1 Change log file for Exim from version 4.21
2 -------------------------------------------
7 PP/01 Handle short writes when writing local log-files.
8 In practice, only affects FreeBSD (8 onwards).
9 Bugzilla 1053, with thanks to Dmitry Isaikin.
11 NM/01 Bugzilla 949 - Documentation tweak
13 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
16 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
18 PP/02 Implemented gsasl authenticator.
20 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
22 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
23 `pkg-config foo` for cflags/libs.
25 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
26 with rest of GSASL and with heimdal_gssapi.
28 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
29 `pkg-config foo` for cflags/libs for the TLS implementation.
31 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
32 properties get this fed in as external SSF. A number of robustness
33 and debugging improvements to the cyrus_sasl authenticator.
35 PP/08 cyrus_sasl server now expands the server_realm option.
37 PP/09 Bugzilla 1214 - Log authentication information in reject log.
38 Patch by Jeremy Harris.
40 PP/10 Added dbmjz lookup type.
42 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
44 PP/12 MAIL args handles TAB as well as SP, for better interop with
45 non-compliant senders.
46 Analysis and variant patch by Todd Lyons.
48 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
49 Bug report from Lars Müller <lars@samba.org> (via SUSE),
50 Patch from Dirk Mueller <dmueller@suse.com>
52 PP/13 tls_peerdn now print-escaped for spool files.
53 Observed some $tls_peerdn in wild which contained \n, which resulted
54 in spool file corruption.
56 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
57 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
58 or write after TLS renegotiation, which otherwise led to messages
61 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
62 as a tracking header (ie: a signed header comes before the signature).
63 Patch from Wolfgang Breyha.
65 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
66 comma-sep list; embedded commas doubled.
68 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
70 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
72 Report and patch from Dmitry Banschikov.
74 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
75 Removed SSL_clear() after SSL_new() which led to protocol negotiation
76 failures. We appear to now support TLS1.1+ with Exim.
78 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
79 lets Exim select keys and certificates based upon TLS SNI from client.
80 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
81 before an outbound SMTP session. New log_selector, +tls_sni.
83 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
84 NULL dereference. Report and patch from Alun Jones.
86 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
87 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
88 Not seeing resolver debug output on NetBSD, but suspect this is a
89 resolver implementation change.
91 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
92 Left warnings. Added "eximon gdb" invocation mode.
94 PP/21 Defaulting "accept_8bitmime" to true, not false.
96 PP/22 Added -bw for inetd wait mode support.
98 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
99 locate the relevant includes and libraries. Made this the default.
101 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
102 Bugzilla 1246, report and most of solution from Tomasz Kusy.
104 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
105 This may cause build issues on older platforms.
107 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
108 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
109 gnutls_require_mac & gnutls_require_protocols (no longer supported).
110 Added SNI support via GnuTLS too.
111 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
113 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
115 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
116 Applied second patch from Janne, implementing suggestion to default
117 multiple-strings-in-record handling to match SPF spec.
119 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
121 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
122 read-only, out of scope).
123 Patch from Wolfgang Breyha, report from Stuart Northfield.
125 PP/29 Fix three issues highlighted by clang analyser static analysis.
126 Only crash-plausible issue would require the Cambridge-specific
127 iplookup router and a misconfiguration.
128 Report from Marcin Mirosław.
130 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
132 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
133 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
134 As part of this, removing so much warning spew let me fix some minor
135 real issues in debug logging.
137 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
138 assignment on my part. Fixed.
140 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
141 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
142 Janne Snabb (who went above and beyond: thank you).
144 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
145 string otherwise requires a connection and a bunch more work and it's
146 relatively easy to get wrong. Should also expose TLS library linkage
153 PP/01 Solaris build fix for Oracle's LDAP libraries.
154 Bugzilla 1109, patch from Stephen Usher.
156 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
158 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
161 TF/02 Fix a couple more cases where we did not log the error message
162 when unlink() failed. See also change 4.74-TF/03.
164 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
165 lock up or crash if it happened to be inside a call to libc when it
166 got a SIGUSR1 from exiwhat.
168 The SIGUSR1 handler appends the current process status to the process
169 log which is later printed by exiwhat. It used to use the general
170 purpose logging code to do this, but several functions it calls are
171 not safe for signals.
173 The new output code in the SIGUSR1 handler is specific to the process
174 log, and simple enough that it's easy to inspect for signal safety.
175 Removing some special cases also simplifies the general logging code.
176 Removing the spurious timestamps from the process log simplifies
179 TF/04 Improved ratelimit ACL condition.
181 The /noupdate option has been deprecated in favour of /readonly which
182 has clearer semantics. The /leaky, /strict, and /readonly update modes
183 are mutually exclusive. The update mode is no longer included in the
184 database key; it just determines when the database is updated. (This
185 means that when you upgrde Exim will forget old rate measurements.)
187 Exim now checks that the per_* options are used with an update mode that
188 makes sense for the current ACL. For example, when Exim is processing a
189 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
190 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
191 must specify per_mail/readonly. If you omit the update mode it defaults to
192 /leaky where that makes sense (as before) or /readonly where required.
194 The /noupdate option is now undocumented but still supported for
195 backwards compatibility. It is equivalent to /readonly except that in
196 ACLs where /readonly is required you may specify /leaky/noupdate or
197 /strict/noupdate which are treated the same as /readonly.
199 A useful new feature is the /count= option. This is a generalization
200 of the per_byte option, so that you can measure the throughput of other
201 aggregate values. For example, the per_byte option is now equivalent
202 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
204 The per_rcpt option has been generalized using the /count= mechanism
205 (though it's more complicated than the per_byte equivalence). When it is
206 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
207 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
208 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
209 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
210 Note that using per_rcpt with a non-readonly update mode in more than
211 one ACL will cause the recipients to be double-counted. (The per_mail
212 and per_byte options don't have this problem.)
214 The handling of very low rates has changed slightly. If the computed rate
215 is less than the event's count (usually one) then this event is the first
216 after a long gap. In this case the rate is set to the same as this event's
217 count, so that the first message of a spam run is counted properly.
219 The major new feature is a mechanism for counting the rate of unique
220 events. The new per_addr option counts the number of different
221 recipients that someone has sent messages to in the last time period. It
222 behaves like per_rcpt if all the recipient addresses are different, but
223 duplicate recipient addresses do not increase the measured rate. Like
224 the /count= option this is a general mechanism, so the per_addr option
225 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
226 example, measure the rate that a client uses different sender addresses
227 with the options per_mail/unique=$sender_address. There are further
228 details in the main documentation.
230 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
232 TF/06 Removed a few PCRE remnants.
234 TF/07 Automatically extract Exim's version number from tags in the git
235 repository when doing development or release builds.
237 PP/02 Raise smtp_cmd_buffer_size to 16kB.
238 Bugzilla 879. Patch from Paul Fisher.
240 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
241 Heavily based on revision 40f9a89a from Simon Arlott's tree.
244 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
246 PP/05 Variable $av_failed, true if the AV scanner deferred.
247 Bugzilla 1078. Patch from John Horne.
249 PP/06 Stop make process more reliably on build failure.
250 Bugzilla 1087. Patch from Heiko Schlittermann.
252 PP/07 Make maildir_use_size_file an _expandable_ boolean.
253 Bugzilla 1089. Patch from Heiko Schlittermann.
255 PP/08 Handle ${run} returning more data than OS pipe buffer size.
256 Bugzilla 1131. Patch from Holger Weiß.
258 PP/09 Handle IPv6 addresses with SPF.
259 Bugzilla 860. Patch from Wolfgang Breyha.
261 PP/10 GnuTLS: support TLS 1.2 & 1.1.
263 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
266 PP/11 match_* no longer expand right-hand-side by default.
267 New compile-time build option, EXPAND_LISTMATCH_RHS.
268 New expansion conditions, "inlist", "inlisti".
270 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
272 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
274 PP/14 fix log_write() format string regression from TF/03.
275 Bugzilla 1152. Patch from Dmitry Isaikin.
281 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
283 PP/02 Harmonised TLS library version reporting; only show if debugging.
284 Layout now matches that introduced for other libraries in 4.74 PP/03.
286 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
288 PP/04 New "dns_use_edns0" global option.
290 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
293 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
294 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
296 TK/01 Updated PolarSSL code to 0.14.2.
297 Bugzilla 1097. Patch from Andreas Metzler.
299 PP/07 Catch divide-by-zero in ${eval:...}.
302 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
305 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
306 format-string attack -- SECURITY: remote arbitrary code execution.
308 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
309 time unintentionally subject to list matching rules, letting the header
310 cause arbitrary Exim lookups (of items which can occur in lists, *not*
311 arbitrary string expansion). This allowed for information disclosure.
313 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
314 INT_MIN/-1 -- value coerced to INT_MAX.
320 NM/01 Workround for PCRE version dependency in version reporting
323 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
324 This fixes portability to compilers other than gcc, notably
325 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
327 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
328 makefiles for portability to HP-UX and POSIX correctness.
330 PP/01 Permit LOOKUP_foo enabling on the make command-line.
331 Also via indented variable definition in the Makefile.
332 (Debugging by Oliver Heesakkers).
334 PP/02 Restore caching of spamd results with expanded spamd_address.
335 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
337 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
338 Improves build reliability. Fix from: Frank Elsner
340 NM/02 Fix wide character breakage in the rfc2047 coding
341 Fixes bug 1064. Patch from Andrey N. Oktyabrski
343 NM/03 Allow underscore in dnslist lookups
344 Fixes bug 1026. Patch from Graeme Fowler
346 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
347 Code patches from Adam Ciarcinski of NetBSD.
349 NM/04 Fixed exiqgrep to cope with mailq missing size issue
352 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
353 is logged, to avoid truncation. Patch from John Horne.
355 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
356 Patch from Jakob Hirsch.
358 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
359 SQL string expansion failure details.
360 Patch from Andrey Oktyabrski.
362 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
363 Patch from Simon Arlott.
365 PP/09 New lookups functionality failed to compile on old gcc which rejects
366 extern declarations in function scope.
367 Patch from Oliver Fleischmann
369 PP/10 Use sig_atomic_t for flags set from signal handlers.
370 Check getgroups() return and improve debugging.
371 Fixed developed for diagnosis in bug 927 (which turned out to be
374 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
375 Patch from Mark Zealey.
377 PP/12 Bugzilla 1056: Improved spamd server selection.
378 Patch from Mark Zealey.
380 PP/13 Bugzilla 1086: Deal with maildir quota file races.
381 Based on patch from Heiko Schlittermann.
383 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
384 Patch from Uwe Doering, sign-off by Michael Haardt.
386 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
387 variable declaration deep within a block. Bug and patch from
390 PP/15 lookups-Makefile IRIX compatibilty coercion.
392 PP/16 Make DISABLE_DKIM build knob functional.
394 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
395 Patch by Simon Arlott
397 TF/03 Fix valgrind.h portability to C89 compilers that do not support
398 variable argument macros. Our copy now differs from upstream.
404 TF/01 Failure to get a lock on a hints database can have serious
405 consequences so log it to the panic log.
407 TF/02 Log LMTP confirmation messages in the same way as SMTP,
408 controlled using the smtp_confirmation log selector.
410 TF/03 Include the error message when we fail to unlink a spool file.
412 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
413 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
414 for maintaining out-of-tree patches for some time.
416 PP/01 Bugzilla 139: Documentation and portability issues.
417 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
418 Handle per-OS dynamic-module compilation flags.
420 PP/02 Let /dev/null have normal permissions.
421 The 4.73 fixes were a little too stringent and complained about the
422 permissions on /dev/null. Exempt it from some checks.
423 Reported by Andreas M. Kirchwitz.
425 PP/03 Report version information for many libraries, including
426 Exim version information for dynamically loaded libraries. Created
427 version.h, now support a version extension string for distributors
428 who patch heavily. Dynamic module ABI change.
430 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
431 privilege escalation vulnerability whereby the Exim run-time user
432 can cause root to append content of the attacker's choosing to
435 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
438 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
439 If dropping privileges for untrusted macros, we disabled normal logging
440 on the basis that it would fail; for the Exim run-time user, this is not
441 the case, and it resulted in successful deliveries going unlogged.
442 Fixed. Reported by Andreas Metzler.
448 PP/01 Date: & Message-Id: revert to normally being appended to a message,
449 only prepend for the Resent-* case. Fixes regression introduced in
450 Exim 4.70 by NM/22 for Bugzilla 607.
452 PP/02 Include check_rfc2047_length in configure.default because we're seeing
453 increasing numbers of administrators be bitten by this.
455 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
457 PP/03 Bugzilla 994: added openssl_options main configuration option.
459 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
461 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
463 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
465 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
466 without a peer certificate, leading to a segfault because of an
467 assumption that peers always have certificates. Be a little more
468 paranoid. Problem reported by Martin Tscholak.
470 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
471 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
472 NB: ClamAV planning to remove STREAM in "middle of 2010".
473 CL also introduces -bmalware, various -d+acl logging additions and
474 more caution in buffer sizes.
476 PP/09 Implemented reverse_ip expansion operator.
478 PP/10 Bugzilla 937: provide a "debug" ACL control.
480 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
482 PP/12 Bugzilla 973: Implement --version.
484 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
486 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
488 PP/15 Bugzilla 816: support multiple condition rules on Routers.
490 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
491 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
492 ignore trailing whitespace.
494 JJ/02 prevent non-panic DKIM error from being sent to paniclog
496 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
499 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
500 Notification from Dr Andrew Aitchison.
502 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
503 ExtendedDetectionInfo response format.
504 Notification from John Horne.
506 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
509 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
510 XSL and documented dependency on system catalogs, with examples of how
513 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
516 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
517 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
518 configuration file which is writeable by the Exim user or group.
520 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
521 of configuration files to cover files specified with the -C option if
522 they are going to be used with root privileges, not just the default
525 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
526 option (effectively making it always true).
528 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
529 files to be used while preserving root privileges.
531 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
532 that rogue child processes cannot use them.
534 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
535 run-time user, instead of root.
537 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
538 Exim run-time user without dropping privileges.
540 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
541 result string, instead of calling string_vformat() twice with the same
544 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
545 for other users. Others should always drop root privileges if they use
546 -C on the command line, even for a whitelisted configure file.
548 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
550 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
556 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
557 $data_path, and $header_path variables; fixed documentation bugs and
560 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
561 exipick to access non-standard spools, including the "frozen" queue
564 NM/01 Bugzilla 965: Support mysql stored procedures.
565 Patch from Alain Williams
567 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
569 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
570 Patch from Andreas Metzler
572 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
573 Patch from Kirill Miazine
575 NM/05 Bugzilla 671: Added umask to procmail example.
577 JJ/03 installed exipick 20100323.0, fixing doc bug
579 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
580 directory. Notification and patch from Dan Rosenberg.
582 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
584 TK/02 Improve log output when DKIM signing operation fails.
586 MH/01 Treat the transport option dkim_domain as a colon separated
587 list, not as a single string, and sign the message with each element,
588 omitting multiple occurences of the same signer.
590 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
591 Bugzilla 985, 986. Patch by Simon Arlott
593 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
594 Patch by Simon Arlott
596 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
597 MBX locking. Notification from Dan Rosenberg.
603 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
605 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
607 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
609 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
611 NM/04 Bugzilla 915: Flag broken perl installation during build.
617 TK/01 Added patch by Johannes Berg that expands the main option
618 "spamd_address" if it starts with a dollar sign.
620 TK/02 Write list of recipients to X-Envelope-Sender header when building
621 the mbox-format spool file for content scanning (suggested by Jakob
624 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
625 (http://www.dcc-servers.net/) support via dccifd. Activated by
626 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
628 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
629 by Mark Daniel Reidel <mr@df.eu>.
631 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
632 When building exim an external PCRE library is now needed -
633 PCRE is a system library on the majority of modern systems.
634 See entry on PCRE_LIBS in EDITME file.
636 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
637 conversation. Added nologin parameter to request.
638 Patch contributed by Kirill Miazine.
640 TF/01 Do not log submission mode rewrites if they do not change the address.
642 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
644 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
645 log files in place. Contributed by Roberto Lima.
647 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
649 TF/03 Bugzilla 615: When checking the local_parts router precondition
650 after a local_part_suffix or local_part_prefix option, Exim now
651 does not use the address's named list lookup cache, since this
652 contains cached lookups for the whole local part.
654 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
655 Robert Millan. Documentation is in experimental-spec.txt.
657 TF/04 Bugzilla 668: Fix parallel build (make -j).
659 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
661 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
662 Patch provided by Jan Srzednicki.
664 TF/05 Leading white space used to be stripped from $spam_report which
665 wrecked the formatting. Now it is preserved.
667 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
668 that they are available at delivery time.
670 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
672 TF/08 TLS error reporting now respects the incoming_interface and
673 incoming_port log selectors.
675 TF/09 Produce a more useful error message if an SMTP transport's hosts
676 setting expands to an empty string.
678 NM/06 Bugzilla 744: EXPN did not work under TLS.
679 Patch provided by Phil Pennock.
681 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
682 Patch provided by Richard Godbee.
684 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
685 acl_smtp_notquit, added index entry.
687 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
688 Patch provided by Eugene Bujak.
690 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
691 accept(). Patch provided by Maxim Dounin.
693 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
694 Patch provided by Phil Pennock.
696 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
698 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
699 Patch provided by Brad "anomie" Jorsch.
701 NM/14 Bugzilla 622: Added timeout setting to transport filter.
702 Patch provided by Dean Brooks.
704 TK/05 Add native DKIM support (does not depend on external libraries).
706 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
707 Patch provided by Graeme Fowler.
709 NM/16 Bugzilla 851: Documentation example syntax fix.
711 NM/17 Changed NOTICE file to remove references to embedded PCRE.
713 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
716 NM/19 Bugzilla 745: TLS version reporting.
717 Patch provided by Phil Pennock.
719 NM/20 Bugzilla 167: bool: condition support.
720 Patch provided by Phil Pennock.
722 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
723 clients. Patch provided by Phil Pennock.
725 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
726 Patch provided by Brad "anomie" Jorsch.
728 NM/23 Bugzilla 687: Fix misparses in eximstats.
729 Patch provided by Heiko Schlittermann.
731 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
732 Patch provided by Heiko Schlittermann.
734 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
735 plus update to original patch.
737 NM/26 Bugzilla 799: Documentation correction for ratelimit.
739 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
740 Patch provided by David Brownlee.
742 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
744 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
746 NM/30 Bugzilla 888: TLS documentation bugfixes.
748 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
750 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
751 Unlike the original bugzilla I have changed all shell scripts in src tree.
753 NM/33 Bugzilla 898: Transport filter timeout fix.
754 Patch by Todd Rinaldo.
756 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mistmatches.
757 Patch by Serge Demonchaux.
759 NM/35 Bugzilla 39: Base64 decode bug fixes.
760 Patch by Jakob Hirsch.
762 NM/36 Bugzilla 909: Correct connect() call in dcc code.
764 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
766 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
768 NM/39 Bugzilla 911: Fixed MakeLinks build script.
774 TK/01 Add preliminary DKIM support. Currently requires a forked version of
775 ALT-N's libdkim that I have put here:
776 http://duncanthrax.net/exim-experimental/
778 Note to Michael Haardt: I had to rename some vars in sieve.c. They
779 were called 'true' and it seems that C99 defines that as a reserved
780 keyword to be used with 'bool' variable types. That means you could
781 not include C99-style headers which use bools without triggering
782 build errors in sieve.c.
784 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
785 as mailq or other aliases. Changed the --help handling significantly
786 to do whats expected. exim_usage() emits usage/help information.
788 SC/01 Added the -bylocaldomain option to eximstats.
790 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
792 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
794 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
800 PH/01 Another patch from the Sieve maintainer.
802 PH/02 When an IPv6 address is converted to a string for single-key lookup
803 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
804 dots are used instead of colons so that keys in lsearch files need not
805 contain colons. This was done some time before quoting was made available
806 in lsearch files. However, iplsearch files do require colons in IPv6 keys
807 (notated using the quote facility) so as to distinguish them from IPv4
808 keys. This meant that lookups for IP addresses in host lists did not work
809 for iplsearch lookups.
811 This has been fixed by arranging for IPv6 addresses to be expressed with
812 colons if the lookup type is iplsearch. This is not incompatible, because
813 previously such lookups could never work.
815 The situation is now rather anomolous, since one *can* have colons in
816 ordinary lsearch keys. However, making the change in all cases is
817 incompatible and would probably break a number of configurations.
819 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
822 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
823 conversion specification without a maximum field width, thereby enabling
824 a rogue spamd server to cause a buffer overflow. While nobody in their
825 right mind would setup Exim to query an untrusted spamd server, an
826 attacker that gains access to a server running spamd could potentially
827 exploit this vulnerability to run arbitrary code as the Exim user.
829 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
830 $primary_hostname instead of what libspf2 thinks the hosts name is.
832 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
833 a directory entry by the name of the lookup key. Previously, if a
834 symlink pointed to a non-existing file or a file in a directory that
835 Exim lacked permissions to read, a lookup for a key matching that
836 symlink would fail. Now it is enough that a matching directory entry
837 exists, symlink or not. (Bugzilla 503.)
839 PH/03 The body_linecount and body_zerocount variables are now exported in the
842 PH/04 Added the $dnslist_matched variable.
844 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
845 This means they are set thereafter only if the connection becomes
848 PH/06 Added the client_condition to authenticators so that some can be skipped
849 by clients under certain conditions.
851 PH/07 The error message for a badly-placed control=no_multiline_responses left
852 "_responses" off the end of the name.
854 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
856 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
857 (without spaces) instead of just copying the configuration text.
859 PH/10 Added the /noupdate option to the ratelimit ACL condition.
861 PH/11 Added $max_received_linelength.
863 PH/12 Added +ignore_defer and +include_defer to host lists.
865 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
866 way in which PCRE > 7.0 is built.
868 PH/14 Implemented queue_only_load_latch.
870 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
871 MAIL command. The effect was to mangle the value on 64-bit systems.
873 PH/16 Another patch from the Sieve maintainer.
875 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
877 PH/18 If a system quota error occurred while trying to create the file for
878 a maildir delivery, the message "Mailbox is full" was not appended to the
879 bounce if the delivery eventually timed out. Change 4.67/27 below applied
880 only to a quota excession during the actual writing of the file.
882 PH/19 It seems that peer DN values may contain newlines (and other non-printing
883 characters?) which causes problems in log lines. The DN values are now
884 passed through string_printing() before being added to log lines.
886 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
887 and InterBase are left for another time.)
889 PH/21 Added message_body_newlines option.
891 PH/22 Guard against possible overflow in moan_check_errorcopy().
893 PH/23 POSIX allows open() to be a macro; guard against that.
895 PH/24 If the recipient of an error message contained an @ in the local part
896 (suitably quoted, of course), incorrect values were put in $domain and
897 $local_part during the evaluation of errors_copy.
903 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
904 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
907 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
908 issue a MAIL command.
910 PH/02 In an ACL statement such as
912 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
914 if a client was not listed at all, or was listed with a value other than
915 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
916 the condition was not true (as it should be), so access was not denied.
917 The bug was that the ! inversion was incorrectly passed on to the second
918 item. This has been fixed.
920 PH/03 Added additional dnslists conditions == and =& which are different from
921 = and & when the dns lookup returns more than one IP address.
923 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
924 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
926 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
927 FSYNC, which compiles an option called disable_fsync that allows for
928 bypassing fsync(). The documentation is heavily laced with warnings.
930 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
932 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
933 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
934 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
935 including adding "make clean"; (3) Added -fPIC when compiling the test
936 dynamically loaded module, to get rid of a warning.
938 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
939 message fails, move_frozen_messages = true and ignore_bounce_errors_after
940 = 0s. The bug is otherwise harmless.
942 PH/07 There was a bug in the dovecot authenticator such that the value of
943 $auth1 could be overwritten, and so not correctly preserved, after a
944 successful authentication. This usually meant that the value preserved by
945 the server_setid option was incorrect.
947 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
949 PH/09 Installed PCRE release 7.0.
951 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
952 run for batched SMTP input. It is now run at the start of every message
953 in the batch. While fixing this I discovered that the process information
954 (output by running exiwhat) was not always getting set for -bs and -bS
955 input. This is fixed, and it now also says "batched" for BSMTP.
957 PH/11 Added control=no_pipelining.
959 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
960 patch, slightly modified), and move the expansion of helo_data till after
961 the connection is made in the smtp transport (so it can use these
964 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
966 PH/14 Added log_selector = +pid.
968 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
970 PH/16 Add ${if forany and ${if forall.
972 PH/17 Added dsn_from option to vary the From: line in DSNs.
974 PH/18 Flush SMTP output before performing a callout, unless control =
975 no_callout_flush is set.
977 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
978 was true (the default) a successful delivery failed to delete the retry
979 item, thus causing premature timeout of the address. The bug is now
982 PH/20 Added hosts_avoid_pipelining to the smtp transport.
984 PH/21 Long custom messages for fakedefer and fakereject are now split up
985 into multiline reponses in the same way that messages for "deny" and
986 other ACL rejections are.
988 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
989 with slight modification.
991 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
992 draft, changing the syntax and factoring some duplicate code".
994 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
995 for deliveries of the second and subsequent messages over the same SMTP
998 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
999 ${reduce, with only minor "tidies".
1001 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1003 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1004 expansion side effects.
1006 PH/27 When a message times out after an over-quota error from an Exim-imposed
1007 quota, the bounce message says "mailbox is full". This message was not
1008 being given when it was a system quota that was exceeded. It now should
1011 MH/03 Made $recipients available in local_scan(). local_scan() already has
1012 better access to the recipient list through recipients_list[], but
1013 $recipients can be useful in postmaster-provided expansion strings.
1015 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1016 in the case of a MAIL command with additional options following the
1017 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1018 were accidentally chopped off.
1020 PH/29 SMTP synchronization checks are implemented when a command is read -
1021 there is a check that no more input is waiting when there shouldn't be
1022 any. However, for some commands, a delay in an ACL can mean that it is
1023 some time before the response is written. In this time, more input might
1024 arrive, invalidly. So now there are extra checks after an ACL has run for
1025 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1026 pipelining has not been advertised.
1028 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1030 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1031 returned in the SMTP response when smtp_return_error_details was false.
1032 This has been fixed.
1034 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1035 instead of the C I/O that was originally supplied, because problems were
1036 reported on Solaris.
1038 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1039 Exim which did not show up earlier: it was assuming that a call to
1040 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1041 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1042 was a macro that became an assignment, so it seemed to work. This has
1043 changed to a proper function call with a void return, hence the compile
1044 error. Exim's code has been fixed.
1046 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1049 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1051 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1053 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1054 because it turns out to be too big or there is a timeout) there is no
1055 "Completed" line in the log. When some messages of this type were
1056 selected by exigrep, they were listed as "not completed". Others were
1057 picked up by some special patterns. I have improved the selection
1058 criteria to be more general.
1060 PH/38 The host_find_failed option in the manualroute router can now be set
1061 to "ignore", to completely ignore a host whose IP address cannot be
1062 found. If all hosts are ignored, the behaviour is controlled by the new
1063 host_all_ignored option.
1065 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1066 homing or because of multiple MX records with /mx) generated more than
1067 one IP address, and the following item turned out to be the local host,
1068 all the secondary addresses of the first item were incorrectly removed
1069 from the list, along with the local host and any following hosts (which
1070 is what is supposed to happen).
1072 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1073 whoever called Exim into the -H file. In the case of the daemon it was
1074 behaving confusingly. When first started, it used values for whoever
1075 started the daemon, but after a SIGHUP it used the Exim user (because it
1076 calls itself on a restart). I have changed the code so that it now always
1079 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1080 message are rejected with the same error (e.g. no authentication or bad
1081 sender address), and a DATA command is nevertheless sent (as can happen
1082 with PIPELINING or a stupid MUA), the error message that was given to the
1083 RCPT commands is included in the rejection of the DATA command. This is
1084 intended to be helpful for MUAs that show only the final error to their
1087 PH/42 Another patch from the Sieve maintainer.
1089 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1090 Eximstats - Fixed some broken HTML links and added missing column headers
1092 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1093 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1095 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1097 PH/43 Yet another patch from the Sieve maintainer.
1099 PH/44 I found a way to check for a TCP/IP connection going away before sending
1100 the response to the final '.' that terminates a message, but only in the
1101 case where the client has not sent further data following the '.'
1102 (unfortunately, this is allowed). However, in many cases there won't be
1103 any further data because there won't be any more messages to send. A call
1104 to select() can be used: if it shows that the input is "ready", there is
1105 either input waiting, or the socket has been closed. An attempt to read
1106 the next input character can distinguish the two cases. Previously, Exim
1107 would have sent an OK response which the client would never have see.
1108 This could lead to message repetition. This fix should cure that, at
1109 least in a lot of common cases.
1111 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1112 advertised in response to EHLO.
1118 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1119 fixed by 4.65/MH/01 (is this a record?) are fixed:
1121 (i) An empty string was always treated as zero by the numeric comparison
1122 operators. This behaviour has been restored.
1124 (ii) It is documented that the numeric comparison operators always treat
1125 their arguments as decimal numbers. This was broken in that numbers
1126 starting with 0 were being interpreted as octal.
1128 While fixing these problems I realized that there was another issue that
1129 hadn't been noticed. Values of message_size_limit (both the global option
1130 and the transport option) were treated as octal if they started with 0.
1131 The documentation was vague. These values are now always treated as
1132 decimal, and I will make that clear in the documentation.
1138 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1139 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1142 MH/01 Don't check that the operands of numeric comparison operators are
1143 integers when their expansion is in "skipping" mode (fixes bug
1144 introduced by 4.64-PH/07).
1146 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1147 child addresses, Exim now panics and dies. Previously, because the count
1148 is held in a short int, deliveries were likely to be lost. As such a
1149 large number of recipients for a single message is ridiculous
1150 (performance will be very, very poor), I have chosen to impose a limit
1151 rather than extend the field.
1157 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1158 leftover -K file (the existence of which was triggered by #402).
1159 While we were at it, introduced process PID as part of the -K
1160 filename. This should rule out race conditions when creating
1163 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1164 processing considerably. Previous code took too long for large mails,
1165 triggering a timeout which in turn triggers #401.
1167 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1168 in the DK code in transports.c. sendfile() is not really portable,
1169 hence the _LINUX specificness.
1171 TF/01 In the add_headers option to the mail command in an Exim filter,
1172 there was a bug that Exim would claim a syntax error in any
1173 header after the first one which had an odd number of characters
1176 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1177 callout verification, Exim cached a "reject" for the entire domain. This
1178 is correct for most verifications, but it is not correct for a recipient
1179 verification with use_sender or use_postmaster set, because in that case
1180 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1181 case of MAIL FROM:<> rejection from other early rejections (e.g.
1182 rejection of HELO). When verifying a recipient using a non-null MAIL
1183 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1184 Whatever the result of the callout, the value of the domain cache is
1185 left unchanged (for any other kind of callout, getting as far as trying
1186 RCPT means that the domain itself is ok).
1188 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1191 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1192 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1193 session, the daemon ignores ECONNECT errors and logs others; it now
1194 ignores EPIPE as well.
1196 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1197 (quoted-printable decoding).
1199 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1200 later the small subsequent patch to fix an introduced bug.
1202 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1204 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1206 PH/08 An error is now given if message_size_limit is specified negative.
1208 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1209 to be given (somewhat) arbitrary names.
1211 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1214 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1215 miscellaneous code fixes
1217 PH/10 Added the log_reject_target ACL modifier to specify where to log
1220 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1221 hostname. This is wrong, because it relates to the incoming message (and
1222 probably the interface on which it is arriving) and not to the outgoing
1223 callout (which could be using a different interface). This has been
1224 changed to use the value of the helo_data option from the smtp transport
1225 instead - this is what is used when a message is actually being sent. If
1226 there is no remote transport (possible with a router that sets up host
1227 addresses), $smtp_active_hostname is used.
1229 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1230 tweaks were necessary in order to get it to work (see also 21 below):
1231 (a) The code assumed that strncpy() returns a negative number on buffer
1232 overflow, which isn't the case. Replaced with Exim's string_format()
1234 (b) There were several signed/unsigned issues. I just did the minimum
1235 hacking in of casts. There is scope for a larger refactoring.
1236 (c) The code used strcasecmp() which is not a standard C function.
1237 Replaced with Exim's strcmpic() function.
1238 (d) The code set only $1; it now sets $auth1 as well.
1239 (e) A simple test gave the error "authentication client didn't specify
1240 service in request". It would seem that Dovecot has changed its
1241 interface. Fortunately there's a specification; I followed it and
1242 changed what the client sends and it appears to be working now.
1244 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1247 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1248 address A is aliased to B and C, where B exists and C does not. Without
1249 -v the output is "A verified" because verification stops after a
1250 successful redirection if more than one address is generated. However,
1251 with -v the child addresses are also verified. Exim was outputting "A
1252 failed to verify" and then showing the successful verification for C,
1253 with its parentage. It now outputs "B failed to verify", showing B's
1254 parentage before showing the successful verification of C.
1256 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1257 look up a TXT record in a specific list after matching in a combined
1260 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1261 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1262 they consult the DNS. I had assumed they would set it the way they
1263 wanted; and indeed my experiments on Linux seem to show that in some
1264 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1265 To be on the safe side, however, I have now made the interface to
1266 host_find_byname() similar to host_find_bydns(), with an argument
1267 containing the DNS resolver options. The host_find_byname() function now
1268 sets these options at its start, just as host_find_bydns() does. The smtp
1269 transport options dns_qualify_single and dns_search_parents are passed to
1270 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1271 of host_find_byname() use the default settings of RES_DEFNAMES
1272 (qualify_single) but not RES_DNSRCH (search_parents).
1274 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1275 spool_read_header() do less string testing, by means of a preliminary
1276 switch on the second character of optional "-foo" lines. (This is
1277 overdue, caused by the large number of possibilities that now exist.
1278 Originally there were few.) While I was there, I also converted the
1279 str(n)cmp tests so they don't re-test the leading "-" and the first
1280 character, in the hope this might squeeze out yet more improvement.
1282 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1283 flag allowing group syntax was set by the header_syntax check but not
1284 turned off, possible causing trouble later; (2) The flag was not being
1285 set at all for the header_verify test, causing "group"-style headers to
1286 be rejected. I have now set it in this case, and also caused header_
1287 verify to ignore an empty address taken from a group. While doing this, I
1288 came across some other cases where the code for allowing group syntax
1289 while scanning a header line wasn't quite right (mostly, not resetting
1290 the flag correctly in the right place). These bugs could have caused
1291 trouble for malformed header lines. I hope it is now all correct.
1293 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1294 with the "reply" argument non-NULL. The code, however (which originally
1295 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1296 but it didn't always do it. This confused somebody who was copying the
1297 code for some other use. I have removed all the tests.
1299 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1300 feature that was used to support insecure browsers during the U.S. crypto
1301 embargo. It requires special client support, and Exim is probably the
1302 only MTA that supported it -- and would never use it because real RSA is
1303 always available. This code has been removed, because it had the bad
1304 effect of slowing Exim down by computing (never used) parameters for the
1305 RSA_EXPORT functionality.
1307 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1308 authenticator to fail if there's a tab character in the incoming data
1309 (there should never be unless someone is messing about, as it's supposed
1310 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1311 if the connection is using TLS or if the remote IP is the same as the
1312 local IP, and the "valid-client-cert option" if a client certificate has
1315 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1316 authenticators. This can be used for authorization after authentication
1317 succeeds. (In the case of plaintext, it servers for both authentication
1320 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1321 if any retry times were supplied.
1323 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1324 connection, where there is no client IP address to check. In this
1325 situation, the verify now always succeeds.
1327 PH/25 Applied John Jetmore's -Mset patch.
1329 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1331 PH/27 In a string expansion for a processed (not raw) header when multiple
1332 headers of the same name were present, leading whitespace was being
1333 removed from all of them, but trailing whitespace was being removed only
1334 from the last one. Now trailing whitespace is removed from each header
1335 before concatenation. Completely empty headers in a concatenation (as
1336 before) are ignored.
1338 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1339 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1341 PH/29 [Removed. This was a change that I later backed out, and forgot to
1342 correct the ChangeLog entry (that I had efficiently created) before
1343 committing the later change.]
1345 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1346 address errors (4xx response to RCPT) over the same connection as other
1347 messages routed to the same hosts. Such deliveries are always "forced",
1348 so retry times are not inspected. This resulted in far too many retries
1349 for the affected addresses. The effect occurred only when there were more
1350 hosts than the hosts_max_try setting in the smtp transport when it had
1351 the 4xx errors. Those hosts that it had tried were not added to the list
1352 of hosts for which the message was waiting, so if all were tried, there
1353 was no problem. Two fixes have been applied:
1355 (i) If there are any address or message errors in an SMTP delivery, none
1356 of the hosts (tried or untried) are now added to the list of hosts
1357 for which the message is waiting, so the message should not be a
1358 candidate for sending over the same connection that was used for a
1359 successful delivery of some other message. This seems entirely
1360 reasonable: after all the message is NOT "waiting for some host".
1361 This is so "obvious" that I'm not sure why it wasn't done
1362 previously. Hope I haven't missed anything, but it can't do any
1363 harm, as the worst effect is to miss an optimization.
1365 (ii) If, despite (i), such a delivery is accidentally attempted, the
1366 routing retry time is respected, so at least it doesn't keep
1367 hammering the server.
1369 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1370 in ${readsocket because some servers need this prod.
1372 PH/32 Added some extra debug output when updating a wait-xxx database.
1374 PH/33 The hint "could be header name not terminated by colon", which has been
1375 given for certain expansion errors for a long time, was not being given
1376 for the ${if def:h_colon_omitted{... case.
1378 PH/34 The spec says: "With one important exception, whenever a domain list is
1379 being scanned, $domain contains the subject domain." There was at least
1380 one case where this was not true.
1382 PH/35 The error "getsockname() failed: connection reset by peer" was being
1383 written to the panic log as well as the main log, but it isn't really
1384 panic-worthy as it just means the connection died rather early on. I have
1385 removed the panic log writing for the ECONNRESET error when getsockname()
1388 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1389 runs only) independently of the message's sender address. This meant
1390 that, if the 4xx error was in fact related to the sender, a different
1391 message to the same recipient with a different sender could confuse
1392 things. In particualar, this can happen when sending to a greylisting
1393 server, but other circumstances could also provoke similar problems.
1394 I have changed the default so that the retry time for these errors is now
1395 based a combination of the sender and recipient addresses. This change
1396 can be overridden by setting address_retry_include_sender=false in the
1399 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1400 remote server are returned as part of bounce messages. This was not
1401 happening for LMTP over a pipe (the lmtp transport), but now it is the
1402 same for both kinds of LMTP.
1404 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1405 in header lines that were in fact CNAMEs. This is no longer the case.
1407 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1408 and queue runs started by the daemon processed all messages. This has
1409 been fixed so that -R and -S can now usefully be given with -q<time>.
1411 PH/40 Import PCRE release 6.7 (fixes some bugs).
1413 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1415 PH/42 Give an error if -q is specified more than once.
1417 PH/43 Renamed the variables $interface_address and $interface_port as
1418 $received_ip_address and $received_port, to make it clear that these
1419 values apply to message reception, and not to the outgoing interface when
1420 a message is delivered. (The old names remain recognized, of course.)
1422 PH/44 There was no timeout on the connect() call when using a Unix domain
1423 socket in the ${readsocket expansion. There now is.
1425 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1426 be meaningful with "accept".
1428 SC/01 Eximstats V1.43
1429 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1431 SC/02 Eximstats V1.44
1432 Use a glob alias rather than an array ref in the generated
1433 parser. This improves both readability and performance.
1435 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1436 Collect SpamAssassin and rejection statistics.
1437 Don't display local sender or destination tables unless
1438 there is data to show.
1439 Added average volumes into the top table text output.
1441 SC/04 Eximstats V1.46
1442 Collect data on the number of addresses (recipients)
1443 as well as the number of messages.
1445 SC/05 Eximstats V1.47
1446 Added 'Message too big' to the list of mail rejection
1447 reasons (thanks to Marco Gaiarin).
1449 SC/06 Eximstats V1.48
1450 Mainlog lines which have GMT offsets and are too short to
1451 have a flag are now skipped.
1453 SC/07 Eximstats V1.49 (Alain Williams)
1454 Added the -emptyok flag.
1456 SC/08 Eximstats V1.50
1457 Fixes for obtaining the IP address from reject messages.
1459 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1460 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1461 whitesspace changes from 4.64-PH/27
1463 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1466 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1467 are found, allow negative numbers in numeric criteria)
1469 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1471 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1472 to match changes made in 4.64-PH/43
1474 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1476 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1477 "domain" is actually an IP address, and force a failure. This locks out
1478 those revolvers/nameservers that support "A-for-A" lookups, in
1479 contravention of the specifications.
1481 PH/48 When a host name was looked up from an IP address, and the subsequent
1482 forward lookup of the name timed out, the host name was left in
1483 $sender_host_name, contrary to the specification.
1485 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1486 restricted to single-key lookups, Exim was not diagnosing an error if
1487 * or *@ was used with a query-style lookup.
1489 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1491 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1492 long ago, but noone interested enough thought of it. Let's just say that
1493 the "1.1" means that there are some new functions that weren't there at
1494 some point in the past.
1496 PH/51 Error processing for expansion failure of helo_data from an smtp
1497 transport during callout processing was broken.
1499 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1500 tested/used via the -bh/-bhc/-bs options.
1502 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1503 bug, fixed in subsequent PCRE releases).
1505 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1506 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1508 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1514 SC/01 Use a glob alias rather than an array ref in eximstats generated
1515 parser. This improves both readability and performance.
1517 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1518 Don't display local sender or destination tables in eximstats unless
1519 there is data to show.
1520 Added average volumes into the eximstats top table text output.
1522 SC/03 Collect data on the number of addresses (recipients) as well
1523 as the number of messages in eximstats.
1525 TF/01 Correct an error in the documentation for the redirect router. Exim
1526 does (usually) call initgroups() when daemonizing.
1528 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1529 with consistent privilege compared to when running as a daemon.
1531 TF/03 Note in the spec that $authenticated_id is not set for local
1532 submissions from trusted users.
1534 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1535 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1537 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1538 by adding some example configuration directives to the default
1539 configuration file. A little bit of work is required to uncomment the
1540 directives and define how usernames and passwords are checked, but
1541 there is now a framework to start from.
1543 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1544 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1545 without this. I don't know how relevant this is to other LDAP libraries.
1547 PH/02 Add the verb name to the "unknown ACL verb" error.
1549 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1551 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1553 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1554 directory not expanded when it should be if an expanded home directory
1555 was set for the address (which is overridden by the transport).
1557 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1560 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1561 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1562 because it is too late at that time, and has no effect.
1564 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1565 security issue with \' (bugzilla #107). I could not use the
1566 PQescapeStringConn() function, because it needs a PGconn value as one of
1569 PH/08 When testing addresses using -bt, indicate those final addresses that
1570 are duplicates that would not cause an additional delivery. At least one
1571 person was confused, thinking that -bt output corresponded to deliveries.
1572 (Suppressing duplicates isn't a good idea as you lose the information
1573 about possibly different redirections that led to the duplicates.)
1575 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1576 systems where poll() doesn't work, in particular OS X.
1578 PH/10 Added more information to debugging output for retry time not reached.
1580 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1581 operations in malware.c.
1583 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1586 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1587 syslog_duplication set false, log lines that would normally be written
1588 both the the main log and to the reject log were not written to syslog at
1591 PH/14 In the default configuration, change the use of "message" in ACL warn
1592 statements to "add_header".
1594 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1595 not followed by a command (e.g. "seen endif").
1597 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1598 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1601 PH/17 Added extra conditions to the default value of delay_warning_condition
1605 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1606 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1607 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1610 The Auto-Submitted: and various List- headers are standardised, whereas I
1611 don't think Precedence: ever was.
1613 PH/18 Refactored debugging code in route_finduser() to show more information,
1614 in particular, the error code if getpwnam() issues one.
1616 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1617 This is apparently needed in addition to the PH/07 change above to avoid
1618 any possible encoding problems.
1620 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1621 but not after initializing Perl.
1623 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1624 output them only if debugging. By default they are written stderr,
1625 apparently, which is not desirable.
1627 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1630 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1633 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1635 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1636 authenticated or an ident call has been made. Suppress the default
1637 values for $authenticated_id and $authenticated_sender (but permit -oMai
1638 and -oMas) when testing with -bh.
1640 PH/24 Re-jigged the order of the tests in the default configuration so that the
1641 tests for valid domains and recipients precede the DNS black list and CSA
1642 tests, on the grounds that those ones are more expensive.
1644 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1645 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1646 This bug exists in every version of Exim that I still have, right back to
1649 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1650 However, an attempt to turn on case-sensitivity in a regex key by
1651 including (?-i) didn't work because the subject string was already
1652 lowercased, and the effects were non-intuitive. It turns out that a
1653 one-line patch can be used to allow (?-i) to work as expected.
1659 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1660 other effects) broke the use of negated acl sub-conditions.
1662 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1665 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1666 "Deny" causes Exim to reject the incoming connection with a 554 error.
1667 Unfortunately, if there is a major crisis, such as a disk failure,
1668 tcp-wrappers gives "deny", whereas what one would like would be some
1669 kind of temporary error. A kludge has been added to help with this.
1670 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1671 554 error is used if errno is still zero or contains ENOENT (which occurs
1672 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1675 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1677 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1678 errors. Otherwise a message that provokes a temporary error (when other
1679 messages do not) can cause a whole host to time out.
1681 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1682 addresses were routed directly to files or pipes from a redirect router.
1683 File deliveries just didn't batch; pipe deliveries might have suffered
1686 PH/06 A failure to get a lock for a hints database would erroneously always say
1687 "Failed to get write lock", even when it was really a read lock.
1689 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1690 of 0600. This has been changed to use the value of the lockfile_mode
1691 option (which defaults to 0600).
1693 PH/08 Applied small patch from the Sieve maintainer.
1695 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1696 folder from quota calculations, a direct delivery into this folder messed
1697 up the contents of the maildirsize file. This was because the regex was
1698 used only to exclude .Trash (or whatever) when the size of the mailbox
1699 was calculated. There was no check that a delivery was happening into an
1700 excluded directory. This bug has been fixed by ignoring all quota
1701 processing for deliveries into excluded directories.
1703 PH/10 Added the maildirfolder_create_regex option to appendfile.
1709 PH/01 The code for finding all the local interface addresses on a FreeBSD
1710 system running IPv6 was broken. This may well have applied to all BSD
1711 systems, as well as to others that have similar system calls. The broken
1712 code found IPv4 interfaces correctly, but gave incorrect values for the
1713 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1714 that it would not match correctly against @[] and not recognize the IPv6
1717 PH/02 The ipliteral router was not recognizing addresses of the form user@
1718 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1720 PH/03 Added disable_ipv6.
1722 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1723 decoded form, because it is most often used to construct To: headers
1724 lines in autoreplies, and the decoded form may well be syntactically
1725 invalid. However, $reply_address has leading white space removed, and all
1726 newlines turned into spaces so that the autoreply transport does not
1729 PH/05 If group was specified without a user on a router, and no group or user
1730 was specified on a transport, the group from the router was ignored.
1732 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1733 for visible compile-time settings that can be used to change these
1734 numbers, for those that want even more. Backwards compatibility with old
1735 spool files has been maintained. However, going back to a previous Exim
1736 release will lost any variables that are in spool files.
1738 PH/07 Two small changes when running in the test harness: increase delay when
1739 passing a TCP/IP connection to a new process, in case the original
1740 process has to generate a bounce, and remove special handling of
1741 127.0.0.2 (sic), which is no longer necessary.
1743 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1744 be the same on different OS.
1746 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1749 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1750 whether --show-vars was specified or not
1752 JJ/02 exipick: Added support for new ACL variable spool format introduced
1755 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1756 syntactically invalid From: or Reply-to: line, and a filter used this to
1757 generate an autoreply, and therefore failed to obtain an address for the
1758 autoreply, Exim could try to deliver to a non-existent relative file
1759 name, causing unrelated and misleading errors. What now happens is that
1760 it logs this as a hard delivery error, but does not attempt to create a
1763 PH/11 The exinext utility has a -C option for testing purposes, but although
1764 the given file was scanned by exinext itself; it wasn't being passed on
1765 when Exim was called.
1767 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1768 an end-of-file indication when reading a command response.
1770 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1771 compiled. In many other places in Exim, IPv6 addresses are always
1772 recognized, so I have changed this. It also means that IPv4 domain
1773 literals of the form [IPV4:n.n.n.n] are now always recognized.
1775 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1776 used if the router is not running as root, for example, when verifying at
1777 ACL time, or when using -bh. The debugging output from this situation was
1778 non-existent - all you got was a failure to exec. I have made two
1781 (a) Failures to set uid/gid, the current directory, or a process leader
1782 in a subprocess such as that created by queryprogram now generate
1783 suitable debugging ouput when -d is set.
1785 (b) The queryprogram router detects when it is not running as root,
1786 outputs suitable debugging information if -d is set, and then runs
1787 the subprocess without attempting to change uid/gid.
1789 PH/15 Minor change to Makefile for building test_host (undocumented testing
1792 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1793 additional section of a DNS packet that returns MX or SRV records.
1794 Instead, it always explicitly searches for A/AAAA records. This avoids
1795 major problems that occur when a DNS server includes only records of one
1796 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1797 fixed another bug: if SRV records were looked up and the corresponding
1798 address records were *not* found in the additional section, the port
1799 values from the SRV records were lost.
1801 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1802 using the correct key (the original address) when searching the retry
1803 rules in order to find which one to use for generating the retry hint.
1805 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1806 adding the default one. Similarly, if it contains a Reply-To: header, the
1807 errors_reply_to option, if set, is not used.
1809 PH/19 When calculating a retry time, Exim used to measure the "time since
1810 failure" by looking at the "first failed" field in the retry record. Now
1811 it does not use this if it is later than than the arrival time of the
1812 message. Instead it uses the arrival time. This makes for better
1813 behaviour in cases where some deliveries succeed, thus re-setting the
1814 "first failed" field. An example is a quota failure for a huge message
1815 when small messages continue to be delivered. Without this change, the
1816 "time since failure" will always be short, possible causing more frequent
1817 delivery attempts for the huge message than are intended.
1818 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1820 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1821 $1, $2, $3) because the numerical variables can be reset during some
1822 expansion items (e.g. "match"), thereby losing the authentication data.
1824 PH/21 Make -bV show the size of off_t variables so that the test suite can
1825 decide whether to run tests for quotas > 2G.
1827 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1828 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1829 filecount value is greater than 2G or if a quota value is greater than 2G
1830 on a system where the size of off_t is not greater than 4, a panic error
1833 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1834 never match. The debug and -bh output now contains an explicit error
1835 message indicating a malformed IPv4 address or mask.
1837 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1838 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1839 PH/23 above applies.
1841 PH/25 Do not write to syslog when running in the test harness. The only
1842 occasion when this arises is a failure to open the main or panic logs
1843 (for which there is an explicit test).
1845 PH/26 Added the /no_tell option to "control=freeze".
1847 PH/27 If a host name lookup failed very early in a connection, for example, if
1848 the IP address matched host_lookup and the reverse lookup yielded a name
1849 that did not have a forward lookup, an error message of the form "no IP
1850 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1851 could be logged. Now it outputs the IP address instead of "NULL".
1853 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1854 allows the sender and the authenticated sender to be set when
1855 submitting a message from within Exim. Since child_open_exim() is
1856 documented for local_scan(), the new function should be too.
1858 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1859 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1860 results in an empty string is now treated as unset.
1862 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1864 PH/31 Added sender_verify_fail logging option.
1866 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1867 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1868 tidied the source and removed it altogether.
1870 PH/33 When a queue run was abandoned because the load average was too high, a
1871 log line was always written; now it is written only if the queue_run log
1872 selector is set. In addition, the log line for abandonment now contains
1873 information about the queue run such as the pid. This is always present
1874 in "start" and "stop" lines but was omitted from the "abandon" line.
1876 PH/34 Omit spaces between a header name and the colon in the error message that
1877 is given when verify = headers_syntax fails (if there are lots of them,
1878 the message gets confusing).
1880 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1881 names, as there are now some PTR records that contain slashes. This check
1882 is only to protect against broken name servers that fall over on strange
1883 characters, so the fact that it applies to all lookups doesn't matter.
1885 PH/36 Now that the new test suite is complete, we can remove some of the
1886 special code in Exim that was needed for the old test suite. For example,
1887 sorting DNS records because real resolvers return them in an arbitrary
1888 order. The new test suite's fake resolver always returns records in the
1891 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1892 bounces) except when queue_only is set, to avoid logging races between
1893 the different processes.
1895 PH/38 Panic-die if .include specifies a non-absolute path.
1897 PH/39 A tweak to the "H" retry rule from its user.
1899 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1900 a label. They prevented compilation on older perls.
1902 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1903 a warning to be raised on newish perls.
1905 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1906 on queue. Changes to match documented behaviour of showing count of
1907 messages matching specified criteria.
1909 PH/40 Changed the default ident timeout from 30s to 5s.
1911 PH/41 Added support for the use of login_cap features, on those BSD systems
1912 that have them, for controlling the resources used by pipe deliveries.
1914 PH/42 The content-scanning code uses fopen() to create files in which to put
1915 message data. Previously it was not paying any attention to the mode of
1916 the files. Exim runs with umask(0) because the rest of the code creates
1917 files with open(), and sets the required mode explicitly. Thus, these
1918 files were ending up world-writeable. This was not a big issue, because,
1919 being within the spool directory, they were not world-accessible. I have
1920 created a function called modefopen, which takes an additional mode
1921 argument. It sets umask(777), creates the file, chmods it to the required
1922 mode, then resets the umask. All the relevant calls to fopen() in the
1923 content scanning code have been changed to use this function.
1925 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1926 to 24 hours. This avoids potential overflow problems when processing G
1927 and H retry rules. I suspect nobody ever tinkers with this value.
1929 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1931 PH/45 When the plaintext authenticator is running as a client, the server's
1932 challenges are checked to ensure they are valid base64 strings. By
1933 default, the authentication attempt is cancelled if an invalid string is
1934 received. Setting client_ignore_invalid_base64 true ignores these errors.
1935 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1936 they are received. Thus, the responses can be made to depend on the
1937 challenges. If an invalid string is ignored, an empty string is placed in
1940 PH/46 Messages that are created by the autoreply transport now contains a
1941 References: header, in accordance with RFCs 2822 and 3834.
1943 PH/47 Added authenticated_sender_force to the smtp transport.
1945 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1947 PH/49 Installed latest patch from the Sieve maintainer.
1949 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1950 was also set, the appendfile transport was unnecessarily scanning a
1951 directory of message files (e.g. for maildir delivery) to find the count
1952 of files (along with the size), even though it did not need this
1953 information. It now does the scan only if it needs to find either the
1954 size of the count of files.
1956 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1958 PH/52 Two bugs concerned with error handling when the smtp transport is
1961 (i) Exim was not creating retry information for temporary errors given
1962 for individual recipients after the DATA command when the smtp transport
1963 was used in LMTP mode. This meant that they could be retried too
1964 frequently, and not timed out correctly.
1966 (ii) Exim was setting the flag that allows error details to be returned
1967 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1968 recipients that were returned after the DATA command.
1970 PH/53 This is related to PH/52, but is more general: for any failing address,
1971 when detailed error information was permitted to be returned to the
1972 sender, but the error was temporary, then after the final timeout, only
1973 "retry timeout exceeded" was returned. Now it returns the full error as
1974 well as "retry timeout exceeded".
1976 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1977 do this, and (what is worse) MTAs that accept it.
1979 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1980 will now be deprecated.
1982 PH/56 New os.c-cygwin from the Cygwin maintainer.
1984 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1985 formats (previously only available in exim formats via -bpr, -bpru,
1986 and -bpra. Now also available in native and exiqgrep formats)
1988 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1989 with very large, slow to parse queues
1991 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1993 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1995 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1996 responses to authentication challenges, though it was showing the
1997 challenges; (ii) I've removed the CR characters from the debug output for
2000 PH/58 Allow for the insertion of a newline as well as a space when a string
2001 is turned into more than one encoded-word during RFC 2047 encoding. The
2002 Sieve code now uses this.
2004 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2005 data_4xx, lost_connection, tls_required.
2007 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2008 message was being sent as an SMTP response.
2010 PH/61 Add -l and -k options to exicyclog.
2012 PH/62 When verifying, if an address was redirected to one new address, so that
2013 verification continued, and the new address failed or deferred after
2014 having set something in $address_data, the value of $address_data was not
2015 passed back to the ACL. This was different to the case when no
2016 redirection occurred. The value is now passed back in both cases.
2018 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2019 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2020 use login_cap.h, so on its own it isn't the distinguishing feature. The
2021 new name refers directly to the setclassresources() function.
2023 PH/65 Added configuration files for NetBSD3.
2025 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2027 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2028 is preferred over IPv4.
2030 PH/68 The bounce_return_message and bounce_return_body options were not being
2031 honoured for bounces generated during the reception of non-SMTP messages.
2032 In particular, this applied to messages rejected by the ACL. This bug has
2033 been fixed. However, if bounce_return_message is true and bounce_return_
2034 body is false, the headers that are returned for a non-SMTP message
2035 include only those that have been read before the error was detected.
2036 (In the case of an ACL rejection, they have all been read.)
2038 PH/69 The HTML version of the specification is now built in a directory called
2039 spec_html instead of spec.html, because the latter looks like a path with
2040 a MIME-type, and this confuses some software.
2042 PH/70 Catch two compiler warnings in sieve.c.
2044 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2045 function verify_get_ident() calls ip_connect() to connect a socket, but
2046 if the "connect()" function timed out, ip_connect() used to close the
2047 socket. However, verify_get_ident() also closes the socket later, and in
2048 between Exim writes to the log, which may get opened at this point. When
2049 the socket was closed in ip_connect(), the log could get the same file
2050 descriptor number as the socket. This naturally causes chaos. The fix is
2051 not to close the socket in ip_connect(); the socket should be closed by
2052 the function that creates it. There was only one place in the code where
2053 this was missing, in the iplookup router, which I don't think anybody now
2054 uses, but I've fixed it anyway.
2056 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2057 well as to direct DNS lookups. Otherwise the handling of names in host
2058 lists is inconsistent and therefore confusing.
2064 PH/01 Two changes to the default runtime configuration:
2066 (1) Move the checks for relay_from_hosts and authenticated clients from
2067 after to before the (commented out) DNS black list checks.
2069 (2) Add control=submission to the relay_from_hosts and authenticated
2070 clients checks, on the grounds that messages accepted by these
2071 statements are most likely to be submissions.
2073 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2075 (1) Generate an error if the third argument for the ${prvs expansion is
2078 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2081 (3) Reset the variables that are obtained from the first argument of
2082 ${prvscheck and used in the second argument before leaving the code,
2083 because their memory is reclaimed, so using them afterwards may do
2086 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2087 one (it's much easier than Tom thought :-).
2089 (5) Because of (4), we can now allow for the use of $prvscheck_result
2090 inside the third argument.
2092 PH/03 For some reason, the default setting of PATH when running a command from
2093 a pipe transport was just "/usr/bin". I have changed it to
2096 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2097 anything to be listed in the output from -bV.
2099 PH/05 When a filter generated an autoreply, the entire To: header line was
2100 quoted in the delivery log line, like this:
2102 => >A.N.Other <ano@some.domain> <original@ddress> ...
2104 This has been changed so that it extracts the operative address. There
2105 may be more than one such address. If so, they are comma-separated, like
2108 => >ano@some.domain,ona@other.domain <original@ddress> ...
2110 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2111 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2112 not being looked up in the rDNS to get a host name, Exim was showing the
2113 IP address twice in Received: lines, even though the IP addresses were
2114 identical. For example:
2116 Received: from [1.2.3.4] (helo=[1.2.3.4])
2118 However, if the real host name was known, it was omitting the HELO data
2119 if it matched the actual IP address. This has been tidied up so that it
2120 doesn't show the same IP address twice.
2122 PH/07 When both +timestamp and +memory debugging was on, the value given by
2123 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2124 called by the debug printing, thereby overwriting the timestamp buffer.
2125 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2127 PH/08 When the original message was included in an autoreply transport, it
2128 always said "this is a copy of the message, including all the headers",
2129 even if body_only or headers_only was set. It now gives an appropriate
2132 PH/09 Applied a patch from the Sieve maintainer which:
2134 o fixes some comments
2135 o adds the (disabled) notify extension core
2136 o adds some debug output for the result of if/elsif tests
2137 o points to the current vacation draft in the documentation
2138 and documents the missing references header update
2142 o fixes a bug in processing the envelope test (when testing
2143 multiple envelope elements, the last element determinted the
2146 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2147 Electronic Mail") by including:
2149 Auto-submitted: auto-generated
2151 in the messages that it generates (bounce messages and others, such as
2152 warnings). In the case of bounce messages for non-SMTP mesages, there was
2153 also a typo: it was using "Auto_submitted" (underscore instead of
2154 hyphen). Since every message generated by Exim is necessarily in response
2155 to another message, thes have all been changed to:
2157 Auto-Submitted: auto-replied
2159 in accordance with these statements in the RFC:
2161 The auto-replied keyword:
2163 - SHOULD be used on messages sent in direct response to another
2164 message by an automatic process,
2166 - MUST NOT be used on manually-generated messages,
2168 - MAY be used on Delivery Status Notifications (DSNs) and Message
2169 Disposition Notifications (MDNs),
2171 - MUST NOT be used on messages generated by automatic or periodic
2172 processes, except for messages which are automatic responses to
2175 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2176 to the default Received: header definition.
2178 PH/12 Added log selector acl_warn_skipped (default on).
2180 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2181 variables because (a) they are in the wrong storage pool and (b) even if
2182 they were copied, it wouldn't work properly because of the caching.
2184 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2185 checking when decoding. Apparently there are clients that generate
2186 overlong encoded strings. Why am I not surprised?
2188 PH/15 If the first argument of "${if match_address" was not empty, but did not
2189 contain an "@" character, Exim crashed. Now it writes a panic log message
2190 and treats the condition as false.
2192 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2194 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2195 extension "envelope-auth". The code is finished and in agreement with
2196 other implementations, but there is no documentation so far and in fact,
2197 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2198 not changing the active code.
2200 Print executed "if" and "elsif" statements when debugging is used. This
2201 helps a great deal to understand what a filter does.
2203 Document more things not specified clearly in RFC3028. I had all this
2204 sorted out, when out of a sudden new issues came to my mind. Oops."
2206 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2209 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2210 canonical form (as documented). However, after a host name lookup from
2211 the IP address, check_host() was doing a simple string comparison with
2212 addresses acquired from the DNS when checking that the found name did
2213 have the original IP as one of its addresses. Since any found IPv6
2214 addresses are likely to be in abbreviated form, the comparison could
2215 fail. Luckily, there already exists a function for doing the comparison
2216 by converting both addresses to binary, so now that is used instead of
2217 the text comparison.
2219 PH/20 There was another similar case to PH/19, when a complete host name was
2220 given in a host list; looking up its IP address could give an abbreviated
2221 form, whereas the current host's name might or might not be abbreviated.
2222 The same fix has been applied.
2228 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2229 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2232 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2233 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2235 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2237 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2238 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2239 Also, for "Auto-Submitted", treat anything other than "no" as
2240 non-personal, in accordance with RFC 3834. (Previously it treated
2241 anything starting "auto-" as non-personal.)
2243 TF/01 The control=submission/name=... option had a problem with syntax
2244 errors if the name included a slash character. The /name= option
2245 now slurps the rest of the string, so it can include any characters
2246 but it must come last in the list of options (after /sender_retain
2249 PH/05 Some modifications to the interface to the fake nameserver for the new
2257 TK/01 Added the "success_on_redirect" address verification option. See
2258 NewStuff for rationale and an example.
2260 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2262 PH/02 Patch to exigrep to allow it to work on syslog lines.
2264 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2265 fread() to skip over the body file's header line, because in Cygwin the
2266 header line is locked and is inaccessible.
2268 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2269 co-exist for some time) to make it clear that it is the Exim ID that is
2270 referenced, not the Message-ID: header line.
2272 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2273 string_format() function, because snprintf() does not exist on all
2276 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2277 ${stat: expansion item.
2279 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2280 protocol synchronization error", to keep the pedants happy.
2282 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2283 well as for IRIX systems, when gcc is being used. See the host.c source
2286 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2288 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2291 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2292 transport and to the smtp transport in LMTP mode.
2294 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2296 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2297 run a filter in a subprocess. This could lead to confusion in subsequent
2298 lookups in the parent process. There should also be a search_tidyup() at
2299 the end of the subprocess.
2301 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2302 only if the host matched helo_try_verify_hosts, which caused the
2303 verification to occur when the EHLO/HELO command was issued. The ACL just
2304 tested the remembered result. Now, if a previous verification attempt has
2305 not happened, "verify = helo" does it there and then.
2307 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2309 TK/03 Fix log output including CR from clamd.
2311 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2312 exist provoked a memory error which could cause a segfault.
2314 PH/15 Installed PCRE 6.2
2316 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2318 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2319 of the problem. Specifically, suggested +O2 rather than +O1 for the
2322 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2324 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2325 record, the port was not correctly logged when the outgoing_port log
2326 selector was set (it logged the transort's default port).
2328 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2329 fallback_hosts, and "hosts" in the smtp transport.
2331 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2332 host errors such as "Connection refused".
2334 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2335 authentication with radiusclient 0.4.9:
2337 - Error returned from rc_read_config was caught wrongly
2338 - Username/password not passed on to radius server due to wrong length.
2340 The presumption is that some radiusclient API changes for 4.51/PH/17
2341 were not taken care of correctly. The code is still untested by me (my
2342 Linux distribution still has 0.3.2 of radiusclient), but it was
2343 contributed by a Radius user.
2345 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2346 expanding the "port" option of the smtp transport.
2348 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2349 while reading a MIME header. Thanks to Tom Hughes for a patch.
2351 PH/24 Include config.h inside local_scan.h so that configuration settings are
2354 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2355 that in an ACL for RCPT (for example), you can examine exactly what was
2358 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2359 commands, but it was not correctly comparing the address with the actual
2360 client host address. Thus, it would show the EHLO address in Received:
2361 header lines when this was not necessary.
2363 PH/27 Added the % operator to ${eval:}.
2365 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2366 it should be ignoring failures (because with -C, for example, it has lost
2367 privilege). It wasn't ignoring creation failures other than "already
2370 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2373 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2374 because an input line was too long, either on its own, or by virtue of
2375 too many continuations, the temporary file was not being removed, and the
2376 return code was incorrect.
2378 PH/31 Missing "BOOL" in function definition in filtertest.c.
2380 PH/32 Applied Sieve patches from the maintainer.
2382 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2384 PH/33 Added "verify = not_blind".
2386 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2387 Local/Makefile (with some defaults set). These are used in built scripts
2388 such as exicyclog, but they have never been used in the exim_install
2389 script (though there are many overriding facilities there). I have
2390 arranged that the exim_install script now takes note of these two
2393 PH/35 Installed configuration files for Dragonfly.
2395 PH/36 When a locally submitted message by a trusted user did not contain a
2396 From: header, and the sender address was obtained from -f or from an SMTP
2397 MAIL command, and the trusted user did not use -F to supply a sender
2398 name, $originator_name was incorrectly used when constructing a From:
2399 header. Furthermore, $originator_name was used for submission mode
2400 messages from external hosts without From: headers in a similar way,
2401 which is clearly wrong.
2403 PH/37 Added control=suppress_local_fixups.
2405 PH/38 When log_selector = +received_sender was set, and the addition of the
2406 sender made the log line's construction buffer exactly full, or one byte
2407 less than full, an overflow happened when the terminating "\n" was
2410 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2411 when the result of a list match is failure because a DNS lookup failed.
2413 PH/40 RM_COMMAND is now used in the building process.
2415 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2416 the "build-* directories that it finds.
2418 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2419 address in a domain literal was a prefix of an interface address.
2421 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2422 when verifying a sender address, unless rewrite_headers is false.
2424 PH/44 Wrote a long comment about why errors_to addresses are verified as
2425 recipients, not senders.
2427 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2428 the ratelimit ACL was added.
2430 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2432 PH/46 Added extra information about PostgreSQL errors to the error string.
2434 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2435 avoiding the need to install special zones in a real server. This is
2436 backwards compatible; if it can't find the fake resolver, it drops back.
2437 Thus, both old and new test suites can be run.
2439 TF/02 Added util/ratelimit.pl
2441 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2442 clock is set back in time.
2444 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2445 Candler <B.Candler@pobox.com>.
2447 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2448 OK for addresses that are the result of redirections.
2450 PH/48 A number of further additions for the benefit of the new test suite,
2451 including a fake gethostbyname() that interfaces to the fake DNS resolver
2454 TF/06 The fix for widen_domains has also been applied to qualify_single and
2455 search_parents which are the other dnslookup options that can cause
2458 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2461 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2463 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2464 service" if it encountered an MX record with an empty target hostname.
2465 The message is now "an MX or SRV record indicated no SMTP service".
2467 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2468 if the DNS of the sending site is misconfigured. This is quite a
2469 common situation. This change restores the behaviour of treating a
2470 helo verification defer as a failure.
2472 PH/51 If self=fail was set on a router, the bounce message did not include the
2473 actual error message.
2479 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2481 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2482 command itself ended in error, the underlying message about the transport
2483 filter timeout was being overwritten with the pipe command error. Now the
2484 underlying error message should be appended to the second error message.
2486 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2488 PH/02 Reduce the amount of output that "make" produces by default. Full output
2489 can still be requested.
2491 PH/03 The warning log line about a condition test deferring for a "warn" verb
2492 was being output only once per connection, rather than after each
2493 occurrence (because it was using the same function as for successful
2494 "warn" verbs). This seems wrong, so I have changed it.
2496 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2497 it should not have, which might have caused a crash in the right
2498 circumstances, but probably never did.
2500 PH/04 Installed a modified version of Tony Finch's patch to make submission
2501 mode fix the return path as well as the Sender: header line, and to
2502 add a /name= option so that you can make the user's friendly name appear
2505 TF/03 Added the control = fakedefer ACL modifier.
2507 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2508 Mark Lowes for thorough testing.
2510 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2512 TK/03 Merged latest SRS patch from Miles Wilton.
2514 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2515 with the definition in sysexits.h (which is #included earlier).
2516 Fortunately, Exim does not actually use EX_OK. The code used to try to
2517 preserve the sysexits.h value, by assumimg that macro definitions were
2518 scanned for macro replacements. I have been disabused of this notion,
2519 so now the code just undefines EX_OK before #including unistd.h.
2521 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2522 in the smtp transport. When a block could not be written in a single
2523 write() function, the timeout was being re-applied to each part-write.
2524 This seems wrong - if the receiver was accepting one byte at a time it
2525 would take for ever. The timeout is now adjusted when this happens. It
2526 doesn't have to be particularly precise.
2528 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2529 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2531 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2532 without a domain if the check to <postmaster@domain> fails.
2534 SC/01 Eximstats: added -xls and the ability to specify output files
2535 (patch written by Frank Heydlauf).
2537 SC/02 Eximstats: use FileHandles for outputing results.
2539 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2541 SC/04 Eximstats: fixed display of large numbers with -nvr option
2543 SC/05 Eximstats: fixed merging of reports with empty tables.
2545 SC/06 Eximstats: added the -include_original_destination flag
2547 SC/07 Eximstats: removed tabs and trailing whitespace.
2549 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2551 TK/06 MBOX spool code: Add real "From " MBOX separator line
2552 so the .eml file is really in mbox format (even though
2553 most programs do not really care). Patch from Alex Miller.
2555 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2556 The latter is generated from $received_to and is only set if the
2557 message has one envelope recipient. SA can use these headers,
2558 obviously out-of-the-box. Patch from Alex Miller.
2560 PH/08 The ${def test on a variable was returning false if the variable's
2561 value was "0", contrary to what the specification has always said!
2562 The result should be true unless the variable is empty.
2564 PH/09 The syntax error of a character other than { following "${if
2565 def:variable_name" (after optional whitespace) was not being diagnosed.
2566 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2567 accidental colon was present, for example, could give incorrect results.
2569 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2570 result is used (not including appendfile, where other changes are about
2573 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2574 This involved changing a lot of size variables from int to off_t. It
2575 should work with maildirs and everything.
2577 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2578 spamd dying while we are connected to it.
2580 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2583 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2584 function for BDB 4.3.
2586 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2588 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2589 the sources for PCRE have been re-arranged and more files are now
2592 PH/15 The code I had for printing potentially long long variables in PH/11
2593 above was not the best (it lost precision). The length of off_t variables
2594 is now inspected at build time, and an appropriate printing format (%ld
2595 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2596 to be "long long int" or "long int". This is needed for the internal
2597 formatting function string_vformat().
2599 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2600 the configuration file to be ":syslog", then the script "guesses" where
2601 the logs files are, rather than using the compiled in default. In our
2602 case the guess is not the same as the compiled default, so the script
2603 suddenly stopped working when I started to use syslog. The patch checks
2604 to see if log_file_path is "". If so, it attempts to read it from exim
2605 with no configuration file to get the compiled in version, before it
2606 falls back to the previous guessing code."
2608 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2609 implementing BATV in an Exim configuration. See NewStuff for the gory
2612 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2613 Makefile that are specific to HP-UX.
2615 PH/18 If the "use_postmaster" option was set for a recipient callout together
2616 with the "random" option, the postmaster address was used as the MAIL
2617 FROM address for the random test, but not for the subsequent recipient
2618 test. It is now used for both.
2620 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2621 patch removes a few documentation additions to RFC 3028, because the
2622 latest draft now contains them. It adds the new en;ascii-case comparator
2623 and a new error check for 8bit text in MIME parts. Comparator and
2624 require names are now matched exactly. I enabled the subaddress
2625 extension, but it is not well tested yet (read: it works for me)."
2627 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2628 rework some of the code of TK/09 above to avoid the hardwired use of
2629 "%lld" and "long long". Replaced the call to snprintf() with a call to
2632 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2633 records point to non-existent hosts", "retry timeout exceeded", and
2634 "retry time not reached for any host after a long failure period".
2636 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2637 experimental DomainKeys support:
2639 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2640 (2) On an error such as an illegally used "control", the wrong name for
2641 the control was given.
2643 These problems did NOT occur unless DomainKeys support was compiled.
2645 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2647 PH/24 Added ${if match_ip condition.
2649 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2650 databases so that it will be absolutely obvious if a crash occurs in the
2651 DB library. This is a regular occurrence (often caused by mis-matched
2654 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2655 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2656 picked up on a user's system that detects such things. There doesn't seem
2657 to be a gcc warning option for this - only an attribute that has to be
2658 put on the function's prototype. It seems that in Fedora Core 4 they have
2659 set this on a number of new functions. No doubt there will be more in due
2662 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2663 specify a transport. However, if an address that was verified by such a
2664 router was the subject of a callout, Exim crashed because it tried to
2665 read the rcpt_include_affixes from the non-existent transport. Now it
2666 just assumes that the setting of that option is false. This bug was
2667 introduced by 4.51/PH/31.
2669 PH/28 Changed -d+all to exclude +memory, because that information is very
2670 rarely of interest, but it makes the output a lot bigger. People tend to
2671 do -d+all out of habit.
2673 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2674 code in os-type was giving problems when libc.so lives in lib64, like on
2677 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2678 aren't the modern standard, and it seems that some systems' include files
2679 don't always have them. Exim was already checking for some of the newer
2680 ones like T_AAAA, and defining it itself. I've added checks for all the
2681 record types that Exim uses.
2683 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2684 not automatically generating a new one, as it is supposed to. This
2685 prevented TLS from working. If the file did exist, but contained invalid
2686 data, a new version was generated, as expected. It was only the case of a
2687 non-existent file that was broken.
2689 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2690 with a change in libdomainkeys > 0.64.
2692 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2693 from DNS. If the selector record carries the flag, it now has
2694 precedence over the domain-wide flag.
2696 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2698 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2699 the use of a port name that isn't defined in /etc/services) occurred, the
2700 message was deferred as in a normal delivery, and thus remained on the
2701 spool, instead of being failed because of the mua_wrapper setting. This
2702 is now fixed, and I tidied up some of the mua_wrapper messages at the
2705 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2706 the messages in a hash of arrays rather than using individual hashes.
2707 This is a bit cleaner and results in dramatic memory savings, albeit
2708 at a slight CPU cost.
2710 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2711 as requested by Marc Sherman.
2713 SC/10 Eximstats: added histograms for user specified patterns as requested
2716 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2718 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2719 fopen() in the content-scanning modules that did not already have it.
2725 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2726 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2728 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2730 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2732 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2733 to test Sieve filters that use "vacation".
2735 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2736 that changes the way the GnuTLS parameters are stored in the cache file.
2737 The new format can be generated externally. For backward compatibility,
2738 if the data in the cache doesn't make sense, Exim assumes it has read an
2739 old-format file, and it generates new data and writes a new file. This
2740 means that you can't go back to an older release without removing the
2743 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2744 work if there are any delivery delays because "one_time" forces the
2745 parent to be marked "delivered", so its unseen clone is never tried
2746 again. For this reason, Exim now forbids the simultaneous setting of
2749 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2750 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2751 entry if you want to know the details. The fix, however, neglected to
2752 consider the case when local delivery batching is involved. The test for
2753 "previously delivered" was not happening when checking to see if an
2754 address could be batched with a previous (undelivered) one; under
2755 certain circumstances this could lead to multiple deliveries to the same
2758 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2759 in its include files, and this causes problems building Exim.
2761 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2762 header_syntax) but Exim was just ignoring anything given after a slash.
2763 In particular, this caused confusion with an attempt to use "verify =
2764 reverse_host_lookup/defer_ok". An error is now given when options are
2765 supplied for verify items that do not have them. (Maybe reverse_host_
2766 lookup should have a defer_ok option, but that's a different point.)
2768 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2769 defined by RFC 821) to 2048, because there were problems with some AUTH
2770 commands, and RFC 1869 says the size should be increased for extended
2771 SMTP commands that take arguments.
2773 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2776 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2777 "unknown" error; now it says that the functionality isn't in the binary.
2779 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2780 an address' error message when a string expansion fails (syntax or
2781 whatever). Otherwise the password may appear in the log. Following change
2782 PH/42 below, there is no longer a chance of it appearing in a bounce
2785 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2787 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2788 of its addresses was ever tried. (Bugzilla bug #2.)
2790 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2791 the result incorrectly in the debug output. (It correctly added a newline
2792 to what was transported.)
2794 TF/01 Added $received_time.
2796 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2797 commented out examples of how to interface to a virus scanner and to
2798 SpamAssassin. Also added commented examples of av_scanner and
2799 spamd_address settings.
2801 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2802 and controls are allowed in which ACLs. There were a couple of minor
2803 errors. Some of the entries in the conditions table (which is a table of
2804 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2805 negation of where the condition IS allowed.
2807 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2809 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2810 header file does not have a version number, so I've had to invent a new
2811 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2812 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2813 radiusclient), but it was contributed by a Radius user.
2815 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2816 files or directories, for OpenSSL.
2818 PH/19 When an Exim process that is running as root has to create an Exim log
2819 file, it does so in a subprocess that runs as exim:exim so as to get the
2820 ownership right at creation (otherwise, other Exim processes might see
2821 the file with the wrong ownership). There was no test for failure of this
2822 fork() call, which would lead to the process getting stuck as it waited
2823 for a non-existent subprocess. Forks do occasionally fail when resources
2824 run out. I reviewed all the other calls to fork(); they all seem to check
2827 PH/20 When checking for unexpected SMTP input at connect time (before writing
2828 the banner), Exim was not dealing correctly with a non-positive return
2829 from the read() function. If the client had disconnected by this time,
2830 the result was a log entry for a synchronization error with an empty
2831 string after "input=" when read() returned zero. If read() returned -1
2832 (an event I could not check), uninitialized data bytes were printed.
2833 There were reports of junk text (parts of files, etc) appearing after
2836 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2838 PH/22 Added support for macro redefinition, and (re)definition in between
2839 driver and ACL definitions.
2841 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2842 forgetting to use the resulting value; it was using the unexpanded value.
2844 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2845 hadn't been configured. The fix is from Juergen Kreileder, who
2846 understands it better than I do:
2848 "Here's what I see happening with three configured cyrus_sasl
2849 authenticators configured (plain, login, cram-md5):
2851 On startup auth_cyrus_sasl_init() gets called for each of these.
2852 This means three calls to sasl_listmech() without a specified mech_list.
2853 => SASL tests which mechs of all available mechs actually work
2854 => three warnings about OTP not working
2855 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2857 With the patch, sasl_listmech() also gets called three times. But now
2858 SASL's mech_list option is set to the server_mech specified in the the
2859 authenticator. Or in other words, the answer from sasl_listmech()
2860 gets limited to just the mech you're testing for (which is different
2862 => the return list contains just 'plain' or 'login', 'cram-md5' or
2863 nothing depending on the value of ob->server_mech.
2865 I've just tested the patch: Authentication still works fine,
2866 unavailable mechs specified in the exim configuration are still
2867 caught, and the auth.log warnings about OTP are gone."
2869 PH/25 When debugging is enabled, the contents of the command line are added
2870 to the debugging output, even when log_selector=+arguments is not
2873 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2874 answer is "GNU", and only if the return is "GNU/something" is the answer
2877 PH/27 $acl_verify_message is now set immediately after the failure of a
2878 verification in an ACL, and so is available in subsequent modifiers. In
2879 particular, the message can be preserved by coding like this:
2881 warn !verify = sender
2882 set acl_m0 = $acl_verify_message
2884 Previously, $acl_verify_message was set only while expanding "message"
2885 and "log_message" when a very denied access.
2887 PH/28 Modified OS/os.c-Linux with
2889 -#ifndef OS_LOAD_AVERAGE
2890 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2892 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2893 nomenclature these days.)
2895 PH/29 Installed patch from the Sieve maintainer that adds the options
2896 sieve_useraddress and sieve_subaddress to the redirect router.
2898 PH/30 In these circumstances:
2899 . Two addresses routed to the same list of hosts;
2900 . First host does not offer TLS;
2901 . First host accepts first address;
2902 . First host gives temporary error to second address;
2903 . Second host offers TLS and a TLS session is established;
2904 . Second host accepts second address.
2905 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2906 and peerdn, if requested) that were in fact used only for the second
2909 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2910 attention to any local part prefix or suffix that was matched by the
2911 router that accepted the address. It now behaves in the same way as it
2912 does for delivery: the affixes are removed from the local part unless
2913 rcpt_include_affixes is set on the transport.
2915 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2916 timeout during the DATA phase of an incoming message.
2918 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2919 applied a patch sanctioned by the Sieve maintainer.
2921 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2922 the uid or gid is negative. A case of a negative gid caused this to be
2923 noticed. The fix allows for either to be negative.
2925 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2926 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2929 PH/36 The change PH/12 above was broken. Fixed it.
2931 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2932 the grounds that routing the same address twice would always produce the
2933 same answer. This might have been true once, but it is certainly no
2934 longer true now. Routing a child address may depend on the previous
2935 routing that produced that child. Some complicated redirection strategies
2936 went wrong when messages had multiple recipients, and made Exim's
2937 behaviour dependent on the order in which the addresses were given.
2939 I have moved the duplicate checking until after the routing is complete.
2940 Exim scans the addresses that are assigned to local and remote
2941 transports, and removes any duplicates. This means that more work will be
2942 done, as duplicates will always all be routed, but duplicates are
2943 presumably rare, so I don't expect this is of any significance.
2945 For deliveries to pipes, files, and autoreplies, the duplicate checking
2946 still happens during the routing process, since they are not going to be
2949 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2950 It corrects a timeout issue with spamd. This is Ian's comment: "The
2951 background is that sometimes spamd either never reads data from a
2952 connection it has accepted, or it never writes response data. The exiscan
2953 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2954 blindly assumes that writes won't block so it may never time out."
2956 PH/39 Allow G after quota size as well as K and M.
2958 PH/40 The value set for $authenticated_id in an authenticator may not contain
2959 binary zeroes or newlines because the value is written to log lines and
2960 to spool files. There was no check on this. Now the value is run through
2961 the string_printing() function so that such characters are converted to
2962 printable escape sequences.
2964 PH/41 $message_linecount is a new variable that contains the total number of
2965 lines in the message. Compare $body_linecount, which is the count for the
2968 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2969 bounce and delay warning messages, except in certain special cases, which
2972 (a) An SMTP error message from a remote host;
2973 (b) A message specified in a :fail: redirection;
2974 (c) A message specified in a "fail" command in a system filter;
2975 (d) A message specified in a FAIL return from the queryprogram router;
2976 (e) A message specified by the cannot_route_message router option.
2978 In these cases only, Exim does include the error details in bounce and
2979 warning messages. There are also a few cases where bland messages such
2980 as "unrouteable address" or "local delivery error" are given.
2982 PH/43 $value is now also set for the "else" part of a ${run expansion.
2984 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2985 being worked on, but at least Exim now implements the latest version to
2988 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2989 process to complete was treated as a delivery failure, a timeout while
2990 writing the message to the pipe was logged, but erroneously treated as a
2991 successful delivery. Such timeouts include transport filter timeouts. For
2992 consistency with the overall process timeout, these timeouts are now
2993 treated as errors, giving rise to delivery failures by default. However,
2994 there is now a new Boolean option for the pipe transport called
2995 timeout_defer, which, if set TRUE, converts the failures into defers for
2996 both kinds of timeout. A transport filter timeout is now identified in
2999 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3000 systems where "make" and "gmake" are different, calling "gmake" at top
3001 level broke things. I've arranged for the value of $(MAKE) to be passed
3002 from the Makefile to this script so that it can call the same version of
3006 A note about Exim versions 4.44 and 4.50
3007 ----------------------------------------
3009 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3010 changes of various kinds. As a consequence, a big documentation update was
3011 needed. This delayed the release for rather longer than seemed good, especially
3012 in the light of a couple of (minor) security issues. Therefore, the changes
3013 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3014 release. So 4.44 and 4.50 are in effect two different branches that both start
3017 I have left the 4.50 change log unchanged; it contains all the changes since
3018 4.43. The change log for 4.44 is below; many of its items are identical to
3019 those for 4.50. This seems to be the most sensible way to preserve the
3020 historical information.
3026 1. Minor wording change to the doc/README.SIEVE file.
3028 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3029 computation of the current number of files was incorrect.
3031 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3032 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3035 4. Give more explanation in the error message when the command for a transport
3036 filter fails to execute.
3038 5. There are several places where Exim runs a non-Exim command in a
3039 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3040 was being done only for the command run by the queryprogram router. It is
3041 now done for all such subprocesses. The other cases are: ${run, transport
3042 filters, and the commands run by the lmtp and pipe transports.
3044 6. Added CONFIGURE_GROUP build-time option.
3046 7. Some older OS have a limit of 256 on the maximum number of file
3047 descriptors. Exim was using setrlimit() to set 1000 as a large value
3048 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3049 systems. I've change it so that if it can't get 1000, it tries for 256.
3051 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3052 was an oversight, and furthermore, ever since the addition of extra
3053 controls (e.g. 4.43/32), the checks on when to allow different forms of
3054 "control" were broken. There should now be diagnostics for all cases when a
3055 control that does not make sense is encountered.
3057 9. Added the /retain_sender option to "control=submission".
3059 10. $recipients is now available in the predata ACL (oversight).
3061 11. Tidy the search cache before the fork to do a delivery from a message
3062 received from the command line. Otherwise the child will trigger a lookup
3063 failure and thereby defer the delivery if it tries to use (for example) a
3064 cached ldap connection that the parent has called unbind on.
3066 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3067 of $address_data from the recipient verification was clobbered by the
3068 sender verification.
3070 13. The value of address_data from a sender verification is now available in
3071 $sender_address_data in subsequent conditions in the ACL statement.
3073 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3075 15. Added a new option "connect=<time>" to callout options, to set a different
3078 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3079 was its contents. (It was OK if the option was not defined at all.)
3081 17. A "Completed" log line is now written for messages that are removed from
3082 the spool by the -Mrm option.
3084 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3085 information about exactly what failed.
3087 19. Added -dd to debug only the daemon process.
3089 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3090 handles timeouts, both on the server side and network timeouts. Renamed the
3091 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3093 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3094 It is now set to "smtps".
3096 22. $host_address is now set to the target address during the checking of
3097 ignore_target_hosts.
3099 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3100 being passed; this would have caused $sender_host_name to have been used if
3101 matching the list had actually called for a host name (not very likely,
3102 since this list is usually IP addresses). A host name is now passed as
3105 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3106 code that specifies a non-restarting handler (typically sigaction() in
3107 modern systems) in an attempt to fix a rare and obscure crash bug.
3109 25. Narrowed the window for a race in the daemon that could cause it to ignore
3110 SIGCHLD signals. This is not a major problem, because they are used only to
3111 wake it up if nothing else does.
3113 26. A malformed maildirsize file could cause Exim to calculate negative values
3114 for the mailbox size or file count. Odd effects could occur as a result.
3115 The maildirsize information is now recalculated if the size or filecount
3118 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3119 support for a long time. Removed HAVE_SYS_VFS_H.
3121 28. Installed the latest version of exipick from John Jetmore.
3123 29. In an address list, if the pattern was not a regular expression, an empty
3124 subject address (from a bounce message) matched only if the pattern was an
3125 empty string. Non-empty patterns were not even tested. This was the wrong
3126 because it is perfectly reasonable to use an empty address as part of a
3127 database query. An empty address is now tested by patterns that are
3128 lookups. However, all the other forms of pattern expect the subject to
3129 contain a local part and a domain, and therefore, for them, an empty
3130 address still always fails if the pattern is not itself empty.
3132 30. Exim went into a mad DNS loop when attempting to do a callout where the
3133 host was specified on an smtp transport, and looking it up yielded more
3134 than one IP address.
3136 31. Re-factored the code for checking spool and log partition space into a
3137 function that finds that data and another that does the check. The former
3138 is then used to implement four new variables: $spool_space, $log_space,
3139 $spool_inodes, and $log_inodes.
3141 32. The RFC2047 encoding function was originally intended for short strings
3142 such as real names; it was not keeping to the 75-character limit for
3143 encoded words that the RFC imposes. It now respects the limit, and
3144 generates multiple encoded words if necessary. To be on the safe side, I
3145 have increased the buffer size for the ${rfc2047: expansion operator from
3148 33. It is now permitted to omit both strings after an "if" condition; if the
3149 condition is true, the result is "true". As before, when the second string
3150 is omitted, a false condition yields an empty string. This makes it less
3151 cumbersome to write custom ACL and router conditions.
3153 34. Failure to deliver a bounce message always caused it to be frozen, even if
3154 there was an errors_to setting on the router. The errors_to setting is now
3157 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3158 canonical form (fully expanded) before being placed in
3159 $sender_host_address.
3161 36. The table in the code that translates DNS record types into text (T_A to
3162 "A" for instance) was missing entries for NS and CNAME. It is just possible
3163 that this could have caused confusion if both these types were looked up
3164 for the same domain, because the text type is used as part of Exim's
3165 per-process caching. But the chance of anyone hitting this buglet seems
3168 37. The dnsdb lookup has been extended in a number of ways.
3170 (1) There is a new type, "zns", which walks up the domain tree until it
3171 finds some nameserver records. It should be used with care.
3173 (2) There is a new type, "mxh", which is like "mx" except that it returns
3174 just the host names, not the priorities.
3176 (3) It is now possible to give a list of domains (or IP addresses) to be
3177 looked up. The behaviour when one of the lookups defers can be
3178 controlled by a keyword.
3180 (4) It is now possible to specify the separator character for use when
3181 multiple records are returned.
3183 38. The dnslists ACL condition has been extended: it is now possible to supply
3184 a list of IP addresses and/or domains to be looked up in a particular DNS
3187 39. Added log_selector=+queue_time_overall.
3189 40. When running the queue in the test harness, wait just a tad after forking a
3190 delivery process, to get repeatability of debugging output.
3192 41. Include certificate and key file names in error message when GnuTLS fails
3193 to set them up, because the GnuTLS error message doesn't include the name
3194 of the failing file when there is a problem reading it.
3196 42. Allow both -bf and -bF in the same test run.
3198 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3200 44. The "Exiscan patch" is now merged into the mainline Exim source.
3202 45. Sometimes the final signoff response after QUIT could fail to get
3203 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3204 < 0 before doing a fflush(). This bug looks as though it goes back to the
3205 introduction of TLS in release 3.20, but "sometimes" must have been rare
3206 because the tests only now provoked it.
3208 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3209 (this can affect the format of dates).
3211 47. exim_tidydb, when checking for the continued existence of a message for
3212 which it has found a message-specific retry record, was not finding
3213 messages that were in split spool directories. Consequently, it was
3214 deleting retry records that should have stayed in existence.
3216 48. Steve fixed some bugs in eximstats.
3218 49. The SPA authentication driver was not abandoning authentication and moving
3219 on to the next authenticator when an expansion was forced to fail,
3220 contradicting the general specification for all authenticators. Instead it
3221 was generating a temporary error. It now behaves as specified.
3223 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3224 (the order specifies the preference for clients). The order is now AES256,
3225 AES128, 3DES, ARCFOUR128.
3227 51. Small patch to Sieve code - explicitly set From: when generating an
3230 52. Exim crashed if a remote delivery caused a very long error message to be
3231 recorded - for instance if somebody sent an entire SpamAssassin report back
3232 as a large number of 550 error lines. This bug was coincidentally fixed by
3233 increasing the size of one of Exim's internal buffers (big_buffer) that
3234 happened as part of the Exiscan merge. However, to be on the safe side, I
3235 have made the code more robust (and fixed the comments that describe what
3238 53. Now that there can be additional text after "Completed" in log lines (if
3239 the queue_time_overall log selector is set), a one-byte patch to exigrep
3240 was needed to allow it to recognize "Completed" as not the last thing in
3243 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3244 patch that reportedly fixes this has been added. I am not expert enough to
3245 create a test for it. This is what the patch creator wrote:
3247 "I found a little strange behaviour of ldap code when working with
3248 Windows 2003 AD Domain, where users was placed in more than one
3249 Organization Units. When I tried to give exim partial DN, the exit code
3250 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3251 But simultaneously result of request was absolutely normal ldap result,
3252 so I produce this patch..."
3254 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3255 REFERENCE, so I have modified the code to exclude the patch when that macro
3258 55. Some experimental protocols are using DNS PTR records for new purposes. The
3259 keys for these records are domain names, not reversed IP addresses. The
3260 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3261 leaves it alone. Component reversal etc. now happens only for IP addresses.
3264 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3266 57. Double the size of the debug message buffer (to 2048) so that more of very
3267 long debug lines gets shown.
3269 58. The exicyclog utility now does better if the number of log files to keep
3270 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3272 59. Two changes related to the smtp_active_hostname option:
3274 (1) $smtp_active_hostname is now available as a variable.
3275 (2) The default for smtp_banner uses $smtp_active_hostname instead
3276 of $primary_hostname.
3278 60. The host_aton() function is supposed to be passed a string that is known
3279 to be a valid IP address. However, in the case of IPv6 addresses, it was
3280 not checking this. This is a hostage to fortune. Exim now panics and dies
3281 if the condition is not met. A case was found where this could be provoked
3282 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3283 components; fortuitously, this particular loophole had already been fixed
3284 by change 4.50/55 above.
3286 If there are any other similar loopholes, the new check in host_aton()
3287 itself should stop them being exploited. The report I received stated that
3288 data on the command line could provoke the exploit when Exim was running as
3289 exim, but did not say which command line option was involved. All I could
3290 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3291 running as the user.
3294 61. There was a buffer overflow vulnerability in the SPA authentication code
3295 (which came originally from the Samba project). I have added a test to the
3296 spa_base64_to_bits() function which I hope fixes it.
3299 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3300 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3302 63. The daemon start-up calls getloadavg() while still root for those OS that
3303 need the first call to be done as root, but it missed one case: when
3304 deliver_queue_load_max is set with deliver_drop_privilege. This is
3305 necessary for the benefit of the queue runner, because there is no re-exec
3306 when deliver_drop_privilege is set.
3308 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3309 This has been fixed.
3311 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3312 was in use, was not putting the data itself into the right store pool;
3313 consequently, it could be overwritten for a subsequent message in the same
3314 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3317 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3319 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3320 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3321 the function were treating the return as a boolean value, which happened to
3322 work because 0=false and not-0=true, but is not correct code.
3324 68. The host_aton() function was not handling scoped IPv6 addresses (those
3325 with, for example, "%eth0" on the end) correctly.
3327 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3328 negated items (that is, ~something) in unsigned ints. Some compilers
3329 apparently mutter when there is no cast.
3331 70. If an address verification called from an ACL failed, and did not produce a
3332 user-specific message (i.e. there was only a "system" message), nothing was
3333 put in $acl_verify_message. In this situation, it now puts the system
3336 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3337 session; change 4.31/43 added the unwanted input to the log line - except
3338 that it did not do this in the start of session case. It now does.
3340 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3341 This is wrong and can cause the other end to generate a synchronization
3342 error if it is another Exim or anything else that does the synchronization
3343 check. A QUIT command is no longer sent after a timeout.
3345 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3346 during host lookups.
3348 74. The defer_ok option of callout verification was not working if it was used
3349 when verifying addresses in header lines, that is, for this case:
3351 verify = header_sender/callout=defer_ok
3353 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3354 those file descriptors could be used for SMTP connections. If anything
3355 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3356 could be sent to the SMTP client, causing chaos. The daemon now opens
3357 stdin, stdout, and stderr to /dev/null when it puts itself into the
3360 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3361 log by default. The user can override this with suitable Perl magic.
3363 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3364 the log message when discard triggers, was not working for the DATA ACL or
3365 for the non-SMTP ACL.
3367 78. Error message wording change in sieve.c.
3369 79. If smtp_accept_max_per_host was set, the number of connections could be
3370 restricted to fewer than expected, because the daemon was trying to set up
3371 a new connection before checking whether the processes handling previous
3372 connections had finished. The check for completed processes is now done
3373 earlier. On busy systems, this bug wouldn't be noticed because something
3374 else would have woken the daemon, and it would have reaped the completed
3377 80. If a message was submitted locally by a user whose login name contained one
3378 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3379 It caused a spool format error. I have fixed the spool reading code. A
3380 related problem was that the "from" clause in the Received: line became
3381 illegal because of the space(s). It is now covered by ${quote_local_part.
3383 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3386 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3388 83. Patch from Sieve maintainer to fix unterminated string problem in
3389 "vacation" handling.
3391 84. Some minor changes to the Linux configuration files to help with other
3392 OS variants using glibc.
3394 85. One more patch for Sieve to update vacation handling to latest spec.
3397 ----------------------------------------------------
3398 See the note above about the 4.44 and 4.50 releases.
3399 ----------------------------------------------------
3405 1. Change 4.43/35 introduced a bug that caused file counts to be
3406 incorrectly computed when quota_filecount was set in an appendfile
3409 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3410 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3413 3. Give more explanation in the error message when the command for a transport
3414 filter fails to execute.
3416 4. There are several places where Exim runs a non-Exim command in a
3417 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3418 was being done only for the command run by the queryprogram router. It is
3419 now done for all such subprocesses. The other cases are: ${run, transport
3420 filters, and the commands run by the lmtp and pipe transports.
3422 5. Some older OS have a limit of 256 on the maximum number of file
3423 descriptors. Exim was using setrlimit() to set 1000 as a large value
3424 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3425 systems. I've change it so that if it can't get 1000, it tries for 256.
3427 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3428 was an oversight, and furthermore, ever since the addition of extra
3429 controls (e.g. 4.43/32), the checks on when to allow different forms of
3430 "control" were broken. There should now be diagnostics for all cases when a
3431 control that does not make sense is encountered.
3433 7. $recipients is now available in the predata ACL (oversight).
3435 8. Tidy the search cache before the fork to do a delivery from a message
3436 received from the command line. Otherwise the child will trigger a lookup
3437 failure and thereby defer the delivery if it tries to use (for example) a
3438 cached ldap connection that the parent has called unbind on.
3440 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3441 of $address_data from the recipient verification was clobbered by the
3442 sender verification.
3444 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3445 was its contents. (It was OK if the option was not defined at all.)
3447 11. A "Completed" log line is now written for messages that are removed from
3448 the spool by the -Mrm option.
3450 12. $host_address is now set to the target address during the checking of
3451 ignore_target_hosts.
3453 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3454 being passed; this would have caused $sender_host_name to have been used if
3455 matching the list had actually called for a host name (not very likely,
3456 since this list is usually IP addresses). A host name is now passed as
3459 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3460 code that specifies a non-restarting handler (typically sigaction() in
3461 modern systems) in an attempt to fix a rare and obscure crash bug.
3463 15. Narrowed the window for a race in the daemon that could cause it to ignore
3464 SIGCHLD signals. This is not a major problem, because they are used only to
3465 wake it up if nothing else does.
3467 16. A malformed maildirsize file could cause Exim to calculate negative values
3468 for the mailbox size or file count. Odd effects could occur as a result.
3469 The maildirsize information is now recalculated if the size or filecount
3472 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3473 support for a long time. Removed HAVE_SYS_VFS_H.
3475 18. Updated exipick to current release from John Jetmore.
3477 19. Allow an empty sender to be matched against a lookup in an address list.
3478 Previously the only cases considered were a regular expression, or an
3481 20. Exim went into a mad DNS lookup loop when doing a callout where the
3482 host was specified on the transport, if the DNS lookup yielded more than
3485 21. The RFC2047 encoding function was originally intended for short strings
3486 such as real names; it was not keeping to the 75-character limit for
3487 encoded words that the RFC imposes. It now respects the limit, and
3488 generates multiple encoded words if necessary. To be on the safe side, I
3489 have increased the buffer size for the ${rfc2047: expansion operator from
3492 22. Failure to deliver a bounce message always caused it to be frozen, even if
3493 there was an errors_to setting on the router. The errors_to setting is now
3496 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3497 canonical form (fully expanded) before being placed in
3498 $sender_host_address.
3500 24. Updated eximstats to version 1.33
3502 25. Include certificate and key file names in error message when GnuTLS fails
3503 to set them up, because the GnuTLS error message doesn't include the name
3504 of the failing file when there is a problem reading it.
3506 26. Expand error message when OpenSSL has problems setting up cert/key files.
3509 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3510 (this can affect the format of dates).
3512 28. exim_tidydb, when checking for the continued existence of a message for
3513 which it has found a message-specific retry record, was not finding
3514 messages that were in split spool directories. Consequently, it was
3515 deleting retry records that should have stayed in existence.
3517 29. eximstats updated to version 1.35
3518 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3519 1.35 - bugfix such that pie charts by volume are generated correctly
3521 30. The SPA authentication driver was not abandoning authentication and moving
3522 on to the next authenticator when an expansion was forced to fail,
3523 contradicting the general specification for all authenticators. Instead it
3524 was generating a temporary error. It now behaves as specified.
3526 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3527 (the order specifies the preference for clients). The order is now AES256,
3528 AES128, 3DES, ARCFOUR128.
3530 31. Small patch to Sieve code - explicitly set From: when generating an
3533 32. Exim crashed if a remote delivery caused a very long error message to be
3534 recorded - for instance if somebody sent an entire SpamAssassin report back
3535 as a large number of 550 error lines. This bug was coincidentally fixed by
3536 increasing the size of one of Exim's internal buffers (big_buffer) that
3537 happened as part of the Exiscan merge. However, to be on the safe side, I
3538 have made the code more robust (and fixed the comments that describe what
3541 33. Some experimental protocols are using DNS PTR records for new purposes. The
3542 keys for these records are domain names, not reversed IP addresses. The
3543 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3544 leaves it alone. Component reversal etc. now happens only for IP addresses.
3547 34. The host_aton() function is supposed to be passed a string that is known
3548 to be a valid IP address. However, in the case of IPv6 addresses, it was
3549 not checking this. This is a hostage to fortune. Exim now panics and dies
3550 if the condition is not met. A case was found where this could be provoked
3551 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3552 components; fortuitously, this particular loophole had already been fixed
3553 by change 4.50/55 or 4.44/33 above.
3555 If there are any other similar loopholes, the new check in host_aton()
3556 itself should stop them being exploited. The report I received stated that
3557 data on the command line could provoke the exploit when Exim was running as
3558 exim, but did not say which command line option was involved. All I could
3559 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3560 running as the user.
3563 35. There was a buffer overflow vulnerability in the SPA authentication code
3564 (which came originally from the Samba project). I have added a test to the
3565 spa_base64_to_bits() function which I hope fixes it.
3568 36. The daemon start-up calls getloadavg() while still root for those OS that
3569 need the first call to be done as root, but it missed one case: when
3570 deliver_queue_load_max is set with deliver_drop_privilege. This is
3571 necessary for the benefit of the queue runner, because there is no re-exec
3572 when deliver_drop_privilege is set.
3574 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3575 was in use, was not putting the data itself into the right store pool;
3576 consequently, it could be overwritten for a subsequent message in the same
3577 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3580 38. Sometimes the final signoff response after QUIT could fail to get
3581 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3582 < 0 before doing a fflush(). This bug looks as though it goes back to the
3583 introduction of TLS in release 3.20, but "sometimes" must have been rare
3584 because the tests only now provoked it.
3590 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3591 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3592 Now it returns an integer. A number of calls were still expecting a T/F
3593 return. Fortuitously, in all cases, the tests worked in OK situations,
3594 which is the norm. However, things would have gone wrong on any write
3595 failures on the smtp file descriptor. This function is used when sending
3596 messages over SMTP and also when doing verify callouts.
3598 2. When Exim is called to do synchronous delivery of a locally submitted
3599 message (the -odf or -odi options), it no longer closes stderr before doing
3602 3. Implemented the mua_wrapper option.
3604 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3606 5. Implemented the functions header_remove(), header_testname(),
3607 header_add_at_position(), and receive_remove_recipient(), and exported them
3610 6. If an ACL "warn" statement specified the addition of headers, Exim already
3611 inserted X-ACL-Warn: at the start if there was no header name. However, it
3612 was not making this test for the second and subsequent header lines if
3613 there were newlines in the string. This meant that an invalid header could
3614 be inserted if Exim was badly configured.
3616 7. Allow an ACL "warn" statement to add header lines at the start or after all
3617 the Received: headers, as well as at the end.
3619 8. Added the rcpt_4xx retry error code.
3621 9. Added postmaster_mailfrom=xxx to callout verification option.
3623 10. Added mailfrom=xxxx to the callout verification option, for verify=
3626 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3627 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3629 12. Inserted some casts to stop certain compilers warning when using pointer
3630 differences as field lengths or precisions in printf-type calls (mostly
3631 affecting debugging statements).
3633 13. Added optional readline() support for -be (dynamically loaded).
3635 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3636 same clock tick as a message's arrival, so that its received time was the
3637 same as the "first fail" time on the retry record, and that message
3638 remained on the queue past the ultimate address timeout, every queue runner
3639 would try a delivery (because it was past the ultimate address timeout) but
3640 after another failure, the ultimate address timeout, which should have then
3641 bounced the address, did not kick in. This was a "< instead of <=" error;
3642 in most cases the first failure would have been in the next clock tick
3643 after the received time, and all would be well.
3645 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3646 being recognized when the domain list was tested by the match_domain
3647 condition in an expansion string.
3649 16. Added the ${str2b64: operator.
3651 17. Exim was always calling setrlimit() to set a large limit for the number of
3652 processes, without checking whether the existing limit was already
3653 adequate. (It did check for the limit on file descriptors.) Furthermore,
3654 errors from getrlimit() and setrlimit() were being ignored. Now they are
3655 logged to the main and panic logs, but Exim does carry on, to try to do its
3656 job under whatever limits there are.
3658 18. Imported PCRE 5.0.
3660 19. Trivial typo in log message " temporarily refused connection" (the leading
3663 20. If the log selector return_path_on_delivery was set and an address was
3664 redirected to /dev/null, the delivery process crashed because it assumed
3665 that a return path would always be set for a "successful" delivery. In this
3666 case, the whole delivery is bypassed as an optimization, and therefore no
3669 21. Internal re-arrangement: the function for sending a challenge and reading
3670 a response while authentication was assuming a zero-terminated challenge
3671 string. It's now changed to take a pointer and a length, to allow for
3672 binary data in such strings.
3674 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3676 23. Exim was not respecting finduser_retries when seeking the login of the
3677 uid under which it was called; it was always trying 10 times. (The default
3678 setting of finduser_retries is zero.) Also, it was sleeping after the final
3679 failure, which is pointless.
3681 24. Implemented tls_on_connect_ports.
3683 25. Implemented acl_smtp_predata.
3685 26. If the domain in control=submission is set empty, Exim assumes that the
3686 authenticated id is a complete email address when it generates From: or
3687 Sender: header lines.
3689 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3690 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3691 chown and chgrp in /bin and hostname in /usr/bin.
3693 28. Exim was keeping the "process log" file open after each use, just as it
3694 does for the main log. This opens the possibility of it remaining open for
3695 long periods when the USR1 signal hits a daemon. Occasional processlog
3696 errors were reported, that could have been caused by this. Anyway, it seems
3697 much more sensible not to leave this file open at all, so that is what now
3700 29. The long-running daemon process does not normally write to the log once it
3701 has entered its main loop, and it closes the log before doing so. This is
3702 so that log files can straightforwardly be renamed and moved. However,
3703 there are a couple of unusual error situations where the daemon does write
3704 log entries, and I had neglected to close the log afterwards.
3706 30. The text of an SMTP error response that was received during a remote
3707 delivery was being truncated at 512 bytes. This is too short for some of
3708 the long messages that one sometimes sees. I've increased the limit to
3711 31. It is now possible to make retry rules that apply only when a message has a
3712 specific sender, in particular, an empty sender.
3714 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3715 it possible to be selective about when SMTP synchronization is enforced.
3717 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3719 32. Implemented hosts_connection_nolog.
3721 33. Added an ACL for QUIT.
3723 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3726 35. Added mailbox_size and mailbox_filecount to appendfile.
3728 36. Added control = no_multiline_responses to ACLs.
3730 37. There was a bug in the logic of the code that waits for the clock to tick
3731 in the case where the clock went backwards by a substantial amount such
3732 that the microsecond fraction of "now" was more than the microsecond
3733 fraction of "then" (but the whole seconds number was less).
3735 38. Added support for the libradius Radius client library this is found on
3736 FreeBSD (previously only the radiusclient library was supported).
3742 1. When certain lookups returned multiple values in the form name=value, the
3743 quoting of the values was not always being done properly. Specifically:
3744 (a) If the value started with a double quote, but contained no whitespace,
3746 (b) If the value contained whitespace other than a space character (i.e.
3747 tabs or newlines or carriage returns) it was not quoted.
3748 This fix has been applied to the mysql and pgsql lookups by writing a
3749 separate quoting function and calling it from the lookup code. The fix
3750 should probably also be applied to nisplus, ibase and oracle lookups, but
3751 since I cannot test any of those, I have not disturbed their existing code.
3753 2. A hit in the callout cache for a specific address caused a log line with no
3754 reason for rejecting RCPT. Now it says "Previous (cached) callout
3755 verification failure".
3757 3. There was an off-by-one bug in the queryprogram router. An over-long
3758 return line was truncated at 256 instead of 255 characters, thereby
3759 overflowing its buffer with the terminating zero. As well as fixing this, I
3760 have increased the buffer size to 1024 (and made a note to document this).
3762 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3763 when Exim is waiting for an SMTP response from a remote server, Exim
3764 restarts its select() call on the socket, thereby resetting its timeout.
3765 This is not a problem when such interrupts are rare. Somebody set up a cron
3766 job to run exiwhat every 2 minutes, which is less than the normal select()
3767 timeout (5 or 10 minutes). This meant that the select() timeout never
3768 kicked in because it was always reset. I have fixed this by comparing the
3769 time when an interrupt arrives with the time at the start of the first call
3770 to select(). If more time than the timeout has elapsed, the interrupt is
3771 treated as a timeout.
3773 5. Some internal re-factoring in preparation for the addition of Sieve
3774 extensions (by MH). In particular, the "personal" test is moved to a
3775 separate function, and given an option for scanning Cc: and Bcc: (which is
3776 not set for Exim filters).
3778 6. When Exim created an email address using the login of the caller as the
3779 local part (e.g. when creating a From: or Sender: header line), it was not
3780 quoting the local part when it contained special characters such as @.
3782 7. Installed new OpenBSD configuration files.
3784 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3785 try to make them clearer.
3787 9. Callout options, other than the timeout value, were being ignored when
3788 verifying sender addresses in header lines. For example, when using
3790 verify = header_sender/callout=no_cache
3792 the cache was (incorrectly) being used.
3794 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3795 only the Cygwin environment.
3797 11. When return_path_on_delivery was set as a log selector, if different remote
3798 addresses in the same message used different return paths and parallel
3799 remote delivery occurred, the wrong values would sometimes be logged.
3800 (Whenever a remote delivery process finished, the return path value from
3801 the most recently started remote delivery process was logged.)
3803 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3804 lines when AUTH and/or TLS are in use. This is the "received protocol"
3805 field. Exim used to use "asmtp" for authenticated SMTP, without any
3806 indication (in the protocol name) for TLS use. Now it follows the RFC and
3807 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3808 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3809 names appear in log lines as well as in Received: header lines.
3811 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3812 extensions, and comparison tests, and to fix some bugs.
3814 14. Changes to the "personal" filter test:
3816 (1) The test was buggy in that it was just doing the equivalent of
3817 "contains" tests on header lines. For example, if a user's address was
3818 anne@some.where, the "personal" test would incorrectly be true for
3820 To: susanne@some.where
3822 This test is now done by extracting each address from the header in turn,
3823 and checking the entire address. Other tests that are part of "personal"
3824 are now done using regular expressions (for example, to check local parts
3825 of addresses in From: header lines).
3827 (2) The list of non-personal local parts in From: addresses has been
3828 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3829 taken from the Sieve specification recommendations.
3831 (3) If the message contains any header line starting with "List-" it is
3832 treated as non-personal.
3834 (4) The test for "circular" in the Subject: header line has been removed
3835 because it now seems ill-conceived.
3837 15. Minor typos in src/EDITME comments corrected.
3839 16. Installed latest exipick from John Jetmore.
3841 17. If headers_add on a router specified a text string that was too long for
3842 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3843 of string_sprintf() is now avoided.
3845 18. $message_body_size was not set (it was always zero) when running the DATA
3846 ACL and the local_scan() function.
3848 19. For the "mail" command in an Exim filter, no default was being set for
3849 the once_repeat time, causing a random time value to be used if "once" was
3850 specified. (If the value happened to be <= 0, no repeat happened.) The
3851 default is now 0s, meaning "never repeat". The "vacation" command was OK
3852 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3853 (I found it when inspecting the code).
3855 20. There is now an overall timeout for performing a callout verification. It
3856 defaults to 4 times the callout timeout, which applies to individual SMTP
3857 commands during the callout. The overall timeout applies when there is more
3858 than one host that can be tried. The timeout is checked before trying the
3859 next host. This prevents very long delays if there are a large number of
3860 hosts and all are timing out (e.g. when the network connections are timing
3861 out). The value of the overall timeout can be changed by specifying an
3862 additional sub-option for "callout", called "maxwait". For example:
3864 verify = sender/callout=5s,maxwait=20s
3866 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3867 to the end before writing, but this should make it even safer).
3869 22. Exim was forgetting that it had advertised PIPELINING for the second and
3870 subsequent messages on an SMTP connection. It was also not resetting its
3871 memory on STARTTLS and an internal HELO.
3873 23. When Exim logs an SMTP synchronization error within a session, it now
3874 records whether PIPELINING has been advertised or not.
3876 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3877 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3878 rather than long int.
3880 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3882 26. Added the never_mail option to autoreply.
3888 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3889 crash if the getsockname() call failed; this can happen if a connection is
3890 closed very soon after it is established. The problem was simply in the
3891 order in which certain operations were done, causing Exim to try to write
3892 to the SMTP stream before it had set up the file descriptor. The bug has
3893 been fixed by making things happen in the correct order.
3899 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3900 before the connection was closed, thus losing the rejection response.
3902 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3903 some early Solaris releases, but causes trouble in current releases where
3904 socklen_t is defined.
3906 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3909 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3912 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3913 that releasing the top of it at the end releases what was used for sub-
3914 expansions (unless the block got too big). However, discard this block if
3915 the first thing is a variable or header, so that we can use its block when
3916 it is dynamic (useful for very large $message_headers, for example).
3918 6. Lookups now cache *every* query, not just the most recent. A new, separate
3919 store pool is used for this. It can be recovered when all lookup caches are
3920 flushed. Lookups now release memory at the end of their result strings.
3921 This has involved some general refactoring of the lookup sources.
3923 7. Some code has been added to the store_xxx() functions to reduce the amount
3924 of flapping under certain conditions.
3926 8. log_incoming_interface used to affect only the <= reception log lines. Now
3927 it causes the local interface and port to be added to several more SMTP log
3928 lines, for example "SMTP connection from", and rejection lines.
3930 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3932 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3934 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3935 could be overwritten at the end of the current message (or the start of a
3936 new message if it was set in a HELO ACL). The value is now preserved for
3937 the duration of the SMTP connection.
3939 12. If a transport had a headers_rewrite setting, and a matching header line
3940 contained an unqualified address, that address was qualified, even if it
3941 did not match any rewriting rules. The underlying bug was that the values
3942 of the flags that permit the existence of unqualified sender and recipient
3943 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3944 non-local messages, and by -bnq for local messages) were not being
3945 preserved with the message after it was received.
3947 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3948 "next input=" as part of the text comprising the host identity instead of
3949 the correct text. The code was using the same buffer for two different
3950 strings. However, depending on which order the printing function evaluated
3951 its arguments, the bug did not always show up. Under Linux, for example, my
3952 test suite worked just fine.
3954 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3955 doesn't work with some older versions of Perl. It has been changed to "my",
3956 which in any case is probably the better facility to use.
3958 15. A really picky compiler found some instances of statements for creating
3959 error messages that either had too many or two few arguments for the format
3962 16. The size of the buffer for calls to the DNS resolver has been increased
3963 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3964 for addresses that have a lot of PTR records. This alleviates a problem; it
3965 does not fully solve it.
3967 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3968 buffer now truncates the list and logs the incident, which is the same
3969 action as happens when Exim is looking up a host name and its aliases.
3970 Previously in this situation something unpredictable would happen;
3971 sometimes it was "internal error: store_reset failed".
3973 18. If a server dropped the connection unexpectedly when an Exim client was
3974 using GnuTLS and trying to read a response, the client delivery process
3975 crashed while trying to generate an error log message.
3977 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3978 string, for example:
3980 warn message = H1: something\nH2: something
3982 the text was added as a single header line from Exim's point of view
3983 though it ended up OK in the delivered message. However, searching for the
3984 second and subsequent header lines using $h_h2: did not work. This has been
3985 fixed. Similarly, if a system filter added multiple headers in this way,
3986 the routers could not see them.
3988 20. Expanded the error message when iplsearch is called with an invalid key to
3989 suggest using net-iplsearch in a host list.
3991 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3992 ACLs are no longer actually imposed (and a message to that effect is
3995 22. If a "gecos" field in a passwd entry contained escaped characters, in
3996 particular, if it contained a \" sequence, Exim got it wrong when building
3997 a From: or a Sender: header from that name. A second bug also caused
3998 incorrect handling when an unquoted " was present following a character
3999 that needed quoting.
4001 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4002 was not being matched caselessly.
4004 24. Arranged for all hyphens in the exim.8 source to be escaped with
4007 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4008 properly. Recipient callout cache records were still being keyed to include
4009 the sender, even when use_sender was set false. This led to far more
4010 callouts that were necessary. The sender is no longer included in the key
4011 when use_sender is false.
4013 26. Added "control = submission" modifier to ACLs.
4015 27. Added the ${base62d: operator to decode base 62 numbers.
4017 28. dnsdb lookups can now access SRV records.
4019 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4020 the configuration file.
4022 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4023 (-v) mode. This makes the output for a verbose queue run more intelligible.
4025 31. Added a use_postmaster feature to recipient callouts.
4027 32. Added the $body_zerocount variable, containing the number of binary zero
4028 bytes in the message body.
4030 33. The time of last modification of the "new" subdirectory is now used as the
4031 "mailbox time last read" when there is a quota error for a maildir
4034 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4036 35. Added +ignore_unknown as a special item in host lists.
4038 36. Code for decoding IPv6 addresses in host lists is now included, even if
4039 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4040 address was recognized as an IP address, but was then not correctly decoded
4041 into binary, causing unexpected and incorrect effects when compared with
4048 1. Very minor rewording of debugging text in manualroute to say "list of
4049 hosts" instead of "hostlist".
4051 2. If verify=header_syntax was set, and a header line with an unqualified
4052 address (no domain) and a large number of spaces between the end of the
4053 name and the colon was received, the reception process suffered a buffer
4054 overflow, and (when I tested it) crashed. This was caused by some obsolete
4055 code that should have been removed. The fix is to remove it!
4057 3. When running in the test harness, delay a bit after writing a bounce
4058 message to get a bit more predictability in the log output.
4060 4. Added a call to search_tidyup() just before forking a reception process. In
4061 theory, someone could use a lookup in the expansion of smtp_accept_max_
4062 per_host which, without the tidyup, could leave open a database connection.
4064 5. Added the variables $recipient_data and $sender_data which get set from a
4065 lookup success in an ACL "recipients" or "senders" condition, or a router
4066 "senders" option, similar to $domain_data and $local_part_data.
4068 6. Moved the writing of debug_print from before to after the "senders" test
4071 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4072 problems for message scanning, either using a data ACL, or using
4073 local_scan() because the Received: header was not generated till after they
4074 were called (in order to set the time as the time of reception completion).
4075 I have revised the way this works. The header is now generated after the
4076 body is received, but before the ACL or local_scan() are called. After they
4077 are run, the timestamp in the header is updated.
4083 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4084 before starting a queue runner without re-exec. This happened only when
4085 deliver_drop_privilege was set or when the Exim user was set to root. The
4086 effect of the bug was that timeouts during subsequent deliveries caused
4087 crashes instead of being properly handled. The handler is now left at its
4088 default (and expected) setting.
4090 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4091 message, again when deliver_drop_privilege is set or Exim is run as root.
4092 The bug described in (1) was not present in this case, but the tidying up
4093 of the other signals was missing. I have made the two cases consistent.
4095 3. The ignore_target_hosts setting on a manualroute router was being ignored
4096 for hosts that were looked up using the /MX notation.
4098 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4101 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4102 operated on the sender address. After changing the $sender_address to <>
4103 for the sender address verify, Exim was re-instated it as the original
4104 (before rewriting) address, but remembering that it had rewritten it, so it
4105 wasn't rewriting it again. This bug also had the effect of breaking the
4106 sender address verification caching when the sender address was rewritten.
4108 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4109 This has been changed so that if the ip literal address matches
4110 ignore_target_hosts, the router declines.
4112 7. Added expansion conditions match_domain, match_address, and match_local_
4113 part (NOT match_host).
4115 8. The placeholder for the Received: header didn't have a length field set.
4117 9. Added code to Exim itself and to exim_lock to test for a specific race
4118 condition that could lead to file corruption when using MBX delivery. The
4119 issue is with the lockfile that is created in /tmp. If this file is removed
4120 after a process has opened it but before that process has acquired a lock,
4121 there is the potential for a second process to recreate the file and also
4122 acquire a lock. This could lead to two Exim processes writing to the file
4123 at the same time. The added code performs the same test as UW imapd; it
4124 checks after acquiring the lock that its file descriptor still refers to
4125 the same named file.
4127 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4128 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4131 11. Added the smtp_active_hostname option. If used, this will typically be made
4132 to depend on the incoming interface address. Because $interface_address is
4133 not set up until the daemon has forked a reception process, error responses
4134 that can happen earlier (such as "too many connections") no longer contain
4137 12. If an expansion in a condition on a "warn" statement fails because a lookup
4138 defers, the "warn" statement is abandoned, and the next ACL statement is
4139 processed. Previously this caused the whole ACL to be aborted.
4141 13. Added the iplsearch lookup type.
4143 14. Added ident_timeout as a log selector.
4145 15. Added tls_certificate_verified as a log selector.
4147 16. Added a global option tls_require_ciphers (compare the smtp transport
4148 option of the same name). This controls incoming TLS connections.
4150 17. I finally figured out how to make tls_require_ciphers do a similar thing
4151 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4152 before starting the TLS session.
4154 18. Tabs are now shown as \t in -bP output.
4156 19. If the log selector return_path_on_delivery was set, Exim crashed when
4157 bouncing a message because it had too many Received: header lines.
4159 20. If two routers both had headers_remove settings, and the first one included
4160 a superfluous trailing colon, the final name in the first list and the
4161 first name in the second list were incorrectly joined into one item (with a
4162 colon in the middle).
4168 1. Added -C and -D options to the exinext utility, mainly to make it easier
4169 to include in the automated testing, but these could be helpful when
4170 multiple configurations are in use.
4172 2. The exinext utility was not formatting the output nicely when there was
4173 an alternate port involved in the retry record key, nor when there was a
4174 message id as well (for retries that were specific to a specific message
4175 and a specific host). It was also confused by IPv6 addresses, because of
4176 the additional colons they contain. I have fixed the IPv4 problem, and
4177 patched it up to do a reasonable job for IPv6.
4179 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4180 delivery, the log line now contains "pipelined" if PIPELINING was used.
4182 4. An SMTP transport process used to panic and die if the bind() call to set
4183 an explicit outgoing interface failed. This has been changed; it is now
4184 treated in the same way as a connect() failure.
4186 5. A reference to $sender_host_name in the part of a conditional expansion
4187 that was being skipped was still causing a DNS lookup. This no longer
4190 6. The def: expansion condition was not recognizing references to header lines
4191 that used bh_ and bheader_.
4193 7. Added the _cache feature to named lists.
4195 8. The code for checking quota_filecount in the appendfile transport was
4196 allowing one more file than it should have been.
4198 9. For compatibility with Sendmail, the command line option
4206 and sets the incoming protocol and host name (for trusted callers). The
4207 host name and its colon can be omitted when only the protocol is to be set.
4208 Note the Exim already has two private options, -pd and -ps, that refer to
4209 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4210 "s", but I don't think that's a major issue.
4212 10. A number of refactoring changes to the code, none of which should affect
4215 (a) The number of logging options was getting close to filling up the
4216 32-bit word that was used as a bit map. I have split them into two classes:
4217 those that are passed in the argument to log_write(), and those that are
4218 only ever tested independently outside of that function. These are now in
4219 separate 32-bit words, so there is plenty of room for expansion again.
4220 There is no change in the user interface or the logging behaviour.
4222 (b) When building, for example, log lines, the code previously used a
4223 macro that called string_cat() twice, in order to add two strings. This is
4224 not really sufficiently general. Furthermore, there was one instance where
4225 it was actually wrong because one of the argument was used twice, and in
4226 one call a function was used. (As it happened, calling the function twice
4227 did not affect the overall behaviour.) The macro has been replaced by a
4228 function that can join an arbitrary number of extra strings onto a growing
4231 (c) The code for expansion conditions now uses a table and a binary chop
4232 instead of a serial search (which was left over from when there were very
4233 few conditions). Also, it now recognizes conditions like "pam" even when
4234 the relevant support is not compiled in: a suitably worded error message is
4235 given if an attempt is made to use such a condition.
4237 11. Added ${time_interval:xxxxx}.
4239 12. A bug was causing one of the ddress fields not to be passed back correctly
4240 from remote delivery subprocesses. The field in question was not being
4241 subsequently used, so this caused to problems in practice.
4243 13. Added new log selectors queue_time and deliver_time.
4245 14. Might have fixed a bug in maildirsizefile handling that threw up
4246 "unexpected character" debug warnings, and recalculated the data
4247 unnecessarily. In any case, I expanded the warning message to give more
4250 15. Added the message "Restricted characters in address" to the statements in
4251 the default ACL that block characters like @ and % in local parts.
4253 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4254 Three changes have been made:
4256 (a) There was a serious bug; a negative response to MAIL caused the whole
4257 recipient domain to be cached as invalid, thereby blocking all messages
4258 to all local parts at the same domain, from all senders. This bug has
4259 been fixed. The domain is no longer cached after a negative response to
4260 MAIL if the sender used is not empty.
4262 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4265 (c) A new callout option, "use_sender" has been added for people who want
4266 the modified behaviour.
4272 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4275 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4276 indeed breaks things for older releases.
4278 3. Added additional logging to the case where there is a problem reading data
4279 from a filter that is running in a subprocess using a pipe, in order to
4280 try to track down a specific problem.
4282 4. Testing facility fudge: when running in the test harness and attempting
4283 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4284 getting "No route to host". Convert this to a timeout.
4286 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4289 6. Some OS don't have socklen_t but use size_t instead. This affects the
4290 fifth argument of getsockopt() amongst other things. This is now
4291 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4292 can be set for individual OS. I have set it for SunOS5, OSF1, and
4293 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4294 some earlier ones do not.
4296 7. Change 4.30/15 was not doing the test caselessly.
4298 8. The standard form for an IPv6 address literal was being rejected by address
4299 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4300 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4301 this, as well as the form without the "IPv6" on the front (but only when
4302 address literals are enabled, of course).
4304 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4306 10. Exim crashed if a message with an empty sender address specified by -f
4307 encountered a router with an errors_to setting. This could be provoked only
4308 by a command such as
4312 where an empty string was supplied; "<>" did not hit this bug.
4314 11. Installed PCRE release 4.5.
4316 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4317 remained set. It is now erased.
4319 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4320 times from message ids (which are base 36 rather than the normal 62).
4322 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4323 were being counted as actual protocol errors, and logged if the log
4324 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4325 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4326 and DATA following a set of rejected RCPTs do not count as protocol errors.
4327 In other words, Exim assumes they were pipelined, though this may not
4328 actually be the case. Of course, in all cases the client gets an
4329 appropriate error code.
4331 15. If a lookup fails in an ACL condition, a message about the failure may
4332 be available; it is used if testing the ACL cannot continue, because most
4333 such messages specify what the cause of the deferral is. However, some
4334 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4335 that caused an old message to be retained and used if a later statement
4336 caused a defer, replacing the real cause of the deferral.
4338 16. If an IP address had so many PTR records that the DNS lookup buffer
4339 was not large enough to hold them, Exim could crash while trying to process
4340 the truncated data. It now detects and logs this case.
4342 17. Further to 4.21/58, another change has been made: if (and only if) the
4343 first line of a message (the first header line) ends with CRLF, a bare LF
4344 in a subsequent header line has a space inserted after it, so as not to
4345 terminate the header.
4347 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4348 unnecessarily, used atoi() instead of strtol(), and didn't check the
4349 termination when getting file sizes from file names by regex.
4351 19. Completely re-implemented the support for maildirsize files, in the light
4352 of a number of problems with the previous contributed implementation
4353 (4.30/29). In particular:
4355 . If the quota is zero, the maildirsize file is maintained, but no quota is
4358 . If the maildir directory does not exist, it is created before any attempt
4359 to write a maildirsize file.
4361 . The quota value in the file is just a cache; if the quota is changed in
4362 the transport, the new value overrides.
4364 . A regular expression is available for excluding directories from the
4367 20. The autoreply transport checks the characters in options that define the
4368 message's headers; it allows continued headers, but it was checking with
4369 isspace() after an embedded newline instead of explicitly looking for a
4372 21. If all the "regular" hosts to which an address was routed had passed their
4373 expiry times, and had not reached their retry times, the address was
4374 bounced, even if fallback hosts were defined. Now Exim should go on to try
4377 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4378 equivalent code in the SMTP transport. Some hosts send humungous responses
4379 to HELO/EHLO, more than 1024 it seems.
4381 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4382 gives compiler warnings in some environments. I've now done it "properly",
4385 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4386 (because of problems with the built-in one) was declared to return uschar *
4387 instead of char *, causing compiler failure.
4389 25. Fixed a file descriptor leak when processing alias/forward files.
4391 26. Fixed a minor format string issue in dbfn.c.
4393 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4395 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4396 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4399 29. When a sender address is verified, it is cached, to save repeating the test
4400 when there is more than one recipient in a message. However, when the
4401 verification involves a callout, it is possible for different callout
4402 options to be set for different recipients. It is too complicated to keep
4403 track of this in the cache, so now Exim always runs a verification when a
4404 callout is required, relying on the callout cache for the optimization.
4405 The overhead is duplication of the address routing, but this should not be
4408 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4409 to be verified with callout=postmaster, and the main callout worked but the
4410 postmaster check failed, the verification correctly failed. However, if a
4411 subsequent RCPT command asked for sender verification *without* the
4412 postmaster check, incorrect caching caused this verification also to fail,
4415 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4416 it was not caching the DNS options (qualify_single, search_parents) that
4417 were used when the lookup failed. A subsequent lookup with different
4418 options therefore always gave the same answer, though there were cases
4419 where it should not have. (Example: a "domains = !$mx_any" option on a
4420 dnslookup router: the "domains" option is always processed without any
4421 widening, but the router might have qualify_single set.) Now Exim uses the
4422 cached value only when the same options are set.
4424 32. Added John Jetmore's "exipick" utility to the distribution.
4426 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4427 than a timeout (e.g. a certificate is required, and is not provided), an
4428 Exim server now closes the connection immediately. Previously it waited for
4429 the client to close - but if the client is SSL, it seems that they each
4430 wait for each other, leading to a delay before one of them times out.
4432 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4433 maintained 0.8.x compatibility because I don't think many are using it, and
4434 it is clearly obsolete.
4436 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4439 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4440 client certificate was expired. A simple patch fixes this, though I don't
4441 understand the full logic of why the verify callback is called multiple
4444 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4445 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4446 which causes problems with some clients (such as the Certicom SSL Plus
4447 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4448 disables the coutermeasure allowing Eudora to connect."
4450 38. Exim was not checking that a write() to a log file succeeded. This could
4451 lead to Bad Things if a log got too big, in particular if it hit a file
4452 size limit. Exim now panics and dies if it cannot write to a log file, just
4453 as it does if it cannot open a log file.
4455 39. Modified OS/Makefile-Linux so that it now contains
4457 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4459 The two -D definitions ensure that Exim is compiled with large file
4460 support, which makes it possible to handle log files that are bigger than
4463 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4464 instance) a domain was checked against a named list that involved a lookup,
4465 causing $domain_data to be set, then another domain was checked against the
4466 same list, then the first domain was re-checked, the value of $domain_data
4467 after the final check could be wrong. In particular, if the second check
4468 failed, it could be set empty. This bug probably also applied to
4471 41. The strip_trailing_dot option was not being applied to the address given
4472 with the -f command-line option.
4474 42. The code for reading a message's header from the spool was incrementing
4475 $received_count, but never initializing it. This meant that the value was
4476 incorrect (doubled) while delivering a message in the same process in which
4477 it was received. In the most common configuration of Exim, this never
4478 happens - a fresh exec is done - but it can happen when
4479 deliver_drop_privilege is set.
4481 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4482 it now includes up to 150 characters of the unexpected data in the log
4485 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4486 and building data strings. The size of both of these buffers was 10 000
4487 bytes - far larger than anybody would *ever* want, thought I. Needless to
4488 say, somebody hit the limit. I have increased the maximum line length to
4489 20 000 and the maximum data length of concatenated lines to 100 000. I have
4490 also fixed two bugs, because there was no checking on these buffers. Tsk,
4491 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4492 buffer is too small.
4494 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4495 lsearch lookups. Now it does.
4497 46. When parsing a route_list item in a manualroute router, a fixed-length
4498 buffer was used for the list of hosts. I made this 1024 bytes long,
4499 thinking that nobody would ever have a list of hosts that long. Wrong.
4500 Somebody had a whole pile of complicated expansion conditions, and the
4501 string was silently truncated, leading to an expansion error. It turns out
4502 that it is easier to change to an unlimited length (owing to other changes
4503 that have happened since this code was originally written) than to build
4504 structure for giving a limitation error. The length of the item that
4505 expands into the list of hosts is now unlimited.
4507 47. The lsearch lookup could not handle data where the length of text line was
4508 more than 4095 characters. Such lines were truncated, leading to shortened
4509 data being returned. It should now handle lines of any length.
4511 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4512 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4515 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4516 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4517 no longer happens in comment lines. A list of replacements is now placed
4518 at the head of all of the source files, except those whose only change is
4519 to replace PERL_COMMAND in the very first #! line.
4521 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4522 messages on the queue, with a bottom-up merge sort, using code contributed
4523 by Michael Haardt. This should make operations like -bp somewhat faster on
4524 large queues. It won't affect queue runners, except when queue_run_in_order
4527 51. Installed eximstats 1.31 in the distribution.
4529 52. Added support for SRV lookups to the dnslookup router.
4531 53. If an ACL referred to $message_body or $message_body_end, the value was not
4532 reset for any messages that followed in the same SMTP session.
4534 54. The store-handling optimization for building very long strings was not
4535 differentiating between the different store pools. I don't think this
4536 actually made any difference in practice, but I've tidied it.
4538 55. While running the routers to verify a sender address, $sender_address
4539 was still set to the sender address. This is wrong, because when routing to
4540 send a bounce to the sender, it would be empty. Therefore, I have changed
4541 it so that, while verifying a sender address, $sender_address is set to <>.
4542 (There is no change to what happens when verifying a recipient address.)
4544 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4545 target A or AAAA records (if not already returned) without resetting the
4546 qualify_single or search_parents options of the DNS resolver. These are
4547 inappropriate in this case because the targets of MX and SRV records must
4548 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4549 target that, when qualified, matched something in the local domain. These
4550 two options are now turned off when doing these lookups.
4552 57. It seems that at least some releases of Reiserfs (which does not have the
4553 concept of a fixed number of inodes) returns zero and not -1 for the
4554 number of available inodes. This interacted badly with check_spool_inodes,
4555 which assumed that -1 was the "no such thing" setting. What I have done is
4556 to check that the total number of inodes is greater than zero before doing
4557 the test of how many are available.
4559 58. When a "warn" ACL statement has a log_message modifier, the message is
4560 remembered, and not repeated. This is to avoid a lot of repetition when a
4561 message has many recipients that cause the same warning to be written.
4562 Howewer, Exim was preserving the list of already written lines for an
4563 entire SMTP session, which doesn't seem right. The memory is now reset if a
4564 new message is started.
4566 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4567 debugging output unless log_rewrite was also set.
4569 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4570 of (int)(handle) when we know that handle contains (void *)(-1).
4572 61. The Exim daemon panic-logs an error return when it closes the incoming
4573 connection. However "connection reset by peer" seems to be common, and
4574 isn't really an error worthy of noting specially, so that particular error
4577 62. When Exim is trying to find all the local interfaces, it used to panic and
4578 die if the ioctl to get the interface flags failed. However, it seems that
4579 on at least one OS (Solaris 9) it is possible to have an interface that is
4580 included in the list of interfaces, but for which you get a failure error
4581 for this call. This happens when the interface is not "plumbed" into a
4582 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4583 failure of the "get flags" call assumes that the interface is down.
4585 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4586 makes life easier for people who are doing arithmetic on fields extracted
4587 from dates, where you often get leading zeros that should not be
4588 interpreted as octal.
4590 64. Added qualify_domain to the redirect router, to override the global
4593 65. If a pathologically long header line contained very many addresses (the
4594 report of this problem mentioned 10 000) and each of them was rewritten,
4595 Exim could use up a very large amount of memory. (It kept on making new
4596 copies of the header line as it rewrote, and never released the old ones.)
4597 At the expense of a bit more processing, the header rewriting function has
4598 been changed so that it no longer eats memory in this way.
4600 66. The generation of the Received: header has been moved from the time that a
4601 message starts to be received, to the time that it finishes. The timestamp
4602 in the Received: header should now be very close to that of the <= log
4603 line. There are two side-effects of this change:
4605 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4606 logged header lines no longer include the local Received: line, because
4607 it has not yet been created. The same applies to a copy of the message
4608 that is returned to a non-SMTP sender when a message is rejected.
4610 (b) When a filter file is tested using -bf, no additional Received: header
4611 is added to the test message. After some thought, I decided that this
4614 This change does not affect the value of $received_for. It is still set
4615 after address rewriting, but before local_scan() is called.
4617 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4619 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4620 gave an unhelpful panic error message, and a defer error. I have managed to
4621 change this behaviour so that it now rejects any supplied certificate,
4622 which seems right, as the list of acceptable certificates is empty.
4624 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4625 gave an unhelpful defer error. I have not managed to make this reject any
4626 supplied certificates, but the error message it gives is "no certificate
4627 supplied", which is not helpful.
4629 70. exigrep's output now also includes lines that are not associated with any
4630 message, but which match the given pattern. Implemented by a patch from
4631 Martin Sluka, which also tidied up the Perl a bit.
4633 71. Recipient callout verification, like sender verification, was using <> in
4634 the MAIL FROM command. This isn't really the right thing, since the actual
4635 sender may affect whether the remote host accepts the recipient or not. I
4636 have changed it to use the actual sender in the callout; this means that
4637 the cache record is now keyed on a recipient/sender pair, not just the
4638 recipient address. There doesn't seem to be a real danger of callout loops,
4639 since a callout by the remote host to check the sender would use <>.
4640 [SEE ABOVE: changed after hitting problems.]
4642 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4643 temporary errors. However, in the case of such a code being given after
4644 the end of a data transmission (i.e. after ".") Exim was failing to write
4645 a retry record for the message. (Yes, there was some broken host that was
4646 actually sending 8xx at this point.)
4648 73. An unknown lookup type in a host list could cause Exim to panic-die when
4649 the list was checked. (An example that provoked this was putting <; in the
4650 middle of a list instead of at the start.) If this happened during a DATA
4651 ACL check, a -D file could be left lying around. This kind of configuration
4652 error no longer causes Exim to die; instead it causes a defer errror. The
4653 incident is still logged to the main and panic logs.
4655 74. Buglet left over from Exim 3 conversion. The message "too many messages
4656 in one connection" was written to the rejectlog but not the mainlog, except
4657 when address rewriting (yes!) was being logged.
4659 75. Added write_rejectlog option.
4661 76. When a system filter was run not as root (that is, when system_filter_user
4662 was set), the values of the $n variables were not being returned to the
4663 main process; thus, they were not subsequently available in the $sn
4666 77. Added +return_path_on_delivery log selector.
4668 78. A connection timeout was being treated differently from recipients deferred
4669 when testing hosts_max_try with a message that was older than the host's
4670 retry timeout. (The host should not be counted, thus allowing all hosts to
4671 be tried at least once before bouncing.) This may have been the cause of an
4672 occasionally reported bug whereby a message would remain on the queue
4673 longer than the retry timeout, but would be bounced if a delivery was
4674 forced. I say "may" because I never totally pinned down the problem;
4675 setting up timeout/retry tests is difficult. See also the next item.
4677 79. The ultimate address timeout was not being applied to errors that involved
4678 a combination of host plus message (for example, a timeout on a MAIL
4679 command). When an address resolved to a number of possible hosts, and they
4680 were not all tried for each delivery (e.g. because of hosts_max_try), a
4681 message could remain on the queue longer than the retry timeout.
4683 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4686 81. Fixed an obscure SMTP outgoing bug which required at least the following
4687 conditions: (a) there was another message waiting for the same server;
4688 (b) the server returned 5xx to all RCPT commands in the first message so
4689 that the message was not completed; (c) the server dropped the connection
4690 or gave a negative response to the RSET that Exim sends to abort the
4691 transaction. The observed case was a dropped connection after DATA that had
4692 been sent in pipelining mode. That is, the server had advertised PIPELINING
4693 but was not implementing it correctly. The effect of the bug was incorrect
4694 behaviour, such as trying another host, and this could lead to a crash.
4700 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4701 and daemon.c were passed as pointers to ints; they should have been
4702 pointers to socklen_t variables (which are typically unsigned ints).
4704 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4707 3. Fixed a really odd bug that affected only the testing scheme; patching a
4708 certain fixed string in the binary changed the value of another string that
4709 happened to be identical to the end of the original first string.
4711 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4712 name", it returns that address as the IP address. On some operating
4713 systems (e.g. Solaris), it also passes back the IP address string as the
4714 "host name". However, on others (e.g. Linux), it passes back an empty
4715 string. Exim wasn't checking for this, and was changing the host name to an
4716 empty string, assuming it had been canonicized.
4718 5. Although rare, it is permitted to have more than one PTR record for a given
4719 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4720 all the names associated with an address, because they do in Solaris.
4721 However, it seems that they do not in Linux for data that comes from the
4722 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4723 I found this out when I moved to a new Linux workstation and tried to run
4724 the Exim test suite.
4726 To get round this problem I have changed the code so that it now does its
4727 own call to the DNS to look up PTR records when searching for a host name.
4728 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4729 addresses that are only in /etc/hosts are still found.
4731 This behaviour is, however, controlled by an option called host_lookup_
4732 order, which defaults to "bydns:byaddr". If people want to use the other
4733 order, or indeed, just use one or the other means of lookup, they can
4734 specify it in this variable.
4736 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4737 some operating systems, this comes back from gethostbyaddr() as an empty
4738 string, and this is what Exim used to test for. However, it seems that in
4739 other systems, "." is yielded. Exim now tests for this case too.
4741 7. The values of check_spool_space and check_log_space are now held internally
4742 as a number of kilobytes instead of an absolute number of bytes. If a
4743 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4744 kilobyte. This means that much larger values can be stored.
4746 8. Exim monitor: an attempt to get the action menu when not actually pointing
4747 at a message produces an empty menu entitled "No message selected". This
4748 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4749 no entries in it ("Shell widget menu has zero width and/or height"). So I
4750 have added a single, blank menu entry in this case.
4752 9. Added ${quote_local_part.
4754 10. MIME decoding is now applied to the contents of Subject: header lines when
4757 11. Now that a reference to $sender_host_address automatically causes a reverse
4758 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4759 host lookup before query-style lookups in lists that might use this
4760 variable. This has therefore been abolished, and the "net-" prefix is no
4761 longer necessary for query-style lookups.
4763 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4764 have been a typo for LFLAGS, so it has been changed.
4766 13. The install script calls Exim with "-C /dev/null" in order to find the
4767 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4768 to be output. Howeve, since Exim outputs its version number before the
4769 error, it didn't break the script. It just looked ugly. I fixed this by
4770 always allowing "-C /dev/null" if the caller is root.
4772 14. Ignore overlarge ACL variable number when reading spool file - insurance
4773 against a later release with more variables having written the file.
4775 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4776 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4777 this, as well as the form without the "IPv6" on the front.
4779 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4780 OS/Makefile-Darwin file.
4782 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4783 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4785 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4786 variable. However, some OS use ints for inodes. I've added cast to long int
4787 to get rid of the compiler warning.
4789 19. I had forgotten to lock out "/../" in configuration file names when
4790 ALT_CONFIG_PREFIX was set.
4792 20. Routers used for verification do not need to specify transports. However,
4793 if such a router generated a host list, and callout was configured, Exim
4794 crashed, because it could not find a port number from the (non-existent)
4795 transport. It now assumes port 25 in this circumstance.
4797 21. Added the -t option to exigrep.
4799 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4800 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4801 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4802 them is set, LOOKUP_LSEARCH is forced.
4804 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4806 24. Added sender and host information to the "rejected by local_scan()" log
4807 line; previously there was no indication of these.
4809 25. Added .include_if_exists.
4811 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4812 Linux. It turns out that not all file systems support this. Apparently some
4813 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4814 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4815 not supported on the file descriptor, is now ignored when Exim is trying to
4816 sync a directory. This applies only to Linux.
4818 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4820 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4821 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4824 29. Added support for maildirsize files from supplied patch (modified a bit).
4826 30. The use of :fail: followed by an empty string could lead Exim to respond to
4827 sender verification failures with (e.g.):
4829 550 Verification failed for <xxx>
4830 550 Sender verify failed
4832 where the first response line was missing the '-' that indicates it is not
4833 the final line of the response.
4835 31. The loop for finding the name of the user that called Exim had a hardwired
4836 limit of 10; it now uses the value of finduser_retries, which is used for
4837 all other user lookups.
4839 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4842 33. Exim was neglecting to zero errno before one call of strtol() when
4843 expanding a string and expecting an integer value. On some systems this
4844 resulted in spurious "integer overflow" errors. Also, it was casting the
4845 result into an int without checking.
4847 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4848 did not work. The code looks as if it has *never* worked, though it appears
4849 to have been documented since at least releast 1.62. I have made it work.
4851 35. The "timeout_DNS" error in retry rules, also documented since at least
4852 1.62, also never worked. As it isn't clear exactly what this means, and
4853 clearly it isn't a major issue, I have abolished the feature by treating it
4854 as "timeout", and writing a warning to the main and panic logs.
4856 36. The display of retry rules for -brt wasn't always showing the error code
4859 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4860 timeout_connect_A, timeout_connect_MX.
4862 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4863 to the empty sender.
4865 39. The daemon was not analysing the content of -oX till after it had closed
4866 stderr and disconnected from the controlling terminal. This meant that any
4867 syntax errors were only noted on the panic log, and the return code from
4868 the command was 0. By re-arranging the code a little, I've made the
4869 decoding happen first, so such errors now appear on stderr, and the return
4870 code is 1. However, the actual setting up of the sockets still happens in
4871 the disconnected process, so errors there are still only recorded on the
4874 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4875 connections (as happens on some IP stacks) was logged at start up time as
4876 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4877 it from "IPv6 and IPv4", which means that two separate sockets are being
4880 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4881 says whether AF_INET or AF_INET6 was passed as an argument.
4883 42. Exiwhat output was messed up when time zones were included in log
4886 43. Exiwhat now gives more information about the daemon's listening ports,
4887 and whether -tls-on-connect was used.
4889 44. The "port" option of the smtp transport is now expanded.
4891 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4892 silently ignored. Now an error message is written to the main and panic
4895 46. There's a new ACL modifier called "logwrite" which writes to a log file
4896 as soon as it is encountered.
4898 47. Added $local_user_uid and $local_user_gid at routing time.
4900 48. Exim crashed when trying to verify a sender address that was being
4903 49. Exim was recognizing only a space character after ".include". It now also
4904 recognizes a tab character.
4906 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4907 extracting the relevant information from the specification. The man page no
4908 longer contains scrambled data for the -d option, and I've added a section
4909 at the front about calling Exim under different names.
4911 51. Added "extra_headers" argument to the "mail" command in filter files.
4913 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4916 53. Installed eximstats 1.29.
4918 54. Added transport_filter_timeout as a generic transport option.
4920 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4921 Cc: header lines. This was required by RFC 822, but it not required by RFC
4924 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4925 incoming messages that did not have them. Now it does so only if the
4926 message originates locally, that is, if there is no associated remote host
4927 address. When Resent- header lines are present, this applies to the Resent-
4928 lines rather than the non-Resent- lines.
4930 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4931 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4933 58. Messages for configuration errors now include the name of the main
4934 configuration file - useful now that there may be more than one file in a
4935 list (.included file names were always shown).
4937 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4938 for those rare installations that do not start the daemon as root or run it
4939 setuid root. I've cut out the call to initgroups() if the daemon is not
4942 60. The Exim user and group can now be bound into the binary as text strings
4943 that are looked up at the start of Exim's processing.
4945 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4947 62. Added $mailstore_basename variable.
4949 63. Installed patch to sieve.c from Michael Haardt.
4951 64. When Exim failed to open the panic log after failing to open the main log,
4952 the original message it was trying to log was written to stderr and debug
4953 output, but if they were not available (the usual case in production), it
4954 was lost. Now it is written to syslog before the two lines that record the
4955 failures to open the logs.
4957 65. Users' Exim filters run in subprocesses under the user's uid. It is
4958 possible for a "deliver" command or an alias in a "personal" command to
4959 provoke an address rewrite. If logging of address rewriting is configured,
4960 this fails because the process is not running as root or exim. There may be
4961 a better way of dealing with this, but for the moment (because 4.30 needs
4962 to be released), I have disabled address rewrite logging when running a
4963 filter in a non-root, non-exim process.
4969 1. The buildconfig auxiliary program wasn't quoting the value set for
4970 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4971 not defined. This bug was masked in 4.22 by the effect that was fixed in
4974 2. Some messages that were rejected after a message id was allocated were
4975 shown as "incomplete" by exigrep. It no longer does this for messages that
4976 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4978 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4979 have allow_domain_literals set, the ID did not get logged in the <= line.
4980 Domain literals are now always recognized in Message-ID: header lines.
4982 4. The first argument for a ${extract expansion item is the key name or field
4983 number. Leading and trailing spaces in this item were not being ignored,
4984 causing some misleading effects.
4986 5. When deliver_drop_privilege was set, single queue runner processes started
4987 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4988 same command in the process it spins off) were not dropping privilege.
4990 6. When the daemon running as "exim" started a queue runner, it always
4991 re-executed Exim in the spun-off process. This is a waste of effort when
4992 deliver_drop_privilege is set. The new process now just calls the
4993 queue-runner function directly.
4999 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5002 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5003 ignored. Though the use of -oP was forcing the writing of a pid file, it
5004 was always written to the default place.
5006 3. If the message "no IP address found for host xxxx" is generated during
5007 incoming verification, it is now followed by identification of the incoming
5008 connection (so you can more easily find what provoked it).
5010 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5012 5. Added some features to "harden" Exim a bit more against certain attacks:
5014 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5015 be put in Local/Makefile. This is like the never_users runtime option,
5016 but it cannot be overridden. The default setting is "root".
5018 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5019 prefix string with which any file named in a -C command line option
5022 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5023 is retained for -C and -D only if the caller of Exim is root. Without
5024 it, the exim user may also use -C and -D and retain privilege.
5026 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5027 command line option is disabled.
5029 6. Macro names set by the -D option must start with an upper case letter, just
5030 like macro names defined in the configuration file.
5032 7. Added "dereference=" facility to LDAP.
5034 8. Two instances of the typo "uknown" in the source files are fixed.
5036 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5037 the Configure-Makefile script screwed up while processing it.
5039 10. Incorporated PCRE 4.4.
5041 11. The SMTP synchronization check was not operating right at the start of an
5042 SMTP session. For example, it could not catch a HELO sent before the client
5043 waited for the greeting. There is now a check for outstanding input at the
5044 point when the greeting is written. Because of the duplex, asynchronous
5045 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5046 way, but not yet received, when the check is performed.
5048 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5049 on TCP/IP sockets, because this apparently causes some broken clients to
5052 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5053 unchanged) from the Cygwin maintainer.
5055 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5056 was supported instead of testing for mbx. Effectively a typo.
5058 15. The spa authenticator server code was not checking that the input it
5059 received was valid base64.
5061 16. The debug output line for the "set" modifier in ACLs was not showing the
5062 name of the variable that was being set.
5064 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5066 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5067 lookup on its own. Something else was needed to trigger the lookup. For
5068 example, a match in host_lookup or the need for a host name in a host list.
5069 Now, if $sender_host_name is referenced and the host name has not yet been
5070 looked up, a lookup is performed. If the lookup fails, the variable remains
5071 empty, and $host_lookup_failed is set to "1".
5073 19. Added "eqi" as a case-independent comparison operator.
5075 20. The saslauthd authentication condition could segfault if neither service
5076 nor realm was specified.
5078 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5079 error message that was logged was misleading, and incoming SMTP
5080 connections were dropped. The message is now more accurate, and temporary
5081 errors are given to SMTP connections.
5083 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5084 (except RSET) with a 421 error, until QUIT is received. However, it was
5085 failing to send a response to QUIT.
5087 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5088 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5089 ACL is now run after the helo_try_verify_hosts code.
5091 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5092 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5093 case-independent, so other case variants are also recognized). Apparently
5094 some systems use these upper case variants.
5096 25. If more than two messages were waiting for the same host, and a transport
5097 filter was specified for the transport, Exim sent two messages over the
5098 same TCP/IP connection, and then failed with "socket operation on non-
5099 socket" when it tried to send the third.
5101 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5103 27. The extern definition of crypt16() in expand.c was not being excluded when
5104 the OS had its own crypt16() function.
5106 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5107 as a preferred synonym for return_size_limit, both as an option and as an
5110 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5112 30. Changed the default configuration ACL to relax the local part checking rule
5113 for addresses that are not in any local domains. For these addresses,
5114 slashes and pipe symbols are allowed within local parts, but the sequence
5115 /../ is explicitly forbidden.
5117 31. SPA server authentication was not clearing the challenge buffer before
5120 32. log_message in a "warn" ACL statement was writing to the reject log as
5121 well as to the main log, which contradicts the documentation and doesn't
5122 seem right (because no rejection is happening). So I have stopped it.
5124 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5125 However, I am unable to do any testing of this.
5127 34. Fixed an infelicity in the appendfile transport. When checking directories
5128 for a mailbox, to see if any needed to be created, it was accidentally
5129 using path names with one or more superfluous leading slashes; tracing
5130 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5132 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5133 contents are added to the log line that is written for every discarded
5134 recipient. (Previously a log_message setting was ignored.)
5136 36. The ${quote: operator now quotes the string if it is empty.
5138 37. The install script runs exim in order to find its version number. If for
5139 some reason other than non-existence or emptiness, which it checks, it
5140 could not run './exim', it was installing it with an empty version number,
5141 i.e. as "exim-". This error state is now caught, and the installation is
5144 38. An argument was missing from the function that creates an error message
5145 when Exim fails to connect to the socket for saslauthd authentication.
5146 This could cause Exim to crash, or give a corrupted message.
5148 39. Added isip, isip4, and isip6 to ${if conditions.
5150 40. The ACL variables $acl_xx are now saved with the message, and can be
5151 accessed later in routers, transports, and filters.
5153 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5154 strings in the file are not string-expanded.
5156 42. If a MAIL command specified a SIZE value that was too large to fit into an
5157 int variable, the check against message_size_limit failed. Such values are
5158 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5159 day this will have to be increased, but I don't think I want to be around
5160 when emails are that large.
5167 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5168 iconv() is not standard in FreeBSD.
5170 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5171 IPv6 enabled. The observed symptom was a segmentation fault on return from
5172 the function os_common_find_running_interfaces() in src/os.c.
5174 3. In the check_special_case() function in daemon.c I had used "errno" as an
5175 argument name, which causes warnings on some systems. This was basically a
5176 typo, since it was named "eno" in the comments!
5178 4. The code that waits for the clock to tick (at a resolution of some fraction
5179 of a second) so as to ensure message-id uniqueness was always waiting for
5180 at least one whole tick, when it could have waited for less. [This is
5181 almost certainly not relevant at current processor speeds, where it is
5182 unlikely to ever wait at all. But we try to future-proof.]
5184 5. The function that sleeps for a time interval that includes fractions of a
5185 second contained a race. It did not block SIGALRM between setting the
5186 timer, and suspending (a couple of lines later). If the interval was short
5187 and the sigsuspend() was delayed until after it had expired, the suspension
5188 never ended. On busy systems this could lead to processes getting stuck for
5191 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5192 process, before it forks any delivery processes. The open lookup caching
5193 mechanism meant that the open file or database connection was passed into
5194 the delivery process. The problem was that delivery processes always tidy
5195 up cached lookup data. This could cause a problem for the next delivery
5196 process started by the queue runner, because the external queue runner
5197 process does not know about the closure. So the next delivery process
5198 still has data in the lookup cache. In the case of a file lookup, there was
5199 no problem because closing a file descriptor in a subprocess doesn't affect
5200 the parent. However, if the lookup was caching a connection to a database,
5201 the connection was closed, and the second delivery process was likely to
5202 see errors such as "PGSQL: query failed: server closed the connection
5203 unexpectedly". The problem has been fixed by closing all cached lookups
5204 in a queue runner before running a delivery process.
5206 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5207 seem to have the "const" qualifier which it has on other OS. I've
5210 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5211 *of the same type* (client or server) with the same public name that an
5212 error should be diagnosed.
5214 9. When Exim looked up a host name for an IP address, but failed to find the
5215 original IP address when looking up the host name (a safety check), it
5216 output the message "<ip address> does not match any IP for NULL", which was
5217 confusing, to say the least. The bug was that the host name should have
5218 appeared instead of "NULL".
5220 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5221 user that is built into the binary, and the -C or -D options is used, root
5222 privilege is dropped before the configuration file is read. In addition,
5223 logging is switched to stderr instead of the normal log files. If the
5224 configuration then re-defines the Exim user, the unprivileged environment
5225 is probably not what is expected, so Exim logs a panic warning message (but
5228 However, if deliver_drop_privilege is set, the unprivileged state may well
5229 be exactly what is intended, so the warning has been cut out in that case,
5230 and Exim is allowed to try to write to its normal log files.
5236 1. smtp_return_error_details was not giving details for temporary sender
5237 or receiver verification errors.
5239 2. Diagnose a configuration error if two authenticators have the same public
5242 3. Exim used not to create the message log file for a message until the first
5243 delivery attempt. This could be confusing when incoming messages were held
5244 for policy or load reasons. The message log file is now created at the time
5245 the message is received, and an initial "Received" line is written to it.
5247 4. The automatically generated man page for command line options had a minor
5248 bug that caused no ill effects; however, a more serious problem was that
5249 the procedure for building the man page automatically didn't always
5250 operate. Consequently, release 4.20 contains an out-of-date version. This
5251 shouldn't happen again.
5253 5. When building Exim with embedded Perl support, the script that builds the
5254 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5255 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5257 6. The freeze_tell option was not being used for messages that were frozen on
5258 arrival, either by an ACL or by local_scan().
5260 7. Added the smtp_incomplete_transaction log selector.
5262 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5263 was accepting AUTH without a new EHLO.
5265 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5266 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5269 10. Logging of TCP/IP connections (when configured) now happens in the main
5270 daemon process instead of the child process, so that the TCP/IP connection
5271 count is more accurate (but it can never be perfect).
5273 11. The use of "drop" in a nested ACL was not being handled correctly in the
5274 outer ACL. Now, if condition failure induced by the nested "drop" causes
5275 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5276 or "require"), the connection is dropped.
5278 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5279 that yield "discard" can now be used with an "accept" or a "discard" verb,
5280 but an error is generated for any others (because I can't see a useful way
5281 to define what should happen).
5283 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5284 are now processed in the same way as lines in the Exim configuration file.
5285 In particular, continuation lines are supported.
5287 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5289 15. Added -ti meaning -t -i.
5291 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5292 domains, and warn by logging if others are found.
5294 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5295 returned from GIFCONF when Exim is trying to find the list of interfaces on
5296 a host. The code in os.c has been modified to copy each ifreq to an aligned
5297 structure in all cases.
5299 Also, in some cases, the returned ifreq's were being copied to a 'struct
5300 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5301 means the last couple of bytes of an IPv6 address could be chopped if the
5302 ifreq contained only a normal sockaddr (14 bytes storage).
5304 18. Named domain lists were not supported in the hosts_treat_as_local option.
5305 An entry such as +xxxx was not recognized, and was treated as a literal
5308 19. Ensure that header lines added by a DATA ACL are included in the reject log
5309 if the ACL subsequently rejects the message.
5311 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5312 MD5 (which is deprecated).
5314 21. When testing a filter file using -bf, Exim was writing a message when it
5315 took the sender from a "From " line in the message, but it was not doing so
5316 when it took $return_path from a Return-Path: header line. It now does.
5318 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5319 with a valid header line field name (a series of printing characters
5320 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5322 23. Changed "disc" in the source to "disk" to conform to the documentation and
5323 the book and for uniformity.
5325 24. Ignore Sendmail's -Ooption=value command line item.
5327 25. When execve() failed while trying to run a command in a pipe transport,
5328 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5329 could be confused with a return value of 69 from the command itself. This
5330 has been changed to 127, the value the shell returns if it is asked to run
5331 a non-existent command. The wording for the related log line suggests a
5332 non-existent command as the problem.
5334 26. If received_header_text expands to an empty string, do not add a Received:
5335 header line to the message. (Well, it adds a token one on the spool, but
5336 marks it "old" so that it doesn't get used or transmitted.)
5338 27. Installed eximstats 1.28 (addition of -nt option).
5340 28. There was no check for failure on the call to getsockname() in the daemon
5341 code. This can fail if there is a shortage of resources on the system, with
5342 ENOMEM, for example. A temporary error is now given on failure.
5344 29. Contrary to the C standard, it seems that in some environments, the
5345 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5346 program. Exim now does this explicitly; it affects the formatting of
5347 timestamps using strftime().
5349 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5350 complaints. I've now initialized all the variables, to avoid this.
5352 32. Header lines added by a system filter were not being "seen" during
5353 transport-time rewrites.
5355 33. The info_callback() function passed to OpenSSL is set up with type void
5356 (*)(SSL *, int, int), as described somewhere. However, when calling the
5357 function (actually a macro) that sets it up, the type void(*)() is
5358 expected. I've put in a cast to prevent warnings from picky compilers.
5360 34. If a DNS black list lookup found a CNAME record, but there were no A
5361 records associated with the domain it pointed at, Exim crashed.
5363 35. If a DNS black list lookup returned more than one A record, Exim ignored
5364 all but the first. It now scans all returned addresses if a particular IP
5365 value is being sought. In this situation, the contents of the
5366 $dnslist_value variable are a list of all the addresses, separated by a
5369 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5370 to accept a host name and all its aliases if the forward lookup for any of
5371 them yielded the IP address of the incoming connection. Now it accepts only
5372 those names whose forward lookup yields the correct IP address. Any other
5373 names are discarded. This closes a loophole whereby a rogue DNS
5374 administrator could create reverse DNS records to break through a
5375 wildcarded host restriction in an ACL.
5377 37. If a user filter or a system filter that ran in a subprocess used any of
5378 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5379 the wrong values were passed to the pipe command ($thisaddress had the
5380 value of $0, $0 had the value of $1, etc). This bug was introduced by
5381 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5383 38. Improved the line breaking for long SMTP error messages from ACLs.
5384 Previously, if there was no break point between 40 and 75 characters, Exim
5385 left the rest of the message alone. Two changes have been made: (a) I've
5386 reduced the minimum length to 35 characters; (b) if it can't find a break
5387 point between 35 and 75 characters, it looks ahead and uses the first one
5388 that it finds. This may give the occasional overlong line, but at least the
5389 remaining text gets split now.
5391 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5392 file descriptors might be low, and that setting 1000 would always raise it.
5393 It turns out that in some environments, the limit is already over 1000 and
5394 that lowering it causes trouble. So now Exim takes care not to decrease it.
5396 40. When delivering a message, the value of $return_path is set to $sender_
5397 address at the start of routing (routers may change the value). By an
5398 oversight, this default was not being set up when an address was tested by
5399 -bt or -bv, which affected the outcome if any router or filter referred to
5402 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5403 log only when "message" or "log_message" are set. However, if one of the
5404 conditions was an address verification, or a call to a nested ACL, the
5405 messages generated by the underlying test were being passed through. This
5406 no longer happens. The underlying message is available in $acl_verify_
5407 message for both "message" and "log_message" expansions, so it can be
5408 passed through if needed.
5410 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5411 new expansion $bh_ to give the encoded byte string without charset
5412 translation. Translation happens only if iconv() is available; HAVE_ICONV
5413 indicates this at build time. HEADERS_CHARSET gives the charset to
5414 translate to; headers_charset can change it in the configuration, and
5415 "headers charset" can change it in an individual filter file.
5417 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5418 that creates RFC 2047 encoded "words" labels them as that charset instead
5419 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5420 expansion operator; (ii) when Exim creates a From: line for a local
5421 message; (iii) when a header line is rewritten to include a "phrase" part.
5423 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5424 buggy, causing it to skip the first lines of messages whose message ID
5425 ended in 'D'. This would not have bitten before Exim release 4.14, because
5426 message IDs were unlikely to end in 'D' before then. The effect was to have
5427 incorrect size information for certain domains.
5429 45. #include "config.h" was missing at the start of the crypt16.c module. This
5430 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5433 46. If there was a timeout during a "random" callout check, Exim treated it as
5434 a failure of the random address, and carried on sending RSET and the real
5435 address. If the delay was just some slowness somewhere, the response to the
5436 original RCPT would be taken as a response to RSET and so on, causing
5437 mayhem of various kinds.
5439 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5440 when I implemented it. It didn't allow for the fact that some option values
5441 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5442 the right test for positive values.
5444 48. Domain names in DNS records are case-independent. Exim always looks them up
5445 in lower case. Some resolvers return domain names in exactly the case they
5446 appear in the zone file, that is, they may contain uppercase letters. Not
5447 all resolvers do this - some return always lower case. Exim was treating a
5448 change of case by a resolver as a change of domain, similar to a widening
5449 of a domain abbreviation. This triggered its re-routing code and so it was
5450 trying to route what was effectively the same domain again. This normally
5451 caused routing to fail (because the router wouldn't handle the domain
5452 twice). Now Exim checks for this case specially, and just changes the
5453 casing of the domain that it ultimately uses when it transmits the message
5456 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5459 50. If a filter generated a file delivery with a non-absolute name (possible if
5460 no home directory exists for the router), the forbid_file option was not
5463 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5464 the existing equality matching.
5466 52. Exim was using ints instead of ino_t variables in some places where it was
5467 dealing with inode numbers.
5469 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5470 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5471 called TMPDIR, and if it finds it is different, it changes its value.
5473 54. The smtp_printf() function is now made available to local_scan() so
5474 additional output lines can be written before returning. There is also an
5475 smtp_fflush() function to enable the detection of a dropped connection.
5476 The variables smtp_input and smtp_batched_input are exported to
5479 55. Changed the default runtime configuration: the message "Unknown user"
5480 has been removed from the ACL, and instead placed on the localuser router,
5481 using the cannot_route_message feature. This means that any verification
5482 failures that generate their own messages won't get overridden. Similarly,
5483 the "Unrouteable address" message that was in the ACL for unverifiable
5484 relay addresses has also been removed.
5486 56. Added hosts_avoid_esmtp to the smtp transport.
5488 57. The exicyclog script was not checking for the esoteric option
5489 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5490 will work only if exicyclog is run under the appropriate euid.
5492 58. Following a discussion on the list, the rules by which Exim recognises line
5493 endings on incoming messages have been changed. The -dropcr and drop_cr
5494 options are now no-ops, retained only for backwards compatibility. The
5495 following line terminators are recognized: LF CRLF CR. However, special
5496 processing applies to CR:
5498 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5499 nor a local message in the state where . is a terminator.
5501 (ii) If a bare CR is encountered in a header line, an extra space is added
5502 after the line terminator so as not to end the header. The reasoning
5503 behind this is that bare CRs in header lines are most likely either
5504 to be mistakes, or people trying to play silly games.
5506 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5507 was being incorrectly given as 18 bytes larger than it should have been.
5508 This is a VOB (very old bug).
5510 60. This may never have affected anything current, but just in case it has:
5511 When the local host is found other than at the start of a list of hosts,
5512 the local host, those with the same MX, and any that follow, are discarded.
5513 When the list in question was part of a longer list of hosts, the following
5514 hosts (not currently being processed) were also being discarded. This no
5515 longer happens. I'm not sure if this situation could ever has previously
5518 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5521 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5522 header. This is something that is recommended in a new Internet Draft, and
5523 is something that is documented as being done by Sendmail. There are two
5524 possible values. For messages generated by the autoreply transport, Exim
5527 Auto-Submitted: auto-replied
5529 whereas for all other generated messages (e.g. bounces) it adds
5531 Auto-Submitted: auto-generated
5533 63. The "personal" condition in filters now includes a test for the
5534 Auto-Submitted: header. If it contains the string "auto-" the message it
5535 not considered personal.
5537 64. Added rcpt_include_affixes as a generic transport option.
5539 65. Added queue_only_override (default true).
5541 66. Added the syslog_duplication option.
5543 67. If what should have been the first header line of a message consisted of
5544 a space followed by a colon, Exim was mis-interpreting it as a header line.
5545 It isn't of course - it is syntactically invalid and should therefore be
5546 treated as the start of the message body. The misbehaviour could have
5547 caused a number of strange effects, including loss of data in subsequent
5548 header lines, and spool format errors.
5550 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5551 client host had authenticated. This control can now be exercised by an ACL
5552 for more flexibility.
5554 69. By default, callouts do not happen when testing with -bh. There is now a
5555 variant, -bhc, which does actually run the callout code, including
5556 consulting and updating the callout cache.
5558 70. Added support for saslauthd authentication, courtesy of Alexander
5561 71. If statvfs() failed on the spool or log directories while checking their
5562 size for availability, Exim confusingly gave the error "space shortage".
5563 Furthermore, in debugging mode it crashed with a floating point exception.
5564 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5565 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5566 serious problem, Exim now writes to the main and panic logs when this
5567 happens, with details of the failure. It then refuses to accept the
5568 incoming message, giving the message "spool directory problem" or "log
5569 directory problem" with a 421 code for SMTP messages.
5571 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5572 0, 1, and 2 exist, because some OS complain for execs without them (see
5573 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5574 descriptors. However, the code omitted to check that the open succeeded,
5575 causing mysterious errors if for some reason the permissions on /dev/null
5576 got screwed. Now Exim writes a message to the main and panic logs, and
5577 bombs out if it can't open /dev/null.
5579 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5580 interact so that it is all more flexible. It is supposed to remain
5581 backwards compatible. Also added extra_local_interfaces.
5583 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5584 to bomb out with an assertion failure - to the client this appears as a
5585 connection drop. This problem occurs in the part of the code that was taken
5586 from the Samba project. Fortunately, the assertion is in a very simple
5587 function, so I have fixed this by reproducing the function inline in the
5588 one place where it is called, and arranging for authentication to fail
5589 instead of killing the process with assert().
5591 75. The SPA client code was not working when the server requested OEM rather
5592 than Unicode encoding.
5594 76. Added code to make require_files with a specific uid setting more usable in
5595 the case where statting the file as root fails - usually a non-root-mounted
5596 NFS file system. When this happens and the failure is EACCES, Exim now
5597 forks a subprocess and does the per-uid checking as the relevant uid.
5599 77. Added process_log_path.
5601 78. If log_file_path was not explicitly set, a setting of check_log_space or
5602 check_log_inodes was ignored.
5604 79. If a space check for the spool or log partitions fails, the incident is now
5605 logged. Of course, in the latter case the data may get lost...
5607 80. Added the %p formatting code to string_format() so that it can be used to
5608 print addresses in debug_print(). Adjusted all the address printing in the
5609 debugging in store.c to use %p rather than %d.
5611 81. There was a concern that a line of code in smtp_in.c could overflow a
5612 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5613 initially expressed, the concern was not well-founded, because trailing
5614 spaces are removed early. However, if the trailing spaces were followed by
5615 a NULL, they did not get removed, so the overflow was possible. Two fixes
5618 (a) I re-wrote the offending code in a cleaner fashion.
5619 (b) If an incoming SMTP command contains a NULL character, it is rejected
5622 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5623 runs initgroups(), so that if the Exim user is in any additional groups,
5624 they will be used during message reception.
5630 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob