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 not 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 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
70 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
72 Report and patch from Dmitry Banschikov.
74 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
75 Removed SSL_clear() after SSL_new() which led to protocol negotiation
76 failures. We appear to now support TLS1.1+ with Exim.
78 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
79 lets Exim select keys and certificates based upon TLS SNI from client.
80 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
81 before an outbound SMTP session. New log_selector, +tls_sni.
83 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
84 NULL dereference. Report and patch from Alun Jones.
86 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
87 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
88 Not seeing resolver debug output on NetBSD, but suspect this is a
89 resolver implementation change.
91 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
92 Left warnings. Added "eximon gdb" invocation mode.
94 PP/21 Defaulting "accept_8bitmime" to true, not false.
96 PP/22 Added -bw for inetd wait mode support.
98 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
99 locate the relevant includes and libraries. Made this the default.
101 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
102 Bugzilla 1246, report and most of solution from Tomasz Kusy.
104 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
105 This may cause build issues on older platforms.
107 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
108 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
109 gnutls_require_mac & gnutls_require_protocols (no longer supported).
110 Added SNI support via GnuTLS too.
111 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
113 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
115 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
117 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
123 PP/01 Solaris build fix for Oracle's LDAP libraries.
124 Bugzilla 1109, patch from Stephen Usher.
126 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
128 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
131 TF/02 Fix a couple more cases where we did not log the error message
132 when unlink() failed. See also change 4.74-TF/03.
134 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
135 lock up or crash if it happened to be inside a call to libc when it
136 got a SIGUSR1 from exiwhat.
138 The SIGUSR1 handler appends the current process status to the process
139 log which is later printed by exiwhat. It used to use the general
140 purpose logging code to do this, but several functions it calls are
141 not safe for signals.
143 The new output code in the SIGUSR1 handler is specific to the process
144 log, and simple enough that it's easy to inspect for signal safety.
145 Removing some special cases also simplifies the general logging code.
146 Removing the spurious timestamps from the process log simplifies
149 TF/04 Improved ratelimit ACL condition.
151 The /noupdate option has been deprecated in favour of /readonly which
152 has clearer semantics. The /leaky, /strict, and /readonly update modes
153 are mutually exclusive. The update mode is no longer included in the
154 database key; it just determines when the database is updated. (This
155 means that when you upgrde Exim will forget old rate measurements.)
157 Exim now checks that the per_* options are used with an update mode that
158 makes sense for the current ACL. For example, when Exim is processing a
159 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
160 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
161 must specify per_mail/readonly. If you omit the update mode it defaults to
162 /leaky where that makes sense (as before) or /readonly where required.
164 The /noupdate option is now undocumented but still supported for
165 backwards compatibility. It is equivalent to /readonly except that in
166 ACLs where /readonly is required you may specify /leaky/noupdate or
167 /strict/noupdate which are treated the same as /readonly.
169 A useful new feature is the /count= option. This is a generalization
170 of the per_byte option, so that you can measure the throughput of other
171 aggregate values. For example, the per_byte option is now equivalent
172 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
174 The per_rcpt option has been generalized using the /count= mechanism
175 (though it's more complicated than the per_byte equivalence). When it is
176 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
177 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
178 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
179 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
180 Note that using per_rcpt with a non-readonly update mode in more than
181 one ACL will cause the recipients to be double-counted. (The per_mail
182 and per_byte options don't have this problem.)
184 The handling of very low rates has changed slightly. If the computed rate
185 is less than the event's count (usually one) then this event is the first
186 after a long gap. In this case the rate is set to the same as this event's
187 count, so that the first message of a spam run is counted properly.
189 The major new feature is a mechanism for counting the rate of unique
190 events. The new per_addr option counts the number of different
191 recipients that someone has sent messages to in the last time period. It
192 behaves like per_rcpt if all the recipient addresses are different, but
193 duplicate recipient addresses do not increase the measured rate. Like
194 the /count= option this is a general mechanism, so the per_addr option
195 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
196 example, measure the rate that a client uses different sender addresses
197 with the options per_mail/unique=$sender_address. There are further
198 details in the main documentation.
200 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
202 TF/06 Removed a few PCRE remnants.
204 TF/07 Automatically extract Exim's version number from tags in the git
205 repository when doing development or release builds.
207 PP/02 Raise smtp_cmd_buffer_size to 16kB.
208 Bugzilla 879. Patch from Paul Fisher.
210 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
211 Heavily based on revision 40f9a89a from Simon Arlott's tree.
214 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
216 PP/05 Variable $av_failed, true if the AV scanner deferred.
217 Bugzilla 1078. Patch from John Horne.
219 PP/06 Stop make process more reliably on build failure.
220 Bugzilla 1087. Patch from Heiko Schlittermann.
222 PP/07 Make maildir_use_size_file an _expandable_ boolean.
223 Bugzilla 1089. Patch from Heiko Schlittermann.
225 PP/08 Handle ${run} returning more data than OS pipe buffer size.
226 Bugzilla 1131. Patch from Holger Weiß.
228 PP/09 Handle IPv6 addresses with SPF.
229 Bugzilla 860. Patch from Wolfgang Breyha.
231 PP/10 GnuTLS: support TLS 1.2 & 1.1.
233 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
236 PP/11 match_* no longer expand right-hand-side by default.
237 New compile-time build option, EXPAND_LISTMATCH_RHS.
238 New expansion conditions, "inlist", "inlisti".
240 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
242 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
244 PP/14 fix log_write() format string regression from TF/03.
245 Bugzilla 1152. Patch from Dmitry Isaikin.
251 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
253 PP/02 Harmonised TLS library version reporting; only show if debugging.
254 Layout now matches that introduced for other libraries in 4.74 PP/03.
256 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
258 PP/04 New "dns_use_edns0" global option.
260 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
263 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
264 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
266 TK/01 Updated PolarSSL code to 0.14.2.
267 Bugzilla 1097. Patch from Andreas Metzler.
269 PP/07 Catch divide-by-zero in ${eval:...}.
272 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
275 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
276 format-string attack -- SECURITY: remote arbitrary code execution.
278 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
279 time unintentionally subject to list matching rules, letting the header
280 cause arbitrary Exim lookups (of items which can occur in lists, *not*
281 arbitrary string expansion). This allowed for information disclosure.
283 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
284 INT_MIN/-1 -- value coerced to INT_MAX.
290 NM/01 Workround for PCRE version dependency in version reporting
293 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
294 This fixes portability to compilers other than gcc, notably
295 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
297 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
298 makefiles for portability to HP-UX and POSIX correctness.
300 PP/01 Permit LOOKUP_foo enabling on the make command-line.
301 Also via indented variable definition in the Makefile.
302 (Debugging by Oliver Heesakkers).
304 PP/02 Restore caching of spamd results with expanded spamd_address.
305 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
307 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
308 Improves build reliability. Fix from: Frank Elsner
310 NM/02 Fix wide character breakage in the rfc2047 coding
311 Fixes bug 1064. Patch from Andrey N. Oktyabrski
313 NM/03 Allow underscore in dnslist lookups
314 Fixes bug 1026. Patch from Graeme Fowler
316 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
317 Code patches from Adam Ciarcinski of NetBSD.
319 NM/04 Fixed exiqgrep to cope with mailq missing size issue
322 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
323 is logged, to avoid truncation. Patch from John Horne.
325 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
326 Patch from Jakob Hirsch.
328 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
329 SQL string expansion failure details.
330 Patch from Andrey Oktyabrski.
332 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
333 Patch from Simon Arlott.
335 PP/09 New lookups functionality failed to compile on old gcc which rejects
336 extern declarations in function scope.
337 Patch from Oliver Fleischmann
339 PP/10 Use sig_atomic_t for flags set from signal handlers.
340 Check getgroups() return and improve debugging.
341 Fixed developed for diagnosis in bug 927 (which turned out to be
344 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
345 Patch from Mark Zealey.
347 PP/12 Bugzilla 1056: Improved spamd server selection.
348 Patch from Mark Zealey.
350 PP/13 Bugzilla 1086: Deal with maildir quota file races.
351 Based on patch from Heiko Schlittermann.
353 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
354 Patch from Uwe Doering, sign-off by Michael Haardt.
356 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
357 variable declaration deep within a block. Bug and patch from
360 PP/15 lookups-Makefile IRIX compatibilty coercion.
362 PP/16 Make DISABLE_DKIM build knob functional.
364 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
365 Patch by Simon Arlott
367 TF/03 Fix valgrind.h portability to C89 compilers that do not support
368 variable argument macros. Our copy now differs from upstream.
374 TF/01 Failure to get a lock on a hints database can have serious
375 consequences so log it to the panic log.
377 TF/02 Log LMTP confirmation messages in the same way as SMTP,
378 controlled using the smtp_confirmation log selector.
380 TF/03 Include the error message when we fail to unlink a spool file.
382 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
383 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
384 for maintaining out-of-tree patches for some time.
386 PP/01 Bugzilla 139: Documentation and portability issues.
387 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
388 Handle per-OS dynamic-module compilation flags.
390 PP/02 Let /dev/null have normal permissions.
391 The 4.73 fixes were a little too stringent and complained about the
392 permissions on /dev/null. Exempt it from some checks.
393 Reported by Andreas M. Kirchwitz.
395 PP/03 Report version information for many libraries, including
396 Exim version information for dynamically loaded libraries. Created
397 version.h, now support a version extension string for distributors
398 who patch heavily. Dynamic module ABI change.
400 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
401 privilege escalation vulnerability whereby the Exim run-time user
402 can cause root to append content of the attacker's choosing to
405 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
408 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
409 If dropping privileges for untrusted macros, we disabled normal logging
410 on the basis that it would fail; for the Exim run-time user, this is not
411 the case, and it resulted in successful deliveries going unlogged.
412 Fixed. Reported by Andreas Metzler.
418 PP/01 Date: & Message-Id: revert to normally being appended to a message,
419 only prepend for the Resent-* case. Fixes regression introduced in
420 Exim 4.70 by NM/22 for Bugzilla 607.
422 PP/02 Include check_rfc2047_length in configure.default because we're seeing
423 increasing numbers of administrators be bitten by this.
425 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
427 PP/03 Bugzilla 994: added openssl_options main configuration option.
429 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
431 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
433 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
435 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
436 without a peer certificate, leading to a segfault because of an
437 assumption that peers always have certificates. Be a little more
438 paranoid. Problem reported by Martin Tscholak.
440 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
441 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
442 NB: ClamAV planning to remove STREAM in "middle of 2010".
443 CL also introduces -bmalware, various -d+acl logging additions and
444 more caution in buffer sizes.
446 PP/09 Implemented reverse_ip expansion operator.
448 PP/10 Bugzilla 937: provide a "debug" ACL control.
450 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
452 PP/12 Bugzilla 973: Implement --version.
454 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
456 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
458 PP/15 Bugzilla 816: support multiple condition rules on Routers.
460 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
461 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
462 ignore trailing whitespace.
464 JJ/02 prevent non-panic DKIM error from being sent to paniclog
466 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
469 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
470 Notification from Dr Andrew Aitchison.
472 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
473 ExtendedDetectionInfo response format.
474 Notification from John Horne.
476 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
479 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
480 XSL and documented dependency on system catalogs, with examples of how
483 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
486 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
487 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
488 configuration file which is writeable by the Exim user or group.
490 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
491 of configuration files to cover files specified with the -C option if
492 they are going to be used with root privileges, not just the default
495 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
496 option (effectively making it always true).
498 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
499 files to be used while preserving root privileges.
501 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
502 that rogue child processes cannot use them.
504 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
505 run-time user, instead of root.
507 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
508 Exim run-time user without dropping privileges.
510 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
511 result string, instead of calling string_vformat() twice with the same
514 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
515 for other users. Others should always drop root privileges if they use
516 -C on the command line, even for a whitelisted configure file.
518 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
520 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
526 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
527 $data_path, and $header_path variables; fixed documentation bugs and
530 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
531 exipick to access non-standard spools, including the "frozen" queue
534 NM/01 Bugzilla 965: Support mysql stored procedures.
535 Patch from Alain Williams
537 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
539 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
540 Patch from Andreas Metzler
542 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
543 Patch from Kirill Miazine
545 NM/05 Bugzilla 671: Added umask to procmail example.
547 JJ/03 installed exipick 20100323.0, fixing doc bug
549 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
550 directory. Notification and patch from Dan Rosenberg.
552 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
554 TK/02 Improve log output when DKIM signing operation fails.
556 MH/01 Treat the transport option dkim_domain as a colon separated
557 list, not as a single string, and sign the message with each element,
558 omitting multiple occurences of the same signer.
560 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
561 Bugzilla 985, 986. Patch by Simon Arlott
563 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
564 Patch by Simon Arlott
566 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
567 MBX locking. Notification from Dan Rosenberg.
573 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
575 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
577 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
579 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
581 NM/04 Bugzilla 915: Flag broken perl installation during build.
587 TK/01 Added patch by Johannes Berg that expands the main option
588 "spamd_address" if it starts with a dollar sign.
590 TK/02 Write list of recipients to X-Envelope-Sender header when building
591 the mbox-format spool file for content scanning (suggested by Jakob
594 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
595 (http://www.dcc-servers.net/) support via dccifd. Activated by
596 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
598 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
599 by Mark Daniel Reidel <mr@df.eu>.
601 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
602 When building exim an external PCRE library is now needed -
603 PCRE is a system library on the majority of modern systems.
604 See entry on PCRE_LIBS in EDITME file.
606 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
607 conversation. Added nologin parameter to request.
608 Patch contributed by Kirill Miazine.
610 TF/01 Do not log submission mode rewrites if they do not change the address.
612 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
614 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
615 log files in place. Contributed by Roberto Lima.
617 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
619 TF/03 Bugzilla 615: When checking the local_parts router precondition
620 after a local_part_suffix or local_part_prefix option, Exim now
621 does not use the address's named list lookup cache, since this
622 contains cached lookups for the whole local part.
624 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
625 Robert Millan. Documentation is in experimental-spec.txt.
627 TF/04 Bugzilla 668: Fix parallel build (make -j).
629 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
631 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
632 Patch provided by Jan Srzednicki.
634 TF/05 Leading white space used to be stripped from $spam_report which
635 wrecked the formatting. Now it is preserved.
637 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
638 that they are available at delivery time.
640 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
642 TF/08 TLS error reporting now respects the incoming_interface and
643 incoming_port log selectors.
645 TF/09 Produce a more useful error message if an SMTP transport's hosts
646 setting expands to an empty string.
648 NM/06 Bugzilla 744: EXPN did not work under TLS.
649 Patch provided by Phil Pennock.
651 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
652 Patch provided by Richard Godbee.
654 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
655 acl_smtp_notquit, added index entry.
657 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
658 Patch provided by Eugene Bujak.
660 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
661 accept(). Patch provided by Maxim Dounin.
663 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
664 Patch provided by Phil Pennock.
666 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
668 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
669 Patch provided by Brad "anomie" Jorsch.
671 NM/14 Bugzilla 622: Added timeout setting to transport filter.
672 Patch provided by Dean Brooks.
674 TK/05 Add native DKIM support (does not depend on external libraries).
676 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
677 Patch provided by Graeme Fowler.
679 NM/16 Bugzilla 851: Documentation example syntax fix.
681 NM/17 Changed NOTICE file to remove references to embedded PCRE.
683 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
686 NM/19 Bugzilla 745: TLS version reporting.
687 Patch provided by Phil Pennock.
689 NM/20 Bugzilla 167: bool: condition support.
690 Patch provided by Phil Pennock.
692 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
693 clients. Patch provided by Phil Pennock.
695 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
696 Patch provided by Brad "anomie" Jorsch.
698 NM/23 Bugzilla 687: Fix misparses in eximstats.
699 Patch provided by Heiko Schlittermann.
701 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
702 Patch provided by Heiko Schlittermann.
704 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
705 plus update to original patch.
707 NM/26 Bugzilla 799: Documentation correction for ratelimit.
709 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
710 Patch provided by David Brownlee.
712 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
714 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
716 NM/30 Bugzilla 888: TLS documentation bugfixes.
718 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
720 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
721 Unlike the original bugzilla I have changed all shell scripts in src tree.
723 NM/33 Bugzilla 898: Transport filter timeout fix.
724 Patch by Todd Rinaldo.
726 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
727 Patch by Serge Demonchaux.
729 NM/35 Bugzilla 39: Base64 decode bug fixes.
730 Patch by Jakob Hirsch.
732 NM/36 Bugzilla 909: Correct connect() call in dcc code.
734 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
736 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
738 NM/39 Bugzilla 911: Fixed MakeLinks build script.
744 TK/01 Add preliminary DKIM support. Currently requires a forked version of
745 ALT-N's libdkim that I have put here:
746 http://duncanthrax.net/exim-experimental/
748 Note to Michael Haardt: I had to rename some vars in sieve.c. They
749 were called 'true' and it seems that C99 defines that as a reserved
750 keyword to be used with 'bool' variable types. That means you could
751 not include C99-style headers which use bools without triggering
752 build errors in sieve.c.
754 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
755 as mailq or other aliases. Changed the --help handling significantly
756 to do whats expected. exim_usage() emits usage/help information.
758 SC/01 Added the -bylocaldomain option to eximstats.
760 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
762 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
764 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
770 PH/01 Another patch from the Sieve maintainer.
772 PH/02 When an IPv6 address is converted to a string for single-key lookup
773 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
774 dots are used instead of colons so that keys in lsearch files need not
775 contain colons. This was done some time before quoting was made available
776 in lsearch files. However, iplsearch files do require colons in IPv6 keys
777 (notated using the quote facility) so as to distinguish them from IPv4
778 keys. This meant that lookups for IP addresses in host lists did not work
779 for iplsearch lookups.
781 This has been fixed by arranging for IPv6 addresses to be expressed with
782 colons if the lookup type is iplsearch. This is not incompatible, because
783 previously such lookups could never work.
785 The situation is now rather anomolous, since one *can* have colons in
786 ordinary lsearch keys. However, making the change in all cases is
787 incompatible and would probably break a number of configurations.
789 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
792 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
793 conversion specification without a maximum field width, thereby enabling
794 a rogue spamd server to cause a buffer overflow. While nobody in their
795 right mind would setup Exim to query an untrusted spamd server, an
796 attacker that gains access to a server running spamd could potentially
797 exploit this vulnerability to run arbitrary code as the Exim user.
799 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
800 $primary_hostname instead of what libspf2 thinks the hosts name is.
802 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
803 a directory entry by the name of the lookup key. Previously, if a
804 symlink pointed to a non-existing file or a file in a directory that
805 Exim lacked permissions to read, a lookup for a key matching that
806 symlink would fail. Now it is enough that a matching directory entry
807 exists, symlink or not. (Bugzilla 503.)
809 PH/03 The body_linecount and body_zerocount variables are now exported in the
812 PH/04 Added the $dnslist_matched variable.
814 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
815 This means they are set thereafter only if the connection becomes
818 PH/06 Added the client_condition to authenticators so that some can be skipped
819 by clients under certain conditions.
821 PH/07 The error message for a badly-placed control=no_multiline_responses left
822 "_responses" off the end of the name.
824 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
826 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
827 (without spaces) instead of just copying the configuration text.
829 PH/10 Added the /noupdate option to the ratelimit ACL condition.
831 PH/11 Added $max_received_linelength.
833 PH/12 Added +ignore_defer and +include_defer to host lists.
835 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
836 way in which PCRE > 7.0 is built.
838 PH/14 Implemented queue_only_load_latch.
840 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
841 MAIL command. The effect was to mangle the value on 64-bit systems.
843 PH/16 Another patch from the Sieve maintainer.
845 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
847 PH/18 If a system quota error occurred while trying to create the file for
848 a maildir delivery, the message "Mailbox is full" was not appended to the
849 bounce if the delivery eventually timed out. Change 4.67/27 below applied
850 only to a quota excession during the actual writing of the file.
852 PH/19 It seems that peer DN values may contain newlines (and other non-printing
853 characters?) which causes problems in log lines. The DN values are now
854 passed through string_printing() before being added to log lines.
856 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
857 and InterBase are left for another time.)
859 PH/21 Added message_body_newlines option.
861 PH/22 Guard against possible overflow in moan_check_errorcopy().
863 PH/23 POSIX allows open() to be a macro; guard against that.
865 PH/24 If the recipient of an error message contained an @ in the local part
866 (suitably quoted, of course), incorrect values were put in $domain and
867 $local_part during the evaluation of errors_copy.
873 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
874 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
877 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
878 issue a MAIL command.
880 PH/02 In an ACL statement such as
882 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
884 if a client was not listed at all, or was listed with a value other than
885 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
886 the condition was not true (as it should be), so access was not denied.
887 The bug was that the ! inversion was incorrectly passed on to the second
888 item. This has been fixed.
890 PH/03 Added additional dnslists conditions == and =& which are different from
891 = and & when the dns lookup returns more than one IP address.
893 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
894 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
896 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
897 FSYNC, which compiles an option called disable_fsync that allows for
898 bypassing fsync(). The documentation is heavily laced with warnings.
900 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
902 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
903 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
904 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
905 including adding "make clean"; (3) Added -fPIC when compiling the test
906 dynamically loaded module, to get rid of a warning.
908 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
909 message fails, move_frozen_messages = true and ignore_bounce_errors_after
910 = 0s. The bug is otherwise harmless.
912 PH/07 There was a bug in the dovecot authenticator such that the value of
913 $auth1 could be overwritten, and so not correctly preserved, after a
914 successful authentication. This usually meant that the value preserved by
915 the server_setid option was incorrect.
917 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
919 PH/09 Installed PCRE release 7.0.
921 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
922 run for batched SMTP input. It is now run at the start of every message
923 in the batch. While fixing this I discovered that the process information
924 (output by running exiwhat) was not always getting set for -bs and -bS
925 input. This is fixed, and it now also says "batched" for BSMTP.
927 PH/11 Added control=no_pipelining.
929 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
930 patch, slightly modified), and move the expansion of helo_data till after
931 the connection is made in the smtp transport (so it can use these
934 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
936 PH/14 Added log_selector = +pid.
938 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
940 PH/16 Add ${if forany and ${if forall.
942 PH/17 Added dsn_from option to vary the From: line in DSNs.
944 PH/18 Flush SMTP output before performing a callout, unless control =
945 no_callout_flush is set.
947 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
948 was true (the default) a successful delivery failed to delete the retry
949 item, thus causing premature timeout of the address. The bug is now
952 PH/20 Added hosts_avoid_pipelining to the smtp transport.
954 PH/21 Long custom messages for fakedefer and fakereject are now split up
955 into multiline reponses in the same way that messages for "deny" and
956 other ACL rejections are.
958 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
959 with slight modification.
961 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
962 draft, changing the syntax and factoring some duplicate code".
964 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
965 for deliveries of the second and subsequent messages over the same SMTP
968 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
969 ${reduce, with only minor "tidies".
971 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
973 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
974 expansion side effects.
976 PH/27 When a message times out after an over-quota error from an Exim-imposed
977 quota, the bounce message says "mailbox is full". This message was not
978 being given when it was a system quota that was exceeded. It now should
981 MH/03 Made $recipients available in local_scan(). local_scan() already has
982 better access to the recipient list through recipients_list[], but
983 $recipients can be useful in postmaster-provided expansion strings.
985 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
986 in the case of a MAIL command with additional options following the
987 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
988 were accidentally chopped off.
990 PH/29 SMTP synchronization checks are implemented when a command is read -
991 there is a check that no more input is waiting when there shouldn't be
992 any. However, for some commands, a delay in an ACL can mean that it is
993 some time before the response is written. In this time, more input might
994 arrive, invalidly. So now there are extra checks after an ACL has run for
995 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
996 pipelining has not been advertised.
998 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1000 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1001 returned in the SMTP response when smtp_return_error_details was false.
1002 This has been fixed.
1004 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1005 instead of the C I/O that was originally supplied, because problems were
1006 reported on Solaris.
1008 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1009 Exim which did not show up earlier: it was assuming that a call to
1010 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1011 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1012 was a macro that became an assignment, so it seemed to work. This has
1013 changed to a proper function call with a void return, hence the compile
1014 error. Exim's code has been fixed.
1016 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1019 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1021 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1023 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1024 because it turns out to be too big or there is a timeout) there is no
1025 "Completed" line in the log. When some messages of this type were
1026 selected by exigrep, they were listed as "not completed". Others were
1027 picked up by some special patterns. I have improved the selection
1028 criteria to be more general.
1030 PH/38 The host_find_failed option in the manualroute router can now be set
1031 to "ignore", to completely ignore a host whose IP address cannot be
1032 found. If all hosts are ignored, the behaviour is controlled by the new
1033 host_all_ignored option.
1035 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1036 homing or because of multiple MX records with /mx) generated more than
1037 one IP address, and the following item turned out to be the local host,
1038 all the secondary addresses of the first item were incorrectly removed
1039 from the list, along with the local host and any following hosts (which
1040 is what is supposed to happen).
1042 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1043 whoever called Exim into the -H file. In the case of the daemon it was
1044 behaving confusingly. When first started, it used values for whoever
1045 started the daemon, but after a SIGHUP it used the Exim user (because it
1046 calls itself on a restart). I have changed the code so that it now always
1049 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1050 message are rejected with the same error (e.g. no authentication or bad
1051 sender address), and a DATA command is nevertheless sent (as can happen
1052 with PIPELINING or a stupid MUA), the error message that was given to the
1053 RCPT commands is included in the rejection of the DATA command. This is
1054 intended to be helpful for MUAs that show only the final error to their
1057 PH/42 Another patch from the Sieve maintainer.
1059 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1060 Eximstats - Fixed some broken HTML links and added missing column headers
1062 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1063 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1065 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1067 PH/43 Yet another patch from the Sieve maintainer.
1069 PH/44 I found a way to check for a TCP/IP connection going away before sending
1070 the response to the final '.' that terminates a message, but only in the
1071 case where the client has not sent further data following the '.'
1072 (unfortunately, this is allowed). However, in many cases there won't be
1073 any further data because there won't be any more messages to send. A call
1074 to select() can be used: if it shows that the input is "ready", there is
1075 either input waiting, or the socket has been closed. An attempt to read
1076 the next input character can distinguish the two cases. Previously, Exim
1077 would have sent an OK response which the client would never have see.
1078 This could lead to message repetition. This fix should cure that, at
1079 least in a lot of common cases.
1081 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1082 advertised in response to EHLO.
1088 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1089 fixed by 4.65/MH/01 (is this a record?) are fixed:
1091 (i) An empty string was always treated as zero by the numeric comparison
1092 operators. This behaviour has been restored.
1094 (ii) It is documented that the numeric comparison operators always treat
1095 their arguments as decimal numbers. This was broken in that numbers
1096 starting with 0 were being interpreted as octal.
1098 While fixing these problems I realized that there was another issue that
1099 hadn't been noticed. Values of message_size_limit (both the global option
1100 and the transport option) were treated as octal if they started with 0.
1101 The documentation was vague. These values are now always treated as
1102 decimal, and I will make that clear in the documentation.
1108 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1109 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1112 MH/01 Don't check that the operands of numeric comparison operators are
1113 integers when their expansion is in "skipping" mode (fixes bug
1114 introduced by 4.64-PH/07).
1116 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1117 child addresses, Exim now panics and dies. Previously, because the count
1118 is held in a short int, deliveries were likely to be lost. As such a
1119 large number of recipients for a single message is ridiculous
1120 (performance will be very, very poor), I have chosen to impose a limit
1121 rather than extend the field.
1127 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1128 leftover -K file (the existence of which was triggered by #402).
1129 While we were at it, introduced process PID as part of the -K
1130 filename. This should rule out race conditions when creating
1133 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1134 processing considerably. Previous code took too long for large mails,
1135 triggering a timeout which in turn triggers #401.
1137 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1138 in the DK code in transports.c. sendfile() is not really portable,
1139 hence the _LINUX specificness.
1141 TF/01 In the add_headers option to the mail command in an Exim filter,
1142 there was a bug that Exim would claim a syntax error in any
1143 header after the first one which had an odd number of characters
1146 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1147 callout verification, Exim cached a "reject" for the entire domain. This
1148 is correct for most verifications, but it is not correct for a recipient
1149 verification with use_sender or use_postmaster set, because in that case
1150 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1151 case of MAIL FROM:<> rejection from other early rejections (e.g.
1152 rejection of HELO). When verifying a recipient using a non-null MAIL
1153 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1154 Whatever the result of the callout, the value of the domain cache is
1155 left unchanged (for any other kind of callout, getting as far as trying
1156 RCPT means that the domain itself is ok).
1158 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1161 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1162 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1163 session, the daemon ignores ECONNECT errors and logs others; it now
1164 ignores EPIPE as well.
1166 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1167 (quoted-printable decoding).
1169 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1170 later the small subsequent patch to fix an introduced bug.
1172 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1174 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1176 PH/08 An error is now given if message_size_limit is specified negative.
1178 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1179 to be given (somewhat) arbitrary names.
1181 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1184 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1185 miscellaneous code fixes
1187 PH/10 Added the log_reject_target ACL modifier to specify where to log
1190 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1191 hostname. This is wrong, because it relates to the incoming message (and
1192 probably the interface on which it is arriving) and not to the outgoing
1193 callout (which could be using a different interface). This has been
1194 changed to use the value of the helo_data option from the smtp transport
1195 instead - this is what is used when a message is actually being sent. If
1196 there is no remote transport (possible with a router that sets up host
1197 addresses), $smtp_active_hostname is used.
1199 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1200 tweaks were necessary in order to get it to work (see also 21 below):
1201 (a) The code assumed that strncpy() returns a negative number on buffer
1202 overflow, which isn't the case. Replaced with Exim's string_format()
1204 (b) There were several signed/unsigned issues. I just did the minimum
1205 hacking in of casts. There is scope for a larger refactoring.
1206 (c) The code used strcasecmp() which is not a standard C function.
1207 Replaced with Exim's strcmpic() function.
1208 (d) The code set only $1; it now sets $auth1 as well.
1209 (e) A simple test gave the error "authentication client didn't specify
1210 service in request". It would seem that Dovecot has changed its
1211 interface. Fortunately there's a specification; I followed it and
1212 changed what the client sends and it appears to be working now.
1214 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1217 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1218 address A is aliased to B and C, where B exists and C does not. Without
1219 -v the output is "A verified" because verification stops after a
1220 successful redirection if more than one address is generated. However,
1221 with -v the child addresses are also verified. Exim was outputting "A
1222 failed to verify" and then showing the successful verification for C,
1223 with its parentage. It now outputs "B failed to verify", showing B's
1224 parentage before showing the successful verification of C.
1226 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1227 look up a TXT record in a specific list after matching in a combined
1230 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1231 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1232 they consult the DNS. I had assumed they would set it the way they
1233 wanted; and indeed my experiments on Linux seem to show that in some
1234 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1235 To be on the safe side, however, I have now made the interface to
1236 host_find_byname() similar to host_find_bydns(), with an argument
1237 containing the DNS resolver options. The host_find_byname() function now
1238 sets these options at its start, just as host_find_bydns() does. The smtp
1239 transport options dns_qualify_single and dns_search_parents are passed to
1240 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1241 of host_find_byname() use the default settings of RES_DEFNAMES
1242 (qualify_single) but not RES_DNSRCH (search_parents).
1244 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1245 spool_read_header() do less string testing, by means of a preliminary
1246 switch on the second character of optional "-foo" lines. (This is
1247 overdue, caused by the large number of possibilities that now exist.
1248 Originally there were few.) While I was there, I also converted the
1249 str(n)cmp tests so they don't re-test the leading "-" and the first
1250 character, in the hope this might squeeze out yet more improvement.
1252 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1253 flag allowing group syntax was set by the header_syntax check but not
1254 turned off, possible causing trouble later; (2) The flag was not being
1255 set at all for the header_verify test, causing "group"-style headers to
1256 be rejected. I have now set it in this case, and also caused header_
1257 verify to ignore an empty address taken from a group. While doing this, I
1258 came across some other cases where the code for allowing group syntax
1259 while scanning a header line wasn't quite right (mostly, not resetting
1260 the flag correctly in the right place). These bugs could have caused
1261 trouble for malformed header lines. I hope it is now all correct.
1263 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1264 with the "reply" argument non-NULL. The code, however (which originally
1265 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1266 but it didn't always do it. This confused somebody who was copying the
1267 code for some other use. I have removed all the tests.
1269 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1270 feature that was used to support insecure browsers during the U.S. crypto
1271 embargo. It requires special client support, and Exim is probably the
1272 only MTA that supported it -- and would never use it because real RSA is
1273 always available. This code has been removed, because it had the bad
1274 effect of slowing Exim down by computing (never used) parameters for the
1275 RSA_EXPORT functionality.
1277 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1278 authenticator to fail if there's a tab character in the incoming data
1279 (there should never be unless someone is messing about, as it's supposed
1280 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1281 if the connection is using TLS or if the remote IP is the same as the
1282 local IP, and the "valid-client-cert option" if a client certificate has
1285 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1286 authenticators. This can be used for authorization after authentication
1287 succeeds. (In the case of plaintext, it servers for both authentication
1290 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1291 if any retry times were supplied.
1293 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1294 connection, where there is no client IP address to check. In this
1295 situation, the verify now always succeeds.
1297 PH/25 Applied John Jetmore's -Mset patch.
1299 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1301 PH/27 In a string expansion for a processed (not raw) header when multiple
1302 headers of the same name were present, leading whitespace was being
1303 removed from all of them, but trailing whitespace was being removed only
1304 from the last one. Now trailing whitespace is removed from each header
1305 before concatenation. Completely empty headers in a concatenation (as
1306 before) are ignored.
1308 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1309 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1311 PH/29 [Removed. This was a change that I later backed out, and forgot to
1312 correct the ChangeLog entry (that I had efficiently created) before
1313 committing the later change.]
1315 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1316 address errors (4xx response to RCPT) over the same connection as other
1317 messages routed to the same hosts. Such deliveries are always "forced",
1318 so retry times are not inspected. This resulted in far too many retries
1319 for the affected addresses. The effect occurred only when there were more
1320 hosts than the hosts_max_try setting in the smtp transport when it had
1321 the 4xx errors. Those hosts that it had tried were not added to the list
1322 of hosts for which the message was waiting, so if all were tried, there
1323 was no problem. Two fixes have been applied:
1325 (i) If there are any address or message errors in an SMTP delivery, none
1326 of the hosts (tried or untried) are now added to the list of hosts
1327 for which the message is waiting, so the message should not be a
1328 candidate for sending over the same connection that was used for a
1329 successful delivery of some other message. This seems entirely
1330 reasonable: after all the message is NOT "waiting for some host".
1331 This is so "obvious" that I'm not sure why it wasn't done
1332 previously. Hope I haven't missed anything, but it can't do any
1333 harm, as the worst effect is to miss an optimization.
1335 (ii) If, despite (i), such a delivery is accidentally attempted, the
1336 routing retry time is respected, so at least it doesn't keep
1337 hammering the server.
1339 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1340 in ${readsocket because some servers need this prod.
1342 PH/32 Added some extra debug output when updating a wait-xxx database.
1344 PH/33 The hint "could be header name not terminated by colon", which has been
1345 given for certain expansion errors for a long time, was not being given
1346 for the ${if def:h_colon_omitted{... case.
1348 PH/34 The spec says: "With one important exception, whenever a domain list is
1349 being scanned, $domain contains the subject domain." There was at least
1350 one case where this was not true.
1352 PH/35 The error "getsockname() failed: connection reset by peer" was being
1353 written to the panic log as well as the main log, but it isn't really
1354 panic-worthy as it just means the connection died rather early on. I have
1355 removed the panic log writing for the ECONNRESET error when getsockname()
1358 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1359 runs only) independently of the message's sender address. This meant
1360 that, if the 4xx error was in fact related to the sender, a different
1361 message to the same recipient with a different sender could confuse
1362 things. In particualar, this can happen when sending to a greylisting
1363 server, but other circumstances could also provoke similar problems.
1364 I have changed the default so that the retry time for these errors is now
1365 based a combination of the sender and recipient addresses. This change
1366 can be overridden by setting address_retry_include_sender=false in the
1369 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1370 remote server are returned as part of bounce messages. This was not
1371 happening for LMTP over a pipe (the lmtp transport), but now it is the
1372 same for both kinds of LMTP.
1374 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1375 in header lines that were in fact CNAMEs. This is no longer the case.
1377 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1378 and queue runs started by the daemon processed all messages. This has
1379 been fixed so that -R and -S can now usefully be given with -q<time>.
1381 PH/40 Import PCRE release 6.7 (fixes some bugs).
1383 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1385 PH/42 Give an error if -q is specified more than once.
1387 PH/43 Renamed the variables $interface_address and $interface_port as
1388 $received_ip_address and $received_port, to make it clear that these
1389 values apply to message reception, and not to the outgoing interface when
1390 a message is delivered. (The old names remain recognized, of course.)
1392 PH/44 There was no timeout on the connect() call when using a Unix domain
1393 socket in the ${readsocket expansion. There now is.
1395 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1396 be meaningful with "accept".
1398 SC/01 Eximstats V1.43
1399 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1401 SC/02 Eximstats V1.44
1402 Use a glob alias rather than an array ref in the generated
1403 parser. This improves both readability and performance.
1405 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1406 Collect SpamAssassin and rejection statistics.
1407 Don't display local sender or destination tables unless
1408 there is data to show.
1409 Added average volumes into the top table text output.
1411 SC/04 Eximstats V1.46
1412 Collect data on the number of addresses (recipients)
1413 as well as the number of messages.
1415 SC/05 Eximstats V1.47
1416 Added 'Message too big' to the list of mail rejection
1417 reasons (thanks to Marco Gaiarin).
1419 SC/06 Eximstats V1.48
1420 Mainlog lines which have GMT offsets and are too short to
1421 have a flag are now skipped.
1423 SC/07 Eximstats V1.49 (Alain Williams)
1424 Added the -emptyok flag.
1426 SC/08 Eximstats V1.50
1427 Fixes for obtaining the IP address from reject messages.
1429 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1430 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1431 whitesspace changes from 4.64-PH/27
1433 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1436 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1437 are found, allow negative numbers in numeric criteria)
1439 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1441 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1442 to match changes made in 4.64-PH/43
1444 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1446 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1447 "domain" is actually an IP address, and force a failure. This locks out
1448 those revolvers/nameservers that support "A-for-A" lookups, in
1449 contravention of the specifications.
1451 PH/48 When a host name was looked up from an IP address, and the subsequent
1452 forward lookup of the name timed out, the host name was left in
1453 $sender_host_name, contrary to the specification.
1455 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1456 restricted to single-key lookups, Exim was not diagnosing an error if
1457 * or *@ was used with a query-style lookup.
1459 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1461 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1462 long ago, but noone interested enough thought of it. Let's just say that
1463 the "1.1" means that there are some new functions that weren't there at
1464 some point in the past.
1466 PH/51 Error processing for expansion failure of helo_data from an smtp
1467 transport during callout processing was broken.
1469 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1470 tested/used via the -bh/-bhc/-bs options.
1472 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1473 bug, fixed in subsequent PCRE releases).
1475 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1476 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1478 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1484 SC/01 Use a glob alias rather than an array ref in eximstats generated
1485 parser. This improves both readability and performance.
1487 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1488 Don't display local sender or destination tables in eximstats unless
1489 there is data to show.
1490 Added average volumes into the eximstats top table text output.
1492 SC/03 Collect data on the number of addresses (recipients) as well
1493 as the number of messages in eximstats.
1495 TF/01 Correct an error in the documentation for the redirect router. Exim
1496 does (usually) call initgroups() when daemonizing.
1498 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1499 with consistent privilege compared to when running as a daemon.
1501 TF/03 Note in the spec that $authenticated_id is not set for local
1502 submissions from trusted users.
1504 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1505 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1507 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1508 by adding some example configuration directives to the default
1509 configuration file. A little bit of work is required to uncomment the
1510 directives and define how usernames and passwords are checked, but
1511 there is now a framework to start from.
1513 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1514 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1515 without this. I don't know how relevant this is to other LDAP libraries.
1517 PH/02 Add the verb name to the "unknown ACL verb" error.
1519 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1521 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1523 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1524 directory not expanded when it should be if an expanded home directory
1525 was set for the address (which is overridden by the transport).
1527 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1530 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1531 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1532 because it is too late at that time, and has no effect.
1534 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1535 security issue with \' (bugzilla #107). I could not use the
1536 PQescapeStringConn() function, because it needs a PGconn value as one of
1539 PH/08 When testing addresses using -bt, indicate those final addresses that
1540 are duplicates that would not cause an additional delivery. At least one
1541 person was confused, thinking that -bt output corresponded to deliveries.
1542 (Suppressing duplicates isn't a good idea as you lose the information
1543 about possibly different redirections that led to the duplicates.)
1545 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1546 systems where poll() doesn't work, in particular OS X.
1548 PH/10 Added more information to debugging output for retry time not reached.
1550 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1551 operations in malware.c.
1553 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1556 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1557 syslog_duplication set false, log lines that would normally be written
1558 both the the main log and to the reject log were not written to syslog at
1561 PH/14 In the default configuration, change the use of "message" in ACL warn
1562 statements to "add_header".
1564 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1565 not followed by a command (e.g. "seen endif").
1567 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1568 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1571 PH/17 Added extra conditions to the default value of delay_warning_condition
1575 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1576 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1577 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1580 The Auto-Submitted: and various List- headers are standardised, whereas I
1581 don't think Precedence: ever was.
1583 PH/18 Refactored debugging code in route_finduser() to show more information,
1584 in particular, the error code if getpwnam() issues one.
1586 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1587 This is apparently needed in addition to the PH/07 change above to avoid
1588 any possible encoding problems.
1590 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1591 but not after initializing Perl.
1593 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1594 output them only if debugging. By default they are written stderr,
1595 apparently, which is not desirable.
1597 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1600 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1603 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1605 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1606 authenticated or an ident call has been made. Suppress the default
1607 values for $authenticated_id and $authenticated_sender (but permit -oMai
1608 and -oMas) when testing with -bh.
1610 PH/24 Re-jigged the order of the tests in the default configuration so that the
1611 tests for valid domains and recipients precede the DNS black list and CSA
1612 tests, on the grounds that those ones are more expensive.
1614 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1615 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1616 This bug exists in every version of Exim that I still have, right back to
1619 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1620 However, an attempt to turn on case-sensitivity in a regex key by
1621 including (?-i) didn't work because the subject string was already
1622 lowercased, and the effects were non-intuitive. It turns out that a
1623 one-line patch can be used to allow (?-i) to work as expected.
1629 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1630 other effects) broke the use of negated acl sub-conditions.
1632 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1635 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1636 "Deny" causes Exim to reject the incoming connection with a 554 error.
1637 Unfortunately, if there is a major crisis, such as a disk failure,
1638 tcp-wrappers gives "deny", whereas what one would like would be some
1639 kind of temporary error. A kludge has been added to help with this.
1640 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1641 554 error is used if errno is still zero or contains ENOENT (which occurs
1642 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1645 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1647 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1648 errors. Otherwise a message that provokes a temporary error (when other
1649 messages do not) can cause a whole host to time out.
1651 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1652 addresses were routed directly to files or pipes from a redirect router.
1653 File deliveries just didn't batch; pipe deliveries might have suffered
1656 PH/06 A failure to get a lock for a hints database would erroneously always say
1657 "Failed to get write lock", even when it was really a read lock.
1659 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1660 of 0600. This has been changed to use the value of the lockfile_mode
1661 option (which defaults to 0600).
1663 PH/08 Applied small patch from the Sieve maintainer.
1665 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1666 folder from quota calculations, a direct delivery into this folder messed
1667 up the contents of the maildirsize file. This was because the regex was
1668 used only to exclude .Trash (or whatever) when the size of the mailbox
1669 was calculated. There was no check that a delivery was happening into an
1670 excluded directory. This bug has been fixed by ignoring all quota
1671 processing for deliveries into excluded directories.
1673 PH/10 Added the maildirfolder_create_regex option to appendfile.
1679 PH/01 The code for finding all the local interface addresses on a FreeBSD
1680 system running IPv6 was broken. This may well have applied to all BSD
1681 systems, as well as to others that have similar system calls. The broken
1682 code found IPv4 interfaces correctly, but gave incorrect values for the
1683 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1684 that it would not match correctly against @[] and not recognize the IPv6
1687 PH/02 The ipliteral router was not recognizing addresses of the form user@
1688 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1690 PH/03 Added disable_ipv6.
1692 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1693 decoded form, because it is most often used to construct To: headers
1694 lines in autoreplies, and the decoded form may well be syntactically
1695 invalid. However, $reply_address has leading white space removed, and all
1696 newlines turned into spaces so that the autoreply transport does not
1699 PH/05 If group was specified without a user on a router, and no group or user
1700 was specified on a transport, the group from the router was ignored.
1702 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1703 for visible compile-time settings that can be used to change these
1704 numbers, for those that want even more. Backwards compatibility with old
1705 spool files has been maintained. However, going back to a previous Exim
1706 release will lost any variables that are in spool files.
1708 PH/07 Two small changes when running in the test harness: increase delay when
1709 passing a TCP/IP connection to a new process, in case the original
1710 process has to generate a bounce, and remove special handling of
1711 127.0.0.2 (sic), which is no longer necessary.
1713 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1714 be the same on different OS.
1716 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1719 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1720 whether --show-vars was specified or not
1722 JJ/02 exipick: Added support for new ACL variable spool format introduced
1725 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1726 syntactically invalid From: or Reply-to: line, and a filter used this to
1727 generate an autoreply, and therefore failed to obtain an address for the
1728 autoreply, Exim could try to deliver to a non-existent relative file
1729 name, causing unrelated and misleading errors. What now happens is that
1730 it logs this as a hard delivery error, but does not attempt to create a
1733 PH/11 The exinext utility has a -C option for testing purposes, but although
1734 the given file was scanned by exinext itself; it wasn't being passed on
1735 when Exim was called.
1737 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1738 an end-of-file indication when reading a command response.
1740 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1741 compiled. In many other places in Exim, IPv6 addresses are always
1742 recognized, so I have changed this. It also means that IPv4 domain
1743 literals of the form [IPV4:n.n.n.n] are now always recognized.
1745 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1746 used if the router is not running as root, for example, when verifying at
1747 ACL time, or when using -bh. The debugging output from this situation was
1748 non-existent - all you got was a failure to exec. I have made two
1751 (a) Failures to set uid/gid, the current directory, or a process leader
1752 in a subprocess such as that created by queryprogram now generate
1753 suitable debugging ouput when -d is set.
1755 (b) The queryprogram router detects when it is not running as root,
1756 outputs suitable debugging information if -d is set, and then runs
1757 the subprocess without attempting to change uid/gid.
1759 PH/15 Minor change to Makefile for building test_host (undocumented testing
1762 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1763 additional section of a DNS packet that returns MX or SRV records.
1764 Instead, it always explicitly searches for A/AAAA records. This avoids
1765 major problems that occur when a DNS server includes only records of one
1766 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1767 fixed another bug: if SRV records were looked up and the corresponding
1768 address records were *not* found in the additional section, the port
1769 values from the SRV records were lost.
1771 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1772 using the correct key (the original address) when searching the retry
1773 rules in order to find which one to use for generating the retry hint.
1775 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1776 adding the default one. Similarly, if it contains a Reply-To: header, the
1777 errors_reply_to option, if set, is not used.
1779 PH/19 When calculating a retry time, Exim used to measure the "time since
1780 failure" by looking at the "first failed" field in the retry record. Now
1781 it does not use this if it is later than than the arrival time of the
1782 message. Instead it uses the arrival time. This makes for better
1783 behaviour in cases where some deliveries succeed, thus re-setting the
1784 "first failed" field. An example is a quota failure for a huge message
1785 when small messages continue to be delivered. Without this change, the
1786 "time since failure" will always be short, possible causing more frequent
1787 delivery attempts for the huge message than are intended.
1788 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1790 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1791 $1, $2, $3) because the numerical variables can be reset during some
1792 expansion items (e.g. "match"), thereby losing the authentication data.
1794 PH/21 Make -bV show the size of off_t variables so that the test suite can
1795 decide whether to run tests for quotas > 2G.
1797 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1798 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1799 filecount value is greater than 2G or if a quota value is greater than 2G
1800 on a system where the size of off_t is not greater than 4, a panic error
1803 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1804 never match. The debug and -bh output now contains an explicit error
1805 message indicating a malformed IPv4 address or mask.
1807 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1808 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1809 PH/23 above applies.
1811 PH/25 Do not write to syslog when running in the test harness. The only
1812 occasion when this arises is a failure to open the main or panic logs
1813 (for which there is an explicit test).
1815 PH/26 Added the /no_tell option to "control=freeze".
1817 PH/27 If a host name lookup failed very early in a connection, for example, if
1818 the IP address matched host_lookup and the reverse lookup yielded a name
1819 that did not have a forward lookup, an error message of the form "no IP
1820 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1821 could be logged. Now it outputs the IP address instead of "NULL".
1823 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1824 allows the sender and the authenticated sender to be set when
1825 submitting a message from within Exim. Since child_open_exim() is
1826 documented for local_scan(), the new function should be too.
1828 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1829 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1830 results in an empty string is now treated as unset.
1832 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1834 PH/31 Added sender_verify_fail logging option.
1836 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1837 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1838 tidied the source and removed it altogether.
1840 PH/33 When a queue run was abandoned because the load average was too high, a
1841 log line was always written; now it is written only if the queue_run log
1842 selector is set. In addition, the log line for abandonment now contains
1843 information about the queue run such as the pid. This is always present
1844 in "start" and "stop" lines but was omitted from the "abandon" line.
1846 PH/34 Omit spaces between a header name and the colon in the error message that
1847 is given when verify = headers_syntax fails (if there are lots of them,
1848 the message gets confusing).
1850 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1851 names, as there are now some PTR records that contain slashes. This check
1852 is only to protect against broken name servers that fall over on strange
1853 characters, so the fact that it applies to all lookups doesn't matter.
1855 PH/36 Now that the new test suite is complete, we can remove some of the
1856 special code in Exim that was needed for the old test suite. For example,
1857 sorting DNS records because real resolvers return them in an arbitrary
1858 order. The new test suite's fake resolver always returns records in the
1861 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1862 bounces) except when queue_only is set, to avoid logging races between
1863 the different processes.
1865 PH/38 Panic-die if .include specifies a non-absolute path.
1867 PH/39 A tweak to the "H" retry rule from its user.
1869 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1870 a label. They prevented compilation on older perls.
1872 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1873 a warning to be raised on newish perls.
1875 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1876 on queue. Changes to match documented behaviour of showing count of
1877 messages matching specified criteria.
1879 PH/40 Changed the default ident timeout from 30s to 5s.
1881 PH/41 Added support for the use of login_cap features, on those BSD systems
1882 that have them, for controlling the resources used by pipe deliveries.
1884 PH/42 The content-scanning code uses fopen() to create files in which to put
1885 message data. Previously it was not paying any attention to the mode of
1886 the files. Exim runs with umask(0) because the rest of the code creates
1887 files with open(), and sets the required mode explicitly. Thus, these
1888 files were ending up world-writeable. This was not a big issue, because,
1889 being within the spool directory, they were not world-accessible. I have
1890 created a function called modefopen, which takes an additional mode
1891 argument. It sets umask(777), creates the file, chmods it to the required
1892 mode, then resets the umask. All the relevant calls to fopen() in the
1893 content scanning code have been changed to use this function.
1895 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1896 to 24 hours. This avoids potential overflow problems when processing G
1897 and H retry rules. I suspect nobody ever tinkers with this value.
1899 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1901 PH/45 When the plaintext authenticator is running as a client, the server's
1902 challenges are checked to ensure they are valid base64 strings. By
1903 default, the authentication attempt is cancelled if an invalid string is
1904 received. Setting client_ignore_invalid_base64 true ignores these errors.
1905 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1906 they are received. Thus, the responses can be made to depend on the
1907 challenges. If an invalid string is ignored, an empty string is placed in
1910 PH/46 Messages that are created by the autoreply transport now contains a
1911 References: header, in accordance with RFCs 2822 and 3834.
1913 PH/47 Added authenticated_sender_force to the smtp transport.
1915 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1917 PH/49 Installed latest patch from the Sieve maintainer.
1919 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1920 was also set, the appendfile transport was unnecessarily scanning a
1921 directory of message files (e.g. for maildir delivery) to find the count
1922 of files (along with the size), even though it did not need this
1923 information. It now does the scan only if it needs to find either the
1924 size of the count of files.
1926 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1928 PH/52 Two bugs concerned with error handling when the smtp transport is
1931 (i) Exim was not creating retry information for temporary errors given
1932 for individual recipients after the DATA command when the smtp transport
1933 was used in LMTP mode. This meant that they could be retried too
1934 frequently, and not timed out correctly.
1936 (ii) Exim was setting the flag that allows error details to be returned
1937 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1938 recipients that were returned after the DATA command.
1940 PH/53 This is related to PH/52, but is more general: for any failing address,
1941 when detailed error information was permitted to be returned to the
1942 sender, but the error was temporary, then after the final timeout, only
1943 "retry timeout exceeded" was returned. Now it returns the full error as
1944 well as "retry timeout exceeded".
1946 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1947 do this, and (what is worse) MTAs that accept it.
1949 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1950 will now be deprecated.
1952 PH/56 New os.c-cygwin from the Cygwin maintainer.
1954 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1955 formats (previously only available in exim formats via -bpr, -bpru,
1956 and -bpra. Now also available in native and exiqgrep formats)
1958 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1959 with very large, slow to parse queues
1961 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1963 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1965 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1966 responses to authentication challenges, though it was showing the
1967 challenges; (ii) I've removed the CR characters from the debug output for
1970 PH/58 Allow for the insertion of a newline as well as a space when a string
1971 is turned into more than one encoded-word during RFC 2047 encoding. The
1972 Sieve code now uses this.
1974 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1975 data_4xx, lost_connection, tls_required.
1977 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1978 message was being sent as an SMTP response.
1980 PH/61 Add -l and -k options to exicyclog.
1982 PH/62 When verifying, if an address was redirected to one new address, so that
1983 verification continued, and the new address failed or deferred after
1984 having set something in $address_data, the value of $address_data was not
1985 passed back to the ACL. This was different to the case when no
1986 redirection occurred. The value is now passed back in both cases.
1988 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1989 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1990 use login_cap.h, so on its own it isn't the distinguishing feature. The
1991 new name refers directly to the setclassresources() function.
1993 PH/65 Added configuration files for NetBSD3.
1995 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1997 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1998 is preferred over IPv4.
2000 PH/68 The bounce_return_message and bounce_return_body options were not being
2001 honoured for bounces generated during the reception of non-SMTP messages.
2002 In particular, this applied to messages rejected by the ACL. This bug has
2003 been fixed. However, if bounce_return_message is true and bounce_return_
2004 body is false, the headers that are returned for a non-SMTP message
2005 include only those that have been read before the error was detected.
2006 (In the case of an ACL rejection, they have all been read.)
2008 PH/69 The HTML version of the specification is now built in a directory called
2009 spec_html instead of spec.html, because the latter looks like a path with
2010 a MIME-type, and this confuses some software.
2012 PH/70 Catch two compiler warnings in sieve.c.
2014 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2015 function verify_get_ident() calls ip_connect() to connect a socket, but
2016 if the "connect()" function timed out, ip_connect() used to close the
2017 socket. However, verify_get_ident() also closes the socket later, and in
2018 between Exim writes to the log, which may get opened at this point. When
2019 the socket was closed in ip_connect(), the log could get the same file
2020 descriptor number as the socket. This naturally causes chaos. The fix is
2021 not to close the socket in ip_connect(); the socket should be closed by
2022 the function that creates it. There was only one place in the code where
2023 this was missing, in the iplookup router, which I don't think anybody now
2024 uses, but I've fixed it anyway.
2026 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2027 well as to direct DNS lookups. Otherwise the handling of names in host
2028 lists is inconsistent and therefore confusing.
2034 PH/01 Two changes to the default runtime configuration:
2036 (1) Move the checks for relay_from_hosts and authenticated clients from
2037 after to before the (commented out) DNS black list checks.
2039 (2) Add control=submission to the relay_from_hosts and authenticated
2040 clients checks, on the grounds that messages accepted by these
2041 statements are most likely to be submissions.
2043 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2045 (1) Generate an error if the third argument for the ${prvs expansion is
2048 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2051 (3) Reset the variables that are obtained from the first argument of
2052 ${prvscheck and used in the second argument before leaving the code,
2053 because their memory is reclaimed, so using them afterwards may do
2056 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2057 one (it's much easier than Tom thought :-).
2059 (5) Because of (4), we can now allow for the use of $prvscheck_result
2060 inside the third argument.
2062 PH/03 For some reason, the default setting of PATH when running a command from
2063 a pipe transport was just "/usr/bin". I have changed it to
2066 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2067 anything to be listed in the output from -bV.
2069 PH/05 When a filter generated an autoreply, the entire To: header line was
2070 quoted in the delivery log line, like this:
2072 => >A.N.Other <ano@some.domain> <original@ddress> ...
2074 This has been changed so that it extracts the operative address. There
2075 may be more than one such address. If so, they are comma-separated, like
2078 => >ano@some.domain,ona@other.domain <original@ddress> ...
2080 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2081 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2082 not being looked up in the rDNS to get a host name, Exim was showing the
2083 IP address twice in Received: lines, even though the IP addresses were
2084 identical. For example:
2086 Received: from [1.2.3.4] (helo=[1.2.3.4])
2088 However, if the real host name was known, it was omitting the HELO data
2089 if it matched the actual IP address. This has been tidied up so that it
2090 doesn't show the same IP address twice.
2092 PH/07 When both +timestamp and +memory debugging was on, the value given by
2093 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2094 called by the debug printing, thereby overwriting the timestamp buffer.
2095 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2097 PH/08 When the original message was included in an autoreply transport, it
2098 always said "this is a copy of the message, including all the headers",
2099 even if body_only or headers_only was set. It now gives an appropriate
2102 PH/09 Applied a patch from the Sieve maintainer which:
2104 o fixes some comments
2105 o adds the (disabled) notify extension core
2106 o adds some debug output for the result of if/elsif tests
2107 o points to the current vacation draft in the documentation
2108 and documents the missing references header update
2112 o fixes a bug in processing the envelope test (when testing
2113 multiple envelope elements, the last element determinted the
2116 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2117 Electronic Mail") by including:
2119 Auto-submitted: auto-generated
2121 in the messages that it generates (bounce messages and others, such as
2122 warnings). In the case of bounce messages for non-SMTP mesages, there was
2123 also a typo: it was using "Auto_submitted" (underscore instead of
2124 hyphen). Since every message generated by Exim is necessarily in response
2125 to another message, thes have all been changed to:
2127 Auto-Submitted: auto-replied
2129 in accordance with these statements in the RFC:
2131 The auto-replied keyword:
2133 - SHOULD be used on messages sent in direct response to another
2134 message by an automatic process,
2136 - MUST NOT be used on manually-generated messages,
2138 - MAY be used on Delivery Status Notifications (DSNs) and Message
2139 Disposition Notifications (MDNs),
2141 - MUST NOT be used on messages generated by automatic or periodic
2142 processes, except for messages which are automatic responses to
2145 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2146 to the default Received: header definition.
2148 PH/12 Added log selector acl_warn_skipped (default on).
2150 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2151 variables because (a) they are in the wrong storage pool and (b) even if
2152 they were copied, it wouldn't work properly because of the caching.
2154 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2155 checking when decoding. Apparently there are clients that generate
2156 overlong encoded strings. Why am I not surprised?
2158 PH/15 If the first argument of "${if match_address" was not empty, but did not
2159 contain an "@" character, Exim crashed. Now it writes a panic log message
2160 and treats the condition as false.
2162 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2164 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2165 extension "envelope-auth". The code is finished and in agreement with
2166 other implementations, but there is no documentation so far and in fact,
2167 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2168 not changing the active code.
2170 Print executed "if" and "elsif" statements when debugging is used. This
2171 helps a great deal to understand what a filter does.
2173 Document more things not specified clearly in RFC3028. I had all this
2174 sorted out, when out of a sudden new issues came to my mind. Oops."
2176 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2179 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2180 canonical form (as documented). However, after a host name lookup from
2181 the IP address, check_host() was doing a simple string comparison with
2182 addresses acquired from the DNS when checking that the found name did
2183 have the original IP as one of its addresses. Since any found IPv6
2184 addresses are likely to be in abbreviated form, the comparison could
2185 fail. Luckily, there already exists a function for doing the comparison
2186 by converting both addresses to binary, so now that is used instead of
2187 the text comparison.
2189 PH/20 There was another similar case to PH/19, when a complete host name was
2190 given in a host list; looking up its IP address could give an abbreviated
2191 form, whereas the current host's name might or might not be abbreviated.
2192 The same fix has been applied.
2198 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2199 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2202 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2203 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2205 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2207 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2208 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2209 Also, for "Auto-Submitted", treat anything other than "no" as
2210 non-personal, in accordance with RFC 3834. (Previously it treated
2211 anything starting "auto-" as non-personal.)
2213 TF/01 The control=submission/name=... option had a problem with syntax
2214 errors if the name included a slash character. The /name= option
2215 now slurps the rest of the string, so it can include any characters
2216 but it must come last in the list of options (after /sender_retain
2219 PH/05 Some modifications to the interface to the fake nameserver for the new
2227 TK/01 Added the "success_on_redirect" address verification option. See
2228 NewStuff for rationale and an example.
2230 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2232 PH/02 Patch to exigrep to allow it to work on syslog lines.
2234 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2235 fread() to skip over the body file's header line, because in Cygwin the
2236 header line is locked and is inaccessible.
2238 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2239 co-exist for some time) to make it clear that it is the Exim ID that is
2240 referenced, not the Message-ID: header line.
2242 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2243 string_format() function, because snprintf() does not exist on all
2246 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2247 ${stat: expansion item.
2249 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2250 protocol synchronization error", to keep the pedants happy.
2252 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2253 well as for IRIX systems, when gcc is being used. See the host.c source
2256 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2258 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2261 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2262 transport and to the smtp transport in LMTP mode.
2264 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2266 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2267 run a filter in a subprocess. This could lead to confusion in subsequent
2268 lookups in the parent process. There should also be a search_tidyup() at
2269 the end of the subprocess.
2271 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2272 only if the host matched helo_try_verify_hosts, which caused the
2273 verification to occur when the EHLO/HELO command was issued. The ACL just
2274 tested the remembered result. Now, if a previous verification attempt has
2275 not happened, "verify = helo" does it there and then.
2277 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2279 TK/03 Fix log output including CR from clamd.
2281 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2282 exist provoked a memory error which could cause a segfault.
2284 PH/15 Installed PCRE 6.2
2286 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2288 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2289 of the problem. Specifically, suggested +O2 rather than +O1 for the
2292 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2294 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2295 record, the port was not correctly logged when the outgoing_port log
2296 selector was set (it logged the transort's default port).
2298 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2299 fallback_hosts, and "hosts" in the smtp transport.
2301 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2302 host errors such as "Connection refused".
2304 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2305 authentication with radiusclient 0.4.9:
2307 - Error returned from rc_read_config was caught wrongly
2308 - Username/password not passed on to radius server due to wrong length.
2310 The presumption is that some radiusclient API changes for 4.51/PH/17
2311 were not taken care of correctly. The code is still untested by me (my
2312 Linux distribution still has 0.3.2 of radiusclient), but it was
2313 contributed by a Radius user.
2315 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2316 expanding the "port" option of the smtp transport.
2318 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2319 while reading a MIME header. Thanks to Tom Hughes for a patch.
2321 PH/24 Include config.h inside local_scan.h so that configuration settings are
2324 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2325 that in an ACL for RCPT (for example), you can examine exactly what was
2328 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2329 commands, but it was not correctly comparing the address with the actual
2330 client host address. Thus, it would show the EHLO address in Received:
2331 header lines when this was not necessary.
2333 PH/27 Added the % operator to ${eval:}.
2335 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2336 it should be ignoring failures (because with -C, for example, it has lost
2337 privilege). It wasn't ignoring creation failures other than "already
2340 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2343 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2344 because an input line was too long, either on its own, or by virtue of
2345 too many continuations, the temporary file was not being removed, and the
2346 return code was incorrect.
2348 PH/31 Missing "BOOL" in function definition in filtertest.c.
2350 PH/32 Applied Sieve patches from the maintainer.
2352 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2354 PH/33 Added "verify = not_blind".
2356 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2357 Local/Makefile (with some defaults set). These are used in built scripts
2358 such as exicyclog, but they have never been used in the exim_install
2359 script (though there are many overriding facilities there). I have
2360 arranged that the exim_install script now takes note of these two
2363 PH/35 Installed configuration files for Dragonfly.
2365 PH/36 When a locally submitted message by a trusted user did not contain a
2366 From: header, and the sender address was obtained from -f or from an SMTP
2367 MAIL command, and the trusted user did not use -F to supply a sender
2368 name, $originator_name was incorrectly used when constructing a From:
2369 header. Furthermore, $originator_name was used for submission mode
2370 messages from external hosts without From: headers in a similar way,
2371 which is clearly wrong.
2373 PH/37 Added control=suppress_local_fixups.
2375 PH/38 When log_selector = +received_sender was set, and the addition of the
2376 sender made the log line's construction buffer exactly full, or one byte
2377 less than full, an overflow happened when the terminating "\n" was
2380 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2381 when the result of a list match is failure because a DNS lookup failed.
2383 PH/40 RM_COMMAND is now used in the building process.
2385 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2386 the "build-* directories that it finds.
2388 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2389 address in a domain literal was a prefix of an interface address.
2391 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2392 when verifying a sender address, unless rewrite_headers is false.
2394 PH/44 Wrote a long comment about why errors_to addresses are verified as
2395 recipients, not senders.
2397 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2398 the ratelimit ACL was added.
2400 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2402 PH/46 Added extra information about PostgreSQL errors to the error string.
2404 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2405 avoiding the need to install special zones in a real server. This is
2406 backwards compatible; if it can't find the fake resolver, it drops back.
2407 Thus, both old and new test suites can be run.
2409 TF/02 Added util/ratelimit.pl
2411 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2412 clock is set back in time.
2414 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2415 Candler <B.Candler@pobox.com>.
2417 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2418 OK for addresses that are the result of redirections.
2420 PH/48 A number of further additions for the benefit of the new test suite,
2421 including a fake gethostbyname() that interfaces to the fake DNS resolver
2424 TF/06 The fix for widen_domains has also been applied to qualify_single and
2425 search_parents which are the other dnslookup options that can cause
2428 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2431 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2433 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2434 service" if it encountered an MX record with an empty target hostname.
2435 The message is now "an MX or SRV record indicated no SMTP service".
2437 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2438 if the DNS of the sending site is misconfigured. This is quite a
2439 common situation. This change restores the behaviour of treating a
2440 helo verification defer as a failure.
2442 PH/51 If self=fail was set on a router, the bounce message did not include the
2443 actual error message.
2449 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2451 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2452 command itself ended in error, the underlying message about the transport
2453 filter timeout was being overwritten with the pipe command error. Now the
2454 underlying error message should be appended to the second error message.
2456 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2458 PH/02 Reduce the amount of output that "make" produces by default. Full output
2459 can still be requested.
2461 PH/03 The warning log line about a condition test deferring for a "warn" verb
2462 was being output only once per connection, rather than after each
2463 occurrence (because it was using the same function as for successful
2464 "warn" verbs). This seems wrong, so I have changed it.
2466 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2467 it should not have, which might have caused a crash in the right
2468 circumstances, but probably never did.
2470 PH/04 Installed a modified version of Tony Finch's patch to make submission
2471 mode fix the return path as well as the Sender: header line, and to
2472 add a /name= option so that you can make the user's friendly name appear
2475 TF/03 Added the control = fakedefer ACL modifier.
2477 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2478 Mark Lowes for thorough testing.
2480 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2482 TK/03 Merged latest SRS patch from Miles Wilton.
2484 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2485 with the definition in sysexits.h (which is #included earlier).
2486 Fortunately, Exim does not actually use EX_OK. The code used to try to
2487 preserve the sysexits.h value, by assumimg that macro definitions were
2488 scanned for macro replacements. I have been disabused of this notion,
2489 so now the code just undefines EX_OK before #including unistd.h.
2491 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2492 in the smtp transport. When a block could not be written in a single
2493 write() function, the timeout was being re-applied to each part-write.
2494 This seems wrong - if the receiver was accepting one byte at a time it
2495 would take for ever. The timeout is now adjusted when this happens. It
2496 doesn't have to be particularly precise.
2498 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2499 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2501 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2502 without a domain if the check to <postmaster@domain> fails.
2504 SC/01 Eximstats: added -xls and the ability to specify output files
2505 (patch written by Frank Heydlauf).
2507 SC/02 Eximstats: use FileHandles for outputing results.
2509 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2511 SC/04 Eximstats: fixed display of large numbers with -nvr option
2513 SC/05 Eximstats: fixed merging of reports with empty tables.
2515 SC/06 Eximstats: added the -include_original_destination flag
2517 SC/07 Eximstats: removed tabs and trailing whitespace.
2519 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2521 TK/06 MBOX spool code: Add real "From " MBOX separator line
2522 so the .eml file is really in mbox format (even though
2523 most programs do not really care). Patch from Alex Miller.
2525 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2526 The latter is generated from $received_to and is only set if the
2527 message has one envelope recipient. SA can use these headers,
2528 obviously out-of-the-box. Patch from Alex Miller.
2530 PH/08 The ${def test on a variable was returning false if the variable's
2531 value was "0", contrary to what the specification has always said!
2532 The result should be true unless the variable is empty.
2534 PH/09 The syntax error of a character other than { following "${if
2535 def:variable_name" (after optional whitespace) was not being diagnosed.
2536 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2537 accidental colon was present, for example, could give incorrect results.
2539 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2540 result is used (not including appendfile, where other changes are about
2543 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2544 This involved changing a lot of size variables from int to off_t. It
2545 should work with maildirs and everything.
2547 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2548 spamd dying while we are connected to it.
2550 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2553 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2554 function for BDB 4.3.
2556 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2558 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2559 the sources for PCRE have been re-arranged and more files are now
2562 PH/15 The code I had for printing potentially long long variables in PH/11
2563 above was not the best (it lost precision). The length of off_t variables
2564 is now inspected at build time, and an appropriate printing format (%ld
2565 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2566 to be "long long int" or "long int". This is needed for the internal
2567 formatting function string_vformat().
2569 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2570 the configuration file to be ":syslog", then the script "guesses" where
2571 the logs files are, rather than using the compiled in default. In our
2572 case the guess is not the same as the compiled default, so the script
2573 suddenly stopped working when I started to use syslog. The patch checks
2574 to see if log_file_path is "". If so, it attempts to read it from exim
2575 with no configuration file to get the compiled in version, before it
2576 falls back to the previous guessing code."
2578 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2579 implementing BATV in an Exim configuration. See NewStuff for the gory
2582 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2583 Makefile that are specific to HP-UX.
2585 PH/18 If the "use_postmaster" option was set for a recipient callout together
2586 with the "random" option, the postmaster address was used as the MAIL
2587 FROM address for the random test, but not for the subsequent recipient
2588 test. It is now used for both.
2590 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2591 patch removes a few documentation additions to RFC 3028, because the
2592 latest draft now contains them. It adds the new en;ascii-case comparator
2593 and a new error check for 8bit text in MIME parts. Comparator and
2594 require names are now matched exactly. I enabled the subaddress
2595 extension, but it is not well tested yet (read: it works for me)."
2597 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2598 rework some of the code of TK/09 above to avoid the hardwired use of
2599 "%lld" and "long long". Replaced the call to snprintf() with a call to
2602 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2603 records point to non-existent hosts", "retry timeout exceeded", and
2604 "retry time not reached for any host after a long failure period".
2606 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2607 experimental DomainKeys support:
2609 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2610 (2) On an error such as an illegally used "control", the wrong name for
2611 the control was given.
2613 These problems did NOT occur unless DomainKeys support was compiled.
2615 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2617 PH/24 Added ${if match_ip condition.
2619 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2620 databases so that it will be absolutely obvious if a crash occurs in the
2621 DB library. This is a regular occurrence (often caused by mis-matched
2624 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2625 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2626 picked up on a user's system that detects such things. There doesn't seem
2627 to be a gcc warning option for this - only an attribute that has to be
2628 put on the function's prototype. It seems that in Fedora Core 4 they have
2629 set this on a number of new functions. No doubt there will be more in due
2632 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2633 specify a transport. However, if an address that was verified by such a
2634 router was the subject of a callout, Exim crashed because it tried to
2635 read the rcpt_include_affixes from the non-existent transport. Now it
2636 just assumes that the setting of that option is false. This bug was
2637 introduced by 4.51/PH/31.
2639 PH/28 Changed -d+all to exclude +memory, because that information is very
2640 rarely of interest, but it makes the output a lot bigger. People tend to
2641 do -d+all out of habit.
2643 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2644 code in os-type was giving problems when libc.so lives in lib64, like on
2647 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2648 aren't the modern standard, and it seems that some systems' include files
2649 don't always have them. Exim was already checking for some of the newer
2650 ones like T_AAAA, and defining it itself. I've added checks for all the
2651 record types that Exim uses.
2653 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2654 not automatically generating a new one, as it is supposed to. This
2655 prevented TLS from working. If the file did exist, but contained invalid
2656 data, a new version was generated, as expected. It was only the case of a
2657 non-existent file that was broken.
2659 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2660 with a change in libdomainkeys > 0.64.
2662 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2663 from DNS. If the selector record carries the flag, it now has
2664 precedence over the domain-wide flag.
2666 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2668 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2669 the use of a port name that isn't defined in /etc/services) occurred, the
2670 message was deferred as in a normal delivery, and thus remained on the
2671 spool, instead of being failed because of the mua_wrapper setting. This
2672 is now fixed, and I tidied up some of the mua_wrapper messages at the
2675 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2676 the messages in a hash of arrays rather than using individual hashes.
2677 This is a bit cleaner and results in dramatic memory savings, albeit
2678 at a slight CPU cost.
2680 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2681 as requested by Marc Sherman.
2683 SC/10 Eximstats: added histograms for user specified patterns as requested
2686 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2688 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2689 fopen() in the content-scanning modules that did not already have it.
2695 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2696 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2698 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2700 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2702 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2703 to test Sieve filters that use "vacation".
2705 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2706 that changes the way the GnuTLS parameters are stored in the cache file.
2707 The new format can be generated externally. For backward compatibility,
2708 if the data in the cache doesn't make sense, Exim assumes it has read an
2709 old-format file, and it generates new data and writes a new file. This
2710 means that you can't go back to an older release without removing the
2713 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2714 work if there are any delivery delays because "one_time" forces the
2715 parent to be marked "delivered", so its unseen clone is never tried
2716 again. For this reason, Exim now forbids the simultaneous setting of
2719 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2720 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2721 entry if you want to know the details. The fix, however, neglected to
2722 consider the case when local delivery batching is involved. The test for
2723 "previously delivered" was not happening when checking to see if an
2724 address could be batched with a previous (undelivered) one; under
2725 certain circumstances this could lead to multiple deliveries to the same
2728 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2729 in its include files, and this causes problems building Exim.
2731 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2732 header_syntax) but Exim was just ignoring anything given after a slash.
2733 In particular, this caused confusion with an attempt to use "verify =
2734 reverse_host_lookup/defer_ok". An error is now given when options are
2735 supplied for verify items that do not have them. (Maybe reverse_host_
2736 lookup should have a defer_ok option, but that's a different point.)
2738 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2739 defined by RFC 821) to 2048, because there were problems with some AUTH
2740 commands, and RFC 1869 says the size should be increased for extended
2741 SMTP commands that take arguments.
2743 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2746 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2747 "unknown" error; now it says that the functionality isn't in the binary.
2749 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2750 an address' error message when a string expansion fails (syntax or
2751 whatever). Otherwise the password may appear in the log. Following change
2752 PH/42 below, there is no longer a chance of it appearing in a bounce
2755 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2757 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2758 of its addresses was ever tried. (Bugzilla bug #2.)
2760 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2761 the result incorrectly in the debug output. (It correctly added a newline
2762 to what was transported.)
2764 TF/01 Added $received_time.
2766 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2767 commented out examples of how to interface to a virus scanner and to
2768 SpamAssassin. Also added commented examples of av_scanner and
2769 spamd_address settings.
2771 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2772 and controls are allowed in which ACLs. There were a couple of minor
2773 errors. Some of the entries in the conditions table (which is a table of
2774 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2775 negation of where the condition IS allowed.
2777 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2779 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2780 header file does not have a version number, so I've had to invent a new
2781 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2782 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2783 radiusclient), but it was contributed by a Radius user.
2785 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2786 files or directories, for OpenSSL.
2788 PH/19 When an Exim process that is running as root has to create an Exim log
2789 file, it does so in a subprocess that runs as exim:exim so as to get the
2790 ownership right at creation (otherwise, other Exim processes might see
2791 the file with the wrong ownership). There was no test for failure of this
2792 fork() call, which would lead to the process getting stuck as it waited
2793 for a non-existent subprocess. Forks do occasionally fail when resources
2794 run out. I reviewed all the other calls to fork(); they all seem to check
2797 PH/20 When checking for unexpected SMTP input at connect time (before writing
2798 the banner), Exim was not dealing correctly with a non-positive return
2799 from the read() function. If the client had disconnected by this time,
2800 the result was a log entry for a synchronization error with an empty
2801 string after "input=" when read() returned zero. If read() returned -1
2802 (an event I could not check), uninitialized data bytes were printed.
2803 There were reports of junk text (parts of files, etc) appearing after
2806 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2808 PH/22 Added support for macro redefinition, and (re)definition in between
2809 driver and ACL definitions.
2811 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2812 forgetting to use the resulting value; it was using the unexpanded value.
2814 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2815 hadn't been configured. The fix is from Juergen Kreileder, who
2816 understands it better than I do:
2818 "Here's what I see happening with three configured cyrus_sasl
2819 authenticators configured (plain, login, cram-md5):
2821 On startup auth_cyrus_sasl_init() gets called for each of these.
2822 This means three calls to sasl_listmech() without a specified mech_list.
2823 => SASL tests which mechs of all available mechs actually work
2824 => three warnings about OTP not working
2825 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2827 With the patch, sasl_listmech() also gets called three times. But now
2828 SASL's mech_list option is set to the server_mech specified in the the
2829 authenticator. Or in other words, the answer from sasl_listmech()
2830 gets limited to just the mech you're testing for (which is different
2832 => the return list contains just 'plain' or 'login', 'cram-md5' or
2833 nothing depending on the value of ob->server_mech.
2835 I've just tested the patch: Authentication still works fine,
2836 unavailable mechs specified in the exim configuration are still
2837 caught, and the auth.log warnings about OTP are gone."
2839 PH/25 When debugging is enabled, the contents of the command line are added
2840 to the debugging output, even when log_selector=+arguments is not
2843 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2844 answer is "GNU", and only if the return is "GNU/something" is the answer
2847 PH/27 $acl_verify_message is now set immediately after the failure of a
2848 verification in an ACL, and so is available in subsequent modifiers. In
2849 particular, the message can be preserved by coding like this:
2851 warn !verify = sender
2852 set acl_m0 = $acl_verify_message
2854 Previously, $acl_verify_message was set only while expanding "message"
2855 and "log_message" when a very denied access.
2857 PH/28 Modified OS/os.c-Linux with
2859 -#ifndef OS_LOAD_AVERAGE
2860 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2862 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2863 nomenclature these days.)
2865 PH/29 Installed patch from the Sieve maintainer that adds the options
2866 sieve_useraddress and sieve_subaddress to the redirect router.
2868 PH/30 In these circumstances:
2869 . Two addresses routed to the same list of hosts;
2870 . First host does not offer TLS;
2871 . First host accepts first address;
2872 . First host gives temporary error to second address;
2873 . Second host offers TLS and a TLS session is established;
2874 . Second host accepts second address.
2875 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2876 and peerdn, if requested) that were in fact used only for the second
2879 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2880 attention to any local part prefix or suffix that was matched by the
2881 router that accepted the address. It now behaves in the same way as it
2882 does for delivery: the affixes are removed from the local part unless
2883 rcpt_include_affixes is set on the transport.
2885 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2886 timeout during the DATA phase of an incoming message.
2888 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2889 applied a patch sanctioned by the Sieve maintainer.
2891 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2892 the uid or gid is negative. A case of a negative gid caused this to be
2893 noticed. The fix allows for either to be negative.
2895 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2896 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2899 PH/36 The change PH/12 above was broken. Fixed it.
2901 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2902 the grounds that routing the same address twice would always produce the
2903 same answer. This might have been true once, but it is certainly no
2904 longer true now. Routing a child address may depend on the previous
2905 routing that produced that child. Some complicated redirection strategies
2906 went wrong when messages had multiple recipients, and made Exim's
2907 behaviour dependent on the order in which the addresses were given.
2909 I have moved the duplicate checking until after the routing is complete.
2910 Exim scans the addresses that are assigned to local and remote
2911 transports, and removes any duplicates. This means that more work will be
2912 done, as duplicates will always all be routed, but duplicates are
2913 presumably rare, so I don't expect this is of any significance.
2915 For deliveries to pipes, files, and autoreplies, the duplicate checking
2916 still happens during the routing process, since they are not going to be
2919 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2920 It corrects a timeout issue with spamd. This is Ian's comment: "The
2921 background is that sometimes spamd either never reads data from a
2922 connection it has accepted, or it never writes response data. The exiscan
2923 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2924 blindly assumes that writes won't block so it may never time out."
2926 PH/39 Allow G after quota size as well as K and M.
2928 PH/40 The value set for $authenticated_id in an authenticator may not contain
2929 binary zeroes or newlines because the value is written to log lines and
2930 to spool files. There was no check on this. Now the value is run through
2931 the string_printing() function so that such characters are converted to
2932 printable escape sequences.
2934 PH/41 $message_linecount is a new variable that contains the total number of
2935 lines in the message. Compare $body_linecount, which is the count for the
2938 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2939 bounce and delay warning messages, except in certain special cases, which
2942 (a) An SMTP error message from a remote host;
2943 (b) A message specified in a :fail: redirection;
2944 (c) A message specified in a "fail" command in a system filter;
2945 (d) A message specified in a FAIL return from the queryprogram router;
2946 (e) A message specified by the cannot_route_message router option.
2948 In these cases only, Exim does include the error details in bounce and
2949 warning messages. There are also a few cases where bland messages such
2950 as "unrouteable address" or "local delivery error" are given.
2952 PH/43 $value is now also set for the "else" part of a ${run expansion.
2954 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2955 being worked on, but at least Exim now implements the latest version to
2958 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2959 process to complete was treated as a delivery failure, a timeout while
2960 writing the message to the pipe was logged, but erroneously treated as a
2961 successful delivery. Such timeouts include transport filter timeouts. For
2962 consistency with the overall process timeout, these timeouts are now
2963 treated as errors, giving rise to delivery failures by default. However,
2964 there is now a new Boolean option for the pipe transport called
2965 timeout_defer, which, if set TRUE, converts the failures into defers for
2966 both kinds of timeout. A transport filter timeout is now identified in
2969 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2970 systems where "make" and "gmake" are different, calling "gmake" at top
2971 level broke things. I've arranged for the value of $(MAKE) to be passed
2972 from the Makefile to this script so that it can call the same version of
2976 A note about Exim versions 4.44 and 4.50
2977 ----------------------------------------
2979 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2980 changes of various kinds. As a consequence, a big documentation update was
2981 needed. This delayed the release for rather longer than seemed good, especially
2982 in the light of a couple of (minor) security issues. Therefore, the changes
2983 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2984 release. So 4.44 and 4.50 are in effect two different branches that both start
2987 I have left the 4.50 change log unchanged; it contains all the changes since
2988 4.43. The change log for 4.44 is below; many of its items are identical to
2989 those for 4.50. This seems to be the most sensible way to preserve the
2990 historical information.
2996 1. Minor wording change to the doc/README.SIEVE file.
2998 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2999 computation of the current number of files was incorrect.
3001 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3002 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3005 4. Give more explanation in the error message when the command for a transport
3006 filter fails to execute.
3008 5. There are several places where Exim runs a non-Exim command in a
3009 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3010 was being done only for the command run by the queryprogram router. It is
3011 now done for all such subprocesses. The other cases are: ${run, transport
3012 filters, and the commands run by the lmtp and pipe transports.
3014 6. Added CONFIGURE_GROUP build-time option.
3016 7. Some older OS have a limit of 256 on the maximum number of file
3017 descriptors. Exim was using setrlimit() to set 1000 as a large value
3018 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3019 systems. I've change it so that if it can't get 1000, it tries for 256.
3021 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3022 was an oversight, and furthermore, ever since the addition of extra
3023 controls (e.g. 4.43/32), the checks on when to allow different forms of
3024 "control" were broken. There should now be diagnostics for all cases when a
3025 control that does not make sense is encountered.
3027 9. Added the /retain_sender option to "control=submission".
3029 10. $recipients is now available in the predata ACL (oversight).
3031 11. Tidy the search cache before the fork to do a delivery from a message
3032 received from the command line. Otherwise the child will trigger a lookup
3033 failure and thereby defer the delivery if it tries to use (for example) a
3034 cached ldap connection that the parent has called unbind on.
3036 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3037 of $address_data from the recipient verification was clobbered by the
3038 sender verification.
3040 13. The value of address_data from a sender verification is now available in
3041 $sender_address_data in subsequent conditions in the ACL statement.
3043 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3045 15. Added a new option "connect=<time>" to callout options, to set a different
3048 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3049 was its contents. (It was OK if the option was not defined at all.)
3051 17. A "Completed" log line is now written for messages that are removed from
3052 the spool by the -Mrm option.
3054 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3055 information about exactly what failed.
3057 19. Added -dd to debug only the daemon process.
3059 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3060 handles timeouts, both on the server side and network timeouts. Renamed the
3061 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3063 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3064 It is now set to "smtps".
3066 22. $host_address is now set to the target address during the checking of
3067 ignore_target_hosts.
3069 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3070 being passed; this would have caused $sender_host_name to have been used if
3071 matching the list had actually called for a host name (not very likely,
3072 since this list is usually IP addresses). A host name is now passed as
3075 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3076 code that specifies a non-restarting handler (typically sigaction() in
3077 modern systems) in an attempt to fix a rare and obscure crash bug.
3079 25. Narrowed the window for a race in the daemon that could cause it to ignore
3080 SIGCHLD signals. This is not a major problem, because they are used only to
3081 wake it up if nothing else does.
3083 26. A malformed maildirsize file could cause Exim to calculate negative values
3084 for the mailbox size or file count. Odd effects could occur as a result.
3085 The maildirsize information is now recalculated if the size or filecount
3088 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3089 support for a long time. Removed HAVE_SYS_VFS_H.
3091 28. Installed the latest version of exipick from John Jetmore.
3093 29. In an address list, if the pattern was not a regular expression, an empty
3094 subject address (from a bounce message) matched only if the pattern was an
3095 empty string. Non-empty patterns were not even tested. This was the wrong
3096 because it is perfectly reasonable to use an empty address as part of a
3097 database query. An empty address is now tested by patterns that are
3098 lookups. However, all the other forms of pattern expect the subject to
3099 contain a local part and a domain, and therefore, for them, an empty
3100 address still always fails if the pattern is not itself empty.
3102 30. Exim went into a mad DNS loop when attempting to do a callout where the
3103 host was specified on an smtp transport, and looking it up yielded more
3104 than one IP address.
3106 31. Re-factored the code for checking spool and log partition space into a
3107 function that finds that data and another that does the check. The former
3108 is then used to implement four new variables: $spool_space, $log_space,
3109 $spool_inodes, and $log_inodes.
3111 32. The RFC2047 encoding function was originally intended for short strings
3112 such as real names; it was not keeping to the 75-character limit for
3113 encoded words that the RFC imposes. It now respects the limit, and
3114 generates multiple encoded words if necessary. To be on the safe side, I
3115 have increased the buffer size for the ${rfc2047: expansion operator from
3118 33. It is now permitted to omit both strings after an "if" condition; if the
3119 condition is true, the result is "true". As before, when the second string
3120 is omitted, a false condition yields an empty string. This makes it less
3121 cumbersome to write custom ACL and router conditions.
3123 34. Failure to deliver a bounce message always caused it to be frozen, even if
3124 there was an errors_to setting on the router. The errors_to setting is now
3127 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3128 canonical form (fully expanded) before being placed in
3129 $sender_host_address.
3131 36. The table in the code that translates DNS record types into text (T_A to
3132 "A" for instance) was missing entries for NS and CNAME. It is just possible
3133 that this could have caused confusion if both these types were looked up
3134 for the same domain, because the text type is used as part of Exim's
3135 per-process caching. But the chance of anyone hitting this buglet seems
3138 37. The dnsdb lookup has been extended in a number of ways.
3140 (1) There is a new type, "zns", which walks up the domain tree until it
3141 finds some nameserver records. It should be used with care.
3143 (2) There is a new type, "mxh", which is like "mx" except that it returns
3144 just the host names, not the priorities.
3146 (3) It is now possible to give a list of domains (or IP addresses) to be
3147 looked up. The behaviour when one of the lookups defers can be
3148 controlled by a keyword.
3150 (4) It is now possible to specify the separator character for use when
3151 multiple records are returned.
3153 38. The dnslists ACL condition has been extended: it is now possible to supply
3154 a list of IP addresses and/or domains to be looked up in a particular DNS
3157 39. Added log_selector=+queue_time_overall.
3159 40. When running the queue in the test harness, wait just a tad after forking a
3160 delivery process, to get repeatability of debugging output.
3162 41. Include certificate and key file names in error message when GnuTLS fails
3163 to set them up, because the GnuTLS error message doesn't include the name
3164 of the failing file when there is a problem reading it.
3166 42. Allow both -bf and -bF in the same test run.
3168 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3170 44. The "Exiscan patch" is now merged into the mainline Exim source.
3172 45. Sometimes the final signoff response after QUIT could fail to get
3173 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3174 < 0 before doing a fflush(). This bug looks as though it goes back to the
3175 introduction of TLS in release 3.20, but "sometimes" must have been rare
3176 because the tests only now provoked it.
3178 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3179 (this can affect the format of dates).
3181 47. exim_tidydb, when checking for the continued existence of a message for
3182 which it has found a message-specific retry record, was not finding
3183 messages that were in split spool directories. Consequently, it was
3184 deleting retry records that should have stayed in existence.
3186 48. Steve fixed some bugs in eximstats.
3188 49. The SPA authentication driver was not abandoning authentication and moving
3189 on to the next authenticator when an expansion was forced to fail,
3190 contradicting the general specification for all authenticators. Instead it
3191 was generating a temporary error. It now behaves as specified.
3193 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3194 (the order specifies the preference for clients). The order is now AES256,
3195 AES128, 3DES, ARCFOUR128.
3197 51. Small patch to Sieve code - explicitly set From: when generating an
3200 52. Exim crashed if a remote delivery caused a very long error message to be
3201 recorded - for instance if somebody sent an entire SpamAssassin report back
3202 as a large number of 550 error lines. This bug was coincidentally fixed by
3203 increasing the size of one of Exim's internal buffers (big_buffer) that
3204 happened as part of the Exiscan merge. However, to be on the safe side, I
3205 have made the code more robust (and fixed the comments that describe what
3208 53. Now that there can be additional text after "Completed" in log lines (if
3209 the queue_time_overall log selector is set), a one-byte patch to exigrep
3210 was needed to allow it to recognize "Completed" as not the last thing in
3213 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3214 patch that reportedly fixes this has been added. I am not expert enough to
3215 create a test for it. This is what the patch creator wrote:
3217 "I found a little strange behaviour of ldap code when working with
3218 Windows 2003 AD Domain, where users was placed in more than one
3219 Organization Units. When I tried to give exim partial DN, the exit code
3220 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3221 But simultaneously result of request was absolutely normal ldap result,
3222 so I produce this patch..."
3224 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3225 REFERENCE, so I have modified the code to exclude the patch when that macro
3228 55. Some experimental protocols are using DNS PTR records for new purposes. The
3229 keys for these records are domain names, not reversed IP addresses. The
3230 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3231 leaves it alone. Component reversal etc. now happens only for IP addresses.
3234 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3236 57. Double the size of the debug message buffer (to 2048) so that more of very
3237 long debug lines gets shown.
3239 58. The exicyclog utility now does better if the number of log files to keep
3240 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3242 59. Two changes related to the smtp_active_hostname option:
3244 (1) $smtp_active_hostname is now available as a variable.
3245 (2) The default for smtp_banner uses $smtp_active_hostname instead
3246 of $primary_hostname.
3248 60. The host_aton() function is supposed to be passed a string that is known
3249 to be a valid IP address. However, in the case of IPv6 addresses, it was
3250 not checking this. This is a hostage to fortune. Exim now panics and dies
3251 if the condition is not met. A case was found where this could be provoked
3252 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3253 components; fortuitously, this particular loophole had already been fixed
3254 by change 4.50/55 above.
3256 If there are any other similar loopholes, the new check in host_aton()
3257 itself should stop them being exploited. The report I received stated that
3258 data on the command line could provoke the exploit when Exim was running as
3259 exim, but did not say which command line option was involved. All I could
3260 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3261 running as the user.
3264 61. There was a buffer overflow vulnerability in the SPA authentication code
3265 (which came originally from the Samba project). I have added a test to the
3266 spa_base64_to_bits() function which I hope fixes it.
3269 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3270 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3272 63. The daemon start-up calls getloadavg() while still root for those OS that
3273 need the first call to be done as root, but it missed one case: when
3274 deliver_queue_load_max is set with deliver_drop_privilege. This is
3275 necessary for the benefit of the queue runner, because there is no re-exec
3276 when deliver_drop_privilege is set.
3278 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3279 This has been fixed.
3281 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3282 was in use, was not putting the data itself into the right store pool;
3283 consequently, it could be overwritten for a subsequent message in the same
3284 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3287 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3289 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3290 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3291 the function were treating the return as a boolean value, which happened to
3292 work because 0=false and not-0=true, but is not correct code.
3294 68. The host_aton() function was not handling scoped IPv6 addresses (those
3295 with, for example, "%eth0" on the end) correctly.
3297 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3298 negated items (that is, ~something) in unsigned ints. Some compilers
3299 apparently mutter when there is no cast.
3301 70. If an address verification called from an ACL failed, and did not produce a
3302 user-specific message (i.e. there was only a "system" message), nothing was
3303 put in $acl_verify_message. In this situation, it now puts the system
3306 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3307 session; change 4.31/43 added the unwanted input to the log line - except
3308 that it did not do this in the start of session case. It now does.
3310 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3311 This is wrong and can cause the other end to generate a synchronization
3312 error if it is another Exim or anything else that does the synchronization
3313 check. A QUIT command is no longer sent after a timeout.
3315 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3316 during host lookups.
3318 74. The defer_ok option of callout verification was not working if it was used
3319 when verifying addresses in header lines, that is, for this case:
3321 verify = header_sender/callout=defer_ok
3323 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3324 those file descriptors could be used for SMTP connections. If anything
3325 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3326 could be sent to the SMTP client, causing chaos. The daemon now opens
3327 stdin, stdout, and stderr to /dev/null when it puts itself into the
3330 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3331 log by default. The user can override this with suitable Perl magic.
3333 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3334 the log message when discard triggers, was not working for the DATA ACL or
3335 for the non-SMTP ACL.
3337 78. Error message wording change in sieve.c.
3339 79. If smtp_accept_max_per_host was set, the number of connections could be
3340 restricted to fewer than expected, because the daemon was trying to set up
3341 a new connection before checking whether the processes handling previous
3342 connections had finished. The check for completed processes is now done
3343 earlier. On busy systems, this bug wouldn't be noticed because something
3344 else would have woken the daemon, and it would have reaped the completed
3347 80. If a message was submitted locally by a user whose login name contained one
3348 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3349 It caused a spool format error. I have fixed the spool reading code. A
3350 related problem was that the "from" clause in the Received: line became
3351 illegal because of the space(s). It is now covered by ${quote_local_part.
3353 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3356 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3358 83. Patch from Sieve maintainer to fix unterminated string problem in
3359 "vacation" handling.
3361 84. Some minor changes to the Linux configuration files to help with other
3362 OS variants using glibc.
3364 85. One more patch for Sieve to update vacation handling to latest spec.
3367 ----------------------------------------------------
3368 See the note above about the 4.44 and 4.50 releases.
3369 ----------------------------------------------------
3375 1. Change 4.43/35 introduced a bug that caused file counts to be
3376 incorrectly computed when quota_filecount was set in an appendfile
3379 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3380 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3383 3. Give more explanation in the error message when the command for a transport
3384 filter fails to execute.
3386 4. There are several places where Exim runs a non-Exim command in a
3387 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3388 was being done only for the command run by the queryprogram router. It is
3389 now done for all such subprocesses. The other cases are: ${run, transport
3390 filters, and the commands run by the lmtp and pipe transports.
3392 5. Some older OS have a limit of 256 on the maximum number of file
3393 descriptors. Exim was using setrlimit() to set 1000 as a large value
3394 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3395 systems. I've change it so that if it can't get 1000, it tries for 256.
3397 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3398 was an oversight, and furthermore, ever since the addition of extra
3399 controls (e.g. 4.43/32), the checks on when to allow different forms of
3400 "control" were broken. There should now be diagnostics for all cases when a
3401 control that does not make sense is encountered.
3403 7. $recipients is now available in the predata ACL (oversight).
3405 8. Tidy the search cache before the fork to do a delivery from a message
3406 received from the command line. Otherwise the child will trigger a lookup
3407 failure and thereby defer the delivery if it tries to use (for example) a
3408 cached ldap connection that the parent has called unbind on.
3410 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3411 of $address_data from the recipient verification was clobbered by the
3412 sender verification.
3414 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3415 was its contents. (It was OK if the option was not defined at all.)
3417 11. A "Completed" log line is now written for messages that are removed from
3418 the spool by the -Mrm option.
3420 12. $host_address is now set to the target address during the checking of
3421 ignore_target_hosts.
3423 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3424 being passed; this would have caused $sender_host_name to have been used if
3425 matching the list had actually called for a host name (not very likely,
3426 since this list is usually IP addresses). A host name is now passed as
3429 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3430 code that specifies a non-restarting handler (typically sigaction() in
3431 modern systems) in an attempt to fix a rare and obscure crash bug.
3433 15. Narrowed the window for a race in the daemon that could cause it to ignore
3434 SIGCHLD signals. This is not a major problem, because they are used only to
3435 wake it up if nothing else does.
3437 16. A malformed maildirsize file could cause Exim to calculate negative values
3438 for the mailbox size or file count. Odd effects could occur as a result.
3439 The maildirsize information is now recalculated if the size or filecount
3442 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3443 support for a long time. Removed HAVE_SYS_VFS_H.
3445 18. Updated exipick to current release from John Jetmore.
3447 19. Allow an empty sender to be matched against a lookup in an address list.
3448 Previously the only cases considered were a regular expression, or an
3451 20. Exim went into a mad DNS lookup loop when doing a callout where the
3452 host was specified on the transport, if the DNS lookup yielded more than
3455 21. The RFC2047 encoding function was originally intended for short strings
3456 such as real names; it was not keeping to the 75-character limit for
3457 encoded words that the RFC imposes. It now respects the limit, and
3458 generates multiple encoded words if necessary. To be on the safe side, I
3459 have increased the buffer size for the ${rfc2047: expansion operator from
3462 22. Failure to deliver a bounce message always caused it to be frozen, even if
3463 there was an errors_to setting on the router. The errors_to setting is now
3466 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3467 canonical form (fully expanded) before being placed in
3468 $sender_host_address.
3470 24. Updated eximstats to version 1.33
3472 25. Include certificate and key file names in error message when GnuTLS fails
3473 to set them up, because the GnuTLS error message doesn't include the name
3474 of the failing file when there is a problem reading it.
3476 26. Expand error message when OpenSSL has problems setting up cert/key files.
3479 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3480 (this can affect the format of dates).
3482 28. exim_tidydb, when checking for the continued existence of a message for
3483 which it has found a message-specific retry record, was not finding
3484 messages that were in split spool directories. Consequently, it was
3485 deleting retry records that should have stayed in existence.
3487 29. eximstats updated to version 1.35
3488 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3489 1.35 - bugfix such that pie charts by volume are generated correctly
3491 30. The SPA authentication driver was not abandoning authentication and moving
3492 on to the next authenticator when an expansion was forced to fail,
3493 contradicting the general specification for all authenticators. Instead it
3494 was generating a temporary error. It now behaves as specified.
3496 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3497 (the order specifies the preference for clients). The order is now AES256,
3498 AES128, 3DES, ARCFOUR128.
3500 31. Small patch to Sieve code - explicitly set From: when generating an
3503 32. Exim crashed if a remote delivery caused a very long error message to be
3504 recorded - for instance if somebody sent an entire SpamAssassin report back
3505 as a large number of 550 error lines. This bug was coincidentally fixed by
3506 increasing the size of one of Exim's internal buffers (big_buffer) that
3507 happened as part of the Exiscan merge. However, to be on the safe side, I
3508 have made the code more robust (and fixed the comments that describe what
3511 33. Some experimental protocols are using DNS PTR records for new purposes. The
3512 keys for these records are domain names, not reversed IP addresses. The
3513 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3514 leaves it alone. Component reversal etc. now happens only for IP addresses.
3517 34. The host_aton() function is supposed to be passed a string that is known
3518 to be a valid IP address. However, in the case of IPv6 addresses, it was
3519 not checking this. This is a hostage to fortune. Exim now panics and dies
3520 if the condition is not met. A case was found where this could be provoked
3521 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3522 components; fortuitously, this particular loophole had already been fixed
3523 by change 4.50/55 or 4.44/33 above.
3525 If there are any other similar loopholes, the new check in host_aton()
3526 itself should stop them being exploited. The report I received stated that
3527 data on the command line could provoke the exploit when Exim was running as
3528 exim, but did not say which command line option was involved. All I could
3529 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3530 running as the user.
3533 35. There was a buffer overflow vulnerability in the SPA authentication code
3534 (which came originally from the Samba project). I have added a test to the
3535 spa_base64_to_bits() function which I hope fixes it.
3538 36. The daemon start-up calls getloadavg() while still root for those OS that
3539 need the first call to be done as root, but it missed one case: when
3540 deliver_queue_load_max is set with deliver_drop_privilege. This is
3541 necessary for the benefit of the queue runner, because there is no re-exec
3542 when deliver_drop_privilege is set.
3544 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3545 was in use, was not putting the data itself into the right store pool;
3546 consequently, it could be overwritten for a subsequent message in the same
3547 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3550 38. Sometimes the final signoff response after QUIT could fail to get
3551 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3552 < 0 before doing a fflush(). This bug looks as though it goes back to the
3553 introduction of TLS in release 3.20, but "sometimes" must have been rare
3554 because the tests only now provoked it.
3560 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3561 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3562 Now it returns an integer. A number of calls were still expecting a T/F
3563 return. Fortuitously, in all cases, the tests worked in OK situations,
3564 which is the norm. However, things would have gone wrong on any write
3565 failures on the smtp file descriptor. This function is used when sending
3566 messages over SMTP and also when doing verify callouts.
3568 2. When Exim is called to do synchronous delivery of a locally submitted
3569 message (the -odf or -odi options), it no longer closes stderr before doing
3572 3. Implemented the mua_wrapper option.
3574 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3576 5. Implemented the functions header_remove(), header_testname(),
3577 header_add_at_position(), and receive_remove_recipient(), and exported them
3580 6. If an ACL "warn" statement specified the addition of headers, Exim already
3581 inserted X-ACL-Warn: at the start if there was no header name. However, it
3582 was not making this test for the second and subsequent header lines if
3583 there were newlines in the string. This meant that an invalid header could
3584 be inserted if Exim was badly configured.
3586 7. Allow an ACL "warn" statement to add header lines at the start or after all
3587 the Received: headers, as well as at the end.
3589 8. Added the rcpt_4xx retry error code.
3591 9. Added postmaster_mailfrom=xxx to callout verification option.
3593 10. Added mailfrom=xxxx to the callout verification option, for verify=
3596 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3597 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3599 12. Inserted some casts to stop certain compilers warning when using pointer
3600 differences as field lengths or precisions in printf-type calls (mostly
3601 affecting debugging statements).
3603 13. Added optional readline() support for -be (dynamically loaded).
3605 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3606 same clock tick as a message's arrival, so that its received time was the
3607 same as the "first fail" time on the retry record, and that message
3608 remained on the queue past the ultimate address timeout, every queue runner
3609 would try a delivery (because it was past the ultimate address timeout) but
3610 after another failure, the ultimate address timeout, which should have then
3611 bounced the address, did not kick in. This was a "< instead of <=" error;
3612 in most cases the first failure would have been in the next clock tick
3613 after the received time, and all would be well.
3615 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3616 being recognized when the domain list was tested by the match_domain
3617 condition in an expansion string.
3619 16. Added the ${str2b64: operator.
3621 17. Exim was always calling setrlimit() to set a large limit for the number of
3622 processes, without checking whether the existing limit was already
3623 adequate. (It did check for the limit on file descriptors.) Furthermore,
3624 errors from getrlimit() and setrlimit() were being ignored. Now they are
3625 logged to the main and panic logs, but Exim does carry on, to try to do its
3626 job under whatever limits there are.
3628 18. Imported PCRE 5.0.
3630 19. Trivial typo in log message " temporarily refused connection" (the leading
3633 20. If the log selector return_path_on_delivery was set and an address was
3634 redirected to /dev/null, the delivery process crashed because it assumed
3635 that a return path would always be set for a "successful" delivery. In this
3636 case, the whole delivery is bypassed as an optimization, and therefore no
3639 21. Internal re-arrangement: the function for sending a challenge and reading
3640 a response while authentication was assuming a zero-terminated challenge
3641 string. It's now changed to take a pointer and a length, to allow for
3642 binary data in such strings.
3644 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3646 23. Exim was not respecting finduser_retries when seeking the login of the
3647 uid under which it was called; it was always trying 10 times. (The default
3648 setting of finduser_retries is zero.) Also, it was sleeping after the final
3649 failure, which is pointless.
3651 24. Implemented tls_on_connect_ports.
3653 25. Implemented acl_smtp_predata.
3655 26. If the domain in control=submission is set empty, Exim assumes that the
3656 authenticated id is a complete email address when it generates From: or
3657 Sender: header lines.
3659 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3660 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3661 chown and chgrp in /bin and hostname in /usr/bin.
3663 28. Exim was keeping the "process log" file open after each use, just as it
3664 does for the main log. This opens the possibility of it remaining open for
3665 long periods when the USR1 signal hits a daemon. Occasional processlog
3666 errors were reported, that could have been caused by this. Anyway, it seems
3667 much more sensible not to leave this file open at all, so that is what now
3670 29. The long-running daemon process does not normally write to the log once it
3671 has entered its main loop, and it closes the log before doing so. This is
3672 so that log files can straightforwardly be renamed and moved. However,
3673 there are a couple of unusual error situations where the daemon does write
3674 log entries, and I had neglected to close the log afterwards.
3676 30. The text of an SMTP error response that was received during a remote
3677 delivery was being truncated at 512 bytes. This is too short for some of
3678 the long messages that one sometimes sees. I've increased the limit to
3681 31. It is now possible to make retry rules that apply only when a message has a
3682 specific sender, in particular, an empty sender.
3684 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3685 it possible to be selective about when SMTP synchronization is enforced.
3687 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3689 32. Implemented hosts_connection_nolog.
3691 33. Added an ACL for QUIT.
3693 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3696 35. Added mailbox_size and mailbox_filecount to appendfile.
3698 36. Added control = no_multiline_responses to ACLs.
3700 37. There was a bug in the logic of the code that waits for the clock to tick
3701 in the case where the clock went backwards by a substantial amount such
3702 that the microsecond fraction of "now" was more than the microsecond
3703 fraction of "then" (but the whole seconds number was less).
3705 38. Added support for the libradius Radius client library this is found on
3706 FreeBSD (previously only the radiusclient library was supported).
3712 1. When certain lookups returned multiple values in the form name=value, the
3713 quoting of the values was not always being done properly. Specifically:
3714 (a) If the value started with a double quote, but contained no whitespace,
3716 (b) If the value contained whitespace other than a space character (i.e.
3717 tabs or newlines or carriage returns) it was not quoted.
3718 This fix has been applied to the mysql and pgsql lookups by writing a
3719 separate quoting function and calling it from the lookup code. The fix
3720 should probably also be applied to nisplus, ibase and oracle lookups, but
3721 since I cannot test any of those, I have not disturbed their existing code.
3723 2. A hit in the callout cache for a specific address caused a log line with no
3724 reason for rejecting RCPT. Now it says "Previous (cached) callout
3725 verification failure".
3727 3. There was an off-by-one bug in the queryprogram router. An over-long
3728 return line was truncated at 256 instead of 255 characters, thereby
3729 overflowing its buffer with the terminating zero. As well as fixing this, I
3730 have increased the buffer size to 1024 (and made a note to document this).
3732 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3733 when Exim is waiting for an SMTP response from a remote server, Exim
3734 restarts its select() call on the socket, thereby resetting its timeout.
3735 This is not a problem when such interrupts are rare. Somebody set up a cron
3736 job to run exiwhat every 2 minutes, which is less than the normal select()
3737 timeout (5 or 10 minutes). This meant that the select() timeout never
3738 kicked in because it was always reset. I have fixed this by comparing the
3739 time when an interrupt arrives with the time at the start of the first call
3740 to select(). If more time than the timeout has elapsed, the interrupt is
3741 treated as a timeout.
3743 5. Some internal re-factoring in preparation for the addition of Sieve
3744 extensions (by MH). In particular, the "personal" test is moved to a
3745 separate function, and given an option for scanning Cc: and Bcc: (which is
3746 not set for Exim filters).
3748 6. When Exim created an email address using the login of the caller as the
3749 local part (e.g. when creating a From: or Sender: header line), it was not
3750 quoting the local part when it contained special characters such as @.
3752 7. Installed new OpenBSD configuration files.
3754 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3755 try to make them clearer.
3757 9. Callout options, other than the timeout value, were being ignored when
3758 verifying sender addresses in header lines. For example, when using
3760 verify = header_sender/callout=no_cache
3762 the cache was (incorrectly) being used.
3764 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3765 only the Cygwin environment.
3767 11. When return_path_on_delivery was set as a log selector, if different remote
3768 addresses in the same message used different return paths and parallel
3769 remote delivery occurred, the wrong values would sometimes be logged.
3770 (Whenever a remote delivery process finished, the return path value from
3771 the most recently started remote delivery process was logged.)
3773 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3774 lines when AUTH and/or TLS are in use. This is the "received protocol"
3775 field. Exim used to use "asmtp" for authenticated SMTP, without any
3776 indication (in the protocol name) for TLS use. Now it follows the RFC and
3777 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3778 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3779 names appear in log lines as well as in Received: header lines.
3781 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3782 extensions, and comparison tests, and to fix some bugs.
3784 14. Changes to the "personal" filter test:
3786 (1) The test was buggy in that it was just doing the equivalent of
3787 "contains" tests on header lines. For example, if a user's address was
3788 anne@some.where, the "personal" test would incorrectly be true for
3790 To: susanne@some.where
3792 This test is now done by extracting each address from the header in turn,
3793 and checking the entire address. Other tests that are part of "personal"
3794 are now done using regular expressions (for example, to check local parts
3795 of addresses in From: header lines).
3797 (2) The list of non-personal local parts in From: addresses has been
3798 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3799 taken from the Sieve specification recommendations.
3801 (3) If the message contains any header line starting with "List-" it is
3802 treated as non-personal.
3804 (4) The test for "circular" in the Subject: header line has been removed
3805 because it now seems ill-conceived.
3807 15. Minor typos in src/EDITME comments corrected.
3809 16. Installed latest exipick from John Jetmore.
3811 17. If headers_add on a router specified a text string that was too long for
3812 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3813 of string_sprintf() is now avoided.
3815 18. $message_body_size was not set (it was always zero) when running the DATA
3816 ACL and the local_scan() function.
3818 19. For the "mail" command in an Exim filter, no default was being set for
3819 the once_repeat time, causing a random time value to be used if "once" was
3820 specified. (If the value happened to be <= 0, no repeat happened.) The
3821 default is now 0s, meaning "never repeat". The "vacation" command was OK
3822 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3823 (I found it when inspecting the code).
3825 20. There is now an overall timeout for performing a callout verification. It
3826 defaults to 4 times the callout timeout, which applies to individual SMTP
3827 commands during the callout. The overall timeout applies when there is more
3828 than one host that can be tried. The timeout is checked before trying the
3829 next host. This prevents very long delays if there are a large number of
3830 hosts and all are timing out (e.g. when the network connections are timing
3831 out). The value of the overall timeout can be changed by specifying an
3832 additional sub-option for "callout", called "maxwait". For example:
3834 verify = sender/callout=5s,maxwait=20s
3836 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3837 to the end before writing, but this should make it even safer).
3839 22. Exim was forgetting that it had advertised PIPELINING for the second and
3840 subsequent messages on an SMTP connection. It was also not resetting its
3841 memory on STARTTLS and an internal HELO.
3843 23. When Exim logs an SMTP synchronization error within a session, it now
3844 records whether PIPELINING has been advertised or not.
3846 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3847 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3848 rather than long int.
3850 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3852 26. Added the never_mail option to autoreply.
3858 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3859 crash if the getsockname() call failed; this can happen if a connection is
3860 closed very soon after it is established. The problem was simply in the
3861 order in which certain operations were done, causing Exim to try to write
3862 to the SMTP stream before it had set up the file descriptor. The bug has
3863 been fixed by making things happen in the correct order.
3869 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3870 before the connection was closed, thus losing the rejection response.
3872 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3873 some early Solaris releases, but causes trouble in current releases where
3874 socklen_t is defined.
3876 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3879 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3882 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3883 that releasing the top of it at the end releases what was used for sub-
3884 expansions (unless the block got too big). However, discard this block if
3885 the first thing is a variable or header, so that we can use its block when
3886 it is dynamic (useful for very large $message_headers, for example).
3888 6. Lookups now cache *every* query, not just the most recent. A new, separate
3889 store pool is used for this. It can be recovered when all lookup caches are
3890 flushed. Lookups now release memory at the end of their result strings.
3891 This has involved some general refactoring of the lookup sources.
3893 7. Some code has been added to the store_xxx() functions to reduce the amount
3894 of flapping under certain conditions.
3896 8. log_incoming_interface used to affect only the <= reception log lines. Now
3897 it causes the local interface and port to be added to several more SMTP log
3898 lines, for example "SMTP connection from", and rejection lines.
3900 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3902 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3904 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3905 could be overwritten at the end of the current message (or the start of a
3906 new message if it was set in a HELO ACL). The value is now preserved for
3907 the duration of the SMTP connection.
3909 12. If a transport had a headers_rewrite setting, and a matching header line
3910 contained an unqualified address, that address was qualified, even if it
3911 did not match any rewriting rules. The underlying bug was that the values
3912 of the flags that permit the existence of unqualified sender and recipient
3913 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3914 non-local messages, and by -bnq for local messages) were not being
3915 preserved with the message after it was received.
3917 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3918 "next input=" as part of the text comprising the host identity instead of
3919 the correct text. The code was using the same buffer for two different
3920 strings. However, depending on which order the printing function evaluated
3921 its arguments, the bug did not always show up. Under Linux, for example, my
3922 test suite worked just fine.
3924 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3925 doesn't work with some older versions of Perl. It has been changed to "my",
3926 which in any case is probably the better facility to use.
3928 15. A really picky compiler found some instances of statements for creating
3929 error messages that either had too many or two few arguments for the format
3932 16. The size of the buffer for calls to the DNS resolver has been increased
3933 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3934 for addresses that have a lot of PTR records. This alleviates a problem; it
3935 does not fully solve it.
3937 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3938 buffer now truncates the list and logs the incident, which is the same
3939 action as happens when Exim is looking up a host name and its aliases.
3940 Previously in this situation something unpredictable would happen;
3941 sometimes it was "internal error: store_reset failed".
3943 18. If a server dropped the connection unexpectedly when an Exim client was
3944 using GnuTLS and trying to read a response, the client delivery process
3945 crashed while trying to generate an error log message.
3947 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3948 string, for example:
3950 warn message = H1: something\nH2: something
3952 the text was added as a single header line from Exim's point of view
3953 though it ended up OK in the delivered message. However, searching for the
3954 second and subsequent header lines using $h_h2: did not work. This has been
3955 fixed. Similarly, if a system filter added multiple headers in this way,
3956 the routers could not see them.
3958 20. Expanded the error message when iplsearch is called with an invalid key to
3959 suggest using net-iplsearch in a host list.
3961 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3962 ACLs are no longer actually imposed (and a message to that effect is
3965 22. If a "gecos" field in a passwd entry contained escaped characters, in
3966 particular, if it contained a \" sequence, Exim got it wrong when building
3967 a From: or a Sender: header from that name. A second bug also caused
3968 incorrect handling when an unquoted " was present following a character
3969 that needed quoting.
3971 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3972 was not being matched caselessly.
3974 24. Arranged for all hyphens in the exim.8 source to be escaped with
3977 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3978 properly. Recipient callout cache records were still being keyed to include
3979 the sender, even when use_sender was set false. This led to far more
3980 callouts that were necessary. The sender is no longer included in the key
3981 when use_sender is false.
3983 26. Added "control = submission" modifier to ACLs.
3985 27. Added the ${base62d: operator to decode base 62 numbers.
3987 28. dnsdb lookups can now access SRV records.
3989 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3990 the configuration file.
3992 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3993 (-v) mode. This makes the output for a verbose queue run more intelligible.
3995 31. Added a use_postmaster feature to recipient callouts.
3997 32. Added the $body_zerocount variable, containing the number of binary zero
3998 bytes in the message body.
4000 33. The time of last modification of the "new" subdirectory is now used as the
4001 "mailbox time last read" when there is a quota error for a maildir
4004 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4006 35. Added +ignore_unknown as a special item in host lists.
4008 36. Code for decoding IPv6 addresses in host lists is now included, even if
4009 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4010 address was recognized as an IP address, but was then not correctly decoded
4011 into binary, causing unexpected and incorrect effects when compared with
4018 1. Very minor rewording of debugging text in manualroute to say "list of
4019 hosts" instead of "hostlist".
4021 2. If verify=header_syntax was set, and a header line with an unqualified
4022 address (no domain) and a large number of spaces between the end of the
4023 name and the colon was received, the reception process suffered a buffer
4024 overflow, and (when I tested it) crashed. This was caused by some obsolete
4025 code that should have been removed. The fix is to remove it!
4027 3. When running in the test harness, delay a bit after writing a bounce
4028 message to get a bit more predictability in the log output.
4030 4. Added a call to search_tidyup() just before forking a reception process. In
4031 theory, someone could use a lookup in the expansion of smtp_accept_max_
4032 per_host which, without the tidyup, could leave open a database connection.
4034 5. Added the variables $recipient_data and $sender_data which get set from a
4035 lookup success in an ACL "recipients" or "senders" condition, or a router
4036 "senders" option, similar to $domain_data and $local_part_data.
4038 6. Moved the writing of debug_print from before to after the "senders" test
4041 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4042 problems for message scanning, either using a data ACL, or using
4043 local_scan() because the Received: header was not generated till after they
4044 were called (in order to set the time as the time of reception completion).
4045 I have revised the way this works. The header is now generated after the
4046 body is received, but before the ACL or local_scan() are called. After they
4047 are run, the timestamp in the header is updated.
4053 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4054 before starting a queue runner without re-exec. This happened only when
4055 deliver_drop_privilege was set or when the Exim user was set to root. The
4056 effect of the bug was that timeouts during subsequent deliveries caused
4057 crashes instead of being properly handled. The handler is now left at its
4058 default (and expected) setting.
4060 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4061 message, again when deliver_drop_privilege is set or Exim is run as root.
4062 The bug described in (1) was not present in this case, but the tidying up
4063 of the other signals was missing. I have made the two cases consistent.
4065 3. The ignore_target_hosts setting on a manualroute router was being ignored
4066 for hosts that were looked up using the /MX notation.
4068 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4071 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4072 operated on the sender address. After changing the $sender_address to <>
4073 for the sender address verify, Exim was re-instated it as the original
4074 (before rewriting) address, but remembering that it had rewritten it, so it
4075 wasn't rewriting it again. This bug also had the effect of breaking the
4076 sender address verification caching when the sender address was rewritten.
4078 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4079 This has been changed so that if the ip literal address matches
4080 ignore_target_hosts, the router declines.
4082 7. Added expansion conditions match_domain, match_address, and match_local_
4083 part (NOT match_host).
4085 8. The placeholder for the Received: header didn't have a length field set.
4087 9. Added code to Exim itself and to exim_lock to test for a specific race
4088 condition that could lead to file corruption when using MBX delivery. The
4089 issue is with the lockfile that is created in /tmp. If this file is removed
4090 after a process has opened it but before that process has acquired a lock,
4091 there is the potential for a second process to recreate the file and also
4092 acquire a lock. This could lead to two Exim processes writing to the file
4093 at the same time. The added code performs the same test as UW imapd; it
4094 checks after acquiring the lock that its file descriptor still refers to
4095 the same named file.
4097 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4098 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4101 11. Added the smtp_active_hostname option. If used, this will typically be made
4102 to depend on the incoming interface address. Because $interface_address is
4103 not set up until the daemon has forked a reception process, error responses
4104 that can happen earlier (such as "too many connections") no longer contain
4107 12. If an expansion in a condition on a "warn" statement fails because a lookup
4108 defers, the "warn" statement is abandoned, and the next ACL statement is
4109 processed. Previously this caused the whole ACL to be aborted.
4111 13. Added the iplsearch lookup type.
4113 14. Added ident_timeout as a log selector.
4115 15. Added tls_certificate_verified as a log selector.
4117 16. Added a global option tls_require_ciphers (compare the smtp transport
4118 option of the same name). This controls incoming TLS connections.
4120 17. I finally figured out how to make tls_require_ciphers do a similar thing
4121 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4122 before starting the TLS session.
4124 18. Tabs are now shown as \t in -bP output.
4126 19. If the log selector return_path_on_delivery was set, Exim crashed when
4127 bouncing a message because it had too many Received: header lines.
4129 20. If two routers both had headers_remove settings, and the first one included
4130 a superfluous trailing colon, the final name in the first list and the
4131 first name in the second list were incorrectly joined into one item (with a
4132 colon in the middle).
4138 1. Added -C and -D options to the exinext utility, mainly to make it easier
4139 to include in the automated testing, but these could be helpful when
4140 multiple configurations are in use.
4142 2. The exinext utility was not formatting the output nicely when there was
4143 an alternate port involved in the retry record key, nor when there was a
4144 message id as well (for retries that were specific to a specific message
4145 and a specific host). It was also confused by IPv6 addresses, because of
4146 the additional colons they contain. I have fixed the IPv4 problem, and
4147 patched it up to do a reasonable job for IPv6.
4149 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4150 delivery, the log line now contains "pipelined" if PIPELINING was used.
4152 4. An SMTP transport process used to panic and die if the bind() call to set
4153 an explicit outgoing interface failed. This has been changed; it is now
4154 treated in the same way as a connect() failure.
4156 5. A reference to $sender_host_name in the part of a conditional expansion
4157 that was being skipped was still causing a DNS lookup. This no longer
4160 6. The def: expansion condition was not recognizing references to header lines
4161 that used bh_ and bheader_.
4163 7. Added the _cache feature to named lists.
4165 8. The code for checking quota_filecount in the appendfile transport was
4166 allowing one more file than it should have been.
4168 9. For compatibility with Sendmail, the command line option
4176 and sets the incoming protocol and host name (for trusted callers). The
4177 host name and its colon can be omitted when only the protocol is to be set.
4178 Note the Exim already has two private options, -pd and -ps, that refer to
4179 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4180 "s", but I don't think that's a major issue.
4182 10. A number of refactoring changes to the code, none of which should affect
4185 (a) The number of logging options was getting close to filling up the
4186 32-bit word that was used as a bit map. I have split them into two classes:
4187 those that are passed in the argument to log_write(), and those that are
4188 only ever tested independently outside of that function. These are now in
4189 separate 32-bit words, so there is plenty of room for expansion again.
4190 There is no change in the user interface or the logging behaviour.
4192 (b) When building, for example, log lines, the code previously used a
4193 macro that called string_cat() twice, in order to add two strings. This is
4194 not really sufficiently general. Furthermore, there was one instance where
4195 it was actually wrong because one of the argument was used twice, and in
4196 one call a function was used. (As it happened, calling the function twice
4197 did not affect the overall behaviour.) The macro has been replaced by a
4198 function that can join an arbitrary number of extra strings onto a growing
4201 (c) The code for expansion conditions now uses a table and a binary chop
4202 instead of a serial search (which was left over from when there were very
4203 few conditions). Also, it now recognizes conditions like "pam" even when
4204 the relevant support is not compiled in: a suitably worded error message is
4205 given if an attempt is made to use such a condition.
4207 11. Added ${time_interval:xxxxx}.
4209 12. A bug was causing one of the ddress fields not to be passed back correctly
4210 from remote delivery subprocesses. The field in question was not being
4211 subsequently used, so this caused to problems in practice.
4213 13. Added new log selectors queue_time and deliver_time.
4215 14. Might have fixed a bug in maildirsizefile handling that threw up
4216 "unexpected character" debug warnings, and recalculated the data
4217 unnecessarily. In any case, I expanded the warning message to give more
4220 15. Added the message "Restricted characters in address" to the statements in
4221 the default ACL that block characters like @ and % in local parts.
4223 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4224 Three changes have been made:
4226 (a) There was a serious bug; a negative response to MAIL caused the whole
4227 recipient domain to be cached as invalid, thereby blocking all messages
4228 to all local parts at the same domain, from all senders. This bug has
4229 been fixed. The domain is no longer cached after a negative response to
4230 MAIL if the sender used is not empty.
4232 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4235 (c) A new callout option, "use_sender" has been added for people who want
4236 the modified behaviour.
4242 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4245 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4246 indeed breaks things for older releases.
4248 3. Added additional logging to the case where there is a problem reading data
4249 from a filter that is running in a subprocess using a pipe, in order to
4250 try to track down a specific problem.
4252 4. Testing facility fudge: when running in the test harness and attempting
4253 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4254 getting "No route to host". Convert this to a timeout.
4256 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4259 6. Some OS don't have socklen_t but use size_t instead. This affects the
4260 fifth argument of getsockopt() amongst other things. This is now
4261 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4262 can be set for individual OS. I have set it for SunOS5, OSF1, and
4263 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4264 some earlier ones do not.
4266 7. Change 4.30/15 was not doing the test caselessly.
4268 8. The standard form for an IPv6 address literal was being rejected by address
4269 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4270 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4271 this, as well as the form without the "IPv6" on the front (but only when
4272 address literals are enabled, of course).
4274 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4276 10. Exim crashed if a message with an empty sender address specified by -f
4277 encountered a router with an errors_to setting. This could be provoked only
4278 by a command such as
4282 where an empty string was supplied; "<>" did not hit this bug.
4284 11. Installed PCRE release 4.5.
4286 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4287 remained set. It is now erased.
4289 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4290 times from message ids (which are base 36 rather than the normal 62).
4292 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4293 were being counted as actual protocol errors, and logged if the log
4294 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4295 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4296 and DATA following a set of rejected RCPTs do not count as protocol errors.
4297 In other words, Exim assumes they were pipelined, though this may not
4298 actually be the case. Of course, in all cases the client gets an
4299 appropriate error code.
4301 15. If a lookup fails in an ACL condition, a message about the failure may
4302 be available; it is used if testing the ACL cannot continue, because most
4303 such messages specify what the cause of the deferral is. However, some
4304 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4305 that caused an old message to be retained and used if a later statement
4306 caused a defer, replacing the real cause of the deferral.
4308 16. If an IP address had so many PTR records that the DNS lookup buffer
4309 was not large enough to hold them, Exim could crash while trying to process
4310 the truncated data. It now detects and logs this case.
4312 17. Further to 4.21/58, another change has been made: if (and only if) the
4313 first line of a message (the first header line) ends with CRLF, a bare LF
4314 in a subsequent header line has a space inserted after it, so as not to
4315 terminate the header.
4317 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4318 unnecessarily, used atoi() instead of strtol(), and didn't check the
4319 termination when getting file sizes from file names by regex.
4321 19. Completely re-implemented the support for maildirsize files, in the light
4322 of a number of problems with the previous contributed implementation
4323 (4.30/29). In particular:
4325 . If the quota is zero, the maildirsize file is maintained, but no quota is
4328 . If the maildir directory does not exist, it is created before any attempt
4329 to write a maildirsize file.
4331 . The quota value in the file is just a cache; if the quota is changed in
4332 the transport, the new value overrides.
4334 . A regular expression is available for excluding directories from the
4337 20. The autoreply transport checks the characters in options that define the
4338 message's headers; it allows continued headers, but it was checking with
4339 isspace() after an embedded newline instead of explicitly looking for a
4342 21. If all the "regular" hosts to which an address was routed had passed their
4343 expiry times, and had not reached their retry times, the address was
4344 bounced, even if fallback hosts were defined. Now Exim should go on to try
4347 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4348 equivalent code in the SMTP transport. Some hosts send humungous responses
4349 to HELO/EHLO, more than 1024 it seems.
4351 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4352 gives compiler warnings in some environments. I've now done it "properly",
4355 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4356 (because of problems with the built-in one) was declared to return uschar *
4357 instead of char *, causing compiler failure.
4359 25. Fixed a file descriptor leak when processing alias/forward files.
4361 26. Fixed a minor format string issue in dbfn.c.
4363 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4365 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4366 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4369 29. When a sender address is verified, it is cached, to save repeating the test
4370 when there is more than one recipient in a message. However, when the
4371 verification involves a callout, it is possible for different callout
4372 options to be set for different recipients. It is too complicated to keep
4373 track of this in the cache, so now Exim always runs a verification when a
4374 callout is required, relying on the callout cache for the optimization.
4375 The overhead is duplication of the address routing, but this should not be
4378 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4379 to be verified with callout=postmaster, and the main callout worked but the
4380 postmaster check failed, the verification correctly failed. However, if a
4381 subsequent RCPT command asked for sender verification *without* the
4382 postmaster check, incorrect caching caused this verification also to fail,
4385 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4386 it was not caching the DNS options (qualify_single, search_parents) that
4387 were used when the lookup failed. A subsequent lookup with different
4388 options therefore always gave the same answer, though there were cases
4389 where it should not have. (Example: a "domains = !$mx_any" option on a
4390 dnslookup router: the "domains" option is always processed without any
4391 widening, but the router might have qualify_single set.) Now Exim uses the
4392 cached value only when the same options are set.
4394 32. Added John Jetmore's "exipick" utility to the distribution.
4396 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4397 than a timeout (e.g. a certificate is required, and is not provided), an
4398 Exim server now closes the connection immediately. Previously it waited for
4399 the client to close - but if the client is SSL, it seems that they each
4400 wait for each other, leading to a delay before one of them times out.
4402 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4403 maintained 0.8.x compatibility because I don't think many are using it, and
4404 it is clearly obsolete.
4406 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4409 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4410 client certificate was expired. A simple patch fixes this, though I don't
4411 understand the full logic of why the verify callback is called multiple
4414 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4415 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4416 which causes problems with some clients (such as the Certicom SSL Plus
4417 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4418 disables the coutermeasure allowing Eudora to connect."
4420 38. Exim was not checking that a write() to a log file succeeded. This could
4421 lead to Bad Things if a log got too big, in particular if it hit a file
4422 size limit. Exim now panics and dies if it cannot write to a log file, just
4423 as it does if it cannot open a log file.
4425 39. Modified OS/Makefile-Linux so that it now contains
4427 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4429 The two -D definitions ensure that Exim is compiled with large file
4430 support, which makes it possible to handle log files that are bigger than
4433 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4434 instance) a domain was checked against a named list that involved a lookup,
4435 causing $domain_data to be set, then another domain was checked against the
4436 same list, then the first domain was re-checked, the value of $domain_data
4437 after the final check could be wrong. In particular, if the second check
4438 failed, it could be set empty. This bug probably also applied to
4441 41. The strip_trailing_dot option was not being applied to the address given
4442 with the -f command-line option.
4444 42. The code for reading a message's header from the spool was incrementing
4445 $received_count, but never initializing it. This meant that the value was
4446 incorrect (doubled) while delivering a message in the same process in which
4447 it was received. In the most common configuration of Exim, this never
4448 happens - a fresh exec is done - but it can happen when
4449 deliver_drop_privilege is set.
4451 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4452 it now includes up to 150 characters of the unexpected data in the log
4455 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4456 and building data strings. The size of both of these buffers was 10 000
4457 bytes - far larger than anybody would *ever* want, thought I. Needless to
4458 say, somebody hit the limit. I have increased the maximum line length to
4459 20 000 and the maximum data length of concatenated lines to 100 000. I have
4460 also fixed two bugs, because there was no checking on these buffers. Tsk,
4461 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4462 buffer is too small.
4464 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4465 lsearch lookups. Now it does.
4467 46. When parsing a route_list item in a manualroute router, a fixed-length
4468 buffer was used for the list of hosts. I made this 1024 bytes long,
4469 thinking that nobody would ever have a list of hosts that long. Wrong.
4470 Somebody had a whole pile of complicated expansion conditions, and the
4471 string was silently truncated, leading to an expansion error. It turns out
4472 that it is easier to change to an unlimited length (owing to other changes
4473 that have happened since this code was originally written) than to build
4474 structure for giving a limitation error. The length of the item that
4475 expands into the list of hosts is now unlimited.
4477 47. The lsearch lookup could not handle data where the length of text line was
4478 more than 4095 characters. Such lines were truncated, leading to shortened
4479 data being returned. It should now handle lines of any length.
4481 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4482 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4485 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4486 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4487 no longer happens in comment lines. A list of replacements is now placed
4488 at the head of all of the source files, except those whose only change is
4489 to replace PERL_COMMAND in the very first #! line.
4491 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4492 messages on the queue, with a bottom-up merge sort, using code contributed
4493 by Michael Haardt. This should make operations like -bp somewhat faster on
4494 large queues. It won't affect queue runners, except when queue_run_in_order
4497 51. Installed eximstats 1.31 in the distribution.
4499 52. Added support for SRV lookups to the dnslookup router.
4501 53. If an ACL referred to $message_body or $message_body_end, the value was not
4502 reset for any messages that followed in the same SMTP session.
4504 54. The store-handling optimization for building very long strings was not
4505 differentiating between the different store pools. I don't think this
4506 actually made any difference in practice, but I've tidied it.
4508 55. While running the routers to verify a sender address, $sender_address
4509 was still set to the sender address. This is wrong, because when routing to
4510 send a bounce to the sender, it would be empty. Therefore, I have changed
4511 it so that, while verifying a sender address, $sender_address is set to <>.
4512 (There is no change to what happens when verifying a recipient address.)
4514 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4515 target A or AAAA records (if not already returned) without resetting the
4516 qualify_single or search_parents options of the DNS resolver. These are
4517 inappropriate in this case because the targets of MX and SRV records must
4518 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4519 target that, when qualified, matched something in the local domain. These
4520 two options are now turned off when doing these lookups.
4522 57. It seems that at least some releases of Reiserfs (which does not have the
4523 concept of a fixed number of inodes) returns zero and not -1 for the
4524 number of available inodes. This interacted badly with check_spool_inodes,
4525 which assumed that -1 was the "no such thing" setting. What I have done is
4526 to check that the total number of inodes is greater than zero before doing
4527 the test of how many are available.
4529 58. When a "warn" ACL statement has a log_message modifier, the message is
4530 remembered, and not repeated. This is to avoid a lot of repetition when a
4531 message has many recipients that cause the same warning to be written.
4532 Howewer, Exim was preserving the list of already written lines for an
4533 entire SMTP session, which doesn't seem right. The memory is now reset if a
4534 new message is started.
4536 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4537 debugging output unless log_rewrite was also set.
4539 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4540 of (int)(handle) when we know that handle contains (void *)(-1).
4542 61. The Exim daemon panic-logs an error return when it closes the incoming
4543 connection. However "connection reset by peer" seems to be common, and
4544 isn't really an error worthy of noting specially, so that particular error
4547 62. When Exim is trying to find all the local interfaces, it used to panic and
4548 die if the ioctl to get the interface flags failed. However, it seems that
4549 on at least one OS (Solaris 9) it is possible to have an interface that is
4550 included in the list of interfaces, but for which you get a failure error
4551 for this call. This happens when the interface is not "plumbed" into a
4552 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4553 failure of the "get flags" call assumes that the interface is down.
4555 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4556 makes life easier for people who are doing arithmetic on fields extracted
4557 from dates, where you often get leading zeros that should not be
4558 interpreted as octal.
4560 64. Added qualify_domain to the redirect router, to override the global
4563 65. If a pathologically long header line contained very many addresses (the
4564 report of this problem mentioned 10 000) and each of them was rewritten,
4565 Exim could use up a very large amount of memory. (It kept on making new
4566 copies of the header line as it rewrote, and never released the old ones.)
4567 At the expense of a bit more processing, the header rewriting function has
4568 been changed so that it no longer eats memory in this way.
4570 66. The generation of the Received: header has been moved from the time that a
4571 message starts to be received, to the time that it finishes. The timestamp
4572 in the Received: header should now be very close to that of the <= log
4573 line. There are two side-effects of this change:
4575 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4576 logged header lines no longer include the local Received: line, because
4577 it has not yet been created. The same applies to a copy of the message
4578 that is returned to a non-SMTP sender when a message is rejected.
4580 (b) When a filter file is tested using -bf, no additional Received: header
4581 is added to the test message. After some thought, I decided that this
4584 This change does not affect the value of $received_for. It is still set
4585 after address rewriting, but before local_scan() is called.
4587 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4589 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4590 gave an unhelpful panic error message, and a defer error. I have managed to
4591 change this behaviour so that it now rejects any supplied certificate,
4592 which seems right, as the list of acceptable certificates is empty.
4594 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4595 gave an unhelpful defer error. I have not managed to make this reject any
4596 supplied certificates, but the error message it gives is "no certificate
4597 supplied", which is not helpful.
4599 70. exigrep's output now also includes lines that are not associated with any
4600 message, but which match the given pattern. Implemented by a patch from
4601 Martin Sluka, which also tidied up the Perl a bit.
4603 71. Recipient callout verification, like sender verification, was using <> in
4604 the MAIL FROM command. This isn't really the right thing, since the actual
4605 sender may affect whether the remote host accepts the recipient or not. I
4606 have changed it to use the actual sender in the callout; this means that
4607 the cache record is now keyed on a recipient/sender pair, not just the
4608 recipient address. There doesn't seem to be a real danger of callout loops,
4609 since a callout by the remote host to check the sender would use <>.
4610 [SEE ABOVE: changed after hitting problems.]
4612 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4613 temporary errors. However, in the case of such a code being given after
4614 the end of a data transmission (i.e. after ".") Exim was failing to write
4615 a retry record for the message. (Yes, there was some broken host that was
4616 actually sending 8xx at this point.)
4618 73. An unknown lookup type in a host list could cause Exim to panic-die when
4619 the list was checked. (An example that provoked this was putting <; in the
4620 middle of a list instead of at the start.) If this happened during a DATA
4621 ACL check, a -D file could be left lying around. This kind of configuration
4622 error no longer causes Exim to die; instead it causes a defer errror. The
4623 incident is still logged to the main and panic logs.
4625 74. Buglet left over from Exim 3 conversion. The message "too many messages
4626 in one connection" was written to the rejectlog but not the mainlog, except
4627 when address rewriting (yes!) was being logged.
4629 75. Added write_rejectlog option.
4631 76. When a system filter was run not as root (that is, when system_filter_user
4632 was set), the values of the $n variables were not being returned to the
4633 main process; thus, they were not subsequently available in the $sn
4636 77. Added +return_path_on_delivery log selector.
4638 78. A connection timeout was being treated differently from recipients deferred
4639 when testing hosts_max_try with a message that was older than the host's
4640 retry timeout. (The host should not be counted, thus allowing all hosts to
4641 be tried at least once before bouncing.) This may have been the cause of an
4642 occasionally reported bug whereby a message would remain on the queue
4643 longer than the retry timeout, but would be bounced if a delivery was
4644 forced. I say "may" because I never totally pinned down the problem;
4645 setting up timeout/retry tests is difficult. See also the next item.
4647 79. The ultimate address timeout was not being applied to errors that involved
4648 a combination of host plus message (for example, a timeout on a MAIL
4649 command). When an address resolved to a number of possible hosts, and they
4650 were not all tried for each delivery (e.g. because of hosts_max_try), a
4651 message could remain on the queue longer than the retry timeout.
4653 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4656 81. Fixed an obscure SMTP outgoing bug which required at least the following
4657 conditions: (a) there was another message waiting for the same server;
4658 (b) the server returned 5xx to all RCPT commands in the first message so
4659 that the message was not completed; (c) the server dropped the connection
4660 or gave a negative response to the RSET that Exim sends to abort the
4661 transaction. The observed case was a dropped connection after DATA that had
4662 been sent in pipelining mode. That is, the server had advertised PIPELINING
4663 but was not implementing it correctly. The effect of the bug was incorrect
4664 behaviour, such as trying another host, and this could lead to a crash.
4670 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4671 and daemon.c were passed as pointers to ints; they should have been
4672 pointers to socklen_t variables (which are typically unsigned ints).
4674 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4677 3. Fixed a really odd bug that affected only the testing scheme; patching a
4678 certain fixed string in the binary changed the value of another string that
4679 happened to be identical to the end of the original first string.
4681 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4682 name", it returns that address as the IP address. On some operating
4683 systems (e.g. Solaris), it also passes back the IP address string as the
4684 "host name". However, on others (e.g. Linux), it passes back an empty
4685 string. Exim wasn't checking for this, and was changing the host name to an
4686 empty string, assuming it had been canonicized.
4688 5. Although rare, it is permitted to have more than one PTR record for a given
4689 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4690 all the names associated with an address, because they do in Solaris.
4691 However, it seems that they do not in Linux for data that comes from the
4692 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4693 I found this out when I moved to a new Linux workstation and tried to run
4694 the Exim test suite.
4696 To get round this problem I have changed the code so that it now does its
4697 own call to the DNS to look up PTR records when searching for a host name.
4698 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4699 addresses that are only in /etc/hosts are still found.
4701 This behaviour is, however, controlled by an option called host_lookup_
4702 order, which defaults to "bydns:byaddr". If people want to use the other
4703 order, or indeed, just use one or the other means of lookup, they can
4704 specify it in this variable.
4706 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4707 some operating systems, this comes back from gethostbyaddr() as an empty
4708 string, and this is what Exim used to test for. However, it seems that in
4709 other systems, "." is yielded. Exim now tests for this case too.
4711 7. The values of check_spool_space and check_log_space are now held internally
4712 as a number of kilobytes instead of an absolute number of bytes. If a
4713 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4714 kilobyte. This means that much larger values can be stored.
4716 8. Exim monitor: an attempt to get the action menu when not actually pointing
4717 at a message produces an empty menu entitled "No message selected". This
4718 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4719 no entries in it ("Shell widget menu has zero width and/or height"). So I
4720 have added a single, blank menu entry in this case.
4722 9. Added ${quote_local_part.
4724 10. MIME decoding is now applied to the contents of Subject: header lines when
4727 11. Now that a reference to $sender_host_address automatically causes a reverse
4728 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4729 host lookup before query-style lookups in lists that might use this
4730 variable. This has therefore been abolished, and the "net-" prefix is no
4731 longer necessary for query-style lookups.
4733 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4734 have been a typo for LFLAGS, so it has been changed.
4736 13. The install script calls Exim with "-C /dev/null" in order to find the
4737 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4738 to be output. Howeve, since Exim outputs its version number before the
4739 error, it didn't break the script. It just looked ugly. I fixed this by
4740 always allowing "-C /dev/null" if the caller is root.
4742 14. Ignore overlarge ACL variable number when reading spool file - insurance
4743 against a later release with more variables having written the file.
4745 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4746 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4747 this, as well as the form without the "IPv6" on the front.
4749 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4750 OS/Makefile-Darwin file.
4752 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4753 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4755 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4756 variable. However, some OS use ints for inodes. I've added cast to long int
4757 to get rid of the compiler warning.
4759 19. I had forgotten to lock out "/../" in configuration file names when
4760 ALT_CONFIG_PREFIX was set.
4762 20. Routers used for verification do not need to specify transports. However,
4763 if such a router generated a host list, and callout was configured, Exim
4764 crashed, because it could not find a port number from the (non-existent)
4765 transport. It now assumes port 25 in this circumstance.
4767 21. Added the -t option to exigrep.
4769 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4770 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4771 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4772 them is set, LOOKUP_LSEARCH is forced.
4774 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4776 24. Added sender and host information to the "rejected by local_scan()" log
4777 line; previously there was no indication of these.
4779 25. Added .include_if_exists.
4781 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4782 Linux. It turns out that not all file systems support this. Apparently some
4783 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4784 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4785 not supported on the file descriptor, is now ignored when Exim is trying to
4786 sync a directory. This applies only to Linux.
4788 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4790 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4791 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4794 29. Added support for maildirsize files from supplied patch (modified a bit).
4796 30. The use of :fail: followed by an empty string could lead Exim to respond to
4797 sender verification failures with (e.g.):
4799 550 Verification failed for <xxx>
4800 550 Sender verify failed
4802 where the first response line was missing the '-' that indicates it is not
4803 the final line of the response.
4805 31. The loop for finding the name of the user that called Exim had a hardwired
4806 limit of 10; it now uses the value of finduser_retries, which is used for
4807 all other user lookups.
4809 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4812 33. Exim was neglecting to zero errno before one call of strtol() when
4813 expanding a string and expecting an integer value. On some systems this
4814 resulted in spurious "integer overflow" errors. Also, it was casting the
4815 result into an int without checking.
4817 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4818 did not work. The code looks as if it has *never* worked, though it appears
4819 to have been documented since at least releast 1.62. I have made it work.
4821 35. The "timeout_DNS" error in retry rules, also documented since at least
4822 1.62, also never worked. As it isn't clear exactly what this means, and
4823 clearly it isn't a major issue, I have abolished the feature by treating it
4824 as "timeout", and writing a warning to the main and panic logs.
4826 36. The display of retry rules for -brt wasn't always showing the error code
4829 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4830 timeout_connect_A, timeout_connect_MX.
4832 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4833 to the empty sender.
4835 39. The daemon was not analysing the content of -oX till after it had closed
4836 stderr and disconnected from the controlling terminal. This meant that any
4837 syntax errors were only noted on the panic log, and the return code from
4838 the command was 0. By re-arranging the code a little, I've made the
4839 decoding happen first, so such errors now appear on stderr, and the return
4840 code is 1. However, the actual setting up of the sockets still happens in
4841 the disconnected process, so errors there are still only recorded on the
4844 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4845 connections (as happens on some IP stacks) was logged at start up time as
4846 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4847 it from "IPv6 and IPv4", which means that two separate sockets are being
4850 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4851 says whether AF_INET or AF_INET6 was passed as an argument.
4853 42. Exiwhat output was messed up when time zones were included in log
4856 43. Exiwhat now gives more information about the daemon's listening ports,
4857 and whether -tls-on-connect was used.
4859 44. The "port" option of the smtp transport is now expanded.
4861 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4862 silently ignored. Now an error message is written to the main and panic
4865 46. There's a new ACL modifier called "logwrite" which writes to a log file
4866 as soon as it is encountered.
4868 47. Added $local_user_uid and $local_user_gid at routing time.
4870 48. Exim crashed when trying to verify a sender address that was being
4873 49. Exim was recognizing only a space character after ".include". It now also
4874 recognizes a tab character.
4876 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4877 extracting the relevant information from the specification. The man page no
4878 longer contains scrambled data for the -d option, and I've added a section
4879 at the front about calling Exim under different names.
4881 51. Added "extra_headers" argument to the "mail" command in filter files.
4883 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4886 53. Installed eximstats 1.29.
4888 54. Added transport_filter_timeout as a generic transport option.
4890 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4891 Cc: header lines. This was required by RFC 822, but it not required by RFC
4894 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4895 incoming messages that did not have them. Now it does so only if the
4896 message originates locally, that is, if there is no associated remote host
4897 address. When Resent- header lines are present, this applies to the Resent-
4898 lines rather than the non-Resent- lines.
4900 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4901 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4903 58. Messages for configuration errors now include the name of the main
4904 configuration file - useful now that there may be more than one file in a
4905 list (.included file names were always shown).
4907 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4908 for those rare installations that do not start the daemon as root or run it
4909 setuid root. I've cut out the call to initgroups() if the daemon is not
4912 60. The Exim user and group can now be bound into the binary as text strings
4913 that are looked up at the start of Exim's processing.
4915 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4917 62. Added $mailstore_basename variable.
4919 63. Installed patch to sieve.c from Michael Haardt.
4921 64. When Exim failed to open the panic log after failing to open the main log,
4922 the original message it was trying to log was written to stderr and debug
4923 output, but if they were not available (the usual case in production), it
4924 was lost. Now it is written to syslog before the two lines that record the
4925 failures to open the logs.
4927 65. Users' Exim filters run in subprocesses under the user's uid. It is
4928 possible for a "deliver" command or an alias in a "personal" command to
4929 provoke an address rewrite. If logging of address rewriting is configured,
4930 this fails because the process is not running as root or exim. There may be
4931 a better way of dealing with this, but for the moment (because 4.30 needs
4932 to be released), I have disabled address rewrite logging when running a
4933 filter in a non-root, non-exim process.
4939 1. The buildconfig auxiliary program wasn't quoting the value set for
4940 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4941 not defined. This bug was masked in 4.22 by the effect that was fixed in
4944 2. Some messages that were rejected after a message id was allocated were
4945 shown as "incomplete" by exigrep. It no longer does this for messages that
4946 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4948 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4949 have allow_domain_literals set, the ID did not get logged in the <= line.
4950 Domain literals are now always recognized in Message-ID: header lines.
4952 4. The first argument for a ${extract expansion item is the key name or field
4953 number. Leading and trailing spaces in this item were not being ignored,
4954 causing some misleading effects.
4956 5. When deliver_drop_privilege was set, single queue runner processes started
4957 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4958 same command in the process it spins off) were not dropping privilege.
4960 6. When the daemon running as "exim" started a queue runner, it always
4961 re-executed Exim in the spun-off process. This is a waste of effort when
4962 deliver_drop_privilege is set. The new process now just calls the
4963 queue-runner function directly.
4969 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4972 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4973 ignored. Though the use of -oP was forcing the writing of a pid file, it
4974 was always written to the default place.
4976 3. If the message "no IP address found for host xxxx" is generated during
4977 incoming verification, it is now followed by identification of the incoming
4978 connection (so you can more easily find what provoked it).
4980 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4982 5. Added some features to "harden" Exim a bit more against certain attacks:
4984 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4985 be put in Local/Makefile. This is like the never_users runtime option,
4986 but it cannot be overridden. The default setting is "root".
4988 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4989 prefix string with which any file named in a -C command line option
4992 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4993 is retained for -C and -D only if the caller of Exim is root. Without
4994 it, the exim user may also use -C and -D and retain privilege.
4996 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4997 command line option is disabled.
4999 6. Macro names set by the -D option must start with an upper case letter, just
5000 like macro names defined in the configuration file.
5002 7. Added "dereference=" facility to LDAP.
5004 8. Two instances of the typo "uknown" in the source files are fixed.
5006 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5007 the Configure-Makefile script screwed up while processing it.
5009 10. Incorporated PCRE 4.4.
5011 11. The SMTP synchronization check was not operating right at the start of an
5012 SMTP session. For example, it could not catch a HELO sent before the client
5013 waited for the greeting. There is now a check for outstanding input at the
5014 point when the greeting is written. Because of the duplex, asynchronous
5015 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5016 way, but not yet received, when the check is performed.
5018 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5019 on TCP/IP sockets, because this apparently causes some broken clients to
5022 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5023 unchanged) from the Cygwin maintainer.
5025 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5026 was supported instead of testing for mbx. Effectively a typo.
5028 15. The spa authenticator server code was not checking that the input it
5029 received was valid base64.
5031 16. The debug output line for the "set" modifier in ACLs was not showing the
5032 name of the variable that was being set.
5034 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5036 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5037 lookup on its own. Something else was needed to trigger the lookup. For
5038 example, a match in host_lookup or the need for a host name in a host list.
5039 Now, if $sender_host_name is referenced and the host name has not yet been
5040 looked up, a lookup is performed. If the lookup fails, the variable remains
5041 empty, and $host_lookup_failed is set to "1".
5043 19. Added "eqi" as a case-independent comparison operator.
5045 20. The saslauthd authentication condition could segfault if neither service
5046 nor realm was specified.
5048 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5049 error message that was logged was misleading, and incoming SMTP
5050 connections were dropped. The message is now more accurate, and temporary
5051 errors are given to SMTP connections.
5053 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5054 (except RSET) with a 421 error, until QUIT is received. However, it was
5055 failing to send a response to QUIT.
5057 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5058 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5059 ACL is now run after the helo_try_verify_hosts code.
5061 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5062 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5063 case-independent, so other case variants are also recognized). Apparently
5064 some systems use these upper case variants.
5066 25. If more than two messages were waiting for the same host, and a transport
5067 filter was specified for the transport, Exim sent two messages over the
5068 same TCP/IP connection, and then failed with "socket operation on non-
5069 socket" when it tried to send the third.
5071 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5073 27. The extern definition of crypt16() in expand.c was not being excluded when
5074 the OS had its own crypt16() function.
5076 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5077 as a preferred synonym for return_size_limit, both as an option and as an
5080 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5082 30. Changed the default configuration ACL to relax the local part checking rule
5083 for addresses that are not in any local domains. For these addresses,
5084 slashes and pipe symbols are allowed within local parts, but the sequence
5085 /../ is explicitly forbidden.
5087 31. SPA server authentication was not clearing the challenge buffer before
5090 32. log_message in a "warn" ACL statement was writing to the reject log as
5091 well as to the main log, which contradicts the documentation and doesn't
5092 seem right (because no rejection is happening). So I have stopped it.
5094 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5095 However, I am unable to do any testing of this.
5097 34. Fixed an infelicity in the appendfile transport. When checking directories
5098 for a mailbox, to see if any needed to be created, it was accidentally
5099 using path names with one or more superfluous leading slashes; tracing
5100 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5102 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5103 contents are added to the log line that is written for every discarded
5104 recipient. (Previously a log_message setting was ignored.)
5106 36. The ${quote: operator now quotes the string if it is empty.
5108 37. The install script runs exim in order to find its version number. If for
5109 some reason other than non-existence or emptiness, which it checks, it
5110 could not run './exim', it was installing it with an empty version number,
5111 i.e. as "exim-". This error state is now caught, and the installation is
5114 38. An argument was missing from the function that creates an error message
5115 when Exim fails to connect to the socket for saslauthd authentication.
5116 This could cause Exim to crash, or give a corrupted message.
5118 39. Added isip, isip4, and isip6 to ${if conditions.
5120 40. The ACL variables $acl_xx are now saved with the message, and can be
5121 accessed later in routers, transports, and filters.
5123 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5124 strings in the file are not string-expanded.
5126 42. If a MAIL command specified a SIZE value that was too large to fit into an
5127 int variable, the check against message_size_limit failed. Such values are
5128 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5129 day this will have to be increased, but I don't think I want to be around
5130 when emails are that large.
5137 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5138 iconv() is not standard in FreeBSD.
5140 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5141 IPv6 enabled. The observed symptom was a segmentation fault on return from
5142 the function os_common_find_running_interfaces() in src/os.c.
5144 3. In the check_special_case() function in daemon.c I had used "errno" as an
5145 argument name, which causes warnings on some systems. This was basically a
5146 typo, since it was named "eno" in the comments!
5148 4. The code that waits for the clock to tick (at a resolution of some fraction
5149 of a second) so as to ensure message-id uniqueness was always waiting for
5150 at least one whole tick, when it could have waited for less. [This is
5151 almost certainly not relevant at current processor speeds, where it is
5152 unlikely to ever wait at all. But we try to future-proof.]
5154 5. The function that sleeps for a time interval that includes fractions of a
5155 second contained a race. It did not block SIGALRM between setting the
5156 timer, and suspending (a couple of lines later). If the interval was short
5157 and the sigsuspend() was delayed until after it had expired, the suspension
5158 never ended. On busy systems this could lead to processes getting stuck for
5161 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5162 process, before it forks any delivery processes. The open lookup caching
5163 mechanism meant that the open file or database connection was passed into
5164 the delivery process. The problem was that delivery processes always tidy
5165 up cached lookup data. This could cause a problem for the next delivery
5166 process started by the queue runner, because the external queue runner
5167 process does not know about the closure. So the next delivery process
5168 still has data in the lookup cache. In the case of a file lookup, there was
5169 no problem because closing a file descriptor in a subprocess doesn't affect
5170 the parent. However, if the lookup was caching a connection to a database,
5171 the connection was closed, and the second delivery process was likely to
5172 see errors such as "PGSQL: query failed: server closed the connection
5173 unexpectedly". The problem has been fixed by closing all cached lookups
5174 in a queue runner before running a delivery process.
5176 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5177 seem to have the "const" qualifier which it has on other OS. I've
5180 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5181 *of the same type* (client or server) with the same public name that an
5182 error should be diagnosed.
5184 9. When Exim looked up a host name for an IP address, but failed to find the
5185 original IP address when looking up the host name (a safety check), it
5186 output the message "<ip address> does not match any IP for NULL", which was
5187 confusing, to say the least. The bug was that the host name should have
5188 appeared instead of "NULL".
5190 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5191 user that is built into the binary, and the -C or -D options is used, root
5192 privilege is dropped before the configuration file is read. In addition,
5193 logging is switched to stderr instead of the normal log files. If the
5194 configuration then re-defines the Exim user, the unprivileged environment
5195 is probably not what is expected, so Exim logs a panic warning message (but
5198 However, if deliver_drop_privilege is set, the unprivileged state may well
5199 be exactly what is intended, so the warning has been cut out in that case,
5200 and Exim is allowed to try to write to its normal log files.
5206 1. smtp_return_error_details was not giving details for temporary sender
5207 or receiver verification errors.
5209 2. Diagnose a configuration error if two authenticators have the same public
5212 3. Exim used not to create the message log file for a message until the first
5213 delivery attempt. This could be confusing when incoming messages were held
5214 for policy or load reasons. The message log file is now created at the time
5215 the message is received, and an initial "Received" line is written to it.
5217 4. The automatically generated man page for command line options had a minor
5218 bug that caused no ill effects; however, a more serious problem was that
5219 the procedure for building the man page automatically didn't always
5220 operate. Consequently, release 4.20 contains an out-of-date version. This
5221 shouldn't happen again.
5223 5. When building Exim with embedded Perl support, the script that builds the
5224 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5225 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5227 6. The freeze_tell option was not being used for messages that were frozen on
5228 arrival, either by an ACL or by local_scan().
5230 7. Added the smtp_incomplete_transaction log selector.
5232 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5233 was accepting AUTH without a new EHLO.
5235 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5236 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5239 10. Logging of TCP/IP connections (when configured) now happens in the main
5240 daemon process instead of the child process, so that the TCP/IP connection
5241 count is more accurate (but it can never be perfect).
5243 11. The use of "drop" in a nested ACL was not being handled correctly in the
5244 outer ACL. Now, if condition failure induced by the nested "drop" causes
5245 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5246 or "require"), the connection is dropped.
5248 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5249 that yield "discard" can now be used with an "accept" or a "discard" verb,
5250 but an error is generated for any others (because I can't see a useful way
5251 to define what should happen).
5253 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5254 are now processed in the same way as lines in the Exim configuration file.
5255 In particular, continuation lines are supported.
5257 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5259 15. Added -ti meaning -t -i.
5261 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5262 domains, and warn by logging if others are found.
5264 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5265 returned from GIFCONF when Exim is trying to find the list of interfaces on
5266 a host. The code in os.c has been modified to copy each ifreq to an aligned
5267 structure in all cases.
5269 Also, in some cases, the returned ifreq's were being copied to a 'struct
5270 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5271 means the last couple of bytes of an IPv6 address could be chopped if the
5272 ifreq contained only a normal sockaddr (14 bytes storage).
5274 18. Named domain lists were not supported in the hosts_treat_as_local option.
5275 An entry such as +xxxx was not recognized, and was treated as a literal
5278 19. Ensure that header lines added by a DATA ACL are included in the reject log
5279 if the ACL subsequently rejects the message.
5281 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5282 MD5 (which is deprecated).
5284 21. When testing a filter file using -bf, Exim was writing a message when it
5285 took the sender from a "From " line in the message, but it was not doing so
5286 when it took $return_path from a Return-Path: header line. It now does.
5288 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5289 with a valid header line field name (a series of printing characters
5290 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5292 23. Changed "disc" in the source to "disk" to conform to the documentation and
5293 the book and for uniformity.
5295 24. Ignore Sendmail's -Ooption=value command line item.
5297 25. When execve() failed while trying to run a command in a pipe transport,
5298 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5299 could be confused with a return value of 69 from the command itself. This
5300 has been changed to 127, the value the shell returns if it is asked to run
5301 a non-existent command. The wording for the related log line suggests a
5302 non-existent command as the problem.
5304 26. If received_header_text expands to an empty string, do not add a Received:
5305 header line to the message. (Well, it adds a token one on the spool, but
5306 marks it "old" so that it doesn't get used or transmitted.)
5308 27. Installed eximstats 1.28 (addition of -nt option).
5310 28. There was no check for failure on the call to getsockname() in the daemon
5311 code. This can fail if there is a shortage of resources on the system, with
5312 ENOMEM, for example. A temporary error is now given on failure.
5314 29. Contrary to the C standard, it seems that in some environments, the
5315 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5316 program. Exim now does this explicitly; it affects the formatting of
5317 timestamps using strftime().
5319 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5320 complaints. I've now initialized all the variables, to avoid this.
5322 32. Header lines added by a system filter were not being "seen" during
5323 transport-time rewrites.
5325 33. The info_callback() function passed to OpenSSL is set up with type void
5326 (*)(SSL *, int, int), as described somewhere. However, when calling the
5327 function (actually a macro) that sets it up, the type void(*)() is
5328 expected. I've put in a cast to prevent warnings from picky compilers.
5330 34. If a DNS black list lookup found a CNAME record, but there were no A
5331 records associated with the domain it pointed at, Exim crashed.
5333 35. If a DNS black list lookup returned more than one A record, Exim ignored
5334 all but the first. It now scans all returned addresses if a particular IP
5335 value is being sought. In this situation, the contents of the
5336 $dnslist_value variable are a list of all the addresses, separated by a
5339 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5340 to accept a host name and all its aliases if the forward lookup for any of
5341 them yielded the IP address of the incoming connection. Now it accepts only
5342 those names whose forward lookup yields the correct IP address. Any other
5343 names are discarded. This closes a loophole whereby a rogue DNS
5344 administrator could create reverse DNS records to break through a
5345 wildcarded host restriction in an ACL.
5347 37. If a user filter or a system filter that ran in a subprocess used any of
5348 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5349 the wrong values were passed to the pipe command ($thisaddress had the
5350 value of $0, $0 had the value of $1, etc). This bug was introduced by
5351 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5353 38. Improved the line breaking for long SMTP error messages from ACLs.
5354 Previously, if there was no break point between 40 and 75 characters, Exim
5355 left the rest of the message alone. Two changes have been made: (a) I've
5356 reduced the minimum length to 35 characters; (b) if it can't find a break
5357 point between 35 and 75 characters, it looks ahead and uses the first one
5358 that it finds. This may give the occasional overlong line, but at least the
5359 remaining text gets split now.
5361 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5362 file descriptors might be low, and that setting 1000 would always raise it.
5363 It turns out that in some environments, the limit is already over 1000 and
5364 that lowering it causes trouble. So now Exim takes care not to decrease it.
5366 40. When delivering a message, the value of $return_path is set to $sender_
5367 address at the start of routing (routers may change the value). By an
5368 oversight, this default was not being set up when an address was tested by
5369 -bt or -bv, which affected the outcome if any router or filter referred to
5372 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5373 log only when "message" or "log_message" are set. However, if one of the
5374 conditions was an address verification, or a call to a nested ACL, the
5375 messages generated by the underlying test were being passed through. This
5376 no longer happens. The underlying message is available in $acl_verify_
5377 message for both "message" and "log_message" expansions, so it can be
5378 passed through if needed.
5380 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5381 new expansion $bh_ to give the encoded byte string without charset
5382 translation. Translation happens only if iconv() is available; HAVE_ICONV
5383 indicates this at build time. HEADERS_CHARSET gives the charset to
5384 translate to; headers_charset can change it in the configuration, and
5385 "headers charset" can change it in an individual filter file.
5387 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5388 that creates RFC 2047 encoded "words" labels them as that charset instead
5389 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5390 expansion operator; (ii) when Exim creates a From: line for a local
5391 message; (iii) when a header line is rewritten to include a "phrase" part.
5393 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5394 buggy, causing it to skip the first lines of messages whose message ID
5395 ended in 'D'. This would not have bitten before Exim release 4.14, because
5396 message IDs were unlikely to end in 'D' before then. The effect was to have
5397 incorrect size information for certain domains.
5399 45. #include "config.h" was missing at the start of the crypt16.c module. This
5400 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5403 46. If there was a timeout during a "random" callout check, Exim treated it as
5404 a failure of the random address, and carried on sending RSET and the real
5405 address. If the delay was just some slowness somewhere, the response to the
5406 original RCPT would be taken as a response to RSET and so on, causing
5407 mayhem of various kinds.
5409 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5410 when I implemented it. It didn't allow for the fact that some option values
5411 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5412 the right test for positive values.
5414 48. Domain names in DNS records are case-independent. Exim always looks them up
5415 in lower case. Some resolvers return domain names in exactly the case they
5416 appear in the zone file, that is, they may contain uppercase letters. Not
5417 all resolvers do this - some return always lower case. Exim was treating a
5418 change of case by a resolver as a change of domain, similar to a widening
5419 of a domain abbreviation. This triggered its re-routing code and so it was
5420 trying to route what was effectively the same domain again. This normally
5421 caused routing to fail (because the router wouldn't handle the domain
5422 twice). Now Exim checks for this case specially, and just changes the
5423 casing of the domain that it ultimately uses when it transmits the message
5426 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5429 50. If a filter generated a file delivery with a non-absolute name (possible if
5430 no home directory exists for the router), the forbid_file option was not
5433 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5434 the existing equality matching.
5436 52. Exim was using ints instead of ino_t variables in some places where it was
5437 dealing with inode numbers.
5439 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5440 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5441 called TMPDIR, and if it finds it is different, it changes its value.
5443 54. The smtp_printf() function is now made available to local_scan() so
5444 additional output lines can be written before returning. There is also an
5445 smtp_fflush() function to enable the detection of a dropped connection.
5446 The variables smtp_input and smtp_batched_input are exported to
5449 55. Changed the default runtime configuration: the message "Unknown user"
5450 has been removed from the ACL, and instead placed on the localuser router,
5451 using the cannot_route_message feature. This means that any verification
5452 failures that generate their own messages won't get overridden. Similarly,
5453 the "Unrouteable address" message that was in the ACL for unverifiable
5454 relay addresses has also been removed.
5456 56. Added hosts_avoid_esmtp to the smtp transport.
5458 57. The exicyclog script was not checking for the esoteric option
5459 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5460 will work only if exicyclog is run under the appropriate euid.
5462 58. Following a discussion on the list, the rules by which Exim recognises line
5463 endings on incoming messages have been changed. The -dropcr and drop_cr
5464 options are now no-ops, retained only for backwards compatibility. The
5465 following line terminators are recognized: LF CRLF CR. However, special
5466 processing applies to CR:
5468 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5469 nor a local message in the state where . is a terminator.
5471 (ii) If a bare CR is encountered in a header line, an extra space is added
5472 after the line terminator so as not to end the header. The reasoning
5473 behind this is that bare CRs in header lines are most likely either
5474 to be mistakes, or people trying to play silly games.
5476 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5477 was being incorrectly given as 18 bytes larger than it should have been.
5478 This is a VOB (very old bug).
5480 60. This may never have affected anything current, but just in case it has:
5481 When the local host is found other than at the start of a list of hosts,
5482 the local host, those with the same MX, and any that follow, are discarded.
5483 When the list in question was part of a longer list of hosts, the following
5484 hosts (not currently being processed) were also being discarded. This no
5485 longer happens. I'm not sure if this situation could ever has previously
5488 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5491 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5492 header. This is something that is recommended in a new Internet Draft, and
5493 is something that is documented as being done by Sendmail. There are two
5494 possible values. For messages generated by the autoreply transport, Exim
5497 Auto-Submitted: auto-replied
5499 whereas for all other generated messages (e.g. bounces) it adds
5501 Auto-Submitted: auto-generated
5503 63. The "personal" condition in filters now includes a test for the
5504 Auto-Submitted: header. If it contains the string "auto-" the message it
5505 not considered personal.
5507 64. Added rcpt_include_affixes as a generic transport option.
5509 65. Added queue_only_override (default true).
5511 66. Added the syslog_duplication option.
5513 67. If what should have been the first header line of a message consisted of
5514 a space followed by a colon, Exim was mis-interpreting it as a header line.
5515 It isn't of course - it is syntactically invalid and should therefore be
5516 treated as the start of the message body. The misbehaviour could have
5517 caused a number of strange effects, including loss of data in subsequent
5518 header lines, and spool format errors.
5520 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5521 client host had authenticated. This control can now be exercised by an ACL
5522 for more flexibility.
5524 69. By default, callouts do not happen when testing with -bh. There is now a
5525 variant, -bhc, which does actually run the callout code, including
5526 consulting and updating the callout cache.
5528 70. Added support for saslauthd authentication, courtesy of Alexander
5531 71. If statvfs() failed on the spool or log directories while checking their
5532 size for availability, Exim confusingly gave the error "space shortage".
5533 Furthermore, in debugging mode it crashed with a floating point exception.
5534 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5535 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5536 serious problem, Exim now writes to the main and panic logs when this
5537 happens, with details of the failure. It then refuses to accept the
5538 incoming message, giving the message "spool directory problem" or "log
5539 directory problem" with a 421 code for SMTP messages.
5541 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5542 0, 1, and 2 exist, because some OS complain for execs without them (see
5543 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5544 descriptors. However, the code omitted to check that the open succeeded,
5545 causing mysterious errors if for some reason the permissions on /dev/null
5546 got screwed. Now Exim writes a message to the main and panic logs, and
5547 bombs out if it can't open /dev/null.
5549 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5550 interact so that it is all more flexible. It is supposed to remain
5551 backwards compatible. Also added extra_local_interfaces.
5553 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5554 to bomb out with an assertion failure - to the client this appears as a
5555 connection drop. This problem occurs in the part of the code that was taken
5556 from the Samba project. Fortunately, the assertion is in a very simple
5557 function, so I have fixed this by reproducing the function inline in the
5558 one place where it is called, and arranging for authentication to fail
5559 instead of killing the process with assert().
5561 75. The SPA client code was not working when the server requested OEM rather
5562 than Unicode encoding.
5564 76. Added code to make require_files with a specific uid setting more usable in
5565 the case where statting the file as root fails - usually a non-root-mounted
5566 NFS file system. When this happens and the failure is EACCES, Exim now
5567 forks a subprocess and does the per-uid checking as the relevant uid.
5569 77. Added process_log_path.
5571 78. If log_file_path was not explicitly set, a setting of check_log_space or
5572 check_log_inodes was ignored.
5574 79. If a space check for the spool or log partitions fails, the incident is now
5575 logged. Of course, in the latter case the data may get lost...
5577 80. Added the %p formatting code to string_format() so that it can be used to
5578 print addresses in debug_print(). Adjusted all the address printing in the
5579 debugging in store.c to use %p rather than %d.
5581 81. There was a concern that a line of code in smtp_in.c could overflow a
5582 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5583 initially expressed, the concern was not well-founded, because trailing
5584 spaces are removed early. However, if the trailing spaces were followed by
5585 a NULL, they did not get removed, so the overflow was possible. Two fixes
5588 (a) I re-wrote the offending code in a cleaner fashion.
5589 (b) If an incoming SMTP command contains a NULL character, it is rejected
5592 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5593 runs initgroups(), so that if the Exim user is in any additional groups,
5594 they will be used during message reception.
5600 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob