1 Change log file for Exim from version 4.21
2 -------------------------------------------
7 PP/01 Handle short writes when writing local log-files.
8 In practice, only affects FreeBSD (8 onwards).
9 Bugzilla 1053, with thanks to Dmitry Isaikin.
11 NM/01 Bugzilla 949 - Documentation tweak
13 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
16 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
18 PP/02 Implemented gsasl authenticator.
20 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
22 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
23 `pkg-config foo` for cflags/libs.
25 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
26 with rest of GSASL and with heimdal_gssapi.
28 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
29 `pkg-config foo` for cflags/libs for the TLS implementation.
31 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
32 properties get this fed in as external SSF. A number of robustness
33 and debugging improvements to the cyrus_sasl authenticator.
35 PP/08 cyrus_sasl server now expands the server_realm option.
37 PP/09 Bugzilla 1214 - Log authentication information in reject log.
38 Patch by Jeremy Harris.
40 PP/10 Added dbmjz lookup type.
42 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
44 PP/12 MAIL args handles TAB as well as SP, for better interop with
45 non-compliant senders.
46 Analysis and variant patch by Todd Lyons.
48 NM/04 Bugzilla 1237 - fix cases where printf format usage no indicated
49 Bug report from Lars Müller <lars@samba.org> (via SUSE),
50 Patch from Dirk Mueller <dmueller@suse.com>
52 PP/13 tls_peerdn now print-escaped for spool files.
53 Observed some $tls_peerdn in wild which contained \n, which resulted
54 in spool file corruption.
56 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
57 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
58 or write after TLS renegotiation, which otherwise led to messages
61 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
62 as a tracking header (ie: a signed header comes before the signature).
63 Patch from Wolfgang Breyha.
65 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
66 comma-sep list; embedded commas doubled.
68 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
70 Report and patch from Dmitry Banschikov.
76 PP/01 Solaris build fix for Oracle's LDAP libraries.
77 Bugzilla 1109, patch from Stephen Usher.
79 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
81 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
84 TF/02 Fix a couple more cases where we did not log the error message
85 when unlink() failed. See also change 4.74-TF/03.
87 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
88 lock up or crash if it happened to be inside a call to libc when it
89 got a SIGUSR1 from exiwhat.
91 The SIGUSR1 handler appends the current process status to the process
92 log which is later printed by exiwhat. It used to use the general
93 purpose logging code to do this, but several functions it calls are
96 The new output code in the SIGUSR1 handler is specific to the process
97 log, and simple enough that it's easy to inspect for signal safety.
98 Removing some special cases also simplifies the general logging code.
99 Removing the spurious timestamps from the process log simplifies
102 TF/04 Improved ratelimit ACL condition.
104 The /noupdate option has been deprecated in favour of /readonly which
105 has clearer semantics. The /leaky, /strict, and /readonly update modes
106 are mutually exclusive. The update mode is no longer included in the
107 database key; it just determines when the database is updated. (This
108 means that when you upgrde Exim will forget old rate measurements.)
110 Exim now checks that the per_* options are used with an update mode that
111 makes sense for the current ACL. For example, when Exim is processing a
112 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
113 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
114 must specify per_mail/readonly. If you omit the update mode it defaults to
115 /leaky where that makes sense (as before) or /readonly where required.
117 The /noupdate option is now undocumented but still supported for
118 backwards compatibility. It is equivalent to /readonly except that in
119 ACLs where /readonly is required you may specify /leaky/noupdate or
120 /strict/noupdate which are treated the same as /readonly.
122 A useful new feature is the /count= option. This is a generalization
123 of the per_byte option, so that you can measure the throughput of other
124 aggregate values. For example, the per_byte option is now equivalent
125 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
127 The per_rcpt option has been generalized using the /count= mechanism
128 (though it's more complicated than the per_byte equivalence). When it is
129 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
130 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
131 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
132 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
133 Note that using per_rcpt with a non-readonly update mode in more than
134 one ACL will cause the recipients to be double-counted. (The per_mail
135 and per_byte options don't have this problem.)
137 The handling of very low rates has changed slightly. If the computed rate
138 is less than the event's count (usually one) then this event is the first
139 after a long gap. In this case the rate is set to the same as this event's
140 count, so that the first message of a spam run is counted properly.
142 The major new feature is a mechanism for counting the rate of unique
143 events. The new per_addr option counts the number of different
144 recipients that someone has sent messages to in the last time period. It
145 behaves like per_rcpt if all the recipient addresses are different, but
146 duplicate recipient addresses do not increase the measured rate. Like
147 the /count= option this is a general mechanism, so the per_addr option
148 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
149 example, measure the rate that a client uses different sender addresses
150 with the options per_mail/unique=$sender_address. There are further
151 details in the main documentation.
153 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
155 TF/06 Removed a few PCRE remnants.
157 TF/07 Automatically extract Exim's version number from tags in the git
158 repository when doing development or release builds.
160 PP/02 Raise smtp_cmd_buffer_size to 16kB.
161 Bugzilla 879. Patch from Paul Fisher.
163 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
164 Heavily based on revision 40f9a89a from Simon Arlott's tree.
167 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
169 PP/05 Variable $av_failed, true if the AV scanner deferred.
170 Bugzilla 1078. Patch from John Horne.
172 PP/06 Stop make process more reliably on build failure.
173 Bugzilla 1087. Patch from Heiko Schlittermann.
175 PP/07 Make maildir_use_size_file an _expandable_ boolean.
176 Bugzilla 1089. Patch from Heiko Schlittermann.
178 PP/08 Handle ${run} returning more data than OS pipe buffer size.
179 Bugzilla 1131. Patch from Holger Weiß.
181 PP/09 Handle IPv6 addresses with SPF.
182 Bugzilla 860. Patch from Wolfgang Breyha.
184 PP/10 GnuTLS: support TLS 1.2 & 1.1.
186 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
189 PP/11 match_* no longer expand right-hand-side by default.
190 New compile-time build option, EXPAND_LISTMATCH_RHS.
191 New expansion conditions, "inlist", "inlisti".
193 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
195 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
197 PP/14 fix log_write() format string regression from TF/03.
198 Bugzilla 1152. Patch from Dmitry Isaikin.
204 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
206 PP/02 Harmonised TLS library version reporting; only show if debugging.
207 Layout now matches that introduced for other libraries in 4.74 PP/03.
209 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
211 PP/04 New "dns_use_edns0" global option.
213 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
216 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
217 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
219 TK/01 Updated PolarSSL code to 0.14.2.
220 Bugzilla 1097. Patch from Andreas Metzler.
222 PP/07 Catch divide-by-zero in ${eval:...}.
225 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
228 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
229 format-string attack -- SECURITY: remote arbitrary code execution.
231 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
232 time unintentionally subject to list matching rules, letting the header
233 cause arbitrary Exim lookups (of items which can occur in lists, *not*
234 arbitrary string expansion). This allowed for information disclosure.
236 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
237 INT_MIN/-1 -- value coerced to INT_MAX.
243 NM/01 Workround for PCRE version dependency in version reporting
246 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
247 This fixes portability to compilers other than gcc, notably
248 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
250 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
251 makefiles for portability to HP-UX and POSIX correctness.
253 PP/01 Permit LOOKUP_foo enabling on the make command-line.
254 Also via indented variable definition in the Makefile.
255 (Debugging by Oliver Heesakkers).
257 PP/02 Restore caching of spamd results with expanded spamd_address.
258 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
260 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
261 Improves build reliability. Fix from: Frank Elsner
263 NM/02 Fix wide character breakage in the rfc2047 coding
264 Fixes bug 1064. Patch from Andrey N. Oktyabrski
266 NM/03 Allow underscore in dnslist lookups
267 Fixes bug 1026. Patch from Graeme Fowler
269 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
270 Code patches from Adam Ciarcinski of NetBSD.
272 NM/04 Fixed exiqgrep to cope with mailq missing size issue
275 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
276 is logged, to avoid truncation. Patch from John Horne.
278 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
279 Patch from Jakob Hirsch.
281 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
282 SQL string expansion failure details.
283 Patch from Andrey Oktyabrski.
285 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
286 Patch from Simon Arlott.
288 PP/09 New lookups functionality failed to compile on old gcc which rejects
289 extern declarations in function scope.
290 Patch from Oliver Fleischmann
292 PP/10 Use sig_atomic_t for flags set from signal handlers.
293 Check getgroups() return and improve debugging.
294 Fixed developed for diagnosis in bug 927 (which turned out to be
297 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
298 Patch from Mark Zealey.
300 PP/12 Bugzilla 1056: Improved spamd server selection.
301 Patch from Mark Zealey.
303 PP/13 Bugzilla 1086: Deal with maildir quota file races.
304 Based on patch from Heiko Schlittermann.
306 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
307 Patch from Uwe Doering, sign-off by Michael Haardt.
309 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
310 variable declaration deep within a block. Bug and patch from
313 PP/15 lookups-Makefile IRIX compatibilty coercion.
315 PP/16 Make DISABLE_DKIM build knob functional.
317 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
318 Patch by Simon Arlott
320 TF/03 Fix valgrind.h portability to C89 compilers that do not support
321 variable argument macros. Our copy now differs from upstream.
327 TF/01 Failure to get a lock on a hints database can have serious
328 consequences so log it to the panic log.
330 TF/02 Log LMTP confirmation messages in the same way as SMTP,
331 controlled using the smtp_confirmation log selector.
333 TF/03 Include the error message when we fail to unlink a spool file.
335 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
336 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
337 for maintaining out-of-tree patches for some time.
339 PP/01 Bugzilla 139: Documentation and portability issues.
340 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
341 Handle per-OS dynamic-module compilation flags.
343 PP/02 Let /dev/null have normal permissions.
344 The 4.73 fixes were a little too stringent and complained about the
345 permissions on /dev/null. Exempt it from some checks.
346 Reported by Andreas M. Kirchwitz.
348 PP/03 Report version information for many libraries, including
349 Exim version information for dynamically loaded libraries. Created
350 version.h, now support a version extension string for distributors
351 who patch heavily. Dynamic module ABI change.
353 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
354 privilege escalation vulnerability whereby the Exim run-time user
355 can cause root to append content of the attacker's choosing to
358 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
361 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
362 If dropping privileges for untrusted macros, we disabled normal logging
363 on the basis that it would fail; for the Exim run-time user, this is not
364 the case, and it resulted in successful deliveries going unlogged.
365 Fixed. Reported by Andreas Metzler.
371 PP/01 Date: & Message-Id: revert to normally being appended to a message,
372 only prepend for the Resent-* case. Fixes regression introduced in
373 Exim 4.70 by NM/22 for Bugzilla 607.
375 PP/02 Include check_rfc2047_length in configure.default because we're seeing
376 increasing numbers of administrators be bitten by this.
378 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
380 PP/03 Bugzilla 994: added openssl_options main configuration option.
382 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
384 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
386 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
388 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
389 without a peer certificate, leading to a segfault because of an
390 assumption that peers always have certificates. Be a little more
391 paranoid. Problem reported by Martin Tscholak.
393 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
394 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
395 NB: ClamAV planning to remove STREAM in "middle of 2010".
396 CL also introduces -bmalware, various -d+acl logging additions and
397 more caution in buffer sizes.
399 PP/09 Implemented reverse_ip expansion operator.
401 PP/10 Bugzilla 937: provide a "debug" ACL control.
403 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
405 PP/12 Bugzilla 973: Implement --version.
407 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
409 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
411 PP/15 Bugzilla 816: support multiple condition rules on Routers.
413 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
414 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
415 ignore trailing whitespace.
417 JJ/02 prevent non-panic DKIM error from being sent to paniclog
419 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
422 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
423 Notification from Dr Andrew Aitchison.
425 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
426 ExtendedDetectionInfo response format.
427 Notification from John Horne.
429 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
432 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
433 XSL and documented dependency on system catalogs, with examples of how
436 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
439 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
440 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
441 configuration file which is writeable by the Exim user or group.
443 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
444 of configuration files to cover files specified with the -C option if
445 they are going to be used with root privileges, not just the default
448 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
449 option (effectively making it always true).
451 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
452 files to be used while preserving root privileges.
454 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
455 that rogue child processes cannot use them.
457 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
458 run-time user, instead of root.
460 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
461 Exim run-time user without dropping privileges.
463 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
464 result string, instead of calling string_vformat() twice with the same
467 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
468 for other users. Others should always drop root privileges if they use
469 -C on the command line, even for a whitelisted configure file.
471 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
473 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
479 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
480 $data_path, and $header_path variables; fixed documentation bugs and
483 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
484 exipick to access non-standard spools, including the "frozen" queue
487 NM/01 Bugzilla 965: Support mysql stored procedures.
488 Patch from Alain Williams
490 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
492 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
493 Patch from Andreas Metzler
495 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
496 Patch from Kirill Miazine
498 NM/05 Bugzilla 671: Added umask to procmail example.
500 JJ/03 installed exipick 20100323.0, fixing doc bug
502 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
503 directory. Notification and patch from Dan Rosenberg.
505 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
507 TK/02 Improve log output when DKIM signing operation fails.
509 MH/01 Treat the transport option dkim_domain as a colon separated
510 list, not as a single string, and sign the message with each element,
511 omitting multiple occurences of the same signer.
513 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
514 Bugzilla 985, 986. Patch by Simon Arlott
516 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
517 Patch by Simon Arlott
519 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
520 MBX locking. Notification from Dan Rosenberg.
526 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
528 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
530 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
532 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
534 NM/04 Bugzilla 915: Flag broken perl installation during build.
540 TK/01 Added patch by Johannes Berg that expands the main option
541 "spamd_address" if it starts with a dollar sign.
543 TK/02 Write list of recipients to X-Envelope-Sender header when building
544 the mbox-format spool file for content scanning (suggested by Jakob
547 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
548 (http://www.dcc-servers.net/) support via dccifd. Activated by
549 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
551 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
552 by Mark Daniel Reidel <mr@df.eu>.
554 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
555 When building exim an external PCRE library is now needed -
556 PCRE is a system library on the majority of modern systems.
557 See entry on PCRE_LIBS in EDITME file.
559 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
560 conversation. Added nologin parameter to request.
561 Patch contributed by Kirill Miazine.
563 TF/01 Do not log submission mode rewrites if they do not change the address.
565 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
567 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
568 log files in place. Contributed by Roberto Lima.
570 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
572 TF/03 Bugzilla 615: When checking the local_parts router precondition
573 after a local_part_suffix or local_part_prefix option, Exim now
574 does not use the address's named list lookup cache, since this
575 contains cached lookups for the whole local part.
577 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
578 Robert Millan. Documentation is in experimental-spec.txt.
580 TF/04 Bugzilla 668: Fix parallel build (make -j).
582 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
584 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
585 Patch provided by Jan Srzednicki.
587 TF/05 Leading white space used to be stripped from $spam_report which
588 wrecked the formatting. Now it is preserved.
590 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
591 that they are available at delivery time.
593 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
595 TF/08 TLS error reporting now respects the incoming_interface and
596 incoming_port log selectors.
598 TF/09 Produce a more useful error message if an SMTP transport's hosts
599 setting expands to an empty string.
601 NM/06 Bugzilla 744: EXPN did not work under TLS.
602 Patch provided by Phil Pennock.
604 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
605 Patch provided by Richard Godbee.
607 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
608 acl_smtp_notquit, added index entry.
610 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
611 Patch provided by Eugene Bujak.
613 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
614 accept(). Patch provided by Maxim Dounin.
616 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
617 Patch provided by Phil Pennock.
619 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
621 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
622 Patch provided by Brad "anomie" Jorsch.
624 NM/14 Bugzilla 622: Added timeout setting to transport filter.
625 Patch provided by Dean Brooks.
627 TK/05 Add native DKIM support (does not depend on external libraries).
629 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
630 Patch provided by Graeme Fowler.
632 NM/16 Bugzilla 851: Documentation example syntax fix.
634 NM/17 Changed NOTICE file to remove references to embedded PCRE.
636 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
639 NM/19 Bugzilla 745: TLS version reporting.
640 Patch provided by Phil Pennock.
642 NM/20 Bugzilla 167: bool: condition support.
643 Patch provided by Phil Pennock.
645 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
646 clients. Patch provided by Phil Pennock.
648 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
649 Patch provided by Brad "anomie" Jorsch.
651 NM/23 Bugzilla 687: Fix misparses in eximstats.
652 Patch provided by Heiko Schlittermann.
654 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
655 Patch provided by Heiko Schlittermann.
657 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
658 plus update to original patch.
660 NM/26 Bugzilla 799: Documentation correction for ratelimit.
662 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
663 Patch provided by David Brownlee.
665 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
667 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
669 NM/30 Bugzilla 888: TLS documentation bugfixes.
671 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
673 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
674 Unlike the original bugzilla I have changed all shell scripts in src tree.
676 NM/33 Bugzilla 898: Transport filter timeout fix.
677 Patch by Todd Rinaldo.
679 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
680 Patch by Serge Demonchaux.
682 NM/35 Bugzilla 39: Base64 decode bug fixes.
683 Patch by Jakob Hirsch.
685 NM/36 Bugzilla 909: Correct connect() call in dcc code.
687 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
689 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
691 NM/39 Bugzilla 911: Fixed MakeLinks build script.
697 TK/01 Add preliminary DKIM support. Currently requires a forked version of
698 ALT-N's libdkim that I have put here:
699 http://duncanthrax.net/exim-experimental/
701 Note to Michael Haardt: I had to rename some vars in sieve.c. They
702 were called 'true' and it seems that C99 defines that as a reserved
703 keyword to be used with 'bool' variable types. That means you could
704 not include C99-style headers which use bools without triggering
705 build errors in sieve.c.
707 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
708 as mailq or other aliases. Changed the --help handling significantly
709 to do whats expected. exim_usage() emits usage/help information.
711 SC/01 Added the -bylocaldomain option to eximstats.
713 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
715 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
717 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
723 PH/01 Another patch from the Sieve maintainer.
725 PH/02 When an IPv6 address is converted to a string for single-key lookup
726 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
727 dots are used instead of colons so that keys in lsearch files need not
728 contain colons. This was done some time before quoting was made available
729 in lsearch files. However, iplsearch files do require colons in IPv6 keys
730 (notated using the quote facility) so as to distinguish them from IPv4
731 keys. This meant that lookups for IP addresses in host lists did not work
732 for iplsearch lookups.
734 This has been fixed by arranging for IPv6 addresses to be expressed with
735 colons if the lookup type is iplsearch. This is not incompatible, because
736 previously such lookups could never work.
738 The situation is now rather anomolous, since one *can* have colons in
739 ordinary lsearch keys. However, making the change in all cases is
740 incompatible and would probably break a number of configurations.
742 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
745 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
746 conversion specification without a maximum field width, thereby enabling
747 a rogue spamd server to cause a buffer overflow. While nobody in their
748 right mind would setup Exim to query an untrusted spamd server, an
749 attacker that gains access to a server running spamd could potentially
750 exploit this vulnerability to run arbitrary code as the Exim user.
752 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
753 $primary_hostname instead of what libspf2 thinks the hosts name is.
755 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
756 a directory entry by the name of the lookup key. Previously, if a
757 symlink pointed to a non-existing file or a file in a directory that
758 Exim lacked permissions to read, a lookup for a key matching that
759 symlink would fail. Now it is enough that a matching directory entry
760 exists, symlink or not. (Bugzilla 503.)
762 PH/03 The body_linecount and body_zerocount variables are now exported in the
765 PH/04 Added the $dnslist_matched variable.
767 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
768 This means they are set thereafter only if the connection becomes
771 PH/06 Added the client_condition to authenticators so that some can be skipped
772 by clients under certain conditions.
774 PH/07 The error message for a badly-placed control=no_multiline_responses left
775 "_responses" off the end of the name.
777 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
779 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
780 (without spaces) instead of just copying the configuration text.
782 PH/10 Added the /noupdate option to the ratelimit ACL condition.
784 PH/11 Added $max_received_linelength.
786 PH/12 Added +ignore_defer and +include_defer to host lists.
788 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
789 way in which PCRE > 7.0 is built.
791 PH/14 Implemented queue_only_load_latch.
793 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
794 MAIL command. The effect was to mangle the value on 64-bit systems.
796 PH/16 Another patch from the Sieve maintainer.
798 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
800 PH/18 If a system quota error occurred while trying to create the file for
801 a maildir delivery, the message "Mailbox is full" was not appended to the
802 bounce if the delivery eventually timed out. Change 4.67/27 below applied
803 only to a quota excession during the actual writing of the file.
805 PH/19 It seems that peer DN values may contain newlines (and other non-printing
806 characters?) which causes problems in log lines. The DN values are now
807 passed through string_printing() before being added to log lines.
809 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
810 and InterBase are left for another time.)
812 PH/21 Added message_body_newlines option.
814 PH/22 Guard against possible overflow in moan_check_errorcopy().
816 PH/23 POSIX allows open() to be a macro; guard against that.
818 PH/24 If the recipient of an error message contained an @ in the local part
819 (suitably quoted, of course), incorrect values were put in $domain and
820 $local_part during the evaluation of errors_copy.
826 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
827 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
830 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
831 issue a MAIL command.
833 PH/02 In an ACL statement such as
835 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
837 if a client was not listed at all, or was listed with a value other than
838 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
839 the condition was not true (as it should be), so access was not denied.
840 The bug was that the ! inversion was incorrectly passed on to the second
841 item. This has been fixed.
843 PH/03 Added additional dnslists conditions == and =& which are different from
844 = and & when the dns lookup returns more than one IP address.
846 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
847 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
849 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
850 FSYNC, which compiles an option called disable_fsync that allows for
851 bypassing fsync(). The documentation is heavily laced with warnings.
853 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
855 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
856 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
857 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
858 including adding "make clean"; (3) Added -fPIC when compiling the test
859 dynamically loaded module, to get rid of a warning.
861 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
862 message fails, move_frozen_messages = true and ignore_bounce_errors_after
863 = 0s. The bug is otherwise harmless.
865 PH/07 There was a bug in the dovecot authenticator such that the value of
866 $auth1 could be overwritten, and so not correctly preserved, after a
867 successful authentication. This usually meant that the value preserved by
868 the server_setid option was incorrect.
870 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
872 PH/09 Installed PCRE release 7.0.
874 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
875 run for batched SMTP input. It is now run at the start of every message
876 in the batch. While fixing this I discovered that the process information
877 (output by running exiwhat) was not always getting set for -bs and -bS
878 input. This is fixed, and it now also says "batched" for BSMTP.
880 PH/11 Added control=no_pipelining.
882 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
883 patch, slightly modified), and move the expansion of helo_data till after
884 the connection is made in the smtp transport (so it can use these
887 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
889 PH/14 Added log_selector = +pid.
891 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
893 PH/16 Add ${if forany and ${if forall.
895 PH/17 Added dsn_from option to vary the From: line in DSNs.
897 PH/18 Flush SMTP output before performing a callout, unless control =
898 no_callout_flush is set.
900 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
901 was true (the default) a successful delivery failed to delete the retry
902 item, thus causing premature timeout of the address. The bug is now
905 PH/20 Added hosts_avoid_pipelining to the smtp transport.
907 PH/21 Long custom messages for fakedefer and fakereject are now split up
908 into multiline reponses in the same way that messages for "deny" and
909 other ACL rejections are.
911 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
912 with slight modification.
914 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
915 draft, changing the syntax and factoring some duplicate code".
917 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
918 for deliveries of the second and subsequent messages over the same SMTP
921 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
922 ${reduce, with only minor "tidies".
924 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
926 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
927 expansion side effects.
929 PH/27 When a message times out after an over-quota error from an Exim-imposed
930 quota, the bounce message says "mailbox is full". This message was not
931 being given when it was a system quota that was exceeded. It now should
934 MH/03 Made $recipients available in local_scan(). local_scan() already has
935 better access to the recipient list through recipients_list[], but
936 $recipients can be useful in postmaster-provided expansion strings.
938 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
939 in the case of a MAIL command with additional options following the
940 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
941 were accidentally chopped off.
943 PH/29 SMTP synchronization checks are implemented when a command is read -
944 there is a check that no more input is waiting when there shouldn't be
945 any. However, for some commands, a delay in an ACL can mean that it is
946 some time before the response is written. In this time, more input might
947 arrive, invalidly. So now there are extra checks after an ACL has run for
948 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
949 pipelining has not been advertised.
951 PH/30 MH's patch to allow iscntrl() characters to be list separators.
953 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
954 returned in the SMTP response when smtp_return_error_details was false.
957 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
958 instead of the C I/O that was originally supplied, because problems were
961 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
962 Exim which did not show up earlier: it was assuming that a call to
963 SSL_CTX_set_info_callback() might give an error value. In fact, there is
964 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
965 was a macro that became an assignment, so it seemed to work. This has
966 changed to a proper function call with a void return, hence the compile
967 error. Exim's code has been fixed.
969 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
972 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
974 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
976 PH/37 If a message is not accepted after it has had an id assigned (e.g.
977 because it turns out to be too big or there is a timeout) there is no
978 "Completed" line in the log. When some messages of this type were
979 selected by exigrep, they were listed as "not completed". Others were
980 picked up by some special patterns. I have improved the selection
981 criteria to be more general.
983 PH/38 The host_find_failed option in the manualroute router can now be set
984 to "ignore", to completely ignore a host whose IP address cannot be
985 found. If all hosts are ignored, the behaviour is controlled by the new
986 host_all_ignored option.
988 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
989 homing or because of multiple MX records with /mx) generated more than
990 one IP address, and the following item turned out to be the local host,
991 all the secondary addresses of the first item were incorrectly removed
992 from the list, along with the local host and any following hosts (which
993 is what is supposed to happen).
995 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
996 whoever called Exim into the -H file. In the case of the daemon it was
997 behaving confusingly. When first started, it used values for whoever
998 started the daemon, but after a SIGHUP it used the Exim user (because it
999 calls itself on a restart). I have changed the code so that it now always
1002 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1003 message are rejected with the same error (e.g. no authentication or bad
1004 sender address), and a DATA command is nevertheless sent (as can happen
1005 with PIPELINING or a stupid MUA), the error message that was given to the
1006 RCPT commands is included in the rejection of the DATA command. This is
1007 intended to be helpful for MUAs that show only the final error to their
1010 PH/42 Another patch from the Sieve maintainer.
1012 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1013 Eximstats - Fixed some broken HTML links and added missing column headers
1015 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1016 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1018 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1020 PH/43 Yet another patch from the Sieve maintainer.
1022 PH/44 I found a way to check for a TCP/IP connection going away before sending
1023 the response to the final '.' that terminates a message, but only in the
1024 case where the client has not sent further data following the '.'
1025 (unfortunately, this is allowed). However, in many cases there won't be
1026 any further data because there won't be any more messages to send. A call
1027 to select() can be used: if it shows that the input is "ready", there is
1028 either input waiting, or the socket has been closed. An attempt to read
1029 the next input character can distinguish the two cases. Previously, Exim
1030 would have sent an OK response which the client would never have see.
1031 This could lead to message repetition. This fix should cure that, at
1032 least in a lot of common cases.
1034 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1035 advertised in response to EHLO.
1041 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1042 fixed by 4.65/MH/01 (is this a record?) are fixed:
1044 (i) An empty string was always treated as zero by the numeric comparison
1045 operators. This behaviour has been restored.
1047 (ii) It is documented that the numeric comparison operators always treat
1048 their arguments as decimal numbers. This was broken in that numbers
1049 starting with 0 were being interpreted as octal.
1051 While fixing these problems I realized that there was another issue that
1052 hadn't been noticed. Values of message_size_limit (both the global option
1053 and the transport option) were treated as octal if they started with 0.
1054 The documentation was vague. These values are now always treated as
1055 decimal, and I will make that clear in the documentation.
1061 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1062 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1065 MH/01 Don't check that the operands of numeric comparison operators are
1066 integers when their expansion is in "skipping" mode (fixes bug
1067 introduced by 4.64-PH/07).
1069 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1070 child addresses, Exim now panics and dies. Previously, because the count
1071 is held in a short int, deliveries were likely to be lost. As such a
1072 large number of recipients for a single message is ridiculous
1073 (performance will be very, very poor), I have chosen to impose a limit
1074 rather than extend the field.
1080 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1081 leftover -K file (the existence of which was triggered by #402).
1082 While we were at it, introduced process PID as part of the -K
1083 filename. This should rule out race conditions when creating
1086 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1087 processing considerably. Previous code took too long for large mails,
1088 triggering a timeout which in turn triggers #401.
1090 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1091 in the DK code in transports.c. sendfile() is not really portable,
1092 hence the _LINUX specificness.
1094 TF/01 In the add_headers option to the mail command in an Exim filter,
1095 there was a bug that Exim would claim a syntax error in any
1096 header after the first one which had an odd number of characters
1099 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1100 callout verification, Exim cached a "reject" for the entire domain. This
1101 is correct for most verifications, but it is not correct for a recipient
1102 verification with use_sender or use_postmaster set, because in that case
1103 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1104 case of MAIL FROM:<> rejection from other early rejections (e.g.
1105 rejection of HELO). When verifying a recipient using a non-null MAIL
1106 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1107 Whatever the result of the callout, the value of the domain cache is
1108 left unchanged (for any other kind of callout, getting as far as trying
1109 RCPT means that the domain itself is ok).
1111 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1114 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1115 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1116 session, the daemon ignores ECONNECT errors and logs others; it now
1117 ignores EPIPE as well.
1119 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1120 (quoted-printable decoding).
1122 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1123 later the small subsequent patch to fix an introduced bug.
1125 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1127 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1129 PH/08 An error is now given if message_size_limit is specified negative.
1131 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1132 to be given (somewhat) arbitrary names.
1134 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1137 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1138 miscellaneous code fixes
1140 PH/10 Added the log_reject_target ACL modifier to specify where to log
1143 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1144 hostname. This is wrong, because it relates to the incoming message (and
1145 probably the interface on which it is arriving) and not to the outgoing
1146 callout (which could be using a different interface). This has been
1147 changed to use the value of the helo_data option from the smtp transport
1148 instead - this is what is used when a message is actually being sent. If
1149 there is no remote transport (possible with a router that sets up host
1150 addresses), $smtp_active_hostname is used.
1152 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1153 tweaks were necessary in order to get it to work (see also 21 below):
1154 (a) The code assumed that strncpy() returns a negative number on buffer
1155 overflow, which isn't the case. Replaced with Exim's string_format()
1157 (b) There were several signed/unsigned issues. I just did the minimum
1158 hacking in of casts. There is scope for a larger refactoring.
1159 (c) The code used strcasecmp() which is not a standard C function.
1160 Replaced with Exim's strcmpic() function.
1161 (d) The code set only $1; it now sets $auth1 as well.
1162 (e) A simple test gave the error "authentication client didn't specify
1163 service in request". It would seem that Dovecot has changed its
1164 interface. Fortunately there's a specification; I followed it and
1165 changed what the client sends and it appears to be working now.
1167 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1170 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1171 address A is aliased to B and C, where B exists and C does not. Without
1172 -v the output is "A verified" because verification stops after a
1173 successful redirection if more than one address is generated. However,
1174 with -v the child addresses are also verified. Exim was outputting "A
1175 failed to verify" and then showing the successful verification for C,
1176 with its parentage. It now outputs "B failed to verify", showing B's
1177 parentage before showing the successful verification of C.
1179 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1180 look up a TXT record in a specific list after matching in a combined
1183 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1184 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1185 they consult the DNS. I had assumed they would set it the way they
1186 wanted; and indeed my experiments on Linux seem to show that in some
1187 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1188 To be on the safe side, however, I have now made the interface to
1189 host_find_byname() similar to host_find_bydns(), with an argument
1190 containing the DNS resolver options. The host_find_byname() function now
1191 sets these options at its start, just as host_find_bydns() does. The smtp
1192 transport options dns_qualify_single and dns_search_parents are passed to
1193 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1194 of host_find_byname() use the default settings of RES_DEFNAMES
1195 (qualify_single) but not RES_DNSRCH (search_parents).
1197 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1198 spool_read_header() do less string testing, by means of a preliminary
1199 switch on the second character of optional "-foo" lines. (This is
1200 overdue, caused by the large number of possibilities that now exist.
1201 Originally there were few.) While I was there, I also converted the
1202 str(n)cmp tests so they don't re-test the leading "-" and the first
1203 character, in the hope this might squeeze out yet more improvement.
1205 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1206 flag allowing group syntax was set by the header_syntax check but not
1207 turned off, possible causing trouble later; (2) The flag was not being
1208 set at all for the header_verify test, causing "group"-style headers to
1209 be rejected. I have now set it in this case, and also caused header_
1210 verify to ignore an empty address taken from a group. While doing this, I
1211 came across some other cases where the code for allowing group syntax
1212 while scanning a header line wasn't quite right (mostly, not resetting
1213 the flag correctly in the right place). These bugs could have caused
1214 trouble for malformed header lines. I hope it is now all correct.
1216 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1217 with the "reply" argument non-NULL. The code, however (which originally
1218 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1219 but it didn't always do it. This confused somebody who was copying the
1220 code for some other use. I have removed all the tests.
1222 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1223 feature that was used to support insecure browsers during the U.S. crypto
1224 embargo. It requires special client support, and Exim is probably the
1225 only MTA that supported it -- and would never use it because real RSA is
1226 always available. This code has been removed, because it had the bad
1227 effect of slowing Exim down by computing (never used) parameters for the
1228 RSA_EXPORT functionality.
1230 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1231 authenticator to fail if there's a tab character in the incoming data
1232 (there should never be unless someone is messing about, as it's supposed
1233 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1234 if the connection is using TLS or if the remote IP is the same as the
1235 local IP, and the "valid-client-cert option" if a client certificate has
1238 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1239 authenticators. This can be used for authorization after authentication
1240 succeeds. (In the case of plaintext, it servers for both authentication
1243 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1244 if any retry times were supplied.
1246 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1247 connection, where there is no client IP address to check. In this
1248 situation, the verify now always succeeds.
1250 PH/25 Applied John Jetmore's -Mset patch.
1252 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1254 PH/27 In a string expansion for a processed (not raw) header when multiple
1255 headers of the same name were present, leading whitespace was being
1256 removed from all of them, but trailing whitespace was being removed only
1257 from the last one. Now trailing whitespace is removed from each header
1258 before concatenation. Completely empty headers in a concatenation (as
1259 before) are ignored.
1261 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1262 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1264 PH/29 [Removed. This was a change that I later backed out, and forgot to
1265 correct the ChangeLog entry (that I had efficiently created) before
1266 committing the later change.]
1268 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1269 address errors (4xx response to RCPT) over the same connection as other
1270 messages routed to the same hosts. Such deliveries are always "forced",
1271 so retry times are not inspected. This resulted in far too many retries
1272 for the affected addresses. The effect occurred only when there were more
1273 hosts than the hosts_max_try setting in the smtp transport when it had
1274 the 4xx errors. Those hosts that it had tried were not added to the list
1275 of hosts for which the message was waiting, so if all were tried, there
1276 was no problem. Two fixes have been applied:
1278 (i) If there are any address or message errors in an SMTP delivery, none
1279 of the hosts (tried or untried) are now added to the list of hosts
1280 for which the message is waiting, so the message should not be a
1281 candidate for sending over the same connection that was used for a
1282 successful delivery of some other message. This seems entirely
1283 reasonable: after all the message is NOT "waiting for some host".
1284 This is so "obvious" that I'm not sure why it wasn't done
1285 previously. Hope I haven't missed anything, but it can't do any
1286 harm, as the worst effect is to miss an optimization.
1288 (ii) If, despite (i), such a delivery is accidentally attempted, the
1289 routing retry time is respected, so at least it doesn't keep
1290 hammering the server.
1292 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1293 in ${readsocket because some servers need this prod.
1295 PH/32 Added some extra debug output when updating a wait-xxx database.
1297 PH/33 The hint "could be header name not terminated by colon", which has been
1298 given for certain expansion errors for a long time, was not being given
1299 for the ${if def:h_colon_omitted{... case.
1301 PH/34 The spec says: "With one important exception, whenever a domain list is
1302 being scanned, $domain contains the subject domain." There was at least
1303 one case where this was not true.
1305 PH/35 The error "getsockname() failed: connection reset by peer" was being
1306 written to the panic log as well as the main log, but it isn't really
1307 panic-worthy as it just means the connection died rather early on. I have
1308 removed the panic log writing for the ECONNRESET error when getsockname()
1311 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1312 runs only) independently of the message's sender address. This meant
1313 that, if the 4xx error was in fact related to the sender, a different
1314 message to the same recipient with a different sender could confuse
1315 things. In particualar, this can happen when sending to a greylisting
1316 server, but other circumstances could also provoke similar problems.
1317 I have changed the default so that the retry time for these errors is now
1318 based a combination of the sender and recipient addresses. This change
1319 can be overridden by setting address_retry_include_sender=false in the
1322 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1323 remote server are returned as part of bounce messages. This was not
1324 happening for LMTP over a pipe (the lmtp transport), but now it is the
1325 same for both kinds of LMTP.
1327 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1328 in header lines that were in fact CNAMEs. This is no longer the case.
1330 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1331 and queue runs started by the daemon processed all messages. This has
1332 been fixed so that -R and -S can now usefully be given with -q<time>.
1334 PH/40 Import PCRE release 6.7 (fixes some bugs).
1336 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1338 PH/42 Give an error if -q is specified more than once.
1340 PH/43 Renamed the variables $interface_address and $interface_port as
1341 $received_ip_address and $received_port, to make it clear that these
1342 values apply to message reception, and not to the outgoing interface when
1343 a message is delivered. (The old names remain recognized, of course.)
1345 PH/44 There was no timeout on the connect() call when using a Unix domain
1346 socket in the ${readsocket expansion. There now is.
1348 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1349 be meaningful with "accept".
1351 SC/01 Eximstats V1.43
1352 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1354 SC/02 Eximstats V1.44
1355 Use a glob alias rather than an array ref in the generated
1356 parser. This improves both readability and performance.
1358 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1359 Collect SpamAssassin and rejection statistics.
1360 Don't display local sender or destination tables unless
1361 there is data to show.
1362 Added average volumes into the top table text output.
1364 SC/04 Eximstats V1.46
1365 Collect data on the number of addresses (recipients)
1366 as well as the number of messages.
1368 SC/05 Eximstats V1.47
1369 Added 'Message too big' to the list of mail rejection
1370 reasons (thanks to Marco Gaiarin).
1372 SC/06 Eximstats V1.48
1373 Mainlog lines which have GMT offsets and are too short to
1374 have a flag are now skipped.
1376 SC/07 Eximstats V1.49 (Alain Williams)
1377 Added the -emptyok flag.
1379 SC/08 Eximstats V1.50
1380 Fixes for obtaining the IP address from reject messages.
1382 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1383 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1384 whitesspace changes from 4.64-PH/27
1386 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1389 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1390 are found, allow negative numbers in numeric criteria)
1392 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1394 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1395 to match changes made in 4.64-PH/43
1397 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1399 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1400 "domain" is actually an IP address, and force a failure. This locks out
1401 those revolvers/nameservers that support "A-for-A" lookups, in
1402 contravention of the specifications.
1404 PH/48 When a host name was looked up from an IP address, and the subsequent
1405 forward lookup of the name timed out, the host name was left in
1406 $sender_host_name, contrary to the specification.
1408 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1409 restricted to single-key lookups, Exim was not diagnosing an error if
1410 * or *@ was used with a query-style lookup.
1412 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1414 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1415 long ago, but noone interested enough thought of it. Let's just say that
1416 the "1.1" means that there are some new functions that weren't there at
1417 some point in the past.
1419 PH/51 Error processing for expansion failure of helo_data from an smtp
1420 transport during callout processing was broken.
1422 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1423 tested/used via the -bh/-bhc/-bs options.
1425 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1426 bug, fixed in subsequent PCRE releases).
1428 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1429 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1431 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1437 SC/01 Use a glob alias rather than an array ref in eximstats generated
1438 parser. This improves both readability and performance.
1440 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1441 Don't display local sender or destination tables in eximstats unless
1442 there is data to show.
1443 Added average volumes into the eximstats top table text output.
1445 SC/03 Collect data on the number of addresses (recipients) as well
1446 as the number of messages in eximstats.
1448 TF/01 Correct an error in the documentation for the redirect router. Exim
1449 does (usually) call initgroups() when daemonizing.
1451 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1452 with consistent privilege compared to when running as a daemon.
1454 TF/03 Note in the spec that $authenticated_id is not set for local
1455 submissions from trusted users.
1457 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1458 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1460 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1461 by adding some example configuration directives to the default
1462 configuration file. A little bit of work is required to uncomment the
1463 directives and define how usernames and passwords are checked, but
1464 there is now a framework to start from.
1466 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1467 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1468 without this. I don't know how relevant this is to other LDAP libraries.
1470 PH/02 Add the verb name to the "unknown ACL verb" error.
1472 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1474 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1476 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1477 directory not expanded when it should be if an expanded home directory
1478 was set for the address (which is overridden by the transport).
1480 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1483 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1484 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1485 because it is too late at that time, and has no effect.
1487 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1488 security issue with \' (bugzilla #107). I could not use the
1489 PQescapeStringConn() function, because it needs a PGconn value as one of
1492 PH/08 When testing addresses using -bt, indicate those final addresses that
1493 are duplicates that would not cause an additional delivery. At least one
1494 person was confused, thinking that -bt output corresponded to deliveries.
1495 (Suppressing duplicates isn't a good idea as you lose the information
1496 about possibly different redirections that led to the duplicates.)
1498 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1499 systems where poll() doesn't work, in particular OS X.
1501 PH/10 Added more information to debugging output for retry time not reached.
1503 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1504 operations in malware.c.
1506 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1509 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1510 syslog_duplication set false, log lines that would normally be written
1511 both the the main log and to the reject log were not written to syslog at
1514 PH/14 In the default configuration, change the use of "message" in ACL warn
1515 statements to "add_header".
1517 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1518 not followed by a command (e.g. "seen endif").
1520 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1521 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1524 PH/17 Added extra conditions to the default value of delay_warning_condition
1528 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1529 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1530 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1533 The Auto-Submitted: and various List- headers are standardised, whereas I
1534 don't think Precedence: ever was.
1536 PH/18 Refactored debugging code in route_finduser() to show more information,
1537 in particular, the error code if getpwnam() issues one.
1539 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1540 This is apparently needed in addition to the PH/07 change above to avoid
1541 any possible encoding problems.
1543 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1544 but not after initializing Perl.
1546 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1547 output them only if debugging. By default they are written stderr,
1548 apparently, which is not desirable.
1550 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1553 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1556 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1558 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1559 authenticated or an ident call has been made. Suppress the default
1560 values for $authenticated_id and $authenticated_sender (but permit -oMai
1561 and -oMas) when testing with -bh.
1563 PH/24 Re-jigged the order of the tests in the default configuration so that the
1564 tests for valid domains and recipients precede the DNS black list and CSA
1565 tests, on the grounds that those ones are more expensive.
1567 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1568 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1569 This bug exists in every version of Exim that I still have, right back to
1572 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1573 However, an attempt to turn on case-sensitivity in a regex key by
1574 including (?-i) didn't work because the subject string was already
1575 lowercased, and the effects were non-intuitive. It turns out that a
1576 one-line patch can be used to allow (?-i) to work as expected.
1582 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1583 other effects) broke the use of negated acl sub-conditions.
1585 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1588 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1589 "Deny" causes Exim to reject the incoming connection with a 554 error.
1590 Unfortunately, if there is a major crisis, such as a disk failure,
1591 tcp-wrappers gives "deny", whereas what one would like would be some
1592 kind of temporary error. A kludge has been added to help with this.
1593 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1594 554 error is used if errno is still zero or contains ENOENT (which occurs
1595 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1598 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1600 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1601 errors. Otherwise a message that provokes a temporary error (when other
1602 messages do not) can cause a whole host to time out.
1604 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1605 addresses were routed directly to files or pipes from a redirect router.
1606 File deliveries just didn't batch; pipe deliveries might have suffered
1609 PH/06 A failure to get a lock for a hints database would erroneously always say
1610 "Failed to get write lock", even when it was really a read lock.
1612 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1613 of 0600. This has been changed to use the value of the lockfile_mode
1614 option (which defaults to 0600).
1616 PH/08 Applied small patch from the Sieve maintainer.
1618 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1619 folder from quota calculations, a direct delivery into this folder messed
1620 up the contents of the maildirsize file. This was because the regex was
1621 used only to exclude .Trash (or whatever) when the size of the mailbox
1622 was calculated. There was no check that a delivery was happening into an
1623 excluded directory. This bug has been fixed by ignoring all quota
1624 processing for deliveries into excluded directories.
1626 PH/10 Added the maildirfolder_create_regex option to appendfile.
1632 PH/01 The code for finding all the local interface addresses on a FreeBSD
1633 system running IPv6 was broken. This may well have applied to all BSD
1634 systems, as well as to others that have similar system calls. The broken
1635 code found IPv4 interfaces correctly, but gave incorrect values for the
1636 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1637 that it would not match correctly against @[] and not recognize the IPv6
1640 PH/02 The ipliteral router was not recognizing addresses of the form user@
1641 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1643 PH/03 Added disable_ipv6.
1645 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1646 decoded form, because it is most often used to construct To: headers
1647 lines in autoreplies, and the decoded form may well be syntactically
1648 invalid. However, $reply_address has leading white space removed, and all
1649 newlines turned into spaces so that the autoreply transport does not
1652 PH/05 If group was specified without a user on a router, and no group or user
1653 was specified on a transport, the group from the router was ignored.
1655 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1656 for visible compile-time settings that can be used to change these
1657 numbers, for those that want even more. Backwards compatibility with old
1658 spool files has been maintained. However, going back to a previous Exim
1659 release will lost any variables that are in spool files.
1661 PH/07 Two small changes when running in the test harness: increase delay when
1662 passing a TCP/IP connection to a new process, in case the original
1663 process has to generate a bounce, and remove special handling of
1664 127.0.0.2 (sic), which is no longer necessary.
1666 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1667 be the same on different OS.
1669 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1672 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1673 whether --show-vars was specified or not
1675 JJ/02 exipick: Added support for new ACL variable spool format introduced
1678 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1679 syntactically invalid From: or Reply-to: line, and a filter used this to
1680 generate an autoreply, and therefore failed to obtain an address for the
1681 autoreply, Exim could try to deliver to a non-existent relative file
1682 name, causing unrelated and misleading errors. What now happens is that
1683 it logs this as a hard delivery error, but does not attempt to create a
1686 PH/11 The exinext utility has a -C option for testing purposes, but although
1687 the given file was scanned by exinext itself; it wasn't being passed on
1688 when Exim was called.
1690 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1691 an end-of-file indication when reading a command response.
1693 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1694 compiled. In many other places in Exim, IPv6 addresses are always
1695 recognized, so I have changed this. It also means that IPv4 domain
1696 literals of the form [IPV4:n.n.n.n] are now always recognized.
1698 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1699 used if the router is not running as root, for example, when verifying at
1700 ACL time, or when using -bh. The debugging output from this situation was
1701 non-existent - all you got was a failure to exec. I have made two
1704 (a) Failures to set uid/gid, the current directory, or a process leader
1705 in a subprocess such as that created by queryprogram now generate
1706 suitable debugging ouput when -d is set.
1708 (b) The queryprogram router detects when it is not running as root,
1709 outputs suitable debugging information if -d is set, and then runs
1710 the subprocess without attempting to change uid/gid.
1712 PH/15 Minor change to Makefile for building test_host (undocumented testing
1715 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1716 additional section of a DNS packet that returns MX or SRV records.
1717 Instead, it always explicitly searches for A/AAAA records. This avoids
1718 major problems that occur when a DNS server includes only records of one
1719 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1720 fixed another bug: if SRV records were looked up and the corresponding
1721 address records were *not* found in the additional section, the port
1722 values from the SRV records were lost.
1724 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1725 using the correct key (the original address) when searching the retry
1726 rules in order to find which one to use for generating the retry hint.
1728 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1729 adding the default one. Similarly, if it contains a Reply-To: header, the
1730 errors_reply_to option, if set, is not used.
1732 PH/19 When calculating a retry time, Exim used to measure the "time since
1733 failure" by looking at the "first failed" field in the retry record. Now
1734 it does not use this if it is later than than the arrival time of the
1735 message. Instead it uses the arrival time. This makes for better
1736 behaviour in cases where some deliveries succeed, thus re-setting the
1737 "first failed" field. An example is a quota failure for a huge message
1738 when small messages continue to be delivered. Without this change, the
1739 "time since failure" will always be short, possible causing more frequent
1740 delivery attempts for the huge message than are intended.
1741 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1743 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1744 $1, $2, $3) because the numerical variables can be reset during some
1745 expansion items (e.g. "match"), thereby losing the authentication data.
1747 PH/21 Make -bV show the size of off_t variables so that the test suite can
1748 decide whether to run tests for quotas > 2G.
1750 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1751 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1752 filecount value is greater than 2G or if a quota value is greater than 2G
1753 on a system where the size of off_t is not greater than 4, a panic error
1756 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1757 never match. The debug and -bh output now contains an explicit error
1758 message indicating a malformed IPv4 address or mask.
1760 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1761 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1762 PH/23 above applies.
1764 PH/25 Do not write to syslog when running in the test harness. The only
1765 occasion when this arises is a failure to open the main or panic logs
1766 (for which there is an explicit test).
1768 PH/26 Added the /no_tell option to "control=freeze".
1770 PH/27 If a host name lookup failed very early in a connection, for example, if
1771 the IP address matched host_lookup and the reverse lookup yielded a name
1772 that did not have a forward lookup, an error message of the form "no IP
1773 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1774 could be logged. Now it outputs the IP address instead of "NULL".
1776 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1777 allows the sender and the authenticated sender to be set when
1778 submitting a message from within Exim. Since child_open_exim() is
1779 documented for local_scan(), the new function should be too.
1781 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1782 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1783 results in an empty string is now treated as unset.
1785 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1787 PH/31 Added sender_verify_fail logging option.
1789 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1790 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1791 tidied the source and removed it altogether.
1793 PH/33 When a queue run was abandoned because the load average was too high, a
1794 log line was always written; now it is written only if the queue_run log
1795 selector is set. In addition, the log line for abandonment now contains
1796 information about the queue run such as the pid. This is always present
1797 in "start" and "stop" lines but was omitted from the "abandon" line.
1799 PH/34 Omit spaces between a header name and the colon in the error message that
1800 is given when verify = headers_syntax fails (if there are lots of them,
1801 the message gets confusing).
1803 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1804 names, as there are now some PTR records that contain slashes. This check
1805 is only to protect against broken name servers that fall over on strange
1806 characters, so the fact that it applies to all lookups doesn't matter.
1808 PH/36 Now that the new test suite is complete, we can remove some of the
1809 special code in Exim that was needed for the old test suite. For example,
1810 sorting DNS records because real resolvers return them in an arbitrary
1811 order. The new test suite's fake resolver always returns records in the
1814 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1815 bounces) except when queue_only is set, to avoid logging races between
1816 the different processes.
1818 PH/38 Panic-die if .include specifies a non-absolute path.
1820 PH/39 A tweak to the "H" retry rule from its user.
1822 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1823 a label. They prevented compilation on older perls.
1825 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1826 a warning to be raised on newish perls.
1828 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1829 on queue. Changes to match documented behaviour of showing count of
1830 messages matching specified criteria.
1832 PH/40 Changed the default ident timeout from 30s to 5s.
1834 PH/41 Added support for the use of login_cap features, on those BSD systems
1835 that have them, for controlling the resources used by pipe deliveries.
1837 PH/42 The content-scanning code uses fopen() to create files in which to put
1838 message data. Previously it was not paying any attention to the mode of
1839 the files. Exim runs with umask(0) because the rest of the code creates
1840 files with open(), and sets the required mode explicitly. Thus, these
1841 files were ending up world-writeable. This was not a big issue, because,
1842 being within the spool directory, they were not world-accessible. I have
1843 created a function called modefopen, which takes an additional mode
1844 argument. It sets umask(777), creates the file, chmods it to the required
1845 mode, then resets the umask. All the relevant calls to fopen() in the
1846 content scanning code have been changed to use this function.
1848 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1849 to 24 hours. This avoids potential overflow problems when processing G
1850 and H retry rules. I suspect nobody ever tinkers with this value.
1852 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1854 PH/45 When the plaintext authenticator is running as a client, the server's
1855 challenges are checked to ensure they are valid base64 strings. By
1856 default, the authentication attempt is cancelled if an invalid string is
1857 received. Setting client_ignore_invalid_base64 true ignores these errors.
1858 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1859 they are received. Thus, the responses can be made to depend on the
1860 challenges. If an invalid string is ignored, an empty string is placed in
1863 PH/46 Messages that are created by the autoreply transport now contains a
1864 References: header, in accordance with RFCs 2822 and 3834.
1866 PH/47 Added authenticated_sender_force to the smtp transport.
1868 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1870 PH/49 Installed latest patch from the Sieve maintainer.
1872 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1873 was also set, the appendfile transport was unnecessarily scanning a
1874 directory of message files (e.g. for maildir delivery) to find the count
1875 of files (along with the size), even though it did not need this
1876 information. It now does the scan only if it needs to find either the
1877 size of the count of files.
1879 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1881 PH/52 Two bugs concerned with error handling when the smtp transport is
1884 (i) Exim was not creating retry information for temporary errors given
1885 for individual recipients after the DATA command when the smtp transport
1886 was used in LMTP mode. This meant that they could be retried too
1887 frequently, and not timed out correctly.
1889 (ii) Exim was setting the flag that allows error details to be returned
1890 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1891 recipients that were returned after the DATA command.
1893 PH/53 This is related to PH/52, but is more general: for any failing address,
1894 when detailed error information was permitted to be returned to the
1895 sender, but the error was temporary, then after the final timeout, only
1896 "retry timeout exceeded" was returned. Now it returns the full error as
1897 well as "retry timeout exceeded".
1899 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1900 do this, and (what is worse) MTAs that accept it.
1902 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1903 will now be deprecated.
1905 PH/56 New os.c-cygwin from the Cygwin maintainer.
1907 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1908 formats (previously only available in exim formats via -bpr, -bpru,
1909 and -bpra. Now also available in native and exiqgrep formats)
1911 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1912 with very large, slow to parse queues
1914 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1916 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1918 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1919 responses to authentication challenges, though it was showing the
1920 challenges; (ii) I've removed the CR characters from the debug output for
1923 PH/58 Allow for the insertion of a newline as well as a space when a string
1924 is turned into more than one encoded-word during RFC 2047 encoding. The
1925 Sieve code now uses this.
1927 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1928 data_4xx, lost_connection, tls_required.
1930 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1931 message was being sent as an SMTP response.
1933 PH/61 Add -l and -k options to exicyclog.
1935 PH/62 When verifying, if an address was redirected to one new address, so that
1936 verification continued, and the new address failed or deferred after
1937 having set something in $address_data, the value of $address_data was not
1938 passed back to the ACL. This was different to the case when no
1939 redirection occurred. The value is now passed back in both cases.
1941 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1942 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1943 use login_cap.h, so on its own it isn't the distinguishing feature. The
1944 new name refers directly to the setclassresources() function.
1946 PH/65 Added configuration files for NetBSD3.
1948 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1950 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1951 is preferred over IPv4.
1953 PH/68 The bounce_return_message and bounce_return_body options were not being
1954 honoured for bounces generated during the reception of non-SMTP messages.
1955 In particular, this applied to messages rejected by the ACL. This bug has
1956 been fixed. However, if bounce_return_message is true and bounce_return_
1957 body is false, the headers that are returned for a non-SMTP message
1958 include only those that have been read before the error was detected.
1959 (In the case of an ACL rejection, they have all been read.)
1961 PH/69 The HTML version of the specification is now built in a directory called
1962 spec_html instead of spec.html, because the latter looks like a path with
1963 a MIME-type, and this confuses some software.
1965 PH/70 Catch two compiler warnings in sieve.c.
1967 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1968 function verify_get_ident() calls ip_connect() to connect a socket, but
1969 if the "connect()" function timed out, ip_connect() used to close the
1970 socket. However, verify_get_ident() also closes the socket later, and in
1971 between Exim writes to the log, which may get opened at this point. When
1972 the socket was closed in ip_connect(), the log could get the same file
1973 descriptor number as the socket. This naturally causes chaos. The fix is
1974 not to close the socket in ip_connect(); the socket should be closed by
1975 the function that creates it. There was only one place in the code where
1976 this was missing, in the iplookup router, which I don't think anybody now
1977 uses, but I've fixed it anyway.
1979 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1980 well as to direct DNS lookups. Otherwise the handling of names in host
1981 lists is inconsistent and therefore confusing.
1987 PH/01 Two changes to the default runtime configuration:
1989 (1) Move the checks for relay_from_hosts and authenticated clients from
1990 after to before the (commented out) DNS black list checks.
1992 (2) Add control=submission to the relay_from_hosts and authenticated
1993 clients checks, on the grounds that messages accepted by these
1994 statements are most likely to be submissions.
1996 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1998 (1) Generate an error if the third argument for the ${prvs expansion is
2001 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2004 (3) Reset the variables that are obtained from the first argument of
2005 ${prvscheck and used in the second argument before leaving the code,
2006 because their memory is reclaimed, so using them afterwards may do
2009 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2010 one (it's much easier than Tom thought :-).
2012 (5) Because of (4), we can now allow for the use of $prvscheck_result
2013 inside the third argument.
2015 PH/03 For some reason, the default setting of PATH when running a command from
2016 a pipe transport was just "/usr/bin". I have changed it to
2019 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2020 anything to be listed in the output from -bV.
2022 PH/05 When a filter generated an autoreply, the entire To: header line was
2023 quoted in the delivery log line, like this:
2025 => >A.N.Other <ano@some.domain> <original@ddress> ...
2027 This has been changed so that it extracts the operative address. There
2028 may be more than one such address. If so, they are comma-separated, like
2031 => >ano@some.domain,ona@other.domain <original@ddress> ...
2033 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2034 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2035 not being looked up in the rDNS to get a host name, Exim was showing the
2036 IP address twice in Received: lines, even though the IP addresses were
2037 identical. For example:
2039 Received: from [1.2.3.4] (helo=[1.2.3.4])
2041 However, if the real host name was known, it was omitting the HELO data
2042 if it matched the actual IP address. This has been tidied up so that it
2043 doesn't show the same IP address twice.
2045 PH/07 When both +timestamp and +memory debugging was on, the value given by
2046 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2047 called by the debug printing, thereby overwriting the timestamp buffer.
2048 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2050 PH/08 When the original message was included in an autoreply transport, it
2051 always said "this is a copy of the message, including all the headers",
2052 even if body_only or headers_only was set. It now gives an appropriate
2055 PH/09 Applied a patch from the Sieve maintainer which:
2057 o fixes some comments
2058 o adds the (disabled) notify extension core
2059 o adds some debug output for the result of if/elsif tests
2060 o points to the current vacation draft in the documentation
2061 and documents the missing references header update
2065 o fixes a bug in processing the envelope test (when testing
2066 multiple envelope elements, the last element determinted the
2069 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2070 Electronic Mail") by including:
2072 Auto-submitted: auto-generated
2074 in the messages that it generates (bounce messages and others, such as
2075 warnings). In the case of bounce messages for non-SMTP mesages, there was
2076 also a typo: it was using "Auto_submitted" (underscore instead of
2077 hyphen). Since every message generated by Exim is necessarily in response
2078 to another message, thes have all been changed to:
2080 Auto-Submitted: auto-replied
2082 in accordance with these statements in the RFC:
2084 The auto-replied keyword:
2086 - SHOULD be used on messages sent in direct response to another
2087 message by an automatic process,
2089 - MUST NOT be used on manually-generated messages,
2091 - MAY be used on Delivery Status Notifications (DSNs) and Message
2092 Disposition Notifications (MDNs),
2094 - MUST NOT be used on messages generated by automatic or periodic
2095 processes, except for messages which are automatic responses to
2098 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2099 to the default Received: header definition.
2101 PH/12 Added log selector acl_warn_skipped (default on).
2103 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2104 variables because (a) they are in the wrong storage pool and (b) even if
2105 they were copied, it wouldn't work properly because of the caching.
2107 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2108 checking when decoding. Apparently there are clients that generate
2109 overlong encoded strings. Why am I not surprised?
2111 PH/15 If the first argument of "${if match_address" was not empty, but did not
2112 contain an "@" character, Exim crashed. Now it writes a panic log message
2113 and treats the condition as false.
2115 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2117 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2118 extension "envelope-auth". The code is finished and in agreement with
2119 other implementations, but there is no documentation so far and in fact,
2120 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2121 not changing the active code.
2123 Print executed "if" and "elsif" statements when debugging is used. This
2124 helps a great deal to understand what a filter does.
2126 Document more things not specified clearly in RFC3028. I had all this
2127 sorted out, when out of a sudden new issues came to my mind. Oops."
2129 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2132 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2133 canonical form (as documented). However, after a host name lookup from
2134 the IP address, check_host() was doing a simple string comparison with
2135 addresses acquired from the DNS when checking that the found name did
2136 have the original IP as one of its addresses. Since any found IPv6
2137 addresses are likely to be in abbreviated form, the comparison could
2138 fail. Luckily, there already exists a function for doing the comparison
2139 by converting both addresses to binary, so now that is used instead of
2140 the text comparison.
2142 PH/20 There was another similar case to PH/19, when a complete host name was
2143 given in a host list; looking up its IP address could give an abbreviated
2144 form, whereas the current host's name might or might not be abbreviated.
2145 The same fix has been applied.
2151 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2152 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2155 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2156 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2158 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2160 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2161 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2162 Also, for "Auto-Submitted", treat anything other than "no" as
2163 non-personal, in accordance with RFC 3834. (Previously it treated
2164 anything starting "auto-" as non-personal.)
2166 TF/01 The control=submission/name=... option had a problem with syntax
2167 errors if the name included a slash character. The /name= option
2168 now slurps the rest of the string, so it can include any characters
2169 but it must come last in the list of options (after /sender_retain
2172 PH/05 Some modifications to the interface to the fake nameserver for the new
2180 TK/01 Added the "success_on_redirect" address verification option. See
2181 NewStuff for rationale and an example.
2183 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2185 PH/02 Patch to exigrep to allow it to work on syslog lines.
2187 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2188 fread() to skip over the body file's header line, because in Cygwin the
2189 header line is locked and is inaccessible.
2191 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2192 co-exist for some time) to make it clear that it is the Exim ID that is
2193 referenced, not the Message-ID: header line.
2195 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2196 string_format() function, because snprintf() does not exist on all
2199 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2200 ${stat: expansion item.
2202 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2203 protocol synchronization error", to keep the pedants happy.
2205 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2206 well as for IRIX systems, when gcc is being used. See the host.c source
2209 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2211 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2214 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2215 transport and to the smtp transport in LMTP mode.
2217 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2219 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2220 run a filter in a subprocess. This could lead to confusion in subsequent
2221 lookups in the parent process. There should also be a search_tidyup() at
2222 the end of the subprocess.
2224 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2225 only if the host matched helo_try_verify_hosts, which caused the
2226 verification to occur when the EHLO/HELO command was issued. The ACL just
2227 tested the remembered result. Now, if a previous verification attempt has
2228 not happened, "verify = helo" does it there and then.
2230 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2232 TK/03 Fix log output including CR from clamd.
2234 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2235 exist provoked a memory error which could cause a segfault.
2237 PH/15 Installed PCRE 6.2
2239 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2241 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2242 of the problem. Specifically, suggested +O2 rather than +O1 for the
2245 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2247 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2248 record, the port was not correctly logged when the outgoing_port log
2249 selector was set (it logged the transort's default port).
2251 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2252 fallback_hosts, and "hosts" in the smtp transport.
2254 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2255 host errors such as "Connection refused".
2257 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2258 authentication with radiusclient 0.4.9:
2260 - Error returned from rc_read_config was caught wrongly
2261 - Username/password not passed on to radius server due to wrong length.
2263 The presumption is that some radiusclient API changes for 4.51/PH/17
2264 were not taken care of correctly. The code is still untested by me (my
2265 Linux distribution still has 0.3.2 of radiusclient), but it was
2266 contributed by a Radius user.
2268 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2269 expanding the "port" option of the smtp transport.
2271 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2272 while reading a MIME header. Thanks to Tom Hughes for a patch.
2274 PH/24 Include config.h inside local_scan.h so that configuration settings are
2277 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2278 that in an ACL for RCPT (for example), you can examine exactly what was
2281 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2282 commands, but it was not correctly comparing the address with the actual
2283 client host address. Thus, it would show the EHLO address in Received:
2284 header lines when this was not necessary.
2286 PH/27 Added the % operator to ${eval:}.
2288 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2289 it should be ignoring failures (because with -C, for example, it has lost
2290 privilege). It wasn't ignoring creation failures other than "already
2293 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2296 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2297 because an input line was too long, either on its own, or by virtue of
2298 too many continuations, the temporary file was not being removed, and the
2299 return code was incorrect.
2301 PH/31 Missing "BOOL" in function definition in filtertest.c.
2303 PH/32 Applied Sieve patches from the maintainer.
2305 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2307 PH/33 Added "verify = not_blind".
2309 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2310 Local/Makefile (with some defaults set). These are used in built scripts
2311 such as exicyclog, but they have never been used in the exim_install
2312 script (though there are many overriding facilities there). I have
2313 arranged that the exim_install script now takes note of these two
2316 PH/35 Installed configuration files for Dragonfly.
2318 PH/36 When a locally submitted message by a trusted user did not contain a
2319 From: header, and the sender address was obtained from -f or from an SMTP
2320 MAIL command, and the trusted user did not use -F to supply a sender
2321 name, $originator_name was incorrectly used when constructing a From:
2322 header. Furthermore, $originator_name was used for submission mode
2323 messages from external hosts without From: headers in a similar way,
2324 which is clearly wrong.
2326 PH/37 Added control=suppress_local_fixups.
2328 PH/38 When log_selector = +received_sender was set, and the addition of the
2329 sender made the log line's construction buffer exactly full, or one byte
2330 less than full, an overflow happened when the terminating "\n" was
2333 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2334 when the result of a list match is failure because a DNS lookup failed.
2336 PH/40 RM_COMMAND is now used in the building process.
2338 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2339 the "build-* directories that it finds.
2341 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2342 address in a domain literal was a prefix of an interface address.
2344 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2345 when verifying a sender address, unless rewrite_headers is false.
2347 PH/44 Wrote a long comment about why errors_to addresses are verified as
2348 recipients, not senders.
2350 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2351 the ratelimit ACL was added.
2353 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2355 PH/46 Added extra information about PostgreSQL errors to the error string.
2357 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2358 avoiding the need to install special zones in a real server. This is
2359 backwards compatible; if it can't find the fake resolver, it drops back.
2360 Thus, both old and new test suites can be run.
2362 TF/02 Added util/ratelimit.pl
2364 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2365 clock is set back in time.
2367 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2368 Candler <B.Candler@pobox.com>.
2370 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2371 OK for addresses that are the result of redirections.
2373 PH/48 A number of further additions for the benefit of the new test suite,
2374 including a fake gethostbyname() that interfaces to the fake DNS resolver
2377 TF/06 The fix for widen_domains has also been applied to qualify_single and
2378 search_parents which are the other dnslookup options that can cause
2381 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2384 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2386 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2387 service" if it encountered an MX record with an empty target hostname.
2388 The message is now "an MX or SRV record indicated no SMTP service".
2390 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2391 if the DNS of the sending site is misconfigured. This is quite a
2392 common situation. This change restores the behaviour of treating a
2393 helo verification defer as a failure.
2395 PH/51 If self=fail was set on a router, the bounce message did not include the
2396 actual error message.
2402 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2404 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2405 command itself ended in error, the underlying message about the transport
2406 filter timeout was being overwritten with the pipe command error. Now the
2407 underlying error message should be appended to the second error message.
2409 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2411 PH/02 Reduce the amount of output that "make" produces by default. Full output
2412 can still be requested.
2414 PH/03 The warning log line about a condition test deferring for a "warn" verb
2415 was being output only once per connection, rather than after each
2416 occurrence (because it was using the same function as for successful
2417 "warn" verbs). This seems wrong, so I have changed it.
2419 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2420 it should not have, which might have caused a crash in the right
2421 circumstances, but probably never did.
2423 PH/04 Installed a modified version of Tony Finch's patch to make submission
2424 mode fix the return path as well as the Sender: header line, and to
2425 add a /name= option so that you can make the user's friendly name appear
2428 TF/03 Added the control = fakedefer ACL modifier.
2430 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2431 Mark Lowes for thorough testing.
2433 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2435 TK/03 Merged latest SRS patch from Miles Wilton.
2437 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2438 with the definition in sysexits.h (which is #included earlier).
2439 Fortunately, Exim does not actually use EX_OK. The code used to try to
2440 preserve the sysexits.h value, by assumimg that macro definitions were
2441 scanned for macro replacements. I have been disabused of this notion,
2442 so now the code just undefines EX_OK before #including unistd.h.
2444 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2445 in the smtp transport. When a block could not be written in a single
2446 write() function, the timeout was being re-applied to each part-write.
2447 This seems wrong - if the receiver was accepting one byte at a time it
2448 would take for ever. The timeout is now adjusted when this happens. It
2449 doesn't have to be particularly precise.
2451 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2452 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2454 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2455 without a domain if the check to <postmaster@domain> fails.
2457 SC/01 Eximstats: added -xls and the ability to specify output files
2458 (patch written by Frank Heydlauf).
2460 SC/02 Eximstats: use FileHandles for outputing results.
2462 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2464 SC/04 Eximstats: fixed display of large numbers with -nvr option
2466 SC/05 Eximstats: fixed merging of reports with empty tables.
2468 SC/06 Eximstats: added the -include_original_destination flag
2470 SC/07 Eximstats: removed tabs and trailing whitespace.
2472 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2474 TK/06 MBOX spool code: Add real "From " MBOX separator line
2475 so the .eml file is really in mbox format (even though
2476 most programs do not really care). Patch from Alex Miller.
2478 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2479 The latter is generated from $received_to and is only set if the
2480 message has one envelope recipient. SA can use these headers,
2481 obviously out-of-the-box. Patch from Alex Miller.
2483 PH/08 The ${def test on a variable was returning false if the variable's
2484 value was "0", contrary to what the specification has always said!
2485 The result should be true unless the variable is empty.
2487 PH/09 The syntax error of a character other than { following "${if
2488 def:variable_name" (after optional whitespace) was not being diagnosed.
2489 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2490 accidental colon was present, for example, could give incorrect results.
2492 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2493 result is used (not including appendfile, where other changes are about
2496 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2497 This involved changing a lot of size variables from int to off_t. It
2498 should work with maildirs and everything.
2500 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2501 spamd dying while we are connected to it.
2503 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2506 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2507 function for BDB 4.3.
2509 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2511 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2512 the sources for PCRE have been re-arranged and more files are now
2515 PH/15 The code I had for printing potentially long long variables in PH/11
2516 above was not the best (it lost precision). The length of off_t variables
2517 is now inspected at build time, and an appropriate printing format (%ld
2518 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2519 to be "long long int" or "long int". This is needed for the internal
2520 formatting function string_vformat().
2522 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2523 the configuration file to be ":syslog", then the script "guesses" where
2524 the logs files are, rather than using the compiled in default. In our
2525 case the guess is not the same as the compiled default, so the script
2526 suddenly stopped working when I started to use syslog. The patch checks
2527 to see if log_file_path is "". If so, it attempts to read it from exim
2528 with no configuration file to get the compiled in version, before it
2529 falls back to the previous guessing code."
2531 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2532 implementing BATV in an Exim configuration. See NewStuff for the gory
2535 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2536 Makefile that are specific to HP-UX.
2538 PH/18 If the "use_postmaster" option was set for a recipient callout together
2539 with the "random" option, the postmaster address was used as the MAIL
2540 FROM address for the random test, but not for the subsequent recipient
2541 test. It is now used for both.
2543 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2544 patch removes a few documentation additions to RFC 3028, because the
2545 latest draft now contains them. It adds the new en;ascii-case comparator
2546 and a new error check for 8bit text in MIME parts. Comparator and
2547 require names are now matched exactly. I enabled the subaddress
2548 extension, but it is not well tested yet (read: it works for me)."
2550 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2551 rework some of the code of TK/09 above to avoid the hardwired use of
2552 "%lld" and "long long". Replaced the call to snprintf() with a call to
2555 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2556 records point to non-existent hosts", "retry timeout exceeded", and
2557 "retry time not reached for any host after a long failure period".
2559 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2560 experimental DomainKeys support:
2562 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2563 (2) On an error such as an illegally used "control", the wrong name for
2564 the control was given.
2566 These problems did NOT occur unless DomainKeys support was compiled.
2568 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2570 PH/24 Added ${if match_ip condition.
2572 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2573 databases so that it will be absolutely obvious if a crash occurs in the
2574 DB library. This is a regular occurrence (often caused by mis-matched
2577 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2578 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2579 picked up on a user's system that detects such things. There doesn't seem
2580 to be a gcc warning option for this - only an attribute that has to be
2581 put on the function's prototype. It seems that in Fedora Core 4 they have
2582 set this on a number of new functions. No doubt there will be more in due
2585 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2586 specify a transport. However, if an address that was verified by such a
2587 router was the subject of a callout, Exim crashed because it tried to
2588 read the rcpt_include_affixes from the non-existent transport. Now it
2589 just assumes that the setting of that option is false. This bug was
2590 introduced by 4.51/PH/31.
2592 PH/28 Changed -d+all to exclude +memory, because that information is very
2593 rarely of interest, but it makes the output a lot bigger. People tend to
2594 do -d+all out of habit.
2596 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2597 code in os-type was giving problems when libc.so lives in lib64, like on
2600 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2601 aren't the modern standard, and it seems that some systems' include files
2602 don't always have them. Exim was already checking for some of the newer
2603 ones like T_AAAA, and defining it itself. I've added checks for all the
2604 record types that Exim uses.
2606 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2607 not automatically generating a new one, as it is supposed to. This
2608 prevented TLS from working. If the file did exist, but contained invalid
2609 data, a new version was generated, as expected. It was only the case of a
2610 non-existent file that was broken.
2612 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2613 with a change in libdomainkeys > 0.64.
2615 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2616 from DNS. If the selector record carries the flag, it now has
2617 precedence over the domain-wide flag.
2619 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2621 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2622 the use of a port name that isn't defined in /etc/services) occurred, the
2623 message was deferred as in a normal delivery, and thus remained on the
2624 spool, instead of being failed because of the mua_wrapper setting. This
2625 is now fixed, and I tidied up some of the mua_wrapper messages at the
2628 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2629 the messages in a hash of arrays rather than using individual hashes.
2630 This is a bit cleaner and results in dramatic memory savings, albeit
2631 at a slight CPU cost.
2633 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2634 as requested by Marc Sherman.
2636 SC/10 Eximstats: added histograms for user specified patterns as requested
2639 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2641 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2642 fopen() in the content-scanning modules that did not already have it.
2648 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2649 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2651 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2653 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2655 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2656 to test Sieve filters that use "vacation".
2658 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2659 that changes the way the GnuTLS parameters are stored in the cache file.
2660 The new format can be generated externally. For backward compatibility,
2661 if the data in the cache doesn't make sense, Exim assumes it has read an
2662 old-format file, and it generates new data and writes a new file. This
2663 means that you can't go back to an older release without removing the
2666 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2667 work if there are any delivery delays because "one_time" forces the
2668 parent to be marked "delivered", so its unseen clone is never tried
2669 again. For this reason, Exim now forbids the simultaneous setting of
2672 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2673 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2674 entry if you want to know the details. The fix, however, neglected to
2675 consider the case when local delivery batching is involved. The test for
2676 "previously delivered" was not happening when checking to see if an
2677 address could be batched with a previous (undelivered) one; under
2678 certain circumstances this could lead to multiple deliveries to the same
2681 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2682 in its include files, and this causes problems building Exim.
2684 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2685 header_syntax) but Exim was just ignoring anything given after a slash.
2686 In particular, this caused confusion with an attempt to use "verify =
2687 reverse_host_lookup/defer_ok". An error is now given when options are
2688 supplied for verify items that do not have them. (Maybe reverse_host_
2689 lookup should have a defer_ok option, but that's a different point.)
2691 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2692 defined by RFC 821) to 2048, because there were problems with some AUTH
2693 commands, and RFC 1869 says the size should be increased for extended
2694 SMTP commands that take arguments.
2696 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2699 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2700 "unknown" error; now it says that the functionality isn't in the binary.
2702 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2703 an address' error message when a string expansion fails (syntax or
2704 whatever). Otherwise the password may appear in the log. Following change
2705 PH/42 below, there is no longer a chance of it appearing in a bounce
2708 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2710 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2711 of its addresses was ever tried. (Bugzilla bug #2.)
2713 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2714 the result incorrectly in the debug output. (It correctly added a newline
2715 to what was transported.)
2717 TF/01 Added $received_time.
2719 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2720 commented out examples of how to interface to a virus scanner and to
2721 SpamAssassin. Also added commented examples of av_scanner and
2722 spamd_address settings.
2724 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2725 and controls are allowed in which ACLs. There were a couple of minor
2726 errors. Some of the entries in the conditions table (which is a table of
2727 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2728 negation of where the condition IS allowed.
2730 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2732 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2733 header file does not have a version number, so I've had to invent a new
2734 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2735 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2736 radiusclient), but it was contributed by a Radius user.
2738 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2739 files or directories, for OpenSSL.
2741 PH/19 When an Exim process that is running as root has to create an Exim log
2742 file, it does so in a subprocess that runs as exim:exim so as to get the
2743 ownership right at creation (otherwise, other Exim processes might see
2744 the file with the wrong ownership). There was no test for failure of this
2745 fork() call, which would lead to the process getting stuck as it waited
2746 for a non-existent subprocess. Forks do occasionally fail when resources
2747 run out. I reviewed all the other calls to fork(); they all seem to check
2750 PH/20 When checking for unexpected SMTP input at connect time (before writing
2751 the banner), Exim was not dealing correctly with a non-positive return
2752 from the read() function. If the client had disconnected by this time,
2753 the result was a log entry for a synchronization error with an empty
2754 string after "input=" when read() returned zero. If read() returned -1
2755 (an event I could not check), uninitialized data bytes were printed.
2756 There were reports of junk text (parts of files, etc) appearing after
2759 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2761 PH/22 Added support for macro redefinition, and (re)definition in between
2762 driver and ACL definitions.
2764 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2765 forgetting to use the resulting value; it was using the unexpanded value.
2767 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2768 hadn't been configured. The fix is from Juergen Kreileder, who
2769 understands it better than I do:
2771 "Here's what I see happening with three configured cyrus_sasl
2772 authenticators configured (plain, login, cram-md5):
2774 On startup auth_cyrus_sasl_init() gets called for each of these.
2775 This means three calls to sasl_listmech() without a specified mech_list.
2776 => SASL tests which mechs of all available mechs actually work
2777 => three warnings about OTP not working
2778 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2780 With the patch, sasl_listmech() also gets called three times. But now
2781 SASL's mech_list option is set to the server_mech specified in the the
2782 authenticator. Or in other words, the answer from sasl_listmech()
2783 gets limited to just the mech you're testing for (which is different
2785 => the return list contains just 'plain' or 'login', 'cram-md5' or
2786 nothing depending on the value of ob->server_mech.
2788 I've just tested the patch: Authentication still works fine,
2789 unavailable mechs specified in the exim configuration are still
2790 caught, and the auth.log warnings about OTP are gone."
2792 PH/25 When debugging is enabled, the contents of the command line are added
2793 to the debugging output, even when log_selector=+arguments is not
2796 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2797 answer is "GNU", and only if the return is "GNU/something" is the answer
2800 PH/27 $acl_verify_message is now set immediately after the failure of a
2801 verification in an ACL, and so is available in subsequent modifiers. In
2802 particular, the message can be preserved by coding like this:
2804 warn !verify = sender
2805 set acl_m0 = $acl_verify_message
2807 Previously, $acl_verify_message was set only while expanding "message"
2808 and "log_message" when a very denied access.
2810 PH/28 Modified OS/os.c-Linux with
2812 -#ifndef OS_LOAD_AVERAGE
2813 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2815 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2816 nomenclature these days.)
2818 PH/29 Installed patch from the Sieve maintainer that adds the options
2819 sieve_useraddress and sieve_subaddress to the redirect router.
2821 PH/30 In these circumstances:
2822 . Two addresses routed to the same list of hosts;
2823 . First host does not offer TLS;
2824 . First host accepts first address;
2825 . First host gives temporary error to second address;
2826 . Second host offers TLS and a TLS session is established;
2827 . Second host accepts second address.
2828 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2829 and peerdn, if requested) that were in fact used only for the second
2832 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2833 attention to any local part prefix or suffix that was matched by the
2834 router that accepted the address. It now behaves in the same way as it
2835 does for delivery: the affixes are removed from the local part unless
2836 rcpt_include_affixes is set on the transport.
2838 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2839 timeout during the DATA phase of an incoming message.
2841 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2842 applied a patch sanctioned by the Sieve maintainer.
2844 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2845 the uid or gid is negative. A case of a negative gid caused this to be
2846 noticed. The fix allows for either to be negative.
2848 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2849 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2852 PH/36 The change PH/12 above was broken. Fixed it.
2854 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2855 the grounds that routing the same address twice would always produce the
2856 same answer. This might have been true once, but it is certainly no
2857 longer true now. Routing a child address may depend on the previous
2858 routing that produced that child. Some complicated redirection strategies
2859 went wrong when messages had multiple recipients, and made Exim's
2860 behaviour dependent on the order in which the addresses were given.
2862 I have moved the duplicate checking until after the routing is complete.
2863 Exim scans the addresses that are assigned to local and remote
2864 transports, and removes any duplicates. This means that more work will be
2865 done, as duplicates will always all be routed, but duplicates are
2866 presumably rare, so I don't expect this is of any significance.
2868 For deliveries to pipes, files, and autoreplies, the duplicate checking
2869 still happens during the routing process, since they are not going to be
2872 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2873 It corrects a timeout issue with spamd. This is Ian's comment: "The
2874 background is that sometimes spamd either never reads data from a
2875 connection it has accepted, or it never writes response data. The exiscan
2876 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2877 blindly assumes that writes won't block so it may never time out."
2879 PH/39 Allow G after quota size as well as K and M.
2881 PH/40 The value set for $authenticated_id in an authenticator may not contain
2882 binary zeroes or newlines because the value is written to log lines and
2883 to spool files. There was no check on this. Now the value is run through
2884 the string_printing() function so that such characters are converted to
2885 printable escape sequences.
2887 PH/41 $message_linecount is a new variable that contains the total number of
2888 lines in the message. Compare $body_linecount, which is the count for the
2891 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2892 bounce and delay warning messages, except in certain special cases, which
2895 (a) An SMTP error message from a remote host;
2896 (b) A message specified in a :fail: redirection;
2897 (c) A message specified in a "fail" command in a system filter;
2898 (d) A message specified in a FAIL return from the queryprogram router;
2899 (e) A message specified by the cannot_route_message router option.
2901 In these cases only, Exim does include the error details in bounce and
2902 warning messages. There are also a few cases where bland messages such
2903 as "unrouteable address" or "local delivery error" are given.
2905 PH/43 $value is now also set for the "else" part of a ${run expansion.
2907 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2908 being worked on, but at least Exim now implements the latest version to
2911 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2912 process to complete was treated as a delivery failure, a timeout while
2913 writing the message to the pipe was logged, but erroneously treated as a
2914 successful delivery. Such timeouts include transport filter timeouts. For
2915 consistency with the overall process timeout, these timeouts are now
2916 treated as errors, giving rise to delivery failures by default. However,
2917 there is now a new Boolean option for the pipe transport called
2918 timeout_defer, which, if set TRUE, converts the failures into defers for
2919 both kinds of timeout. A transport filter timeout is now identified in
2922 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2923 systems where "make" and "gmake" are different, calling "gmake" at top
2924 level broke things. I've arranged for the value of $(MAKE) to be passed
2925 from the Makefile to this script so that it can call the same version of
2929 A note about Exim versions 4.44 and 4.50
2930 ----------------------------------------
2932 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2933 changes of various kinds. As a consequence, a big documentation update was
2934 needed. This delayed the release for rather longer than seemed good, especially
2935 in the light of a couple of (minor) security issues. Therefore, the changes
2936 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2937 release. So 4.44 and 4.50 are in effect two different branches that both start
2940 I have left the 4.50 change log unchanged; it contains all the changes since
2941 4.43. The change log for 4.44 is below; many of its items are identical to
2942 those for 4.50. This seems to be the most sensible way to preserve the
2943 historical information.
2949 1. Minor wording change to the doc/README.SIEVE file.
2951 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2952 computation of the current number of files was incorrect.
2954 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2955 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2958 4. Give more explanation in the error message when the command for a transport
2959 filter fails to execute.
2961 5. There are several places where Exim runs a non-Exim command in a
2962 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2963 was being done only for the command run by the queryprogram router. It is
2964 now done for all such subprocesses. The other cases are: ${run, transport
2965 filters, and the commands run by the lmtp and pipe transports.
2967 6. Added CONFIGURE_GROUP build-time option.
2969 7. Some older OS have a limit of 256 on the maximum number of file
2970 descriptors. Exim was using setrlimit() to set 1000 as a large value
2971 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2972 systems. I've change it so that if it can't get 1000, it tries for 256.
2974 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2975 was an oversight, and furthermore, ever since the addition of extra
2976 controls (e.g. 4.43/32), the checks on when to allow different forms of
2977 "control" were broken. There should now be diagnostics for all cases when a
2978 control that does not make sense is encountered.
2980 9. Added the /retain_sender option to "control=submission".
2982 10. $recipients is now available in the predata ACL (oversight).
2984 11. Tidy the search cache before the fork to do a delivery from a message
2985 received from the command line. Otherwise the child will trigger a lookup
2986 failure and thereby defer the delivery if it tries to use (for example) a
2987 cached ldap connection that the parent has called unbind on.
2989 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2990 of $address_data from the recipient verification was clobbered by the
2991 sender verification.
2993 13. The value of address_data from a sender verification is now available in
2994 $sender_address_data in subsequent conditions in the ACL statement.
2996 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2998 15. Added a new option "connect=<time>" to callout options, to set a different
3001 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3002 was its contents. (It was OK if the option was not defined at all.)
3004 17. A "Completed" log line is now written for messages that are removed from
3005 the spool by the -Mrm option.
3007 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3008 information about exactly what failed.
3010 19. Added -dd to debug only the daemon process.
3012 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3013 handles timeouts, both on the server side and network timeouts. Renamed the
3014 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3016 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3017 It is now set to "smtps".
3019 22. $host_address is now set to the target address during the checking of
3020 ignore_target_hosts.
3022 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3023 being passed; this would have caused $sender_host_name to have been used if
3024 matching the list had actually called for a host name (not very likely,
3025 since this list is usually IP addresses). A host name is now passed as
3028 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3029 code that specifies a non-restarting handler (typically sigaction() in
3030 modern systems) in an attempt to fix a rare and obscure crash bug.
3032 25. Narrowed the window for a race in the daemon that could cause it to ignore
3033 SIGCHLD signals. This is not a major problem, because they are used only to
3034 wake it up if nothing else does.
3036 26. A malformed maildirsize file could cause Exim to calculate negative values
3037 for the mailbox size or file count. Odd effects could occur as a result.
3038 The maildirsize information is now recalculated if the size or filecount
3041 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3042 support for a long time. Removed HAVE_SYS_VFS_H.
3044 28. Installed the latest version of exipick from John Jetmore.
3046 29. In an address list, if the pattern was not a regular expression, an empty
3047 subject address (from a bounce message) matched only if the pattern was an
3048 empty string. Non-empty patterns were not even tested. This was the wrong
3049 because it is perfectly reasonable to use an empty address as part of a
3050 database query. An empty address is now tested by patterns that are
3051 lookups. However, all the other forms of pattern expect the subject to
3052 contain a local part and a domain, and therefore, for them, an empty
3053 address still always fails if the pattern is not itself empty.
3055 30. Exim went into a mad DNS loop when attempting to do a callout where the
3056 host was specified on an smtp transport, and looking it up yielded more
3057 than one IP address.
3059 31. Re-factored the code for checking spool and log partition space into a
3060 function that finds that data and another that does the check. The former
3061 is then used to implement four new variables: $spool_space, $log_space,
3062 $spool_inodes, and $log_inodes.
3064 32. The RFC2047 encoding function was originally intended for short strings
3065 such as real names; it was not keeping to the 75-character limit for
3066 encoded words that the RFC imposes. It now respects the limit, and
3067 generates multiple encoded words if necessary. To be on the safe side, I
3068 have increased the buffer size for the ${rfc2047: expansion operator from
3071 33. It is now permitted to omit both strings after an "if" condition; if the
3072 condition is true, the result is "true". As before, when the second string
3073 is omitted, a false condition yields an empty string. This makes it less
3074 cumbersome to write custom ACL and router conditions.
3076 34. Failure to deliver a bounce message always caused it to be frozen, even if
3077 there was an errors_to setting on the router. The errors_to setting is now
3080 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3081 canonical form (fully expanded) before being placed in
3082 $sender_host_address.
3084 36. The table in the code that translates DNS record types into text (T_A to
3085 "A" for instance) was missing entries for NS and CNAME. It is just possible
3086 that this could have caused confusion if both these types were looked up
3087 for the same domain, because the text type is used as part of Exim's
3088 per-process caching. But the chance of anyone hitting this buglet seems
3091 37. The dnsdb lookup has been extended in a number of ways.
3093 (1) There is a new type, "zns", which walks up the domain tree until it
3094 finds some nameserver records. It should be used with care.
3096 (2) There is a new type, "mxh", which is like "mx" except that it returns
3097 just the host names, not the priorities.
3099 (3) It is now possible to give a list of domains (or IP addresses) to be
3100 looked up. The behaviour when one of the lookups defers can be
3101 controlled by a keyword.
3103 (4) It is now possible to specify the separator character for use when
3104 multiple records are returned.
3106 38. The dnslists ACL condition has been extended: it is now possible to supply
3107 a list of IP addresses and/or domains to be looked up in a particular DNS
3110 39. Added log_selector=+queue_time_overall.
3112 40. When running the queue in the test harness, wait just a tad after forking a
3113 delivery process, to get repeatability of debugging output.
3115 41. Include certificate and key file names in error message when GnuTLS fails
3116 to set them up, because the GnuTLS error message doesn't include the name
3117 of the failing file when there is a problem reading it.
3119 42. Allow both -bf and -bF in the same test run.
3121 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3123 44. The "Exiscan patch" is now merged into the mainline Exim source.
3125 45. Sometimes the final signoff response after QUIT could fail to get
3126 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3127 < 0 before doing a fflush(). This bug looks as though it goes back to the
3128 introduction of TLS in release 3.20, but "sometimes" must have been rare
3129 because the tests only now provoked it.
3131 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3132 (this can affect the format of dates).
3134 47. exim_tidydb, when checking for the continued existence of a message for
3135 which it has found a message-specific retry record, was not finding
3136 messages that were in split spool directories. Consequently, it was
3137 deleting retry records that should have stayed in existence.
3139 48. Steve fixed some bugs in eximstats.
3141 49. The SPA authentication driver was not abandoning authentication and moving
3142 on to the next authenticator when an expansion was forced to fail,
3143 contradicting the general specification for all authenticators. Instead it
3144 was generating a temporary error. It now behaves as specified.
3146 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3147 (the order specifies the preference for clients). The order is now AES256,
3148 AES128, 3DES, ARCFOUR128.
3150 51. Small patch to Sieve code - explicitly set From: when generating an
3153 52. Exim crashed if a remote delivery caused a very long error message to be
3154 recorded - for instance if somebody sent an entire SpamAssassin report back
3155 as a large number of 550 error lines. This bug was coincidentally fixed by
3156 increasing the size of one of Exim's internal buffers (big_buffer) that
3157 happened as part of the Exiscan merge. However, to be on the safe side, I
3158 have made the code more robust (and fixed the comments that describe what
3161 53. Now that there can be additional text after "Completed" in log lines (if
3162 the queue_time_overall log selector is set), a one-byte patch to exigrep
3163 was needed to allow it to recognize "Completed" as not the last thing in
3166 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3167 patch that reportedly fixes this has been added. I am not expert enough to
3168 create a test for it. This is what the patch creator wrote:
3170 "I found a little strange behaviour of ldap code when working with
3171 Windows 2003 AD Domain, where users was placed in more than one
3172 Organization Units. When I tried to give exim partial DN, the exit code
3173 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3174 But simultaneously result of request was absolutely normal ldap result,
3175 so I produce this patch..."
3177 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3178 REFERENCE, so I have modified the code to exclude the patch when that macro
3181 55. Some experimental protocols are using DNS PTR records for new purposes. The
3182 keys for these records are domain names, not reversed IP addresses. The
3183 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3184 leaves it alone. Component reversal etc. now happens only for IP addresses.
3187 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3189 57. Double the size of the debug message buffer (to 2048) so that more of very
3190 long debug lines gets shown.
3192 58. The exicyclog utility now does better if the number of log files to keep
3193 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3195 59. Two changes related to the smtp_active_hostname option:
3197 (1) $smtp_active_hostname is now available as a variable.
3198 (2) The default for smtp_banner uses $smtp_active_hostname instead
3199 of $primary_hostname.
3201 60. The host_aton() function is supposed to be passed a string that is known
3202 to be a valid IP address. However, in the case of IPv6 addresses, it was
3203 not checking this. This is a hostage to fortune. Exim now panics and dies
3204 if the condition is not met. A case was found where this could be provoked
3205 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3206 components; fortuitously, this particular loophole had already been fixed
3207 by change 4.50/55 above.
3209 If there are any other similar loopholes, the new check in host_aton()
3210 itself should stop them being exploited. The report I received stated that
3211 data on the command line could provoke the exploit when Exim was running as
3212 exim, but did not say which command line option was involved. All I could
3213 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3214 running as the user.
3217 61. There was a buffer overflow vulnerability in the SPA authentication code
3218 (which came originally from the Samba project). I have added a test to the
3219 spa_base64_to_bits() function which I hope fixes it.
3222 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3223 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3225 63. The daemon start-up calls getloadavg() while still root for those OS that
3226 need the first call to be done as root, but it missed one case: when
3227 deliver_queue_load_max is set with deliver_drop_privilege. This is
3228 necessary for the benefit of the queue runner, because there is no re-exec
3229 when deliver_drop_privilege is set.
3231 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3232 This has been fixed.
3234 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3235 was in use, was not putting the data itself into the right store pool;
3236 consequently, it could be overwritten for a subsequent message in the same
3237 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3240 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3242 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3243 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3244 the function were treating the return as a boolean value, which happened to
3245 work because 0=false and not-0=true, but is not correct code.
3247 68. The host_aton() function was not handling scoped IPv6 addresses (those
3248 with, for example, "%eth0" on the end) correctly.
3250 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3251 negated items (that is, ~something) in unsigned ints. Some compilers
3252 apparently mutter when there is no cast.
3254 70. If an address verification called from an ACL failed, and did not produce a
3255 user-specific message (i.e. there was only a "system" message), nothing was
3256 put in $acl_verify_message. In this situation, it now puts the system
3259 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3260 session; change 4.31/43 added the unwanted input to the log line - except
3261 that it did not do this in the start of session case. It now does.
3263 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3264 This is wrong and can cause the other end to generate a synchronization
3265 error if it is another Exim or anything else that does the synchronization
3266 check. A QUIT command is no longer sent after a timeout.
3268 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3269 during host lookups.
3271 74. The defer_ok option of callout verification was not working if it was used
3272 when verifying addresses in header lines, that is, for this case:
3274 verify = header_sender/callout=defer_ok
3276 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3277 those file descriptors could be used for SMTP connections. If anything
3278 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3279 could be sent to the SMTP client, causing chaos. The daemon now opens
3280 stdin, stdout, and stderr to /dev/null when it puts itself into the
3283 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3284 log by default. The user can override this with suitable Perl magic.
3286 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3287 the log message when discard triggers, was not working for the DATA ACL or
3288 for the non-SMTP ACL.
3290 78. Error message wording change in sieve.c.
3292 79. If smtp_accept_max_per_host was set, the number of connections could be
3293 restricted to fewer than expected, because the daemon was trying to set up
3294 a new connection before checking whether the processes handling previous
3295 connections had finished. The check for completed processes is now done
3296 earlier. On busy systems, this bug wouldn't be noticed because something
3297 else would have woken the daemon, and it would have reaped the completed
3300 80. If a message was submitted locally by a user whose login name contained one
3301 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3302 It caused a spool format error. I have fixed the spool reading code. A
3303 related problem was that the "from" clause in the Received: line became
3304 illegal because of the space(s). It is now covered by ${quote_local_part.
3306 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3309 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3311 83. Patch from Sieve maintainer to fix unterminated string problem in
3312 "vacation" handling.
3314 84. Some minor changes to the Linux configuration files to help with other
3315 OS variants using glibc.
3317 85. One more patch for Sieve to update vacation handling to latest spec.
3320 ----------------------------------------------------
3321 See the note above about the 4.44 and 4.50 releases.
3322 ----------------------------------------------------
3328 1. Change 4.43/35 introduced a bug that caused file counts to be
3329 incorrectly computed when quota_filecount was set in an appendfile
3332 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3333 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3336 3. Give more explanation in the error message when the command for a transport
3337 filter fails to execute.
3339 4. There are several places where Exim runs a non-Exim command in a
3340 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3341 was being done only for the command run by the queryprogram router. It is
3342 now done for all such subprocesses. The other cases are: ${run, transport
3343 filters, and the commands run by the lmtp and pipe transports.
3345 5. Some older OS have a limit of 256 on the maximum number of file
3346 descriptors. Exim was using setrlimit() to set 1000 as a large value
3347 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3348 systems. I've change it so that if it can't get 1000, it tries for 256.
3350 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3351 was an oversight, and furthermore, ever since the addition of extra
3352 controls (e.g. 4.43/32), the checks on when to allow different forms of
3353 "control" were broken. There should now be diagnostics for all cases when a
3354 control that does not make sense is encountered.
3356 7. $recipients is now available in the predata ACL (oversight).
3358 8. Tidy the search cache before the fork to do a delivery from a message
3359 received from the command line. Otherwise the child will trigger a lookup
3360 failure and thereby defer the delivery if it tries to use (for example) a
3361 cached ldap connection that the parent has called unbind on.
3363 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3364 of $address_data from the recipient verification was clobbered by the
3365 sender verification.
3367 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3368 was its contents. (It was OK if the option was not defined at all.)
3370 11. A "Completed" log line is now written for messages that are removed from
3371 the spool by the -Mrm option.
3373 12. $host_address is now set to the target address during the checking of
3374 ignore_target_hosts.
3376 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3377 being passed; this would have caused $sender_host_name to have been used if
3378 matching the list had actually called for a host name (not very likely,
3379 since this list is usually IP addresses). A host name is now passed as
3382 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3383 code that specifies a non-restarting handler (typically sigaction() in
3384 modern systems) in an attempt to fix a rare and obscure crash bug.
3386 15. Narrowed the window for a race in the daemon that could cause it to ignore
3387 SIGCHLD signals. This is not a major problem, because they are used only to
3388 wake it up if nothing else does.
3390 16. A malformed maildirsize file could cause Exim to calculate negative values
3391 for the mailbox size or file count. Odd effects could occur as a result.
3392 The maildirsize information is now recalculated if the size or filecount
3395 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3396 support for a long time. Removed HAVE_SYS_VFS_H.
3398 18. Updated exipick to current release from John Jetmore.
3400 19. Allow an empty sender to be matched against a lookup in an address list.
3401 Previously the only cases considered were a regular expression, or an
3404 20. Exim went into a mad DNS lookup loop when doing a callout where the
3405 host was specified on the transport, if the DNS lookup yielded more than
3408 21. The RFC2047 encoding function was originally intended for short strings
3409 such as real names; it was not keeping to the 75-character limit for
3410 encoded words that the RFC imposes. It now respects the limit, and
3411 generates multiple encoded words if necessary. To be on the safe side, I
3412 have increased the buffer size for the ${rfc2047: expansion operator from
3415 22. Failure to deliver a bounce message always caused it to be frozen, even if
3416 there was an errors_to setting on the router. The errors_to setting is now
3419 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3420 canonical form (fully expanded) before being placed in
3421 $sender_host_address.
3423 24. Updated eximstats to version 1.33
3425 25. Include certificate and key file names in error message when GnuTLS fails
3426 to set them up, because the GnuTLS error message doesn't include the name
3427 of the failing file when there is a problem reading it.
3429 26. Expand error message when OpenSSL has problems setting up cert/key files.
3432 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3433 (this can affect the format of dates).
3435 28. exim_tidydb, when checking for the continued existence of a message for
3436 which it has found a message-specific retry record, was not finding
3437 messages that were in split spool directories. Consequently, it was
3438 deleting retry records that should have stayed in existence.
3440 29. eximstats updated to version 1.35
3441 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3442 1.35 - bugfix such that pie charts by volume are generated correctly
3444 30. The SPA authentication driver was not abandoning authentication and moving
3445 on to the next authenticator when an expansion was forced to fail,
3446 contradicting the general specification for all authenticators. Instead it
3447 was generating a temporary error. It now behaves as specified.
3449 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3450 (the order specifies the preference for clients). The order is now AES256,
3451 AES128, 3DES, ARCFOUR128.
3453 31. Small patch to Sieve code - explicitly set From: when generating an
3456 32. Exim crashed if a remote delivery caused a very long error message to be
3457 recorded - for instance if somebody sent an entire SpamAssassin report back
3458 as a large number of 550 error lines. This bug was coincidentally fixed by
3459 increasing the size of one of Exim's internal buffers (big_buffer) that
3460 happened as part of the Exiscan merge. However, to be on the safe side, I
3461 have made the code more robust (and fixed the comments that describe what
3464 33. Some experimental protocols are using DNS PTR records for new purposes. The
3465 keys for these records are domain names, not reversed IP addresses. The
3466 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3467 leaves it alone. Component reversal etc. now happens only for IP addresses.
3470 34. The host_aton() function is supposed to be passed a string that is known
3471 to be a valid IP address. However, in the case of IPv6 addresses, it was
3472 not checking this. This is a hostage to fortune. Exim now panics and dies
3473 if the condition is not met. A case was found where this could be provoked
3474 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3475 components; fortuitously, this particular loophole had already been fixed
3476 by change 4.50/55 or 4.44/33 above.
3478 If there are any other similar loopholes, the new check in host_aton()
3479 itself should stop them being exploited. The report I received stated that
3480 data on the command line could provoke the exploit when Exim was running as
3481 exim, but did not say which command line option was involved. All I could
3482 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3483 running as the user.
3486 35. There was a buffer overflow vulnerability in the SPA authentication code
3487 (which came originally from the Samba project). I have added a test to the
3488 spa_base64_to_bits() function which I hope fixes it.
3491 36. The daemon start-up calls getloadavg() while still root for those OS that
3492 need the first call to be done as root, but it missed one case: when
3493 deliver_queue_load_max is set with deliver_drop_privilege. This is
3494 necessary for the benefit of the queue runner, because there is no re-exec
3495 when deliver_drop_privilege is set.
3497 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3498 was in use, was not putting the data itself into the right store pool;
3499 consequently, it could be overwritten for a subsequent message in the same
3500 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3503 38. Sometimes the final signoff response after QUIT could fail to get
3504 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3505 < 0 before doing a fflush(). This bug looks as though it goes back to the
3506 introduction of TLS in release 3.20, but "sometimes" must have been rare
3507 because the tests only now provoked it.
3513 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3514 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3515 Now it returns an integer. A number of calls were still expecting a T/F
3516 return. Fortuitously, in all cases, the tests worked in OK situations,
3517 which is the norm. However, things would have gone wrong on any write
3518 failures on the smtp file descriptor. This function is used when sending
3519 messages over SMTP and also when doing verify callouts.
3521 2. When Exim is called to do synchronous delivery of a locally submitted
3522 message (the -odf or -odi options), it no longer closes stderr before doing
3525 3. Implemented the mua_wrapper option.
3527 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3529 5. Implemented the functions header_remove(), header_testname(),
3530 header_add_at_position(), and receive_remove_recipient(), and exported them
3533 6. If an ACL "warn" statement specified the addition of headers, Exim already
3534 inserted X-ACL-Warn: at the start if there was no header name. However, it
3535 was not making this test for the second and subsequent header lines if
3536 there were newlines in the string. This meant that an invalid header could
3537 be inserted if Exim was badly configured.
3539 7. Allow an ACL "warn" statement to add header lines at the start or after all
3540 the Received: headers, as well as at the end.
3542 8. Added the rcpt_4xx retry error code.
3544 9. Added postmaster_mailfrom=xxx to callout verification option.
3546 10. Added mailfrom=xxxx to the callout verification option, for verify=
3549 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3550 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3552 12. Inserted some casts to stop certain compilers warning when using pointer
3553 differences as field lengths or precisions in printf-type calls (mostly
3554 affecting debugging statements).
3556 13. Added optional readline() support for -be (dynamically loaded).
3558 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3559 same clock tick as a message's arrival, so that its received time was the
3560 same as the "first fail" time on the retry record, and that message
3561 remained on the queue past the ultimate address timeout, every queue runner
3562 would try a delivery (because it was past the ultimate address timeout) but
3563 after another failure, the ultimate address timeout, which should have then
3564 bounced the address, did not kick in. This was a "< instead of <=" error;
3565 in most cases the first failure would have been in the next clock tick
3566 after the received time, and all would be well.
3568 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3569 being recognized when the domain list was tested by the match_domain
3570 condition in an expansion string.
3572 16. Added the ${str2b64: operator.
3574 17. Exim was always calling setrlimit() to set a large limit for the number of
3575 processes, without checking whether the existing limit was already
3576 adequate. (It did check for the limit on file descriptors.) Furthermore,
3577 errors from getrlimit() and setrlimit() were being ignored. Now they are
3578 logged to the main and panic logs, but Exim does carry on, to try to do its
3579 job under whatever limits there are.
3581 18. Imported PCRE 5.0.
3583 19. Trivial typo in log message " temporarily refused connection" (the leading
3586 20. If the log selector return_path_on_delivery was set and an address was
3587 redirected to /dev/null, the delivery process crashed because it assumed
3588 that a return path would always be set for a "successful" delivery. In this
3589 case, the whole delivery is bypassed as an optimization, and therefore no
3592 21. Internal re-arrangement: the function for sending a challenge and reading
3593 a response while authentication was assuming a zero-terminated challenge
3594 string. It's now changed to take a pointer and a length, to allow for
3595 binary data in such strings.
3597 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3599 23. Exim was not respecting finduser_retries when seeking the login of the
3600 uid under which it was called; it was always trying 10 times. (The default
3601 setting of finduser_retries is zero.) Also, it was sleeping after the final
3602 failure, which is pointless.
3604 24. Implemented tls_on_connect_ports.
3606 25. Implemented acl_smtp_predata.
3608 26. If the domain in control=submission is set empty, Exim assumes that the
3609 authenticated id is a complete email address when it generates From: or
3610 Sender: header lines.
3612 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3613 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3614 chown and chgrp in /bin and hostname in /usr/bin.
3616 28. Exim was keeping the "process log" file open after each use, just as it
3617 does for the main log. This opens the possibility of it remaining open for
3618 long periods when the USR1 signal hits a daemon. Occasional processlog
3619 errors were reported, that could have been caused by this. Anyway, it seems
3620 much more sensible not to leave this file open at all, so that is what now
3623 29. The long-running daemon process does not normally write to the log once it
3624 has entered its main loop, and it closes the log before doing so. This is
3625 so that log files can straightforwardly be renamed and moved. However,
3626 there are a couple of unusual error situations where the daemon does write
3627 log entries, and I had neglected to close the log afterwards.
3629 30. The text of an SMTP error response that was received during a remote
3630 delivery was being truncated at 512 bytes. This is too short for some of
3631 the long messages that one sometimes sees. I've increased the limit to
3634 31. It is now possible to make retry rules that apply only when a message has a
3635 specific sender, in particular, an empty sender.
3637 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3638 it possible to be selective about when SMTP synchronization is enforced.
3640 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3642 32. Implemented hosts_connection_nolog.
3644 33. Added an ACL for QUIT.
3646 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3649 35. Added mailbox_size and mailbox_filecount to appendfile.
3651 36. Added control = no_multiline_responses to ACLs.
3653 37. There was a bug in the logic of the code that waits for the clock to tick
3654 in the case where the clock went backwards by a substantial amount such
3655 that the microsecond fraction of "now" was more than the microsecond
3656 fraction of "then" (but the whole seconds number was less).
3658 38. Added support for the libradius Radius client library this is found on
3659 FreeBSD (previously only the radiusclient library was supported).
3665 1. When certain lookups returned multiple values in the form name=value, the
3666 quoting of the values was not always being done properly. Specifically:
3667 (a) If the value started with a double quote, but contained no whitespace,
3669 (b) If the value contained whitespace other than a space character (i.e.
3670 tabs or newlines or carriage returns) it was not quoted.
3671 This fix has been applied to the mysql and pgsql lookups by writing a
3672 separate quoting function and calling it from the lookup code. The fix
3673 should probably also be applied to nisplus, ibase and oracle lookups, but
3674 since I cannot test any of those, I have not disturbed their existing code.
3676 2. A hit in the callout cache for a specific address caused a log line with no
3677 reason for rejecting RCPT. Now it says "Previous (cached) callout
3678 verification failure".
3680 3. There was an off-by-one bug in the queryprogram router. An over-long
3681 return line was truncated at 256 instead of 255 characters, thereby
3682 overflowing its buffer with the terminating zero. As well as fixing this, I
3683 have increased the buffer size to 1024 (and made a note to document this).
3685 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3686 when Exim is waiting for an SMTP response from a remote server, Exim
3687 restarts its select() call on the socket, thereby resetting its timeout.
3688 This is not a problem when such interrupts are rare. Somebody set up a cron
3689 job to run exiwhat every 2 minutes, which is less than the normal select()
3690 timeout (5 or 10 minutes). This meant that the select() timeout never
3691 kicked in because it was always reset. I have fixed this by comparing the
3692 time when an interrupt arrives with the time at the start of the first call
3693 to select(). If more time than the timeout has elapsed, the interrupt is
3694 treated as a timeout.
3696 5. Some internal re-factoring in preparation for the addition of Sieve
3697 extensions (by MH). In particular, the "personal" test is moved to a
3698 separate function, and given an option for scanning Cc: and Bcc: (which is
3699 not set for Exim filters).
3701 6. When Exim created an email address using the login of the caller as the
3702 local part (e.g. when creating a From: or Sender: header line), it was not
3703 quoting the local part when it contained special characters such as @.
3705 7. Installed new OpenBSD configuration files.
3707 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3708 try to make them clearer.
3710 9. Callout options, other than the timeout value, were being ignored when
3711 verifying sender addresses in header lines. For example, when using
3713 verify = header_sender/callout=no_cache
3715 the cache was (incorrectly) being used.
3717 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3718 only the Cygwin environment.
3720 11. When return_path_on_delivery was set as a log selector, if different remote
3721 addresses in the same message used different return paths and parallel
3722 remote delivery occurred, the wrong values would sometimes be logged.
3723 (Whenever a remote delivery process finished, the return path value from
3724 the most recently started remote delivery process was logged.)
3726 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3727 lines when AUTH and/or TLS are in use. This is the "received protocol"
3728 field. Exim used to use "asmtp" for authenticated SMTP, without any
3729 indication (in the protocol name) for TLS use. Now it follows the RFC and
3730 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3731 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3732 names appear in log lines as well as in Received: header lines.
3734 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3735 extensions, and comparison tests, and to fix some bugs.
3737 14. Changes to the "personal" filter test:
3739 (1) The test was buggy in that it was just doing the equivalent of
3740 "contains" tests on header lines. For example, if a user's address was
3741 anne@some.where, the "personal" test would incorrectly be true for
3743 To: susanne@some.where
3745 This test is now done by extracting each address from the header in turn,
3746 and checking the entire address. Other tests that are part of "personal"
3747 are now done using regular expressions (for example, to check local parts
3748 of addresses in From: header lines).
3750 (2) The list of non-personal local parts in From: addresses has been
3751 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3752 taken from the Sieve specification recommendations.
3754 (3) If the message contains any header line starting with "List-" it is
3755 treated as non-personal.
3757 (4) The test for "circular" in the Subject: header line has been removed
3758 because it now seems ill-conceived.
3760 15. Minor typos in src/EDITME comments corrected.
3762 16. Installed latest exipick from John Jetmore.
3764 17. If headers_add on a router specified a text string that was too long for
3765 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3766 of string_sprintf() is now avoided.
3768 18. $message_body_size was not set (it was always zero) when running the DATA
3769 ACL and the local_scan() function.
3771 19. For the "mail" command in an Exim filter, no default was being set for
3772 the once_repeat time, causing a random time value to be used if "once" was
3773 specified. (If the value happened to be <= 0, no repeat happened.) The
3774 default is now 0s, meaning "never repeat". The "vacation" command was OK
3775 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3776 (I found it when inspecting the code).
3778 20. There is now an overall timeout for performing a callout verification. It
3779 defaults to 4 times the callout timeout, which applies to individual SMTP
3780 commands during the callout. The overall timeout applies when there is more
3781 than one host that can be tried. The timeout is checked before trying the
3782 next host. This prevents very long delays if there are a large number of
3783 hosts and all are timing out (e.g. when the network connections are timing
3784 out). The value of the overall timeout can be changed by specifying an
3785 additional sub-option for "callout", called "maxwait". For example:
3787 verify = sender/callout=5s,maxwait=20s
3789 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3790 to the end before writing, but this should make it even safer).
3792 22. Exim was forgetting that it had advertised PIPELINING for the second and
3793 subsequent messages on an SMTP connection. It was also not resetting its
3794 memory on STARTTLS and an internal HELO.
3796 23. When Exim logs an SMTP synchronization error within a session, it now
3797 records whether PIPELINING has been advertised or not.
3799 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3800 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3801 rather than long int.
3803 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3805 26. Added the never_mail option to autoreply.
3811 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3812 crash if the getsockname() call failed; this can happen if a connection is
3813 closed very soon after it is established. The problem was simply in the
3814 order in which certain operations were done, causing Exim to try to write
3815 to the SMTP stream before it had set up the file descriptor. The bug has
3816 been fixed by making things happen in the correct order.
3822 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3823 before the connection was closed, thus losing the rejection response.
3825 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3826 some early Solaris releases, but causes trouble in current releases where
3827 socklen_t is defined.
3829 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3832 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3835 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3836 that releasing the top of it at the end releases what was used for sub-
3837 expansions (unless the block got too big). However, discard this block if
3838 the first thing is a variable or header, so that we can use its block when
3839 it is dynamic (useful for very large $message_headers, for example).
3841 6. Lookups now cache *every* query, not just the most recent. A new, separate
3842 store pool is used for this. It can be recovered when all lookup caches are
3843 flushed. Lookups now release memory at the end of their result strings.
3844 This has involved some general refactoring of the lookup sources.
3846 7. Some code has been added to the store_xxx() functions to reduce the amount
3847 of flapping under certain conditions.
3849 8. log_incoming_interface used to affect only the <= reception log lines. Now
3850 it causes the local interface and port to be added to several more SMTP log
3851 lines, for example "SMTP connection from", and rejection lines.
3853 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3855 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3857 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3858 could be overwritten at the end of the current message (or the start of a
3859 new message if it was set in a HELO ACL). The value is now preserved for
3860 the duration of the SMTP connection.
3862 12. If a transport had a headers_rewrite setting, and a matching header line
3863 contained an unqualified address, that address was qualified, even if it
3864 did not match any rewriting rules. The underlying bug was that the values
3865 of the flags that permit the existence of unqualified sender and recipient
3866 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3867 non-local messages, and by -bnq for local messages) were not being
3868 preserved with the message after it was received.
3870 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3871 "next input=" as part of the text comprising the host identity instead of
3872 the correct text. The code was using the same buffer for two different
3873 strings. However, depending on which order the printing function evaluated
3874 its arguments, the bug did not always show up. Under Linux, for example, my
3875 test suite worked just fine.
3877 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3878 doesn't work with some older versions of Perl. It has been changed to "my",
3879 which in any case is probably the better facility to use.
3881 15. A really picky compiler found some instances of statements for creating
3882 error messages that either had too many or two few arguments for the format
3885 16. The size of the buffer for calls to the DNS resolver has been increased
3886 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3887 for addresses that have a lot of PTR records. This alleviates a problem; it
3888 does not fully solve it.
3890 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3891 buffer now truncates the list and logs the incident, which is the same
3892 action as happens when Exim is looking up a host name and its aliases.
3893 Previously in this situation something unpredictable would happen;
3894 sometimes it was "internal error: store_reset failed".
3896 18. If a server dropped the connection unexpectedly when an Exim client was
3897 using GnuTLS and trying to read a response, the client delivery process
3898 crashed while trying to generate an error log message.
3900 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3901 string, for example:
3903 warn message = H1: something\nH2: something
3905 the text was added as a single header line from Exim's point of view
3906 though it ended up OK in the delivered message. However, searching for the
3907 second and subsequent header lines using $h_h2: did not work. This has been
3908 fixed. Similarly, if a system filter added multiple headers in this way,
3909 the routers could not see them.
3911 20. Expanded the error message when iplsearch is called with an invalid key to
3912 suggest using net-iplsearch in a host list.
3914 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3915 ACLs are no longer actually imposed (and a message to that effect is
3918 22. If a "gecos" field in a passwd entry contained escaped characters, in
3919 particular, if it contained a \" sequence, Exim got it wrong when building
3920 a From: or a Sender: header from that name. A second bug also caused
3921 incorrect handling when an unquoted " was present following a character
3922 that needed quoting.
3924 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3925 was not being matched caselessly.
3927 24. Arranged for all hyphens in the exim.8 source to be escaped with
3930 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3931 properly. Recipient callout cache records were still being keyed to include
3932 the sender, even when use_sender was set false. This led to far more
3933 callouts that were necessary. The sender is no longer included in the key
3934 when use_sender is false.
3936 26. Added "control = submission" modifier to ACLs.
3938 27. Added the ${base62d: operator to decode base 62 numbers.
3940 28. dnsdb lookups can now access SRV records.
3942 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3943 the configuration file.
3945 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3946 (-v) mode. This makes the output for a verbose queue run more intelligible.
3948 31. Added a use_postmaster feature to recipient callouts.
3950 32. Added the $body_zerocount variable, containing the number of binary zero
3951 bytes in the message body.
3953 33. The time of last modification of the "new" subdirectory is now used as the
3954 "mailbox time last read" when there is a quota error for a maildir
3957 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3959 35. Added +ignore_unknown as a special item in host lists.
3961 36. Code for decoding IPv6 addresses in host lists is now included, even if
3962 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3963 address was recognized as an IP address, but was then not correctly decoded
3964 into binary, causing unexpected and incorrect effects when compared with
3971 1. Very minor rewording of debugging text in manualroute to say "list of
3972 hosts" instead of "hostlist".
3974 2. If verify=header_syntax was set, and a header line with an unqualified
3975 address (no domain) and a large number of spaces between the end of the
3976 name and the colon was received, the reception process suffered a buffer
3977 overflow, and (when I tested it) crashed. This was caused by some obsolete
3978 code that should have been removed. The fix is to remove it!
3980 3. When running in the test harness, delay a bit after writing a bounce
3981 message to get a bit more predictability in the log output.
3983 4. Added a call to search_tidyup() just before forking a reception process. In
3984 theory, someone could use a lookup in the expansion of smtp_accept_max_
3985 per_host which, without the tidyup, could leave open a database connection.
3987 5. Added the variables $recipient_data and $sender_data which get set from a
3988 lookup success in an ACL "recipients" or "senders" condition, or a router
3989 "senders" option, similar to $domain_data and $local_part_data.
3991 6. Moved the writing of debug_print from before to after the "senders" test
3994 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3995 problems for message scanning, either using a data ACL, or using
3996 local_scan() because the Received: header was not generated till after they
3997 were called (in order to set the time as the time of reception completion).
3998 I have revised the way this works. The header is now generated after the
3999 body is received, but before the ACL or local_scan() are called. After they
4000 are run, the timestamp in the header is updated.
4006 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4007 before starting a queue runner without re-exec. This happened only when
4008 deliver_drop_privilege was set or when the Exim user was set to root. The
4009 effect of the bug was that timeouts during subsequent deliveries caused
4010 crashes instead of being properly handled. The handler is now left at its
4011 default (and expected) setting.
4013 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4014 message, again when deliver_drop_privilege is set or Exim is run as root.
4015 The bug described in (1) was not present in this case, but the tidying up
4016 of the other signals was missing. I have made the two cases consistent.
4018 3. The ignore_target_hosts setting on a manualroute router was being ignored
4019 for hosts that were looked up using the /MX notation.
4021 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4024 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4025 operated on the sender address. After changing the $sender_address to <>
4026 for the sender address verify, Exim was re-instated it as the original
4027 (before rewriting) address, but remembering that it had rewritten it, so it
4028 wasn't rewriting it again. This bug also had the effect of breaking the
4029 sender address verification caching when the sender address was rewritten.
4031 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4032 This has been changed so that if the ip literal address matches
4033 ignore_target_hosts, the router declines.
4035 7. Added expansion conditions match_domain, match_address, and match_local_
4036 part (NOT match_host).
4038 8. The placeholder for the Received: header didn't have a length field set.
4040 9. Added code to Exim itself and to exim_lock to test for a specific race
4041 condition that could lead to file corruption when using MBX delivery. The
4042 issue is with the lockfile that is created in /tmp. If this file is removed
4043 after a process has opened it but before that process has acquired a lock,
4044 there is the potential for a second process to recreate the file and also
4045 acquire a lock. This could lead to two Exim processes writing to the file
4046 at the same time. The added code performs the same test as UW imapd; it
4047 checks after acquiring the lock that its file descriptor still refers to
4048 the same named file.
4050 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4051 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4054 11. Added the smtp_active_hostname option. If used, this will typically be made
4055 to depend on the incoming interface address. Because $interface_address is
4056 not set up until the daemon has forked a reception process, error responses
4057 that can happen earlier (such as "too many connections") no longer contain
4060 12. If an expansion in a condition on a "warn" statement fails because a lookup
4061 defers, the "warn" statement is abandoned, and the next ACL statement is
4062 processed. Previously this caused the whole ACL to be aborted.
4064 13. Added the iplsearch lookup type.
4066 14. Added ident_timeout as a log selector.
4068 15. Added tls_certificate_verified as a log selector.
4070 16. Added a global option tls_require_ciphers (compare the smtp transport
4071 option of the same name). This controls incoming TLS connections.
4073 17. I finally figured out how to make tls_require_ciphers do a similar thing
4074 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4075 before starting the TLS session.
4077 18. Tabs are now shown as \t in -bP output.
4079 19. If the log selector return_path_on_delivery was set, Exim crashed when
4080 bouncing a message because it had too many Received: header lines.
4082 20. If two routers both had headers_remove settings, and the first one included
4083 a superfluous trailing colon, the final name in the first list and the
4084 first name in the second list were incorrectly joined into one item (with a
4085 colon in the middle).
4091 1. Added -C and -D options to the exinext utility, mainly to make it easier
4092 to include in the automated testing, but these could be helpful when
4093 multiple configurations are in use.
4095 2. The exinext utility was not formatting the output nicely when there was
4096 an alternate port involved in the retry record key, nor when there was a
4097 message id as well (for retries that were specific to a specific message
4098 and a specific host). It was also confused by IPv6 addresses, because of
4099 the additional colons they contain. I have fixed the IPv4 problem, and
4100 patched it up to do a reasonable job for IPv6.
4102 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4103 delivery, the log line now contains "pipelined" if PIPELINING was used.
4105 4. An SMTP transport process used to panic and die if the bind() call to set
4106 an explicit outgoing interface failed. This has been changed; it is now
4107 treated in the same way as a connect() failure.
4109 5. A reference to $sender_host_name in the part of a conditional expansion
4110 that was being skipped was still causing a DNS lookup. This no longer
4113 6. The def: expansion condition was not recognizing references to header lines
4114 that used bh_ and bheader_.
4116 7. Added the _cache feature to named lists.
4118 8. The code for checking quota_filecount in the appendfile transport was
4119 allowing one more file than it should have been.
4121 9. For compatibility with Sendmail, the command line option
4129 and sets the incoming protocol and host name (for trusted callers). The
4130 host name and its colon can be omitted when only the protocol is to be set.
4131 Note the Exim already has two private options, -pd and -ps, that refer to
4132 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4133 "s", but I don't think that's a major issue.
4135 10. A number of refactoring changes to the code, none of which should affect
4138 (a) The number of logging options was getting close to filling up the
4139 32-bit word that was used as a bit map. I have split them into two classes:
4140 those that are passed in the argument to log_write(), and those that are
4141 only ever tested independently outside of that function. These are now in
4142 separate 32-bit words, so there is plenty of room for expansion again.
4143 There is no change in the user interface or the logging behaviour.
4145 (b) When building, for example, log lines, the code previously used a
4146 macro that called string_cat() twice, in order to add two strings. This is
4147 not really sufficiently general. Furthermore, there was one instance where
4148 it was actually wrong because one of the argument was used twice, and in
4149 one call a function was used. (As it happened, calling the function twice
4150 did not affect the overall behaviour.) The macro has been replaced by a
4151 function that can join an arbitrary number of extra strings onto a growing
4154 (c) The code for expansion conditions now uses a table and a binary chop
4155 instead of a serial search (which was left over from when there were very
4156 few conditions). Also, it now recognizes conditions like "pam" even when
4157 the relevant support is not compiled in: a suitably worded error message is
4158 given if an attempt is made to use such a condition.
4160 11. Added ${time_interval:xxxxx}.
4162 12. A bug was causing one of the ddress fields not to be passed back correctly
4163 from remote delivery subprocesses. The field in question was not being
4164 subsequently used, so this caused to problems in practice.
4166 13. Added new log selectors queue_time and deliver_time.
4168 14. Might have fixed a bug in maildirsizefile handling that threw up
4169 "unexpected character" debug warnings, and recalculated the data
4170 unnecessarily. In any case, I expanded the warning message to give more
4173 15. Added the message "Restricted characters in address" to the statements in
4174 the default ACL that block characters like @ and % in local parts.
4176 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4177 Three changes have been made:
4179 (a) There was a serious bug; a negative response to MAIL caused the whole
4180 recipient domain to be cached as invalid, thereby blocking all messages
4181 to all local parts at the same domain, from all senders. This bug has
4182 been fixed. The domain is no longer cached after a negative response to
4183 MAIL if the sender used is not empty.
4185 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4188 (c) A new callout option, "use_sender" has been added for people who want
4189 the modified behaviour.
4195 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4198 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4199 indeed breaks things for older releases.
4201 3. Added additional logging to the case where there is a problem reading data
4202 from a filter that is running in a subprocess using a pipe, in order to
4203 try to track down a specific problem.
4205 4. Testing facility fudge: when running in the test harness and attempting
4206 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4207 getting "No route to host". Convert this to a timeout.
4209 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4212 6. Some OS don't have socklen_t but use size_t instead. This affects the
4213 fifth argument of getsockopt() amongst other things. This is now
4214 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4215 can be set for individual OS. I have set it for SunOS5, OSF1, and
4216 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4217 some earlier ones do not.
4219 7. Change 4.30/15 was not doing the test caselessly.
4221 8. The standard form for an IPv6 address literal was being rejected by address
4222 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4223 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4224 this, as well as the form without the "IPv6" on the front (but only when
4225 address literals are enabled, of course).
4227 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4229 10. Exim crashed if a message with an empty sender address specified by -f
4230 encountered a router with an errors_to setting. This could be provoked only
4231 by a command such as
4235 where an empty string was supplied; "<>" did not hit this bug.
4237 11. Installed PCRE release 4.5.
4239 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4240 remained set. It is now erased.
4242 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4243 times from message ids (which are base 36 rather than the normal 62).
4245 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4246 were being counted as actual protocol errors, and logged if the log
4247 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4248 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4249 and DATA following a set of rejected RCPTs do not count as protocol errors.
4250 In other words, Exim assumes they were pipelined, though this may not
4251 actually be the case. Of course, in all cases the client gets an
4252 appropriate error code.
4254 15. If a lookup fails in an ACL condition, a message about the failure may
4255 be available; it is used if testing the ACL cannot continue, because most
4256 such messages specify what the cause of the deferral is. However, some
4257 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4258 that caused an old message to be retained and used if a later statement
4259 caused a defer, replacing the real cause of the deferral.
4261 16. If an IP address had so many PTR records that the DNS lookup buffer
4262 was not large enough to hold them, Exim could crash while trying to process
4263 the truncated data. It now detects and logs this case.
4265 17. Further to 4.21/58, another change has been made: if (and only if) the
4266 first line of a message (the first header line) ends with CRLF, a bare LF
4267 in a subsequent header line has a space inserted after it, so as not to
4268 terminate the header.
4270 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4271 unnecessarily, used atoi() instead of strtol(), and didn't check the
4272 termination when getting file sizes from file names by regex.
4274 19. Completely re-implemented the support for maildirsize files, in the light
4275 of a number of problems with the previous contributed implementation
4276 (4.30/29). In particular:
4278 . If the quota is zero, the maildirsize file is maintained, but no quota is
4281 . If the maildir directory does not exist, it is created before any attempt
4282 to write a maildirsize file.
4284 . The quota value in the file is just a cache; if the quota is changed in
4285 the transport, the new value overrides.
4287 . A regular expression is available for excluding directories from the
4290 20. The autoreply transport checks the characters in options that define the
4291 message's headers; it allows continued headers, but it was checking with
4292 isspace() after an embedded newline instead of explicitly looking for a
4295 21. If all the "regular" hosts to which an address was routed had passed their
4296 expiry times, and had not reached their retry times, the address was
4297 bounced, even if fallback hosts were defined. Now Exim should go on to try
4300 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4301 equivalent code in the SMTP transport. Some hosts send humungous responses
4302 to HELO/EHLO, more than 1024 it seems.
4304 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4305 gives compiler warnings in some environments. I've now done it "properly",
4308 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4309 (because of problems with the built-in one) was declared to return uschar *
4310 instead of char *, causing compiler failure.
4312 25. Fixed a file descriptor leak when processing alias/forward files.
4314 26. Fixed a minor format string issue in dbfn.c.
4316 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4318 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4319 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4322 29. When a sender address is verified, it is cached, to save repeating the test
4323 when there is more than one recipient in a message. However, when the
4324 verification involves a callout, it is possible for different callout
4325 options to be set for different recipients. It is too complicated to keep
4326 track of this in the cache, so now Exim always runs a verification when a
4327 callout is required, relying on the callout cache for the optimization.
4328 The overhead is duplication of the address routing, but this should not be
4331 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4332 to be verified with callout=postmaster, and the main callout worked but the
4333 postmaster check failed, the verification correctly failed. However, if a
4334 subsequent RCPT command asked for sender verification *without* the
4335 postmaster check, incorrect caching caused this verification also to fail,
4338 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4339 it was not caching the DNS options (qualify_single, search_parents) that
4340 were used when the lookup failed. A subsequent lookup with different
4341 options therefore always gave the same answer, though there were cases
4342 where it should not have. (Example: a "domains = !$mx_any" option on a
4343 dnslookup router: the "domains" option is always processed without any
4344 widening, but the router might have qualify_single set.) Now Exim uses the
4345 cached value only when the same options are set.
4347 32. Added John Jetmore's "exipick" utility to the distribution.
4349 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4350 than a timeout (e.g. a certificate is required, and is not provided), an
4351 Exim server now closes the connection immediately. Previously it waited for
4352 the client to close - but if the client is SSL, it seems that they each
4353 wait for each other, leading to a delay before one of them times out.
4355 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4356 maintained 0.8.x compatibility because I don't think many are using it, and
4357 it is clearly obsolete.
4359 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4362 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4363 client certificate was expired. A simple patch fixes this, though I don't
4364 understand the full logic of why the verify callback is called multiple
4367 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4368 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4369 which causes problems with some clients (such as the Certicom SSL Plus
4370 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4371 disables the coutermeasure allowing Eudora to connect."
4373 38. Exim was not checking that a write() to a log file succeeded. This could
4374 lead to Bad Things if a log got too big, in particular if it hit a file
4375 size limit. Exim now panics and dies if it cannot write to a log file, just
4376 as it does if it cannot open a log file.
4378 39. Modified OS/Makefile-Linux so that it now contains
4380 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4382 The two -D definitions ensure that Exim is compiled with large file
4383 support, which makes it possible to handle log files that are bigger than
4386 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4387 instance) a domain was checked against a named list that involved a lookup,
4388 causing $domain_data to be set, then another domain was checked against the
4389 same list, then the first domain was re-checked, the value of $domain_data
4390 after the final check could be wrong. In particular, if the second check
4391 failed, it could be set empty. This bug probably also applied to
4394 41. The strip_trailing_dot option was not being applied to the address given
4395 with the -f command-line option.
4397 42. The code for reading a message's header from the spool was incrementing
4398 $received_count, but never initializing it. This meant that the value was
4399 incorrect (doubled) while delivering a message in the same process in which
4400 it was received. In the most common configuration of Exim, this never
4401 happens - a fresh exec is done - but it can happen when
4402 deliver_drop_privilege is set.
4404 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4405 it now includes up to 150 characters of the unexpected data in the log
4408 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4409 and building data strings. The size of both of these buffers was 10 000
4410 bytes - far larger than anybody would *ever* want, thought I. Needless to
4411 say, somebody hit the limit. I have increased the maximum line length to
4412 20 000 and the maximum data length of concatenated lines to 100 000. I have
4413 also fixed two bugs, because there was no checking on these buffers. Tsk,
4414 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4415 buffer is too small.
4417 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4418 lsearch lookups. Now it does.
4420 46. When parsing a route_list item in a manualroute router, a fixed-length
4421 buffer was used for the list of hosts. I made this 1024 bytes long,
4422 thinking that nobody would ever have a list of hosts that long. Wrong.
4423 Somebody had a whole pile of complicated expansion conditions, and the
4424 string was silently truncated, leading to an expansion error. It turns out
4425 that it is easier to change to an unlimited length (owing to other changes
4426 that have happened since this code was originally written) than to build
4427 structure for giving a limitation error. The length of the item that
4428 expands into the list of hosts is now unlimited.
4430 47. The lsearch lookup could not handle data where the length of text line was
4431 more than 4095 characters. Such lines were truncated, leading to shortened
4432 data being returned. It should now handle lines of any length.
4434 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4435 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4438 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4439 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4440 no longer happens in comment lines. A list of replacements is now placed
4441 at the head of all of the source files, except those whose only change is
4442 to replace PERL_COMMAND in the very first #! line.
4444 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4445 messages on the queue, with a bottom-up merge sort, using code contributed
4446 by Michael Haardt. This should make operations like -bp somewhat faster on
4447 large queues. It won't affect queue runners, except when queue_run_in_order
4450 51. Installed eximstats 1.31 in the distribution.
4452 52. Added support for SRV lookups to the dnslookup router.
4454 53. If an ACL referred to $message_body or $message_body_end, the value was not
4455 reset for any messages that followed in the same SMTP session.
4457 54. The store-handling optimization for building very long strings was not
4458 differentiating between the different store pools. I don't think this
4459 actually made any difference in practice, but I've tidied it.
4461 55. While running the routers to verify a sender address, $sender_address
4462 was still set to the sender address. This is wrong, because when routing to
4463 send a bounce to the sender, it would be empty. Therefore, I have changed
4464 it so that, while verifying a sender address, $sender_address is set to <>.
4465 (There is no change to what happens when verifying a recipient address.)
4467 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4468 target A or AAAA records (if not already returned) without resetting the
4469 qualify_single or search_parents options of the DNS resolver. These are
4470 inappropriate in this case because the targets of MX and SRV records must
4471 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4472 target that, when qualified, matched something in the local domain. These
4473 two options are now turned off when doing these lookups.
4475 57. It seems that at least some releases of Reiserfs (which does not have the
4476 concept of a fixed number of inodes) returns zero and not -1 for the
4477 number of available inodes. This interacted badly with check_spool_inodes,
4478 which assumed that -1 was the "no such thing" setting. What I have done is
4479 to check that the total number of inodes is greater than zero before doing
4480 the test of how many are available.
4482 58. When a "warn" ACL statement has a log_message modifier, the message is
4483 remembered, and not repeated. This is to avoid a lot of repetition when a
4484 message has many recipients that cause the same warning to be written.
4485 Howewer, Exim was preserving the list of already written lines for an
4486 entire SMTP session, which doesn't seem right. The memory is now reset if a
4487 new message is started.
4489 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4490 debugging output unless log_rewrite was also set.
4492 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4493 of (int)(handle) when we know that handle contains (void *)(-1).
4495 61. The Exim daemon panic-logs an error return when it closes the incoming
4496 connection. However "connection reset by peer" seems to be common, and
4497 isn't really an error worthy of noting specially, so that particular error
4500 62. When Exim is trying to find all the local interfaces, it used to panic and
4501 die if the ioctl to get the interface flags failed. However, it seems that
4502 on at least one OS (Solaris 9) it is possible to have an interface that is
4503 included in the list of interfaces, but for which you get a failure error
4504 for this call. This happens when the interface is not "plumbed" into a
4505 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4506 failure of the "get flags" call assumes that the interface is down.
4508 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4509 makes life easier for people who are doing arithmetic on fields extracted
4510 from dates, where you often get leading zeros that should not be
4511 interpreted as octal.
4513 64. Added qualify_domain to the redirect router, to override the global
4516 65. If a pathologically long header line contained very many addresses (the
4517 report of this problem mentioned 10 000) and each of them was rewritten,
4518 Exim could use up a very large amount of memory. (It kept on making new
4519 copies of the header line as it rewrote, and never released the old ones.)
4520 At the expense of a bit more processing, the header rewriting function has
4521 been changed so that it no longer eats memory in this way.
4523 66. The generation of the Received: header has been moved from the time that a
4524 message starts to be received, to the time that it finishes. The timestamp
4525 in the Received: header should now be very close to that of the <= log
4526 line. There are two side-effects of this change:
4528 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4529 logged header lines no longer include the local Received: line, because
4530 it has not yet been created. The same applies to a copy of the message
4531 that is returned to a non-SMTP sender when a message is rejected.
4533 (b) When a filter file is tested using -bf, no additional Received: header
4534 is added to the test message. After some thought, I decided that this
4537 This change does not affect the value of $received_for. It is still set
4538 after address rewriting, but before local_scan() is called.
4540 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4542 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4543 gave an unhelpful panic error message, and a defer error. I have managed to
4544 change this behaviour so that it now rejects any supplied certificate,
4545 which seems right, as the list of acceptable certificates is empty.
4547 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4548 gave an unhelpful defer error. I have not managed to make this reject any
4549 supplied certificates, but the error message it gives is "no certificate
4550 supplied", which is not helpful.
4552 70. exigrep's output now also includes lines that are not associated with any
4553 message, but which match the given pattern. Implemented by a patch from
4554 Martin Sluka, which also tidied up the Perl a bit.
4556 71. Recipient callout verification, like sender verification, was using <> in
4557 the MAIL FROM command. This isn't really the right thing, since the actual
4558 sender may affect whether the remote host accepts the recipient or not. I
4559 have changed it to use the actual sender in the callout; this means that
4560 the cache record is now keyed on a recipient/sender pair, not just the
4561 recipient address. There doesn't seem to be a real danger of callout loops,
4562 since a callout by the remote host to check the sender would use <>.
4563 [SEE ABOVE: changed after hitting problems.]
4565 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4566 temporary errors. However, in the case of such a code being given after
4567 the end of a data transmission (i.e. after ".") Exim was failing to write
4568 a retry record for the message. (Yes, there was some broken host that was
4569 actually sending 8xx at this point.)
4571 73. An unknown lookup type in a host list could cause Exim to panic-die when
4572 the list was checked. (An example that provoked this was putting <; in the
4573 middle of a list instead of at the start.) If this happened during a DATA
4574 ACL check, a -D file could be left lying around. This kind of configuration
4575 error no longer causes Exim to die; instead it causes a defer errror. The
4576 incident is still logged to the main and panic logs.
4578 74. Buglet left over from Exim 3 conversion. The message "too many messages
4579 in one connection" was written to the rejectlog but not the mainlog, except
4580 when address rewriting (yes!) was being logged.
4582 75. Added write_rejectlog option.
4584 76. When a system filter was run not as root (that is, when system_filter_user
4585 was set), the values of the $n variables were not being returned to the
4586 main process; thus, they were not subsequently available in the $sn
4589 77. Added +return_path_on_delivery log selector.
4591 78. A connection timeout was being treated differently from recipients deferred
4592 when testing hosts_max_try with a message that was older than the host's
4593 retry timeout. (The host should not be counted, thus allowing all hosts to
4594 be tried at least once before bouncing.) This may have been the cause of an
4595 occasionally reported bug whereby a message would remain on the queue
4596 longer than the retry timeout, but would be bounced if a delivery was
4597 forced. I say "may" because I never totally pinned down the problem;
4598 setting up timeout/retry tests is difficult. See also the next item.
4600 79. The ultimate address timeout was not being applied to errors that involved
4601 a combination of host plus message (for example, a timeout on a MAIL
4602 command). When an address resolved to a number of possible hosts, and they
4603 were not all tried for each delivery (e.g. because of hosts_max_try), a
4604 message could remain on the queue longer than the retry timeout.
4606 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4609 81. Fixed an obscure SMTP outgoing bug which required at least the following
4610 conditions: (a) there was another message waiting for the same server;
4611 (b) the server returned 5xx to all RCPT commands in the first message so
4612 that the message was not completed; (c) the server dropped the connection
4613 or gave a negative response to the RSET that Exim sends to abort the
4614 transaction. The observed case was a dropped connection after DATA that had
4615 been sent in pipelining mode. That is, the server had advertised PIPELINING
4616 but was not implementing it correctly. The effect of the bug was incorrect
4617 behaviour, such as trying another host, and this could lead to a crash.
4623 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4624 and daemon.c were passed as pointers to ints; they should have been
4625 pointers to socklen_t variables (which are typically unsigned ints).
4627 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4630 3. Fixed a really odd bug that affected only the testing scheme; patching a
4631 certain fixed string in the binary changed the value of another string that
4632 happened to be identical to the end of the original first string.
4634 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4635 name", it returns that address as the IP address. On some operating
4636 systems (e.g. Solaris), it also passes back the IP address string as the
4637 "host name". However, on others (e.g. Linux), it passes back an empty
4638 string. Exim wasn't checking for this, and was changing the host name to an
4639 empty string, assuming it had been canonicized.
4641 5. Although rare, it is permitted to have more than one PTR record for a given
4642 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4643 all the names associated with an address, because they do in Solaris.
4644 However, it seems that they do not in Linux for data that comes from the
4645 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4646 I found this out when I moved to a new Linux workstation and tried to run
4647 the Exim test suite.
4649 To get round this problem I have changed the code so that it now does its
4650 own call to the DNS to look up PTR records when searching for a host name.
4651 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4652 addresses that are only in /etc/hosts are still found.
4654 This behaviour is, however, controlled by an option called host_lookup_
4655 order, which defaults to "bydns:byaddr". If people want to use the other
4656 order, or indeed, just use one or the other means of lookup, they can
4657 specify it in this variable.
4659 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4660 some operating systems, this comes back from gethostbyaddr() as an empty
4661 string, and this is what Exim used to test for. However, it seems that in
4662 other systems, "." is yielded. Exim now tests for this case too.
4664 7. The values of check_spool_space and check_log_space are now held internally
4665 as a number of kilobytes instead of an absolute number of bytes. If a
4666 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4667 kilobyte. This means that much larger values can be stored.
4669 8. Exim monitor: an attempt to get the action menu when not actually pointing
4670 at a message produces an empty menu entitled "No message selected". This
4671 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4672 no entries in it ("Shell widget menu has zero width and/or height"). So I
4673 have added a single, blank menu entry in this case.
4675 9. Added ${quote_local_part.
4677 10. MIME decoding is now applied to the contents of Subject: header lines when
4680 11. Now that a reference to $sender_host_address automatically causes a reverse
4681 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4682 host lookup before query-style lookups in lists that might use this
4683 variable. This has therefore been abolished, and the "net-" prefix is no
4684 longer necessary for query-style lookups.
4686 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4687 have been a typo for LFLAGS, so it has been changed.
4689 13. The install script calls Exim with "-C /dev/null" in order to find the
4690 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4691 to be output. Howeve, since Exim outputs its version number before the
4692 error, it didn't break the script. It just looked ugly. I fixed this by
4693 always allowing "-C /dev/null" if the caller is root.
4695 14. Ignore overlarge ACL variable number when reading spool file - insurance
4696 against a later release with more variables having written the file.
4698 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4699 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4700 this, as well as the form without the "IPv6" on the front.
4702 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4703 OS/Makefile-Darwin file.
4705 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4706 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4708 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4709 variable. However, some OS use ints for inodes. I've added cast to long int
4710 to get rid of the compiler warning.
4712 19. I had forgotten to lock out "/../" in configuration file names when
4713 ALT_CONFIG_PREFIX was set.
4715 20. Routers used for verification do not need to specify transports. However,
4716 if such a router generated a host list, and callout was configured, Exim
4717 crashed, because it could not find a port number from the (non-existent)
4718 transport. It now assumes port 25 in this circumstance.
4720 21. Added the -t option to exigrep.
4722 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4723 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4724 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4725 them is set, LOOKUP_LSEARCH is forced.
4727 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4729 24. Added sender and host information to the "rejected by local_scan()" log
4730 line; previously there was no indication of these.
4732 25. Added .include_if_exists.
4734 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4735 Linux. It turns out that not all file systems support this. Apparently some
4736 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4737 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4738 not supported on the file descriptor, is now ignored when Exim is trying to
4739 sync a directory. This applies only to Linux.
4741 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4743 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4744 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4747 29. Added support for maildirsize files from supplied patch (modified a bit).
4749 30. The use of :fail: followed by an empty string could lead Exim to respond to
4750 sender verification failures with (e.g.):
4752 550 Verification failed for <xxx>
4753 550 Sender verify failed
4755 where the first response line was missing the '-' that indicates it is not
4756 the final line of the response.
4758 31. The loop for finding the name of the user that called Exim had a hardwired
4759 limit of 10; it now uses the value of finduser_retries, which is used for
4760 all other user lookups.
4762 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4765 33. Exim was neglecting to zero errno before one call of strtol() when
4766 expanding a string and expecting an integer value. On some systems this
4767 resulted in spurious "integer overflow" errors. Also, it was casting the
4768 result into an int without checking.
4770 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4771 did not work. The code looks as if it has *never* worked, though it appears
4772 to have been documented since at least releast 1.62. I have made it work.
4774 35. The "timeout_DNS" error in retry rules, also documented since at least
4775 1.62, also never worked. As it isn't clear exactly what this means, and
4776 clearly it isn't a major issue, I have abolished the feature by treating it
4777 as "timeout", and writing a warning to the main and panic logs.
4779 36. The display of retry rules for -brt wasn't always showing the error code
4782 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4783 timeout_connect_A, timeout_connect_MX.
4785 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4786 to the empty sender.
4788 39. The daemon was not analysing the content of -oX till after it had closed
4789 stderr and disconnected from the controlling terminal. This meant that any
4790 syntax errors were only noted on the panic log, and the return code from
4791 the command was 0. By re-arranging the code a little, I've made the
4792 decoding happen first, so such errors now appear on stderr, and the return
4793 code is 1. However, the actual setting up of the sockets still happens in
4794 the disconnected process, so errors there are still only recorded on the
4797 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4798 connections (as happens on some IP stacks) was logged at start up time as
4799 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4800 it from "IPv6 and IPv4", which means that two separate sockets are being
4803 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4804 says whether AF_INET or AF_INET6 was passed as an argument.
4806 42. Exiwhat output was messed up when time zones were included in log
4809 43. Exiwhat now gives more information about the daemon's listening ports,
4810 and whether -tls-on-connect was used.
4812 44. The "port" option of the smtp transport is now expanded.
4814 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4815 silently ignored. Now an error message is written to the main and panic
4818 46. There's a new ACL modifier called "logwrite" which writes to a log file
4819 as soon as it is encountered.
4821 47. Added $local_user_uid and $local_user_gid at routing time.
4823 48. Exim crashed when trying to verify a sender address that was being
4826 49. Exim was recognizing only a space character after ".include". It now also
4827 recognizes a tab character.
4829 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4830 extracting the relevant information from the specification. The man page no
4831 longer contains scrambled data for the -d option, and I've added a section
4832 at the front about calling Exim under different names.
4834 51. Added "extra_headers" argument to the "mail" command in filter files.
4836 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4839 53. Installed eximstats 1.29.
4841 54. Added transport_filter_timeout as a generic transport option.
4843 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4844 Cc: header lines. This was required by RFC 822, but it not required by RFC
4847 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4848 incoming messages that did not have them. Now it does so only if the
4849 message originates locally, that is, if there is no associated remote host
4850 address. When Resent- header lines are present, this applies to the Resent-
4851 lines rather than the non-Resent- lines.
4853 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4854 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4856 58. Messages for configuration errors now include the name of the main
4857 configuration file - useful now that there may be more than one file in a
4858 list (.included file names were always shown).
4860 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4861 for those rare installations that do not start the daemon as root or run it
4862 setuid root. I've cut out the call to initgroups() if the daemon is not
4865 60. The Exim user and group can now be bound into the binary as text strings
4866 that are looked up at the start of Exim's processing.
4868 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4870 62. Added $mailstore_basename variable.
4872 63. Installed patch to sieve.c from Michael Haardt.
4874 64. When Exim failed to open the panic log after failing to open the main log,
4875 the original message it was trying to log was written to stderr and debug
4876 output, but if they were not available (the usual case in production), it
4877 was lost. Now it is written to syslog before the two lines that record the
4878 failures to open the logs.
4880 65. Users' Exim filters run in subprocesses under the user's uid. It is
4881 possible for a "deliver" command or an alias in a "personal" command to
4882 provoke an address rewrite. If logging of address rewriting is configured,
4883 this fails because the process is not running as root or exim. There may be
4884 a better way of dealing with this, but for the moment (because 4.30 needs
4885 to be released), I have disabled address rewrite logging when running a
4886 filter in a non-root, non-exim process.
4892 1. The buildconfig auxiliary program wasn't quoting the value set for
4893 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4894 not defined. This bug was masked in 4.22 by the effect that was fixed in
4897 2. Some messages that were rejected after a message id was allocated were
4898 shown as "incomplete" by exigrep. It no longer does this for messages that
4899 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4901 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4902 have allow_domain_literals set, the ID did not get logged in the <= line.
4903 Domain literals are now always recognized in Message-ID: header lines.
4905 4. The first argument for a ${extract expansion item is the key name or field
4906 number. Leading and trailing spaces in this item were not being ignored,
4907 causing some misleading effects.
4909 5. When deliver_drop_privilege was set, single queue runner processes started
4910 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4911 same command in the process it spins off) were not dropping privilege.
4913 6. When the daemon running as "exim" started a queue runner, it always
4914 re-executed Exim in the spun-off process. This is a waste of effort when
4915 deliver_drop_privilege is set. The new process now just calls the
4916 queue-runner function directly.
4922 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4925 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4926 ignored. Though the use of -oP was forcing the writing of a pid file, it
4927 was always written to the default place.
4929 3. If the message "no IP address found for host xxxx" is generated during
4930 incoming verification, it is now followed by identification of the incoming
4931 connection (so you can more easily find what provoked it).
4933 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4935 5. Added some features to "harden" Exim a bit more against certain attacks:
4937 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4938 be put in Local/Makefile. This is like the never_users runtime option,
4939 but it cannot be overridden. The default setting is "root".
4941 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4942 prefix string with which any file named in a -C command line option
4945 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4946 is retained for -C and -D only if the caller of Exim is root. Without
4947 it, the exim user may also use -C and -D and retain privilege.
4949 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4950 command line option is disabled.
4952 6. Macro names set by the -D option must start with an upper case letter, just
4953 like macro names defined in the configuration file.
4955 7. Added "dereference=" facility to LDAP.
4957 8. Two instances of the typo "uknown" in the source files are fixed.
4959 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4960 the Configure-Makefile script screwed up while processing it.
4962 10. Incorporated PCRE 4.4.
4964 11. The SMTP synchronization check was not operating right at the start of an
4965 SMTP session. For example, it could not catch a HELO sent before the client
4966 waited for the greeting. There is now a check for outstanding input at the
4967 point when the greeting is written. Because of the duplex, asynchronous
4968 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4969 way, but not yet received, when the check is performed.
4971 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4972 on TCP/IP sockets, because this apparently causes some broken clients to
4975 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4976 unchanged) from the Cygwin maintainer.
4978 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4979 was supported instead of testing for mbx. Effectively a typo.
4981 15. The spa authenticator server code was not checking that the input it
4982 received was valid base64.
4984 16. The debug output line for the "set" modifier in ACLs was not showing the
4985 name of the variable that was being set.
4987 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4989 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4990 lookup on its own. Something else was needed to trigger the lookup. For
4991 example, a match in host_lookup or the need for a host name in a host list.
4992 Now, if $sender_host_name is referenced and the host name has not yet been
4993 looked up, a lookup is performed. If the lookup fails, the variable remains
4994 empty, and $host_lookup_failed is set to "1".
4996 19. Added "eqi" as a case-independent comparison operator.
4998 20. The saslauthd authentication condition could segfault if neither service
4999 nor realm was specified.
5001 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5002 error message that was logged was misleading, and incoming SMTP
5003 connections were dropped. The message is now more accurate, and temporary
5004 errors are given to SMTP connections.
5006 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5007 (except RSET) with a 421 error, until QUIT is received. However, it was
5008 failing to send a response to QUIT.
5010 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5011 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5012 ACL is now run after the helo_try_verify_hosts code.
5014 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5015 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5016 case-independent, so other case variants are also recognized). Apparently
5017 some systems use these upper case variants.
5019 25. If more than two messages were waiting for the same host, and a transport
5020 filter was specified for the transport, Exim sent two messages over the
5021 same TCP/IP connection, and then failed with "socket operation on non-
5022 socket" when it tried to send the third.
5024 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5026 27. The extern definition of crypt16() in expand.c was not being excluded when
5027 the OS had its own crypt16() function.
5029 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5030 as a preferred synonym for return_size_limit, both as an option and as an
5033 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5035 30. Changed the default configuration ACL to relax the local part checking rule
5036 for addresses that are not in any local domains. For these addresses,
5037 slashes and pipe symbols are allowed within local parts, but the sequence
5038 /../ is explicitly forbidden.
5040 31. SPA server authentication was not clearing the challenge buffer before
5043 32. log_message in a "warn" ACL statement was writing to the reject log as
5044 well as to the main log, which contradicts the documentation and doesn't
5045 seem right (because no rejection is happening). So I have stopped it.
5047 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5048 However, I am unable to do any testing of this.
5050 34. Fixed an infelicity in the appendfile transport. When checking directories
5051 for a mailbox, to see if any needed to be created, it was accidentally
5052 using path names with one or more superfluous leading slashes; tracing
5053 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5055 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5056 contents are added to the log line that is written for every discarded
5057 recipient. (Previously a log_message setting was ignored.)
5059 36. The ${quote: operator now quotes the string if it is empty.
5061 37. The install script runs exim in order to find its version number. If for
5062 some reason other than non-existence or emptiness, which it checks, it
5063 could not run './exim', it was installing it with an empty version number,
5064 i.e. as "exim-". This error state is now caught, and the installation is
5067 38. An argument was missing from the function that creates an error message
5068 when Exim fails to connect to the socket for saslauthd authentication.
5069 This could cause Exim to crash, or give a corrupted message.
5071 39. Added isip, isip4, and isip6 to ${if conditions.
5073 40. The ACL variables $acl_xx are now saved with the message, and can be
5074 accessed later in routers, transports, and filters.
5076 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5077 strings in the file are not string-expanded.
5079 42. If a MAIL command specified a SIZE value that was too large to fit into an
5080 int variable, the check against message_size_limit failed. Such values are
5081 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5082 day this will have to be increased, but I don't think I want to be around
5083 when emails are that large.
5090 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5091 iconv() is not standard in FreeBSD.
5093 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5094 IPv6 enabled. The observed symptom was a segmentation fault on return from
5095 the function os_common_find_running_interfaces() in src/os.c.
5097 3. In the check_special_case() function in daemon.c I had used "errno" as an
5098 argument name, which causes warnings on some systems. This was basically a
5099 typo, since it was named "eno" in the comments!
5101 4. The code that waits for the clock to tick (at a resolution of some fraction
5102 of a second) so as to ensure message-id uniqueness was always waiting for
5103 at least one whole tick, when it could have waited for less. [This is
5104 almost certainly not relevant at current processor speeds, where it is
5105 unlikely to ever wait at all. But we try to future-proof.]
5107 5. The function that sleeps for a time interval that includes fractions of a
5108 second contained a race. It did not block SIGALRM between setting the
5109 timer, and suspending (a couple of lines later). If the interval was short
5110 and the sigsuspend() was delayed until after it had expired, the suspension
5111 never ended. On busy systems this could lead to processes getting stuck for
5114 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5115 process, before it forks any delivery processes. The open lookup caching
5116 mechanism meant that the open file or database connection was passed into
5117 the delivery process. The problem was that delivery processes always tidy
5118 up cached lookup data. This could cause a problem for the next delivery
5119 process started by the queue runner, because the external queue runner
5120 process does not know about the closure. So the next delivery process
5121 still has data in the lookup cache. In the case of a file lookup, there was
5122 no problem because closing a file descriptor in a subprocess doesn't affect
5123 the parent. However, if the lookup was caching a connection to a database,
5124 the connection was closed, and the second delivery process was likely to
5125 see errors such as "PGSQL: query failed: server closed the connection
5126 unexpectedly". The problem has been fixed by closing all cached lookups
5127 in a queue runner before running a delivery process.
5129 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5130 seem to have the "const" qualifier which it has on other OS. I've
5133 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5134 *of the same type* (client or server) with the same public name that an
5135 error should be diagnosed.
5137 9. When Exim looked up a host name for an IP address, but failed to find the
5138 original IP address when looking up the host name (a safety check), it
5139 output the message "<ip address> does not match any IP for NULL", which was
5140 confusing, to say the least. The bug was that the host name should have
5141 appeared instead of "NULL".
5143 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5144 user that is built into the binary, and the -C or -D options is used, root
5145 privilege is dropped before the configuration file is read. In addition,
5146 logging is switched to stderr instead of the normal log files. If the
5147 configuration then re-defines the Exim user, the unprivileged environment
5148 is probably not what is expected, so Exim logs a panic warning message (but
5151 However, if deliver_drop_privilege is set, the unprivileged state may well
5152 be exactly what is intended, so the warning has been cut out in that case,
5153 and Exim is allowed to try to write to its normal log files.
5159 1. smtp_return_error_details was not giving details for temporary sender
5160 or receiver verification errors.
5162 2. Diagnose a configuration error if two authenticators have the same public
5165 3. Exim used not to create the message log file for a message until the first
5166 delivery attempt. This could be confusing when incoming messages were held
5167 for policy or load reasons. The message log file is now created at the time
5168 the message is received, and an initial "Received" line is written to it.
5170 4. The automatically generated man page for command line options had a minor
5171 bug that caused no ill effects; however, a more serious problem was that
5172 the procedure for building the man page automatically didn't always
5173 operate. Consequently, release 4.20 contains an out-of-date version. This
5174 shouldn't happen again.
5176 5. When building Exim with embedded Perl support, the script that builds the
5177 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5178 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5180 6. The freeze_tell option was not being used for messages that were frozen on
5181 arrival, either by an ACL or by local_scan().
5183 7. Added the smtp_incomplete_transaction log selector.
5185 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5186 was accepting AUTH without a new EHLO.
5188 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5189 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5192 10. Logging of TCP/IP connections (when configured) now happens in the main
5193 daemon process instead of the child process, so that the TCP/IP connection
5194 count is more accurate (but it can never be perfect).
5196 11. The use of "drop" in a nested ACL was not being handled correctly in the
5197 outer ACL. Now, if condition failure induced by the nested "drop" causes
5198 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5199 or "require"), the connection is dropped.
5201 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5202 that yield "discard" can now be used with an "accept" or a "discard" verb,
5203 but an error is generated for any others (because I can't see a useful way
5204 to define what should happen).
5206 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5207 are now processed in the same way as lines in the Exim configuration file.
5208 In particular, continuation lines are supported.
5210 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5212 15. Added -ti meaning -t -i.
5214 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5215 domains, and warn by logging if others are found.
5217 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5218 returned from GIFCONF when Exim is trying to find the list of interfaces on
5219 a host. The code in os.c has been modified to copy each ifreq to an aligned
5220 structure in all cases.
5222 Also, in some cases, the returned ifreq's were being copied to a 'struct
5223 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5224 means the last couple of bytes of an IPv6 address could be chopped if the
5225 ifreq contained only a normal sockaddr (14 bytes storage).
5227 18. Named domain lists were not supported in the hosts_treat_as_local option.
5228 An entry such as +xxxx was not recognized, and was treated as a literal
5231 19. Ensure that header lines added by a DATA ACL are included in the reject log
5232 if the ACL subsequently rejects the message.
5234 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5235 MD5 (which is deprecated).
5237 21. When testing a filter file using -bf, Exim was writing a message when it
5238 took the sender from a "From " line in the message, but it was not doing so
5239 when it took $return_path from a Return-Path: header line. It now does.
5241 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5242 with a valid header line field name (a series of printing characters
5243 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5245 23. Changed "disc" in the source to "disk" to conform to the documentation and
5246 the book and for uniformity.
5248 24. Ignore Sendmail's -Ooption=value command line item.
5250 25. When execve() failed while trying to run a command in a pipe transport,
5251 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5252 could be confused with a return value of 69 from the command itself. This
5253 has been changed to 127, the value the shell returns if it is asked to run
5254 a non-existent command. The wording for the related log line suggests a
5255 non-existent command as the problem.
5257 26. If received_header_text expands to an empty string, do not add a Received:
5258 header line to the message. (Well, it adds a token one on the spool, but
5259 marks it "old" so that it doesn't get used or transmitted.)
5261 27. Installed eximstats 1.28 (addition of -nt option).
5263 28. There was no check for failure on the call to getsockname() in the daemon
5264 code. This can fail if there is a shortage of resources on the system, with
5265 ENOMEM, for example. A temporary error is now given on failure.
5267 29. Contrary to the C standard, it seems that in some environments, the
5268 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5269 program. Exim now does this explicitly; it affects the formatting of
5270 timestamps using strftime().
5272 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5273 complaints. I've now initialized all the variables, to avoid this.
5275 32. Header lines added by a system filter were not being "seen" during
5276 transport-time rewrites.
5278 33. The info_callback() function passed to OpenSSL is set up with type void
5279 (*)(SSL *, int, int), as described somewhere. However, when calling the
5280 function (actually a macro) that sets it up, the type void(*)() is
5281 expected. I've put in a cast to prevent warnings from picky compilers.
5283 34. If a DNS black list lookup found a CNAME record, but there were no A
5284 records associated with the domain it pointed at, Exim crashed.
5286 35. If a DNS black list lookup returned more than one A record, Exim ignored
5287 all but the first. It now scans all returned addresses if a particular IP
5288 value is being sought. In this situation, the contents of the
5289 $dnslist_value variable are a list of all the addresses, separated by a
5292 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5293 to accept a host name and all its aliases if the forward lookup for any of
5294 them yielded the IP address of the incoming connection. Now it accepts only
5295 those names whose forward lookup yields the correct IP address. Any other
5296 names are discarded. This closes a loophole whereby a rogue DNS
5297 administrator could create reverse DNS records to break through a
5298 wildcarded host restriction in an ACL.
5300 37. If a user filter or a system filter that ran in a subprocess used any of
5301 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5302 the wrong values were passed to the pipe command ($thisaddress had the
5303 value of $0, $0 had the value of $1, etc). This bug was introduced by
5304 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5306 38. Improved the line breaking for long SMTP error messages from ACLs.
5307 Previously, if there was no break point between 40 and 75 characters, Exim
5308 left the rest of the message alone. Two changes have been made: (a) I've
5309 reduced the minimum length to 35 characters; (b) if it can't find a break
5310 point between 35 and 75 characters, it looks ahead and uses the first one
5311 that it finds. This may give the occasional overlong line, but at least the
5312 remaining text gets split now.
5314 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5315 file descriptors might be low, and that setting 1000 would always raise it.
5316 It turns out that in some environments, the limit is already over 1000 and
5317 that lowering it causes trouble. So now Exim takes care not to decrease it.
5319 40. When delivering a message, the value of $return_path is set to $sender_
5320 address at the start of routing (routers may change the value). By an
5321 oversight, this default was not being set up when an address was tested by
5322 -bt or -bv, which affected the outcome if any router or filter referred to
5325 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5326 log only when "message" or "log_message" are set. However, if one of the
5327 conditions was an address verification, or a call to a nested ACL, the
5328 messages generated by the underlying test were being passed through. This
5329 no longer happens. The underlying message is available in $acl_verify_
5330 message for both "message" and "log_message" expansions, so it can be
5331 passed through if needed.
5333 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5334 new expansion $bh_ to give the encoded byte string without charset
5335 translation. Translation happens only if iconv() is available; HAVE_ICONV
5336 indicates this at build time. HEADERS_CHARSET gives the charset to
5337 translate to; headers_charset can change it in the configuration, and
5338 "headers charset" can change it in an individual filter file.
5340 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5341 that creates RFC 2047 encoded "words" labels them as that charset instead
5342 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5343 expansion operator; (ii) when Exim creates a From: line for a local
5344 message; (iii) when a header line is rewritten to include a "phrase" part.
5346 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5347 buggy, causing it to skip the first lines of messages whose message ID
5348 ended in 'D'. This would not have bitten before Exim release 4.14, because
5349 message IDs were unlikely to end in 'D' before then. The effect was to have
5350 incorrect size information for certain domains.
5352 45. #include "config.h" was missing at the start of the crypt16.c module. This
5353 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5356 46. If there was a timeout during a "random" callout check, Exim treated it as
5357 a failure of the random address, and carried on sending RSET and the real
5358 address. If the delay was just some slowness somewhere, the response to the
5359 original RCPT would be taken as a response to RSET and so on, causing
5360 mayhem of various kinds.
5362 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5363 when I implemented it. It didn't allow for the fact that some option values
5364 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5365 the right test for positive values.
5367 48. Domain names in DNS records are case-independent. Exim always looks them up
5368 in lower case. Some resolvers return domain names in exactly the case they
5369 appear in the zone file, that is, they may contain uppercase letters. Not
5370 all resolvers do this - some return always lower case. Exim was treating a
5371 change of case by a resolver as a change of domain, similar to a widening
5372 of a domain abbreviation. This triggered its re-routing code and so it was
5373 trying to route what was effectively the same domain again. This normally
5374 caused routing to fail (because the router wouldn't handle the domain
5375 twice). Now Exim checks for this case specially, and just changes the
5376 casing of the domain that it ultimately uses when it transmits the message
5379 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5382 50. If a filter generated a file delivery with a non-absolute name (possible if
5383 no home directory exists for the router), the forbid_file option was not
5386 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5387 the existing equality matching.
5389 52. Exim was using ints instead of ino_t variables in some places where it was
5390 dealing with inode numbers.
5392 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5393 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5394 called TMPDIR, and if it finds it is different, it changes its value.
5396 54. The smtp_printf() function is now made available to local_scan() so
5397 additional output lines can be written before returning. There is also an
5398 smtp_fflush() function to enable the detection of a dropped connection.
5399 The variables smtp_input and smtp_batched_input are exported to
5402 55. Changed the default runtime configuration: the message "Unknown user"
5403 has been removed from the ACL, and instead placed on the localuser router,
5404 using the cannot_route_message feature. This means that any verification
5405 failures that generate their own messages won't get overridden. Similarly,
5406 the "Unrouteable address" message that was in the ACL for unverifiable
5407 relay addresses has also been removed.
5409 56. Added hosts_avoid_esmtp to the smtp transport.
5411 57. The exicyclog script was not checking for the esoteric option
5412 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5413 will work only if exicyclog is run under the appropriate euid.
5415 58. Following a discussion on the list, the rules by which Exim recognises line
5416 endings on incoming messages have been changed. The -dropcr and drop_cr
5417 options are now no-ops, retained only for backwards compatibility. The
5418 following line terminators are recognized: LF CRLF CR. However, special
5419 processing applies to CR:
5421 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5422 nor a local message in the state where . is a terminator.
5424 (ii) If a bare CR is encountered in a header line, an extra space is added
5425 after the line terminator so as not to end the header. The reasoning
5426 behind this is that bare CRs in header lines are most likely either
5427 to be mistakes, or people trying to play silly games.
5429 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5430 was being incorrectly given as 18 bytes larger than it should have been.
5431 This is a VOB (very old bug).
5433 60. This may never have affected anything current, but just in case it has:
5434 When the local host is found other than at the start of a list of hosts,
5435 the local host, those with the same MX, and any that follow, are discarded.
5436 When the list in question was part of a longer list of hosts, the following
5437 hosts (not currently being processed) were also being discarded. This no
5438 longer happens. I'm not sure if this situation could ever has previously
5441 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5444 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5445 header. This is something that is recommended in a new Internet Draft, and
5446 is something that is documented as being done by Sendmail. There are two
5447 possible values. For messages generated by the autoreply transport, Exim
5450 Auto-Submitted: auto-replied
5452 whereas for all other generated messages (e.g. bounces) it adds
5454 Auto-Submitted: auto-generated
5456 63. The "personal" condition in filters now includes a test for the
5457 Auto-Submitted: header. If it contains the string "auto-" the message it
5458 not considered personal.
5460 64. Added rcpt_include_affixes as a generic transport option.
5462 65. Added queue_only_override (default true).
5464 66. Added the syslog_duplication option.
5466 67. If what should have been the first header line of a message consisted of
5467 a space followed by a colon, Exim was mis-interpreting it as a header line.
5468 It isn't of course - it is syntactically invalid and should therefore be
5469 treated as the start of the message body. The misbehaviour could have
5470 caused a number of strange effects, including loss of data in subsequent
5471 header lines, and spool format errors.
5473 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5474 client host had authenticated. This control can now be exercised by an ACL
5475 for more flexibility.
5477 69. By default, callouts do not happen when testing with -bh. There is now a
5478 variant, -bhc, which does actually run the callout code, including
5479 consulting and updating the callout cache.
5481 70. Added support for saslauthd authentication, courtesy of Alexander
5484 71. If statvfs() failed on the spool or log directories while checking their
5485 size for availability, Exim confusingly gave the error "space shortage".
5486 Furthermore, in debugging mode it crashed with a floating point exception.
5487 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5488 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5489 serious problem, Exim now writes to the main and panic logs when this
5490 happens, with details of the failure. It then refuses to accept the
5491 incoming message, giving the message "spool directory problem" or "log
5492 directory problem" with a 421 code for SMTP messages.
5494 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5495 0, 1, and 2 exist, because some OS complain for execs without them (see
5496 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5497 descriptors. However, the code omitted to check that the open succeeded,
5498 causing mysterious errors if for some reason the permissions on /dev/null
5499 got screwed. Now Exim writes a message to the main and panic logs, and
5500 bombs out if it can't open /dev/null.
5502 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5503 interact so that it is all more flexible. It is supposed to remain
5504 backwards compatible. Also added extra_local_interfaces.
5506 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5507 to bomb out with an assertion failure - to the client this appears as a
5508 connection drop. This problem occurs in the part of the code that was taken
5509 from the Samba project. Fortunately, the assertion is in a very simple
5510 function, so I have fixed this by reproducing the function inline in the
5511 one place where it is called, and arranging for authentication to fail
5512 instead of killing the process with assert().
5514 75. The SPA client code was not working when the server requested OEM rather
5515 than Unicode encoding.
5517 76. Added code to make require_files with a specific uid setting more usable in
5518 the case where statting the file as root fails - usually a non-root-mounted
5519 NFS file system. When this happens and the failure is EACCES, Exim now
5520 forks a subprocess and does the per-uid checking as the relevant uid.
5522 77. Added process_log_path.
5524 78. If log_file_path was not explicitly set, a setting of check_log_space or
5525 check_log_inodes was ignored.
5527 79. If a space check for the spool or log partitions fails, the incident is now
5528 logged. Of course, in the latter case the data may get lost...
5530 80. Added the %p formatting code to string_format() so that it can be used to
5531 print addresses in debug_print(). Adjusted all the address printing in the
5532 debugging in store.c to use %p rather than %d.
5534 81. There was a concern that a line of code in smtp_in.c could overflow a
5535 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5536 initially expressed, the concern was not well-founded, because trailing
5537 spaces are removed early. However, if the trailing spaces were followed by
5538 a NULL, they did not get removed, so the overflow was possible. Two fixes
5541 (a) I re-wrote the offending code in a cleaner fashion.
5542 (b) If an incoming SMTP command contains a NULL character, it is rejected
5545 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5546 runs initgroups(), so that if the Exim user is in any additional groups,
5547 they will be used during message reception.
5553 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob