suppressing duplicates isn't a good idea as you lose the information
3181 about possibly different redirections that led to the duplicates.)
3183 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3184 systems where poll() doesn't work, in particular OS X.
3186 PH/10 Added more information to debugging output for retry time not reached.
3188 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3189 operations in malware.c.
3191 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3194 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3195 syslog_duplication set false, log lines that would normally be written
3196 both the the main log and to the reject log were not written to syslog at
3199 PH/14 In the default configuration, change the use of "message" in ACL warn
3200 statements to "add_header".
3202 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3203 not followed by a command (e.g. "seen endif").
3205 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3206 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3209 PH/17 Added extra conditions to the default value of delay_warning_condition
3213 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3214 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3215 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3218 The Auto-Submitted: and various List- headers are standardised, whereas I
3219 don't think Precedence: ever was.
3221 PH/18 Refactored debugging code in route_finduser() to show more information,
3222 in particular, the error code if getpwnam() issues one.
3224 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3225 This is apparently needed in addition to the PH/07 change above to avoid
3226 any possible encoding problems.
3228 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3229 but not after initializing Perl.
3231 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3232 output them only if debugging. By default they are written stderr,
3233 apparently, which is not desirable.
3235 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3238 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3241 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3243 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3244 authenticated or an ident call has been made. Suppress the default
3245 values for $authenticated_id and $authenticated_sender (but permit -oMai
3246 and -oMas) when testing with -bh.
3248 PH/24 Re-jigged the order of the tests in the default configuration so that the
3249 tests for valid domains and recipients precede the DNS black list and CSA
3250 tests, on the grounds that those ones are more expensive.
3252 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3253 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3254 This bug exists in every version of Exim that I still have, right back to
3257 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3258 However, an attempt to turn on case-sensitivity in a regex key by
3259 including (?-i) didn't work because the subject string was already
3260 lowercased, and the effects were non-intuitive. It turns out that a
3261 one-line patch can be used to allow (?-i) to work as expected.
3267 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3268 other effects) broke the use of negated acl sub-conditions.
3270 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3273 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3274 "Deny" causes Exim to reject the incoming connection with a 554 error.
3275 Unfortunately, if there is a major crisis, such as a disk failure,
3276 tcp-wrappers gives "deny", whereas what one would like would be some
3277 kind of temporary error. A kludge has been added to help with this.
3278 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3279 554 error is used if errno is still zero or contains ENOENT (which occurs
3280 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3283 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3285 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3286 errors. Otherwise a message that provokes a temporary error (when other
3287 messages do not) can cause a whole host to time out.
3289 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3290 addresses were routed directly to files or pipes from a redirect router.
3291 File deliveries just didn't batch; pipe deliveries might have suffered
3294 PH/06 A failure to get a lock for a hints database would erroneously always say
3295 "Failed to get write lock", even when it was really a read lock.
3297 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3298 of 0600. This has been changed to use the value of the lockfile_mode
3299 option (which defaults to 0600).
3301 PH/08 Applied small patch from the Sieve maintainer.
3303 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3304 folder from quota calculations, a direct delivery into this folder messed
3305 up the contents of the maildirsize file. This was because the regex was
3306 used only to exclude .Trash (or whatever) when the size of the mailbox
3307 was calculated. There was no check that a delivery was happening into an
3308 excluded directory. This bug has been fixed by ignoring all quota
3309 processing for deliveries into excluded directories.
3311 PH/10 Added the maildirfolder_create_regex option to appendfile.
3317 PH/01 The code for finding all the local interface addresses on a FreeBSD
3318 system running IPv6 was broken. This may well have applied to all BSD
3319 systems, as well as to others that have similar system calls. The broken
3320 code found IPv4 interfaces correctly, but gave incorrect values for the
3321 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3322 that it would not match correctly against @[] and not recognize the IPv6
3325 PH/02 The ipliteral router was not recognizing addresses of the form user@
3326 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3328 PH/03 Added disable_ipv6.
3330 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3331 decoded form, because it is most often used to construct To: headers
3332 lines in autoreplies, and the decoded form may well be syntactically
3333 invalid. However, $reply_address has leading white space removed, and all
3334 newlines turned into spaces so that the autoreply transport does not
3337 PH/05 If group was specified without a user on a router, and no group or user
3338 was specified on a transport, the group from the router was ignored.
3340 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3341 for visible compile-time settings that can be used to change these
3342 numbers, for those that want even more. Backwards compatibility with old
3343 spool files has been maintained. However, going back to a previous Exim
3344 release will lost any variables that are in spool files.
3346 PH/07 Two small changes when running in the test harness: increase delay when
3347 passing a TCP/IP connection to a new process, in case the original
3348 process has to generate a bounce, and remove special handling of
3349 127.0.0.2 (sic), which is no longer necessary.
3351 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3352 be the same on different OS.
3354 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3357 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3358 whether --show-vars was specified or not
3360 JJ/02 exipick: Added support for new ACL variable spool format introduced
3363 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3364 syntactically invalid From: or Reply-to: line, and a filter used this to
3365 generate an autoreply, and therefore failed to obtain an address for the
3366 autoreply, Exim could try to deliver to a non-existent relative file
3367 name, causing unrelated and misleading errors. What now happens is that
3368 it logs this as a hard delivery error, but does not attempt to create a
3371 PH/11 The exinext utility has a -C option for testing purposes, but although
3372 the given file was scanned by exinext itself; it wasn't being passed on
3373 when Exim was called.
3375 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3376 an end-of-file indication when reading a command response.
3378 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3379 compiled. In many other places in Exim, IPv6 addresses are always
3380 recognized, so I have changed this. It also means that IPv4 domain
3381 literals of the form [IPV4:n.n.n.n] are now always recognized.
3383 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3384 used if the router is not running as root, for example, when verifying at
3385 ACL time, or when using -bh. The debugging output from this situation was
3386 non-existent - all you got was a failure to exec. I have made two
3389 (a) Failures to set uid/gid, the current directory, or a process leader
3390 in a subprocess such as that created by queryprogram now generate
3391 suitable debugging output when -d is set.
3393 (b) The queryprogram router detects when it is not running as root,
3394 outputs suitable debugging information if -d is set, and then runs
3395 the subprocess without attempting to change uid/gid.
3397 PH/15 Minor change to Makefile for building test_host (undocumented testing
3400 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3401 additional section of a DNS packet that returns MX or SRV records.
3402 Instead, it always explicitly searches for A/AAAA records. This avoids
3403 major problems that occur when a DNS server includes only records of one
3404 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3405 fixed another bug: if SRV records were looked up and the corresponding
3406 address records were *not* found in the additional section, the port
3407 values from the SRV records were lost.
3409 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3410 using the correct key (the original address) when searching the retry
3411 rules in order to find which one to use for generating the retry hint.
3413 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3414 adding the default one. Similarly, if it contains a Reply-To: header, the
3415 errors_reply_to option, if set, is not used.
3417 PH/19 When calculating a retry time, Exim used to measure the "time since
3418 failure" by looking at the "first failed" field in the retry record. Now
3419 it does not use this if it is later than than the arrival time of the
3420 message. Instead it uses the arrival time. This makes for better
3421 behaviour in cases where some deliveries succeed, thus re-setting the
3422 "first failed" field. An example is a quota failure for a huge message
3423 when small messages continue to be delivered. Without this change, the
3424 "time since failure" will always be short, possible causing more frequent
3425 delivery attempts for the huge message than are intended.
3426 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3428 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3429 $1, $2, $3) because the numerical variables can be reset during some
3430 expansion items (e.g. "match"), thereby losing the authentication data.
3432 PH/21 Make -bV show the size of off_t variables so that the test suite can
3433 decide whether to run tests for quotas > 2G.
3435 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3436 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3437 filecount value is greater than 2G or if a quota value is greater than 2G
3438 on a system where the size of off_t is not greater than 4, a panic error
3441 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3442 never match. The debug and -bh output now contains an explicit error
3443 message indicating a malformed IPv4 address or mask.
3445 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3446 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3447 PH/23 above applies.
3449 PH/25 Do not write to syslog when running in the test harness. The only
3450 occasion when this arises is a failure to open the main or panic logs
3451 (for which there is an explicit test).
3453 PH/26 Added the /no_tell option to "control=freeze".
3455 PH/27 If a host name lookup failed very early in a connection, for example, if
3456 the IP address matched host_lookup and the reverse lookup yielded a name
3457 that did not have a forward lookup, an error message of the form "no IP
3458 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3459 could be logged. Now it outputs the IP address instead of "NULL".
3461 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3462 allows the sender and the authenticated sender to be set when
3463 submitting a message from within Exim. Since child_open_exim() is
3464 documented for local_scan(), the new function should be too.
3466 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3467 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3468 results in an empty string is now treated as unset.
3470 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3472 PH/31 Added sender_verify_fail logging option.
3474 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3475 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3476 tidied the source and removed it altogether.
3478 PH/33 When a queue run was abandoned because the load average was too high, a
3479 log line was always written; now it is written only if the queue_run log
3480 selector is set. In addition, the log line for abandonment now contains
3481 information about the queue run such as the pid. This is always present
3482 in "start" and "stop" lines but was omitted from the "abandon" line.
3484 PH/34 Omit spaces between a header name and the colon in the error message that
3485 is given when verify = headers_syntax fails (if there are lots of them,
3486 the message gets confusing).
3488 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3489 names, as there are now some PTR records that contain slashes. This check
3490 is only to protect against broken name servers that fall over on strange
3491 characters, so the fact that it applies to all lookups doesn't matter.
3493 PH/36 Now that the new test suite is complete, we can remove some of the
3494 special code in Exim that was needed for the old test suite. For example,
3495 sorting DNS records because real resolvers return them in an arbitrary
3496 order. The new test suite's fake resolver always returns records in the
3499 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3500 bounces) except when queue_only is set, to avoid logging races between
3501 the different processes.
3503 PH/38 Panic-die if .include specifies a non-absolute path.
3505 PH/39 A tweak to the "H" retry rule from its user.
3507 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3508 a label. They prevented compilation on older perls.
3510 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3511 a warning to be raised on newish perls.
3513 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3514 on queue. Changes to match documented behaviour of showing count of
3515 messages matching specified criteria.
3517 PH/40 Changed the default ident timeout from 30s to 5s.
3519 PH/41 Added support for the use of login_cap features, on those BSD systems
3520 that have them, for controlling the resources used by pipe deliveries.
3522 PH/42 The content-scanning code uses fopen() to create files in which to put
3523 message data. Previously it was not paying any attention to the mode of
3524 the files. Exim runs with umask(0) because the rest of the code creates
3525 files with open(), and sets the required mode explicitly. Thus, these
3526 files were ending up world-writeable. This was not a big issue, because,
3527 being within the spool directory, they were not world-accessible. I have
3528 created a function called modefopen, which takes an additional mode
3529 argument. It sets umask(777), creates the file, chmods it to the required
3530 mode, then resets the umask. All the relevant calls to fopen() in the
3531 content scanning code have been changed to use this function.
3533 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3534 to 24 hours. This avoids potential overflow problems when processing G
3535 and H retry rules. I suspect nobody ever tinkers with this value.
3537 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3539 PH/45 When the plaintext authenticator is running as a client, the server's
3540 challenges are checked to ensure they are valid base64 strings. By
3541 default, the authentication attempt is cancelled if an invalid string is
3542 received. Setting client_ignore_invalid_base64 true ignores these errors.
3543 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3544 they are received. Thus, the responses can be made to depend on the
3545 challenges. If an invalid string is ignored, an empty string is placed in
3548 PH/46 Messages that are created by the autoreply transport now contains a
3549 References: header, in accordance with RFCs 2822 and 3834.
3551 PH/47 Added authenticated_sender_force to the smtp transport.
3553 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3555 PH/49 Installed latest patch from the Sieve maintainer.
3557 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3558 was also set, the appendfile transport was unnecessarily scanning a
3559 directory of message files (e.g. for maildir delivery) to find the count
3560 of files (along with the size), even though it did not need this
3561 information. It now does the scan only if it needs to find either the
3562 size of the count of files.
3564 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3566 PH/52 Two bugs concerned with error handling when the smtp transport is
3569 (i) Exim was not creating retry information for temporary errors given
3570 for individual recipients after the DATA command when the smtp transport
3571 was used in LMTP mode. This meant that they could be retried too
3572 frequently, and not timed out correctly.
3574 (ii) Exim was setting the flag that allows error details to be returned
3575 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3576 recipients that were returned after the DATA command.
3578 PH/53 This is related to PH/52, but is more general: for any failing address,
3579 when detailed error information was permitted to be returned to the
3580 sender, but the error was temporary, then after the final timeout, only
3581 "retry timeout exceeded" was returned. Now it returns the full error as
3582 well as "retry timeout exceeded".
3584 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3585 do this, and (what is worse) MTAs that accept it.
3587 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3588 will now be deprecated.
3590 PH/56 New os.c-cygwin from the Cygwin maintainer.
3592 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3593 formats (previously only available in exim formats via -bpr, -bpru,
3594 and -bpra. Now also available in native and exiqgrep formats)
3596 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3597 with very large, slow to parse queues
3599 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3601 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3603 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3604 responses to authentication challenges, though it was showing the
3605 challenges; (ii) I've removed the CR characters from the debug output for
3608 PH/58 Allow for the insertion of a newline as well as a space when a string
3609 is turned into more than one encoded-word during RFC 2047 encoding. The
3610 Sieve code now uses this.
3612 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3613 data_4xx, lost_connection, tls_required.
3615 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3616 message was being sent as an SMTP response.
3618 PH/61 Add -l and -k options to exicyclog.
3620 PH/62 When verifying, if an address was redirected to one new address, so that
3621 verification continued, and the new address failed or deferred after
3622 having set something in $address_data, the value of $address_data was not
3623 passed back to the ACL. This was different to the case when no
3624 redirection occurred. The value is now passed back in both cases.
3626 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3627 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3628 use login_cap.h, so on its own it isn't the distinguishing feature. The
3629 new name refers directly to the setclassresources() function.
3631 PH/65 Added configuration files for NetBSD3.
3633 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3635 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3636 is preferred over IPv4.
3638 PH/68 The bounce_return_message and bounce_return_body options were not being
3639 honoured for bounces generated during the reception of non-SMTP messages.
3640 In particular, this applied to messages rejected by the ACL. This bug has
3641 been fixed. However, if bounce_return_message is true and bounce_return_
3642 body is false, the headers that are returned for a non-SMTP message
3643 include only those that have been read before the error was detected.
3644 (In the case of an ACL rejection, they have all been read.)
3646 PH/69 The HTML version of the specification is now built in a directory called
3647 spec_html instead of spec.html, because the latter looks like a path with
3648 a MIME-type, and this confuses some software.
3650 PH/70 Catch two compiler warnings in sieve.c.
3652 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3653 function verify_get_ident() calls ip_connect() to connect a socket, but
3654 if the "connect()" function timed out, ip_connect() used to close the
3655 socket. However, verify_get_ident() also closes the socket later, and in
3656 between Exim writes to the log, which may get opened at this point. When
3657 the socket was closed in ip_connect(), the log could get the same file
3658 descriptor number as the socket. This naturally causes chaos. The fix is
3659 not to close the socket in ip_connect(); the socket should be closed by
3660 the function that creates it. There was only one place in the code where
3661 this was missing, in the iplookup router, which I don't think anybody now
3662 uses, but I've fixed it anyway.
3664 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3665 well as to direct DNS lookups. Otherwise the handling of names in host
3666 lists is inconsistent and therefore confusing.
3672 PH/01 Two changes to the default runtime configuration:
3674 (1) Move the checks for relay_from_hosts and authenticated clients from
3675 after to before the (commented out) DNS black list checks.
3677 (2) Add control=submission to the relay_from_hosts and authenticated
3678 clients checks, on the grounds that messages accepted by these
3679 statements are most likely to be submissions.
3681 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3683 (1) Generate an error if the third argument for the ${prvs expansion is
3686 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3689 (3) Reset the variables that are obtained from the first argument of
3690 ${prvscheck and used in the second argument before leaving the code,
3691 because their memory is reclaimed, so using them afterwards may do
3694 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3695 one (it's much easier than Tom thought :-).
3697 (5) Because of (4), we can now allow for the use of $prvscheck_result
3698 inside the third argument.
3700 PH/03 For some reason, the default setting of PATH when running a command from
3701 a pipe transport was just "/usr/bin". I have changed it to
3704 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3705 anything to be listed in the output from -bV.
3707 PH/05 When a filter generated an autoreply, the entire To: header line was
3708 quoted in the delivery log line, like this:
3710 => >A.N.Other <ano@some.domain> <original@ddress> ...
3712 This has been changed so that it extracts the operative address. There
3713 may be more than one such address. If so, they are comma-separated, like
3716 => >ano@some.domain,ona@other.domain <original@ddress> ...
3718 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3719 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3720 not being looked up in the rDNS to get a host name, Exim was showing the
3721 IP address twice in Received: lines, even though the IP addresses were
3722 identical. For example:
3724 Received: from [1.2.3.4] (helo=[1.2.3.4])
3726 However, if the real host name was known, it was omitting the HELO data
3727 if it matched the actual IP address. This has been tidied up so that it
3728 doesn't show the same IP address twice.
3730 PH/07 When both +timestamp and +memory debugging was on, the value given by
3731 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3732 called by the debug printing, thereby overwriting the timestamp buffer.
3733 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3735 PH/08 When the original message was included in an autoreply transport, it
3736 always said "this is a copy of the message, including all the headers",
3737 even if body_only or headers_only was set. It now gives an appropriate
3740 PH/09 Applied a patch from the Sieve maintainer which:
3742 o fixes some comments
3743 o adds the (disabled) notify extension core
3744 o adds some debug output for the result of if/elsif tests
3745 o points to the current vacation draft in the documentation
3746 and documents the missing references header update
3750 o fixes a bug in processing the envelope test (when testing
3751 multiple envelope elements, the last element determined the
3754 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3755 Electronic Mail") by including:
3757 Auto-submitted: auto-generated
3759 in the messages that it generates (bounce messages and others, such as
3760 warnings). In the case of bounce messages for non-SMTP messages, there was
3761 also a typo: it was using "Auto_submitted" (underscore instead of
3762 hyphen). Since every message generated by Exim is necessarily in response
3763 to another message, thes have all been changed to:
3765 Auto-Submitted: auto-replied
3767 in accordance with these statements in the RFC:
3769 The auto-replied keyword:
3771 - SHOULD be used on messages sent in direct response to another
3772 message by an automatic process,
3774 - MUST NOT be used on manually-generated messages,
3776 - MAY be used on Delivery Status Notifications (DSNs) and Message
3777 Disposition Notifications (MDNs),
3779 - MUST NOT be used on messages generated by automatic or periodic
3780 processes, except for messages which are automatic responses to
3783 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3784 to the default Received: header definition.
3786 PH/12 Added log selector acl_warn_skipped (default on).
3788 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3789 variables because (a) they are in the wrong storage pool and (b) even if
3790 they were copied, it wouldn't work properly because of the caching.
3792 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3793 checking when decoding. Apparently there are clients that generate
3794 overlong encoded strings. Why am I not surprised?
3796 PH/15 If the first argument of "${if match_address" was not empty, but did not
3797 contain an "@" character, Exim crashed. Now it writes a panic log message
3798 and treats the condition as false.
3800 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3802 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3803 extension "envelope-auth". The code is finished and in agreement with
3804 other implementations, but there is no documentation so far and in fact,
3805 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3806 not changing the active code.
3808 Print executed "if" and "elsif" statements when debugging is used. This
3809 helps a great deal to understand what a filter does.
3811 Document more things not specified clearly in RFC3028. I had all this
3812 sorted out, when out of a sudden new issues came to my mind. Oops."
3814 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3817 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3818 canonical form (as documented). However, after a host name lookup from
3819 the IP address, check_host() was doing a simple string comparison with
3820 addresses acquired from the DNS when checking that the found name did
3821 have the original IP as one of its addresses. Since any found IPv6
3822 addresses are likely to be in abbreviated form, the comparison could
3823 fail. Luckily, there already exists a function for doing the comparison
3824 by converting both addresses to binary, so now that is used instead of
3825 the text comparison.
3827 PH/20 There was another similar case to PH/19, when a complete host name was
3828 given in a host list; looking up its IP address could give an abbreviated
3829 form, whereas the current host's name might or might not be abbreviated.
3830 The same fix has been applied.
3836 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3837 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3840 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3841 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3843 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3845 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3846 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3847 Also, for "Auto-Submitted", treat anything other than "no" as
3848 non-personal, in accordance with RFC 3834. (Previously it treated
3849 anything starting "auto-" as non-personal.)
3851 TF/01 The control=submission/name=... option had a problem with syntax
3852 errors if the name included a slash character. The /name= option
3853 now slurps the rest of the string, so it can include any characters
3854 but it must come last in the list of options (after /sender_retain
3857 PH/05 Some modifications to the interface to the fake nameserver for the new
3865 TK/01 Added the "success_on_redirect" address verification option. See
3866 NewStuff for rationale and an example.
3868 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3870 PH/02 Patch to exigrep to allow it to work on syslog lines.
3872 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3873 fread() to skip over the body file's header line, because in Cygwin the
3874 header line is locked and is inaccessible.
3876 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3877 co-exist for some time) to make it clear that it is the Exim ID that is
3878 referenced, not the Message-ID: header line.
3880 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3881 string_format() function, because snprintf() does not exist on all
3884 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3885 ${stat: expansion item.
3887 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3888 protocol synchronization error", to keep the pedants happy.
3890 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3891 well as for IRIX systems, when gcc is being used. See the host.c source
3894 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3896 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3899 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3900 transport and to the smtp transport in LMTP mode.
3902 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3904 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3905 run a filter in a subprocess. This could lead to confusion in subsequent
3906 lookups in the parent process. There should also be a search_tidyup() at
3907 the end of the subprocess.
3909 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3910 only if the host matched helo_try_verify_hosts, which caused the
3911 verification to occur when the EHLO/HELO command was issued. The ACL just
3912 tested the remembered result. Now, if a previous verification attempt has
3913 not happened, "verify = helo" does it there and then.
3915 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3917 TK/03 Fix log output including CR from clamd.
3919 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3920 exist provoked a memory error which could cause a segfault.
3922 PH/15 Installed PCRE 6.2
3924 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3926 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3927 of the problem. Specifically, suggested +O2 rather than +O1 for the
3930 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3932 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3933 record, the port was not correctly logged when the outgoing_port log
3934 selector was set (it logged the transort's default port).
3936 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3937 fallback_hosts, and "hosts" in the smtp transport.
3939 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3940 host errors such as "Connection refused".
3942 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3943 authentication with radiusclient 0.4.9:
3945 - Error returned from rc_read_config was caught wrongly
3946 - Username/password not passed on to radius server due to wrong length.
3948 The presumption is that some radiusclient API changes for 4.51/PH/17
3949 were not taken care of correctly. The code is still untested by me (my
3950 Linux distribution still has 0.3.2 of radiusclient), but it was
3951 contributed by a Radius user.
3953 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3954 expanding the "port" option of the smtp transport.
3956 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3957 while reading a MIME header. Thanks to Tom Hughes for a patch.
3959 PH/24 Include config.h inside local_scan.h so that configuration settings are
3962 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3963 that in an ACL for RCPT (for example), you can examine exactly what was
3966 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3967 commands, but it was not correctly comparing the address with the actual
3968 client host address. Thus, it would show the EHLO address in Received:
3969 header lines when this was not necessary.
3971 PH/27 Added the % operator to ${eval:}.
3973 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3974 it should be ignoring failures (because with -C, for example, it has lost
3975 privilege). It wasn't ignoring creation failures other than "already
3978 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3981 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3982 because an input line was too long, either on its own, or by virtue of
3983 too many continuations, the temporary file was not being removed, and the
3984 return code was incorrect.
3986 PH/31 Missing "BOOL" in function definition in filtertest.c.
3988 PH/32 Applied Sieve patches from the maintainer.
3990 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3992 PH/33 Added "verify = not_blind".
3994 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3995 Local/Makefile (with some defaults set). These are used in built scripts
3996 such as exicyclog, but they have never been used in the exim_install
3997 script (though there are many overriding facilities there). I have
3998 arranged that the exim_install script now takes note of these two
4001 PH/35 Installed configuration files for Dragonfly.
4003 PH/36 When a locally submitted message by a trusted user did not contain a
4004 From: header, and the sender address was obtained from -f or from an SMTP
4005 MAIL command, and the trusted user did not use -F to supply a sender
4006 name, $originator_name was incorrectly used when constructing a From:
4007 header. Furthermore, $originator_name was used for submission mode
4008 messages from external hosts without From: headers in a similar way,
4009 which is clearly wrong.
4011 PH/37 Added control=suppress_local_fixups.
4013 PH/38 When log_selector = +received_sender was set, and the addition of the
4014 sender made the log line's construction buffer exactly full, or one byte
4015 less than full, an overflow happened when the terminating "\n" was
4018 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4019 when the result of a list match is failure because a DNS lookup failed.
4021 PH/40 RM_COMMAND is now used in the building process.
4023 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4024 the "build-* directories that it finds.
4026 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4027 address in a domain literal was a prefix of an interface address.
4029 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4030 when verifying a sender address, unless rewrite_headers is false.
4032 PH/44 Wrote a long comment about why errors_to addresses are verified as
4033 recipients, not senders.
4035 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4036 the ratelimit ACL was added.
4038 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4040 PH/46 Added extra information about PostgreSQL errors to the error string.
4042 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4043 avoiding the need to install special zones in a real server. This is
4044 backwards compatible; if it can't find the fake resolver, it drops back.
4045 Thus, both old and new test suites can be run.
4047 TF/02 Added util/ratelimit.pl
4049 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4050 clock is set back in time.
4052 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4053 Candler <B.Candler@pobox.com>.
4055 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4056 OK for addresses that are the result of redirections.
4058 PH/48 A number of further additions for the benefit of the new test suite,
4059 including a fake gethostbyname() that interfaces to the fake DNS resolver
4062 TF/06 The fix for widen_domains has also been applied to qualify_single and
4063 search_parents which are the other dnslookup options that can cause
4066 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4069 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4071 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4072 service" if it encountered an MX record with an empty target hostname.
4073 The message is now "an MX or SRV record indicated no SMTP service".
4075 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4076 if the DNS of the sending site is misconfigured. This is quite a
4077 common situation. This change restores the behaviour of treating a
4078 helo verification defer as a failure.
4080 PH/51 If self=fail was set on a router, the bounce message did not include the
4081 actual error message.
4087 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4089 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4090 command itself ended in error, the underlying message about the transport
4091 filter timeout was being overwritten with the pipe command error. Now the
4092 underlying error message should be appended to the second error message.
4094 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4096 PH/02 Reduce the amount of output that "make" produces by default. Full output
4097 can still be requested.
4099 PH/03 The warning log line about a condition test deferring for a "warn" verb
4100 was being output only once per connection, rather than after each
4101 occurrence (because it was using the same function as for successful
4102 "warn" verbs). This seems wrong, so I have changed it.
4104 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4105 it should not have, which might have caused a crash in the right
4106 circumstances, but probably never did.
4108 PH/04 Installed a modified version of Tony Finch's patch to make submission
4109 mode fix the return path as well as the Sender: header line, and to
4110 add a /name= option so that you can make the user's friendly name appear
4113 TF/03 Added the control = fakedefer ACL modifier.
4115 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4116 Mark Lowes for thorough testing.
4118 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4120 TK/03 Merged latest SRS patch from Miles Wilton.
4122 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4123 with the definition in sysexits.h (which is #included earlier).
4124 Fortunately, Exim does not actually use EX_OK. The code used to try to
4125 preserve the sysexits.h value, by assuming that macro definitions were
4126 scanned for macro replacements. I have been disabused of this notion,
4127 so now the code just undefines EX_OK before #including unistd.h.
4129 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4130 in the smtp transport. When a block could not be written in a single
4131 write() function, the timeout was being re-applied to each part-write.
4132 This seems wrong - if the receiver was accepting one byte at a time it
4133 would take for ever. The timeout is now adjusted when this happens. It
4134 doesn't have to be particularly precise.
4136 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4137 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4139 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4140 without a domain if the check to <postmaster@domain> fails.
4142 SC/01 Eximstats: added -xls and the ability to specify output files
4143 (patch written by Frank Heydlauf).
4145 SC/02 Eximstats: use FileHandles for outputting results.
4147 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4149 SC/04 Eximstats: fixed display of large numbers with -nvr option
4151 SC/05 Eximstats: fixed merging of reports with empty tables.
4153 SC/06 Eximstats: added the -include_original_destination flag
4155 SC/07 Eximstats: removed tabs and trailing whitespace.
4157 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4159 TK/06 MBOX spool code: Add real "From " MBOX separator line
4160 so the .eml file is really in mbox format (even though
4161 most programs do not really care). Patch from Alex Miller.
4163 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4164 The latter is generated from $received_to and is only set if the
4165 message has one envelope recipient. SA can use these headers,
4166 obviously out-of-the-box. Patch from Alex Miller.
4168 PH/08 The ${def test on a variable was returning false if the variable's
4169 value was "0", contrary to what the specification has always said!
4170 The result should be true unless the variable is empty.
4172 PH/09 The syntax error of a character other than { following "${if
4173 def:variable_name" (after optional whitespace) was not being diagnosed.
4174 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4175 accidental colon was present, for example, could give incorrect results.
4177 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4178 result is used (not including appendfile, where other changes are about
4181 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4182 This involved changing a lot of size variables from int to off_t. It
4183 should work with maildirs and everything.
4185 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4186 spamd dying while we are connected to it.
4188 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4191 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4192 function for BDB 4.3.
4194 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4196 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4197 the sources for PCRE have been re-arranged and more files are now
4200 PH/15 The code I had for printing potentially long long variables in PH/11
4201 above was not the best (it lost precision). The length of off_t variables
4202 is now inspected at build time, and an appropriate printing format (%ld
4203 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4204 to be "long long int" or "long int". This is needed for the internal
4205 formatting function string_vformat().
4207 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4208 the configuration file to be ":syslog", then the script "guesses" where
4209 the logs files are, rather than using the compiled in default. In our
4210 case the guess is not the same as the compiled default, so the script
4211 suddenly stopped working when I started to use syslog. The patch checks
4212 to see if log_file_path is "". If so, it attempts to read it from exim
4213 with no configuration file to get the compiled in version, before it
4214 falls back to the previous guessing code."
4216 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4217 implementing BATV in an Exim configuration. See NewStuff for the gory
4220 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4221 Makefile that are specific to HP-UX.
4223 PH/18 If the "use_postmaster" option was set for a recipient callout together
4224 with the "random" option, the postmaster address was used as the MAIL
4225 FROM address for the random test, but not for the subsequent recipient
4226 test. It is now used for both.
4228 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4229 patch removes a few documentation additions to RFC 3028, because the
4230 latest draft now contains them. It adds the new en;ascii-case comparator
4231 and a new error check for 8bit text in MIME parts. Comparator and
4232 require names are now matched exactly. I enabled the subaddress
4233 extension, but it is not well tested yet (read: it works for me)."
4235 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4236 rework some of the code of TK/09 above to avoid the hardwired use of
4237 "%lld" and "long long". Replaced the call to snprintf() with a call to
4240 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4241 records point to non-existent hosts", "retry timeout exceeded", and
4242 "retry time not reached for any host after a long failure period".
4244 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4245 experimental DomainKeys support:
4247 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4248 (2) On an error such as an illegally used "control", the wrong name for
4249 the control was given.
4251 These problems did NOT occur unless DomainKeys support was compiled.
4253 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4255 PH/24 Added ${if match_ip condition.
4257 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4258 databases so that it will be absolutely obvious if a crash occurs in the
4259 DB library. This is a regular occurrence (often caused by mis-matched
4262 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4263 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4264 picked up on a user's system that detects such things. There doesn't seem
4265 to be a gcc warning option for this - only an attribute that has to be
4266 put on the function's prototype. It seems that in Fedora Core 4 they have
4267 set this on a number of new functions. No doubt there will be more in due
4270 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4271 specify a transport. However, if an address that was verified by such a
4272 router was the subject of a callout, Exim crashed because it tried to
4273 read the rcpt_include_affixes from the non-existent transport. Now it
4274 just assumes that the setting of that option is false. This bug was
4275 introduced by 4.51/PH/31.
4277 PH/28 Changed -d+all to exclude +memory, because that information is very
4278 rarely of interest, but it makes the output a lot bigger. People tend to
4279 do -d+all out of habit.
4281 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4282 code in os-type was giving problems when libc.so lives in lib64, like on
4285 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4286 aren't the modern standard, and it seems that some systems' include files
4287 don't always have them. Exim was already checking for some of the newer
4288 ones like T_AAAA, and defining it itself. I've added checks for all the
4289 record types that Exim uses.
4291 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4292 not automatically generating a new one, as it is supposed to. This
4293 prevented TLS from working. If the file did exist, but contained invalid
4294 data, a new version was generated, as expected. It was only the case of a
4295 non-existent file that was broken.
4297 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4298 with a change in libdomainkeys > 0.64.
4300 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4301 from DNS. If the selector record carries the flag, it now has
4302 precedence over the domain-wide flag.
4304 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4306 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4307 the use of a port name that isn't defined in /etc/services) occurred, the
4308 message was deferred as in a normal delivery, and thus remained on the
4309 spool, instead of being failed because of the mua_wrapper setting. This
4310 is now fixed, and I tidied up some of the mua_wrapper messages at the
4313 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4314 the messages in a hash of arrays rather than using individual hashes.
4315 This is a bit cleaner and results in dramatic memory savings, albeit
4316 at a slight CPU cost.
4318 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4319 as requested by Marc Sherman.
4321 SC/10 Eximstats: added histograms for user specified patterns as requested
4324 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4326 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4327 fopen() in the content-scanning modules that did not already have it.
4333 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4334 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4336 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4338 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4340 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4341 to test Sieve filters that use "vacation".
4343 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4344 that changes the way the GnuTLS parameters are stored in the cache file.
4345 The new format can be generated externally. For backward compatibility,
4346 if the data in the cache doesn't make sense, Exim assumes it has read an
4347 old-format file, and it generates new data and writes a new file. This
4348 means that you can't go back to an older release without removing the
4351 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4352 work if there are any delivery delays because "one_time" forces the
4353 parent to be marked "delivered", so its unseen clone is never tried
4354 again. For this reason, Exim now forbids the simultaneous setting of
4357 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4358 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4359 entry if you want to know the details. The fix, however, neglected to
4360 consider the case when local delivery batching is involved. The test for
4361 "previously delivered" was not happening when checking to see if an
4362 address could be batched with a previous (undelivered) one; under
4363 certain circumstances this could lead to multiple deliveries to the same
4366 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4367 in its include files, and this causes problems building Exim.
4369 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4370 header_syntax) but Exim was just ignoring anything given after a slash.
4371 In particular, this caused confusion with an attempt to use "verify =
4372 reverse_host_lookup/defer_ok". An error is now given when options are
4373 supplied for verify items that do not have them. (Maybe reverse_host_
4374 lookup should have a defer_ok option, but that's a different point.)
4376 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4377 defined by RFC 821) to 2048, because there were problems with some AUTH
4378 commands, and RFC 1869 says the size should be increased for extended
4379 SMTP commands that take arguments.
4381 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4384 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4385 "unknown" error; now it says that the functionality isn't in the binary.
4387 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4388 an address' error message when a string expansion fails (syntax or
4389 whatever). Otherwise the password may appear in the log. Following change
4390 PH/42 below, there is no longer a chance of it appearing in a bounce
4393 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4395 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4396 of its addresses was ever tried. (Bugzilla bug #2.)
4398 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4399 the result incorrectly in the debug output. (It correctly added a newline
4400 to what was transported.)
4402 TF/01 Added $received_time.
4404 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4405 commented out examples of how to interface to a virus scanner and to
4406 SpamAssassin. Also added commented examples of av_scanner and
4407 spamd_address settings.
4409 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4410 and controls are allowed in which ACLs. There were a couple of minor
4411 errors. Some of the entries in the conditions table (which is a table of
4412 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4413 negation of where the condition IS allowed.
4415 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4417 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4418 header file does not have a version number, so I've had to invent a new
4419 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4420 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4421 radiusclient), but it was contributed by a Radius user.
4423 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4424 files or directories, for OpenSSL.
4426 PH/19 When an Exim process that is running as root has to create an Exim log
4427 file, it does so in a subprocess that runs as exim:exim so as to get the
4428 ownership right at creation (otherwise, other Exim processes might see
4429 the file with the wrong ownership). There was no test for failure of this
4430 fork() call, which would lead to the process getting stuck as it waited
4431 for a non-existent subprocess. Forks do occasionally fail when resources
4432 run out. I reviewed all the other calls to fork(); they all seem to check
4435 PH/20 When checking for unexpected SMTP input at connect time (before writing
4436 the banner), Exim was not dealing correctly with a non-positive return
4437 from the read() function. If the client had disconnected by this time,
4438 the result was a log entry for a synchronization error with an empty
4439 string after "input=" when read() returned zero. If read() returned -1
4440 (an event I could not check), uninitialized data bytes were printed.
4441 There were reports of junk text (parts of files, etc) appearing after
4444 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4446 PH/22 Added support for macro redefinition, and (re)definition in between
4447 driver and ACL definitions.
4449 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4450 forgetting to use the resulting value; it was using the unexpanded value.
4452 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4453 hadn't been configured. The fix is from Juergen Kreileder, who
4454 understands it better than I do:
4456 "Here's what I see happening with three configured cyrus_sasl
4457 authenticators configured (plain, login, cram-md5):
4459 On startup auth_cyrus_sasl_init() gets called for each of these.
4460 This means three calls to sasl_listmech() without a specified mech_list.
4461 => SASL tests which mechs of all available mechs actually work
4462 => three warnings about OTP not working
4463 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4465 With the patch, sasl_listmech() also gets called three times. But now
4466 SASL's mech_list option is set to the server_mech specified in the the
4467 authenticator. Or in other words, the answer from sasl_listmech()
4468 gets limited to just the mech you're testing for (which is different
4470 => the return list contains just 'plain' or 'login', 'cram-md5' or
4471 nothing depending on the value of ob->server_mech.
4473 I've just tested the patch: Authentication still works fine,
4474 unavailable mechs specified in the exim configuration are still
4475 caught, and the auth.log warnings about OTP are gone."
4477 PH/25 When debugging is enabled, the contents of the command line are added
4478 to the debugging output, even when log_selector=+arguments is not
4481 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4482 answer is "GNU", and only if the return is "GNU/something" is the answer
4485 PH/27 $acl_verify_message is now set immediately after the failure of a
4486 verification in an ACL, and so is available in subsequent modifiers. In
4487 particular, the message can be preserved by coding like this:
4489 warn !verify = sender
4490 set acl_m0 = $acl_verify_message
4492 Previously, $acl_verify_message was set only while expanding "message"
4493 and "log_message" when a very denied access.
4495 PH/28 Modified OS/os.c-Linux with
4497 -#ifndef OS_LOAD_AVERAGE
4498 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4500 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4501 nomenclature these days.)
4503 PH/29 Installed patch from the Sieve maintainer that adds the options
4504 sieve_useraddress and sieve_subaddress to the redirect router.
4506 PH/30 In these circumstances:
4507 . Two addresses routed to the same list of hosts;
4508 . First host does not offer TLS;
4509 . First host accepts first address;
4510 . First host gives temporary error to second address;
4511 . Second host offers TLS and a TLS session is established;
4512 . Second host accepts second address.
4513 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4514 and peerdn, if requested) that were in fact used only for the second
4517 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4518 attention to any local part prefix or suffix that was matched by the
4519 router that accepted the address. It now behaves in the same way as it
4520 does for delivery: the affixes are removed from the local part unless
4521 rcpt_include_affixes is set on the transport.
4523 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4524 timeout during the DATA phase of an incoming message.
4526 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4527 applied a patch sanctioned by the Sieve maintainer.
4529 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4530 the uid or gid is negative. A case of a negative gid caused this to be
4531 noticed. The fix allows for either to be negative.
4533 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4534 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4537 PH/36 The change PH/12 above was broken. Fixed it.
4539 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4540 the grounds that routing the same address twice would always produce the
4541 same answer. This might have been true once, but it is certainly no
4542 longer true now. Routing a child address may depend on the previous
4543 routing that produced that child. Some complicated redirection strategies
4544 went wrong when messages had multiple recipients, and made Exim's
4545 behaviour dependent on the order in which the addresses were given.
4547 I have moved the duplicate checking until after the routing is complete.
4548 Exim scans the addresses that are assigned to local and remote
4549 transports, and removes any duplicates. This means that more work will be
4550 done, as duplicates will always all be routed, but duplicates are
4551 presumably rare, so I don't expect this is of any significance.
4553 For deliveries to pipes, files, and autoreplies, the duplicate checking
4554 still happens during the routing process, since they are not going to be
4557 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4558 It corrects a timeout issue with spamd. This is Ian's comment: "The
4559 background is that sometimes spamd either never reads data from a
4560 connection it has accepted, or it never writes response data. The exiscan
4561 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4562 blindly assumes that writes won't block so it may never time out."
4564 PH/39 Allow G after quota size as well as K and M.
4566 PH/40 The value set for $authenticated_id in an authenticator may not contain
4567 binary zeroes or newlines because the value is written to log lines and
4568 to spool files. There was no check on this. Now the value is run through
4569 the string_printing() function so that such characters are converted to
4570 printable escape sequences.
4572 PH/41 $message_linecount is a new variable that contains the total number of
4573 lines in the message. Compare $body_linecount, which is the count for the
4576 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4577 bounce and delay warning messages, except in certain special cases, which
4580 (a) An SMTP error message from a remote host;
4581 (b) A message specified in a :fail: redirection;
4582 (c) A message specified in a "fail" command in a system filter;
4583 (d) A message specified in a FAIL return from the queryprogram router;
4584 (e) A message specified by the cannot_route_message router option.
4586 In these cases only, Exim does include the error details in bounce and
4587 warning messages. There are also a few cases where bland messages such
4588 as "unrouteable address" or "local delivery error" are given.
4590 PH/43 $value is now also set for the "else" part of a ${run expansion.
4592 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4593 being worked on, but at least Exim now implements the latest version to
4596 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4597 process to complete was treated as a delivery failure, a timeout while
4598 writing the message to the pipe was logged, but erroneously treated as a
4599 successful delivery. Such timeouts include transport filter timeouts. For
4600 consistency with the overall process timeout, these timeouts are now
4601 treated as errors, giving rise to delivery failures by default. However,
4602 there is now a new Boolean option for the pipe transport called
4603 timeout_defer, which, if set TRUE, converts the failures into defers for
4604 both kinds of timeout. A transport filter timeout is now identified in
4607 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4608 systems where "make" and "gmake" are different, calling "gmake" at top
4609 level broke things. I've arranged for the value of $(MAKE) to be passed
4610 from the Makefile to this script so that it can call the same version of
4614 A note about Exim versions 4.44 and 4.50
4615 ----------------------------------------
4617 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4618 changes of various kinds. As a consequence, a big documentation update was
4619 needed. This delayed the release for rather longer than seemed good, especially
4620 in the light of a couple of (minor) security issues. Therefore, the changes
4621 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4622 release. So 4.44 and 4.50 are in effect two different branches that both start
4625 I have left the 4.50 change log unchanged; it contains all the changes since
4626 4.43. The change log for 4.44 is below; many of its items are identical to
4627 those for 4.50. This seems to be the most sensible way to preserve the
4628 historical information.
4634 1. Minor wording change to the doc/README.SIEVE file.
4636 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4637 computation of the current number of files was incorrect.
4639 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4640 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4643 4. Give more explanation in the error message when the command for a transport
4644 filter fails to execute.
4646 5. There are several places where Exim runs a non-Exim command in a
4647 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4648 was being done only for the command run by the queryprogram router. It is
4649 now done for all such subprocesses. The other cases are: ${run, transport
4650 filters, and the commands run by the lmtp and pipe transports.
4652 6. Added CONFIGURE_GROUP build-time option.
4654 7. Some older OS have a limit of 256 on the maximum number of file
4655 descriptors. Exim was using setrlimit() to set 1000 as a large value
4656 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4657 systems. I've change it so that if it can't get 1000, it tries for 256.
4659 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4660 was an oversight, and furthermore, ever since the addition of extra
4661 controls (e.g. 4.43/32), the checks on when to allow different forms of
4662 "control" were broken. There should now be diagnostics for all cases when a
4663 control that does not make sense is encountered.
4665 9. Added the /retain_sender option to "control=submission".
4667 10. $recipients is now available in the predata ACL (oversight).
4669 11. Tidy the search cache before the fork to do a delivery from a message
4670 received from the command line. Otherwise the child will trigger a lookup
4671 failure and thereby defer the delivery if it tries to use (for example) a
4672 cached ldap connection that the parent has called unbind on.
4674 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4675 of $address_data from the recipient verification was clobbered by the
4676 sender verification.
4678 13. The value of address_data from a sender verification is now available in
4679 $sender_address_data in subsequent conditions in the ACL statement.
4681 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4683 15. Added a new option "connect=<time>" to callout options, to set a different
4686 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4687 was its contents. (It was OK if the option was not defined at all.)
4689 17. A "Completed" log line is now written for messages that are removed from
4690 the spool by the -Mrm option.
4692 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4693 information about exactly what failed.
4695 19. Added -dd to debug only the daemon process.
4697 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4698 handles timeouts, both on the server side and network timeouts. Renamed the
4699 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4701 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4702 It is now set to "smtps".
4704 22. $host_address is now set to the target address during the checking of
4705 ignore_target_hosts.
4707 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4708 being passed; this would have caused $sender_host_name to have been used if
4709 matching the list had actually called for a host name (not very likely,
4710 since this list is usually IP addresses). A host name is now passed as
4713 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4714 code that specifies a non-restarting handler (typically sigaction() in
4715 modern systems) in an attempt to fix a rare and obscure crash bug.
4717 25. Narrowed the window for a race in the daemon that could cause it to ignore
4718 SIGCHLD signals. This is not a major problem, because they are used only to
4719 wake it up if nothing else does.
4721 26. A malformed maildirsize file could cause Exim to calculate negative values
4722 for the mailbox size or file count. Odd effects could occur as a result.
4723 The maildirsize information is now recalculated if the size or filecount
4726 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4727 support for a long time. Removed HAVE_SYS_VFS_H.
4729 28. Installed the latest version of exipick from John Jetmore.
4731 29. In an address list, if the pattern was not a regular expression, an empty
4732 subject address (from a bounce message) matched only if the pattern was an
4733 empty string. Non-empty patterns were not even tested. This was the wrong
4734 because it is perfectly reasonable to use an empty address as part of a
4735 database query. An empty address is now tested by patterns that are
4736 lookups. However, all the other forms of pattern expect the subject to
4737 contain a local part and a domain, and therefore, for them, an empty
4738 address still always fails if the pattern is not itself empty.
4740 30. Exim went into a mad DNS loop when attempting to do a callout where the
4741 host was specified on an smtp transport, and looking it up yielded more
4742 than one IP address.
4744 31. Re-factored the code for checking spool and log partition space into a
4745 function that finds that data and another that does the check. The former
4746 is then used to implement four new variables: $spool_space, $log_space,
4747 $spool_inodes, and $log_inodes.
4749 32. The RFC2047 encoding function was originally intended for short strings
4750 such as real names; it was not keeping to the 75-character limit for
4751 encoded words that the RFC imposes. It now respects the limit, and
4752 generates multiple encoded words if necessary. To be on the safe side, I
4753 have increased the buffer size for the ${rfc2047: expansion operator from
4756 33. It is now permitted to omit both strings after an "if" condition; if the
4757 condition is true, the result is "true". As before, when the second string
4758 is omitted, a false condition yields an empty string. This makes it less
4759 cumbersome to write custom ACL and router conditions.
4761 34. Failure to deliver a bounce message always caused it to be frozen, even if
4762 there was an errors_to setting on the router. The errors_to setting is now
4765 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4766 canonical form (fully expanded) before being placed in
4767 $sender_host_address.
4769 36. The table in the code that translates DNS record types into text (T_A to
4770 "A" for instance) was missing entries for NS and CNAME. It is just possible
4771 that this could have caused confusion if both these types were looked up
4772 for the same domain, because the text type is used as part of Exim's
4773 per-process caching. But the chance of anyone hitting this buglet seems
4776 37. The dnsdb lookup has been extended in a number of ways.
4778 (1) There is a new type, "zns", which walks up the domain tree until it
4779 finds some nameserver records. It should be used with care.
4781 (2) There is a new type, "mxh", which is like "mx" except that it returns
4782 just the host names, not the priorities.
4784 (3) It is now possible to give a list of domains (or IP addresses) to be
4785 looked up. The behaviour when one of the lookups defers can be
4786 controlled by a keyword.
4788 (4) It is now possible to specify the separator character for use when
4789 multiple records are returned.
4791 38. The dnslists ACL condition has been extended: it is now possible to supply
4792 a list of IP addresses and/or domains to be looked up in a particular DNS
4795 39. Added log_selector=+queue_time_overall.
4797 40. When running the queue in the test harness, wait just a tad after forking a
4798 delivery process, to get repeatability of debugging output.
4800 41. Include certificate and key file names in error message when GnuTLS fails
4801 to set them up, because the GnuTLS error message doesn't include the name
4802 of the failing file when there is a problem reading it.
4804 42. Allow both -bf and -bF in the same test run.
4806 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4808 44. The "Exiscan patch" is now merged into the mainline Exim source.
4810 45. Sometimes the final signoff response after QUIT could fail to get
4811 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4812 < 0 before doing a fflush(). This bug looks as though it goes back to the
4813 introduction of TLS in release 3.20, but "sometimes" must have been rare
4814 because the tests only now provoked it.
4816 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4817 (this can affect the format of dates).
4819 47. exim_tidydb, when checking for the continued existence of a message for
4820 which it has found a message-specific retry record, was not finding
4821 messages that were in split spool directories. Consequently, it was
4822 deleting retry records that should have stayed in existence.
4824 48. Steve fixed some bugs in eximstats.
4826 49. The SPA authentication driver was not abandoning authentication and moving
4827 on to the next authenticator when an expansion was forced to fail,
4828 contradicting the general specification for all authenticators. Instead it
4829 was generating a temporary error. It now behaves as specified.
4831 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4832 (the order specifies the preference for clients). The order is now AES256,
4833 AES128, 3DES, ARCFOUR128.
4835 51. Small patch to Sieve code - explicitly set From: when generating an
4838 52. Exim crashed if a remote delivery caused a very long error message to be
4839 recorded - for instance if somebody sent an entire SpamAssassin report back
4840 as a large number of 550 error lines. This bug was coincidentally fixed by
4841 increasing the size of one of Exim's internal buffers (big_buffer) that
4842 happened as part of the Exiscan merge. However, to be on the safe side, I
4843 have made the code more robust (and fixed the comments that describe what
4846 53. Now that there can be additional text after "Completed" in log lines (if
4847 the queue_time_overall log selector is set), a one-byte patch to exigrep
4848 was needed to allow it to recognize "Completed" as not the last thing in
4851 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4852 patch that reportedly fixes this has been added. I am not expert enough to
4853 create a test for it. This is what the patch creator wrote:
4855 "I found a little strange behaviour of ldap code when working with
4856 Windows 2003 AD Domain, where users was placed in more than one
4857 Organization Units. When I tried to give exim partial DN, the exit code
4858 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4859 But simultaneously result of request was absolutely normal ldap result,
4860 so I produce this patch..."
4862 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4863 REFERENCE, so I have modified the code to exclude the patch when that macro
4866 55. Some experimental protocols are using DNS PTR records for new purposes. The
4867 keys for these records are domain names, not reversed IP addresses. The
4868 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4869 leaves it alone. Component reversal etc. now happens only for IP addresses.
4872 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4874 57. Double the size of the debug message buffer (to 2048) so that more of very
4875 long debug lines gets shown.
4877 58. The exicyclog utility now does better if the number of log files to keep
4878 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4880 59. Two changes related to the smtp_active_hostname option:
4882 (1) $smtp_active_hostname is now available as a variable.
4883 (2) The default for smtp_banner uses $smtp_active_hostname instead
4884 of $primary_hostname.
4886 60. The host_aton() function is supposed to be passed a string that is known
4887 to be a valid IP address. However, in the case of IPv6 addresses, it was
4888 not checking this. This is a hostage to fortune. Exim now panics and dies
4889 if the condition is not met. A case was found where this could be provoked
4890 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4891 components; fortuitously, this particular loophole had already been fixed
4892 by change 4.50/55 above.
4894 If there are any other similar loopholes, the new check in host_aton()
4895 itself should stop them being exploited. The report I received stated that
4896 data on the command line could provoke the exploit when Exim was running as
4897 exim, but did not say which command line option was involved. All I could
4898 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4899 running as the user.
4902 61. There was a buffer overflow vulnerability in the SPA authentication code
4903 (which came originally from the Samba project). I have added a test to the
4904 spa_base64_to_bits() function which I hope fixes it.
4907 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4908 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4910 63. The daemon start-up calls getloadavg() while still root for those OS that
4911 need the first call to be done as root, but it missed one case: when
4912 deliver_queue_load_max is set with deliver_drop_privilege. This is
4913 necessary for the benefit of the queue runner, because there is no re-exec
4914 when deliver_drop_privilege is set.
4916 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4917 This has been fixed.
4919 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4920 was in use, was not putting the data itself into the right store pool;
4921 consequently, it could be overwritten for a subsequent message in the same
4922 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4925 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4927 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4928 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4929 the function were treating the return as a boolean value, which happened to
4930 work because 0=false and not-0=true, but is not correct code.
4932 68. The host_aton() function was not handling scoped IPv6 addresses (those
4933 with, for example, "%eth0" on the end) correctly.
4935 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4936 negated items (that is, ~something) in unsigned ints. Some compilers
4937 apparently mutter when there is no cast.
4939 70. If an address verification called from an ACL failed, and did not produce a
4940 user-specific message (i.e. there was only a "system" message), nothing was
4941 put in $acl_verify_message. In this situation, it now puts the system
4944 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4945 session; change 4.31/43 added the unwanted input to the log line - except
4946 that it did not do this in the start of session case. It now does.
4948 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4949 This is wrong and can cause the other end to generate a synchronization
4950 error if it is another Exim or anything else that does the synchronization
4951 check. A QUIT command is no longer sent after a timeout.
4953 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4954 during host lookups.
4956 74. The defer_ok option of callout verification was not working if it was used
4957 when verifying addresses in header lines, that is, for this case:
4959 verify = header_sender/callout=defer_ok
4961 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4962 those file descriptors could be used for SMTP connections. If anything
4963 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4964 could be sent to the SMTP client, causing chaos. The daemon now opens
4965 stdin, stdout, and stderr to /dev/null when it puts itself into the
4968 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4969 log by default. The user can override this with suitable Perl magic.
4971 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4972 the log message when discard triggers, was not working for the DATA ACL or
4973 for the non-SMTP ACL.
4975 78. Error message wording change in sieve.c.
4977 79. If smtp_accept_max_per_host was set, the number of connections could be
4978 restricted to fewer than expected, because the daemon was trying to set up
4979 a new connection before checking whether the processes handling previous
4980 connections had finished. The check for completed processes is now done
4981 earlier. On busy systems, this bug wouldn't be noticed because something
4982 else would have woken the daemon, and it would have reaped the completed
4985 80. If a message was submitted locally by a user whose login name contained one
4986 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4987 It caused a spool format error. I have fixed the spool reading code. A
4988 related problem was that the "from" clause in the Received: line became
4989 illegal because of the space(s). It is now covered by ${quote_local_part.
4991 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4994 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4996 83. Patch from Sieve maintainer to fix unterminated string problem in
4997 "vacation" handling.
4999 84. Some minor changes to the Linux configuration files to help with other
5000 OS variants using glibc.
5002 85. One more patch for Sieve to update vacation handling to latest spec.
5005 ----------------------------------------------------
5006 See the note above about the 4.44 and 4.50 releases.
5007 ----------------------------------------------------
5013 1. Change 4.43/35 introduced a bug that caused file counts to be
5014 incorrectly computed when quota_filecount was set in an appendfile
5017 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5018 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5021 3. Give more explanation in the error message when the command for a transport
5022 filter fails to execute.
5024 4. There are several places where Exim runs a non-Exim command in a
5025 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5026 was being done only for the command run by the queryprogram router. It is
5027 now done for all such subprocesses. The other cases are: ${run, transport
5028 filters, and the commands run by the lmtp and pipe transports.
5030 5. Some older OS have a limit of 256 on the maximum number of file
5031 descriptors. Exim was using setrlimit() to set 1000 as a large value
5032 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5033 systems. I've change it so that if it can't get 1000, it tries for 256.
5035 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5036 was an oversight, and furthermore, ever since the addition of extra
5037 controls (e.g. 4.43/32), the checks on when to allow different forms of
5038 "control" were broken. There should now be diagnostics for all cases when a
5039 control that does not make sense is encountered.
5041 7. $recipients is now available in the predata ACL (oversight).
5043 8. Tidy the search cache before the fork to do a delivery from a message
5044 received from the command line. Otherwise the child will trigger a lookup
5045 failure and thereby defer the delivery if it tries to use (for example) a
5046 cached ldap connection that the parent has called unbind on.
5048 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5049 of $address_data from the recipient verification was clobbered by the
5050 sender verification.
5052 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5053 was its contents. (It was OK if the option was not defined at all.)
5055 11. A "Completed" log line is now written for messages that are removed from
5056 the spool by the -Mrm option.
5058 12. $host_address is now set to the target address during the checking of
5059 ignore_target_hosts.
5061 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5062 being passed; this would have caused $sender_host_name to have been used if
5063 matching the list had actually called for a host name (not very likely,
5064 since this list is usually IP addresses). A host name is now passed as
5067 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5068 code that specifies a non-restarting handler (typically sigaction() in
5069 modern systems) in an attempt to fix a rare and obscure crash bug.
5071 15. Narrowed the window for a race in the daemon that could cause it to ignore
5072 SIGCHLD signals. This is not a major problem, because they are used only to
5073 wake it up if nothing else does.
5075 16. A malformed maildirsize file could cause Exim to calculate negative values
5076 for the mailbox size or file count. Odd effects could occur as a result.
5077 The maildirsize information is now recalculated if the size or filecount
5080 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5081 support for a long time. Removed HAVE_SYS_VFS_H.
5083 18. Updated exipick to current release from John Jetmore.
5085 19. Allow an empty sender to be matched against a lookup in an address list.
5086 Previously the only cases considered were a regular expression, or an
5089 20. Exim went into a mad DNS lookup loop when doing a callout where the
5090 host was specified on the transport, if the DNS lookup yielded more than
5093 21. The RFC2047 encoding function was originally intended for short strings
5094 such as real names; it was not keeping to the 75-character limit for
5095 encoded words that the RFC imposes. It now respects the limit, and
5096 generates multiple encoded words if necessary. To be on the safe side, I
5097 have increased the buffer size for the ${rfc2047: expansion operator from
5100 22. Failure to deliver a bounce message always caused it to be frozen, even if
5101 there was an errors_to setting on the router. The errors_to setting is now
5104 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5105 canonical form (fully expanded) before being placed in
5106 $sender_host_address.
5108 24. Updated eximstats to version 1.33
5110 25. Include certificate and key file names in error message when GnuTLS fails
5111 to set them up, because the GnuTLS error message doesn't include the name
5112 of the failing file when there is a problem reading it.
5114 26. Expand error message when OpenSSL has problems setting up cert/key files.
5117 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5118 (this can affect the format of dates).
5120 28. exim_tidydb, when checking for the continued existence of a message for
5121 which it has found a message-specific retry record, was not finding
5122 messages that were in split spool directories. Consequently, it was
5123 deleting retry records that should have stayed in existence.
5125 29. eximstats updated to version 1.35
5126 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5127 1.35 - bugfix such that pie charts by volume are generated correctly
5129 30. The SPA authentication driver was not abandoning authentication and moving
5130 on to the next authenticator when an expansion was forced to fail,
5131 contradicting the general specification for all authenticators. Instead it
5132 was generating a temporary error. It now behaves as specified.
5134 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5135 (the order specifies the preference for clients). The order is now AES256,
5136 AES128, 3DES, ARCFOUR128.
5138 31. Small patch to Sieve code - explicitly set From: when generating an
5141 32. Exim crashed if a remote delivery caused a very long error message to be
5142 recorded - for instance if somebody sent an entire SpamAssassin report back
5143 as a large number of 550 error lines. This bug was coincidentally fixed by
5144 increasing the size of one of Exim's internal buffers (big_buffer) that
5145 happened as part of the Exiscan merge. However, to be on the safe side, I
5146 have made the code more robust (and fixed the comments that describe what
5149 33. Some experimental protocols are using DNS PTR records for new purposes. The
5150 keys for these records are domain names, not reversed IP addresses. The
5151 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5152 leaves it alone. Component reversal etc. now happens only for IP addresses.
5155 34. The host_aton() function is supposed to be passed a string that is known
5156 to be a valid IP address. However, in the case of IPv6 addresses, it was
5157 not checking this. This is a hostage to fortune. Exim now panics and dies
5158 if the condition is not met. A case was found where this could be provoked
5159 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5160 components; fortuitously, this particular loophole had already been fixed
5161 by change 4.50/55 or 4.44/33 above.
5163 If there are any other similar loopholes, the new check in host_aton()
5164 itself should stop them being exploited. The report I received stated that
5165 data on the command line could provoke the exploit when Exim was running as
5166 exim, but did not say which command line option was involved. All I could
5167 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5168 running as the user.
5171 35. There was a buffer overflow vulnerability in the SPA authentication code
5172 (which came originally from the Samba project). I have added a test to the
5173 spa_base64_to_bits() function which I hope fixes it.
5176 36. The daemon start-up calls getloadavg() while still root for those OS that
5177 need the first call to be done as root, but it missed one case: when
5178 deliver_queue_load_max is set with deliver_drop_privilege. This is
5179 necessary for the benefit of the queue runner, because there is no re-exec
5180 when deliver_drop_privilege is set.
5182 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5183 was in use, was not putting the data itself into the right store pool;
5184 consequently, it could be overwritten for a subsequent message in the same
5185 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5188 38. Sometimes the final signoff response after QUIT could fail to get
5189 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5190 < 0 before doing a fflush(). This bug looks as though it goes back to the
5191 introduction of TLS in release 3.20, but "sometimes" must have been rare
5192 because the tests only now provoked it.
5198 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5199 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5200 Now it returns an integer. A number of calls were still expecting a T/F
5201 return. Fortuitously, in all cases, the tests worked in OK situations,
5202 which is the norm. However, things would have gone wrong on any write
5203 failures on the smtp file descriptor. This function is used when sending
5204 messages over SMTP and also when doing verify callouts.
5206 2. When Exim is called to do synchronous delivery of a locally submitted
5207 message (the -odf or -odi options), it no longer closes stderr before doing
5210 3. Implemented the mua_wrapper option.
5212 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5214 5. Implemented the functions header_remove(), header_testname(),
5215 header_add_at_position(), and receive_remove_recipient(), and exported them
5218 6. If an ACL "warn" statement specified the addition of headers, Exim already
5219 inserted X-ACL-Warn: at the start if there was no header name. However, it
5220 was not making this test for the second and subsequent header lines if
5221 there were newlines in the string. This meant that an invalid header could
5222 be inserted if Exim was badly configured.
5224 7. Allow an ACL "warn" statement to add header lines at the start or after all
5225 the Received: headers, as well as at the end.
5227 8. Added the rcpt_4xx retry error code.
5229 9. Added postmaster_mailfrom=xxx to callout verification option.
5231 10. Added mailfrom=xxxx to the callout verification option, for verify=
5234 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5235 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5237 12. Inserted some casts to stop certain compilers warning when using pointer
5238 differences as field lengths or precisions in printf-type calls (mostly
5239 affecting debugging statements).
5241 13. Added optional readline() support for -be (dynamically loaded).
5243 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5244 same clock tick as a message's arrival, so that its received time was the
5245 same as the "first fail" time on the retry record, and that message
5246 remained on the queue past the ultimate address timeout, every queue runner
5247 would try a delivery (because it was past the ultimate address timeout) but
5248 after another failure, the ultimate address timeout, which should have then
5249 bounced the address, did not kick in. This was a "< instead of <=" error;
5250 in most cases the first failure would have been in the next clock tick
5251 after the received time, and all would be well.
5253 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5254 being recognized when the domain list was tested by the match_domain
5255 condition in an expansion string.
5257 16. Added the ${str2b64: operator.
5259 17. Exim was always calling setrlimit() to set a large limit for the number of
5260 processes, without checking whether the existing limit was already
5261 adequate. (It did check for the limit on file descriptors.) Furthermore,
5262 errors from getrlimit() and setrlimit() were being ignored. Now they are
5263 logged to the main and panic logs, but Exim does carry on, to try to do its
5264 job under whatever limits there are.
5266 18. Imported PCRE 5.0.
5268 19. Trivial typo in log message " temporarily refused connection" (the leading
5271 20. If the log selector return_path_on_delivery was set and an address was
5272 redirected to /dev/null, the delivery process crashed because it assumed
5273 that a return path would always be set for a "successful" delivery. In this
5274 case, the whole delivery is bypassed as an optimization, and therefore no
5277 21. Internal re-arrangement: the function for sending a challenge and reading
5278 a response while authentication was assuming a zero-terminated challenge
5279 string. It's now changed to take a pointer and a length, to allow for
5280 binary data in such strings.
5282 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5284 23. Exim was not respecting finduser_retries when seeking the login of the
5285 uid under which it was called; it was always trying 10 times. (The default
5286 setting of finduser_retries is zero.) Also, it was sleeping after the final
5287 failure, which is pointless.
5289 24. Implemented tls_on_connect_ports.
5291 25. Implemented acl_smtp_predata.
5293 26. If the domain in control=submission is set empty, Exim assumes that the
5294 authenticated id is a complete email address when it generates From: or
5295 Sender: header lines.
5297 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5298 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5299 chown and chgrp in /bin and hostname in /usr/bin.
5301 28. Exim was keeping the "process log" file open after each use, just as it
5302 does for the main log. This opens the possibility of it remaining open for
5303 long periods when the USR1 signal hits a daemon. Occasional processlog
5304 errors were reported, that could have been caused by this. Anyway, it seems
5305 much more sensible not to leave this file open at all, so that is what now
5308 29. The long-running daemon process does not normally write to the log once it
5309 has entered its main loop, and it closes the log before doing so. This is
5310 so that log files can straightforwardly be renamed and moved. However,
5311 there are a couple of unusual error situations where the daemon does write
5312 log entries, and I had neglected to close the log afterwards.
5314 30. The text of an SMTP error response that was received during a remote
5315 delivery was being truncated at 512 bytes. This is too short for some of
5316 the long messages that one sometimes sees. I've increased the limit to
5319 31. It is now possible to make retry rules that apply only when a message has a
5320 specific sender, in particular, an empty sender.
5322 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5323 it possible to be selective about when SMTP synchronization is enforced.
5325 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5327 32. Implemented hosts_connection_nolog.
5329 33. Added an ACL for QUIT.
5331 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5334 35. Added mailbox_size and mailbox_filecount to appendfile.
5336 36. Added control = no_multiline_responses to ACLs.
5338 37. There was a bug in the logic of the code that waits for the clock to tick
5339 in the case where the clock went backwards by a substantial amount such
5340 that the microsecond fraction of "now" was more than the microsecond
5341 fraction of "then" (but the whole seconds number was less).
5343 38. Added support for the libradius Radius client library this is found on
5344 FreeBSD (previously only the radiusclient library was supported).
5350 1. When certain lookups returned multiple values in the form name=value, the
5351 quoting of the values was not always being done properly. Specifically:
5352 (a) If the value started with a double quote, but contained no whitespace,
5354 (b) If the value contained whitespace other than a space character (i.e.
5355 tabs or newlines or carriage returns) it was not quoted.
5356 This fix has been applied to the mysql and pgsql lookups by writing a
5357 separate quoting function and calling it from the lookup code. The fix
5358 should probably also be applied to nisplus, ibase and oracle lookups, but
5359 since I cannot test any of those, I have not disturbed their existing code.
5361 2. A hit in the callout cache for a specific address caused a log line with no
5362 reason for rejecting RCPT. Now it says "Previous (cached) callout
5363 verification failure".
5365 3. There was an off-by-one bug in the queryprogram router. An over-long
5366 return line was truncated at 256 instead of 255 characters, thereby
5367 overflowing its buffer with the terminating zero. As well as fixing this, I
5368 have increased the buffer size to 1024 (and made a note to document this).
5370 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5371 when Exim is waiting for an SMTP response from a remote server, Exim
5372 restarts its select() call on the socket, thereby resetting its timeout.
5373 This is not a problem when such interrupts are rare. Somebody set up a cron
5374 job to run exiwhat every 2 minutes, which is less than the normal select()
5375 timeout (5 or 10 minutes). This meant that the select() timeout never
5376 kicked in because it was always reset. I have fixed this by comparing the
5377 time when an interrupt arrives with the time at the start of the first call
5378 to select(). If more time than the timeout has elapsed, the interrupt is
5379 treated as a timeout.
5381 5. Some internal re-factoring in preparation for the addition of Sieve
5382 extensions (by MH). In particular, the "personal" test is moved to a
5383 separate function, and given an option for scanning Cc: and Bcc: (which is
5384 not set for Exim filters).
5386 6. When Exim created an email address using the login of the caller as the
5387 local part (e.g. when creating a From: or Sender: header line), it was not
5388 quoting the local part when it contained special characters such as @.
5390 7. Installed new OpenBSD configuration files.
5392 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5393 try to make them clearer.
5395 9. Callout options, other than the timeout value, were being ignored when
5396 verifying sender addresses in header lines. For example, when using
5398 verify = header_sender/callout=no_cache
5400 the cache was (incorrectly) being used.
5402 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5403 only the Cygwin environment.
5405 11. When return_path_on_delivery was set as a log selector, if different remote
5406 addresses in the same message used different return paths and parallel
5407 remote delivery occurred, the wrong values would sometimes be logged.
5408 (Whenever a remote delivery process finished, the return path value from
5409 the most recently started remote delivery process was logged.)
5411 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5412 lines when AUTH and/or TLS are in use. This is the "received protocol"
5413 field. Exim used to use "asmtp" for authenticated SMTP, without any
5414 indication (in the protocol name) for TLS use. Now it follows the RFC and
5415 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5416 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5417 names appear in log lines as well as in Received: header lines.
5419 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5420 extensions, and comparison tests, and to fix some bugs.
5422 14. Changes to the "personal" filter test:
5424 (1) The test was buggy in that it was just doing the equivalent of
5425 "contains" tests on header lines. For example, if a user's address was
5426 anne@some.where, the "personal" test would incorrectly be true for
5428 To: susanne@some.where
5430 This test is now done by extracting each address from the header in turn,
5431 and checking the entire address. Other tests that are part of "personal"
5432 are now done using regular expressions (for example, to check local parts
5433 of addresses in From: header lines).
5435 (2) The list of non-personal local parts in From: addresses has been
5436 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5437 taken from the Sieve specification recommendations.
5439 (3) If the message contains any header line starting with "List-" it is
5440 treated as non-personal.
5442 (4) The test for "circular" in the Subject: header line has been removed
5443 because it now seems ill-conceived.
5445 15. Minor typos in src/EDITME comments corrected.
5447 16. Installed latest exipick from John Jetmore.
5449 17. If headers_add on a router specified a text string that was too long for
5450 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5451 of string_sprintf() is now avoided.
5453 18. $message_body_size was not set (it was always zero) when running the DATA
5454 ACL and the local_scan() function.
5456 19. For the "mail" command in an Exim filter, no default was being set for
5457 the once_repeat time, causing a random time value to be used if "once" was
5458 specified. (If the value happened to be <= 0, no repeat happened.) The
5459 default is now 0s, meaning "never repeat". The "vacation" command was OK
5460 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5461 (I found it when inspecting the code).
5463 20. There is now an overall timeout for performing a callout verification. It
5464 defaults to 4 times the callout timeout, which applies to individual SMTP
5465 commands during the callout. The overall timeout applies when there is more
5466 than one host that can be tried. The timeout is checked before trying the
5467 next host. This prevents very long delays if there are a large number of
5468 hosts and all are timing out (e.g. when the network connections are timing
5469 out). The value of the overall timeout can be changed by specifying an
5470 additional sub-option for "callout", called "maxwait". For example:
5472 verify = sender/callout=5s,maxwait=20s
5474 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5475 to the end before writing, but this should make it even safer).
5477 22. Exim was forgetting that it had advertised PIPELINING for the second and
5478 subsequent messages on an SMTP connection. It was also not resetting its
5479 memory on STARTTLS and an internal HELO.
5481 23. When Exim logs an SMTP synchronization error within a session, it now
5482 records whether PIPELINING has been advertised or not.
5484 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5485 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5486 rather than long int.
5488 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5490 26. Added the never_mail option to autoreply.
5496 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5497 crash if the getsockname() call failed; this can happen if a connection is
5498 closed very soon after it is established. The problem was simply in the
5499 order in which certain operations were done, causing Exim to try to write
5500 to the SMTP stream before it had set up the file descriptor. The bug has
5501 been fixed by making things happen in the correct order.
5507 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5508 before the connection was closed, thus losing the rejection response.
5510 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5511 some early Solaris releases, but causes trouble in current releases where
5512 socklen_t is defined.
5514 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5517 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5520 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5521 that releasing the top of it at the end releases what was used for sub-
5522 expansions (unless the block got too big). However, discard this block if
5523 the first thing is a variable or header, so that we can use its block when
5524 it is dynamic (useful for very large $message_headers, for example).
5526 6. Lookups now cache *every* query, not just the most recent. A new, separate
5527 store pool is used for this. It can be recovered when all lookup caches are
5528 flushed. Lookups now release memory at the end of their result strings.
5529 This has involved some general refactoring of the lookup sources.
5531 7. Some code has been added to the store_xxx() functions to reduce the amount
5532 of flapping under certain conditions.
5534 8. log_incoming_interface used to affect only the <= reception log lines. Now
5535 it causes the local interface and port to be added to several more SMTP log
5536 lines, for example "SMTP connection from", and rejection lines.
5538 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5540 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5542 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5543 could be overwritten at the end of the current message (or the start of a
5544 new message if it was set in a HELO ACL). The value is now preserved for
5545 the duration of the SMTP connection.
5547 12. If a transport had a headers_rewrite setting, and a matching header line
5548 contained an unqualified address, that address was qualified, even if it
5549 did not match any rewriting rules. The underlying bug was that the values
5550 of the flags that permit the existence of unqualified sender and recipient
5551 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5552 non-local messages, and by -bnq for local messages) were not being
5553 preserved with the message after it was received.
5555 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5556 "next input=" as part of the text comprising the host identity instead of
5557 the correct text. The code was using the same buffer for two different
5558 strings. However, depending on which order the printing function evaluated
5559 its arguments, the bug did not always show up. Under Linux, for example, my
5560 test suite worked just fine.
5562 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5563 doesn't work with some older versions of Perl. It has been changed to "my",
5564 which in any case is probably the better facility to use.
5566 15. A really picky compiler found some instances of statements for creating
5567 error messages that either had too many or two few arguments for the format
5570 16. The size of the buffer for calls to the DNS resolver has been increased
5571 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5572 for addresses that have a lot of PTR records. This alleviates a problem; it
5573 does not fully solve it.
5575 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5576 buffer now truncates the list and logs the incident, which is the same
5577 action as happens when Exim is looking up a host name and its aliases.
5578 Previously in this situation something unpredictable would happen;
5579 sometimes it was "internal error: store_reset failed".
5581 18. If a server dropped the connection unexpectedly when an Exim client was
5582 using GnuTLS and trying to read a response, the client delivery process
5583 crashed while trying to generate an error log message.
5585 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5586 string, for example:
5588 warn message = H1: something\nH2: something
5590 the text was added as a single header line from Exim's point of view
5591 though it ended up OK in the delivered message. However, searching for the
5592 second and subsequent header lines using $h_h2: did not work. This has been
5593 fixed. Similarly, if a system filter added multiple headers in this way,
5594 the routers could not see them.
5596 20. Expanded the error message when iplsearch is called with an invalid key to
5597 suggest using net-iplsearch in a host list.
5599 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5600 ACLs are no longer actually imposed (and a message to that effect is
5603 22. If a "gecos" field in a passwd entry contained escaped characters, in
5604 particular, if it contained a \" sequence, Exim got it wrong when building
5605 a From: or a Sender: header from that name. A second bug also caused
5606 incorrect handling when an unquoted " was present following a character
5607 that needed quoting.
5609 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5610 was not being matched caselessly.
5612 24. Arranged for all hyphens in the exim.8 source to be escaped with
5615 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5616 properly. Recipient callout cache records were still being keyed to include
5617 the sender, even when use_sender was set false. This led to far more
5618 callouts that were necessary. The sender is no longer included in the key
5619 when use_sender is false.
5621 26. Added "control = submission" modifier to ACLs.
5623 27. Added the ${base62d: operator to decode base 62 numbers.
5625 28. dnsdb lookups can now access SRV records.
5627 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5628 the configuration file.
5630 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5631 (-v) mode. This makes the output for a verbose queue run more intelligible.
5633 31. Added a use_postmaster feature to recipient callouts.
5635 32. Added the $body_zerocount variable, containing the number of binary zero
5636 bytes in the message body.
5638 33. The time of last modification of the "new" subdirectory is now used as the
5639 "mailbox time last read" when there is a quota error for a maildir
5642 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5644 35. Added +ignore_unknown as a special item in host lists.
5646 36. Code for decoding IPv6 addresses in host lists is now included, even if
5647 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5648 address was recognized as an IP address, but was then not correctly decoded
5649 into binary, causing unexpected and incorrect effects when compared with
5656 1. Very minor rewording of debugging text in manualroute to say "list of
5657 hosts" instead of "hostlist".
5659 2. If verify=header_syntax was set, and a header line with an unqualified
5660 address (no domain) and a large number of spaces between the end of the
5661 name and the colon was received, the reception process suffered a buffer
5662 overflow, and (when I tested it) crashed. This was caused by some obsolete
5663 code that should have been removed. The fix is to remove it!
5665 3. When running in the test harness, delay a bit after writing a bounce
5666 message to get a bit more predictability in the log output.
5668 4. Added a call to search_tidyup() just before forking a reception process. In
5669 theory, someone could use a lookup in the expansion of smtp_accept_max_
5670 per_host which, without the tidyup, could leave open a database connection.
5672 5. Added the variables $recipient_data and $sender_data which get set from a
5673 lookup success in an ACL "recipients" or "senders" condition, or a router
5674 "senders" option, similar to $domain_data and $local_part_data.
5676 6. Moved the writing of debug_print from before to after the "senders" test
5679 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5680 problems for message scanning, either using a data ACL, or using
5681 local_scan() because the Received: header was not generated till after they
5682 were called (in order to set the time as the time of reception completion).
5683 I have revised the way this works. The header is now generated after the
5684 body is received, but before the ACL or local_scan() are called. After they
5685 are run, the timestamp in the header is updated.
5691 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5692 before starting a queue runner without re-exec. This happened only when
5693 deliver_drop_privilege was set or when the Exim user was set to root. The
5694 effect of the bug was that timeouts during subsequent deliveries caused
5695 crashes instead of being properly handled. The handler is now left at its
5696 default (and expected) setting.
5698 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5699 message, again when deliver_drop_privilege is set or Exim is run as root.
5700 The bug described in (1) was not present in this case, but the tidying up
5701 of the other signals was missing. I have made the two cases consistent.
5703 3. The ignore_target_hosts setting on a manualroute router was being ignored
5704 for hosts that were looked up using the /MX notation.
5706 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5709 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5710 operated on the sender address. After changing the $sender_address to <>
5711 for the sender address verify, Exim was re-instated it as the original
5712 (before rewriting) address, but remembering that it had rewritten it, so it
5713 wasn't rewriting it again. This bug also had the effect of breaking the
5714 sender address verification caching when the sender address was rewritten.
5716 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5717 This has been changed so that if the ip literal address matches
5718 ignore_target_hosts, the router declines.
5720 7. Added expansion conditions match_domain, match_address, and match_local_
5721 part (NOT match_host).
5723 8. The placeholder for the Received: header didn't have a length field set.
5725 9. Added code to Exim itself and to exim_lock to test for a specific race
5726 condition that could lead to file corruption when using MBX delivery. The
5727 issue is with the lockfile that is created in /tmp. If this file is removed
5728 after a process has opened it but before that process has acquired a lock,
5729 there is the potential for a second process to recreate the file and also
5730 acquire a lock. This could lead to two Exim processes writing to the file
5731 at the same time. The added code performs the same test as UW imapd; it
5732 checks after acquiring the lock that its file descriptor still refers to
5733 the same named file.
5735 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5736 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5739 11. Added the smtp_active_hostname option. If used, this will typically be made
5740 to depend on the incoming interface address. Because $interface_address is
5741 not set up until the daemon has forked a reception process, error responses
5742 that can happen earlier (such as "too many connections") no longer contain
5745 12. If an expansion in a condition on a "warn" statement fails because a lookup
5746 defers, the "warn" statement is abandoned, and the next ACL statement is
5747 processed. Previously this caused the whole ACL to be aborted.
5749 13. Added the iplsearch lookup type.
5751 14. Added ident_timeout as a log selector.
5753 15. Added tls_certificate_verified as a log selector.
5755 16. Added a global option tls_require_ciphers (compare the smtp transport
5756 option of the same name). This controls incoming TLS connections.
5758 17. I finally figured out how to make tls_require_ciphers do a similar thing
5759 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5760 before starting the TLS session.
5762 18. Tabs are now shown as \t in -bP output.
5764 19. If the log selector return_path_on_delivery was set, Exim crashed when
5765 bouncing a message because it had too many Received: header lines.
5767 20. If two routers both had headers_remove settings, and the first one included
5768 a superfluous trailing colon, the final name in the first list and the
5769 first name in the second list were incorrectly joined into one item (with a
5770 colon in the middle).
5776 1. Added -C and -D options to the exinext utility, mainly to make it easier
5777 to include in the automated testing, but these could be helpful when
5778 multiple configurations are in use.
5780 2. The exinext utility was not formatting the output nicely when there was
5781 an alternate port involved in the retry record key, nor when there was a
5782 message id as well (for retries that were specific to a specific message
5783 and a specific host). It was also confused by IPv6 addresses, because of
5784 the additional colons they contain. I have fixed the IPv4 problem, and
5785 patched it up to do a reasonable job for IPv6.
5787 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5788 delivery, the log line now contains "pipelined" if PIPELINING was used.
5790 4. An SMTP transport process used to panic and die if the bind() call to set
5791 an explicit outgoing interface failed. This has been changed; it is now
5792 treated in the same way as a connect() failure.
5794 5. A reference to $sender_host_name in the part of a conditional expansion
5795 that was being skipped was still causing a DNS lookup. This no longer
5798 6. The def: expansion condition was not recognizing references to header lines
5799 that used bh_ and bheader_.
5801 7. Added the _cache feature to named lists.
5803 8. The code for checking quota_filecount in the appendfile transport was
5804 allowing one more file than it should have been.
5806 9. For compatibility with Sendmail, the command line option
5814 and sets the incoming protocol and host name (for trusted callers). The
5815 host name and its colon can be omitted when only the protocol is to be set.
5816 Note the Exim already has two private options, -pd and -ps, that refer to
5817 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5818 "s", but I don't think that's a major issue.
5820 10. A number of refactoring changes to the code, none of which should affect
5823 (a) The number of logging options was getting close to filling up the
5824 32-bit word that was used as a bit map. I have split them into two classes:
5825 those that are passed in the argument to log_write(), and those that are
5826 only ever tested independently outside of that function. These are now in
5827 separate 32-bit words, so there is plenty of room for expansion again.
5828 There is no change in the user interface or the logging behaviour.
5830 (b) When building, for example, log lines, the code previously used a
5831 macro that called string_cat() twice, in order to add two strings. This is
5832 not really sufficiently general. Furthermore, there was one instance where
5833 it was actually wrong because one of the argument was used twice, and in
5834 one call a function was used. (As it happened, calling the function twice
5835 did not affect the overall behaviour.) The macro has been replaced by a
5836 function that can join an arbitrary number of extra strings onto a growing
5839 (c) The code for expansion conditions now uses a table and a binary chop
5840 instead of a serial search (which was left over from when there were very
5841 few conditions). Also, it now recognizes conditions like "pam" even when
5842 the relevant support is not compiled in: a suitably worded error message is
5843 given if an attempt is made to use such a condition.
5845 11. Added ${time_interval:xxxxx}.
5847 12. A bug was causing one of the ddress fields not to be passed back correctly
5848 from remote delivery subprocesses. The field in question was not being
5849 subsequently used, so this caused to problems in practice.
5851 13. Added new log selectors queue_time and deliver_time.
5853 14. Might have fixed a bug in maildirsizefile handling that threw up
5854 "unexpected character" debug warnings, and recalculated the data
5855 unnecessarily. In any case, I expanded the warning message to give more
5858 15. Added the message "Restricted characters in address" to the statements in
5859 the default ACL that block characters like @ and % in local parts.
5861 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5862 Three changes have been made:
5864 (a) There was a serious bug; a negative response to MAIL caused the whole
5865 recipient domain to be cached as invalid, thereby blocking all messages
5866 to all local parts at the same domain, from all senders. This bug has
5867 been fixed. The domain is no longer cached after a negative response to
5868 MAIL if the sender used is not empty.
5870 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5873 (c) A new callout option, "use_sender" has been added for people who want
5874 the modified behaviour.
5880 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5883 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5884 indeed breaks things for older releases.
5886 3. Added additional logging to the case where there is a problem reading data
5887 from a filter that is running in a subprocess using a pipe, in order to
5888 try to track down a specific problem.
5890 4. Testing facility fudge: when running in the test harness and attempting
5891 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5892 getting "No route to host". Convert this to a timeout.
5894 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5897 6. Some OS don't have socklen_t but use size_t instead. This affects the
5898 fifth argument of getsockopt() amongst other things. This is now
5899 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5900 can be set for individual OS. I have set it for SunOS5, OSF1, and
5901 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5902 some earlier ones do not.
5904 7. Change 4.30/15 was not doing the test caselessly.
5906 8. The standard form for an IPv6 address literal was being rejected by address
5907 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5908 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5909 this, as well as the form without the "IPv6" on the front (but only when
5910 address literals are enabled, of course).
5912 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5914 10. Exim crashed if a message with an empty sender address specified by -f
5915 encountered a router with an errors_to setting. This could be provoked only
5916 by a command such as
5920 where an empty string was supplied; "<>" did not hit this bug.
5922 11. Installed PCRE release 4.5.
5924 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5925 remained set. It is now erased.
5927 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5928 times from message ids (which are base 36 rather than the normal 62).
5930 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5931 were being counted as actual protocol errors, and logged if the log
5932 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5933 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5934 and DATA following a set of rejected RCPTs do not count as protocol errors.
5935 In other words, Exim assumes they were pipelined, though this may not
5936 actually be the case. Of course, in all cases the client gets an
5937 appropriate error code.
5939 15. If a lookup fails in an ACL condition, a message about the failure may
5940 be available; it is used if testing the ACL cannot continue, because most
5941 such messages specify what the cause of the deferral is. However, some
5942 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5943 that caused an old message to be retained and used if a later statement
5944 caused a defer, replacing the real cause of the deferral.
5946 16. If an IP address had so many PTR records that the DNS lookup buffer
5947 was not large enough to hold them, Exim could crash while trying to process
5948 the truncated data. It now detects and logs this case.
5950 17. Further to 4.21/58, another change has been made: if (and only if) the
5951 first line of a message (the first header line) ends with CRLF, a bare LF
5952 in a subsequent header line has a space inserted after it, so as not to
5953 terminate the header.
5955 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5956 unnecessarily, used atoi() instead of strtol(), and didn't check the
5957 termination when getting file sizes from file names by regex.
5959 19. Completely re-implemented the support for maildirsize files, in the light
5960 of a number of problems with the previous contributed implementation
5961 (4.30/29). In particular:
5963 . If the quota is zero, the maildirsize file is maintained, but no quota is
5966 . If the maildir directory does not exist, it is created before any attempt
5967 to write a maildirsize file.
5969 . The quota value in the file is just a cache; if the quota is changed in
5970 the transport, the new value overrides.
5972 . A regular expression is available for excluding directories from the
5975 20. The autoreply transport checks the characters in options that define the
5976 message's headers; it allows continued headers, but it was checking with
5977 isspace() after an embedded newline instead of explicitly looking for a
5980 21. If all the "regular" hosts to which an address was routed had passed their
5981 expiry times, and had not reached their retry times, the address was
5982 bounced, even if fallback hosts were defined. Now Exim should go on to try
5985 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5986 equivalent code in the SMTP transport. Some hosts send humungous responses
5987 to HELO/EHLO, more than 1024 it seems.
5989 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5990 gives compiler warnings in some environments. I've now done it "properly",
5993 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5994 (because of problems with the built-in one) was declared to return uschar *
5995 instead of char *, causing compiler failure.
5997 25. Fixed a file descriptor leak when processing alias/forward files.
5999 26. Fixed a minor format string issue in dbfn.c.
6001 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6003 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6004 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6007 29. When a sender address is verified, it is cached, to save repeating the test
6008 when there is more than one recipient in a message. However, when the
6009 verification involves a callout, it is possible for different callout
6010 options to be set for different recipients. It is too complicated to keep
6011 track of this in the cache, so now Exim always runs a verification when a
6012 callout is required, relying on the callout cache for the optimization.
6013 The overhead is duplication of the address routing, but this should not be
6016 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6017 to be verified with callout=postmaster, and the main callout worked but the
6018 postmaster check failed, the verification correctly failed. However, if a
6019 subsequent RCPT command asked for sender verification *without* the
6020 postmaster check, incorrect caching caused this verification also to fail,
6023 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6024 it was not caching the DNS options (qualify_single, search_parents) that
6025 were used when the lookup failed. A subsequent lookup with different
6026 options therefore always gave the same answer, though there were cases
6027 where it should not have. (Example: a "domains = !$mx_any" option on a
6028 dnslookup router: the "domains" option is always processed without any
6029 widening, but the router might have qualify_single set.) Now Exim uses the
6030 cached value only when the same options are set.
6032 32. Added John Jetmore's "exipick" utility to the distribution.
6034 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6035 than a timeout (e.g. a certificate is required, and is not provided), an
6036 Exim server now closes the connection immediately. Previously it waited for
6037 the client to close - but if the client is SSL, it seems that they each
6038 wait for each other, leading to a delay before one of them times out.
6040 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6041 maintained 0.8.x compatibility because I don't think many are using it, and
6042 it is clearly obsolete.
6044 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6047 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6048 client certificate was expired. A simple patch fixes this, though I don't
6049 understand the full logic of why the verify callback is called multiple
6052 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6053 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6054 which causes problems with some clients (such as the Certicom SSL Plus
6055 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6056 disables the coutermeasure allowing Eudora to connect."
6058 38. Exim was not checking that a write() to a log file succeeded. This could
6059 lead to Bad Things if a log got too big, in particular if it hit a file
6060 size limit. Exim now panics and dies if it cannot write to a log file, just
6061 as it does if it cannot open a log file.
6063 39. Modified OS/Makefile-Linux so that it now contains
6065 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6067 The two -D definitions ensure that Exim is compiled with large file
6068 support, which makes it possible to handle log files that are bigger than
6071 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6072 instance) a domain was checked against a named list that involved a lookup,
6073 causing $domain_data to be set, then another domain was checked against the
6074 same list, then the first domain was re-checked, the value of $domain_data
6075 after the final check could be wrong. In particular, if the second check
6076 failed, it could be set empty. This bug probably also applied to
6079 41. The strip_trailing_dot option was not being applied to the address given
6080 with the -f command-line option.
6082 42. The code for reading a message's header from the spool was incrementing
6083 $received_count, but never initializing it. This meant that the value was
6084 incorrect (doubled) while delivering a message in the same process in which
6085 it was received. In the most common configuration of Exim, this never
6086 happens - a fresh exec is done - but it can happen when
6087 deliver_drop_privilege is set.
6089 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6090 it now includes up to 150 characters of the unexpected data in the log
6093 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6094 and building data strings. The size of both of these buffers was 10 000
6095 bytes - far larger than anybody would *ever* want, thought I. Needless to
6096 say, somebody hit the limit. I have increased the maximum line length to
6097 20 000 and the maximum data length of concatenated lines to 100 000. I have
6098 also fixed two bugs, because there was no checking on these buffers. Tsk,
6099 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6100 buffer is too small.
6102 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6103 lsearch lookups. Now it does.
6105 46. When parsing a route_list item in a manualroute router, a fixed-length
6106 buffer was used for the list of hosts. I made this 1024 bytes long,
6107 thinking that nobody would ever have a list of hosts that long. Wrong.
6108 Somebody had a whole pile of complicated expansion conditions, and the
6109 string was silently truncated, leading to an expansion error. It turns out
6110 that it is easier to change to an unlimited length (owing to other changes
6111 that have happened since this code was originally written) than to build
6112 structure for giving a limitation error. The length of the item that
6113 expands into the list of hosts is now unlimited.
6115 47. The lsearch lookup could not handle data where the length of text line was
6116 more than 4095 characters. Such lines were truncated, leading to shortened
6117 data being returned. It should now handle lines of any length.
6119 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6120 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6123 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6124 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6125 no longer happens in comment lines. A list of replacements is now placed
6126 at the head of all of the source files, except those whose only change is
6127 to replace PERL_COMMAND in the very first #! line.
6129 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6130 messages on the queue, with a bottom-up merge sort, using code contributed
6131 by Michael Haardt. This should make operations like -bp somewhat faster on
6132 large queues. It won't affect queue runners, except when queue_run_in_order
6135 51. Installed eximstats 1.31 in the distribution.
6137 52. Added support for SRV lookups to the dnslookup router.
6139 53. If an ACL referred to $message_body or $message_body_end, the value was not
6140 reset for any messages that followed in the same SMTP session.
6142 54. The store-handling optimization for building very long strings was not
6143 differentiating between the different store pools. I don't think this
6144 actually made any difference in practice, but I've tidied it.
6146 55. While running the routers to verify a sender address, $sender_address
6147 was still set to the sender address. This is wrong, because when routing to
6148 send a bounce to the sender, it would be empty. Therefore, I have changed
6149 it so that, while verifying a sender address, $sender_address is set to <>.
6150 (There is no change to what happens when verifying a recipient address.)
6152 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6153 target A or AAAA records (if not already returned) without resetting the
6154 qualify_single or search_parents options of the DNS resolver. These are
6155 inappropriate in this case because the targets of MX and SRV records must
6156 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6157 target that, when qualified, matched something in the local domain. These
6158 two options are now turned off when doing these lookups.
6160 57. It seems that at least some releases of Reiserfs (which does not have the
6161 concept of a fixed number of inodes) returns zero and not -1 for the
6162 number of available inodes. This interacted badly with check_spool_inodes,
6163 which assumed that -1 was the "no such thing" setting. What I have done is
6164 to check that the total number of inodes is greater than zero before doing
6165 the test of how many are available.
6167 58. When a "warn" ACL statement has a log_message modifier, the message is
6168 remembered, and not repeated. This is to avoid a lot of repetition when a
6169 message has many recipients that cause the same warning to be written.
6170 However, Exim was preserving the list of already written lines for an
6171 entire SMTP session, which doesn't seem right. The memory is now reset if a
6172 new message is started.
6174 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6175 debugging output unless log_rewrite was also set.
6177 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6178 of (int)(handle) when we know that handle contains (void *)(-1).
6180 61. The Exim daemon panic-logs an error return when it closes the incoming
6181 connection. However "connection reset by peer" seems to be common, and
6182 isn't really an error worthy of noting specially, so that particular error
6185 62. When Exim is trying to find all the local interfaces, it used to panic and
6186 die if the ioctl to get the interface flags failed. However, it seems that
6187 on at least one OS (Solaris 9) it is possible to have an interface that is
6188 included in the list of interfaces, but for which you get a failure error
6189 for this call. This happens when the interface is not "plumbed" into a
6190 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6191 failure of the "get flags" call assumes that the interface is down.
6193 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6194 makes life easier for people who are doing arithmetic on fields extracted
6195 from dates, where you often get leading zeros that should not be
6196 interpreted as octal.
6198 64. Added qualify_domain to the redirect router, to override the global
6201 65. If a pathologically long header line contained very many addresses (the
6202 report of this problem mentioned 10 000) and each of them was rewritten,
6203 Exim could use up a very large amount of memory. (It kept on making new
6204 copies of the header line as it rewrote, and never released the old ones.)
6205 At the expense of a bit more processing, the header rewriting function has
6206 been changed so that it no longer eats memory in this way.
6208 66. The generation of the Received: header has been moved from the time that a
6209 message starts to be received, to the time that it finishes. The timestamp
6210 in the Received: header should now be very close to that of the <= log
6211 line. There are two side-effects of this change:
6213 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6214 logged header lines no longer include the local Received: line, because
6215 it has not yet been created. The same applies to a copy of the message
6216 that is returned to a non-SMTP sender when a message is rejected.
6218 (b) When a filter file is tested using -bf, no additional Received: header
6219 is added to the test message. After some thought, I decided that this
6222 This change does not affect the value of $received_for. It is still set
6223 after address rewriting, but before local_scan() is called.
6225 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6227 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6228 gave an unhelpful panic error message, and a defer error. I have managed to
6229 change this behaviour so that it now rejects any supplied certificate,
6230 which seems right, as the list of acceptable certificates is empty.
6232 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6233 gave an unhelpful defer error. I have not managed to make this reject any
6234 supplied certificates, but the error message it gives is "no certificate
6235 supplied", which is not helpful.
6237 70. exigrep's output now also includes lines that are not associated with any
6238 message, but which match the given pattern. Implemented by a patch from
6239 Martin Sluka, which also tidied up the Perl a bit.
6241 71. Recipient callout verification, like sender verification, was using <> in
6242 the MAIL FROM command. This isn't really the right thing, since the actual
6243 sender may affect whether the remote host accepts the recipient or not. I
6244 have changed it to use the actual sender in the callout; this means that
6245 the cache record is now keyed on a recipient/sender pair, not just the
6246 recipient address. There doesn't seem to be a real danger of callout loops,
6247 since a callout by the remote host to check the sender would use <>.
6248 [SEE ABOVE: changed after hitting problems.]
6250 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6251 temporary errors. However, in the case of such a code being given after
6252 the end of a data transmission (i.e. after ".") Exim was failing to write
6253 a retry record for the message. (Yes, there was some broken host that was
6254 actually sending 8xx at this point.)
6256 73. An unknown lookup type in a host list could cause Exim to panic-die when
6257 the list was checked. (An example that provoked this was putting <; in the
6258 middle of a list instead of at the start.) If this happened during a DATA
6259 ACL check, a -D file could be left lying around. This kind of configuration
6260 error no longer causes Exim to die; instead it causes a defer error. The
6261 incident is still logged to the main and panic logs.
6263 74. Buglet left over from Exim 3 conversion. The message "too many messages
6264 in one connection" was written to the rejectlog but not the mainlog, except
6265 when address rewriting (yes!) was being logged.
6267 75. Added write_rejectlog option.
6269 76. When a system filter was run not as root (that is, when system_filter_user
6270 was set), the values of the $n variables were not being returned to the
6271 main process; thus, they were not subsequently available in the $sn
6274 77. Added +return_path_on_delivery log selector.
6276 78. A connection timeout was being treated differently from recipients deferred
6277 when testing hosts_max_try with a message that was older than the host's
6278 retry timeout. (The host should not be counted, thus allowing all hosts to
6279 be tried at least once before bouncing.) This may have been the cause of an
6280 occasionally reported bug whereby a message would remain on the queue
6281 longer than the retry timeout, but would be bounced if a delivery was
6282 forced. I say "may" because I never totally pinned down the problem;
6283 setting up timeout/retry tests is difficult. See also the next item.
6285 79. The ultimate address timeout was not being applied to errors that involved
6286 a combination of host plus message (for example, a timeout on a MAIL
6287 command). When an address resolved to a number of possible hosts, and they
6288 were not all tried for each delivery (e.g. because of hosts_max_try), a
6289 message could remain on the queue longer than the retry timeout.
6291 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6294 81. Fixed an obscure SMTP outgoing bug which required at least the following
6295 conditions: (a) there was another message waiting for the same server;
6296 (b) the server returned 5xx to all RCPT commands in the first message so
6297 that the message was not completed; (c) the server dropped the connection
6298 or gave a negative response to the RSET that Exim sends to abort the
6299 transaction. The observed case was a dropped connection after DATA that had
6300 been sent in pipelining mode. That is, the server had advertised PIPELINING
6301 but was not implementing it correctly. The effect of the bug was incorrect
6302 behaviour, such as trying another host, and this could lead to a crash.
6308 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6309 and daemon.c were passed as pointers to ints; they should have been
6310 pointers to socklen_t variables (which are typically unsigned ints).
6312 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6315 3. Fixed a really odd bug that affected only the testing scheme; patching a
6316 certain fixed string in the binary changed the value of another string that
6317 happened to be identical to the end of the original first string.
6319 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6320 name", it returns that address as the IP address. On some operating
6321 systems (e.g. Solaris), it also passes back the IP address string as the
6322 "host name". However, on others (e.g. Linux), it passes back an empty
6323 string. Exim wasn't checking for this, and was changing the host name to an
6324 empty string, assuming it had been canonicalized.
6326 5. Although rare, it is permitted to have more than one PTR record for a given
6327 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6328 all the names associated with an address, because they do in Solaris.
6329 However, it seems that they do not in Linux for data that comes from the
6330 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6331 I found this out when I moved to a new Linux workstation and tried to run
6332 the Exim test suite.
6334 To get round this problem I have changed the code so that it now does its
6335 own call to the DNS to look up PTR records when searching for a host name.
6336 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6337 addresses that are only in /etc/hosts are still found.
6339 This behaviour is, however, controlled by an option called host_lookup_
6340 order, which defaults to "bydns:byaddr". If people want to use the other
6341 order, or indeed, just use one or the other means of lookup, they can
6342 specify it in this variable.
6344 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6345 some operating systems, this comes back from gethostbyaddr() as an empty
6346 string, and this is what Exim used to test for. However, it seems that in
6347 other systems, "." is yielded. Exim now tests for this case too.
6349 7. The values of check_spool_space and check_log_space are now held internally
6350 as a number of kilobytes instead of an absolute number of bytes. If a
6351 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6352 kilobyte. This means that much larger values can be stored.
6354 8. Exim monitor: an attempt to get the action menu when not actually pointing
6355 at a message produces an empty menu entitled "No message selected". This
6356 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6357 no entries in it ("Shell widget menu has zero width and/or height"). So I
6358 have added a single, blank menu entry in this case.
6360 9. Added ${quote_local_part.
6362 10. MIME decoding is now applied to the contents of Subject: header lines when
6365 11. Now that a reference to $sender_host_address automatically causes a reverse
6366 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6367 host lookup before query-style lookups in lists that might use this
6368 variable. This has therefore been abolished, and the "net-" prefix is no
6369 longer necessary for query-style lookups.
6371 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6372 have been a typo for LFLAGS, so it has been changed.
6374 13. The install script calls Exim with "-C /dev/null" in order to find the
6375 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6376 to be output. However, since Exim outputs its version number before the
6377 error, it didn't break the script. It just looked ugly. I fixed this by
6378 always allowing "-C /dev/null" if the caller is root.
6380 14. Ignore overlarge ACL variable number when reading spool file - insurance
6381 against a later release with more variables having written the file.
6383 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6384 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6385 this, as well as the form without the "IPv6" on the front.
6387 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6388 OS/Makefile-Darwin file.
6390 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6391 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6393 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6394 variable. However, some OS use ints for inodes. I've added cast to long int
6395 to get rid of the compiler warning.
6397 19. I had forgotten to lock out "/../" in configuration file names when
6398 ALT_CONFIG_PREFIX was set.
6400 20. Routers used for verification do not need to specify transports. However,
6401 if such a router generated a host list, and callout was configured, Exim
6402 crashed, because it could not find a port number from the (non-existent)
6403 transport. It now assumes port 25 in this circumstance.
6405 21. Added the -t option to exigrep.
6407 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6408 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6409 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6410 them is set, LOOKUP_LSEARCH is forced.
6412 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6414 24. Added sender and host information to the "rejected by local_scan()" log
6415 line; previously there was no indication of these.
6417 25. Added .include_if_exists.
6419 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6420 Linux. It turns out that not all file systems support this. Apparently some
6421 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6422 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6423 not supported on the file descriptor, is now ignored when Exim is trying to
6424 sync a directory. This applies only to Linux.
6426 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6428 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6429 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6432 29. Added support for maildirsize files from supplied patch (modified a bit).
6434 30. The use of :fail: followed by an empty string could lead Exim to respond to
6435 sender verification failures with (e.g.):
6437 550 Verification failed for <xxx>
6438 550 Sender verify failed
6440 where the first response line was missing the '-' that indicates it is not
6441 the final line of the response.
6443 31. The loop for finding the name of the user that called Exim had a hardwired
6444 limit of 10; it now uses the value of finduser_retries, which is used for
6445 all other user lookups.
6447 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6450 33. Exim was neglecting to zero errno before one call of strtol() when
6451 expanding a string and expecting an integer value. On some systems this
6452 resulted in spurious "integer overflow" errors. Also, it was casting the
6453 result into an int without checking.
6455 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6456 did not work. The code looks as if it has *never* worked, though it appears
6457 to have been documented since at least release 1.62. I have made it work.
6459 35. The "timeout_DNS" error in retry rules, also documented since at least
6460 1.62, also never worked. As it isn't clear exactly what this means, and
6461 clearly it isn't a major issue, I have abolished the feature by treating it
6462 as "timeout", and writing a warning to the main and panic logs.
6464 36. The display of retry rules for -brt wasn't always showing the error code
6467 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6468 timeout_connect_A, timeout_connect_MX.
6470 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6471 to the empty sender.
6473 39. The daemon was not analysing the content of -oX till after it had closed
6474 stderr and disconnected from the controlling terminal. This meant that any
6475 syntax errors were only noted on the panic log, and the return code from
6476 the command was 0. By re-arranging the code a little, I've made the
6477 decoding happen first, so such errors now appear on stderr, and the return
6478 code is 1. However, the actual setting up of the sockets still happens in
6479 the disconnected process, so errors there are still only recorded on the
6482 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6483 connections (as happens on some IP stacks) was logged at start up time as
6484 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6485 it from "IPv6 and IPv4", which means that two separate sockets are being
6488 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6489 says whether AF_INET or AF_INET6 was passed as an argument.
6491 42. Exiwhat output was messed up when time zones were included in log
6494 43. Exiwhat now gives more information about the daemon's listening ports,
6495 and whether -tls-on-connect was used.
6497 44. The "port" option of the smtp transport is now expanded.
6499 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6500 silently ignored. Now an error message is written to the main and panic
6503 46. There's a new ACL modifier called "logwrite" which writes to a log file
6504 as soon as it is encountered.
6506 47. Added $local_user_uid and $local_user_gid at routing time.
6508 48. Exim crashed when trying to verify a sender address that was being
6511 49. Exim was recognizing only a space character after ".include". It now also
6512 recognizes a tab character.
6514 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6515 extracting the relevant information from the specification. The man page no
6516 longer contains scrambled data for the -d option, and I've added a section
6517 at the front about calling Exim under different names.
6519 51. Added "extra_headers" argument to the "mail" command in filter files.
6521 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6524 53. Installed eximstats 1.29.
6526 54. Added transport_filter_timeout as a generic transport option.
6528 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6529 Cc: header lines. This was required by RFC 822, but it not required by RFC
6532 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6533 incoming messages that did not have them. Now it does so only if the
6534 message originates locally, that is, if there is no associated remote host
6535 address. When Resent- header lines are present, this applies to the Resent-
6536 lines rather than the non-Resent- lines.
6538 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6539 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6541 58. Messages for configuration errors now include the name of the main
6542 configuration file - useful now that there may be more than one file in a
6543 list (.included file names were always shown).
6545 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6546 for those rare installations that do not start the daemon as root or run it
6547 setuid root. I've cut out the call to initgroups() if the daemon is not
6550 60. The Exim user and group can now be bound into the binary as text strings
6551 that are looked up at the start of Exim's processing.
6553 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6555 62. Added $mailstore_basename variable.
6557 63. Installed patch to sieve.c from Michael Haardt.
6559 64. When Exim failed to open the panic log after failing to open the main log,
6560 the original message it was trying to log was written to stderr and debug
6561 output, but if they were not available (the usual case in production), it
6562 was lost. Now it is written to syslog before the two lines that record the
6563 failures to open the logs.
6565 65. Users' Exim filters run in subprocesses under the user's uid. It is
6566 possible for a "deliver" command or an alias in a "personal" command to
6567 provoke an address rewrite. If logging of address rewriting is configured,
6568 this fails because the process is not running as root or exim. There may be
6569 a better way of dealing with this, but for the moment (because 4.30 needs
6570 to be released), I have disabled address rewrite logging when running a
6571 filter in a non-root, non-exim process.
6577 1. The buildconfig auxiliary program wasn't quoting the value set for
6578 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6579 not defined. This bug was masked in 4.22 by the effect that was fixed in
6582 2. Some messages that were rejected after a message id was allocated were
6583 shown as "incomplete" by exigrep. It no longer does this for messages that
6584 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6586 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6587 have allow_domain_literals set, the ID did not get logged in the <= line.
6588 Domain literals are now always recognized in Message-ID: header lines.
6590 4. The first argument for a ${extract expansion item is the key name or field
6591 number. Leading and trailing spaces in this item were not being ignored,
6592 causing some misleading effects.
6594 5. When deliver_drop_privilege was set, single queue runner processes started
6595 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6596 same command in the process it spins off) were not dropping privilege.
6598 6. When the daemon running as "exim" started a queue runner, it always
6599 re-executed Exim in the spun-off process. This is a waste of effort when
6600 deliver_drop_privilege is set. The new process now just calls the
6601 queue-runner function directly.
6607 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6610 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6611 ignored. Though the use of -oP was forcing the writing of a pid file, it
6612 was always written to the default place.
6614 3. If the message "no IP address found for host xxxx" is generated during
6615 incoming verification, it is now followed by identification of the incoming
6616 connection (so you can more easily find what provoked it).
6618 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6620 5. Added some features to "harden" Exim a bit more against certain attacks:
6622 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6623 be put in Local/Makefile. This is like the never_users runtime option,
6624 but it cannot be overridden. The default setting is "root".
6626 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6627 prefix string with which any file named in a -C command line option
6630 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6631 is retained for -C and -D only if the caller of Exim is root. Without
6632 it, the exim user may also use -C and -D and retain privilege.
6634 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6635 command line option is disabled.
6637 6. Macro names set by the -D option must start with an upper case letter, just
6638 like macro names defined in the configuration file.
6640 7. Added "dereference=" facility to LDAP.
6642 8. Two instances of the typo "uknown" in the source files are fixed.
6644 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6645 the Configure-Makefile script screwed up while processing it.
6647 10. Incorporated PCRE 4.4.
6649 11. The SMTP synchronization check was not operating right at the start of an
6650 SMTP session. For example, it could not catch a HELO sent before the client
6651 waited for the greeting. There is now a check for outstanding input at the
6652 point when the greeting is written. Because of the duplex, asynchronous
6653 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6654 way, but not yet received, when the check is performed.
6656 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6657 on TCP/IP sockets, because this apparently causes some broken clients to
6660 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6661 unchanged) from the Cygwin maintainer.
6663 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6664 was supported instead of testing for mbx. Effectively a typo.
6666 15. The spa authenticator server code was not checking that the input it
6667 received was valid base64.
6669 16. The debug output line for the "set" modifier in ACLs was not showing the
6670 name of the variable that was being set.
6672 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6674 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6675 lookup on its own. Something else was needed to trigger the lookup. For
6676 example, a match in host_lookup or the need for a host name in a host list.
6677 Now, if $sender_host_name is referenced and the host name has not yet been
6678 looked up, a lookup is performed. If the lookup fails, the variable remains
6679 empty, and $host_lookup_failed is set to "1".
6681 19. Added "eqi" as a case-independent comparison operator.
6683 20. The saslauthd authentication condition could segfault if neither service
6684 nor realm was specified.
6686 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6687 error message that was logged was misleading, and incoming SMTP
6688 connections were dropped. The message is now more accurate, and temporary
6689 errors are given to SMTP connections.
6691 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6692 (except RSET) with a 421 error, until QUIT is received. However, it was
6693 failing to send a response to QUIT.
6695 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6696 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6697 ACL is now run after the helo_try_verify_hosts code.
6699 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6700 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6701 case-independent, so other case variants are also recognized). Apparently
6702 some systems use these upper case variants.
6704 25. If more than two messages were waiting for the same host, and a transport
6705 filter was specified for the transport, Exim sent two messages over the
6706 same TCP/IP connection, and then failed with "socket operation on non-
6707 socket" when it tried to send the third.
6709 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6711 27. The extern definition of crypt16() in expand.c was not being excluded when
6712 the OS had its own crypt16() function.
6714 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6715 as a preferred synonym for return_size_limit, both as an option and as an
6718 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6720 30. Changed the default configuration ACL to relax the local part checking rule
6721 for addresses that are not in any local domains. For these addresses,
6722 slashes and pipe symbols are allowed within local parts, but the sequence
6723 /../ is explicitly forbidden.
6725 31. SPA server authentication was not clearing the challenge buffer before
6728 32. log_message in a "warn" ACL statement was writing to the reject log as
6729 well as to the main log, which contradicts the documentation and doesn't
6730 seem right (because no rejection is happening). So I have stopped it.
6732 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6733 However, I am unable to do any testing of this.
6735 34. Fixed an infelicity in the appendfile transport. When checking directories
6736 for a mailbox, to see if any needed to be created, it was accidentally
6737 using path names with one or more superfluous leading slashes; tracing
6738 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6740 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6741 contents are added to the log line that is written for every discarded
6742 recipient. (Previously a log_message setting was ignored.)
6744 36. The ${quote: operator now quotes the string if it is empty.
6746 37. The install script runs exim in order to find its version number. If for
6747 some reason other than non-existence or emptiness, which it checks, it
6748 could not run './exim', it was installing it with an empty version number,
6749 i.e. as "exim-". This error state is now caught, and the installation is
6752 38. An argument was missing from the function that creates an error message
6753 when Exim fails to connect to the socket for saslauthd authentication.
6754 This could cause Exim to crash, or give a corrupted message.
6756 39. Added isip, isip4, and isip6 to ${if conditions.
6758 40. The ACL variables $acl_xx are now saved with the message, and can be
6759 accessed later in routers, transports, and filters.
6761 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6762 strings in the file are not string-expanded.
6764 42. If a MAIL command specified a SIZE value that was too large to fit into an
6765 int variable, the check against message_size_limit failed. Such values are
6766 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6767 day this will have to be increased, but I don't think I want to be around
6768 when emails are that large.
6775 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6776 iconv() is not standard in FreeBSD.
6778 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6779 IPv6 enabled. The observed symptom was a segmentation fault on return from
6780 the function os_common_find_running_interfaces() in src/os.c.
6782 3. In the check_special_case() function in daemon.c I had used "errno" as an
6783 argument name, which causes warnings on some systems. This was basically a
6784 typo, since it was named "eno" in the comments!
6786 4. The code that waits for the clock to tick (at a resolution of some fraction
6787 of a second) so as to ensure message-id uniqueness was always waiting for
6788 at least one whole tick, when it could have waited for less. [This is
6789 almost certainly not relevant at current processor speeds, where it is
6790 unlikely to ever wait at all. But we try to future-proof.]
6792 5. The function that sleeps for a time interval that includes fractions of a
6793 second contained a race. It did not block SIGALRM between setting the
6794 timer, and suspending (a couple of lines later). If the interval was short
6795 and the sigsuspend() was delayed until after it had expired, the suspension
6796 never ended. On busy systems this could lead to processes getting stuck for
6799 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6800 process, before it forks any delivery processes. The open lookup caching
6801 mechanism meant that the open file or database connection was passed into
6802 the delivery process. The problem was that delivery processes always tidy
6803 up cached lookup data. This could cause a problem for the next delivery
6804 process started by the queue runner, because the external queue runner
6805 process does not know about the closure. So the next delivery process
6806 still has data in the lookup cache. In the case of a file lookup, there was
6807 no problem because closing a file descriptor in a subprocess doesn't affect
6808 the parent. However, if the lookup was caching a connection to a database,
6809 the connection was closed, and the second delivery process was likely to
6810 see errors such as "PGSQL: query failed: server closed the connection
6811 unexpectedly". The problem has been fixed by closing all cached lookups
6812 in a queue runner before running a delivery process.
6814 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6815 seem to have the "const" qualifier which it has on other OS. I've
6818 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6819 *of the same type* (client or server) with the same public name that an
6820 error should be diagnosed.
6822 9. When Exim looked up a host name for an IP address, but failed to find the
6823 original IP address when looking up the host name (a safety check), it
6824 output the message "<ip address> does not match any IP for NULL", which was
6825 confusing, to say the least. The bug was that the host name should have
6826 appeared instead of "NULL".
6828 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6829 user that is built into the binary, and the -C or -D options is used, root
6830 privilege is dropped before the configuration file is read. In addition,
6831 logging is switched to stderr instead of the normal log files. If the
6832 configuration then re-defines the Exim user, the unprivileged environment
6833 is probably not what is expected, so Exim logs a panic warning message (but
6836 However, if deliver_drop_privilege is set, the unprivileged state may well
6837 be exactly what is intended, so the warning has been cut out in that case,
6838 and Exim is allowed to try to write to its normal log files.
6844 1. smtp_return_error_details was not giving details for temporary sender
6845 or receiver verification errors.
6847 2. Diagnose a configuration error if two authenticators have the same public
6850 3. Exim used not to create the message log file for a message until the first
6851 delivery attempt. This could be confusing when incoming messages were held
6852 for policy or load reasons. The message log file is now created at the time
6853 the message is received, and an initial "Received" line is written to it.
6855 4. The automatically generated man page for command line options had a minor
6856 bug that caused no ill effects; however, a more serious problem was that
6857 the procedure for building the man page automatically didn't always
6858 operate. Consequently, release 4.20 contains an out-of-date version. This
6859 shouldn't happen again.
6861 5. When building Exim with embedded Perl support, the script that builds the
6862 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6863 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6865 6. The freeze_tell option was not being used for messages that were frozen on
6866 arrival, either by an ACL or by local_scan().
6868 7. Added the smtp_incomplete_transaction log selector.
6870 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6871 was accepting AUTH without a new EHLO.
6873 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6874 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6877 10. Logging of TCP/IP connections (when configured) now happens in the main
6878 daemon process instead of the child process, so that the TCP/IP connection
6879 count is more accurate (but it can never be perfect).
6881 11. The use of "drop" in a nested ACL was not being handled correctly in the
6882 outer ACL. Now, if condition failure induced by the nested "drop" causes
6883 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6884 or "require"), the connection is dropped.
6886 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6887 that yield "discard" can now be used with an "accept" or a "discard" verb,
6888 but an error is generated for any others (because I can't see a useful way
6889 to define what should happen).
6891 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6892 are now processed in the same way as lines in the Exim configuration file.
6893 In particular, continuation lines are supported.
6895 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6897 15. Added -ti meaning -t -i.
6899 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6900 domains, and warn by logging if others are found.
6902 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6903 returned from GIFCONF when Exim is trying to find the list of interfaces on
6904 a host. The code in os.c has been modified to copy each ifreq to an aligned
6905 structure in all cases.
6907 Also, in some cases, the returned ifreq's were being copied to a 'struct
6908 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6909 means the last couple of bytes of an IPv6 address could be chopped if the
6910 ifreq contained only a normal sockaddr (14 bytes storage).
6912 18. Named domain lists were not supported in the hosts_treat_as_local option.
6913 An entry such as +xxxx was not recognized, and was treated as a literal
6916 19. Ensure that header lines added by a DATA ACL are included in the reject log
6917 if the ACL subsequently rejects the message.
6919 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6920 MD5 (which is deprecated).
6922 21. When testing a filter file using -bf, Exim was writing a message when it
6923 took the sender from a "From " line in the message, but it was not doing so
6924 when it took $return_path from a Return-Path: header line. It now does.
6926 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6927 with a valid header line field name (a series of printing characters
6928 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6930 23. Changed "disc" in the source to "disk" to conform to the documentation and
6931 the book and for uniformity.
6933 24. Ignore Sendmail's -Ooption=value command line item.
6935 25. When execve() failed while trying to run a command in a pipe transport,
6936 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6937 could be confused with a return value of 69 from the command itself. This
6938 has been changed to 127, the value the shell returns if it is asked to run
6939 a non-existent command. The wording for the related log line suggests a
6940 non-existent command as the problem.
6942 26. If received_header_text expands to an empty string, do not add a Received:
6943 header line to the message. (Well, it adds a token one on the spool, but
6944 marks it "old" so that it doesn't get used or transmitted.)
6946 27. Installed eximstats 1.28 (addition of -nt option).
6948 28. There was no check for failure on the call to getsockname() in the daemon
6949 code. This can fail if there is a shortage of resources on the system, with
6950 ENOMEM, for example. A temporary error is now given on failure.
6952 29. Contrary to the C standard, it seems that in some environments, the
6953 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6954 program. Exim now does this explicitly; it affects the formatting of
6955 timestamps using strftime().
6957 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6958 complaints. I've now initialized all the variables, to avoid this.
6960 32. Header lines added by a system filter were not being "seen" during
6961 transport-time rewrites.
6963 33. The info_callback() function passed to OpenSSL is set up with type void
6964 (*)(SSL *, int, int), as described somewhere. However, when calling the
6965 function (actually a macro) that sets it up, the type void(*)() is
6966 expected. I've put in a cast to prevent warnings from picky compilers.
6968 34. If a DNS black list lookup found a CNAME record, but there were no A
6969 records associated with the domain it pointed at, Exim crashed.
6971 35. If a DNS black list lookup returned more than one A record, Exim ignored
6972 all but the first. It now scans all returned addresses if a particular IP
6973 value is being sought. In this situation, the contents of the
6974 $dnslist_value variable are a list of all the addresses, separated by a
6977 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6978 to accept a host name and all its aliases if the forward lookup for any of
6979 them yielded the IP address of the incoming connection. Now it accepts only
6980 those names whose forward lookup yields the correct IP address. Any other
6981 names are discarded. This closes a loophole whereby a rogue DNS
6982 administrator could create reverse DNS records to break through a
6983 wildcarded host restriction in an ACL.
6985 37. If a user filter or a system filter that ran in a subprocess used any of
6986 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6987 the wrong values were passed to the pipe command ($thisaddress had the
6988 value of $0, $0 had the value of $1, etc). This bug was introduced by
6989 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6991 38. Improved the line breaking for long SMTP error messages from ACLs.
6992 Previously, if there was no break point between 40 and 75 characters, Exim
6993 left the rest of the message alone. Two changes have been made: (a) I've
6994 reduced the minimum length to 35 characters; (b) if it can't find a break
6995 point between 35 and 75 characters, it looks ahead and uses the first one
6996 that it finds. This may give the occasional overlong line, but at least the
6997 remaining text gets split now.
6999 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7000 file descriptors might be low, and that setting 1000 would always raise it.
7001 It turns out that in some environments, the limit is already over 1000 and
7002 that lowering it causes trouble. So now Exim takes care not to decrease it.
7004 40. When delivering a message, the value of $return_path is set to $sender_
7005 address at the start of routing (routers may change the value). By an
7006 oversight, this default was not being set up when an address was tested by
7007 -bt or -bv, which affected the outcome if any router or filter referred to
7010 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7011 log only when "message" or "log_message" are set. However, if one of the
7012 conditions was an address verification, or a call to a nested ACL, the
7013 messages generated by the underlying test were being passed through. This
7014 no longer happens. The underlying message is available in $acl_verify_
7015 message for both "message" and "log_message" expansions, so it can be
7016 passed through if needed.
7018 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7019 new expansion $bh_ to give the encoded byte string without charset
7020 translation. Translation happens only if iconv() is available; HAVE_ICONV
7021 indicates this at build time. HEADERS_CHARSET gives the charset to
7022 translate to; headers_charset can change it in the configuration, and
7023 "headers charset" can change it in an individual filter file.
7025 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7026 that creates RFC 2047 encoded "words" labels them as that charset instead
7027 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7028 expansion operator; (ii) when Exim creates a From: line for a local
7029 message; (iii) when a header line is rewritten to include a "phrase" part.
7031 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7032 buggy, causing it to skip the first lines of messages whose message ID
7033 ended in 'D'. This would not have bitten before Exim release 4.14, because
7034 message IDs were unlikely to end in 'D' before then. The effect was to have
7035 incorrect size information for certain domains.
7037 45. #include "config.h" was missing at the start of the crypt16.c module. This
7038 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7041 46. If there was a timeout during a "random" callout check, Exim treated it as
7042 a failure of the random address, and carried on sending RSET and the real
7043 address. If the delay was just some slowness somewhere, the response to the
7044 original RCPT would be taken as a response to RSET and so on, causing
7045 mayhem of various kinds.
7047 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7048 when I implemented it. It didn't allow for the fact that some option values
7049 may legitimately be negative (e.g. size_addition), and it didn't even do
7050 the right test for positive values.
7052 48. Domain names in DNS records are case-independent. Exim always looks them up
7053 in lower case. Some resolvers return domain names in exactly the case they
7054 appear in the zone file, that is, they may contain uppercase letters. Not
7055 all resolvers do this - some return always lower case. Exim was treating a
7056 change of case by a resolver as a change of domain, similar to a widening
7057 of a domain abbreviation. This triggered its re-routing code and so it was
7058 trying to route what was effectively the same domain again. This normally
7059 caused routing to fail (because the router wouldn't handle the domain
7060 twice). Now Exim checks for this case specially, and just changes the
7061 casing of the domain that it ultimately uses when it transmits the message
7064 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7067 50. If a filter generated a file delivery with a non-absolute name (possible if
7068 no home directory exists for the router), the forbid_file option was not
7071 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7072 the existing equality matching.
7074 52. Exim was using ints instead of ino_t variables in some places where it was
7075 dealing with inode numbers.
7077 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7078 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7079 called TMPDIR, and if it finds it is different, it changes its value.
7081 54. The smtp_printf() function is now made available to local_scan() so
7082 additional output lines can be written before returning. There is also an
7083 smtp_fflush() function to enable the detection of a dropped connection.
7084 The variables smtp_input and smtp_batched_input are exported to
7087 55. Changed the default runtime configuration: the message "Unknown user"
7088 has been removed from the ACL, and instead placed on the localuser router,
7089 using the cannot_route_message feature. This means that any verification
7090 failures that generate their own messages won't get overridden. Similarly,
7091 the "Unrouteable address" message that was in the ACL for unverifiable
7092 relay addresses has also been removed.
7094 56. Added hosts_avoid_esmtp to the smtp transport.
7096 57. The exicyclog script was not checking for the esoteric option
7097 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7098 will work only if exicyclog is run under the appropriate euid.
7100 58. Following a discussion on the list, the rules by which Exim recognises line
7101 endings on incoming messages have been changed. The -dropcr and drop_cr
7102 options are now no-ops, retained only for backwards compatibility. The
7103 following line terminators are recognized: LF CRLF CR. However, special
7104 processing applies to CR:
7106 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7107 nor a local message in the state where . is a terminator.
7109 (ii) If a bare CR is encountered in a header line, an extra space is added
7110 after the line terminator so as not to end the header. The reasoning
7111 behind this is that bare CRs in header lines are most likely either
7112 to be mistakes, or people trying to play silly games.
7114 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7115 was being incorrectly given as 18 bytes larger than it should have been.
7116 This is a VOB (very old bug).
7118 60. This may never have affected anything current, but just in case it has:
7119 When the local host is found other than at the start of a list of hosts,
7120 the local host, those with the same MX, and any that follow, are discarded.
7121 When the list in question was part of a longer list of hosts, the following
7122 hosts (not currently being processed) were also being discarded. This no
7123 longer happens. I'm not sure if this situation could ever has previously
7126 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7129 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7130 header. This is something that is recommended in a new Internet Draft, and
7131 is something that is documented as being done by Sendmail. There are two
7132 possible values. For messages generated by the autoreply transport, Exim
7135 Auto-Submitted: auto-replied
7137 whereas for all other generated messages (e.g. bounces) it adds
7139 Auto-Submitted: auto-generated
7141 63. The "personal" condition in filters now includes a test for the
7142 Auto-Submitted: header. If it contains the string "auto-" the message it
7143 not considered personal.
7145 64. Added rcpt_include_affixes as a generic transport option.
7147 65. Added queue_only_override (default true).
7149 66. Added the syslog_duplication option.
7151 67. If what should have been the first header line of a message consisted of
7152 a space followed by a colon, Exim was mis-interpreting it as a header line.
7153 It isn't of course - it is syntactically invalid and should therefore be
7154 treated as the start of the message body. The misbehaviour could have
7155 caused a number of strange effects, including loss of data in subsequent
7156 header lines, and spool format errors.
7158 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7159 client host had authenticated. This control can now be exercised by an ACL
7160 for more flexibility.
7162 69. By default, callouts do not happen when testing with -bh. There is now a
7163 variant, -bhc, which does actually run the callout code, including
7164 consulting and updating the callout cache.
7166 70. Added support for saslauthd authentication, courtesy of Alexander
7169 71. If statvfs() failed on the spool or log directories while checking their
7170 size for availability, Exim confusingly gave the error "space shortage".
7171 Furthermore, in debugging mode it crashed with a floating point exception.
7172 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7173 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7174 serious problem, Exim now writes to the main and panic logs when this
7175 happens, with details of the failure. It then refuses to accept the
7176 incoming message, giving the message "spool directory problem" or "log
7177 directory problem" with a 421 code for SMTP messages.
7179 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7180 0, 1, and 2 exist, because some OS complain for execs without them (see
7181 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7182 descriptors. However, the code omitted to check that the open succeeded,
7183 causing mysterious errors if for some reason the permissions on /dev/null
7184 got screwed. Now Exim writes a message to the main and panic logs, and
7185 bombs out if it can't open /dev/null.
7187 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7188 interact so that it is all more flexible. It is supposed to remain
7189 backwards compatible. Also added extra_local_interfaces.
7191 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7192 to bomb out with an assertion failure - to the client this appears as a
7193 connection drop. This problem occurs in the part of the code that was taken
7194 from the Samba project. Fortunately, the assertion is in a very simple
7195 function, so I have fixed this by reproducing the function inline in the
7196 one place where it is called, and arranging for authentication to fail
7197 instead of killing the process with assert().
7199 75. The SPA client code was not working when the server requested OEM rather
7200 than Unicode encoding.
7202 76. Added code to make require_files with a specific uid setting more usable in
7203 the case where statting the file as root fails - usually a non-root-mounted
7204 NFS file system. When this happens and the failure is EACCES, Exim now
7205 forks a subprocess and does the per-uid checking as the relevant uid.
7207 77. Added process_log_path.
7209 78. If log_file_path was not explicitly set, a setting of check_log_space or
7210 check_log_inodes was ignored.
7212 79. If a space check for the spool or log partitions fails, the incident is now
7213 logged. Of course, in the latter case the data may get lost...
7215 80. Added the %p formatting code to string_format() so that it can be used to
7216 print addresses in debug_print(). Adjusted all the address printing in the
7217 debugging in store.c to use %p rather than %d.
7219 81. There was a concern that a line of code in smtp_in.c could overflow a
7220 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7221 initially expressed, the concern was not well-founded, because trailing
7222 spaces are removed early. However, if the trailing spaces were followed by
7223 a NULL, they did not get removed, so the overflow was possible. Two fixes
7226 (a) I re-wrote the offending code in a cleaner fashion.
7227 (b) If an incoming SMTP command contains a NULL character, it is rejected
7230 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7231 runs initgroups(), so that if the Exim user is in any additional groups,
7232 they will be used during message reception.
7238 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob