1 Change log file for Exim from version 4.21
2 -------------------------------------------
7 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
13 PP/01 Handle short writes when writing local log-files.
14 In practice, only affects FreeBSD (8 onwards).
15 Bugzilla 1053, with thanks to Dmitry Isaikin.
17 NM/01 Bugzilla 949 - Documentation tweak
19 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
22 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
24 PP/02 Implemented gsasl authenticator.
26 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
28 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
29 `pkg-config foo` for cflags/libs.
31 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
32 with rest of GSASL and with heimdal_gssapi.
34 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
35 `pkg-config foo` for cflags/libs for the TLS implementation.
37 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
38 properties get this fed in as external SSF. A number of robustness
39 and debugging improvements to the cyrus_sasl authenticator.
41 PP/08 cyrus_sasl server now expands the server_realm option.
43 PP/09 Bugzilla 1214 - Log authentication information in reject log.
44 Patch by Jeremy Harris.
46 PP/10 Added dbmjz lookup type.
48 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
50 PP/12 MAIL args handles TAB as well as SP, for better interop with
51 non-compliant senders.
52 Analysis and variant patch by Todd Lyons.
54 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
55 Bug report from Lars Müller <lars@samba.org> (via SUSE),
56 Patch from Dirk Mueller <dmueller@suse.com>
58 PP/13 tls_peerdn now print-escaped for spool files.
59 Observed some $tls_peerdn in wild which contained \n, which resulted
60 in spool file corruption.
62 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
63 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
64 or write after TLS renegotiation, which otherwise led to messages
67 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
68 as a tracking header (ie: a signed header comes before the signature).
69 Patch from Wolfgang Breyha.
71 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
72 comma-sep list; embedded commas doubled.
74 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
76 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
78 Report and patch from Dmitry Banschikov.
80 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
81 Removed SSL_clear() after SSL_new() which led to protocol negotiation
82 failures. We appear to now support TLS1.1+ with Exim.
84 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
85 lets Exim select keys and certificates based upon TLS SNI from client.
86 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
87 before an outbound SMTP session. New log_selector, +tls_sni.
89 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
90 NULL dereference. Report and patch from Alun Jones.
92 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
93 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
94 Not seeing resolver debug output on NetBSD, but suspect this is a
95 resolver implementation change.
97 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
98 Left warnings. Added "eximon gdb" invocation mode.
100 PP/21 Defaulting "accept_8bitmime" to true, not false.
102 PP/22 Added -bw for inetd wait mode support.
104 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
105 locate the relevant includes and libraries. Made this the default.
107 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
108 Bugzilla 1246, report and most of solution from Tomasz Kusy.
110 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
111 This may cause build issues on older platforms.
113 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
114 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
115 gnutls_require_mac & gnutls_require_protocols (no longer supported).
116 Added SNI support via GnuTLS too.
117 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
119 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
121 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
122 Applied second patch from Janne, implementing suggestion to default
123 multiple-strings-in-record handling to match SPF spec.
125 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
127 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
128 read-only, out of scope).
129 Patch from Wolfgang Breyha, report from Stuart Northfield.
131 PP/29 Fix three issues highlighted by clang analyser static analysis.
132 Only crash-plausible issue would require the Cambridge-specific
133 iplookup router and a misconfiguration.
134 Report from Marcin Mirosław.
136 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
138 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
139 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
140 As part of this, removing so much warning spew let me fix some minor
141 real issues in debug logging.
143 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
144 assignment on my part. Fixed.
146 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
147 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
148 Janne Snabb (who went above and beyond: thank you).
150 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
151 string otherwise requires a connection and a bunch more work and it's
152 relatively easy to get wrong. Should also expose TLS library linkage
155 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
156 64-bit ${eval} (JH/03).
158 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
159 GNU libc to support some of the 64-bit stuff, should not lead to
160 conflicts. Defined before os.h is pulled in, so if a given platform
161 needs to override this, it can.
163 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
164 protection layer was required, which is not implemented.
165 Bugzilla 1254, patch from Wolfgang Breyha.
167 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
168 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
169 tls_dhparam take prime identifiers. Also unbreak combination of
170 OpenSSL+DH_params+TLSSNI.
172 PP/39 Disable SSLv2 by default in OpenSSL support.
178 PP/01 Solaris build fix for Oracle's LDAP libraries.
179 Bugzilla 1109, patch from Stephen Usher.
181 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
183 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
186 TF/02 Fix a couple more cases where we did not log the error message
187 when unlink() failed. See also change 4.74-TF/03.
189 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
190 lock up or crash if it happened to be inside a call to libc when it
191 got a SIGUSR1 from exiwhat.
193 The SIGUSR1 handler appends the current process status to the process
194 log which is later printed by exiwhat. It used to use the general
195 purpose logging code to do this, but several functions it calls are
196 not safe for signals.
198 The new output code in the SIGUSR1 handler is specific to the process
199 log, and simple enough that it's easy to inspect for signal safety.
200 Removing some special cases also simplifies the general logging code.
201 Removing the spurious timestamps from the process log simplifies
204 TF/04 Improved ratelimit ACL condition.
206 The /noupdate option has been deprecated in favour of /readonly which
207 has clearer semantics. The /leaky, /strict, and /readonly update modes
208 are mutually exclusive. The update mode is no longer included in the
209 database key; it just determines when the database is updated. (This
210 means that when you upgrde Exim will forget old rate measurements.)
212 Exim now checks that the per_* options are used with an update mode that
213 makes sense for the current ACL. For example, when Exim is processing a
214 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
215 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
216 must specify per_mail/readonly. If you omit the update mode it defaults to
217 /leaky where that makes sense (as before) or /readonly where required.
219 The /noupdate option is now undocumented but still supported for
220 backwards compatibility. It is equivalent to /readonly except that in
221 ACLs where /readonly is required you may specify /leaky/noupdate or
222 /strict/noupdate which are treated the same as /readonly.
224 A useful new feature is the /count= option. This is a generalization
225 of the per_byte option, so that you can measure the throughput of other
226 aggregate values. For example, the per_byte option is now equivalent
227 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
229 The per_rcpt option has been generalized using the /count= mechanism
230 (though it's more complicated than the per_byte equivalence). When it is
231 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
232 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
233 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
234 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
235 Note that using per_rcpt with a non-readonly update mode in more than
236 one ACL will cause the recipients to be double-counted. (The per_mail
237 and per_byte options don't have this problem.)
239 The handling of very low rates has changed slightly. If the computed rate
240 is less than the event's count (usually one) then this event is the first
241 after a long gap. In this case the rate is set to the same as this event's
242 count, so that the first message of a spam run is counted properly.
244 The major new feature is a mechanism for counting the rate of unique
245 events. The new per_addr option counts the number of different
246 recipients that someone has sent messages to in the last time period. It
247 behaves like per_rcpt if all the recipient addresses are different, but
248 duplicate recipient addresses do not increase the measured rate. Like
249 the /count= option this is a general mechanism, so the per_addr option
250 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
251 example, measure the rate that a client uses different sender addresses
252 with the options per_mail/unique=$sender_address. There are further
253 details in the main documentation.
255 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
257 TF/06 Removed a few PCRE remnants.
259 TF/07 Automatically extract Exim's version number from tags in the git
260 repository when doing development or release builds.
262 PP/02 Raise smtp_cmd_buffer_size to 16kB.
263 Bugzilla 879. Patch from Paul Fisher.
265 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
266 Heavily based on revision 40f9a89a from Simon Arlott's tree.
269 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
271 PP/05 Variable $av_failed, true if the AV scanner deferred.
272 Bugzilla 1078. Patch from John Horne.
274 PP/06 Stop make process more reliably on build failure.
275 Bugzilla 1087. Patch from Heiko Schlittermann.
277 PP/07 Make maildir_use_size_file an _expandable_ boolean.
278 Bugzilla 1089. Patch from Heiko Schlittermann.
280 PP/08 Handle ${run} returning more data than OS pipe buffer size.
281 Bugzilla 1131. Patch from Holger Weiß.
283 PP/09 Handle IPv6 addresses with SPF.
284 Bugzilla 860. Patch from Wolfgang Breyha.
286 PP/10 GnuTLS: support TLS 1.2 & 1.1.
288 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
291 PP/11 match_* no longer expand right-hand-side by default.
292 New compile-time build option, EXPAND_LISTMATCH_RHS.
293 New expansion conditions, "inlist", "inlisti".
295 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
297 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
299 PP/14 fix log_write() format string regression from TF/03.
300 Bugzilla 1152. Patch from Dmitry Isaikin.
306 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
308 PP/02 Harmonised TLS library version reporting; only show if debugging.
309 Layout now matches that introduced for other libraries in 4.74 PP/03.
311 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
313 PP/04 New "dns_use_edns0" global option.
315 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
318 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
319 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
321 TK/01 Updated PolarSSL code to 0.14.2.
322 Bugzilla 1097. Patch from Andreas Metzler.
324 PP/07 Catch divide-by-zero in ${eval:...}.
327 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
330 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
331 format-string attack -- SECURITY: remote arbitrary code execution.
333 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
334 time unintentionally subject to list matching rules, letting the header
335 cause arbitrary Exim lookups (of items which can occur in lists, *not*
336 arbitrary string expansion). This allowed for information disclosure.
338 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
339 INT_MIN/-1 -- value coerced to INT_MAX.
345 NM/01 Workround for PCRE version dependency in version reporting
348 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
349 This fixes portability to compilers other than gcc, notably
350 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
352 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
353 makefiles for portability to HP-UX and POSIX correctness.
355 PP/01 Permit LOOKUP_foo enabling on the make command-line.
356 Also via indented variable definition in the Makefile.
357 (Debugging by Oliver Heesakkers).
359 PP/02 Restore caching of spamd results with expanded spamd_address.
360 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
362 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
363 Improves build reliability. Fix from: Frank Elsner
365 NM/02 Fix wide character breakage in the rfc2047 coding
366 Fixes bug 1064. Patch from Andrey N. Oktyabrski
368 NM/03 Allow underscore in dnslist lookups
369 Fixes bug 1026. Patch from Graeme Fowler
371 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
372 Code patches from Adam Ciarcinski of NetBSD.
374 NM/04 Fixed exiqgrep to cope with mailq missing size issue
377 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
378 is logged, to avoid truncation. Patch from John Horne.
380 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
381 Patch from Jakob Hirsch.
383 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
384 SQL string expansion failure details.
385 Patch from Andrey Oktyabrski.
387 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
388 Patch from Simon Arlott.
390 PP/09 New lookups functionality failed to compile on old gcc which rejects
391 extern declarations in function scope.
392 Patch from Oliver Fleischmann
394 PP/10 Use sig_atomic_t for flags set from signal handlers.
395 Check getgroups() return and improve debugging.
396 Fixed developed for diagnosis in bug 927 (which turned out to be
399 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
400 Patch from Mark Zealey.
402 PP/12 Bugzilla 1056: Improved spamd server selection.
403 Patch from Mark Zealey.
405 PP/13 Bugzilla 1086: Deal with maildir quota file races.
406 Based on patch from Heiko Schlittermann.
408 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
409 Patch from Uwe Doering, sign-off by Michael Haardt.
411 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
412 variable declaration deep within a block. Bug and patch from
415 PP/15 lookups-Makefile IRIX compatibilty coercion.
417 PP/16 Make DISABLE_DKIM build knob functional.
419 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
420 Patch by Simon Arlott
422 TF/03 Fix valgrind.h portability to C89 compilers that do not support
423 variable argument macros. Our copy now differs from upstream.
429 TF/01 Failure to get a lock on a hints database can have serious
430 consequences so log it to the panic log.
432 TF/02 Log LMTP confirmation messages in the same way as SMTP,
433 controlled using the smtp_confirmation log selector.
435 TF/03 Include the error message when we fail to unlink a spool file.
437 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
438 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
439 for maintaining out-of-tree patches for some time.
441 PP/01 Bugzilla 139: Documentation and portability issues.
442 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
443 Handle per-OS dynamic-module compilation flags.
445 PP/02 Let /dev/null have normal permissions.
446 The 4.73 fixes were a little too stringent and complained about the
447 permissions on /dev/null. Exempt it from some checks.
448 Reported by Andreas M. Kirchwitz.
450 PP/03 Report version information for many libraries, including
451 Exim version information for dynamically loaded libraries. Created
452 version.h, now support a version extension string for distributors
453 who patch heavily. Dynamic module ABI change.
455 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
456 privilege escalation vulnerability whereby the Exim run-time user
457 can cause root to append content of the attacker's choosing to
460 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
463 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
464 If dropping privileges for untrusted macros, we disabled normal logging
465 on the basis that it would fail; for the Exim run-time user, this is not
466 the case, and it resulted in successful deliveries going unlogged.
467 Fixed. Reported by Andreas Metzler.
473 PP/01 Date: & Message-Id: revert to normally being appended to a message,
474 only prepend for the Resent-* case. Fixes regression introduced in
475 Exim 4.70 by NM/22 for Bugzilla 607.
477 PP/02 Include check_rfc2047_length in configure.default because we're seeing
478 increasing numbers of administrators be bitten by this.
480 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
482 PP/03 Bugzilla 994: added openssl_options main configuration option.
484 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
486 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
488 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
490 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
491 without a peer certificate, leading to a segfault because of an
492 assumption that peers always have certificates. Be a little more
493 paranoid. Problem reported by Martin Tscholak.
495 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
496 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
497 NB: ClamAV planning to remove STREAM in "middle of 2010".
498 CL also introduces -bmalware, various -d+acl logging additions and
499 more caution in buffer sizes.
501 PP/09 Implemented reverse_ip expansion operator.
503 PP/10 Bugzilla 937: provide a "debug" ACL control.
505 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
507 PP/12 Bugzilla 973: Implement --version.
509 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
511 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
513 PP/15 Bugzilla 816: support multiple condition rules on Routers.
515 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
516 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
517 ignore trailing whitespace.
519 JJ/02 prevent non-panic DKIM error from being sent to paniclog
521 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
524 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
525 Notification from Dr Andrew Aitchison.
527 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
528 ExtendedDetectionInfo response format.
529 Notification from John Horne.
531 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
534 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
535 XSL and documented dependency on system catalogs, with examples of how
538 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
541 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
542 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
543 configuration file which is writeable by the Exim user or group.
545 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
546 of configuration files to cover files specified with the -C option if
547 they are going to be used with root privileges, not just the default
550 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
551 option (effectively making it always true).
553 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
554 files to be used while preserving root privileges.
556 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
557 that rogue child processes cannot use them.
559 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
560 run-time user, instead of root.
562 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
563 Exim run-time user without dropping privileges.
565 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
566 result string, instead of calling string_vformat() twice with the same
569 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
570 for other users. Others should always drop root privileges if they use
571 -C on the command line, even for a whitelisted configure file.
573 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
575 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
581 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
582 $data_path, and $header_path variables; fixed documentation bugs and
585 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
586 exipick to access non-standard spools, including the "frozen" queue
589 NM/01 Bugzilla 965: Support mysql stored procedures.
590 Patch from Alain Williams
592 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
594 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
595 Patch from Andreas Metzler
597 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
598 Patch from Kirill Miazine
600 NM/05 Bugzilla 671: Added umask to procmail example.
602 JJ/03 installed exipick 20100323.0, fixing doc bug
604 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
605 directory. Notification and patch from Dan Rosenberg.
607 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
609 TK/02 Improve log output when DKIM signing operation fails.
611 MH/01 Treat the transport option dkim_domain as a colon separated
612 list, not as a single string, and sign the message with each element,
613 omitting multiple occurences of the same signer.
615 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
616 Bugzilla 985, 986. Patch by Simon Arlott
618 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
619 Patch by Simon Arlott
621 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
622 MBX locking. Notification from Dan Rosenberg.
628 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
630 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
632 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
634 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
636 NM/04 Bugzilla 915: Flag broken perl installation during build.
642 TK/01 Added patch by Johannes Berg that expands the main option
643 "spamd_address" if it starts with a dollar sign.
645 TK/02 Write list of recipients to X-Envelope-Sender header when building
646 the mbox-format spool file for content scanning (suggested by Jakob
649 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
650 (http://www.dcc-servers.net/) support via dccifd. Activated by
651 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
653 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
654 by Mark Daniel Reidel <mr@df.eu>.
656 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
657 When building exim an external PCRE library is now needed -
658 PCRE is a system library on the majority of modern systems.
659 See entry on PCRE_LIBS in EDITME file.
661 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
662 conversation. Added nologin parameter to request.
663 Patch contributed by Kirill Miazine.
665 TF/01 Do not log submission mode rewrites if they do not change the address.
667 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
669 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
670 log files in place. Contributed by Roberto Lima.
672 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
674 TF/03 Bugzilla 615: When checking the local_parts router precondition
675 after a local_part_suffix or local_part_prefix option, Exim now
676 does not use the address's named list lookup cache, since this
677 contains cached lookups for the whole local part.
679 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
680 Robert Millan. Documentation is in experimental-spec.txt.
682 TF/04 Bugzilla 668: Fix parallel build (make -j).
684 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
686 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
687 Patch provided by Jan Srzednicki.
689 TF/05 Leading white space used to be stripped from $spam_report which
690 wrecked the formatting. Now it is preserved.
692 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
693 that they are available at delivery time.
695 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
697 TF/08 TLS error reporting now respects the incoming_interface and
698 incoming_port log selectors.
700 TF/09 Produce a more useful error message if an SMTP transport's hosts
701 setting expands to an empty string.
703 NM/06 Bugzilla 744: EXPN did not work under TLS.
704 Patch provided by Phil Pennock.
706 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
707 Patch provided by Richard Godbee.
709 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
710 acl_smtp_notquit, added index entry.
712 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
713 Patch provided by Eugene Bujak.
715 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
716 accept(). Patch provided by Maxim Dounin.
718 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
719 Patch provided by Phil Pennock.
721 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
723 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
724 Patch provided by Brad "anomie" Jorsch.
726 NM/14 Bugzilla 622: Added timeout setting to transport filter.
727 Patch provided by Dean Brooks.
729 TK/05 Add native DKIM support (does not depend on external libraries).
731 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
732 Patch provided by Graeme Fowler.
734 NM/16 Bugzilla 851: Documentation example syntax fix.
736 NM/17 Changed NOTICE file to remove references to embedded PCRE.
738 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
741 NM/19 Bugzilla 745: TLS version reporting.
742 Patch provided by Phil Pennock.
744 NM/20 Bugzilla 167: bool: condition support.
745 Patch provided by Phil Pennock.
747 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
748 clients. Patch provided by Phil Pennock.
750 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
751 Patch provided by Brad "anomie" Jorsch.
753 NM/23 Bugzilla 687: Fix misparses in eximstats.
754 Patch provided by Heiko Schlittermann.
756 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
757 Patch provided by Heiko Schlittermann.
759 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
760 plus update to original patch.
762 NM/26 Bugzilla 799: Documentation correction for ratelimit.
764 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
765 Patch provided by David Brownlee.
767 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
769 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
771 NM/30 Bugzilla 888: TLS documentation bugfixes.
773 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
775 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
776 Unlike the original bugzilla I have changed all shell scripts in src tree.
778 NM/33 Bugzilla 898: Transport filter timeout fix.
779 Patch by Todd Rinaldo.
781 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
782 Patch by Serge Demonchaux.
784 NM/35 Bugzilla 39: Base64 decode bug fixes.
785 Patch by Jakob Hirsch.
787 NM/36 Bugzilla 909: Correct connect() call in dcc code.
789 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
791 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
793 NM/39 Bugzilla 911: Fixed MakeLinks build script.
799 TK/01 Add preliminary DKIM support. Currently requires a forked version of
800 ALT-N's libdkim that I have put here:
801 http://duncanthrax.net/exim-experimental/
803 Note to Michael Haardt: I had to rename some vars in sieve.c. They
804 were called 'true' and it seems that C99 defines that as a reserved
805 keyword to be used with 'bool' variable types. That means you could
806 not include C99-style headers which use bools without triggering
807 build errors in sieve.c.
809 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
810 as mailq or other aliases. Changed the --help handling significantly
811 to do whats expected. exim_usage() emits usage/help information.
813 SC/01 Added the -bylocaldomain option to eximstats.
815 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
817 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
819 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
825 PH/01 Another patch from the Sieve maintainer.
827 PH/02 When an IPv6 address is converted to a string for single-key lookup
828 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
829 dots are used instead of colons so that keys in lsearch files need not
830 contain colons. This was done some time before quoting was made available
831 in lsearch files. However, iplsearch files do require colons in IPv6 keys
832 (notated using the quote facility) so as to distinguish them from IPv4
833 keys. This meant that lookups for IP addresses in host lists did not work
834 for iplsearch lookups.
836 This has been fixed by arranging for IPv6 addresses to be expressed with
837 colons if the lookup type is iplsearch. This is not incompatible, because
838 previously such lookups could never work.
840 The situation is now rather anomolous, since one *can* have colons in
841 ordinary lsearch keys. However, making the change in all cases is
842 incompatible and would probably break a number of configurations.
844 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
847 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
848 conversion specification without a maximum field width, thereby enabling
849 a rogue spamd server to cause a buffer overflow. While nobody in their
850 right mind would setup Exim to query an untrusted spamd server, an
851 attacker that gains access to a server running spamd could potentially
852 exploit this vulnerability to run arbitrary code as the Exim user.
854 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
855 $primary_hostname instead of what libspf2 thinks the hosts name is.
857 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
858 a directory entry by the name of the lookup key. Previously, if a
859 symlink pointed to a non-existing file or a file in a directory that
860 Exim lacked permissions to read, a lookup for a key matching that
861 symlink would fail. Now it is enough that a matching directory entry
862 exists, symlink or not. (Bugzilla 503.)
864 PH/03 The body_linecount and body_zerocount variables are now exported in the
867 PH/04 Added the $dnslist_matched variable.
869 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
870 This means they are set thereafter only if the connection becomes
873 PH/06 Added the client_condition to authenticators so that some can be skipped
874 by clients under certain conditions.
876 PH/07 The error message for a badly-placed control=no_multiline_responses left
877 "_responses" off the end of the name.
879 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
881 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
882 (without spaces) instead of just copying the configuration text.
884 PH/10 Added the /noupdate option to the ratelimit ACL condition.
886 PH/11 Added $max_received_linelength.
888 PH/12 Added +ignore_defer and +include_defer to host lists.
890 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
891 way in which PCRE > 7.0 is built.
893 PH/14 Implemented queue_only_load_latch.
895 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
896 MAIL command. The effect was to mangle the value on 64-bit systems.
898 PH/16 Another patch from the Sieve maintainer.
900 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
902 PH/18 If a system quota error occurred while trying to create the file for
903 a maildir delivery, the message "Mailbox is full" was not appended to the
904 bounce if the delivery eventually timed out. Change 4.67/27 below applied
905 only to a quota excession during the actual writing of the file.
907 PH/19 It seems that peer DN values may contain newlines (and other non-printing
908 characters?) which causes problems in log lines. The DN values are now
909 passed through string_printing() before being added to log lines.
911 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
912 and InterBase are left for another time.)
914 PH/21 Added message_body_newlines option.
916 PH/22 Guard against possible overflow in moan_check_errorcopy().
918 PH/23 POSIX allows open() to be a macro; guard against that.
920 PH/24 If the recipient of an error message contained an @ in the local part
921 (suitably quoted, of course), incorrect values were put in $domain and
922 $local_part during the evaluation of errors_copy.
928 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
929 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
932 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
933 issue a MAIL command.
935 PH/02 In an ACL statement such as
937 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
939 if a client was not listed at all, or was listed with a value other than
940 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
941 the condition was not true (as it should be), so access was not denied.
942 The bug was that the ! inversion was incorrectly passed on to the second
943 item. This has been fixed.
945 PH/03 Added additional dnslists conditions == and =& which are different from
946 = and & when the dns lookup returns more than one IP address.
948 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
949 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
951 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
952 FSYNC, which compiles an option called disable_fsync that allows for
953 bypassing fsync(). The documentation is heavily laced with warnings.
955 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
957 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
958 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
959 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
960 including adding "make clean"; (3) Added -fPIC when compiling the test
961 dynamically loaded module, to get rid of a warning.
963 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
964 message fails, move_frozen_messages = true and ignore_bounce_errors_after
965 = 0s. The bug is otherwise harmless.
967 PH/07 There was a bug in the dovecot authenticator such that the value of
968 $auth1 could be overwritten, and so not correctly preserved, after a
969 successful authentication. This usually meant that the value preserved by
970 the server_setid option was incorrect.
972 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
974 PH/09 Installed PCRE release 7.0.
976 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
977 run for batched SMTP input. It is now run at the start of every message
978 in the batch. While fixing this I discovered that the process information
979 (output by running exiwhat) was not always getting set for -bs and -bS
980 input. This is fixed, and it now also says "batched" for BSMTP.
982 PH/11 Added control=no_pipelining.
984 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
985 patch, slightly modified), and move the expansion of helo_data till after
986 the connection is made in the smtp transport (so it can use these
989 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
991 PH/14 Added log_selector = +pid.
993 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
995 PH/16 Add ${if forany and ${if forall.
997 PH/17 Added dsn_from option to vary the From: line in DSNs.
999 PH/18 Flush SMTP output before performing a callout, unless control =
1000 no_callout_flush is set.
1002 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1003 was true (the default) a successful delivery failed to delete the retry
1004 item, thus causing premature timeout of the address. The bug is now
1007 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1009 PH/21 Long custom messages for fakedefer and fakereject are now split up
1010 into multiline reponses in the same way that messages for "deny" and
1011 other ACL rejections are.
1013 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1014 with slight modification.
1016 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1017 draft, changing the syntax and factoring some duplicate code".
1019 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1020 for deliveries of the second and subsequent messages over the same SMTP
1023 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1024 ${reduce, with only minor "tidies".
1026 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1028 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1029 expansion side effects.
1031 PH/27 When a message times out after an over-quota error from an Exim-imposed
1032 quota, the bounce message says "mailbox is full". This message was not
1033 being given when it was a system quota that was exceeded. It now should
1036 MH/03 Made $recipients available in local_scan(). local_scan() already has
1037 better access to the recipient list through recipients_list[], but
1038 $recipients can be useful in postmaster-provided expansion strings.
1040 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1041 in the case of a MAIL command with additional options following the
1042 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1043 were accidentally chopped off.
1045 PH/29 SMTP synchronization checks are implemented when a command is read -
1046 there is a check that no more input is waiting when there shouldn't be
1047 any. However, for some commands, a delay in an ACL can mean that it is
1048 some time before the response is written. In this time, more input might
1049 arrive, invalidly. So now there are extra checks after an ACL has run for
1050 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1051 pipelining has not been advertised.
1053 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1055 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1056 returned in the SMTP response when smtp_return_error_details was false.
1057 This has been fixed.
1059 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1060 instead of the C I/O that was originally supplied, because problems were
1061 reported on Solaris.
1063 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1064 Exim which did not show up earlier: it was assuming that a call to
1065 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1066 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1067 was a macro that became an assignment, so it seemed to work. This has
1068 changed to a proper function call with a void return, hence the compile
1069 error. Exim's code has been fixed.
1071 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1074 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1076 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1078 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1079 because it turns out to be too big or there is a timeout) there is no
1080 "Completed" line in the log. When some messages of this type were
1081 selected by exigrep, they were listed as "not completed". Others were
1082 picked up by some special patterns. I have improved the selection
1083 criteria to be more general.
1085 PH/38 The host_find_failed option in the manualroute router can now be set
1086 to "ignore", to completely ignore a host whose IP address cannot be
1087 found. If all hosts are ignored, the behaviour is controlled by the new
1088 host_all_ignored option.
1090 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1091 homing or because of multiple MX records with /mx) generated more than
1092 one IP address, and the following item turned out to be the local host,
1093 all the secondary addresses of the first item were incorrectly removed
1094 from the list, along with the local host and any following hosts (which
1095 is what is supposed to happen).
1097 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1098 whoever called Exim into the -H file. In the case of the daemon it was
1099 behaving confusingly. When first started, it used values for whoever
1100 started the daemon, but after a SIGHUP it used the Exim user (because it
1101 calls itself on a restart). I have changed the code so that it now always
1104 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1105 message are rejected with the same error (e.g. no authentication or bad
1106 sender address), and a DATA command is nevertheless sent (as can happen
1107 with PIPELINING or a stupid MUA), the error message that was given to the
1108 RCPT commands is included in the rejection of the DATA command. This is
1109 intended to be helpful for MUAs that show only the final error to their
1112 PH/42 Another patch from the Sieve maintainer.
1114 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1115 Eximstats - Fixed some broken HTML links and added missing column headers
1117 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1118 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1120 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1122 PH/43 Yet another patch from the Sieve maintainer.
1124 PH/44 I found a way to check for a TCP/IP connection going away before sending
1125 the response to the final '.' that terminates a message, but only in the
1126 case where the client has not sent further data following the '.'
1127 (unfortunately, this is allowed). However, in many cases there won't be
1128 any further data because there won't be any more messages to send. A call
1129 to select() can be used: if it shows that the input is "ready", there is
1130 either input waiting, or the socket has been closed. An attempt to read
1131 the next input character can distinguish the two cases. Previously, Exim
1132 would have sent an OK response which the client would never have see.
1133 This could lead to message repetition. This fix should cure that, at
1134 least in a lot of common cases.
1136 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1137 advertised in response to EHLO.
1143 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1144 fixed by 4.65/MH/01 (is this a record?) are fixed:
1146 (i) An empty string was always treated as zero by the numeric comparison
1147 operators. This behaviour has been restored.
1149 (ii) It is documented that the numeric comparison operators always treat
1150 their arguments as decimal numbers. This was broken in that numbers
1151 starting with 0 were being interpreted as octal.
1153 While fixing these problems I realized that there was another issue that
1154 hadn't been noticed. Values of message_size_limit (both the global option
1155 and the transport option) were treated as octal if they started with 0.
1156 The documentation was vague. These values are now always treated as
1157 decimal, and I will make that clear in the documentation.
1163 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1164 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1167 MH/01 Don't check that the operands of numeric comparison operators are
1168 integers when their expansion is in "skipping" mode (fixes bug
1169 introduced by 4.64-PH/07).
1171 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1172 child addresses, Exim now panics and dies. Previously, because the count
1173 is held in a short int, deliveries were likely to be lost. As such a
1174 large number of recipients for a single message is ridiculous
1175 (performance will be very, very poor), I have chosen to impose a limit
1176 rather than extend the field.
1182 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1183 leftover -K file (the existence of which was triggered by #402).
1184 While we were at it, introduced process PID as part of the -K
1185 filename. This should rule out race conditions when creating
1188 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1189 processing considerably. Previous code took too long for large mails,
1190 triggering a timeout which in turn triggers #401.
1192 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1193 in the DK code in transports.c. sendfile() is not really portable,
1194 hence the _LINUX specificness.
1196 TF/01 In the add_headers option to the mail command in an Exim filter,
1197 there was a bug that Exim would claim a syntax error in any
1198 header after the first one which had an odd number of characters
1201 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1202 callout verification, Exim cached a "reject" for the entire domain. This
1203 is correct for most verifications, but it is not correct for a recipient
1204 verification with use_sender or use_postmaster set, because in that case
1205 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1206 case of MAIL FROM:<> rejection from other early rejections (e.g.
1207 rejection of HELO). When verifying a recipient using a non-null MAIL
1208 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1209 Whatever the result of the callout, the value of the domain cache is
1210 left unchanged (for any other kind of callout, getting as far as trying
1211 RCPT means that the domain itself is ok).
1213 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1216 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1217 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1218 session, the daemon ignores ECONNECT errors and logs others; it now
1219 ignores EPIPE as well.
1221 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1222 (quoted-printable decoding).
1224 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1225 later the small subsequent patch to fix an introduced bug.
1227 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1229 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1231 PH/08 An error is now given if message_size_limit is specified negative.
1233 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1234 to be given (somewhat) arbitrary names.
1236 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1239 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1240 miscellaneous code fixes
1242 PH/10 Added the log_reject_target ACL modifier to specify where to log
1245 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1246 hostname. This is wrong, because it relates to the incoming message (and
1247 probably the interface on which it is arriving) and not to the outgoing
1248 callout (which could be using a different interface). This has been
1249 changed to use the value of the helo_data option from the smtp transport
1250 instead - this is what is used when a message is actually being sent. If
1251 there is no remote transport (possible with a router that sets up host
1252 addresses), $smtp_active_hostname is used.
1254 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1255 tweaks were necessary in order to get it to work (see also 21 below):
1256 (a) The code assumed that strncpy() returns a negative number on buffer
1257 overflow, which isn't the case. Replaced with Exim's string_format()
1259 (b) There were several signed/unsigned issues. I just did the minimum
1260 hacking in of casts. There is scope for a larger refactoring.
1261 (c) The code used strcasecmp() which is not a standard C function.
1262 Replaced with Exim's strcmpic() function.
1263 (d) The code set only $1; it now sets $auth1 as well.
1264 (e) A simple test gave the error "authentication client didn't specify
1265 service in request". It would seem that Dovecot has changed its
1266 interface. Fortunately there's a specification; I followed it and
1267 changed what the client sends and it appears to be working now.
1269 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1272 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1273 address A is aliased to B and C, where B exists and C does not. Without
1274 -v the output is "A verified" because verification stops after a
1275 successful redirection if more than one address is generated. However,
1276 with -v the child addresses are also verified. Exim was outputting "A
1277 failed to verify" and then showing the successful verification for C,
1278 with its parentage. It now outputs "B failed to verify", showing B's
1279 parentage before showing the successful verification of C.
1281 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1282 look up a TXT record in a specific list after matching in a combined
1285 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1286 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1287 they consult the DNS. I had assumed they would set it the way they
1288 wanted; and indeed my experiments on Linux seem to show that in some
1289 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1290 To be on the safe side, however, I have now made the interface to
1291 host_find_byname() similar to host_find_bydns(), with an argument
1292 containing the DNS resolver options. The host_find_byname() function now
1293 sets these options at its start, just as host_find_bydns() does. The smtp
1294 transport options dns_qualify_single and dns_search_parents are passed to
1295 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1296 of host_find_byname() use the default settings of RES_DEFNAMES
1297 (qualify_single) but not RES_DNSRCH (search_parents).
1299 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1300 spool_read_header() do less string testing, by means of a preliminary
1301 switch on the second character of optional "-foo" lines. (This is
1302 overdue, caused by the large number of possibilities that now exist.
1303 Originally there were few.) While I was there, I also converted the
1304 str(n)cmp tests so they don't re-test the leading "-" and the first
1305 character, in the hope this might squeeze out yet more improvement.
1307 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1308 flag allowing group syntax was set by the header_syntax check but not
1309 turned off, possible causing trouble later; (2) The flag was not being
1310 set at all for the header_verify test, causing "group"-style headers to
1311 be rejected. I have now set it in this case, and also caused header_
1312 verify to ignore an empty address taken from a group. While doing this, I
1313 came across some other cases where the code for allowing group syntax
1314 while scanning a header line wasn't quite right (mostly, not resetting
1315 the flag correctly in the right place). These bugs could have caused
1316 trouble for malformed header lines. I hope it is now all correct.
1318 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1319 with the "reply" argument non-NULL. The code, however (which originally
1320 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1321 but it didn't always do it. This confused somebody who was copying the
1322 code for some other use. I have removed all the tests.
1324 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1325 feature that was used to support insecure browsers during the U.S. crypto
1326 embargo. It requires special client support, and Exim is probably the
1327 only MTA that supported it -- and would never use it because real RSA is
1328 always available. This code has been removed, because it had the bad
1329 effect of slowing Exim down by computing (never used) parameters for the
1330 RSA_EXPORT functionality.
1332 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1333 authenticator to fail if there's a tab character in the incoming data
1334 (there should never be unless someone is messing about, as it's supposed
1335 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1336 if the connection is using TLS or if the remote IP is the same as the
1337 local IP, and the "valid-client-cert option" if a client certificate has
1340 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1341 authenticators. This can be used for authorization after authentication
1342 succeeds. (In the case of plaintext, it servers for both authentication
1345 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1346 if any retry times were supplied.
1348 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1349 connection, where there is no client IP address to check. In this
1350 situation, the verify now always succeeds.
1352 PH/25 Applied John Jetmore's -Mset patch.
1354 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1356 PH/27 In a string expansion for a processed (not raw) header when multiple
1357 headers of the same name were present, leading whitespace was being
1358 removed from all of them, but trailing whitespace was being removed only
1359 from the last one. Now trailing whitespace is removed from each header
1360 before concatenation. Completely empty headers in a concatenation (as
1361 before) are ignored.
1363 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1364 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1366 PH/29 [Removed. This was a change that I later backed out, and forgot to
1367 correct the ChangeLog entry (that I had efficiently created) before
1368 committing the later change.]
1370 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1371 address errors (4xx response to RCPT) over the same connection as other
1372 messages routed to the same hosts. Such deliveries are always "forced",
1373 so retry times are not inspected. This resulted in far too many retries
1374 for the affected addresses. The effect occurred only when there were more
1375 hosts than the hosts_max_try setting in the smtp transport when it had
1376 the 4xx errors. Those hosts that it had tried were not added to the list
1377 of hosts for which the message was waiting, so if all were tried, there
1378 was no problem. Two fixes have been applied:
1380 (i) If there are any address or message errors in an SMTP delivery, none
1381 of the hosts (tried or untried) are now added to the list of hosts
1382 for which the message is waiting, so the message should not be a
1383 candidate for sending over the same connection that was used for a
1384 successful delivery of some other message. This seems entirely
1385 reasonable: after all the message is NOT "waiting for some host".
1386 This is so "obvious" that I'm not sure why it wasn't done
1387 previously. Hope I haven't missed anything, but it can't do any
1388 harm, as the worst effect is to miss an optimization.
1390 (ii) If, despite (i), such a delivery is accidentally attempted, the
1391 routing retry time is respected, so at least it doesn't keep
1392 hammering the server.
1394 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1395 in ${readsocket because some servers need this prod.
1397 PH/32 Added some extra debug output when updating a wait-xxx database.
1399 PH/33 The hint "could be header name not terminated by colon", which has been
1400 given for certain expansion errors for a long time, was not being given
1401 for the ${if def:h_colon_omitted{... case.
1403 PH/34 The spec says: "With one important exception, whenever a domain list is
1404 being scanned, $domain contains the subject domain." There was at least
1405 one case where this was not true.
1407 PH/35 The error "getsockname() failed: connection reset by peer" was being
1408 written to the panic log as well as the main log, but it isn't really
1409 panic-worthy as it just means the connection died rather early on. I have
1410 removed the panic log writing for the ECONNRESET error when getsockname()
1413 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1414 runs only) independently of the message's sender address. This meant
1415 that, if the 4xx error was in fact related to the sender, a different
1416 message to the same recipient with a different sender could confuse
1417 things. In particualar, this can happen when sending to a greylisting
1418 server, but other circumstances could also provoke similar problems.
1419 I have changed the default so that the retry time for these errors is now
1420 based a combination of the sender and recipient addresses. This change
1421 can be overridden by setting address_retry_include_sender=false in the
1424 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1425 remote server are returned as part of bounce messages. This was not
1426 happening for LMTP over a pipe (the lmtp transport), but now it is the
1427 same for both kinds of LMTP.
1429 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1430 in header lines that were in fact CNAMEs. This is no longer the case.
1432 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1433 and queue runs started by the daemon processed all messages. This has
1434 been fixed so that -R and -S can now usefully be given with -q<time>.
1436 PH/40 Import PCRE release 6.7 (fixes some bugs).
1438 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1440 PH/42 Give an error if -q is specified more than once.
1442 PH/43 Renamed the variables $interface_address and $interface_port as
1443 $received_ip_address and $received_port, to make it clear that these
1444 values apply to message reception, and not to the outgoing interface when
1445 a message is delivered. (The old names remain recognized, of course.)
1447 PH/44 There was no timeout on the connect() call when using a Unix domain
1448 socket in the ${readsocket expansion. There now is.
1450 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1451 be meaningful with "accept".
1453 SC/01 Eximstats V1.43
1454 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1456 SC/02 Eximstats V1.44
1457 Use a glob alias rather than an array ref in the generated
1458 parser. This improves both readability and performance.
1460 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1461 Collect SpamAssassin and rejection statistics.
1462 Don't display local sender or destination tables unless
1463 there is data to show.
1464 Added average volumes into the top table text output.
1466 SC/04 Eximstats V1.46
1467 Collect data on the number of addresses (recipients)
1468 as well as the number of messages.
1470 SC/05 Eximstats V1.47
1471 Added 'Message too big' to the list of mail rejection
1472 reasons (thanks to Marco Gaiarin).
1474 SC/06 Eximstats V1.48
1475 Mainlog lines which have GMT offsets and are too short to
1476 have a flag are now skipped.
1478 SC/07 Eximstats V1.49 (Alain Williams)
1479 Added the -emptyok flag.
1481 SC/08 Eximstats V1.50
1482 Fixes for obtaining the IP address from reject messages.
1484 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1485 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1486 whitesspace changes from 4.64-PH/27
1488 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1491 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1492 are found, allow negative numbers in numeric criteria)
1494 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1496 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1497 to match changes made in 4.64-PH/43
1499 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1501 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1502 "domain" is actually an IP address, and force a failure. This locks out
1503 those revolvers/nameservers that support "A-for-A" lookups, in
1504 contravention of the specifications.
1506 PH/48 When a host name was looked up from an IP address, and the subsequent
1507 forward lookup of the name timed out, the host name was left in
1508 $sender_host_name, contrary to the specification.
1510 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1511 restricted to single-key lookups, Exim was not diagnosing an error if
1512 * or *@ was used with a query-style lookup.
1514 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1516 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1517 long ago, but noone interested enough thought of it. Let's just say that
1518 the "1.1" means that there are some new functions that weren't there at
1519 some point in the past.
1521 PH/51 Error processing for expansion failure of helo_data from an smtp
1522 transport during callout processing was broken.
1524 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1525 tested/used via the -bh/-bhc/-bs options.
1527 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1528 bug, fixed in subsequent PCRE releases).
1530 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1531 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1533 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1539 SC/01 Use a glob alias rather than an array ref in eximstats generated
1540 parser. This improves both readability and performance.
1542 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1543 Don't display local sender or destination tables in eximstats unless
1544 there is data to show.
1545 Added average volumes into the eximstats top table text output.
1547 SC/03 Collect data on the number of addresses (recipients) as well
1548 as the number of messages in eximstats.
1550 TF/01 Correct an error in the documentation for the redirect router. Exim
1551 does (usually) call initgroups() when daemonizing.
1553 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1554 with consistent privilege compared to when running as a daemon.
1556 TF/03 Note in the spec that $authenticated_id is not set for local
1557 submissions from trusted users.
1559 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1560 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1562 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1563 by adding some example configuration directives to the default
1564 configuration file. A little bit of work is required to uncomment the
1565 directives and define how usernames and passwords are checked, but
1566 there is now a framework to start from.
1568 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1569 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1570 without this. I don't know how relevant this is to other LDAP libraries.
1572 PH/02 Add the verb name to the "unknown ACL verb" error.
1574 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1576 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1578 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1579 directory not expanded when it should be if an expanded home directory
1580 was set for the address (which is overridden by the transport).
1582 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1585 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1586 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1587 because it is too late at that time, and has no effect.
1589 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1590 security issue with \' (bugzilla #107). I could not use the
1591 PQescapeStringConn() function, because it needs a PGconn value as one of
1594 PH/08 When testing addresses using -bt, indicate those final addresses that
1595 are duplicates that would not cause an additional delivery. At least one
1596 person was confused, thinking that -bt output corresponded to deliveries.
1597 (Suppressing duplicates isn't a good idea as you lose the information
1598 about possibly different redirections that led to the duplicates.)
1600 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1601 systems where poll() doesn't work, in particular OS X.
1603 PH/10 Added more information to debugging output for retry time not reached.
1605 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1606 operations in malware.c.
1608 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1611 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1612 syslog_duplication set false, log lines that would normally be written
1613 both the the main log and to the reject log were not written to syslog at
1616 PH/14 In the default configuration, change the use of "message" in ACL warn
1617 statements to "add_header".
1619 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1620 not followed by a command (e.g. "seen endif").
1622 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1623 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1626 PH/17 Added extra conditions to the default value of delay_warning_condition
1630 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1631 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1632 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1635 The Auto-Submitted: and various List- headers are standardised, whereas I
1636 don't think Precedence: ever was.
1638 PH/18 Refactored debugging code in route_finduser() to show more information,
1639 in particular, the error code if getpwnam() issues one.
1641 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1642 This is apparently needed in addition to the PH/07 change above to avoid
1643 any possible encoding problems.
1645 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1646 but not after initializing Perl.
1648 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1649 output them only if debugging. By default they are written stderr,
1650 apparently, which is not desirable.
1652 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1655 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1658 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1660 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1661 authenticated or an ident call has been made. Suppress the default
1662 values for $authenticated_id and $authenticated_sender (but permit -oMai
1663 and -oMas) when testing with -bh.
1665 PH/24 Re-jigged the order of the tests in the default configuration so that the
1666 tests for valid domains and recipients precede the DNS black list and CSA
1667 tests, on the grounds that those ones are more expensive.
1669 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1670 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1671 This bug exists in every version of Exim that I still have, right back to
1674 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1675 However, an attempt to turn on case-sensitivity in a regex key by
1676 including (?-i) didn't work because the subject string was already
1677 lowercased, and the effects were non-intuitive. It turns out that a
1678 one-line patch can be used to allow (?-i) to work as expected.
1684 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1685 other effects) broke the use of negated acl sub-conditions.
1687 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1690 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1691 "Deny" causes Exim to reject the incoming connection with a 554 error.
1692 Unfortunately, if there is a major crisis, such as a disk failure,
1693 tcp-wrappers gives "deny", whereas what one would like would be some
1694 kind of temporary error. A kludge has been added to help with this.
1695 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1696 554 error is used if errno is still zero or contains ENOENT (which occurs
1697 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1700 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1702 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1703 errors. Otherwise a message that provokes a temporary error (when other
1704 messages do not) can cause a whole host to time out.
1706 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1707 addresses were routed directly to files or pipes from a redirect router.
1708 File deliveries just didn't batch; pipe deliveries might have suffered
1711 PH/06 A failure to get a lock for a hints database would erroneously always say
1712 "Failed to get write lock", even when it was really a read lock.
1714 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1715 of 0600. This has been changed to use the value of the lockfile_mode
1716 option (which defaults to 0600).
1718 PH/08 Applied small patch from the Sieve maintainer.
1720 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1721 folder from quota calculations, a direct delivery into this folder messed
1722 up the contents of the maildirsize file. This was because the regex was
1723 used only to exclude .Trash (or whatever) when the size of the mailbox
1724 was calculated. There was no check that a delivery was happening into an
1725 excluded directory. This bug has been fixed by ignoring all quota
1726 processing for deliveries into excluded directories.
1728 PH/10 Added the maildirfolder_create_regex option to appendfile.
1734 PH/01 The code for finding all the local interface addresses on a FreeBSD
1735 system running IPv6 was broken. This may well have applied to all BSD
1736 systems, as well as to others that have similar system calls. The broken
1737 code found IPv4 interfaces correctly, but gave incorrect values for the
1738 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1739 that it would not match correctly against @[] and not recognize the IPv6
1742 PH/02 The ipliteral router was not recognizing addresses of the form user@
1743 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1745 PH/03 Added disable_ipv6.
1747 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1748 decoded form, because it is most often used to construct To: headers
1749 lines in autoreplies, and the decoded form may well be syntactically
1750 invalid. However, $reply_address has leading white space removed, and all
1751 newlines turned into spaces so that the autoreply transport does not
1754 PH/05 If group was specified without a user on a router, and no group or user
1755 was specified on a transport, the group from the router was ignored.
1757 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1758 for visible compile-time settings that can be used to change these
1759 numbers, for those that want even more. Backwards compatibility with old
1760 spool files has been maintained. However, going back to a previous Exim
1761 release will lost any variables that are in spool files.
1763 PH/07 Two small changes when running in the test harness: increase delay when
1764 passing a TCP/IP connection to a new process, in case the original
1765 process has to generate a bounce, and remove special handling of
1766 127.0.0.2 (sic), which is no longer necessary.
1768 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1769 be the same on different OS.
1771 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1774 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1775 whether --show-vars was specified or not
1777 JJ/02 exipick: Added support for new ACL variable spool format introduced
1780 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1781 syntactically invalid From: or Reply-to: line, and a filter used this to
1782 generate an autoreply, and therefore failed to obtain an address for the
1783 autoreply, Exim could try to deliver to a non-existent relative file
1784 name, causing unrelated and misleading errors. What now happens is that
1785 it logs this as a hard delivery error, but does not attempt to create a
1788 PH/11 The exinext utility has a -C option for testing purposes, but although
1789 the given file was scanned by exinext itself; it wasn't being passed on
1790 when Exim was called.
1792 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1793 an end-of-file indication when reading a command response.
1795 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1796 compiled. In many other places in Exim, IPv6 addresses are always
1797 recognized, so I have changed this. It also means that IPv4 domain
1798 literals of the form [IPV4:n.n.n.n] are now always recognized.
1800 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1801 used if the router is not running as root, for example, when verifying at
1802 ACL time, or when using -bh. The debugging output from this situation was
1803 non-existent - all you got was a failure to exec. I have made two
1806 (a) Failures to set uid/gid, the current directory, or a process leader
1807 in a subprocess such as that created by queryprogram now generate
1808 suitable debugging ouput when -d is set.
1810 (b) The queryprogram router detects when it is not running as root,
1811 outputs suitable debugging information if -d is set, and then runs
1812 the subprocess without attempting to change uid/gid.
1814 PH/15 Minor change to Makefile for building test_host (undocumented testing
1817 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1818 additional section of a DNS packet that returns MX or SRV records.
1819 Instead, it always explicitly searches for A/AAAA records. This avoids
1820 major problems that occur when a DNS server includes only records of one
1821 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1822 fixed another bug: if SRV records were looked up and the corresponding
1823 address records were *not* found in the additional section, the port
1824 values from the SRV records were lost.
1826 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1827 using the correct key (the original address) when searching the retry
1828 rules in order to find which one to use for generating the retry hint.
1830 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1831 adding the default one. Similarly, if it contains a Reply-To: header, the
1832 errors_reply_to option, if set, is not used.
1834 PH/19 When calculating a retry time, Exim used to measure the "time since
1835 failure" by looking at the "first failed" field in the retry record. Now
1836 it does not use this if it is later than than the arrival time of the
1837 message. Instead it uses the arrival time. This makes for better
1838 behaviour in cases where some deliveries succeed, thus re-setting the
1839 "first failed" field. An example is a quota failure for a huge message
1840 when small messages continue to be delivered. Without this change, the
1841 "time since failure" will always be short, possible causing more frequent
1842 delivery attempts for the huge message than are intended.
1843 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1845 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1846 $1, $2, $3) because the numerical variables can be reset during some
1847 expansion items (e.g. "match"), thereby losing the authentication data.
1849 PH/21 Make -bV show the size of off_t variables so that the test suite can
1850 decide whether to run tests for quotas > 2G.
1852 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1853 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1854 filecount value is greater than 2G or if a quota value is greater than 2G
1855 on a system where the size of off_t is not greater than 4, a panic error
1858 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1859 never match. The debug and -bh output now contains an explicit error
1860 message indicating a malformed IPv4 address or mask.
1862 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1863 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1864 PH/23 above applies.
1866 PH/25 Do not write to syslog when running in the test harness. The only
1867 occasion when this arises is a failure to open the main or panic logs
1868 (for which there is an explicit test).
1870 PH/26 Added the /no_tell option to "control=freeze".
1872 PH/27 If a host name lookup failed very early in a connection, for example, if
1873 the IP address matched host_lookup and the reverse lookup yielded a name
1874 that did not have a forward lookup, an error message of the form "no IP
1875 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1876 could be logged. Now it outputs the IP address instead of "NULL".
1878 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1879 allows the sender and the authenticated sender to be set when
1880 submitting a message from within Exim. Since child_open_exim() is
1881 documented for local_scan(), the new function should be too.
1883 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1884 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1885 results in an empty string is now treated as unset.
1887 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1889 PH/31 Added sender_verify_fail logging option.
1891 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1892 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1893 tidied the source and removed it altogether.
1895 PH/33 When a queue run was abandoned because the load average was too high, a
1896 log line was always written; now it is written only if the queue_run log
1897 selector is set. In addition, the log line for abandonment now contains
1898 information about the queue run such as the pid. This is always present
1899 in "start" and "stop" lines but was omitted from the "abandon" line.
1901 PH/34 Omit spaces between a header name and the colon in the error message that
1902 is given when verify = headers_syntax fails (if there are lots of them,
1903 the message gets confusing).
1905 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1906 names, as there are now some PTR records that contain slashes. This check
1907 is only to protect against broken name servers that fall over on strange
1908 characters, so the fact that it applies to all lookups doesn't matter.
1910 PH/36 Now that the new test suite is complete, we can remove some of the
1911 special code in Exim that was needed for the old test suite. For example,
1912 sorting DNS records because real resolvers return them in an arbitrary
1913 order. The new test suite's fake resolver always returns records in the
1916 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1917 bounces) except when queue_only is set, to avoid logging races between
1918 the different processes.
1920 PH/38 Panic-die if .include specifies a non-absolute path.
1922 PH/39 A tweak to the "H" retry rule from its user.
1924 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1925 a label. They prevented compilation on older perls.
1927 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1928 a warning to be raised on newish perls.
1930 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1931 on queue. Changes to match documented behaviour of showing count of
1932 messages matching specified criteria.
1934 PH/40 Changed the default ident timeout from 30s to 5s.
1936 PH/41 Added support for the use of login_cap features, on those BSD systems
1937 that have them, for controlling the resources used by pipe deliveries.
1939 PH/42 The content-scanning code uses fopen() to create files in which to put
1940 message data. Previously it was not paying any attention to the mode of
1941 the files. Exim runs with umask(0) because the rest of the code creates
1942 files with open(), and sets the required mode explicitly. Thus, these
1943 files were ending up world-writeable. This was not a big issue, because,
1944 being within the spool directory, they were not world-accessible. I have
1945 created a function called modefopen, which takes an additional mode
1946 argument. It sets umask(777), creates the file, chmods it to the required
1947 mode, then resets the umask. All the relevant calls to fopen() in the
1948 content scanning code have been changed to use this function.
1950 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1951 to 24 hours. This avoids potential overflow problems when processing G
1952 and H retry rules. I suspect nobody ever tinkers with this value.
1954 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1956 PH/45 When the plaintext authenticator is running as a client, the server's
1957 challenges are checked to ensure they are valid base64 strings. By
1958 default, the authentication attempt is cancelled if an invalid string is
1959 received. Setting client_ignore_invalid_base64 true ignores these errors.
1960 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1961 they are received. Thus, the responses can be made to depend on the
1962 challenges. If an invalid string is ignored, an empty string is placed in
1965 PH/46 Messages that are created by the autoreply transport now contains a
1966 References: header, in accordance with RFCs 2822 and 3834.
1968 PH/47 Added authenticated_sender_force to the smtp transport.
1970 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1972 PH/49 Installed latest patch from the Sieve maintainer.
1974 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1975 was also set, the appendfile transport was unnecessarily scanning a
1976 directory of message files (e.g. for maildir delivery) to find the count
1977 of files (along with the size), even though it did not need this
1978 information. It now does the scan only if it needs to find either the
1979 size of the count of files.
1981 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1983 PH/52 Two bugs concerned with error handling when the smtp transport is
1986 (i) Exim was not creating retry information for temporary errors given
1987 for individual recipients after the DATA command when the smtp transport
1988 was used in LMTP mode. This meant that they could be retried too
1989 frequently, and not timed out correctly.
1991 (ii) Exim was setting the flag that allows error details to be returned
1992 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1993 recipients that were returned after the DATA command.
1995 PH/53 This is related to PH/52, but is more general: for any failing address,
1996 when detailed error information was permitted to be returned to the
1997 sender, but the error was temporary, then after the final timeout, only
1998 "retry timeout exceeded" was returned. Now it returns the full error as
1999 well as "retry timeout exceeded".
2001 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2002 do this, and (what is worse) MTAs that accept it.
2004 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2005 will now be deprecated.
2007 PH/56 New os.c-cygwin from the Cygwin maintainer.
2009 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2010 formats (previously only available in exim formats via -bpr, -bpru,
2011 and -bpra. Now also available in native and exiqgrep formats)
2013 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2014 with very large, slow to parse queues
2016 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2018 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2020 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2021 responses to authentication challenges, though it was showing the
2022 challenges; (ii) I've removed the CR characters from the debug output for
2025 PH/58 Allow for the insertion of a newline as well as a space when a string
2026 is turned into more than one encoded-word during RFC 2047 encoding. The
2027 Sieve code now uses this.
2029 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2030 data_4xx, lost_connection, tls_required.
2032 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2033 message was being sent as an SMTP response.
2035 PH/61 Add -l and -k options to exicyclog.
2037 PH/62 When verifying, if an address was redirected to one new address, so that
2038 verification continued, and the new address failed or deferred after
2039 having set something in $address_data, the value of $address_data was not
2040 passed back to the ACL. This was different to the case when no
2041 redirection occurred. The value is now passed back in both cases.
2043 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2044 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2045 use login_cap.h, so on its own it isn't the distinguishing feature. The
2046 new name refers directly to the setclassresources() function.
2048 PH/65 Added configuration files for NetBSD3.
2050 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2052 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2053 is preferred over IPv4.
2055 PH/68 The bounce_return_message and bounce_return_body options were not being
2056 honoured for bounces generated during the reception of non-SMTP messages.
2057 In particular, this applied to messages rejected by the ACL. This bug has
2058 been fixed. However, if bounce_return_message is true and bounce_return_
2059 body is false, the headers that are returned for a non-SMTP message
2060 include only those that have been read before the error was detected.
2061 (In the case of an ACL rejection, they have all been read.)
2063 PH/69 The HTML version of the specification is now built in a directory called
2064 spec_html instead of spec.html, because the latter looks like a path with
2065 a MIME-type, and this confuses some software.
2067 PH/70 Catch two compiler warnings in sieve.c.
2069 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2070 function verify_get_ident() calls ip_connect() to connect a socket, but
2071 if the "connect()" function timed out, ip_connect() used to close the
2072 socket. However, verify_get_ident() also closes the socket later, and in
2073 between Exim writes to the log, which may get opened at this point. When
2074 the socket was closed in ip_connect(), the log could get the same file
2075 descriptor number as the socket. This naturally causes chaos. The fix is
2076 not to close the socket in ip_connect(); the socket should be closed by
2077 the function that creates it. There was only one place in the code where
2078 this was missing, in the iplookup router, which I don't think anybody now
2079 uses, but I've fixed it anyway.
2081 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2082 well as to direct DNS lookups. Otherwise the handling of names in host
2083 lists is inconsistent and therefore confusing.
2089 PH/01 Two changes to the default runtime configuration:
2091 (1) Move the checks for relay_from_hosts and authenticated clients from
2092 after to before the (commented out) DNS black list checks.
2094 (2) Add control=submission to the relay_from_hosts and authenticated
2095 clients checks, on the grounds that messages accepted by these
2096 statements are most likely to be submissions.
2098 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2100 (1) Generate an error if the third argument for the ${prvs expansion is
2103 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2106 (3) Reset the variables that are obtained from the first argument of
2107 ${prvscheck and used in the second argument before leaving the code,
2108 because their memory is reclaimed, so using them afterwards may do
2111 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2112 one (it's much easier than Tom thought :-).
2114 (5) Because of (4), we can now allow for the use of $prvscheck_result
2115 inside the third argument.
2117 PH/03 For some reason, the default setting of PATH when running a command from
2118 a pipe transport was just "/usr/bin". I have changed it to
2121 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2122 anything to be listed in the output from -bV.
2124 PH/05 When a filter generated an autoreply, the entire To: header line was
2125 quoted in the delivery log line, like this:
2127 => >A.N.Other <ano@some.domain> <original@ddress> ...
2129 This has been changed so that it extracts the operative address. There
2130 may be more than one such address. If so, they are comma-separated, like
2133 => >ano@some.domain,ona@other.domain <original@ddress> ...
2135 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2136 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2137 not being looked up in the rDNS to get a host name, Exim was showing the
2138 IP address twice in Received: lines, even though the IP addresses were
2139 identical. For example:
2141 Received: from [1.2.3.4] (helo=[1.2.3.4])
2143 However, if the real host name was known, it was omitting the HELO data
2144 if it matched the actual IP address. This has been tidied up so that it
2145 doesn't show the same IP address twice.
2147 PH/07 When both +timestamp and +memory debugging was on, the value given by
2148 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2149 called by the debug printing, thereby overwriting the timestamp buffer.
2150 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2152 PH/08 When the original message was included in an autoreply transport, it
2153 always said "this is a copy of the message, including all the headers",
2154 even if body_only or headers_only was set. It now gives an appropriate
2157 PH/09 Applied a patch from the Sieve maintainer which:
2159 o fixes some comments
2160 o adds the (disabled) notify extension core
2161 o adds some debug output for the result of if/elsif tests
2162 o points to the current vacation draft in the documentation
2163 and documents the missing references header update
2167 o fixes a bug in processing the envelope test (when testing
2168 multiple envelope elements, the last element determinted the
2171 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2172 Electronic Mail") by including:
2174 Auto-submitted: auto-generated
2176 in the messages that it generates (bounce messages and others, such as
2177 warnings). In the case of bounce messages for non-SMTP mesages, there was
2178 also a typo: it was using "Auto_submitted" (underscore instead of
2179 hyphen). Since every message generated by Exim is necessarily in response
2180 to another message, thes have all been changed to:
2182 Auto-Submitted: auto-replied
2184 in accordance with these statements in the RFC:
2186 The auto-replied keyword:
2188 - SHOULD be used on messages sent in direct response to another
2189 message by an automatic process,
2191 - MUST NOT be used on manually-generated messages,
2193 - MAY be used on Delivery Status Notifications (DSNs) and Message
2194 Disposition Notifications (MDNs),
2196 - MUST NOT be used on messages generated by automatic or periodic
2197 processes, except for messages which are automatic responses to
2200 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2201 to the default Received: header definition.
2203 PH/12 Added log selector acl_warn_skipped (default on).
2205 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2206 variables because (a) they are in the wrong storage pool and (b) even if
2207 they were copied, it wouldn't work properly because of the caching.
2209 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2210 checking when decoding. Apparently there are clients that generate
2211 overlong encoded strings. Why am I not surprised?
2213 PH/15 If the first argument of "${if match_address" was not empty, but did not
2214 contain an "@" character, Exim crashed. Now it writes a panic log message
2215 and treats the condition as false.
2217 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2219 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2220 extension "envelope-auth". The code is finished and in agreement with
2221 other implementations, but there is no documentation so far and in fact,
2222 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2223 not changing the active code.
2225 Print executed "if" and "elsif" statements when debugging is used. This
2226 helps a great deal to understand what a filter does.
2228 Document more things not specified clearly in RFC3028. I had all this
2229 sorted out, when out of a sudden new issues came to my mind. Oops."
2231 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2234 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2235 canonical form (as documented). However, after a host name lookup from
2236 the IP address, check_host() was doing a simple string comparison with
2237 addresses acquired from the DNS when checking that the found name did
2238 have the original IP as one of its addresses. Since any found IPv6
2239 addresses are likely to be in abbreviated form, the comparison could
2240 fail. Luckily, there already exists a function for doing the comparison
2241 by converting both addresses to binary, so now that is used instead of
2242 the text comparison.
2244 PH/20 There was another similar case to PH/19, when a complete host name was
2245 given in a host list; looking up its IP address could give an abbreviated
2246 form, whereas the current host's name might or might not be abbreviated.
2247 The same fix has been applied.
2253 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2254 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2257 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2258 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2260 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2262 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2263 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2264 Also, for "Auto-Submitted", treat anything other than "no" as
2265 non-personal, in accordance with RFC 3834. (Previously it treated
2266 anything starting "auto-" as non-personal.)
2268 TF/01 The control=submission/name=... option had a problem with syntax
2269 errors if the name included a slash character. The /name= option
2270 now slurps the rest of the string, so it can include any characters
2271 but it must come last in the list of options (after /sender_retain
2274 PH/05 Some modifications to the interface to the fake nameserver for the new
2282 TK/01 Added the "success_on_redirect" address verification option. See
2283 NewStuff for rationale and an example.
2285 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2287 PH/02 Patch to exigrep to allow it to work on syslog lines.
2289 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2290 fread() to skip over the body file's header line, because in Cygwin the
2291 header line is locked and is inaccessible.
2293 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2294 co-exist for some time) to make it clear that it is the Exim ID that is
2295 referenced, not the Message-ID: header line.
2297 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2298 string_format() function, because snprintf() does not exist on all
2301 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2302 ${stat: expansion item.
2304 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2305 protocol synchronization error", to keep the pedants happy.
2307 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2308 well as for IRIX systems, when gcc is being used. See the host.c source
2311 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2313 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2316 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2317 transport and to the smtp transport in LMTP mode.
2319 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2321 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2322 run a filter in a subprocess. This could lead to confusion in subsequent
2323 lookups in the parent process. There should also be a search_tidyup() at
2324 the end of the subprocess.
2326 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2327 only if the host matched helo_try_verify_hosts, which caused the
2328 verification to occur when the EHLO/HELO command was issued. The ACL just
2329 tested the remembered result. Now, if a previous verification attempt has
2330 not happened, "verify = helo" does it there and then.
2332 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2334 TK/03 Fix log output including CR from clamd.
2336 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2337 exist provoked a memory error which could cause a segfault.
2339 PH/15 Installed PCRE 6.2
2341 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2343 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2344 of the problem. Specifically, suggested +O2 rather than +O1 for the
2347 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2349 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2350 record, the port was not correctly logged when the outgoing_port log
2351 selector was set (it logged the transort's default port).
2353 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2354 fallback_hosts, and "hosts" in the smtp transport.
2356 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2357 host errors such as "Connection refused".
2359 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2360 authentication with radiusclient 0.4.9:
2362 - Error returned from rc_read_config was caught wrongly
2363 - Username/password not passed on to radius server due to wrong length.
2365 The presumption is that some radiusclient API changes for 4.51/PH/17
2366 were not taken care of correctly. The code is still untested by me (my
2367 Linux distribution still has 0.3.2 of radiusclient), but it was
2368 contributed by a Radius user.
2370 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2371 expanding the "port" option of the smtp transport.
2373 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2374 while reading a MIME header. Thanks to Tom Hughes for a patch.
2376 PH/24 Include config.h inside local_scan.h so that configuration settings are
2379 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2380 that in an ACL for RCPT (for example), you can examine exactly what was
2383 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2384 commands, but it was not correctly comparing the address with the actual
2385 client host address. Thus, it would show the EHLO address in Received:
2386 header lines when this was not necessary.
2388 PH/27 Added the % operator to ${eval:}.
2390 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2391 it should be ignoring failures (because with -C, for example, it has lost
2392 privilege). It wasn't ignoring creation failures other than "already
2395 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2398 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2399 because an input line was too long, either on its own, or by virtue of
2400 too many continuations, the temporary file was not being removed, and the
2401 return code was incorrect.
2403 PH/31 Missing "BOOL" in function definition in filtertest.c.
2405 PH/32 Applied Sieve patches from the maintainer.
2407 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2409 PH/33 Added "verify = not_blind".
2411 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2412 Local/Makefile (with some defaults set). These are used in built scripts
2413 such as exicyclog, but they have never been used in the exim_install
2414 script (though there are many overriding facilities there). I have
2415 arranged that the exim_install script now takes note of these two
2418 PH/35 Installed configuration files for Dragonfly.
2420 PH/36 When a locally submitted message by a trusted user did not contain a
2421 From: header, and the sender address was obtained from -f or from an SMTP
2422 MAIL command, and the trusted user did not use -F to supply a sender
2423 name, $originator_name was incorrectly used when constructing a From:
2424 header. Furthermore, $originator_name was used for submission mode
2425 messages from external hosts without From: headers in a similar way,
2426 which is clearly wrong.
2428 PH/37 Added control=suppress_local_fixups.
2430 PH/38 When log_selector = +received_sender was set, and the addition of the
2431 sender made the log line's construction buffer exactly full, or one byte
2432 less than full, an overflow happened when the terminating "\n" was
2435 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2436 when the result of a list match is failure because a DNS lookup failed.
2438 PH/40 RM_COMMAND is now used in the building process.
2440 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2441 the "build-* directories that it finds.
2443 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2444 address in a domain literal was a prefix of an interface address.
2446 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2447 when verifying a sender address, unless rewrite_headers is false.
2449 PH/44 Wrote a long comment about why errors_to addresses are verified as
2450 recipients, not senders.
2452 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2453 the ratelimit ACL was added.
2455 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2457 PH/46 Added extra information about PostgreSQL errors to the error string.
2459 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2460 avoiding the need to install special zones in a real server. This is
2461 backwards compatible; if it can't find the fake resolver, it drops back.
2462 Thus, both old and new test suites can be run.
2464 TF/02 Added util/ratelimit.pl
2466 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2467 clock is set back in time.
2469 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2470 Candler <B.Candler@pobox.com>.
2472 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2473 OK for addresses that are the result of redirections.
2475 PH/48 A number of further additions for the benefit of the new test suite,
2476 including a fake gethostbyname() that interfaces to the fake DNS resolver
2479 TF/06 The fix for widen_domains has also been applied to qualify_single and
2480 search_parents which are the other dnslookup options that can cause
2483 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2486 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2488 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2489 service" if it encountered an MX record with an empty target hostname.
2490 The message is now "an MX or SRV record indicated no SMTP service".
2492 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2493 if the DNS of the sending site is misconfigured. This is quite a
2494 common situation. This change restores the behaviour of treating a
2495 helo verification defer as a failure.
2497 PH/51 If self=fail was set on a router, the bounce message did not include the
2498 actual error message.
2504 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2506 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2507 command itself ended in error, the underlying message about the transport
2508 filter timeout was being overwritten with the pipe command error. Now the
2509 underlying error message should be appended to the second error message.
2511 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2513 PH/02 Reduce the amount of output that "make" produces by default. Full output
2514 can still be requested.
2516 PH/03 The warning log line about a condition test deferring for a "warn" verb
2517 was being output only once per connection, rather than after each
2518 occurrence (because it was using the same function as for successful
2519 "warn" verbs). This seems wrong, so I have changed it.
2521 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2522 it should not have, which might have caused a crash in the right
2523 circumstances, but probably never did.
2525 PH/04 Installed a modified version of Tony Finch's patch to make submission
2526 mode fix the return path as well as the Sender: header line, and to
2527 add a /name= option so that you can make the user's friendly name appear
2530 TF/03 Added the control = fakedefer ACL modifier.
2532 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2533 Mark Lowes for thorough testing.
2535 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2537 TK/03 Merged latest SRS patch from Miles Wilton.
2539 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2540 with the definition in sysexits.h (which is #included earlier).
2541 Fortunately, Exim does not actually use EX_OK. The code used to try to
2542 preserve the sysexits.h value, by assumimg that macro definitions were
2543 scanned for macro replacements. I have been disabused of this notion,
2544 so now the code just undefines EX_OK before #including unistd.h.
2546 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2547 in the smtp transport. When a block could not be written in a single
2548 write() function, the timeout was being re-applied to each part-write.
2549 This seems wrong - if the receiver was accepting one byte at a time it
2550 would take for ever. The timeout is now adjusted when this happens. It
2551 doesn't have to be particularly precise.
2553 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2554 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2556 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2557 without a domain if the check to <postmaster@domain> fails.
2559 SC/01 Eximstats: added -xls and the ability to specify output files
2560 (patch written by Frank Heydlauf).
2562 SC/02 Eximstats: use FileHandles for outputing results.
2564 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2566 SC/04 Eximstats: fixed display of large numbers with -nvr option
2568 SC/05 Eximstats: fixed merging of reports with empty tables.
2570 SC/06 Eximstats: added the -include_original_destination flag
2572 SC/07 Eximstats: removed tabs and trailing whitespace.
2574 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2576 TK/06 MBOX spool code: Add real "From " MBOX separator line
2577 so the .eml file is really in mbox format (even though
2578 most programs do not really care). Patch from Alex Miller.
2580 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2581 The latter is generated from $received_to and is only set if the
2582 message has one envelope recipient. SA can use these headers,
2583 obviously out-of-the-box. Patch from Alex Miller.
2585 PH/08 The ${def test on a variable was returning false if the variable's
2586 value was "0", contrary to what the specification has always said!
2587 The result should be true unless the variable is empty.
2589 PH/09 The syntax error of a character other than { following "${if
2590 def:variable_name" (after optional whitespace) was not being diagnosed.
2591 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2592 accidental colon was present, for example, could give incorrect results.
2594 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2595 result is used (not including appendfile, where other changes are about
2598 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2599 This involved changing a lot of size variables from int to off_t. It
2600 should work with maildirs and everything.
2602 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2603 spamd dying while we are connected to it.
2605 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2608 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2609 function for BDB 4.3.
2611 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2613 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2614 the sources for PCRE have been re-arranged and more files are now
2617 PH/15 The code I had for printing potentially long long variables in PH/11
2618 above was not the best (it lost precision). The length of off_t variables
2619 is now inspected at build time, and an appropriate printing format (%ld
2620 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2621 to be "long long int" or "long int". This is needed for the internal
2622 formatting function string_vformat().
2624 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2625 the configuration file to be ":syslog", then the script "guesses" where
2626 the logs files are, rather than using the compiled in default. In our
2627 case the guess is not the same as the compiled default, so the script
2628 suddenly stopped working when I started to use syslog. The patch checks
2629 to see if log_file_path is "". If so, it attempts to read it from exim
2630 with no configuration file to get the compiled in version, before it
2631 falls back to the previous guessing code."
2633 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2634 implementing BATV in an Exim configuration. See NewStuff for the gory
2637 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2638 Makefile that are specific to HP-UX.
2640 PH/18 If the "use_postmaster" option was set for a recipient callout together
2641 with the "random" option, the postmaster address was used as the MAIL
2642 FROM address for the random test, but not for the subsequent recipient
2643 test. It is now used for both.
2645 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2646 patch removes a few documentation additions to RFC 3028, because the
2647 latest draft now contains them. It adds the new en;ascii-case comparator
2648 and a new error check for 8bit text in MIME parts. Comparator and
2649 require names are now matched exactly. I enabled the subaddress
2650 extension, but it is not well tested yet (read: it works for me)."
2652 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2653 rework some of the code of TK/09 above to avoid the hardwired use of
2654 "%lld" and "long long". Replaced the call to snprintf() with a call to
2657 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2658 records point to non-existent hosts", "retry timeout exceeded", and
2659 "retry time not reached for any host after a long failure period".
2661 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2662 experimental DomainKeys support:
2664 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2665 (2) On an error such as an illegally used "control", the wrong name for
2666 the control was given.
2668 These problems did NOT occur unless DomainKeys support was compiled.
2670 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2672 PH/24 Added ${if match_ip condition.
2674 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2675 databases so that it will be absolutely obvious if a crash occurs in the
2676 DB library. This is a regular occurrence (often caused by mis-matched
2679 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2680 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2681 picked up on a user's system that detects such things. There doesn't seem
2682 to be a gcc warning option for this - only an attribute that has to be
2683 put on the function's prototype. It seems that in Fedora Core 4 they have
2684 set this on a number of new functions. No doubt there will be more in due
2687 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2688 specify a transport. However, if an address that was verified by such a
2689 router was the subject of a callout, Exim crashed because it tried to
2690 read the rcpt_include_affixes from the non-existent transport. Now it
2691 just assumes that the setting of that option is false. This bug was
2692 introduced by 4.51/PH/31.
2694 PH/28 Changed -d+all to exclude +memory, because that information is very
2695 rarely of interest, but it makes the output a lot bigger. People tend to
2696 do -d+all out of habit.
2698 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2699 code in os-type was giving problems when libc.so lives in lib64, like on
2702 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2703 aren't the modern standard, and it seems that some systems' include files
2704 don't always have them. Exim was already checking for some of the newer
2705 ones like T_AAAA, and defining it itself. I've added checks for all the
2706 record types that Exim uses.
2708 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2709 not automatically generating a new one, as it is supposed to. This
2710 prevented TLS from working. If the file did exist, but contained invalid
2711 data, a new version was generated, as expected. It was only the case of a
2712 non-existent file that was broken.
2714 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2715 with a change in libdomainkeys > 0.64.
2717 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2718 from DNS. If the selector record carries the flag, it now has
2719 precedence over the domain-wide flag.
2721 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2723 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2724 the use of a port name that isn't defined in /etc/services) occurred, the
2725 message was deferred as in a normal delivery, and thus remained on the
2726 spool, instead of being failed because of the mua_wrapper setting. This
2727 is now fixed, and I tidied up some of the mua_wrapper messages at the
2730 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2731 the messages in a hash of arrays rather than using individual hashes.
2732 This is a bit cleaner and results in dramatic memory savings, albeit
2733 at a slight CPU cost.
2735 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2736 as requested by Marc Sherman.
2738 SC/10 Eximstats: added histograms for user specified patterns as requested
2741 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2743 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2744 fopen() in the content-scanning modules that did not already have it.
2750 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2751 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2753 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2755 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2757 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2758 to test Sieve filters that use "vacation".
2760 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2761 that changes the way the GnuTLS parameters are stored in the cache file.
2762 The new format can be generated externally. For backward compatibility,
2763 if the data in the cache doesn't make sense, Exim assumes it has read an
2764 old-format file, and it generates new data and writes a new file. This
2765 means that you can't go back to an older release without removing the
2768 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2769 work if there are any delivery delays because "one_time" forces the
2770 parent to be marked "delivered", so its unseen clone is never tried
2771 again. For this reason, Exim now forbids the simultaneous setting of
2774 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2775 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2776 entry if you want to know the details. The fix, however, neglected to
2777 consider the case when local delivery batching is involved. The test for
2778 "previously delivered" was not happening when checking to see if an
2779 address could be batched with a previous (undelivered) one; under
2780 certain circumstances this could lead to multiple deliveries to the same
2783 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2784 in its include files, and this causes problems building Exim.
2786 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2787 header_syntax) but Exim was just ignoring anything given after a slash.
2788 In particular, this caused confusion with an attempt to use "verify =
2789 reverse_host_lookup/defer_ok". An error is now given when options are
2790 supplied for verify items that do not have them. (Maybe reverse_host_
2791 lookup should have a defer_ok option, but that's a different point.)
2793 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2794 defined by RFC 821) to 2048, because there were problems with some AUTH
2795 commands, and RFC 1869 says the size should be increased for extended
2796 SMTP commands that take arguments.
2798 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2801 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2802 "unknown" error; now it says that the functionality isn't in the binary.
2804 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2805 an address' error message when a string expansion fails (syntax or
2806 whatever). Otherwise the password may appear in the log. Following change
2807 PH/42 below, there is no longer a chance of it appearing in a bounce
2810 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2812 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2813 of its addresses was ever tried. (Bugzilla bug #2.)
2815 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2816 the result incorrectly in the debug output. (It correctly added a newline
2817 to what was transported.)
2819 TF/01 Added $received_time.
2821 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2822 commented out examples of how to interface to a virus scanner and to
2823 SpamAssassin. Also added commented examples of av_scanner and
2824 spamd_address settings.
2826 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2827 and controls are allowed in which ACLs. There were a couple of minor
2828 errors. Some of the entries in the conditions table (which is a table of
2829 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2830 negation of where the condition IS allowed.
2832 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2834 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2835 header file does not have a version number, so I've had to invent a new
2836 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2837 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2838 radiusclient), but it was contributed by a Radius user.
2840 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2841 files or directories, for OpenSSL.
2843 PH/19 When an Exim process that is running as root has to create an Exim log
2844 file, it does so in a subprocess that runs as exim:exim so as to get the
2845 ownership right at creation (otherwise, other Exim processes might see
2846 the file with the wrong ownership). There was no test for failure of this
2847 fork() call, which would lead to the process getting stuck as it waited
2848 for a non-existent subprocess. Forks do occasionally fail when resources
2849 run out. I reviewed all the other calls to fork(); they all seem to check
2852 PH/20 When checking for unexpected SMTP input at connect time (before writing
2853 the banner), Exim was not dealing correctly with a non-positive return
2854 from the read() function. If the client had disconnected by this time,
2855 the result was a log entry for a synchronization error with an empty
2856 string after "input=" when read() returned zero. If read() returned -1
2857 (an event I could not check), uninitialized data bytes were printed.
2858 There were reports of junk text (parts of files, etc) appearing after
2861 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2863 PH/22 Added support for macro redefinition, and (re)definition in between
2864 driver and ACL definitions.
2866 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2867 forgetting to use the resulting value; it was using the unexpanded value.
2869 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2870 hadn't been configured. The fix is from Juergen Kreileder, who
2871 understands it better than I do:
2873 "Here's what I see happening with three configured cyrus_sasl
2874 authenticators configured (plain, login, cram-md5):
2876 On startup auth_cyrus_sasl_init() gets called for each of these.
2877 This means three calls to sasl_listmech() without a specified mech_list.
2878 => SASL tests which mechs of all available mechs actually work
2879 => three warnings about OTP not working
2880 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2882 With the patch, sasl_listmech() also gets called three times. But now
2883 SASL's mech_list option is set to the server_mech specified in the the
2884 authenticator. Or in other words, the answer from sasl_listmech()
2885 gets limited to just the mech you're testing for (which is different
2887 => the return list contains just 'plain' or 'login', 'cram-md5' or
2888 nothing depending on the value of ob->server_mech.
2890 I've just tested the patch: Authentication still works fine,
2891 unavailable mechs specified in the exim configuration are still
2892 caught, and the auth.log warnings about OTP are gone."
2894 PH/25 When debugging is enabled, the contents of the command line are added
2895 to the debugging output, even when log_selector=+arguments is not
2898 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2899 answer is "GNU", and only if the return is "GNU/something" is the answer
2902 PH/27 $acl_verify_message is now set immediately after the failure of a
2903 verification in an ACL, and so is available in subsequent modifiers. In
2904 particular, the message can be preserved by coding like this:
2906 warn !verify = sender
2907 set acl_m0 = $acl_verify_message
2909 Previously, $acl_verify_message was set only while expanding "message"
2910 and "log_message" when a very denied access.
2912 PH/28 Modified OS/os.c-Linux with
2914 -#ifndef OS_LOAD_AVERAGE
2915 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2917 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2918 nomenclature these days.)
2920 PH/29 Installed patch from the Sieve maintainer that adds the options
2921 sieve_useraddress and sieve_subaddress to the redirect router.
2923 PH/30 In these circumstances:
2924 . Two addresses routed to the same list of hosts;
2925 . First host does not offer TLS;
2926 . First host accepts first address;
2927 . First host gives temporary error to second address;
2928 . Second host offers TLS and a TLS session is established;
2929 . Second host accepts second address.
2930 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2931 and peerdn, if requested) that were in fact used only for the second
2934 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2935 attention to any local part prefix or suffix that was matched by the
2936 router that accepted the address. It now behaves in the same way as it
2937 does for delivery: the affixes are removed from the local part unless
2938 rcpt_include_affixes is set on the transport.
2940 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2941 timeout during the DATA phase of an incoming message.
2943 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2944 applied a patch sanctioned by the Sieve maintainer.
2946 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2947 the uid or gid is negative. A case of a negative gid caused this to be
2948 noticed. The fix allows for either to be negative.
2950 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2951 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2954 PH/36 The change PH/12 above was broken. Fixed it.
2956 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2957 the grounds that routing the same address twice would always produce the
2958 same answer. This might have been true once, but it is certainly no
2959 longer true now. Routing a child address may depend on the previous
2960 routing that produced that child. Some complicated redirection strategies
2961 went wrong when messages had multiple recipients, and made Exim's
2962 behaviour dependent on the order in which the addresses were given.
2964 I have moved the duplicate checking until after the routing is complete.
2965 Exim scans the addresses that are assigned to local and remote
2966 transports, and removes any duplicates. This means that more work will be
2967 done, as duplicates will always all be routed, but duplicates are
2968 presumably rare, so I don't expect this is of any significance.
2970 For deliveries to pipes, files, and autoreplies, the duplicate checking
2971 still happens during the routing process, since they are not going to be
2974 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2975 It corrects a timeout issue with spamd. This is Ian's comment: "The
2976 background is that sometimes spamd either never reads data from a
2977 connection it has accepted, or it never writes response data. The exiscan
2978 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2979 blindly assumes that writes won't block so it may never time out."
2981 PH/39 Allow G after quota size as well as K and M.
2983 PH/40 The value set for $authenticated_id in an authenticator may not contain
2984 binary zeroes or newlines because the value is written to log lines and
2985 to spool files. There was no check on this. Now the value is run through
2986 the string_printing() function so that such characters are converted to
2987 printable escape sequences.
2989 PH/41 $message_linecount is a new variable that contains the total number of
2990 lines in the message. Compare $body_linecount, which is the count for the
2993 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2994 bounce and delay warning messages, except in certain special cases, which
2997 (a) An SMTP error message from a remote host;
2998 (b) A message specified in a :fail: redirection;
2999 (c) A message specified in a "fail" command in a system filter;
3000 (d) A message specified in a FAIL return from the queryprogram router;
3001 (e) A message specified by the cannot_route_message router option.
3003 In these cases only, Exim does include the error details in bounce and
3004 warning messages. There are also a few cases where bland messages such
3005 as "unrouteable address" or "local delivery error" are given.
3007 PH/43 $value is now also set for the "else" part of a ${run expansion.
3009 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3010 being worked on, but at least Exim now implements the latest version to
3013 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3014 process to complete was treated as a delivery failure, a timeout while
3015 writing the message to the pipe was logged, but erroneously treated as a
3016 successful delivery. Such timeouts include transport filter timeouts. For
3017 consistency with the overall process timeout, these timeouts are now
3018 treated as errors, giving rise to delivery failures by default. However,
3019 there is now a new Boolean option for the pipe transport called
3020 timeout_defer, which, if set TRUE, converts the failures into defers for
3021 both kinds of timeout. A transport filter timeout is now identified in
3024 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3025 systems where "make" and "gmake" are different, calling "gmake" at top
3026 level broke things. I've arranged for the value of $(MAKE) to be passed
3027 from the Makefile to this script so that it can call the same version of
3031 A note about Exim versions 4.44 and 4.50
3032 ----------------------------------------
3034 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3035 changes of various kinds. As a consequence, a big documentation update was
3036 needed. This delayed the release for rather longer than seemed good, especially
3037 in the light of a couple of (minor) security issues. Therefore, the changes
3038 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3039 release. So 4.44 and 4.50 are in effect two different branches that both start
3042 I have left the 4.50 change log unchanged; it contains all the changes since
3043 4.43. The change log for 4.44 is below; many of its items are identical to
3044 those for 4.50. This seems to be the most sensible way to preserve the
3045 historical information.
3051 1. Minor wording change to the doc/README.SIEVE file.
3053 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3054 computation of the current number of files was incorrect.
3056 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3057 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3060 4. Give more explanation in the error message when the command for a transport
3061 filter fails to execute.
3063 5. There are several places where Exim runs a non-Exim command in a
3064 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3065 was being done only for the command run by the queryprogram router. It is
3066 now done for all such subprocesses. The other cases are: ${run, transport
3067 filters, and the commands run by the lmtp and pipe transports.
3069 6. Added CONFIGURE_GROUP build-time option.
3071 7. Some older OS have a limit of 256 on the maximum number of file
3072 descriptors. Exim was using setrlimit() to set 1000 as a large value
3073 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3074 systems. I've change it so that if it can't get 1000, it tries for 256.
3076 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3077 was an oversight, and furthermore, ever since the addition of extra
3078 controls (e.g. 4.43/32), the checks on when to allow different forms of
3079 "control" were broken. There should now be diagnostics for all cases when a
3080 control that does not make sense is encountered.
3082 9. Added the /retain_sender option to "control=submission".
3084 10. $recipients is now available in the predata ACL (oversight).
3086 11. Tidy the search cache before the fork to do a delivery from a message
3087 received from the command line. Otherwise the child will trigger a lookup
3088 failure and thereby defer the delivery if it tries to use (for example) a
3089 cached ldap connection that the parent has called unbind on.
3091 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3092 of $address_data from the recipient verification was clobbered by the
3093 sender verification.
3095 13. The value of address_data from a sender verification is now available in
3096 $sender_address_data in subsequent conditions in the ACL statement.
3098 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3100 15. Added a new option "connect=<time>" to callout options, to set a different
3103 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3104 was its contents. (It was OK if the option was not defined at all.)
3106 17. A "Completed" log line is now written for messages that are removed from
3107 the spool by the -Mrm option.
3109 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3110 information about exactly what failed.
3112 19. Added -dd to debug only the daemon process.
3114 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3115 handles timeouts, both on the server side and network timeouts. Renamed the
3116 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3118 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3119 It is now set to "smtps".
3121 22. $host_address is now set to the target address during the checking of
3122 ignore_target_hosts.
3124 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3125 being passed; this would have caused $sender_host_name to have been used if
3126 matching the list had actually called for a host name (not very likely,
3127 since this list is usually IP addresses). A host name is now passed as
3130 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3131 code that specifies a non-restarting handler (typically sigaction() in
3132 modern systems) in an attempt to fix a rare and obscure crash bug.
3134 25. Narrowed the window for a race in the daemon that could cause it to ignore
3135 SIGCHLD signals. This is not a major problem, because they are used only to
3136 wake it up if nothing else does.
3138 26. A malformed maildirsize file could cause Exim to calculate negative values
3139 for the mailbox size or file count. Odd effects could occur as a result.
3140 The maildirsize information is now recalculated if the size or filecount
3143 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3144 support for a long time. Removed HAVE_SYS_VFS_H.
3146 28. Installed the latest version of exipick from John Jetmore.
3148 29. In an address list, if the pattern was not a regular expression, an empty
3149 subject address (from a bounce message) matched only if the pattern was an
3150 empty string. Non-empty patterns were not even tested. This was the wrong
3151 because it is perfectly reasonable to use an empty address as part of a
3152 database query. An empty address is now tested by patterns that are
3153 lookups. However, all the other forms of pattern expect the subject to
3154 contain a local part and a domain, and therefore, for them, an empty
3155 address still always fails if the pattern is not itself empty.
3157 30. Exim went into a mad DNS loop when attempting to do a callout where the
3158 host was specified on an smtp transport, and looking it up yielded more
3159 than one IP address.
3161 31. Re-factored the code for checking spool and log partition space into a
3162 function that finds that data and another that does the check. The former
3163 is then used to implement four new variables: $spool_space, $log_space,
3164 $spool_inodes, and $log_inodes.
3166 32. The RFC2047 encoding function was originally intended for short strings
3167 such as real names; it was not keeping to the 75-character limit for
3168 encoded words that the RFC imposes. It now respects the limit, and
3169 generates multiple encoded words if necessary. To be on the safe side, I
3170 have increased the buffer size for the ${rfc2047: expansion operator from
3173 33. It is now permitted to omit both strings after an "if" condition; if the
3174 condition is true, the result is "true". As before, when the second string
3175 is omitted, a false condition yields an empty string. This makes it less
3176 cumbersome to write custom ACL and router conditions.
3178 34. Failure to deliver a bounce message always caused it to be frozen, even if
3179 there was an errors_to setting on the router. The errors_to setting is now
3182 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3183 canonical form (fully expanded) before being placed in
3184 $sender_host_address.
3186 36. The table in the code that translates DNS record types into text (T_A to
3187 "A" for instance) was missing entries for NS and CNAME. It is just possible
3188 that this could have caused confusion if both these types were looked up
3189 for the same domain, because the text type is used as part of Exim's
3190 per-process caching. But the chance of anyone hitting this buglet seems
3193 37. The dnsdb lookup has been extended in a number of ways.
3195 (1) There is a new type, "zns", which walks up the domain tree until it
3196 finds some nameserver records. It should be used with care.
3198 (2) There is a new type, "mxh", which is like "mx" except that it returns
3199 just the host names, not the priorities.
3201 (3) It is now possible to give a list of domains (or IP addresses) to be
3202 looked up. The behaviour when one of the lookups defers can be
3203 controlled by a keyword.
3205 (4) It is now possible to specify the separator character for use when
3206 multiple records are returned.
3208 38. The dnslists ACL condition has been extended: it is now possible to supply
3209 a list of IP addresses and/or domains to be looked up in a particular DNS
3212 39. Added log_selector=+queue_time_overall.
3214 40. When running the queue in the test harness, wait just a tad after forking a
3215 delivery process, to get repeatability of debugging output.
3217 41. Include certificate and key file names in error message when GnuTLS fails
3218 to set them up, because the GnuTLS error message doesn't include the name
3219 of the failing file when there is a problem reading it.
3221 42. Allow both -bf and -bF in the same test run.
3223 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3225 44. The "Exiscan patch" is now merged into the mainline Exim source.
3227 45. Sometimes the final signoff response after QUIT could fail to get
3228 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3229 < 0 before doing a fflush(). This bug looks as though it goes back to the
3230 introduction of TLS in release 3.20, but "sometimes" must have been rare
3231 because the tests only now provoked it.
3233 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3234 (this can affect the format of dates).
3236 47. exim_tidydb, when checking for the continued existence of a message for
3237 which it has found a message-specific retry record, was not finding
3238 messages that were in split spool directories. Consequently, it was
3239 deleting retry records that should have stayed in existence.
3241 48. Steve fixed some bugs in eximstats.
3243 49. The SPA authentication driver was not abandoning authentication and moving
3244 on to the next authenticator when an expansion was forced to fail,
3245 contradicting the general specification for all authenticators. Instead it
3246 was generating a temporary error. It now behaves as specified.
3248 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3249 (the order specifies the preference for clients). The order is now AES256,
3250 AES128, 3DES, ARCFOUR128.
3252 51. Small patch to Sieve code - explicitly set From: when generating an
3255 52. Exim crashed if a remote delivery caused a very long error message to be
3256 recorded - for instance if somebody sent an entire SpamAssassin report back
3257 as a large number of 550 error lines. This bug was coincidentally fixed by
3258 increasing the size of one of Exim's internal buffers (big_buffer) that
3259 happened as part of the Exiscan merge. However, to be on the safe side, I
3260 have made the code more robust (and fixed the comments that describe what
3263 53. Now that there can be additional text after "Completed" in log lines (if
3264 the queue_time_overall log selector is set), a one-byte patch to exigrep
3265 was needed to allow it to recognize "Completed" as not the last thing in
3268 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3269 patch that reportedly fixes this has been added. I am not expert enough to
3270 create a test for it. This is what the patch creator wrote:
3272 "I found a little strange behaviour of ldap code when working with
3273 Windows 2003 AD Domain, where users was placed in more than one
3274 Organization Units. When I tried to give exim partial DN, the exit code
3275 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3276 But simultaneously result of request was absolutely normal ldap result,
3277 so I produce this patch..."
3279 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3280 REFERENCE, so I have modified the code to exclude the patch when that macro
3283 55. Some experimental protocols are using DNS PTR records for new purposes. The
3284 keys for these records are domain names, not reversed IP addresses. The
3285 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3286 leaves it alone. Component reversal etc. now happens only for IP addresses.
3289 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3291 57. Double the size of the debug message buffer (to 2048) so that more of very
3292 long debug lines gets shown.
3294 58. The exicyclog utility now does better if the number of log files to keep
3295 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3297 59. Two changes related to the smtp_active_hostname option:
3299 (1) $smtp_active_hostname is now available as a variable.
3300 (2) The default for smtp_banner uses $smtp_active_hostname instead
3301 of $primary_hostname.
3303 60. The host_aton() function is supposed to be passed a string that is known
3304 to be a valid IP address. However, in the case of IPv6 addresses, it was
3305 not checking this. This is a hostage to fortune. Exim now panics and dies
3306 if the condition is not met. A case was found where this could be provoked
3307 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3308 components; fortuitously, this particular loophole had already been fixed
3309 by change 4.50/55 above.
3311 If there are any other similar loopholes, the new check in host_aton()
3312 itself should stop them being exploited. The report I received stated that
3313 data on the command line could provoke the exploit when Exim was running as
3314 exim, but did not say which command line option was involved. All I could
3315 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3316 running as the user.
3319 61. There was a buffer overflow vulnerability in the SPA authentication code
3320 (which came originally from the Samba project). I have added a test to the
3321 spa_base64_to_bits() function which I hope fixes it.
3324 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3325 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3327 63. The daemon start-up calls getloadavg() while still root for those OS that
3328 need the first call to be done as root, but it missed one case: when
3329 deliver_queue_load_max is set with deliver_drop_privilege. This is
3330 necessary for the benefit of the queue runner, because there is no re-exec
3331 when deliver_drop_privilege is set.
3333 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3334 This has been fixed.
3336 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3337 was in use, was not putting the data itself into the right store pool;
3338 consequently, it could be overwritten for a subsequent message in the same
3339 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3342 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3344 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3345 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3346 the function were treating the return as a boolean value, which happened to
3347 work because 0=false and not-0=true, but is not correct code.
3349 68. The host_aton() function was not handling scoped IPv6 addresses (those
3350 with, for example, "%eth0" on the end) correctly.
3352 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3353 negated items (that is, ~something) in unsigned ints. Some compilers
3354 apparently mutter when there is no cast.
3356 70. If an address verification called from an ACL failed, and did not produce a
3357 user-specific message (i.e. there was only a "system" message), nothing was
3358 put in $acl_verify_message. In this situation, it now puts the system
3361 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3362 session; change 4.31/43 added the unwanted input to the log line - except
3363 that it did not do this in the start of session case. It now does.
3365 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3366 This is wrong and can cause the other end to generate a synchronization
3367 error if it is another Exim or anything else that does the synchronization
3368 check. A QUIT command is no longer sent after a timeout.
3370 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3371 during host lookups.
3373 74. The defer_ok option of callout verification was not working if it was used
3374 when verifying addresses in header lines, that is, for this case:
3376 verify = header_sender/callout=defer_ok
3378 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3379 those file descriptors could be used for SMTP connections. If anything
3380 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3381 could be sent to the SMTP client, causing chaos. The daemon now opens
3382 stdin, stdout, and stderr to /dev/null when it puts itself into the
3385 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3386 log by default. The user can override this with suitable Perl magic.
3388 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3389 the log message when discard triggers, was not working for the DATA ACL or
3390 for the non-SMTP ACL.
3392 78. Error message wording change in sieve.c.
3394 79. If smtp_accept_max_per_host was set, the number of connections could be
3395 restricted to fewer than expected, because the daemon was trying to set up
3396 a new connection before checking whether the processes handling previous
3397 connections had finished. The check for completed processes is now done
3398 earlier. On busy systems, this bug wouldn't be noticed because something
3399 else would have woken the daemon, and it would have reaped the completed
3402 80. If a message was submitted locally by a user whose login name contained one
3403 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3404 It caused a spool format error. I have fixed the spool reading code. A
3405 related problem was that the "from" clause in the Received: line became
3406 illegal because of the space(s). It is now covered by ${quote_local_part.
3408 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3411 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3413 83. Patch from Sieve maintainer to fix unterminated string problem in
3414 "vacation" handling.
3416 84. Some minor changes to the Linux configuration files to help with other
3417 OS variants using glibc.
3419 85. One more patch for Sieve to update vacation handling to latest spec.
3422 ----------------------------------------------------
3423 See the note above about the 4.44 and 4.50 releases.
3424 ----------------------------------------------------
3430 1. Change 4.43/35 introduced a bug that caused file counts to be
3431 incorrectly computed when quota_filecount was set in an appendfile
3434 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3435 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3438 3. Give more explanation in the error message when the command for a transport
3439 filter fails to execute.
3441 4. There are several places where Exim runs a non-Exim command in a
3442 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3443 was being done only for the command run by the queryprogram router. It is
3444 now done for all such subprocesses. The other cases are: ${run, transport
3445 filters, and the commands run by the lmtp and pipe transports.
3447 5. Some older OS have a limit of 256 on the maximum number of file
3448 descriptors. Exim was using setrlimit() to set 1000 as a large value
3449 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3450 systems. I've change it so that if it can't get 1000, it tries for 256.
3452 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3453 was an oversight, and furthermore, ever since the addition of extra
3454 controls (e.g. 4.43/32), the checks on when to allow different forms of
3455 "control" were broken. There should now be diagnostics for all cases when a
3456 control that does not make sense is encountered.
3458 7. $recipients is now available in the predata ACL (oversight).
3460 8. Tidy the search cache before the fork to do a delivery from a message
3461 received from the command line. Otherwise the child will trigger a lookup
3462 failure and thereby defer the delivery if it tries to use (for example) a
3463 cached ldap connection that the parent has called unbind on.
3465 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3466 of $address_data from the recipient verification was clobbered by the
3467 sender verification.
3469 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3470 was its contents. (It was OK if the option was not defined at all.)
3472 11. A "Completed" log line is now written for messages that are removed from
3473 the spool by the -Mrm option.
3475 12. $host_address is now set to the target address during the checking of
3476 ignore_target_hosts.
3478 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3479 being passed; this would have caused $sender_host_name to have been used if
3480 matching the list had actually called for a host name (not very likely,
3481 since this list is usually IP addresses). A host name is now passed as
3484 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3485 code that specifies a non-restarting handler (typically sigaction() in
3486 modern systems) in an attempt to fix a rare and obscure crash bug.
3488 15. Narrowed the window for a race in the daemon that could cause it to ignore
3489 SIGCHLD signals. This is not a major problem, because they are used only to
3490 wake it up if nothing else does.
3492 16. A malformed maildirsize file could cause Exim to calculate negative values
3493 for the mailbox size or file count. Odd effects could occur as a result.
3494 The maildirsize information is now recalculated if the size or filecount
3497 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3498 support for a long time. Removed HAVE_SYS_VFS_H.
3500 18. Updated exipick to current release from John Jetmore.
3502 19. Allow an empty sender to be matched against a lookup in an address list.
3503 Previously the only cases considered were a regular expression, or an
3506 20. Exim went into a mad DNS lookup loop when doing a callout where the
3507 host was specified on the transport, if the DNS lookup yielded more than
3510 21. The RFC2047 encoding function was originally intended for short strings
3511 such as real names; it was not keeping to the 75-character limit for
3512 encoded words that the RFC imposes. It now respects the limit, and
3513 generates multiple encoded words if necessary. To be on the safe side, I
3514 have increased the buffer size for the ${rfc2047: expansion operator from
3517 22. Failure to deliver a bounce message always caused it to be frozen, even if
3518 there was an errors_to setting on the router. The errors_to setting is now
3521 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3522 canonical form (fully expanded) before being placed in
3523 $sender_host_address.
3525 24. Updated eximstats to version 1.33
3527 25. Include certificate and key file names in error message when GnuTLS fails
3528 to set them up, because the GnuTLS error message doesn't include the name
3529 of the failing file when there is a problem reading it.
3531 26. Expand error message when OpenSSL has problems setting up cert/key files.
3534 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3535 (this can affect the format of dates).
3537 28. exim_tidydb, when checking for the continued existence of a message for
3538 which it has found a message-specific retry record, was not finding
3539 messages that were in split spool directories. Consequently, it was
3540 deleting retry records that should have stayed in existence.
3542 29. eximstats updated to version 1.35
3543 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3544 1.35 - bugfix such that pie charts by volume are generated correctly
3546 30. The SPA authentication driver was not abandoning authentication and moving
3547 on to the next authenticator when an expansion was forced to fail,
3548 contradicting the general specification for all authenticators. Instead it
3549 was generating a temporary error. It now behaves as specified.
3551 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3552 (the order specifies the preference for clients). The order is now AES256,
3553 AES128, 3DES, ARCFOUR128.
3555 31. Small patch to Sieve code - explicitly set From: when generating an
3558 32. Exim crashed if a remote delivery caused a very long error message to be
3559 recorded - for instance if somebody sent an entire SpamAssassin report back
3560 as a large number of 550 error lines. This bug was coincidentally fixed by
3561 increasing the size of one of Exim's internal buffers (big_buffer) that
3562 happened as part of the Exiscan merge. However, to be on the safe side, I
3563 have made the code more robust (and fixed the comments that describe what
3566 33. Some experimental protocols are using DNS PTR records for new purposes. The
3567 keys for these records are domain names, not reversed IP addresses. The
3568 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3569 leaves it alone. Component reversal etc. now happens only for IP addresses.
3572 34. The host_aton() function is supposed to be passed a string that is known
3573 to be a valid IP address. However, in the case of IPv6 addresses, it was
3574 not checking this. This is a hostage to fortune. Exim now panics and dies
3575 if the condition is not met. A case was found where this could be provoked
3576 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3577 components; fortuitously, this particular loophole had already been fixed
3578 by change 4.50/55 or 4.44/33 above.
3580 If there are any other similar loopholes, the new check in host_aton()
3581 itself should stop them being exploited. The report I received stated that
3582 data on the command line could provoke the exploit when Exim was running as
3583 exim, but did not say which command line option was involved. All I could
3584 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3585 running as the user.
3588 35. There was a buffer overflow vulnerability in the SPA authentication code
3589 (which came originally from the Samba project). I have added a test to the
3590 spa_base64_to_bits() function which I hope fixes it.
3593 36. The daemon start-up calls getloadavg() while still root for those OS that
3594 need the first call to be done as root, but it missed one case: when
3595 deliver_queue_load_max is set with deliver_drop_privilege. This is
3596 necessary for the benefit of the queue runner, because there is no re-exec
3597 when deliver_drop_privilege is set.
3599 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3600 was in use, was not putting the data itself into the right store pool;
3601 consequently, it could be overwritten for a subsequent message in the same
3602 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3605 38. Sometimes the final signoff response after QUIT could fail to get
3606 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3607 < 0 before doing a fflush(). This bug looks as though it goes back to the
3608 introduction of TLS in release 3.20, but "sometimes" must have been rare
3609 because the tests only now provoked it.
3615 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3616 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3617 Now it returns an integer. A number of calls were still expecting a T/F
3618 return. Fortuitously, in all cases, the tests worked in OK situations,
3619 which is the norm. However, things would have gone wrong on any write
3620 failures on the smtp file descriptor. This function is used when sending
3621 messages over SMTP and also when doing verify callouts.
3623 2. When Exim is called to do synchronous delivery of a locally submitted
3624 message (the -odf or -odi options), it no longer closes stderr before doing
3627 3. Implemented the mua_wrapper option.
3629 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3631 5. Implemented the functions header_remove(), header_testname(),
3632 header_add_at_position(), and receive_remove_recipient(), and exported them
3635 6. If an ACL "warn" statement specified the addition of headers, Exim already
3636 inserted X-ACL-Warn: at the start if there was no header name. However, it
3637 was not making this test for the second and subsequent header lines if
3638 there were newlines in the string. This meant that an invalid header could
3639 be inserted if Exim was badly configured.
3641 7. Allow an ACL "warn" statement to add header lines at the start or after all
3642 the Received: headers, as well as at the end.
3644 8. Added the rcpt_4xx retry error code.
3646 9. Added postmaster_mailfrom=xxx to callout verification option.
3648 10. Added mailfrom=xxxx to the callout verification option, for verify=
3651 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3652 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3654 12. Inserted some casts to stop certain compilers warning when using pointer
3655 differences as field lengths or precisions in printf-type calls (mostly
3656 affecting debugging statements).
3658 13. Added optional readline() support for -be (dynamically loaded).
3660 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3661 same clock tick as a message's arrival, so that its received time was the
3662 same as the "first fail" time on the retry record, and that message
3663 remained on the queue past the ultimate address timeout, every queue runner
3664 would try a delivery (because it was past the ultimate address timeout) but
3665 after another failure, the ultimate address timeout, which should have then
3666 bounced the address, did not kick in. This was a "< instead of <=" error;
3667 in most cases the first failure would have been in the next clock tick
3668 after the received time, and all would be well.
3670 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3671 being recognized when the domain list was tested by the match_domain
3672 condition in an expansion string.
3674 16. Added the ${str2b64: operator.
3676 17. Exim was always calling setrlimit() to set a large limit for the number of
3677 processes, without checking whether the existing limit was already
3678 adequate. (It did check for the limit on file descriptors.) Furthermore,
3679 errors from getrlimit() and setrlimit() were being ignored. Now they are
3680 logged to the main and panic logs, but Exim does carry on, to try to do its
3681 job under whatever limits there are.
3683 18. Imported PCRE 5.0.
3685 19. Trivial typo in log message " temporarily refused connection" (the leading
3688 20. If the log selector return_path_on_delivery was set and an address was
3689 redirected to /dev/null, the delivery process crashed because it assumed
3690 that a return path would always be set for a "successful" delivery. In this
3691 case, the whole delivery is bypassed as an optimization, and therefore no
3694 21. Internal re-arrangement: the function for sending a challenge and reading
3695 a response while authentication was assuming a zero-terminated challenge
3696 string. It's now changed to take a pointer and a length, to allow for
3697 binary data in such strings.
3699 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3701 23. Exim was not respecting finduser_retries when seeking the login of the
3702 uid under which it was called; it was always trying 10 times. (The default
3703 setting of finduser_retries is zero.) Also, it was sleeping after the final
3704 failure, which is pointless.
3706 24. Implemented tls_on_connect_ports.
3708 25. Implemented acl_smtp_predata.
3710 26. If the domain in control=submission is set empty, Exim assumes that the
3711 authenticated id is a complete email address when it generates From: or
3712 Sender: header lines.
3714 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3715 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3716 chown and chgrp in /bin and hostname in /usr/bin.
3718 28. Exim was keeping the "process log" file open after each use, just as it
3719 does for the main log. This opens the possibility of it remaining open for
3720 long periods when the USR1 signal hits a daemon. Occasional processlog
3721 errors were reported, that could have been caused by this. Anyway, it seems
3722 much more sensible not to leave this file open at all, so that is what now
3725 29. The long-running daemon process does not normally write to the log once it
3726 has entered its main loop, and it closes the log before doing so. This is
3727 so that log files can straightforwardly be renamed and moved. However,
3728 there are a couple of unusual error situations where the daemon does write
3729 log entries, and I had neglected to close the log afterwards.
3731 30. The text of an SMTP error response that was received during a remote
3732 delivery was being truncated at 512 bytes. This is too short for some of
3733 the long messages that one sometimes sees. I've increased the limit to
3736 31. It is now possible to make retry rules that apply only when a message has a
3737 specific sender, in particular, an empty sender.
3739 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3740 it possible to be selective about when SMTP synchronization is enforced.
3742 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3744 32. Implemented hosts_connection_nolog.
3746 33. Added an ACL for QUIT.
3748 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3751 35. Added mailbox_size and mailbox_filecount to appendfile.
3753 36. Added control = no_multiline_responses to ACLs.
3755 37. There was a bug in the logic of the code that waits for the clock to tick
3756 in the case where the clock went backwards by a substantial amount such
3757 that the microsecond fraction of "now" was more than the microsecond
3758 fraction of "then" (but the whole seconds number was less).
3760 38. Added support for the libradius Radius client library this is found on
3761 FreeBSD (previously only the radiusclient library was supported).
3767 1. When certain lookups returned multiple values in the form name=value, the
3768 quoting of the values was not always being done properly. Specifically:
3769 (a) If the value started with a double quote, but contained no whitespace,
3771 (b) If the value contained whitespace other than a space character (i.e.
3772 tabs or newlines or carriage returns) it was not quoted.
3773 This fix has been applied to the mysql and pgsql lookups by writing a
3774 separate quoting function and calling it from the lookup code. The fix
3775 should probably also be applied to nisplus, ibase and oracle lookups, but
3776 since I cannot test any of those, I have not disturbed their existing code.
3778 2. A hit in the callout cache for a specific address caused a log line with no
3779 reason for rejecting RCPT. Now it says "Previous (cached) callout
3780 verification failure".
3782 3. There was an off-by-one bug in the queryprogram router. An over-long
3783 return line was truncated at 256 instead of 255 characters, thereby
3784 overflowing its buffer with the terminating zero. As well as fixing this, I
3785 have increased the buffer size to 1024 (and made a note to document this).
3787 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3788 when Exim is waiting for an SMTP response from a remote server, Exim
3789 restarts its select() call on the socket, thereby resetting its timeout.
3790 This is not a problem when such interrupts are rare. Somebody set up a cron
3791 job to run exiwhat every 2 minutes, which is less than the normal select()
3792 timeout (5 or 10 minutes). This meant that the select() timeout never
3793 kicked in because it was always reset. I have fixed this by comparing the
3794 time when an interrupt arrives with the time at the start of the first call
3795 to select(). If more time than the timeout has elapsed, the interrupt is
3796 treated as a timeout.
3798 5. Some internal re-factoring in preparation for the addition of Sieve
3799 extensions (by MH). In particular, the "personal" test is moved to a
3800 separate function, and given an option for scanning Cc: and Bcc: (which is
3801 not set for Exim filters).
3803 6. When Exim created an email address using the login of the caller as the
3804 local part (e.g. when creating a From: or Sender: header line), it was not
3805 quoting the local part when it contained special characters such as @.
3807 7. Installed new OpenBSD configuration files.
3809 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3810 try to make them clearer.
3812 9. Callout options, other than the timeout value, were being ignored when
3813 verifying sender addresses in header lines. For example, when using
3815 verify = header_sender/callout=no_cache
3817 the cache was (incorrectly) being used.
3819 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3820 only the Cygwin environment.
3822 11. When return_path_on_delivery was set as a log selector, if different remote
3823 addresses in the same message used different return paths and parallel
3824 remote delivery occurred, the wrong values would sometimes be logged.
3825 (Whenever a remote delivery process finished, the return path value from
3826 the most recently started remote delivery process was logged.)
3828 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3829 lines when AUTH and/or TLS are in use. This is the "received protocol"
3830 field. Exim used to use "asmtp" for authenticated SMTP, without any
3831 indication (in the protocol name) for TLS use. Now it follows the RFC and
3832 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3833 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3834 names appear in log lines as well as in Received: header lines.
3836 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3837 extensions, and comparison tests, and to fix some bugs.
3839 14. Changes to the "personal" filter test:
3841 (1) The test was buggy in that it was just doing the equivalent of
3842 "contains" tests on header lines. For example, if a user's address was
3843 anne@some.where, the "personal" test would incorrectly be true for
3845 To: susanne@some.where
3847 This test is now done by extracting each address from the header in turn,
3848 and checking the entire address. Other tests that are part of "personal"
3849 are now done using regular expressions (for example, to check local parts
3850 of addresses in From: header lines).
3852 (2) The list of non-personal local parts in From: addresses has been
3853 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3854 taken from the Sieve specification recommendations.
3856 (3) If the message contains any header line starting with "List-" it is
3857 treated as non-personal.
3859 (4) The test for "circular" in the Subject: header line has been removed
3860 because it now seems ill-conceived.
3862 15. Minor typos in src/EDITME comments corrected.
3864 16. Installed latest exipick from John Jetmore.
3866 17. If headers_add on a router specified a text string that was too long for
3867 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3868 of string_sprintf() is now avoided.
3870 18. $message_body_size was not set (it was always zero) when running the DATA
3871 ACL and the local_scan() function.
3873 19. For the "mail" command in an Exim filter, no default was being set for
3874 the once_repeat time, causing a random time value to be used if "once" was
3875 specified. (If the value happened to be <= 0, no repeat happened.) The
3876 default is now 0s, meaning "never repeat". The "vacation" command was OK
3877 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3878 (I found it when inspecting the code).
3880 20. There is now an overall timeout for performing a callout verification. It
3881 defaults to 4 times the callout timeout, which applies to individual SMTP
3882 commands during the callout. The overall timeout applies when there is more
3883 than one host that can be tried. The timeout is checked before trying the
3884 next host. This prevents very long delays if there are a large number of
3885 hosts and all are timing out (e.g. when the network connections are timing
3886 out). The value of the overall timeout can be changed by specifying an
3887 additional sub-option for "callout", called "maxwait". For example:
3889 verify = sender/callout=5s,maxwait=20s
3891 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3892 to the end before writing, but this should make it even safer).
3894 22. Exim was forgetting that it had advertised PIPELINING for the second and
3895 subsequent messages on an SMTP connection. It was also not resetting its
3896 memory on STARTTLS and an internal HELO.
3898 23. When Exim logs an SMTP synchronization error within a session, it now
3899 records whether PIPELINING has been advertised or not.
3901 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3902 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3903 rather than long int.
3905 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3907 26. Added the never_mail option to autoreply.
3913 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3914 crash if the getsockname() call failed; this can happen if a connection is
3915 closed very soon after it is established. The problem was simply in the
3916 order in which certain operations were done, causing Exim to try to write
3917 to the SMTP stream before it had set up the file descriptor. The bug has
3918 been fixed by making things happen in the correct order.
3924 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3925 before the connection was closed, thus losing the rejection response.
3927 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3928 some early Solaris releases, but causes trouble in current releases where
3929 socklen_t is defined.
3931 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3934 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3937 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3938 that releasing the top of it at the end releases what was used for sub-
3939 expansions (unless the block got too big). However, discard this block if
3940 the first thing is a variable or header, so that we can use its block when
3941 it is dynamic (useful for very large $message_headers, for example).
3943 6. Lookups now cache *every* query, not just the most recent. A new, separate
3944 store pool is used for this. It can be recovered when all lookup caches are
3945 flushed. Lookups now release memory at the end of their result strings.
3946 This has involved some general refactoring of the lookup sources.
3948 7. Some code has been added to the store_xxx() functions to reduce the amount
3949 of flapping under certain conditions.
3951 8. log_incoming_interface used to affect only the <= reception log lines. Now
3952 it causes the local interface and port to be added to several more SMTP log
3953 lines, for example "SMTP connection from", and rejection lines.
3955 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3957 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3959 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3960 could be overwritten at the end of the current message (or the start of a
3961 new message if it was set in a HELO ACL). The value is now preserved for
3962 the duration of the SMTP connection.
3964 12. If a transport had a headers_rewrite setting, and a matching header line
3965 contained an unqualified address, that address was qualified, even if it
3966 did not match any rewriting rules. The underlying bug was that the values
3967 of the flags that permit the existence of unqualified sender and recipient
3968 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3969 non-local messages, and by -bnq for local messages) were not being
3970 preserved with the message after it was received.
3972 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3973 "next input=" as part of the text comprising the host identity instead of
3974 the correct text. The code was using the same buffer for two different
3975 strings. However, depending on which order the printing function evaluated
3976 its arguments, the bug did not always show up. Under Linux, for example, my
3977 test suite worked just fine.
3979 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3980 doesn't work with some older versions of Perl. It has been changed to "my",
3981 which in any case is probably the better facility to use.
3983 15. A really picky compiler found some instances of statements for creating
3984 error messages that either had too many or two few arguments for the format
3987 16. The size of the buffer for calls to the DNS resolver has been increased
3988 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3989 for addresses that have a lot of PTR records. This alleviates a problem; it
3990 does not fully solve it.
3992 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3993 buffer now truncates the list and logs the incident, which is the same
3994 action as happens when Exim is looking up a host name and its aliases.
3995 Previously in this situation something unpredictable would happen;
3996 sometimes it was "internal error: store_reset failed".
3998 18. If a server dropped the connection unexpectedly when an Exim client was
3999 using GnuTLS and trying to read a response, the client delivery process
4000 crashed while trying to generate an error log message.
4002 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4003 string, for example:
4005 warn message = H1: something\nH2: something
4007 the text was added as a single header line from Exim's point of view
4008 though it ended up OK in the delivered message. However, searching for the
4009 second and subsequent header lines using $h_h2: did not work. This has been
4010 fixed. Similarly, if a system filter added multiple headers in this way,
4011 the routers could not see them.
4013 20. Expanded the error message when iplsearch is called with an invalid key to
4014 suggest using net-iplsearch in a host list.
4016 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4017 ACLs are no longer actually imposed (and a message to that effect is
4020 22. If a "gecos" field in a passwd entry contained escaped characters, in
4021 particular, if it contained a \" sequence, Exim got it wrong when building
4022 a From: or a Sender: header from that name. A second bug also caused
4023 incorrect handling when an unquoted " was present following a character
4024 that needed quoting.
4026 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4027 was not being matched caselessly.
4029 24. Arranged for all hyphens in the exim.8 source to be escaped with
4032 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4033 properly. Recipient callout cache records were still being keyed to include
4034 the sender, even when use_sender was set false. This led to far more
4035 callouts that were necessary. The sender is no longer included in the key
4036 when use_sender is false.
4038 26. Added "control = submission" modifier to ACLs.
4040 27. Added the ${base62d: operator to decode base 62 numbers.
4042 28. dnsdb lookups can now access SRV records.
4044 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4045 the configuration file.
4047 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4048 (-v) mode. This makes the output for a verbose queue run more intelligible.
4050 31. Added a use_postmaster feature to recipient callouts.
4052 32. Added the $body_zerocount variable, containing the number of binary zero
4053 bytes in the message body.
4055 33. The time of last modification of the "new" subdirectory is now used as the
4056 "mailbox time last read" when there is a quota error for a maildir
4059 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4061 35. Added +ignore_unknown as a special item in host lists.
4063 36. Code for decoding IPv6 addresses in host lists is now included, even if
4064 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4065 address was recognized as an IP address, but was then not correctly decoded
4066 into binary, causing unexpected and incorrect effects when compared with
4073 1. Very minor rewording of debugging text in manualroute to say "list of
4074 hosts" instead of "hostlist".
4076 2. If verify=header_syntax was set, and a header line with an unqualified
4077 address (no domain) and a large number of spaces between the end of the
4078 name and the colon was received, the reception process suffered a buffer
4079 overflow, and (when I tested it) crashed. This was caused by some obsolete
4080 code that should have been removed. The fix is to remove it!
4082 3. When running in the test harness, delay a bit after writing a bounce
4083 message to get a bit more predictability in the log output.
4085 4. Added a call to search_tidyup() just before forking a reception process. In
4086 theory, someone could use a lookup in the expansion of smtp_accept_max_
4087 per_host which, without the tidyup, could leave open a database connection.
4089 5. Added the variables $recipient_data and $sender_data which get set from a
4090 lookup success in an ACL "recipients" or "senders" condition, or a router
4091 "senders" option, similar to $domain_data and $local_part_data.
4093 6. Moved the writing of debug_print from before to after the "senders" test
4096 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4097 problems for message scanning, either using a data ACL, or using
4098 local_scan() because the Received: header was not generated till after they
4099 were called (in order to set the time as the time of reception completion).
4100 I have revised the way this works. The header is now generated after the
4101 body is received, but before the ACL or local_scan() are called. After they
4102 are run, the timestamp in the header is updated.
4108 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4109 before starting a queue runner without re-exec. This happened only when
4110 deliver_drop_privilege was set or when the Exim user was set to root. The
4111 effect of the bug was that timeouts during subsequent deliveries caused
4112 crashes instead of being properly handled. The handler is now left at its
4113 default (and expected) setting.
4115 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4116 message, again when deliver_drop_privilege is set or Exim is run as root.
4117 The bug described in (1) was not present in this case, but the tidying up
4118 of the other signals was missing. I have made the two cases consistent.
4120 3. The ignore_target_hosts setting on a manualroute router was being ignored
4121 for hosts that were looked up using the /MX notation.
4123 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4126 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4127 operated on the sender address. After changing the $sender_address to <>
4128 for the sender address verify, Exim was re-instated it as the original
4129 (before rewriting) address, but remembering that it had rewritten it, so it
4130 wasn't rewriting it again. This bug also had the effect of breaking the
4131 sender address verification caching when the sender address was rewritten.
4133 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4134 This has been changed so that if the ip literal address matches
4135 ignore_target_hosts, the router declines.
4137 7. Added expansion conditions match_domain, match_address, and match_local_
4138 part (NOT match_host).
4140 8. The placeholder for the Received: header didn't have a length field set.
4142 9. Added code to Exim itself and to exim_lock to test for a specific race
4143 condition that could lead to file corruption when using MBX delivery. The
4144 issue is with the lockfile that is created in /tmp. If this file is removed
4145 after a process has opened it but before that process has acquired a lock,
4146 there is the potential for a second process to recreate the file and also
4147 acquire a lock. This could lead to two Exim processes writing to the file
4148 at the same time. The added code performs the same test as UW imapd; it
4149 checks after acquiring the lock that its file descriptor still refers to
4150 the same named file.
4152 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4153 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4156 11. Added the smtp_active_hostname option. If used, this will typically be made
4157 to depend on the incoming interface address. Because $interface_address is
4158 not set up until the daemon has forked a reception process, error responses
4159 that can happen earlier (such as "too many connections") no longer contain
4162 12. If an expansion in a condition on a "warn" statement fails because a lookup
4163 defers, the "warn" statement is abandoned, and the next ACL statement is
4164 processed. Previously this caused the whole ACL to be aborted.
4166 13. Added the iplsearch lookup type.
4168 14. Added ident_timeout as a log selector.
4170 15. Added tls_certificate_verified as a log selector.
4172 16. Added a global option tls_require_ciphers (compare the smtp transport
4173 option of the same name). This controls incoming TLS connections.
4175 17. I finally figured out how to make tls_require_ciphers do a similar thing
4176 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4177 before starting the TLS session.
4179 18. Tabs are now shown as \t in -bP output.
4181 19. If the log selector return_path_on_delivery was set, Exim crashed when
4182 bouncing a message because it had too many Received: header lines.
4184 20. If two routers both had headers_remove settings, and the first one included
4185 a superfluous trailing colon, the final name in the first list and the
4186 first name in the second list were incorrectly joined into one item (with a
4187 colon in the middle).
4193 1. Added -C and -D options to the exinext utility, mainly to make it easier
4194 to include in the automated testing, but these could be helpful when
4195 multiple configurations are in use.
4197 2. The exinext utility was not formatting the output nicely when there was
4198 an alternate port involved in the retry record key, nor when there was a
4199 message id as well (for retries that were specific to a specific message
4200 and a specific host). It was also confused by IPv6 addresses, because of
4201 the additional colons they contain. I have fixed the IPv4 problem, and
4202 patched it up to do a reasonable job for IPv6.
4204 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4205 delivery, the log line now contains "pipelined" if PIPELINING was used.
4207 4. An SMTP transport process used to panic and die if the bind() call to set
4208 an explicit outgoing interface failed. This has been changed; it is now
4209 treated in the same way as a connect() failure.
4211 5. A reference to $sender_host_name in the part of a conditional expansion
4212 that was being skipped was still causing a DNS lookup. This no longer
4215 6. The def: expansion condition was not recognizing references to header lines
4216 that used bh_ and bheader_.
4218 7. Added the _cache feature to named lists.
4220 8. The code for checking quota_filecount in the appendfile transport was
4221 allowing one more file than it should have been.
4223 9. For compatibility with Sendmail, the command line option
4231 and sets the incoming protocol and host name (for trusted callers). The
4232 host name and its colon can be omitted when only the protocol is to be set.
4233 Note the Exim already has two private options, -pd and -ps, that refer to
4234 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4235 "s", but I don't think that's a major issue.
4237 10. A number of refactoring changes to the code, none of which should affect
4240 (a) The number of logging options was getting close to filling up the
4241 32-bit word that was used as a bit map. I have split them into two classes:
4242 those that are passed in the argument to log_write(), and those that are
4243 only ever tested independently outside of that function. These are now in
4244 separate 32-bit words, so there is plenty of room for expansion again.
4245 There is no change in the user interface or the logging behaviour.
4247 (b) When building, for example, log lines, the code previously used a
4248 macro that called string_cat() twice, in order to add two strings. This is
4249 not really sufficiently general. Furthermore, there was one instance where
4250 it was actually wrong because one of the argument was used twice, and in
4251 one call a function was used. (As it happened, calling the function twice
4252 did not affect the overall behaviour.) The macro has been replaced by a
4253 function that can join an arbitrary number of extra strings onto a growing
4256 (c) The code for expansion conditions now uses a table and a binary chop
4257 instead of a serial search (which was left over from when there were very
4258 few conditions). Also, it now recognizes conditions like "pam" even when
4259 the relevant support is not compiled in: a suitably worded error message is
4260 given if an attempt is made to use such a condition.
4262 11. Added ${time_interval:xxxxx}.
4264 12. A bug was causing one of the ddress fields not to be passed back correctly
4265 from remote delivery subprocesses. The field in question was not being
4266 subsequently used, so this caused to problems in practice.
4268 13. Added new log selectors queue_time and deliver_time.
4270 14. Might have fixed a bug in maildirsizefile handling that threw up
4271 "unexpected character" debug warnings, and recalculated the data
4272 unnecessarily. In any case, I expanded the warning message to give more
4275 15. Added the message "Restricted characters in address" to the statements in
4276 the default ACL that block characters like @ and % in local parts.
4278 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4279 Three changes have been made:
4281 (a) There was a serious bug; a negative response to MAIL caused the whole
4282 recipient domain to be cached as invalid, thereby blocking all messages
4283 to all local parts at the same domain, from all senders. This bug has
4284 been fixed. The domain is no longer cached after a negative response to
4285 MAIL if the sender used is not empty.
4287 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4290 (c) A new callout option, "use_sender" has been added for people who want
4291 the modified behaviour.
4297 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4300 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4301 indeed breaks things for older releases.
4303 3. Added additional logging to the case where there is a problem reading data
4304 from a filter that is running in a subprocess using a pipe, in order to
4305 try to track down a specific problem.
4307 4. Testing facility fudge: when running in the test harness and attempting
4308 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4309 getting "No route to host". Convert this to a timeout.
4311 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4314 6. Some OS don't have socklen_t but use size_t instead. This affects the
4315 fifth argument of getsockopt() amongst other things. This is now
4316 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4317 can be set for individual OS. I have set it for SunOS5, OSF1, and
4318 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4319 some earlier ones do not.
4321 7. Change 4.30/15 was not doing the test caselessly.
4323 8. The standard form for an IPv6 address literal was being rejected by address
4324 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4325 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4326 this, as well as the form without the "IPv6" on the front (but only when
4327 address literals are enabled, of course).
4329 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4331 10. Exim crashed if a message with an empty sender address specified by -f
4332 encountered a router with an errors_to setting. This could be provoked only
4333 by a command such as
4337 where an empty string was supplied; "<>" did not hit this bug.
4339 11. Installed PCRE release 4.5.
4341 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4342 remained set. It is now erased.
4344 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4345 times from message ids (which are base 36 rather than the normal 62).
4347 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4348 were being counted as actual protocol errors, and logged if the log
4349 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4350 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4351 and DATA following a set of rejected RCPTs do not count as protocol errors.
4352 In other words, Exim assumes they were pipelined, though this may not
4353 actually be the case. Of course, in all cases the client gets an
4354 appropriate error code.
4356 15. If a lookup fails in an ACL condition, a message about the failure may
4357 be available; it is used if testing the ACL cannot continue, because most
4358 such messages specify what the cause of the deferral is. However, some
4359 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4360 that caused an old message to be retained and used if a later statement
4361 caused a defer, replacing the real cause of the deferral.
4363 16. If an IP address had so many PTR records that the DNS lookup buffer
4364 was not large enough to hold them, Exim could crash while trying to process
4365 the truncated data. It now detects and logs this case.
4367 17. Further to 4.21/58, another change has been made: if (and only if) the
4368 first line of a message (the first header line) ends with CRLF, a bare LF
4369 in a subsequent header line has a space inserted after it, so as not to
4370 terminate the header.
4372 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4373 unnecessarily, used atoi() instead of strtol(), and didn't check the
4374 termination when getting file sizes from file names by regex.
4376 19. Completely re-implemented the support for maildirsize files, in the light
4377 of a number of problems with the previous contributed implementation
4378 (4.30/29). In particular:
4380 . If the quota is zero, the maildirsize file is maintained, but no quota is
4383 . If the maildir directory does not exist, it is created before any attempt
4384 to write a maildirsize file.
4386 . The quota value in the file is just a cache; if the quota is changed in
4387 the transport, the new value overrides.
4389 . A regular expression is available for excluding directories from the
4392 20. The autoreply transport checks the characters in options that define the
4393 message's headers; it allows continued headers, but it was checking with
4394 isspace() after an embedded newline instead of explicitly looking for a
4397 21. If all the "regular" hosts to which an address was routed had passed their
4398 expiry times, and had not reached their retry times, the address was
4399 bounced, even if fallback hosts were defined. Now Exim should go on to try
4402 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4403 equivalent code in the SMTP transport. Some hosts send humungous responses
4404 to HELO/EHLO, more than 1024 it seems.
4406 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4407 gives compiler warnings in some environments. I've now done it "properly",
4410 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4411 (because of problems with the built-in one) was declared to return uschar *
4412 instead of char *, causing compiler failure.
4414 25. Fixed a file descriptor leak when processing alias/forward files.
4416 26. Fixed a minor format string issue in dbfn.c.
4418 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4420 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4421 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4424 29. When a sender address is verified, it is cached, to save repeating the test
4425 when there is more than one recipient in a message. However, when the
4426 verification involves a callout, it is possible for different callout
4427 options to be set for different recipients. It is too complicated to keep
4428 track of this in the cache, so now Exim always runs a verification when a
4429 callout is required, relying on the callout cache for the optimization.
4430 The overhead is duplication of the address routing, but this should not be
4433 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4434 to be verified with callout=postmaster, and the main callout worked but the
4435 postmaster check failed, the verification correctly failed. However, if a
4436 subsequent RCPT command asked for sender verification *without* the
4437 postmaster check, incorrect caching caused this verification also to fail,
4440 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4441 it was not caching the DNS options (qualify_single, search_parents) that
4442 were used when the lookup failed. A subsequent lookup with different
4443 options therefore always gave the same answer, though there were cases
4444 where it should not have. (Example: a "domains = !$mx_any" option on a
4445 dnslookup router: the "domains" option is always processed without any
4446 widening, but the router might have qualify_single set.) Now Exim uses the
4447 cached value only when the same options are set.
4449 32. Added John Jetmore's "exipick" utility to the distribution.
4451 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4452 than a timeout (e.g. a certificate is required, and is not provided), an
4453 Exim server now closes the connection immediately. Previously it waited for
4454 the client to close - but if the client is SSL, it seems that they each
4455 wait for each other, leading to a delay before one of them times out.
4457 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4458 maintained 0.8.x compatibility because I don't think many are using it, and
4459 it is clearly obsolete.
4461 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4464 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4465 client certificate was expired. A simple patch fixes this, though I don't
4466 understand the full logic of why the verify callback is called multiple
4469 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4470 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4471 which causes problems with some clients (such as the Certicom SSL Plus
4472 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4473 disables the coutermeasure allowing Eudora to connect."
4475 38. Exim was not checking that a write() to a log file succeeded. This could
4476 lead to Bad Things if a log got too big, in particular if it hit a file
4477 size limit. Exim now panics and dies if it cannot write to a log file, just
4478 as it does if it cannot open a log file.
4480 39. Modified OS/Makefile-Linux so that it now contains
4482 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4484 The two -D definitions ensure that Exim is compiled with large file
4485 support, which makes it possible to handle log files that are bigger than
4488 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4489 instance) a domain was checked against a named list that involved a lookup,
4490 causing $domain_data to be set, then another domain was checked against the
4491 same list, then the first domain was re-checked, the value of $domain_data
4492 after the final check could be wrong. In particular, if the second check
4493 failed, it could be set empty. This bug probably also applied to
4496 41. The strip_trailing_dot option was not being applied to the address given
4497 with the -f command-line option.
4499 42. The code for reading a message's header from the spool was incrementing
4500 $received_count, but never initializing it. This meant that the value was
4501 incorrect (doubled) while delivering a message in the same process in which
4502 it was received. In the most common configuration of Exim, this never
4503 happens - a fresh exec is done - but it can happen when
4504 deliver_drop_privilege is set.
4506 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4507 it now includes up to 150 characters of the unexpected data in the log
4510 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4511 and building data strings. The size of both of these buffers was 10 000
4512 bytes - far larger than anybody would *ever* want, thought I. Needless to
4513 say, somebody hit the limit. I have increased the maximum line length to
4514 20 000 and the maximum data length of concatenated lines to 100 000. I have
4515 also fixed two bugs, because there was no checking on these buffers. Tsk,
4516 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4517 buffer is too small.
4519 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4520 lsearch lookups. Now it does.
4522 46. When parsing a route_list item in a manualroute router, a fixed-length
4523 buffer was used for the list of hosts. I made this 1024 bytes long,
4524 thinking that nobody would ever have a list of hosts that long. Wrong.
4525 Somebody had a whole pile of complicated expansion conditions, and the
4526 string was silently truncated, leading to an expansion error. It turns out
4527 that it is easier to change to an unlimited length (owing to other changes
4528 that have happened since this code was originally written) than to build
4529 structure for giving a limitation error. The length of the item that
4530 expands into the list of hosts is now unlimited.
4532 47. The lsearch lookup could not handle data where the length of text line was
4533 more than 4095 characters. Such lines were truncated, leading to shortened
4534 data being returned. It should now handle lines of any length.
4536 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4537 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4540 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4541 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4542 no longer happens in comment lines. A list of replacements is now placed
4543 at the head of all of the source files, except those whose only change is
4544 to replace PERL_COMMAND in the very first #! line.
4546 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4547 messages on the queue, with a bottom-up merge sort, using code contributed
4548 by Michael Haardt. This should make operations like -bp somewhat faster on
4549 large queues. It won't affect queue runners, except when queue_run_in_order
4552 51. Installed eximstats 1.31 in the distribution.
4554 52. Added support for SRV lookups to the dnslookup router.
4556 53. If an ACL referred to $message_body or $message_body_end, the value was not
4557 reset for any messages that followed in the same SMTP session.
4559 54. The store-handling optimization for building very long strings was not
4560 differentiating between the different store pools. I don't think this
4561 actually made any difference in practice, but I've tidied it.
4563 55. While running the routers to verify a sender address, $sender_address
4564 was still set to the sender address. This is wrong, because when routing to
4565 send a bounce to the sender, it would be empty. Therefore, I have changed
4566 it so that, while verifying a sender address, $sender_address is set to <>.
4567 (There is no change to what happens when verifying a recipient address.)
4569 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4570 target A or AAAA records (if not already returned) without resetting the
4571 qualify_single or search_parents options of the DNS resolver. These are
4572 inappropriate in this case because the targets of MX and SRV records must
4573 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4574 target that, when qualified, matched something in the local domain. These
4575 two options are now turned off when doing these lookups.
4577 57. It seems that at least some releases of Reiserfs (which does not have the
4578 concept of a fixed number of inodes) returns zero and not -1 for the
4579 number of available inodes. This interacted badly with check_spool_inodes,
4580 which assumed that -1 was the "no such thing" setting. What I have done is
4581 to check that the total number of inodes is greater than zero before doing
4582 the test of how many are available.
4584 58. When a "warn" ACL statement has a log_message modifier, the message is
4585 remembered, and not repeated. This is to avoid a lot of repetition when a
4586 message has many recipients that cause the same warning to be written.
4587 Howewer, Exim was preserving the list of already written lines for an
4588 entire SMTP session, which doesn't seem right. The memory is now reset if a
4589 new message is started.
4591 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4592 debugging output unless log_rewrite was also set.
4594 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4595 of (int)(handle) when we know that handle contains (void *)(-1).
4597 61. The Exim daemon panic-logs an error return when it closes the incoming
4598 connection. However "connection reset by peer" seems to be common, and
4599 isn't really an error worthy of noting specially, so that particular error
4602 62. When Exim is trying to find all the local interfaces, it used to panic and
4603 die if the ioctl to get the interface flags failed. However, it seems that
4604 on at least one OS (Solaris 9) it is possible to have an interface that is
4605 included in the list of interfaces, but for which you get a failure error
4606 for this call. This happens when the interface is not "plumbed" into a
4607 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4608 failure of the "get flags" call assumes that the interface is down.
4610 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4611 makes life easier for people who are doing arithmetic on fields extracted
4612 from dates, where you often get leading zeros that should not be
4613 interpreted as octal.
4615 64. Added qualify_domain to the redirect router, to override the global
4618 65. If a pathologically long header line contained very many addresses (the
4619 report of this problem mentioned 10 000) and each of them was rewritten,
4620 Exim could use up a very large amount of memory. (It kept on making new
4621 copies of the header line as it rewrote, and never released the old ones.)
4622 At the expense of a bit more processing, the header rewriting function has
4623 been changed so that it no longer eats memory in this way.
4625 66. The generation of the Received: header has been moved from the time that a
4626 message starts to be received, to the time that it finishes. The timestamp
4627 in the Received: header should now be very close to that of the <= log
4628 line. There are two side-effects of this change:
4630 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4631 logged header lines no longer include the local Received: line, because
4632 it has not yet been created. The same applies to a copy of the message
4633 that is returned to a non-SMTP sender when a message is rejected.
4635 (b) When a filter file is tested using -bf, no additional Received: header
4636 is added to the test message. After some thought, I decided that this
4639 This change does not affect the value of $received_for. It is still set
4640 after address rewriting, but before local_scan() is called.
4642 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4644 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4645 gave an unhelpful panic error message, and a defer error. I have managed to
4646 change this behaviour so that it now rejects any supplied certificate,
4647 which seems right, as the list of acceptable certificates is empty.
4649 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4650 gave an unhelpful defer error. I have not managed to make this reject any
4651 supplied certificates, but the error message it gives is "no certificate
4652 supplied", which is not helpful.
4654 70. exigrep's output now also includes lines that are not associated with any
4655 message, but which match the given pattern. Implemented by a patch from
4656 Martin Sluka, which also tidied up the Perl a bit.
4658 71. Recipient callout verification, like sender verification, was using <> in
4659 the MAIL FROM command. This isn't really the right thing, since the actual
4660 sender may affect whether the remote host accepts the recipient or not. I
4661 have changed it to use the actual sender in the callout; this means that
4662 the cache record is now keyed on a recipient/sender pair, not just the
4663 recipient address. There doesn't seem to be a real danger of callout loops,
4664 since a callout by the remote host to check the sender would use <>.
4665 [SEE ABOVE: changed after hitting problems.]
4667 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4668 temporary errors. However, in the case of such a code being given after
4669 the end of a data transmission (i.e. after ".") Exim was failing to write
4670 a retry record for the message. (Yes, there was some broken host that was
4671 actually sending 8xx at this point.)
4673 73. An unknown lookup type in a host list could cause Exim to panic-die when
4674 the list was checked. (An example that provoked this was putting <; in the
4675 middle of a list instead of at the start.) If this happened during a DATA
4676 ACL check, a -D file could be left lying around. This kind of configuration
4677 error no longer causes Exim to die; instead it causes a defer errror. The
4678 incident is still logged to the main and panic logs.
4680 74. Buglet left over from Exim 3 conversion. The message "too many messages
4681 in one connection" was written to the rejectlog but not the mainlog, except
4682 when address rewriting (yes!) was being logged.
4684 75. Added write_rejectlog option.
4686 76. When a system filter was run not as root (that is, when system_filter_user
4687 was set), the values of the $n variables were not being returned to the
4688 main process; thus, they were not subsequently available in the $sn
4691 77. Added +return_path_on_delivery log selector.
4693 78. A connection timeout was being treated differently from recipients deferred
4694 when testing hosts_max_try with a message that was older than the host's
4695 retry timeout. (The host should not be counted, thus allowing all hosts to
4696 be tried at least once before bouncing.) This may have been the cause of an
4697 occasionally reported bug whereby a message would remain on the queue
4698 longer than the retry timeout, but would be bounced if a delivery was
4699 forced. I say "may" because I never totally pinned down the problem;
4700 setting up timeout/retry tests is difficult. See also the next item.
4702 79. The ultimate address timeout was not being applied to errors that involved
4703 a combination of host plus message (for example, a timeout on a MAIL
4704 command). When an address resolved to a number of possible hosts, and they
4705 were not all tried for each delivery (e.g. because of hosts_max_try), a
4706 message could remain on the queue longer than the retry timeout.
4708 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4711 81. Fixed an obscure SMTP outgoing bug which required at least the following
4712 conditions: (a) there was another message waiting for the same server;
4713 (b) the server returned 5xx to all RCPT commands in the first message so
4714 that the message was not completed; (c) the server dropped the connection
4715 or gave a negative response to the RSET that Exim sends to abort the
4716 transaction. The observed case was a dropped connection after DATA that had
4717 been sent in pipelining mode. That is, the server had advertised PIPELINING
4718 but was not implementing it correctly. The effect of the bug was incorrect
4719 behaviour, such as trying another host, and this could lead to a crash.
4725 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4726 and daemon.c were passed as pointers to ints; they should have been
4727 pointers to socklen_t variables (which are typically unsigned ints).
4729 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4732 3. Fixed a really odd bug that affected only the testing scheme; patching a
4733 certain fixed string in the binary changed the value of another string that
4734 happened to be identical to the end of the original first string.
4736 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4737 name", it returns that address as the IP address. On some operating
4738 systems (e.g. Solaris), it also passes back the IP address string as the
4739 "host name". However, on others (e.g. Linux), it passes back an empty
4740 string. Exim wasn't checking for this, and was changing the host name to an
4741 empty string, assuming it had been canonicized.
4743 5. Although rare, it is permitted to have more than one PTR record for a given
4744 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4745 all the names associated with an address, because they do in Solaris.
4746 However, it seems that they do not in Linux for data that comes from the
4747 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4748 I found this out when I moved to a new Linux workstation and tried to run
4749 the Exim test suite.
4751 To get round this problem I have changed the code so that it now does its
4752 own call to the DNS to look up PTR records when searching for a host name.
4753 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4754 addresses that are only in /etc/hosts are still found.
4756 This behaviour is, however, controlled by an option called host_lookup_
4757 order, which defaults to "bydns:byaddr". If people want to use the other
4758 order, or indeed, just use one or the other means of lookup, they can
4759 specify it in this variable.
4761 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4762 some operating systems, this comes back from gethostbyaddr() as an empty
4763 string, and this is what Exim used to test for. However, it seems that in
4764 other systems, "." is yielded. Exim now tests for this case too.
4766 7. The values of check_spool_space and check_log_space are now held internally
4767 as a number of kilobytes instead of an absolute number of bytes. If a
4768 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4769 kilobyte. This means that much larger values can be stored.
4771 8. Exim monitor: an attempt to get the action menu when not actually pointing
4772 at a message produces an empty menu entitled "No message selected". This
4773 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4774 no entries in it ("Shell widget menu has zero width and/or height"). So I
4775 have added a single, blank menu entry in this case.
4777 9. Added ${quote_local_part.
4779 10. MIME decoding is now applied to the contents of Subject: header lines when
4782 11. Now that a reference to $sender_host_address automatically causes a reverse
4783 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4784 host lookup before query-style lookups in lists that might use this
4785 variable. This has therefore been abolished, and the "net-" prefix is no
4786 longer necessary for query-style lookups.
4788 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4789 have been a typo for LFLAGS, so it has been changed.
4791 13. The install script calls Exim with "-C /dev/null" in order to find the
4792 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4793 to be output. Howeve, since Exim outputs its version number before the
4794 error, it didn't break the script. It just looked ugly. I fixed this by
4795 always allowing "-C /dev/null" if the caller is root.
4797 14. Ignore overlarge ACL variable number when reading spool file - insurance
4798 against a later release with more variables having written the file.
4800 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4801 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4802 this, as well as the form without the "IPv6" on the front.
4804 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4805 OS/Makefile-Darwin file.
4807 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4808 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4810 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4811 variable. However, some OS use ints for inodes. I've added cast to long int
4812 to get rid of the compiler warning.
4814 19. I had forgotten to lock out "/../" in configuration file names when
4815 ALT_CONFIG_PREFIX was set.
4817 20. Routers used for verification do not need to specify transports. However,
4818 if such a router generated a host list, and callout was configured, Exim
4819 crashed, because it could not find a port number from the (non-existent)
4820 transport. It now assumes port 25 in this circumstance.
4822 21. Added the -t option to exigrep.
4824 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4825 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4826 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4827 them is set, LOOKUP_LSEARCH is forced.
4829 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4831 24. Added sender and host information to the "rejected by local_scan()" log
4832 line; previously there was no indication of these.
4834 25. Added .include_if_exists.
4836 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4837 Linux. It turns out that not all file systems support this. Apparently some
4838 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4839 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4840 not supported on the file descriptor, is now ignored when Exim is trying to
4841 sync a directory. This applies only to Linux.
4843 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4845 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4846 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4849 29. Added support for maildirsize files from supplied patch (modified a bit).
4851 30. The use of :fail: followed by an empty string could lead Exim to respond to
4852 sender verification failures with (e.g.):
4854 550 Verification failed for <xxx>
4855 550 Sender verify failed
4857 where the first response line was missing the '-' that indicates it is not
4858 the final line of the response.
4860 31. The loop for finding the name of the user that called Exim had a hardwired
4861 limit of 10; it now uses the value of finduser_retries, which is used for
4862 all other user lookups.
4864 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4867 33. Exim was neglecting to zero errno before one call of strtol() when
4868 expanding a string and expecting an integer value. On some systems this
4869 resulted in spurious "integer overflow" errors. Also, it was casting the
4870 result into an int without checking.
4872 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4873 did not work. The code looks as if it has *never* worked, though it appears
4874 to have been documented since at least releast 1.62. I have made it work.
4876 35. The "timeout_DNS" error in retry rules, also documented since at least
4877 1.62, also never worked. As it isn't clear exactly what this means, and
4878 clearly it isn't a major issue, I have abolished the feature by treating it
4879 as "timeout", and writing a warning to the main and panic logs.
4881 36. The display of retry rules for -brt wasn't always showing the error code
4884 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4885 timeout_connect_A, timeout_connect_MX.
4887 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4888 to the empty sender.
4890 39. The daemon was not analysing the content of -oX till after it had closed
4891 stderr and disconnected from the controlling terminal. This meant that any
4892 syntax errors were only noted on the panic log, and the return code from
4893 the command was 0. By re-arranging the code a little, I've made the
4894 decoding happen first, so such errors now appear on stderr, and the return
4895 code is 1. However, the actual setting up of the sockets still happens in
4896 the disconnected process, so errors there are still only recorded on the
4899 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4900 connections (as happens on some IP stacks) was logged at start up time as
4901 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4902 it from "IPv6 and IPv4", which means that two separate sockets are being
4905 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4906 says whether AF_INET or AF_INET6 was passed as an argument.
4908 42. Exiwhat output was messed up when time zones were included in log
4911 43. Exiwhat now gives more information about the daemon's listening ports,
4912 and whether -tls-on-connect was used.
4914 44. The "port" option of the smtp transport is now expanded.
4916 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4917 silently ignored. Now an error message is written to the main and panic
4920 46. There's a new ACL modifier called "logwrite" which writes to a log file
4921 as soon as it is encountered.
4923 47. Added $local_user_uid and $local_user_gid at routing time.
4925 48. Exim crashed when trying to verify a sender address that was being
4928 49. Exim was recognizing only a space character after ".include". It now also
4929 recognizes a tab character.
4931 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4932 extracting the relevant information from the specification. The man page no
4933 longer contains scrambled data for the -d option, and I've added a section
4934 at the front about calling Exim under different names.
4936 51. Added "extra_headers" argument to the "mail" command in filter files.
4938 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4941 53. Installed eximstats 1.29.
4943 54. Added transport_filter_timeout as a generic transport option.
4945 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4946 Cc: header lines. This was required by RFC 822, but it not required by RFC
4949 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4950 incoming messages that did not have them. Now it does so only if the
4951 message originates locally, that is, if there is no associated remote host
4952 address. When Resent- header lines are present, this applies to the Resent-
4953 lines rather than the non-Resent- lines.
4955 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4956 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4958 58. Messages for configuration errors now include the name of the main
4959 configuration file - useful now that there may be more than one file in a
4960 list (.included file names were always shown).
4962 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4963 for those rare installations that do not start the daemon as root or run it
4964 setuid root. I've cut out the call to initgroups() if the daemon is not
4967 60. The Exim user and group can now be bound into the binary as text strings
4968 that are looked up at the start of Exim's processing.
4970 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4972 62. Added $mailstore_basename variable.
4974 63. Installed patch to sieve.c from Michael Haardt.
4976 64. When Exim failed to open the panic log after failing to open the main log,
4977 the original message it was trying to log was written to stderr and debug
4978 output, but if they were not available (the usual case in production), it
4979 was lost. Now it is written to syslog before the two lines that record the
4980 failures to open the logs.
4982 65. Users' Exim filters run in subprocesses under the user's uid. It is
4983 possible for a "deliver" command or an alias in a "personal" command to
4984 provoke an address rewrite. If logging of address rewriting is configured,
4985 this fails because the process is not running as root or exim. There may be
4986 a better way of dealing with this, but for the moment (because 4.30 needs
4987 to be released), I have disabled address rewrite logging when running a
4988 filter in a non-root, non-exim process.
4994 1. The buildconfig auxiliary program wasn't quoting the value set for
4995 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4996 not defined. This bug was masked in 4.22 by the effect that was fixed in
4999 2. Some messages that were rejected after a message id was allocated were
5000 shown as "incomplete" by exigrep. It no longer does this for messages that
5001 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5003 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5004 have allow_domain_literals set, the ID did not get logged in the <= line.
5005 Domain literals are now always recognized in Message-ID: header lines.
5007 4. The first argument for a ${extract expansion item is the key name or field
5008 number. Leading and trailing spaces in this item were not being ignored,
5009 causing some misleading effects.
5011 5. When deliver_drop_privilege was set, single queue runner processes started
5012 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5013 same command in the process it spins off) were not dropping privilege.
5015 6. When the daemon running as "exim" started a queue runner, it always
5016 re-executed Exim in the spun-off process. This is a waste of effort when
5017 deliver_drop_privilege is set. The new process now just calls the
5018 queue-runner function directly.
5024 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5027 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5028 ignored. Though the use of -oP was forcing the writing of a pid file, it
5029 was always written to the default place.
5031 3. If the message "no IP address found for host xxxx" is generated during
5032 incoming verification, it is now followed by identification of the incoming
5033 connection (so you can more easily find what provoked it).
5035 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5037 5. Added some features to "harden" Exim a bit more against certain attacks:
5039 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5040 be put in Local/Makefile. This is like the never_users runtime option,
5041 but it cannot be overridden. The default setting is "root".
5043 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5044 prefix string with which any file named in a -C command line option
5047 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5048 is retained for -C and -D only if the caller of Exim is root. Without
5049 it, the exim user may also use -C and -D and retain privilege.
5051 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5052 command line option is disabled.
5054 6. Macro names set by the -D option must start with an upper case letter, just
5055 like macro names defined in the configuration file.
5057 7. Added "dereference=" facility to LDAP.
5059 8. Two instances of the typo "uknown" in the source files are fixed.
5061 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5062 the Configure-Makefile script screwed up while processing it.
5064 10. Incorporated PCRE 4.4.
5066 11. The SMTP synchronization check was not operating right at the start of an
5067 SMTP session. For example, it could not catch a HELO sent before the client
5068 waited for the greeting. There is now a check for outstanding input at the
5069 point when the greeting is written. Because of the duplex, asynchronous
5070 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5071 way, but not yet received, when the check is performed.
5073 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5074 on TCP/IP sockets, because this apparently causes some broken clients to
5077 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5078 unchanged) from the Cygwin maintainer.
5080 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5081 was supported instead of testing for mbx. Effectively a typo.
5083 15. The spa authenticator server code was not checking that the input it
5084 received was valid base64.
5086 16. The debug output line for the "set" modifier in ACLs was not showing the
5087 name of the variable that was being set.
5089 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5091 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5092 lookup on its own. Something else was needed to trigger the lookup. For
5093 example, a match in host_lookup or the need for a host name in a host list.
5094 Now, if $sender_host_name is referenced and the host name has not yet been
5095 looked up, a lookup is performed. If the lookup fails, the variable remains
5096 empty, and $host_lookup_failed is set to "1".
5098 19. Added "eqi" as a case-independent comparison operator.
5100 20. The saslauthd authentication condition could segfault if neither service
5101 nor realm was specified.
5103 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5104 error message that was logged was misleading, and incoming SMTP
5105 connections were dropped. The message is now more accurate, and temporary
5106 errors are given to SMTP connections.
5108 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5109 (except RSET) with a 421 error, until QUIT is received. However, it was
5110 failing to send a response to QUIT.
5112 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5113 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5114 ACL is now run after the helo_try_verify_hosts code.
5116 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5117 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5118 case-independent, so other case variants are also recognized). Apparently
5119 some systems use these upper case variants.
5121 25. If more than two messages were waiting for the same host, and a transport
5122 filter was specified for the transport, Exim sent two messages over the
5123 same TCP/IP connection, and then failed with "socket operation on non-
5124 socket" when it tried to send the third.
5126 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5128 27. The extern definition of crypt16() in expand.c was not being excluded when
5129 the OS had its own crypt16() function.
5131 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5132 as a preferred synonym for return_size_limit, both as an option and as an
5135 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5137 30. Changed the default configuration ACL to relax the local part checking rule
5138 for addresses that are not in any local domains. For these addresses,
5139 slashes and pipe symbols are allowed within local parts, but the sequence
5140 /../ is explicitly forbidden.
5142 31. SPA server authentication was not clearing the challenge buffer before
5145 32. log_message in a "warn" ACL statement was writing to the reject log as
5146 well as to the main log, which contradicts the documentation and doesn't
5147 seem right (because no rejection is happening). So I have stopped it.
5149 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5150 However, I am unable to do any testing of this.
5152 34. Fixed an infelicity in the appendfile transport. When checking directories
5153 for a mailbox, to see if any needed to be created, it was accidentally
5154 using path names with one or more superfluous leading slashes; tracing
5155 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5157 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5158 contents are added to the log line that is written for every discarded
5159 recipient. (Previously a log_message setting was ignored.)
5161 36. The ${quote: operator now quotes the string if it is empty.
5163 37. The install script runs exim in order to find its version number. If for
5164 some reason other than non-existence or emptiness, which it checks, it
5165 could not run './exim', it was installing it with an empty version number,
5166 i.e. as "exim-". This error state is now caught, and the installation is
5169 38. An argument was missing from the function that creates an error message
5170 when Exim fails to connect to the socket for saslauthd authentication.
5171 This could cause Exim to crash, or give a corrupted message.
5173 39. Added isip, isip4, and isip6 to ${if conditions.
5175 40. The ACL variables $acl_xx are now saved with the message, and can be
5176 accessed later in routers, transports, and filters.
5178 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5179 strings in the file are not string-expanded.
5181 42. If a MAIL command specified a SIZE value that was too large to fit into an
5182 int variable, the check against message_size_limit failed. Such values are
5183 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5184 day this will have to be increased, but I don't think I want to be around
5185 when emails are that large.
5192 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5193 iconv() is not standard in FreeBSD.
5195 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5196 IPv6 enabled. The observed symptom was a segmentation fault on return from
5197 the function os_common_find_running_interfaces() in src/os.c.
5199 3. In the check_special_case() function in daemon.c I had used "errno" as an
5200 argument name, which causes warnings on some systems. This was basically a
5201 typo, since it was named "eno" in the comments!
5203 4. The code that waits for the clock to tick (at a resolution of some fraction
5204 of a second) so as to ensure message-id uniqueness was always waiting for
5205 at least one whole tick, when it could have waited for less. [This is
5206 almost certainly not relevant at current processor speeds, where it is
5207 unlikely to ever wait at all. But we try to future-proof.]
5209 5. The function that sleeps for a time interval that includes fractions of a
5210 second contained a race. It did not block SIGALRM between setting the
5211 timer, and suspending (a couple of lines later). If the interval was short
5212 and the sigsuspend() was delayed until after it had expired, the suspension
5213 never ended. On busy systems this could lead to processes getting stuck for
5216 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5217 process, before it forks any delivery processes. The open lookup caching
5218 mechanism meant that the open file or database connection was passed into
5219 the delivery process. The problem was that delivery processes always tidy
5220 up cached lookup data. This could cause a problem for the next delivery
5221 process started by the queue runner, because the external queue runner
5222 process does not know about the closure. So the next delivery process
5223 still has data in the lookup cache. In the case of a file lookup, there was
5224 no problem because closing a file descriptor in a subprocess doesn't affect
5225 the parent. However, if the lookup was caching a connection to a database,
5226 the connection was closed, and the second delivery process was likely to
5227 see errors such as "PGSQL: query failed: server closed the connection
5228 unexpectedly". The problem has been fixed by closing all cached lookups
5229 in a queue runner before running a delivery process.
5231 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5232 seem to have the "const" qualifier which it has on other OS. I've
5235 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5236 *of the same type* (client or server) with the same public name that an
5237 error should be diagnosed.
5239 9. When Exim looked up a host name for an IP address, but failed to find the
5240 original IP address when looking up the host name (a safety check), it
5241 output the message "<ip address> does not match any IP for NULL", which was
5242 confusing, to say the least. The bug was that the host name should have
5243 appeared instead of "NULL".
5245 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5246 user that is built into the binary, and the -C or -D options is used, root
5247 privilege is dropped before the configuration file is read. In addition,
5248 logging is switched to stderr instead of the normal log files. If the
5249 configuration then re-defines the Exim user, the unprivileged environment
5250 is probably not what is expected, so Exim logs a panic warning message (but
5253 However, if deliver_drop_privilege is set, the unprivileged state may well
5254 be exactly what is intended, so the warning has been cut out in that case,
5255 and Exim is allowed to try to write to its normal log files.
5261 1. smtp_return_error_details was not giving details for temporary sender
5262 or receiver verification errors.
5264 2. Diagnose a configuration error if two authenticators have the same public
5267 3. Exim used not to create the message log file for a message until the first
5268 delivery attempt. This could be confusing when incoming messages were held
5269 for policy or load reasons. The message log file is now created at the time
5270 the message is received, and an initial "Received" line is written to it.
5272 4. The automatically generated man page for command line options had a minor
5273 bug that caused no ill effects; however, a more serious problem was that
5274 the procedure for building the man page automatically didn't always
5275 operate. Consequently, release 4.20 contains an out-of-date version. This
5276 shouldn't happen again.
5278 5. When building Exim with embedded Perl support, the script that builds the
5279 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5280 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5282 6. The freeze_tell option was not being used for messages that were frozen on
5283 arrival, either by an ACL or by local_scan().
5285 7. Added the smtp_incomplete_transaction log selector.
5287 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5288 was accepting AUTH without a new EHLO.
5290 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5291 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5294 10. Logging of TCP/IP connections (when configured) now happens in the main
5295 daemon process instead of the child process, so that the TCP/IP connection
5296 count is more accurate (but it can never be perfect).
5298 11. The use of "drop" in a nested ACL was not being handled correctly in the
5299 outer ACL. Now, if condition failure induced by the nested "drop" causes
5300 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5301 or "require"), the connection is dropped.
5303 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5304 that yield "discard" can now be used with an "accept" or a "discard" verb,
5305 but an error is generated for any others (because I can't see a useful way
5306 to define what should happen).
5308 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5309 are now processed in the same way as lines in the Exim configuration file.
5310 In particular, continuation lines are supported.
5312 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5314 15. Added -ti meaning -t -i.
5316 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5317 domains, and warn by logging if others are found.
5319 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5320 returned from GIFCONF when Exim is trying to find the list of interfaces on
5321 a host. The code in os.c has been modified to copy each ifreq to an aligned
5322 structure in all cases.
5324 Also, in some cases, the returned ifreq's were being copied to a 'struct
5325 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5326 means the last couple of bytes of an IPv6 address could be chopped if the
5327 ifreq contained only a normal sockaddr (14 bytes storage).
5329 18. Named domain lists were not supported in the hosts_treat_as_local option.
5330 An entry such as +xxxx was not recognized, and was treated as a literal
5333 19. Ensure that header lines added by a DATA ACL are included in the reject log
5334 if the ACL subsequently rejects the message.
5336 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5337 MD5 (which is deprecated).
5339 21. When testing a filter file using -bf, Exim was writing a message when it
5340 took the sender from a "From " line in the message, but it was not doing so
5341 when it took $return_path from a Return-Path: header line. It now does.
5343 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5344 with a valid header line field name (a series of printing characters
5345 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5347 23. Changed "disc" in the source to "disk" to conform to the documentation and
5348 the book and for uniformity.
5350 24. Ignore Sendmail's -Ooption=value command line item.
5352 25. When execve() failed while trying to run a command in a pipe transport,
5353 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5354 could be confused with a return value of 69 from the command itself. This
5355 has been changed to 127, the value the shell returns if it is asked to run
5356 a non-existent command. The wording for the related log line suggests a
5357 non-existent command as the problem.
5359 26. If received_header_text expands to an empty string, do not add a Received:
5360 header line to the message. (Well, it adds a token one on the spool, but
5361 marks it "old" so that it doesn't get used or transmitted.)
5363 27. Installed eximstats 1.28 (addition of -nt option).
5365 28. There was no check for failure on the call to getsockname() in the daemon
5366 code. This can fail if there is a shortage of resources on the system, with
5367 ENOMEM, for example. A temporary error is now given on failure.
5369 29. Contrary to the C standard, it seems that in some environments, the
5370 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5371 program. Exim now does this explicitly; it affects the formatting of
5372 timestamps using strftime().
5374 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5375 complaints. I've now initialized all the variables, to avoid this.
5377 32. Header lines added by a system filter were not being "seen" during
5378 transport-time rewrites.
5380 33. The info_callback() function passed to OpenSSL is set up with type void
5381 (*)(SSL *, int, int), as described somewhere. However, when calling the
5382 function (actually a macro) that sets it up, the type void(*)() is
5383 expected. I've put in a cast to prevent warnings from picky compilers.
5385 34. If a DNS black list lookup found a CNAME record, but there were no A
5386 records associated with the domain it pointed at, Exim crashed.
5388 35. If a DNS black list lookup returned more than one A record, Exim ignored
5389 all but the first. It now scans all returned addresses if a particular IP
5390 value is being sought. In this situation, the contents of the
5391 $dnslist_value variable are a list of all the addresses, separated by a
5394 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5395 to accept a host name and all its aliases if the forward lookup for any of
5396 them yielded the IP address of the incoming connection. Now it accepts only
5397 those names whose forward lookup yields the correct IP address. Any other
5398 names are discarded. This closes a loophole whereby a rogue DNS
5399 administrator could create reverse DNS records to break through a
5400 wildcarded host restriction in an ACL.
5402 37. If a user filter or a system filter that ran in a subprocess used any of
5403 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5404 the wrong values were passed to the pipe command ($thisaddress had the
5405 value of $0, $0 had the value of $1, etc). This bug was introduced by
5406 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5408 38. Improved the line breaking for long SMTP error messages from ACLs.
5409 Previously, if there was no break point between 40 and 75 characters, Exim
5410 left the rest of the message alone. Two changes have been made: (a) I've
5411 reduced the minimum length to 35 characters; (b) if it can't find a break
5412 point between 35 and 75 characters, it looks ahead and uses the first one
5413 that it finds. This may give the occasional overlong line, but at least the
5414 remaining text gets split now.
5416 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5417 file descriptors might be low, and that setting 1000 would always raise it.
5418 It turns out that in some environments, the limit is already over 1000 and
5419 that lowering it causes trouble. So now Exim takes care not to decrease it.
5421 40. When delivering a message, the value of $return_path is set to $sender_
5422 address at the start of routing (routers may change the value). By an
5423 oversight, this default was not being set up when an address was tested by
5424 -bt or -bv, which affected the outcome if any router or filter referred to
5427 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5428 log only when "message" or "log_message" are set. However, if one of the
5429 conditions was an address verification, or a call to a nested ACL, the
5430 messages generated by the underlying test were being passed through. This
5431 no longer happens. The underlying message is available in $acl_verify_
5432 message for both "message" and "log_message" expansions, so it can be
5433 passed through if needed.
5435 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5436 new expansion $bh_ to give the encoded byte string without charset
5437 translation. Translation happens only if iconv() is available; HAVE_ICONV
5438 indicates this at build time. HEADERS_CHARSET gives the charset to
5439 translate to; headers_charset can change it in the configuration, and
5440 "headers charset" can change it in an individual filter file.
5442 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5443 that creates RFC 2047 encoded "words" labels them as that charset instead
5444 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5445 expansion operator; (ii) when Exim creates a From: line for a local
5446 message; (iii) when a header line is rewritten to include a "phrase" part.
5448 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5449 buggy, causing it to skip the first lines of messages whose message ID
5450 ended in 'D'. This would not have bitten before Exim release 4.14, because
5451 message IDs were unlikely to end in 'D' before then. The effect was to have
5452 incorrect size information for certain domains.
5454 45. #include "config.h" was missing at the start of the crypt16.c module. This
5455 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5458 46. If there was a timeout during a "random" callout check, Exim treated it as
5459 a failure of the random address, and carried on sending RSET and the real
5460 address. If the delay was just some slowness somewhere, the response to the
5461 original RCPT would be taken as a response to RSET and so on, causing
5462 mayhem of various kinds.
5464 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5465 when I implemented it. It didn't allow for the fact that some option values
5466 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5467 the right test for positive values.
5469 48. Domain names in DNS records are case-independent. Exim always looks them up
5470 in lower case. Some resolvers return domain names in exactly the case they
5471 appear in the zone file, that is, they may contain uppercase letters. Not
5472 all resolvers do this - some return always lower case. Exim was treating a
5473 change of case by a resolver as a change of domain, similar to a widening
5474 of a domain abbreviation. This triggered its re-routing code and so it was
5475 trying to route what was effectively the same domain again. This normally
5476 caused routing to fail (because the router wouldn't handle the domain
5477 twice). Now Exim checks for this case specially, and just changes the
5478 casing of the domain that it ultimately uses when it transmits the message
5481 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5484 50. If a filter generated a file delivery with a non-absolute name (possible if
5485 no home directory exists for the router), the forbid_file option was not
5488 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5489 the existing equality matching.
5491 52. Exim was using ints instead of ino_t variables in some places where it was
5492 dealing with inode numbers.
5494 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5495 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5496 called TMPDIR, and if it finds it is different, it changes its value.
5498 54. The smtp_printf() function is now made available to local_scan() so
5499 additional output lines can be written before returning. There is also an
5500 smtp_fflush() function to enable the detection of a dropped connection.
5501 The variables smtp_input and smtp_batched_input are exported to
5504 55. Changed the default runtime configuration: the message "Unknown user"
5505 has been removed from the ACL, and instead placed on the localuser router,
5506 using the cannot_route_message feature. This means that any verification
5507 failures that generate their own messages won't get overridden. Similarly,
5508 the "Unrouteable address" message that was in the ACL for unverifiable
5509 relay addresses has also been removed.
5511 56. Added hosts_avoid_esmtp to the smtp transport.
5513 57. The exicyclog script was not checking for the esoteric option
5514 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5515 will work only if exicyclog is run under the appropriate euid.
5517 58. Following a discussion on the list, the rules by which Exim recognises line
5518 endings on incoming messages have been changed. The -dropcr and drop_cr
5519 options are now no-ops, retained only for backwards compatibility. The
5520 following line terminators are recognized: LF CRLF CR. However, special
5521 processing applies to CR:
5523 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5524 nor a local message in the state where . is a terminator.
5526 (ii) If a bare CR is encountered in a header line, an extra space is added
5527 after the line terminator so as not to end the header. The reasoning
5528 behind this is that bare CRs in header lines are most likely either
5529 to be mistakes, or people trying to play silly games.
5531 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5532 was being incorrectly given as 18 bytes larger than it should have been.
5533 This is a VOB (very old bug).
5535 60. This may never have affected anything current, but just in case it has:
5536 When the local host is found other than at the start of a list of hosts,
5537 the local host, those with the same MX, and any that follow, are discarded.
5538 When the list in question was part of a longer list of hosts, the following
5539 hosts (not currently being processed) were also being discarded. This no
5540 longer happens. I'm not sure if this situation could ever has previously
5543 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5546 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5547 header. This is something that is recommended in a new Internet Draft, and
5548 is something that is documented as being done by Sendmail. There are two
5549 possible values. For messages generated by the autoreply transport, Exim
5552 Auto-Submitted: auto-replied
5554 whereas for all other generated messages (e.g. bounces) it adds
5556 Auto-Submitted: auto-generated
5558 63. The "personal" condition in filters now includes a test for the
5559 Auto-Submitted: header. If it contains the string "auto-" the message it
5560 not considered personal.
5562 64. Added rcpt_include_affixes as a generic transport option.
5564 65. Added queue_only_override (default true).
5566 66. Added the syslog_duplication option.
5568 67. If what should have been the first header line of a message consisted of
5569 a space followed by a colon, Exim was mis-interpreting it as a header line.
5570 It isn't of course - it is syntactically invalid and should therefore be
5571 treated as the start of the message body. The misbehaviour could have
5572 caused a number of strange effects, including loss of data in subsequent
5573 header lines, and spool format errors.
5575 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5576 client host had authenticated. This control can now be exercised by an ACL
5577 for more flexibility.
5579 69. By default, callouts do not happen when testing with -bh. There is now a
5580 variant, -bhc, which does actually run the callout code, including
5581 consulting and updating the callout cache.
5583 70. Added support for saslauthd authentication, courtesy of Alexander
5586 71. If statvfs() failed on the spool or log directories while checking their
5587 size for availability, Exim confusingly gave the error "space shortage".
5588 Furthermore, in debugging mode it crashed with a floating point exception.
5589 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5590 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5591 serious problem, Exim now writes to the main and panic logs when this
5592 happens, with details of the failure. It then refuses to accept the
5593 incoming message, giving the message "spool directory problem" or "log
5594 directory problem" with a 421 code for SMTP messages.
5596 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5597 0, 1, and 2 exist, because some OS complain for execs without them (see
5598 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5599 descriptors. However, the code omitted to check that the open succeeded,
5600 causing mysterious errors if for some reason the permissions on /dev/null
5601 got screwed. Now Exim writes a message to the main and panic logs, and
5602 bombs out if it can't open /dev/null.
5604 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5605 interact so that it is all more flexible. It is supposed to remain
5606 backwards compatible. Also added extra_local_interfaces.
5608 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5609 to bomb out with an assertion failure - to the client this appears as a
5610 connection drop. This problem occurs in the part of the code that was taken
5611 from the Samba project. Fortunately, the assertion is in a very simple
5612 function, so I have fixed this by reproducing the function inline in the
5613 one place where it is called, and arranging for authentication to fail
5614 instead of killing the process with assert().
5616 75. The SPA client code was not working when the server requested OEM rather
5617 than Unicode encoding.
5619 76. Added code to make require_files with a specific uid setting more usable in
5620 the case where statting the file as root fails - usually a non-root-mounted
5621 NFS file system. When this happens and the failure is EACCES, Exim now
5622 forks a subprocess and does the per-uid checking as the relevant uid.
5624 77. Added process_log_path.
5626 78. If log_file_path was not explicitly set, a setting of check_log_space or
5627 check_log_inodes was ignored.
5629 79. If a space check for the spool or log partitions fails, the incident is now
5630 logged. Of course, in the latter case the data may get lost...
5632 80. Added the %p formatting code to string_format() so that it can be used to
5633 print addresses in debug_print(). Adjusted all the address printing in the
5634 debugging in store.c to use %p rather than %d.
5636 81. There was a concern that a line of code in smtp_in.c could overflow a
5637 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5638 initially expressed, the concern was not well-founded, because trailing
5639 spaces are removed early. However, if the trailing spaces were followed by
5640 a NULL, they did not get removed, so the overflow was possible. Two fixes
5643 (a) I re-wrote the offending code in a cleaner fashion.
5644 (b) If an incoming SMTP command contains a NULL character, it is rejected
5647 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5648 runs initgroups(), so that if the Exim user is in any additional groups,
5649 they will be used during message reception.
5655 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob