1 Change log file for Exim from version 4.21
2 -------------------------------------------
7 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
9 PP/02 Make -n do something, by making it not do something.
10 When combined with -bP, the name of an option is not output.
12 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
19 PP/01 Handle short writes when writing local log-files.
20 In practice, only affects FreeBSD (8 onwards).
21 Bugzilla 1053, with thanks to Dmitry Isaikin.
23 NM/01 Bugzilla 949 - Documentation tweak
25 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
28 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
30 PP/02 Implemented gsasl authenticator.
32 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
34 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
35 `pkg-config foo` for cflags/libs.
37 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
38 with rest of GSASL and with heimdal_gssapi.
40 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
41 `pkg-config foo` for cflags/libs for the TLS implementation.
43 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
44 properties get this fed in as external SSF. A number of robustness
45 and debugging improvements to the cyrus_sasl authenticator.
47 PP/08 cyrus_sasl server now expands the server_realm option.
49 PP/09 Bugzilla 1214 - Log authentication information in reject log.
50 Patch by Jeremy Harris.
52 PP/10 Added dbmjz lookup type.
54 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
56 PP/12 MAIL args handles TAB as well as SP, for better interop with
57 non-compliant senders.
58 Analysis and variant patch by Todd Lyons.
60 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
61 Bug report from Lars Müller <lars@samba.org> (via SUSE),
62 Patch from Dirk Mueller <dmueller@suse.com>
64 PP/13 tls_peerdn now print-escaped for spool files.
65 Observed some $tls_peerdn in wild which contained \n, which resulted
66 in spool file corruption.
68 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
69 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
70 or write after TLS renegotiation, which otherwise led to messages
73 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
74 as a tracking header (ie: a signed header comes before the signature).
75 Patch from Wolfgang Breyha.
77 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
78 comma-sep list; embedded commas doubled.
80 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
82 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
84 Report and patch from Dmitry Banschikov.
86 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
87 Removed SSL_clear() after SSL_new() which led to protocol negotiation
88 failures. We appear to now support TLS1.1+ with Exim.
90 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
91 lets Exim select keys and certificates based upon TLS SNI from client.
92 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
93 before an outbound SMTP session. New log_selector, +tls_sni.
95 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
96 NULL dereference. Report and patch from Alun Jones.
98 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
99 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
100 Not seeing resolver debug output on NetBSD, but suspect this is a
101 resolver implementation change.
103 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
104 Left warnings. Added "eximon gdb" invocation mode.
106 PP/21 Defaulting "accept_8bitmime" to true, not false.
108 PP/22 Added -bw for inetd wait mode support.
110 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
111 locate the relevant includes and libraries. Made this the default.
113 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
114 Bugzilla 1246, report and most of solution from Tomasz Kusy.
116 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
117 This may cause build issues on older platforms.
119 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
120 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
121 gnutls_require_mac & gnutls_require_protocols (no longer supported).
122 Added SNI support via GnuTLS too.
123 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
125 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
127 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
128 Applied second patch from Janne, implementing suggestion to default
129 multiple-strings-in-record handling to match SPF spec.
131 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
133 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
134 read-only, out of scope).
135 Patch from Wolfgang Breyha, report from Stuart Northfield.
137 PP/29 Fix three issues highlighted by clang analyser static analysis.
138 Only crash-plausible issue would require the Cambridge-specific
139 iplookup router and a misconfiguration.
140 Report from Marcin Mirosław.
142 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
144 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
145 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
146 As part of this, removing so much warning spew let me fix some minor
147 real issues in debug logging.
149 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
150 assignment on my part. Fixed.
152 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
153 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
154 Janne Snabb (who went above and beyond: thank you).
156 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
157 string otherwise requires a connection and a bunch more work and it's
158 relatively easy to get wrong. Should also expose TLS library linkage
161 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
162 64-bit ${eval} (JH/03).
164 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
165 GNU libc to support some of the 64-bit stuff, should not lead to
166 conflicts. Defined before os.h is pulled in, so if a given platform
167 needs to override this, it can.
169 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
170 protection layer was required, which is not implemented.
171 Bugzilla 1254, patch from Wolfgang Breyha.
173 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
174 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
175 tls_dhparam take prime identifiers. Also unbreak combination of
176 OpenSSL+DH_params+TLSSNI.
178 PP/39 Disable SSLv2 by default in OpenSSL support.
184 PP/01 Solaris build fix for Oracle's LDAP libraries.
185 Bugzilla 1109, patch from Stephen Usher.
187 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
189 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
192 TF/02 Fix a couple more cases where we did not log the error message
193 when unlink() failed. See also change 4.74-TF/03.
195 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
196 lock up or crash if it happened to be inside a call to libc when it
197 got a SIGUSR1 from exiwhat.
199 The SIGUSR1 handler appends the current process status to the process
200 log which is later printed by exiwhat. It used to use the general
201 purpose logging code to do this, but several functions it calls are
202 not safe for signals.
204 The new output code in the SIGUSR1 handler is specific to the process
205 log, and simple enough that it's easy to inspect for signal safety.
206 Removing some special cases also simplifies the general logging code.
207 Removing the spurious timestamps from the process log simplifies
210 TF/04 Improved ratelimit ACL condition.
212 The /noupdate option has been deprecated in favour of /readonly which
213 has clearer semantics. The /leaky, /strict, and /readonly update modes
214 are mutually exclusive. The update mode is no longer included in the
215 database key; it just determines when the database is updated. (This
216 means that when you upgrde Exim will forget old rate measurements.)
218 Exim now checks that the per_* options are used with an update mode that
219 makes sense for the current ACL. For example, when Exim is processing a
220 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
221 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
222 must specify per_mail/readonly. If you omit the update mode it defaults to
223 /leaky where that makes sense (as before) or /readonly where required.
225 The /noupdate option is now undocumented but still supported for
226 backwards compatibility. It is equivalent to /readonly except that in
227 ACLs where /readonly is required you may specify /leaky/noupdate or
228 /strict/noupdate which are treated the same as /readonly.
230 A useful new feature is the /count= option. This is a generalization
231 of the per_byte option, so that you can measure the throughput of other
232 aggregate values. For example, the per_byte option is now equivalent
233 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
235 The per_rcpt option has been generalized using the /count= mechanism
236 (though it's more complicated than the per_byte equivalence). When it is
237 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
238 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
239 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
240 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
241 Note that using per_rcpt with a non-readonly update mode in more than
242 one ACL will cause the recipients to be double-counted. (The per_mail
243 and per_byte options don't have this problem.)
245 The handling of very low rates has changed slightly. If the computed rate
246 is less than the event's count (usually one) then this event is the first
247 after a long gap. In this case the rate is set to the same as this event's
248 count, so that the first message of a spam run is counted properly.
250 The major new feature is a mechanism for counting the rate of unique
251 events. The new per_addr option counts the number of different
252 recipients that someone has sent messages to in the last time period. It
253 behaves like per_rcpt if all the recipient addresses are different, but
254 duplicate recipient addresses do not increase the measured rate. Like
255 the /count= option this is a general mechanism, so the per_addr option
256 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
257 example, measure the rate that a client uses different sender addresses
258 with the options per_mail/unique=$sender_address. There are further
259 details in the main documentation.
261 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
263 TF/06 Removed a few PCRE remnants.
265 TF/07 Automatically extract Exim's version number from tags in the git
266 repository when doing development or release builds.
268 PP/02 Raise smtp_cmd_buffer_size to 16kB.
269 Bugzilla 879. Patch from Paul Fisher.
271 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
272 Heavily based on revision 40f9a89a from Simon Arlott's tree.
275 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
277 PP/05 Variable $av_failed, true if the AV scanner deferred.
278 Bugzilla 1078. Patch from John Horne.
280 PP/06 Stop make process more reliably on build failure.
281 Bugzilla 1087. Patch from Heiko Schlittermann.
283 PP/07 Make maildir_use_size_file an _expandable_ boolean.
284 Bugzilla 1089. Patch from Heiko Schlittermann.
286 PP/08 Handle ${run} returning more data than OS pipe buffer size.
287 Bugzilla 1131. Patch from Holger Weiß.
289 PP/09 Handle IPv6 addresses with SPF.
290 Bugzilla 860. Patch from Wolfgang Breyha.
292 PP/10 GnuTLS: support TLS 1.2 & 1.1.
294 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
297 PP/11 match_* no longer expand right-hand-side by default.
298 New compile-time build option, EXPAND_LISTMATCH_RHS.
299 New expansion conditions, "inlist", "inlisti".
301 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
303 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
305 PP/14 fix log_write() format string regression from TF/03.
306 Bugzilla 1152. Patch from Dmitry Isaikin.
312 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
314 PP/02 Harmonised TLS library version reporting; only show if debugging.
315 Layout now matches that introduced for other libraries in 4.74 PP/03.
317 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
319 PP/04 New "dns_use_edns0" global option.
321 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
324 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
325 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
327 TK/01 Updated PolarSSL code to 0.14.2.
328 Bugzilla 1097. Patch from Andreas Metzler.
330 PP/07 Catch divide-by-zero in ${eval:...}.
333 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
336 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
337 format-string attack -- SECURITY: remote arbitrary code execution.
339 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
340 time unintentionally subject to list matching rules, letting the header
341 cause arbitrary Exim lookups (of items which can occur in lists, *not*
342 arbitrary string expansion). This allowed for information disclosure.
344 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
345 INT_MIN/-1 -- value coerced to INT_MAX.
351 NM/01 Workround for PCRE version dependency in version reporting
354 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
355 This fixes portability to compilers other than gcc, notably
356 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
358 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
359 makefiles for portability to HP-UX and POSIX correctness.
361 PP/01 Permit LOOKUP_foo enabling on the make command-line.
362 Also via indented variable definition in the Makefile.
363 (Debugging by Oliver Heesakkers).
365 PP/02 Restore caching of spamd results with expanded spamd_address.
366 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
368 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
369 Improves build reliability. Fix from: Frank Elsner
371 NM/02 Fix wide character breakage in the rfc2047 coding
372 Fixes bug 1064. Patch from Andrey N. Oktyabrski
374 NM/03 Allow underscore in dnslist lookups
375 Fixes bug 1026. Patch from Graeme Fowler
377 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
378 Code patches from Adam Ciarcinski of NetBSD.
380 NM/04 Fixed exiqgrep to cope with mailq missing size issue
383 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
384 is logged, to avoid truncation. Patch from John Horne.
386 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
387 Patch from Jakob Hirsch.
389 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
390 SQL string expansion failure details.
391 Patch from Andrey Oktyabrski.
393 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
394 Patch from Simon Arlott.
396 PP/09 New lookups functionality failed to compile on old gcc which rejects
397 extern declarations in function scope.
398 Patch from Oliver Fleischmann
400 PP/10 Use sig_atomic_t for flags set from signal handlers.
401 Check getgroups() return and improve debugging.
402 Fixed developed for diagnosis in bug 927 (which turned out to be
405 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
406 Patch from Mark Zealey.
408 PP/12 Bugzilla 1056: Improved spamd server selection.
409 Patch from Mark Zealey.
411 PP/13 Bugzilla 1086: Deal with maildir quota file races.
412 Based on patch from Heiko Schlittermann.
414 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
415 Patch from Uwe Doering, sign-off by Michael Haardt.
417 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
418 variable declaration deep within a block. Bug and patch from
421 PP/15 lookups-Makefile IRIX compatibilty coercion.
423 PP/16 Make DISABLE_DKIM build knob functional.
425 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
426 Patch by Simon Arlott
428 TF/03 Fix valgrind.h portability to C89 compilers that do not support
429 variable argument macros. Our copy now differs from upstream.
435 TF/01 Failure to get a lock on a hints database can have serious
436 consequences so log it to the panic log.
438 TF/02 Log LMTP confirmation messages in the same way as SMTP,
439 controlled using the smtp_confirmation log selector.
441 TF/03 Include the error message when we fail to unlink a spool file.
443 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
444 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
445 for maintaining out-of-tree patches for some time.
447 PP/01 Bugzilla 139: Documentation and portability issues.
448 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
449 Handle per-OS dynamic-module compilation flags.
451 PP/02 Let /dev/null have normal permissions.
452 The 4.73 fixes were a little too stringent and complained about the
453 permissions on /dev/null. Exempt it from some checks.
454 Reported by Andreas M. Kirchwitz.
456 PP/03 Report version information for many libraries, including
457 Exim version information for dynamically loaded libraries. Created
458 version.h, now support a version extension string for distributors
459 who patch heavily. Dynamic module ABI change.
461 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
462 privilege escalation vulnerability whereby the Exim run-time user
463 can cause root to append content of the attacker's choosing to
466 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
469 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
470 If dropping privileges for untrusted macros, we disabled normal logging
471 on the basis that it would fail; for the Exim run-time user, this is not
472 the case, and it resulted in successful deliveries going unlogged.
473 Fixed. Reported by Andreas Metzler.
479 PP/01 Date: & Message-Id: revert to normally being appended to a message,
480 only prepend for the Resent-* case. Fixes regression introduced in
481 Exim 4.70 by NM/22 for Bugzilla 607.
483 PP/02 Include check_rfc2047_length in configure.default because we're seeing
484 increasing numbers of administrators be bitten by this.
486 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
488 PP/03 Bugzilla 994: added openssl_options main configuration option.
490 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
492 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
494 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
496 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
497 without a peer certificate, leading to a segfault because of an
498 assumption that peers always have certificates. Be a little more
499 paranoid. Problem reported by Martin Tscholak.
501 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
502 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
503 NB: ClamAV planning to remove STREAM in "middle of 2010".
504 CL also introduces -bmalware, various -d+acl logging additions and
505 more caution in buffer sizes.
507 PP/09 Implemented reverse_ip expansion operator.
509 PP/10 Bugzilla 937: provide a "debug" ACL control.
511 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
513 PP/12 Bugzilla 973: Implement --version.
515 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
517 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
519 PP/15 Bugzilla 816: support multiple condition rules on Routers.
521 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
522 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
523 ignore trailing whitespace.
525 JJ/02 prevent non-panic DKIM error from being sent to paniclog
527 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
530 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
531 Notification from Dr Andrew Aitchison.
533 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
534 ExtendedDetectionInfo response format.
535 Notification from John Horne.
537 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
540 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
541 XSL and documented dependency on system catalogs, with examples of how
544 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
547 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
548 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
549 configuration file which is writeable by the Exim user or group.
551 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
552 of configuration files to cover files specified with the -C option if
553 they are going to be used with root privileges, not just the default
556 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
557 option (effectively making it always true).
559 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
560 files to be used while preserving root privileges.
562 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
563 that rogue child processes cannot use them.
565 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
566 run-time user, instead of root.
568 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
569 Exim run-time user without dropping privileges.
571 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
572 result string, instead of calling string_vformat() twice with the same
575 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
576 for other users. Others should always drop root privileges if they use
577 -C on the command line, even for a whitelisted configure file.
579 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
581 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
587 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
588 $data_path, and $header_path variables; fixed documentation bugs and
591 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
592 exipick to access non-standard spools, including the "frozen" queue
595 NM/01 Bugzilla 965: Support mysql stored procedures.
596 Patch from Alain Williams
598 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
600 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
601 Patch from Andreas Metzler
603 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
604 Patch from Kirill Miazine
606 NM/05 Bugzilla 671: Added umask to procmail example.
608 JJ/03 installed exipick 20100323.0, fixing doc bug
610 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
611 directory. Notification and patch from Dan Rosenberg.
613 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
615 TK/02 Improve log output when DKIM signing operation fails.
617 MH/01 Treat the transport option dkim_domain as a colon separated
618 list, not as a single string, and sign the message with each element,
619 omitting multiple occurences of the same signer.
621 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
622 Bugzilla 985, 986. Patch by Simon Arlott
624 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
625 Patch by Simon Arlott
627 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
628 MBX locking. Notification from Dan Rosenberg.
634 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
636 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
638 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
640 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
642 NM/04 Bugzilla 915: Flag broken perl installation during build.
648 TK/01 Added patch by Johannes Berg that expands the main option
649 "spamd_address" if it starts with a dollar sign.
651 TK/02 Write list of recipients to X-Envelope-Sender header when building
652 the mbox-format spool file for content scanning (suggested by Jakob
655 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
656 (http://www.dcc-servers.net/) support via dccifd. Activated by
657 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
659 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
660 by Mark Daniel Reidel <mr@df.eu>.
662 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
663 When building exim an external PCRE library is now needed -
664 PCRE is a system library on the majority of modern systems.
665 See entry on PCRE_LIBS in EDITME file.
667 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
668 conversation. Added nologin parameter to request.
669 Patch contributed by Kirill Miazine.
671 TF/01 Do not log submission mode rewrites if they do not change the address.
673 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
675 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
676 log files in place. Contributed by Roberto Lima.
678 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
680 TF/03 Bugzilla 615: When checking the local_parts router precondition
681 after a local_part_suffix or local_part_prefix option, Exim now
682 does not use the address's named list lookup cache, since this
683 contains cached lookups for the whole local part.
685 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
686 Robert Millan. Documentation is in experimental-spec.txt.
688 TF/04 Bugzilla 668: Fix parallel build (make -j).
690 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
692 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
693 Patch provided by Jan Srzednicki.
695 TF/05 Leading white space used to be stripped from $spam_report which
696 wrecked the formatting. Now it is preserved.
698 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
699 that they are available at delivery time.
701 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
703 TF/08 TLS error reporting now respects the incoming_interface and
704 incoming_port log selectors.
706 TF/09 Produce a more useful error message if an SMTP transport's hosts
707 setting expands to an empty string.
709 NM/06 Bugzilla 744: EXPN did not work under TLS.
710 Patch provided by Phil Pennock.
712 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
713 Patch provided by Richard Godbee.
715 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
716 acl_smtp_notquit, added index entry.
718 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
719 Patch provided by Eugene Bujak.
721 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
722 accept(). Patch provided by Maxim Dounin.
724 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
725 Patch provided by Phil Pennock.
727 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
729 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
730 Patch provided by Brad "anomie" Jorsch.
732 NM/14 Bugzilla 622: Added timeout setting to transport filter.
733 Patch provided by Dean Brooks.
735 TK/05 Add native DKIM support (does not depend on external libraries).
737 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
738 Patch provided by Graeme Fowler.
740 NM/16 Bugzilla 851: Documentation example syntax fix.
742 NM/17 Changed NOTICE file to remove references to embedded PCRE.
744 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
747 NM/19 Bugzilla 745: TLS version reporting.
748 Patch provided by Phil Pennock.
750 NM/20 Bugzilla 167: bool: condition support.
751 Patch provided by Phil Pennock.
753 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
754 clients. Patch provided by Phil Pennock.
756 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
757 Patch provided by Brad "anomie" Jorsch.
759 NM/23 Bugzilla 687: Fix misparses in eximstats.
760 Patch provided by Heiko Schlittermann.
762 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
763 Patch provided by Heiko Schlittermann.
765 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
766 plus update to original patch.
768 NM/26 Bugzilla 799: Documentation correction for ratelimit.
770 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
771 Patch provided by David Brownlee.
773 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
775 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
777 NM/30 Bugzilla 888: TLS documentation bugfixes.
779 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
781 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
782 Unlike the original bugzilla I have changed all shell scripts in src tree.
784 NM/33 Bugzilla 898: Transport filter timeout fix.
785 Patch by Todd Rinaldo.
787 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
788 Patch by Serge Demonchaux.
790 NM/35 Bugzilla 39: Base64 decode bug fixes.
791 Patch by Jakob Hirsch.
793 NM/36 Bugzilla 909: Correct connect() call in dcc code.
795 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
797 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
799 NM/39 Bugzilla 911: Fixed MakeLinks build script.
805 TK/01 Add preliminary DKIM support. Currently requires a forked version of
806 ALT-N's libdkim that I have put here:
807 http://duncanthrax.net/exim-experimental/
809 Note to Michael Haardt: I had to rename some vars in sieve.c. They
810 were called 'true' and it seems that C99 defines that as a reserved
811 keyword to be used with 'bool' variable types. That means you could
812 not include C99-style headers which use bools without triggering
813 build errors in sieve.c.
815 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
816 as mailq or other aliases. Changed the --help handling significantly
817 to do whats expected. exim_usage() emits usage/help information.
819 SC/01 Added the -bylocaldomain option to eximstats.
821 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
823 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
825 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
831 PH/01 Another patch from the Sieve maintainer.
833 PH/02 When an IPv6 address is converted to a string for single-key lookup
834 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
835 dots are used instead of colons so that keys in lsearch files need not
836 contain colons. This was done some time before quoting was made available
837 in lsearch files. However, iplsearch files do require colons in IPv6 keys
838 (notated using the quote facility) so as to distinguish them from IPv4
839 keys. This meant that lookups for IP addresses in host lists did not work
840 for iplsearch lookups.
842 This has been fixed by arranging for IPv6 addresses to be expressed with
843 colons if the lookup type is iplsearch. This is not incompatible, because
844 previously such lookups could never work.
846 The situation is now rather anomolous, since one *can* have colons in
847 ordinary lsearch keys. However, making the change in all cases is
848 incompatible and would probably break a number of configurations.
850 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
853 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
854 conversion specification without a maximum field width, thereby enabling
855 a rogue spamd server to cause a buffer overflow. While nobody in their
856 right mind would setup Exim to query an untrusted spamd server, an
857 attacker that gains access to a server running spamd could potentially
858 exploit this vulnerability to run arbitrary code as the Exim user.
860 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
861 $primary_hostname instead of what libspf2 thinks the hosts name is.
863 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
864 a directory entry by the name of the lookup key. Previously, if a
865 symlink pointed to a non-existing file or a file in a directory that
866 Exim lacked permissions to read, a lookup for a key matching that
867 symlink would fail. Now it is enough that a matching directory entry
868 exists, symlink or not. (Bugzilla 503.)
870 PH/03 The body_linecount and body_zerocount variables are now exported in the
873 PH/04 Added the $dnslist_matched variable.
875 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
876 This means they are set thereafter only if the connection becomes
879 PH/06 Added the client_condition to authenticators so that some can be skipped
880 by clients under certain conditions.
882 PH/07 The error message for a badly-placed control=no_multiline_responses left
883 "_responses" off the end of the name.
885 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
887 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
888 (without spaces) instead of just copying the configuration text.
890 PH/10 Added the /noupdate option to the ratelimit ACL condition.
892 PH/11 Added $max_received_linelength.
894 PH/12 Added +ignore_defer and +include_defer to host lists.
896 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
897 way in which PCRE > 7.0 is built.
899 PH/14 Implemented queue_only_load_latch.
901 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
902 MAIL command. The effect was to mangle the value on 64-bit systems.
904 PH/16 Another patch from the Sieve maintainer.
906 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
908 PH/18 If a system quota error occurred while trying to create the file for
909 a maildir delivery, the message "Mailbox is full" was not appended to the
910 bounce if the delivery eventually timed out. Change 4.67/27 below applied
911 only to a quota excession during the actual writing of the file.
913 PH/19 It seems that peer DN values may contain newlines (and other non-printing
914 characters?) which causes problems in log lines. The DN values are now
915 passed through string_printing() before being added to log lines.
917 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
918 and InterBase are left for another time.)
920 PH/21 Added message_body_newlines option.
922 PH/22 Guard against possible overflow in moan_check_errorcopy().
924 PH/23 POSIX allows open() to be a macro; guard against that.
926 PH/24 If the recipient of an error message contained an @ in the local part
927 (suitably quoted, of course), incorrect values were put in $domain and
928 $local_part during the evaluation of errors_copy.
934 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
935 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
938 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
939 issue a MAIL command.
941 PH/02 In an ACL statement such as
943 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
945 if a client was not listed at all, or was listed with a value other than
946 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
947 the condition was not true (as it should be), so access was not denied.
948 The bug was that the ! inversion was incorrectly passed on to the second
949 item. This has been fixed.
951 PH/03 Added additional dnslists conditions == and =& which are different from
952 = and & when the dns lookup returns more than one IP address.
954 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
955 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
957 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
958 FSYNC, which compiles an option called disable_fsync that allows for
959 bypassing fsync(). The documentation is heavily laced with warnings.
961 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
963 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
964 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
965 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
966 including adding "make clean"; (3) Added -fPIC when compiling the test
967 dynamically loaded module, to get rid of a warning.
969 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
970 message fails, move_frozen_messages = true and ignore_bounce_errors_after
971 = 0s. The bug is otherwise harmless.
973 PH/07 There was a bug in the dovecot authenticator such that the value of
974 $auth1 could be overwritten, and so not correctly preserved, after a
975 successful authentication. This usually meant that the value preserved by
976 the server_setid option was incorrect.
978 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
980 PH/09 Installed PCRE release 7.0.
982 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
983 run for batched SMTP input. It is now run at the start of every message
984 in the batch. While fixing this I discovered that the process information
985 (output by running exiwhat) was not always getting set for -bs and -bS
986 input. This is fixed, and it now also says "batched" for BSMTP.
988 PH/11 Added control=no_pipelining.
990 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
991 patch, slightly modified), and move the expansion of helo_data till after
992 the connection is made in the smtp transport (so it can use these
995 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
997 PH/14 Added log_selector = +pid.
999 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1001 PH/16 Add ${if forany and ${if forall.
1003 PH/17 Added dsn_from option to vary the From: line in DSNs.
1005 PH/18 Flush SMTP output before performing a callout, unless control =
1006 no_callout_flush is set.
1008 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1009 was true (the default) a successful delivery failed to delete the retry
1010 item, thus causing premature timeout of the address. The bug is now
1013 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1015 PH/21 Long custom messages for fakedefer and fakereject are now split up
1016 into multiline reponses in the same way that messages for "deny" and
1017 other ACL rejections are.
1019 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1020 with slight modification.
1022 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1023 draft, changing the syntax and factoring some duplicate code".
1025 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1026 for deliveries of the second and subsequent messages over the same SMTP
1029 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1030 ${reduce, with only minor "tidies".
1032 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1034 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1035 expansion side effects.
1037 PH/27 When a message times out after an over-quota error from an Exim-imposed
1038 quota, the bounce message says "mailbox is full". This message was not
1039 being given when it was a system quota that was exceeded. It now should
1042 MH/03 Made $recipients available in local_scan(). local_scan() already has
1043 better access to the recipient list through recipients_list[], but
1044 $recipients can be useful in postmaster-provided expansion strings.
1046 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1047 in the case of a MAIL command with additional options following the
1048 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1049 were accidentally chopped off.
1051 PH/29 SMTP synchronization checks are implemented when a command is read -
1052 there is a check that no more input is waiting when there shouldn't be
1053 any. However, for some commands, a delay in an ACL can mean that it is
1054 some time before the response is written. In this time, more input might
1055 arrive, invalidly. So now there are extra checks after an ACL has run for
1056 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1057 pipelining has not been advertised.
1059 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1061 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1062 returned in the SMTP response when smtp_return_error_details was false.
1063 This has been fixed.
1065 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1066 instead of the C I/O that was originally supplied, because problems were
1067 reported on Solaris.
1069 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1070 Exim which did not show up earlier: it was assuming that a call to
1071 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1072 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1073 was a macro that became an assignment, so it seemed to work. This has
1074 changed to a proper function call with a void return, hence the compile
1075 error. Exim's code has been fixed.
1077 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1080 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1082 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1084 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1085 because it turns out to be too big or there is a timeout) there is no
1086 "Completed" line in the log. When some messages of this type were
1087 selected by exigrep, they were listed as "not completed". Others were
1088 picked up by some special patterns. I have improved the selection
1089 criteria to be more general.
1091 PH/38 The host_find_failed option in the manualroute router can now be set
1092 to "ignore", to completely ignore a host whose IP address cannot be
1093 found. If all hosts are ignored, the behaviour is controlled by the new
1094 host_all_ignored option.
1096 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1097 homing or because of multiple MX records with /mx) generated more than
1098 one IP address, and the following item turned out to be the local host,
1099 all the secondary addresses of the first item were incorrectly removed
1100 from the list, along with the local host and any following hosts (which
1101 is what is supposed to happen).
1103 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1104 whoever called Exim into the -H file. In the case of the daemon it was
1105 behaving confusingly. When first started, it used values for whoever
1106 started the daemon, but after a SIGHUP it used the Exim user (because it
1107 calls itself on a restart). I have changed the code so that it now always
1110 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1111 message are rejected with the same error (e.g. no authentication or bad
1112 sender address), and a DATA command is nevertheless sent (as can happen
1113 with PIPELINING or a stupid MUA), the error message that was given to the
1114 RCPT commands is included in the rejection of the DATA command. This is
1115 intended to be helpful for MUAs that show only the final error to their
1118 PH/42 Another patch from the Sieve maintainer.
1120 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1121 Eximstats - Fixed some broken HTML links and added missing column headers
1123 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1124 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1126 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1128 PH/43 Yet another patch from the Sieve maintainer.
1130 PH/44 I found a way to check for a TCP/IP connection going away before sending
1131 the response to the final '.' that terminates a message, but only in the
1132 case where the client has not sent further data following the '.'
1133 (unfortunately, this is allowed). However, in many cases there won't be
1134 any further data because there won't be any more messages to send. A call
1135 to select() can be used: if it shows that the input is "ready", there is
1136 either input waiting, or the socket has been closed. An attempt to read
1137 the next input character can distinguish the two cases. Previously, Exim
1138 would have sent an OK response which the client would never have see.
1139 This could lead to message repetition. This fix should cure that, at
1140 least in a lot of common cases.
1142 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1143 advertised in response to EHLO.
1149 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1150 fixed by 4.65/MH/01 (is this a record?) are fixed:
1152 (i) An empty string was always treated as zero by the numeric comparison
1153 operators. This behaviour has been restored.
1155 (ii) It is documented that the numeric comparison operators always treat
1156 their arguments as decimal numbers. This was broken in that numbers
1157 starting with 0 were being interpreted as octal.
1159 While fixing these problems I realized that there was another issue that
1160 hadn't been noticed. Values of message_size_limit (both the global option
1161 and the transport option) were treated as octal if they started with 0.
1162 The documentation was vague. These values are now always treated as
1163 decimal, and I will make that clear in the documentation.
1169 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1170 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1173 MH/01 Don't check that the operands of numeric comparison operators are
1174 integers when their expansion is in "skipping" mode (fixes bug
1175 introduced by 4.64-PH/07).
1177 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1178 child addresses, Exim now panics and dies. Previously, because the count
1179 is held in a short int, deliveries were likely to be lost. As such a
1180 large number of recipients for a single message is ridiculous
1181 (performance will be very, very poor), I have chosen to impose a limit
1182 rather than extend the field.
1188 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1189 leftover -K file (the existence of which was triggered by #402).
1190 While we were at it, introduced process PID as part of the -K
1191 filename. This should rule out race conditions when creating
1194 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1195 processing considerably. Previous code took too long for large mails,
1196 triggering a timeout which in turn triggers #401.
1198 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1199 in the DK code in transports.c. sendfile() is not really portable,
1200 hence the _LINUX specificness.
1202 TF/01 In the add_headers option to the mail command in an Exim filter,
1203 there was a bug that Exim would claim a syntax error in any
1204 header after the first one which had an odd number of characters
1207 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1208 callout verification, Exim cached a "reject" for the entire domain. This
1209 is correct for most verifications, but it is not correct for a recipient
1210 verification with use_sender or use_postmaster set, because in that case
1211 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1212 case of MAIL FROM:<> rejection from other early rejections (e.g.
1213 rejection of HELO). When verifying a recipient using a non-null MAIL
1214 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1215 Whatever the result of the callout, the value of the domain cache is
1216 left unchanged (for any other kind of callout, getting as far as trying
1217 RCPT means that the domain itself is ok).
1219 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1222 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1223 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1224 session, the daemon ignores ECONNECT errors and logs others; it now
1225 ignores EPIPE as well.
1227 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1228 (quoted-printable decoding).
1230 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1231 later the small subsequent patch to fix an introduced bug.
1233 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1235 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1237 PH/08 An error is now given if message_size_limit is specified negative.
1239 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1240 to be given (somewhat) arbitrary names.
1242 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1245 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1246 miscellaneous code fixes
1248 PH/10 Added the log_reject_target ACL modifier to specify where to log
1251 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1252 hostname. This is wrong, because it relates to the incoming message (and
1253 probably the interface on which it is arriving) and not to the outgoing
1254 callout (which could be using a different interface). This has been
1255 changed to use the value of the helo_data option from the smtp transport
1256 instead - this is what is used when a message is actually being sent. If
1257 there is no remote transport (possible with a router that sets up host
1258 addresses), $smtp_active_hostname is used.
1260 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1261 tweaks were necessary in order to get it to work (see also 21 below):
1262 (a) The code assumed that strncpy() returns a negative number on buffer
1263 overflow, which isn't the case. Replaced with Exim's string_format()
1265 (b) There were several signed/unsigned issues. I just did the minimum
1266 hacking in of casts. There is scope for a larger refactoring.
1267 (c) The code used strcasecmp() which is not a standard C function.
1268 Replaced with Exim's strcmpic() function.
1269 (d) The code set only $1; it now sets $auth1 as well.
1270 (e) A simple test gave the error "authentication client didn't specify
1271 service in request". It would seem that Dovecot has changed its
1272 interface. Fortunately there's a specification; I followed it and
1273 changed what the client sends and it appears to be working now.
1275 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1278 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1279 address A is aliased to B and C, where B exists and C does not. Without
1280 -v the output is "A verified" because verification stops after a
1281 successful redirection if more than one address is generated. However,
1282 with -v the child addresses are also verified. Exim was outputting "A
1283 failed to verify" and then showing the successful verification for C,
1284 with its parentage. It now outputs "B failed to verify", showing B's
1285 parentage before showing the successful verification of C.
1287 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1288 look up a TXT record in a specific list after matching in a combined
1291 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1292 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1293 they consult the DNS. I had assumed they would set it the way they
1294 wanted; and indeed my experiments on Linux seem to show that in some
1295 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1296 To be on the safe side, however, I have now made the interface to
1297 host_find_byname() similar to host_find_bydns(), with an argument
1298 containing the DNS resolver options. The host_find_byname() function now
1299 sets these options at its start, just as host_find_bydns() does. The smtp
1300 transport options dns_qualify_single and dns_search_parents are passed to
1301 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1302 of host_find_byname() use the default settings of RES_DEFNAMES
1303 (qualify_single) but not RES_DNSRCH (search_parents).
1305 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1306 spool_read_header() do less string testing, by means of a preliminary
1307 switch on the second character of optional "-foo" lines. (This is
1308 overdue, caused by the large number of possibilities that now exist.
1309 Originally there were few.) While I was there, I also converted the
1310 str(n)cmp tests so they don't re-test the leading "-" and the first
1311 character, in the hope this might squeeze out yet more improvement.
1313 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1314 flag allowing group syntax was set by the header_syntax check but not
1315 turned off, possible causing trouble later; (2) The flag was not being
1316 set at all for the header_verify test, causing "group"-style headers to
1317 be rejected. I have now set it in this case, and also caused header_
1318 verify to ignore an empty address taken from a group. While doing this, I
1319 came across some other cases where the code for allowing group syntax
1320 while scanning a header line wasn't quite right (mostly, not resetting
1321 the flag correctly in the right place). These bugs could have caused
1322 trouble for malformed header lines. I hope it is now all correct.
1324 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1325 with the "reply" argument non-NULL. The code, however (which originally
1326 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1327 but it didn't always do it. This confused somebody who was copying the
1328 code for some other use. I have removed all the tests.
1330 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1331 feature that was used to support insecure browsers during the U.S. crypto
1332 embargo. It requires special client support, and Exim is probably the
1333 only MTA that supported it -- and would never use it because real RSA is
1334 always available. This code has been removed, because it had the bad
1335 effect of slowing Exim down by computing (never used) parameters for the
1336 RSA_EXPORT functionality.
1338 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1339 authenticator to fail if there's a tab character in the incoming data
1340 (there should never be unless someone is messing about, as it's supposed
1341 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1342 if the connection is using TLS or if the remote IP is the same as the
1343 local IP, and the "valid-client-cert option" if a client certificate has
1346 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1347 authenticators. This can be used for authorization after authentication
1348 succeeds. (In the case of plaintext, it servers for both authentication
1351 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1352 if any retry times were supplied.
1354 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1355 connection, where there is no client IP address to check. In this
1356 situation, the verify now always succeeds.
1358 PH/25 Applied John Jetmore's -Mset patch.
1360 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1362 PH/27 In a string expansion for a processed (not raw) header when multiple
1363 headers of the same name were present, leading whitespace was being
1364 removed from all of them, but trailing whitespace was being removed only
1365 from the last one. Now trailing whitespace is removed from each header
1366 before concatenation. Completely empty headers in a concatenation (as
1367 before) are ignored.
1369 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1370 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1372 PH/29 [Removed. This was a change that I later backed out, and forgot to
1373 correct the ChangeLog entry (that I had efficiently created) before
1374 committing the later change.]
1376 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1377 address errors (4xx response to RCPT) over the same connection as other
1378 messages routed to the same hosts. Such deliveries are always "forced",
1379 so retry times are not inspected. This resulted in far too many retries
1380 for the affected addresses. The effect occurred only when there were more
1381 hosts than the hosts_max_try setting in the smtp transport when it had
1382 the 4xx errors. Those hosts that it had tried were not added to the list
1383 of hosts for which the message was waiting, so if all were tried, there
1384 was no problem. Two fixes have been applied:
1386 (i) If there are any address or message errors in an SMTP delivery, none
1387 of the hosts (tried or untried) are now added to the list of hosts
1388 for which the message is waiting, so the message should not be a
1389 candidate for sending over the same connection that was used for a
1390 successful delivery of some other message. This seems entirely
1391 reasonable: after all the message is NOT "waiting for some host".
1392 This is so "obvious" that I'm not sure why it wasn't done
1393 previously. Hope I haven't missed anything, but it can't do any
1394 harm, as the worst effect is to miss an optimization.
1396 (ii) If, despite (i), such a delivery is accidentally attempted, the
1397 routing retry time is respected, so at least it doesn't keep
1398 hammering the server.
1400 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1401 in ${readsocket because some servers need this prod.
1403 PH/32 Added some extra debug output when updating a wait-xxx database.
1405 PH/33 The hint "could be header name not terminated by colon", which has been
1406 given for certain expansion errors for a long time, was not being given
1407 for the ${if def:h_colon_omitted{... case.
1409 PH/34 The spec says: "With one important exception, whenever a domain list is
1410 being scanned, $domain contains the subject domain." There was at least
1411 one case where this was not true.
1413 PH/35 The error "getsockname() failed: connection reset by peer" was being
1414 written to the panic log as well as the main log, but it isn't really
1415 panic-worthy as it just means the connection died rather early on. I have
1416 removed the panic log writing for the ECONNRESET error when getsockname()
1419 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1420 runs only) independently of the message's sender address. This meant
1421 that, if the 4xx error was in fact related to the sender, a different
1422 message to the same recipient with a different sender could confuse
1423 things. In particualar, this can happen when sending to a greylisting
1424 server, but other circumstances could also provoke similar problems.
1425 I have changed the default so that the retry time for these errors is now
1426 based a combination of the sender and recipient addresses. This change
1427 can be overridden by setting address_retry_include_sender=false in the
1430 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1431 remote server are returned as part of bounce messages. This was not
1432 happening for LMTP over a pipe (the lmtp transport), but now it is the
1433 same for both kinds of LMTP.
1435 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1436 in header lines that were in fact CNAMEs. This is no longer the case.
1438 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1439 and queue runs started by the daemon processed all messages. This has
1440 been fixed so that -R and -S can now usefully be given with -q<time>.
1442 PH/40 Import PCRE release 6.7 (fixes some bugs).
1444 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1446 PH/42 Give an error if -q is specified more than once.
1448 PH/43 Renamed the variables $interface_address and $interface_port as
1449 $received_ip_address and $received_port, to make it clear that these
1450 values apply to message reception, and not to the outgoing interface when
1451 a message is delivered. (The old names remain recognized, of course.)
1453 PH/44 There was no timeout on the connect() call when using a Unix domain
1454 socket in the ${readsocket expansion. There now is.
1456 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1457 be meaningful with "accept".
1459 SC/01 Eximstats V1.43
1460 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1462 SC/02 Eximstats V1.44
1463 Use a glob alias rather than an array ref in the generated
1464 parser. This improves both readability and performance.
1466 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1467 Collect SpamAssassin and rejection statistics.
1468 Don't display local sender or destination tables unless
1469 there is data to show.
1470 Added average volumes into the top table text output.
1472 SC/04 Eximstats V1.46
1473 Collect data on the number of addresses (recipients)
1474 as well as the number of messages.
1476 SC/05 Eximstats V1.47
1477 Added 'Message too big' to the list of mail rejection
1478 reasons (thanks to Marco Gaiarin).
1480 SC/06 Eximstats V1.48
1481 Mainlog lines which have GMT offsets and are too short to
1482 have a flag are now skipped.
1484 SC/07 Eximstats V1.49 (Alain Williams)
1485 Added the -emptyok flag.
1487 SC/08 Eximstats V1.50
1488 Fixes for obtaining the IP address from reject messages.
1490 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1491 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1492 whitesspace changes from 4.64-PH/27
1494 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1497 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1498 are found, allow negative numbers in numeric criteria)
1500 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1502 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1503 to match changes made in 4.64-PH/43
1505 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1507 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1508 "domain" is actually an IP address, and force a failure. This locks out
1509 those revolvers/nameservers that support "A-for-A" lookups, in
1510 contravention of the specifications.
1512 PH/48 When a host name was looked up from an IP address, and the subsequent
1513 forward lookup of the name timed out, the host name was left in
1514 $sender_host_name, contrary to the specification.
1516 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1517 restricted to single-key lookups, Exim was not diagnosing an error if
1518 * or *@ was used with a query-style lookup.
1520 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1522 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1523 long ago, but noone interested enough thought of it. Let's just say that
1524 the "1.1" means that there are some new functions that weren't there at
1525 some point in the past.
1527 PH/51 Error processing for expansion failure of helo_data from an smtp
1528 transport during callout processing was broken.
1530 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1531 tested/used via the -bh/-bhc/-bs options.
1533 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1534 bug, fixed in subsequent PCRE releases).
1536 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1537 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1539 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1545 SC/01 Use a glob alias rather than an array ref in eximstats generated
1546 parser. This improves both readability and performance.
1548 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1549 Don't display local sender or destination tables in eximstats unless
1550 there is data to show.
1551 Added average volumes into the eximstats top table text output.
1553 SC/03 Collect data on the number of addresses (recipients) as well
1554 as the number of messages in eximstats.
1556 TF/01 Correct an error in the documentation for the redirect router. Exim
1557 does (usually) call initgroups() when daemonizing.
1559 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1560 with consistent privilege compared to when running as a daemon.
1562 TF/03 Note in the spec that $authenticated_id is not set for local
1563 submissions from trusted users.
1565 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1566 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1568 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1569 by adding some example configuration directives to the default
1570 configuration file. A little bit of work is required to uncomment the
1571 directives and define how usernames and passwords are checked, but
1572 there is now a framework to start from.
1574 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1575 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1576 without this. I don't know how relevant this is to other LDAP libraries.
1578 PH/02 Add the verb name to the "unknown ACL verb" error.
1580 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1582 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1584 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1585 directory not expanded when it should be if an expanded home directory
1586 was set for the address (which is overridden by the transport).
1588 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1591 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1592 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1593 because it is too late at that time, and has no effect.
1595 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1596 security issue with \' (bugzilla #107). I could not use the
1597 PQescapeStringConn() function, because it needs a PGconn value as one of
1600 PH/08 When testing addresses using -bt, indicate those final addresses that
1601 are duplicates that would not cause an additional delivery. At least one
1602 person was confused, thinking that -bt output corresponded to deliveries.
1603 (Suppressing duplicates isn't a good idea as you lose the information
1604 about possibly different redirections that led to the duplicates.)
1606 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1607 systems where poll() doesn't work, in particular OS X.
1609 PH/10 Added more information to debugging output for retry time not reached.
1611 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1612 operations in malware.c.
1614 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1617 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1618 syslog_duplication set false, log lines that would normally be written
1619 both the the main log and to the reject log were not written to syslog at
1622 PH/14 In the default configuration, change the use of "message" in ACL warn
1623 statements to "add_header".
1625 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1626 not followed by a command (e.g. "seen endif").
1628 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1629 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1632 PH/17 Added extra conditions to the default value of delay_warning_condition
1636 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1637 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1638 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1641 The Auto-Submitted: and various List- headers are standardised, whereas I
1642 don't think Precedence: ever was.
1644 PH/18 Refactored debugging code in route_finduser() to show more information,
1645 in particular, the error code if getpwnam() issues one.
1647 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1648 This is apparently needed in addition to the PH/07 change above to avoid
1649 any possible encoding problems.
1651 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1652 but not after initializing Perl.
1654 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1655 output them only if debugging. By default they are written stderr,
1656 apparently, which is not desirable.
1658 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1661 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1664 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1666 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1667 authenticated or an ident call has been made. Suppress the default
1668 values for $authenticated_id and $authenticated_sender (but permit -oMai
1669 and -oMas) when testing with -bh.
1671 PH/24 Re-jigged the order of the tests in the default configuration so that the
1672 tests for valid domains and recipients precede the DNS black list and CSA
1673 tests, on the grounds that those ones are more expensive.
1675 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1676 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1677 This bug exists in every version of Exim that I still have, right back to
1680 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1681 However, an attempt to turn on case-sensitivity in a regex key by
1682 including (?-i) didn't work because the subject string was already
1683 lowercased, and the effects were non-intuitive. It turns out that a
1684 one-line patch can be used to allow (?-i) to work as expected.
1690 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1691 other effects) broke the use of negated acl sub-conditions.
1693 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1696 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1697 "Deny" causes Exim to reject the incoming connection with a 554 error.
1698 Unfortunately, if there is a major crisis, such as a disk failure,
1699 tcp-wrappers gives "deny", whereas what one would like would be some
1700 kind of temporary error. A kludge has been added to help with this.
1701 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1702 554 error is used if errno is still zero or contains ENOENT (which occurs
1703 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1706 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1708 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1709 errors. Otherwise a message that provokes a temporary error (when other
1710 messages do not) can cause a whole host to time out.
1712 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1713 addresses were routed directly to files or pipes from a redirect router.
1714 File deliveries just didn't batch; pipe deliveries might have suffered
1717 PH/06 A failure to get a lock for a hints database would erroneously always say
1718 "Failed to get write lock", even when it was really a read lock.
1720 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1721 of 0600. This has been changed to use the value of the lockfile_mode
1722 option (which defaults to 0600).
1724 PH/08 Applied small patch from the Sieve maintainer.
1726 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1727 folder from quota calculations, a direct delivery into this folder messed
1728 up the contents of the maildirsize file. This was because the regex was
1729 used only to exclude .Trash (or whatever) when the size of the mailbox
1730 was calculated. There was no check that a delivery was happening into an
1731 excluded directory. This bug has been fixed by ignoring all quota
1732 processing for deliveries into excluded directories.
1734 PH/10 Added the maildirfolder_create_regex option to appendfile.
1740 PH/01 The code for finding all the local interface addresses on a FreeBSD
1741 system running IPv6 was broken. This may well have applied to all BSD
1742 systems, as well as to others that have similar system calls. The broken
1743 code found IPv4 interfaces correctly, but gave incorrect values for the
1744 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1745 that it would not match correctly against @[] and not recognize the IPv6
1748 PH/02 The ipliteral router was not recognizing addresses of the form user@
1749 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1751 PH/03 Added disable_ipv6.
1753 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1754 decoded form, because it is most often used to construct To: headers
1755 lines in autoreplies, and the decoded form may well be syntactically
1756 invalid. However, $reply_address has leading white space removed, and all
1757 newlines turned into spaces so that the autoreply transport does not
1760 PH/05 If group was specified without a user on a router, and no group or user
1761 was specified on a transport, the group from the router was ignored.
1763 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1764 for visible compile-time settings that can be used to change these
1765 numbers, for those that want even more. Backwards compatibility with old
1766 spool files has been maintained. However, going back to a previous Exim
1767 release will lost any variables that are in spool files.
1769 PH/07 Two small changes when running in the test harness: increase delay when
1770 passing a TCP/IP connection to a new process, in case the original
1771 process has to generate a bounce, and remove special handling of
1772 127.0.0.2 (sic), which is no longer necessary.
1774 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1775 be the same on different OS.
1777 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1780 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1781 whether --show-vars was specified or not
1783 JJ/02 exipick: Added support for new ACL variable spool format introduced
1786 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1787 syntactically invalid From: or Reply-to: line, and a filter used this to
1788 generate an autoreply, and therefore failed to obtain an address for the
1789 autoreply, Exim could try to deliver to a non-existent relative file
1790 name, causing unrelated and misleading errors. What now happens is that
1791 it logs this as a hard delivery error, but does not attempt to create a
1794 PH/11 The exinext utility has a -C option for testing purposes, but although
1795 the given file was scanned by exinext itself; it wasn't being passed on
1796 when Exim was called.
1798 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1799 an end-of-file indication when reading a command response.
1801 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1802 compiled. In many other places in Exim, IPv6 addresses are always
1803 recognized, so I have changed this. It also means that IPv4 domain
1804 literals of the form [IPV4:n.n.n.n] are now always recognized.
1806 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1807 used if the router is not running as root, for example, when verifying at
1808 ACL time, or when using -bh. The debugging output from this situation was
1809 non-existent - all you got was a failure to exec. I have made two
1812 (a) Failures to set uid/gid, the current directory, or a process leader
1813 in a subprocess such as that created by queryprogram now generate
1814 suitable debugging ouput when -d is set.
1816 (b) The queryprogram router detects when it is not running as root,
1817 outputs suitable debugging information if -d is set, and then runs
1818 the subprocess without attempting to change uid/gid.
1820 PH/15 Minor change to Makefile for building test_host (undocumented testing
1823 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1824 additional section of a DNS packet that returns MX or SRV records.
1825 Instead, it always explicitly searches for A/AAAA records. This avoids
1826 major problems that occur when a DNS server includes only records of one
1827 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1828 fixed another bug: if SRV records were looked up and the corresponding
1829 address records were *not* found in the additional section, the port
1830 values from the SRV records were lost.
1832 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1833 using the correct key (the original address) when searching the retry
1834 rules in order to find which one to use for generating the retry hint.
1836 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1837 adding the default one. Similarly, if it contains a Reply-To: header, the
1838 errors_reply_to option, if set, is not used.
1840 PH/19 When calculating a retry time, Exim used to measure the "time since
1841 failure" by looking at the "first failed" field in the retry record. Now
1842 it does not use this if it is later than than the arrival time of the
1843 message. Instead it uses the arrival time. This makes for better
1844 behaviour in cases where some deliveries succeed, thus re-setting the
1845 "first failed" field. An example is a quota failure for a huge message
1846 when small messages continue to be delivered. Without this change, the
1847 "time since failure" will always be short, possible causing more frequent
1848 delivery attempts for the huge message than are intended.
1849 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1851 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1852 $1, $2, $3) because the numerical variables can be reset during some
1853 expansion items (e.g. "match"), thereby losing the authentication data.
1855 PH/21 Make -bV show the size of off_t variables so that the test suite can
1856 decide whether to run tests for quotas > 2G.
1858 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1859 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1860 filecount value is greater than 2G or if a quota value is greater than 2G
1861 on a system where the size of off_t is not greater than 4, a panic error
1864 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1865 never match. The debug and -bh output now contains an explicit error
1866 message indicating a malformed IPv4 address or mask.
1868 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1869 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1870 PH/23 above applies.
1872 PH/25 Do not write to syslog when running in the test harness. The only
1873 occasion when this arises is a failure to open the main or panic logs
1874 (for which there is an explicit test).
1876 PH/26 Added the /no_tell option to "control=freeze".
1878 PH/27 If a host name lookup failed very early in a connection, for example, if
1879 the IP address matched host_lookup and the reverse lookup yielded a name
1880 that did not have a forward lookup, an error message of the form "no IP
1881 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1882 could be logged. Now it outputs the IP address instead of "NULL".
1884 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1885 allows the sender and the authenticated sender to be set when
1886 submitting a message from within Exim. Since child_open_exim() is
1887 documented for local_scan(), the new function should be too.
1889 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1890 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1891 results in an empty string is now treated as unset.
1893 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1895 PH/31 Added sender_verify_fail logging option.
1897 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1898 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1899 tidied the source and removed it altogether.
1901 PH/33 When a queue run was abandoned because the load average was too high, a
1902 log line was always written; now it is written only if the queue_run log
1903 selector is set. In addition, the log line for abandonment now contains
1904 information about the queue run such as the pid. This is always present
1905 in "start" and "stop" lines but was omitted from the "abandon" line.
1907 PH/34 Omit spaces between a header name and the colon in the error message that
1908 is given when verify = headers_syntax fails (if there are lots of them,
1909 the message gets confusing).
1911 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1912 names, as there are now some PTR records that contain slashes. This check
1913 is only to protect against broken name servers that fall over on strange
1914 characters, so the fact that it applies to all lookups doesn't matter.
1916 PH/36 Now that the new test suite is complete, we can remove some of the
1917 special code in Exim that was needed for the old test suite. For example,
1918 sorting DNS records because real resolvers return them in an arbitrary
1919 order. The new test suite's fake resolver always returns records in the
1922 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1923 bounces) except when queue_only is set, to avoid logging races between
1924 the different processes.
1926 PH/38 Panic-die if .include specifies a non-absolute path.
1928 PH/39 A tweak to the "H" retry rule from its user.
1930 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1931 a label. They prevented compilation on older perls.
1933 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1934 a warning to be raised on newish perls.
1936 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1937 on queue. Changes to match documented behaviour of showing count of
1938 messages matching specified criteria.
1940 PH/40 Changed the default ident timeout from 30s to 5s.
1942 PH/41 Added support for the use of login_cap features, on those BSD systems
1943 that have them, for controlling the resources used by pipe deliveries.
1945 PH/42 The content-scanning code uses fopen() to create files in which to put
1946 message data. Previously it was not paying any attention to the mode of
1947 the files. Exim runs with umask(0) because the rest of the code creates
1948 files with open(), and sets the required mode explicitly. Thus, these
1949 files were ending up world-writeable. This was not a big issue, because,
1950 being within the spool directory, they were not world-accessible. I have
1951 created a function called modefopen, which takes an additional mode
1952 argument. It sets umask(777), creates the file, chmods it to the required
1953 mode, then resets the umask. All the relevant calls to fopen() in the
1954 content scanning code have been changed to use this function.
1956 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1957 to 24 hours. This avoids potential overflow problems when processing G
1958 and H retry rules. I suspect nobody ever tinkers with this value.
1960 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1962 PH/45 When the plaintext authenticator is running as a client, the server's
1963 challenges are checked to ensure they are valid base64 strings. By
1964 default, the authentication attempt is cancelled if an invalid string is
1965 received. Setting client_ignore_invalid_base64 true ignores these errors.
1966 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1967 they are received. Thus, the responses can be made to depend on the
1968 challenges. If an invalid string is ignored, an empty string is placed in
1971 PH/46 Messages that are created by the autoreply transport now contains a
1972 References: header, in accordance with RFCs 2822 and 3834.
1974 PH/47 Added authenticated_sender_force to the smtp transport.
1976 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1978 PH/49 Installed latest patch from the Sieve maintainer.
1980 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1981 was also set, the appendfile transport was unnecessarily scanning a
1982 directory of message files (e.g. for maildir delivery) to find the count
1983 of files (along with the size), even though it did not need this
1984 information. It now does the scan only if it needs to find either the
1985 size of the count of files.
1987 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1989 PH/52 Two bugs concerned with error handling when the smtp transport is
1992 (i) Exim was not creating retry information for temporary errors given
1993 for individual recipients after the DATA command when the smtp transport
1994 was used in LMTP mode. This meant that they could be retried too
1995 frequently, and not timed out correctly.
1997 (ii) Exim was setting the flag that allows error details to be returned
1998 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1999 recipients that were returned after the DATA command.
2001 PH/53 This is related to PH/52, but is more general: for any failing address,
2002 when detailed error information was permitted to be returned to the
2003 sender, but the error was temporary, then after the final timeout, only
2004 "retry timeout exceeded" was returned. Now it returns the full error as
2005 well as "retry timeout exceeded".
2007 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2008 do this, and (what is worse) MTAs that accept it.
2010 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2011 will now be deprecated.
2013 PH/56 New os.c-cygwin from the Cygwin maintainer.
2015 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2016 formats (previously only available in exim formats via -bpr, -bpru,
2017 and -bpra. Now also available in native and exiqgrep formats)
2019 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2020 with very large, slow to parse queues
2022 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2024 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2026 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2027 responses to authentication challenges, though it was showing the
2028 challenges; (ii) I've removed the CR characters from the debug output for
2031 PH/58 Allow for the insertion of a newline as well as a space when a string
2032 is turned into more than one encoded-word during RFC 2047 encoding. The
2033 Sieve code now uses this.
2035 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2036 data_4xx, lost_connection, tls_required.
2038 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2039 message was being sent as an SMTP response.
2041 PH/61 Add -l and -k options to exicyclog.
2043 PH/62 When verifying, if an address was redirected to one new address, so that
2044 verification continued, and the new address failed or deferred after
2045 having set something in $address_data, the value of $address_data was not
2046 passed back to the ACL. This was different to the case when no
2047 redirection occurred. The value is now passed back in both cases.
2049 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2050 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2051 use login_cap.h, so on its own it isn't the distinguishing feature. The
2052 new name refers directly to the setclassresources() function.
2054 PH/65 Added configuration files for NetBSD3.
2056 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2058 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2059 is preferred over IPv4.
2061 PH/68 The bounce_return_message and bounce_return_body options were not being
2062 honoured for bounces generated during the reception of non-SMTP messages.
2063 In particular, this applied to messages rejected by the ACL. This bug has
2064 been fixed. However, if bounce_return_message is true and bounce_return_
2065 body is false, the headers that are returned for a non-SMTP message
2066 include only those that have been read before the error was detected.
2067 (In the case of an ACL rejection, they have all been read.)
2069 PH/69 The HTML version of the specification is now built in a directory called
2070 spec_html instead of spec.html, because the latter looks like a path with
2071 a MIME-type, and this confuses some software.
2073 PH/70 Catch two compiler warnings in sieve.c.
2075 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2076 function verify_get_ident() calls ip_connect() to connect a socket, but
2077 if the "connect()" function timed out, ip_connect() used to close the
2078 socket. However, verify_get_ident() also closes the socket later, and in
2079 between Exim writes to the log, which may get opened at this point. When
2080 the socket was closed in ip_connect(), the log could get the same file
2081 descriptor number as the socket. This naturally causes chaos. The fix is
2082 not to close the socket in ip_connect(); the socket should be closed by
2083 the function that creates it. There was only one place in the code where
2084 this was missing, in the iplookup router, which I don't think anybody now
2085 uses, but I've fixed it anyway.
2087 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2088 well as to direct DNS lookups. Otherwise the handling of names in host
2089 lists is inconsistent and therefore confusing.
2095 PH/01 Two changes to the default runtime configuration:
2097 (1) Move the checks for relay_from_hosts and authenticated clients from
2098 after to before the (commented out) DNS black list checks.
2100 (2) Add control=submission to the relay_from_hosts and authenticated
2101 clients checks, on the grounds that messages accepted by these
2102 statements are most likely to be submissions.
2104 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2106 (1) Generate an error if the third argument for the ${prvs expansion is
2109 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2112 (3) Reset the variables that are obtained from the first argument of
2113 ${prvscheck and used in the second argument before leaving the code,
2114 because their memory is reclaimed, so using them afterwards may do
2117 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2118 one (it's much easier than Tom thought :-).
2120 (5) Because of (4), we can now allow for the use of $prvscheck_result
2121 inside the third argument.
2123 PH/03 For some reason, the default setting of PATH when running a command from
2124 a pipe transport was just "/usr/bin". I have changed it to
2127 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2128 anything to be listed in the output from -bV.
2130 PH/05 When a filter generated an autoreply, the entire To: header line was
2131 quoted in the delivery log line, like this:
2133 => >A.N.Other <ano@some.domain> <original@ddress> ...
2135 This has been changed so that it extracts the operative address. There
2136 may be more than one such address. If so, they are comma-separated, like
2139 => >ano@some.domain,ona@other.domain <original@ddress> ...
2141 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2142 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2143 not being looked up in the rDNS to get a host name, Exim was showing the
2144 IP address twice in Received: lines, even though the IP addresses were
2145 identical. For example:
2147 Received: from [1.2.3.4] (helo=[1.2.3.4])
2149 However, if the real host name was known, it was omitting the HELO data
2150 if it matched the actual IP address. This has been tidied up so that it
2151 doesn't show the same IP address twice.
2153 PH/07 When both +timestamp and +memory debugging was on, the value given by
2154 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2155 called by the debug printing, thereby overwriting the timestamp buffer.
2156 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2158 PH/08 When the original message was included in an autoreply transport, it
2159 always said "this is a copy of the message, including all the headers",
2160 even if body_only or headers_only was set. It now gives an appropriate
2163 PH/09 Applied a patch from the Sieve maintainer which:
2165 o fixes some comments
2166 o adds the (disabled) notify extension core
2167 o adds some debug output for the result of if/elsif tests
2168 o points to the current vacation draft in the documentation
2169 and documents the missing references header update
2173 o fixes a bug in processing the envelope test (when testing
2174 multiple envelope elements, the last element determinted the
2177 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2178 Electronic Mail") by including:
2180 Auto-submitted: auto-generated
2182 in the messages that it generates (bounce messages and others, such as
2183 warnings). In the case of bounce messages for non-SMTP mesages, there was
2184 also a typo: it was using "Auto_submitted" (underscore instead of
2185 hyphen). Since every message generated by Exim is necessarily in response
2186 to another message, thes have all been changed to:
2188 Auto-Submitted: auto-replied
2190 in accordance with these statements in the RFC:
2192 The auto-replied keyword:
2194 - SHOULD be used on messages sent in direct response to another
2195 message by an automatic process,
2197 - MUST NOT be used on manually-generated messages,
2199 - MAY be used on Delivery Status Notifications (DSNs) and Message
2200 Disposition Notifications (MDNs),
2202 - MUST NOT be used on messages generated by automatic or periodic
2203 processes, except for messages which are automatic responses to
2206 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2207 to the default Received: header definition.
2209 PH/12 Added log selector acl_warn_skipped (default on).
2211 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2212 variables because (a) they are in the wrong storage pool and (b) even if
2213 they were copied, it wouldn't work properly because of the caching.
2215 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2216 checking when decoding. Apparently there are clients that generate
2217 overlong encoded strings. Why am I not surprised?
2219 PH/15 If the first argument of "${if match_address" was not empty, but did not
2220 contain an "@" character, Exim crashed. Now it writes a panic log message
2221 and treats the condition as false.
2223 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2225 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2226 extension "envelope-auth". The code is finished and in agreement with
2227 other implementations, but there is no documentation so far and in fact,
2228 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2229 not changing the active code.
2231 Print executed "if" and "elsif" statements when debugging is used. This
2232 helps a great deal to understand what a filter does.
2234 Document more things not specified clearly in RFC3028. I had all this
2235 sorted out, when out of a sudden new issues came to my mind. Oops."
2237 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2240 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2241 canonical form (as documented). However, after a host name lookup from
2242 the IP address, check_host() was doing a simple string comparison with
2243 addresses acquired from the DNS when checking that the found name did
2244 have the original IP as one of its addresses. Since any found IPv6
2245 addresses are likely to be in abbreviated form, the comparison could
2246 fail. Luckily, there already exists a function for doing the comparison
2247 by converting both addresses to binary, so now that is used instead of
2248 the text comparison.
2250 PH/20 There was another similar case to PH/19, when a complete host name was
2251 given in a host list; looking up its IP address could give an abbreviated
2252 form, whereas the current host's name might or might not be abbreviated.
2253 The same fix has been applied.
2259 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2260 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2263 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2264 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2266 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2268 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2269 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2270 Also, for "Auto-Submitted", treat anything other than "no" as
2271 non-personal, in accordance with RFC 3834. (Previously it treated
2272 anything starting "auto-" as non-personal.)
2274 TF/01 The control=submission/name=... option had a problem with syntax
2275 errors if the name included a slash character. The /name= option
2276 now slurps the rest of the string, so it can include any characters
2277 but it must come last in the list of options (after /sender_retain
2280 PH/05 Some modifications to the interface to the fake nameserver for the new
2288 TK/01 Added the "success_on_redirect" address verification option. See
2289 NewStuff for rationale and an example.
2291 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2293 PH/02 Patch to exigrep to allow it to work on syslog lines.
2295 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2296 fread() to skip over the body file's header line, because in Cygwin the
2297 header line is locked and is inaccessible.
2299 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2300 co-exist for some time) to make it clear that it is the Exim ID that is
2301 referenced, not the Message-ID: header line.
2303 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2304 string_format() function, because snprintf() does not exist on all
2307 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2308 ${stat: expansion item.
2310 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2311 protocol synchronization error", to keep the pedants happy.
2313 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2314 well as for IRIX systems, when gcc is being used. See the host.c source
2317 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2319 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2322 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2323 transport and to the smtp transport in LMTP mode.
2325 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2327 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2328 run a filter in a subprocess. This could lead to confusion in subsequent
2329 lookups in the parent process. There should also be a search_tidyup() at
2330 the end of the subprocess.
2332 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2333 only if the host matched helo_try_verify_hosts, which caused the
2334 verification to occur when the EHLO/HELO command was issued. The ACL just
2335 tested the remembered result. Now, if a previous verification attempt has
2336 not happened, "verify = helo" does it there and then.
2338 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2340 TK/03 Fix log output including CR from clamd.
2342 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2343 exist provoked a memory error which could cause a segfault.
2345 PH/15 Installed PCRE 6.2
2347 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2349 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2350 of the problem. Specifically, suggested +O2 rather than +O1 for the
2353 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2355 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2356 record, the port was not correctly logged when the outgoing_port log
2357 selector was set (it logged the transort's default port).
2359 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2360 fallback_hosts, and "hosts" in the smtp transport.
2362 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2363 host errors such as "Connection refused".
2365 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2366 authentication with radiusclient 0.4.9:
2368 - Error returned from rc_read_config was caught wrongly
2369 - Username/password not passed on to radius server due to wrong length.
2371 The presumption is that some radiusclient API changes for 4.51/PH/17
2372 were not taken care of correctly. The code is still untested by me (my
2373 Linux distribution still has 0.3.2 of radiusclient), but it was
2374 contributed by a Radius user.
2376 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2377 expanding the "port" option of the smtp transport.
2379 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2380 while reading a MIME header. Thanks to Tom Hughes for a patch.
2382 PH/24 Include config.h inside local_scan.h so that configuration settings are
2385 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2386 that in an ACL for RCPT (for example), you can examine exactly what was
2389 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2390 commands, but it was not correctly comparing the address with the actual
2391 client host address. Thus, it would show the EHLO address in Received:
2392 header lines when this was not necessary.
2394 PH/27 Added the % operator to ${eval:}.
2396 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2397 it should be ignoring failures (because with -C, for example, it has lost
2398 privilege). It wasn't ignoring creation failures other than "already
2401 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2404 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2405 because an input line was too long, either on its own, or by virtue of
2406 too many continuations, the temporary file was not being removed, and the
2407 return code was incorrect.
2409 PH/31 Missing "BOOL" in function definition in filtertest.c.
2411 PH/32 Applied Sieve patches from the maintainer.
2413 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2415 PH/33 Added "verify = not_blind".
2417 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2418 Local/Makefile (with some defaults set). These are used in built scripts
2419 such as exicyclog, but they have never been used in the exim_install
2420 script (though there are many overriding facilities there). I have
2421 arranged that the exim_install script now takes note of these two
2424 PH/35 Installed configuration files for Dragonfly.
2426 PH/36 When a locally submitted message by a trusted user did not contain a
2427 From: header, and the sender address was obtained from -f or from an SMTP
2428 MAIL command, and the trusted user did not use -F to supply a sender
2429 name, $originator_name was incorrectly used when constructing a From:
2430 header. Furthermore, $originator_name was used for submission mode
2431 messages from external hosts without From: headers in a similar way,
2432 which is clearly wrong.
2434 PH/37 Added control=suppress_local_fixups.
2436 PH/38 When log_selector = +received_sender was set, and the addition of the
2437 sender made the log line's construction buffer exactly full, or one byte
2438 less than full, an overflow happened when the terminating "\n" was
2441 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2442 when the result of a list match is failure because a DNS lookup failed.
2444 PH/40 RM_COMMAND is now used in the building process.
2446 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2447 the "build-* directories that it finds.
2449 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2450 address in a domain literal was a prefix of an interface address.
2452 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2453 when verifying a sender address, unless rewrite_headers is false.
2455 PH/44 Wrote a long comment about why errors_to addresses are verified as
2456 recipients, not senders.
2458 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2459 the ratelimit ACL was added.
2461 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2463 PH/46 Added extra information about PostgreSQL errors to the error string.
2465 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2466 avoiding the need to install special zones in a real server. This is
2467 backwards compatible; if it can't find the fake resolver, it drops back.
2468 Thus, both old and new test suites can be run.
2470 TF/02 Added util/ratelimit.pl
2472 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2473 clock is set back in time.
2475 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2476 Candler <B.Candler@pobox.com>.
2478 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2479 OK for addresses that are the result of redirections.
2481 PH/48 A number of further additions for the benefit of the new test suite,
2482 including a fake gethostbyname() that interfaces to the fake DNS resolver
2485 TF/06 The fix for widen_domains has also been applied to qualify_single and
2486 search_parents which are the other dnslookup options that can cause
2489 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2492 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2494 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2495 service" if it encountered an MX record with an empty target hostname.
2496 The message is now "an MX or SRV record indicated no SMTP service".
2498 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2499 if the DNS of the sending site is misconfigured. This is quite a
2500 common situation. This change restores the behaviour of treating a
2501 helo verification defer as a failure.
2503 PH/51 If self=fail was set on a router, the bounce message did not include the
2504 actual error message.
2510 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2512 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2513 command itself ended in error, the underlying message about the transport
2514 filter timeout was being overwritten with the pipe command error. Now the
2515 underlying error message should be appended to the second error message.
2517 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2519 PH/02 Reduce the amount of output that "make" produces by default. Full output
2520 can still be requested.
2522 PH/03 The warning log line about a condition test deferring for a "warn" verb
2523 was being output only once per connection, rather than after each
2524 occurrence (because it was using the same function as for successful
2525 "warn" verbs). This seems wrong, so I have changed it.
2527 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2528 it should not have, which might have caused a crash in the right
2529 circumstances, but probably never did.
2531 PH/04 Installed a modified version of Tony Finch's patch to make submission
2532 mode fix the return path as well as the Sender: header line, and to
2533 add a /name= option so that you can make the user's friendly name appear
2536 TF/03 Added the control = fakedefer ACL modifier.
2538 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2539 Mark Lowes for thorough testing.
2541 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2543 TK/03 Merged latest SRS patch from Miles Wilton.
2545 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2546 with the definition in sysexits.h (which is #included earlier).
2547 Fortunately, Exim does not actually use EX_OK. The code used to try to
2548 preserve the sysexits.h value, by assumimg that macro definitions were
2549 scanned for macro replacements. I have been disabused of this notion,
2550 so now the code just undefines EX_OK before #including unistd.h.
2552 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2553 in the smtp transport. When a block could not be written in a single
2554 write() function, the timeout was being re-applied to each part-write.
2555 This seems wrong - if the receiver was accepting one byte at a time it
2556 would take for ever. The timeout is now adjusted when this happens. It
2557 doesn't have to be particularly precise.
2559 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2560 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2562 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2563 without a domain if the check to <postmaster@domain> fails.
2565 SC/01 Eximstats: added -xls and the ability to specify output files
2566 (patch written by Frank Heydlauf).
2568 SC/02 Eximstats: use FileHandles for outputing results.
2570 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2572 SC/04 Eximstats: fixed display of large numbers with -nvr option
2574 SC/05 Eximstats: fixed merging of reports with empty tables.
2576 SC/06 Eximstats: added the -include_original_destination flag
2578 SC/07 Eximstats: removed tabs and trailing whitespace.
2580 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2582 TK/06 MBOX spool code: Add real "From " MBOX separator line
2583 so the .eml file is really in mbox format (even though
2584 most programs do not really care). Patch from Alex Miller.
2586 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2587 The latter is generated from $received_to and is only set if the
2588 message has one envelope recipient. SA can use these headers,
2589 obviously out-of-the-box. Patch from Alex Miller.
2591 PH/08 The ${def test on a variable was returning false if the variable's
2592 value was "0", contrary to what the specification has always said!
2593 The result should be true unless the variable is empty.
2595 PH/09 The syntax error of a character other than { following "${if
2596 def:variable_name" (after optional whitespace) was not being diagnosed.
2597 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2598 accidental colon was present, for example, could give incorrect results.
2600 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2601 result is used (not including appendfile, where other changes are about
2604 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2605 This involved changing a lot of size variables from int to off_t. It
2606 should work with maildirs and everything.
2608 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2609 spamd dying while we are connected to it.
2611 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2614 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2615 function for BDB 4.3.
2617 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2619 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2620 the sources for PCRE have been re-arranged and more files are now
2623 PH/15 The code I had for printing potentially long long variables in PH/11
2624 above was not the best (it lost precision). The length of off_t variables
2625 is now inspected at build time, and an appropriate printing format (%ld
2626 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2627 to be "long long int" or "long int". This is needed for the internal
2628 formatting function string_vformat().
2630 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2631 the configuration file to be ":syslog", then the script "guesses" where
2632 the logs files are, rather than using the compiled in default. In our
2633 case the guess is not the same as the compiled default, so the script
2634 suddenly stopped working when I started to use syslog. The patch checks
2635 to see if log_file_path is "". If so, it attempts to read it from exim
2636 with no configuration file to get the compiled in version, before it
2637 falls back to the previous guessing code."
2639 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2640 implementing BATV in an Exim configuration. See NewStuff for the gory
2643 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2644 Makefile that are specific to HP-UX.
2646 PH/18 If the "use_postmaster" option was set for a recipient callout together
2647 with the "random" option, the postmaster address was used as the MAIL
2648 FROM address for the random test, but not for the subsequent recipient
2649 test. It is now used for both.
2651 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2652 patch removes a few documentation additions to RFC 3028, because the
2653 latest draft now contains them. It adds the new en;ascii-case comparator
2654 and a new error check for 8bit text in MIME parts. Comparator and
2655 require names are now matched exactly. I enabled the subaddress
2656 extension, but it is not well tested yet (read: it works for me)."
2658 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2659 rework some of the code of TK/09 above to avoid the hardwired use of
2660 "%lld" and "long long". Replaced the call to snprintf() with a call to
2663 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2664 records point to non-existent hosts", "retry timeout exceeded", and
2665 "retry time not reached for any host after a long failure period".
2667 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2668 experimental DomainKeys support:
2670 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2671 (2) On an error such as an illegally used "control", the wrong name for
2672 the control was given.
2674 These problems did NOT occur unless DomainKeys support was compiled.
2676 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2678 PH/24 Added ${if match_ip condition.
2680 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2681 databases so that it will be absolutely obvious if a crash occurs in the
2682 DB library. This is a regular occurrence (often caused by mis-matched
2685 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2686 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2687 picked up on a user's system that detects such things. There doesn't seem
2688 to be a gcc warning option for this - only an attribute that has to be
2689 put on the function's prototype. It seems that in Fedora Core 4 they have
2690 set this on a number of new functions. No doubt there will be more in due
2693 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2694 specify a transport. However, if an address that was verified by such a
2695 router was the subject of a callout, Exim crashed because it tried to
2696 read the rcpt_include_affixes from the non-existent transport. Now it
2697 just assumes that the setting of that option is false. This bug was
2698 introduced by 4.51/PH/31.
2700 PH/28 Changed -d+all to exclude +memory, because that information is very
2701 rarely of interest, but it makes the output a lot bigger. People tend to
2702 do -d+all out of habit.
2704 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2705 code in os-type was giving problems when libc.so lives in lib64, like on
2708 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2709 aren't the modern standard, and it seems that some systems' include files
2710 don't always have them. Exim was already checking for some of the newer
2711 ones like T_AAAA, and defining it itself. I've added checks for all the
2712 record types that Exim uses.
2714 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2715 not automatically generating a new one, as it is supposed to. This
2716 prevented TLS from working. If the file did exist, but contained invalid
2717 data, a new version was generated, as expected. It was only the case of a
2718 non-existent file that was broken.
2720 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2721 with a change in libdomainkeys > 0.64.
2723 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2724 from DNS. If the selector record carries the flag, it now has
2725 precedence over the domain-wide flag.
2727 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2729 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2730 the use of a port name that isn't defined in /etc/services) occurred, the
2731 message was deferred as in a normal delivery, and thus remained on the
2732 spool, instead of being failed because of the mua_wrapper setting. This
2733 is now fixed, and I tidied up some of the mua_wrapper messages at the
2736 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2737 the messages in a hash of arrays rather than using individual hashes.
2738 This is a bit cleaner and results in dramatic memory savings, albeit
2739 at a slight CPU cost.
2741 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2742 as requested by Marc Sherman.
2744 SC/10 Eximstats: added histograms for user specified patterns as requested
2747 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2749 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2750 fopen() in the content-scanning modules that did not already have it.
2756 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2757 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2759 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2761 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2763 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2764 to test Sieve filters that use "vacation".
2766 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2767 that changes the way the GnuTLS parameters are stored in the cache file.
2768 The new format can be generated externally. For backward compatibility,
2769 if the data in the cache doesn't make sense, Exim assumes it has read an
2770 old-format file, and it generates new data and writes a new file. This
2771 means that you can't go back to an older release without removing the
2774 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2775 work if there are any delivery delays because "one_time" forces the
2776 parent to be marked "delivered", so its unseen clone is never tried
2777 again. For this reason, Exim now forbids the simultaneous setting of
2780 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2781 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2782 entry if you want to know the details. The fix, however, neglected to
2783 consider the case when local delivery batching is involved. The test for
2784 "previously delivered" was not happening when checking to see if an
2785 address could be batched with a previous (undelivered) one; under
2786 certain circumstances this could lead to multiple deliveries to the same
2789 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2790 in its include files, and this causes problems building Exim.
2792 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2793 header_syntax) but Exim was just ignoring anything given after a slash.
2794 In particular, this caused confusion with an attempt to use "verify =
2795 reverse_host_lookup/defer_ok". An error is now given when options are
2796 supplied for verify items that do not have them. (Maybe reverse_host_
2797 lookup should have a defer_ok option, but that's a different point.)
2799 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2800 defined by RFC 821) to 2048, because there were problems with some AUTH
2801 commands, and RFC 1869 says the size should be increased for extended
2802 SMTP commands that take arguments.
2804 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2807 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2808 "unknown" error; now it says that the functionality isn't in the binary.
2810 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2811 an address' error message when a string expansion fails (syntax or
2812 whatever). Otherwise the password may appear in the log. Following change
2813 PH/42 below, there is no longer a chance of it appearing in a bounce
2816 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2818 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2819 of its addresses was ever tried. (Bugzilla bug #2.)
2821 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2822 the result incorrectly in the debug output. (It correctly added a newline
2823 to what was transported.)
2825 TF/01 Added $received_time.
2827 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2828 commented out examples of how to interface to a virus scanner and to
2829 SpamAssassin. Also added commented examples of av_scanner and
2830 spamd_address settings.
2832 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2833 and controls are allowed in which ACLs. There were a couple of minor
2834 errors. Some of the entries in the conditions table (which is a table of
2835 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2836 negation of where the condition IS allowed.
2838 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2840 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2841 header file does not have a version number, so I've had to invent a new
2842 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2843 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2844 radiusclient), but it was contributed by a Radius user.
2846 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2847 files or directories, for OpenSSL.
2849 PH/19 When an Exim process that is running as root has to create an Exim log
2850 file, it does so in a subprocess that runs as exim:exim so as to get the
2851 ownership right at creation (otherwise, other Exim processes might see
2852 the file with the wrong ownership). There was no test for failure of this
2853 fork() call, which would lead to the process getting stuck as it waited
2854 for a non-existent subprocess. Forks do occasionally fail when resources
2855 run out. I reviewed all the other calls to fork(); they all seem to check
2858 PH/20 When checking for unexpected SMTP input at connect time (before writing
2859 the banner), Exim was not dealing correctly with a non-positive return
2860 from the read() function. If the client had disconnected by this time,
2861 the result was a log entry for a synchronization error with an empty
2862 string after "input=" when read() returned zero. If read() returned -1
2863 (an event I could not check), uninitialized data bytes were printed.
2864 There were reports of junk text (parts of files, etc) appearing after
2867 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2869 PH/22 Added support for macro redefinition, and (re)definition in between
2870 driver and ACL definitions.
2872 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2873 forgetting to use the resulting value; it was using the unexpanded value.
2875 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2876 hadn't been configured. The fix is from Juergen Kreileder, who
2877 understands it better than I do:
2879 "Here's what I see happening with three configured cyrus_sasl
2880 authenticators configured (plain, login, cram-md5):
2882 On startup auth_cyrus_sasl_init() gets called for each of these.
2883 This means three calls to sasl_listmech() without a specified mech_list.
2884 => SASL tests which mechs of all available mechs actually work
2885 => three warnings about OTP not working
2886 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2888 With the patch, sasl_listmech() also gets called three times. But now
2889 SASL's mech_list option is set to the server_mech specified in the the
2890 authenticator. Or in other words, the answer from sasl_listmech()
2891 gets limited to just the mech you're testing for (which is different
2893 => the return list contains just 'plain' or 'login', 'cram-md5' or
2894 nothing depending on the value of ob->server_mech.
2896 I've just tested the patch: Authentication still works fine,
2897 unavailable mechs specified in the exim configuration are still
2898 caught, and the auth.log warnings about OTP are gone."
2900 PH/25 When debugging is enabled, the contents of the command line are added
2901 to the debugging output, even when log_selector=+arguments is not
2904 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2905 answer is "GNU", and only if the return is "GNU/something" is the answer
2908 PH/27 $acl_verify_message is now set immediately after the failure of a
2909 verification in an ACL, and so is available in subsequent modifiers. In
2910 particular, the message can be preserved by coding like this:
2912 warn !verify = sender
2913 set acl_m0 = $acl_verify_message
2915 Previously, $acl_verify_message was set only while expanding "message"
2916 and "log_message" when a very denied access.
2918 PH/28 Modified OS/os.c-Linux with
2920 -#ifndef OS_LOAD_AVERAGE
2921 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2923 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2924 nomenclature these days.)
2926 PH/29 Installed patch from the Sieve maintainer that adds the options
2927 sieve_useraddress and sieve_subaddress to the redirect router.
2929 PH/30 In these circumstances:
2930 . Two addresses routed to the same list of hosts;
2931 . First host does not offer TLS;
2932 . First host accepts first address;
2933 . First host gives temporary error to second address;
2934 . Second host offers TLS and a TLS session is established;
2935 . Second host accepts second address.
2936 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2937 and peerdn, if requested) that were in fact used only for the second
2940 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2941 attention to any local part prefix or suffix that was matched by the
2942 router that accepted the address. It now behaves in the same way as it
2943 does for delivery: the affixes are removed from the local part unless
2944 rcpt_include_affixes is set on the transport.
2946 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2947 timeout during the DATA phase of an incoming message.
2949 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2950 applied a patch sanctioned by the Sieve maintainer.
2952 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2953 the uid or gid is negative. A case of a negative gid caused this to be
2954 noticed. The fix allows for either to be negative.
2956 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2957 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2960 PH/36 The change PH/12 above was broken. Fixed it.
2962 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2963 the grounds that routing the same address twice would always produce the
2964 same answer. This might have been true once, but it is certainly no
2965 longer true now. Routing a child address may depend on the previous
2966 routing that produced that child. Some complicated redirection strategies
2967 went wrong when messages had multiple recipients, and made Exim's
2968 behaviour dependent on the order in which the addresses were given.
2970 I have moved the duplicate checking until after the routing is complete.
2971 Exim scans the addresses that are assigned to local and remote
2972 transports, and removes any duplicates. This means that more work will be
2973 done, as duplicates will always all be routed, but duplicates are
2974 presumably rare, so I don't expect this is of any significance.
2976 For deliveries to pipes, files, and autoreplies, the duplicate checking
2977 still happens during the routing process, since they are not going to be
2980 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2981 It corrects a timeout issue with spamd. This is Ian's comment: "The
2982 background is that sometimes spamd either never reads data from a
2983 connection it has accepted, or it never writes response data. The exiscan
2984 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2985 blindly assumes that writes won't block so it may never time out."
2987 PH/39 Allow G after quota size as well as K and M.
2989 PH/40 The value set for $authenticated_id in an authenticator may not contain
2990 binary zeroes or newlines because the value is written to log lines and
2991 to spool files. There was no check on this. Now the value is run through
2992 the string_printing() function so that such characters are converted to
2993 printable escape sequences.
2995 PH/41 $message_linecount is a new variable that contains the total number of
2996 lines in the message. Compare $body_linecount, which is the count for the
2999 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3000 bounce and delay warning messages, except in certain special cases, which
3003 (a) An SMTP error message from a remote host;
3004 (b) A message specified in a :fail: redirection;
3005 (c) A message specified in a "fail" command in a system filter;
3006 (d) A message specified in a FAIL return from the queryprogram router;
3007 (e) A message specified by the cannot_route_message router option.
3009 In these cases only, Exim does include the error details in bounce and
3010 warning messages. There are also a few cases where bland messages such
3011 as "unrouteable address" or "local delivery error" are given.
3013 PH/43 $value is now also set for the "else" part of a ${run expansion.
3015 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3016 being worked on, but at least Exim now implements the latest version to
3019 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3020 process to complete was treated as a delivery failure, a timeout while
3021 writing the message to the pipe was logged, but erroneously treated as a
3022 successful delivery. Such timeouts include transport filter timeouts. For
3023 consistency with the overall process timeout, these timeouts are now
3024 treated as errors, giving rise to delivery failures by default. However,
3025 there is now a new Boolean option for the pipe transport called
3026 timeout_defer, which, if set TRUE, converts the failures into defers for
3027 both kinds of timeout. A transport filter timeout is now identified in
3030 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3031 systems where "make" and "gmake" are different, calling "gmake" at top
3032 level broke things. I've arranged for the value of $(MAKE) to be passed
3033 from the Makefile to this script so that it can call the same version of
3037 A note about Exim versions 4.44 and 4.50
3038 ----------------------------------------
3040 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3041 changes of various kinds. As a consequence, a big documentation update was
3042 needed. This delayed the release for rather longer than seemed good, especially
3043 in the light of a couple of (minor) security issues. Therefore, the changes
3044 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3045 release. So 4.44 and 4.50 are in effect two different branches that both start
3048 I have left the 4.50 change log unchanged; it contains all the changes since
3049 4.43. The change log for 4.44 is below; many of its items are identical to
3050 those for 4.50. This seems to be the most sensible way to preserve the
3051 historical information.
3057 1. Minor wording change to the doc/README.SIEVE file.
3059 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3060 computation of the current number of files was incorrect.
3062 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3063 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3066 4. Give more explanation in the error message when the command for a transport
3067 filter fails to execute.
3069 5. There are several places where Exim runs a non-Exim command in a
3070 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3071 was being done only for the command run by the queryprogram router. It is
3072 now done for all such subprocesses. The other cases are: ${run, transport
3073 filters, and the commands run by the lmtp and pipe transports.
3075 6. Added CONFIGURE_GROUP build-time option.
3077 7. Some older OS have a limit of 256 on the maximum number of file
3078 descriptors. Exim was using setrlimit() to set 1000 as a large value
3079 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3080 systems. I've change it so that if it can't get 1000, it tries for 256.
3082 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3083 was an oversight, and furthermore, ever since the addition of extra
3084 controls (e.g. 4.43/32), the checks on when to allow different forms of
3085 "control" were broken. There should now be diagnostics for all cases when a
3086 control that does not make sense is encountered.
3088 9. Added the /retain_sender option to "control=submission".
3090 10. $recipients is now available in the predata ACL (oversight).
3092 11. Tidy the search cache before the fork to do a delivery from a message
3093 received from the command line. Otherwise the child will trigger a lookup
3094 failure and thereby defer the delivery if it tries to use (for example) a
3095 cached ldap connection that the parent has called unbind on.
3097 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3098 of $address_data from the recipient verification was clobbered by the
3099 sender verification.
3101 13. The value of address_data from a sender verification is now available in
3102 $sender_address_data in subsequent conditions in the ACL statement.
3104 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3106 15. Added a new option "connect=<time>" to callout options, to set a different
3109 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3110 was its contents. (It was OK if the option was not defined at all.)
3112 17. A "Completed" log line is now written for messages that are removed from
3113 the spool by the -Mrm option.
3115 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3116 information about exactly what failed.
3118 19. Added -dd to debug only the daemon process.
3120 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3121 handles timeouts, both on the server side and network timeouts. Renamed the
3122 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3124 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3125 It is now set to "smtps".
3127 22. $host_address is now set to the target address during the checking of
3128 ignore_target_hosts.
3130 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3131 being passed; this would have caused $sender_host_name to have been used if
3132 matching the list had actually called for a host name (not very likely,
3133 since this list is usually IP addresses). A host name is now passed as
3136 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3137 code that specifies a non-restarting handler (typically sigaction() in
3138 modern systems) in an attempt to fix a rare and obscure crash bug.
3140 25. Narrowed the window for a race in the daemon that could cause it to ignore
3141 SIGCHLD signals. This is not a major problem, because they are used only to
3142 wake it up if nothing else does.
3144 26. A malformed maildirsize file could cause Exim to calculate negative values
3145 for the mailbox size or file count. Odd effects could occur as a result.
3146 The maildirsize information is now recalculated if the size or filecount
3149 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3150 support for a long time. Removed HAVE_SYS_VFS_H.
3152 28. Installed the latest version of exipick from John Jetmore.
3154 29. In an address list, if the pattern was not a regular expression, an empty
3155 subject address (from a bounce message) matched only if the pattern was an
3156 empty string. Non-empty patterns were not even tested. This was the wrong
3157 because it is perfectly reasonable to use an empty address as part of a
3158 database query. An empty address is now tested by patterns that are
3159 lookups. However, all the other forms of pattern expect the subject to
3160 contain a local part and a domain, and therefore, for them, an empty
3161 address still always fails if the pattern is not itself empty.
3163 30. Exim went into a mad DNS loop when attempting to do a callout where the
3164 host was specified on an smtp transport, and looking it up yielded more
3165 than one IP address.
3167 31. Re-factored the code for checking spool and log partition space into a
3168 function that finds that data and another that does the check. The former
3169 is then used to implement four new variables: $spool_space, $log_space,
3170 $spool_inodes, and $log_inodes.
3172 32. The RFC2047 encoding function was originally intended for short strings
3173 such as real names; it was not keeping to the 75-character limit for
3174 encoded words that the RFC imposes. It now respects the limit, and
3175 generates multiple encoded words if necessary. To be on the safe side, I
3176 have increased the buffer size for the ${rfc2047: expansion operator from
3179 33. It is now permitted to omit both strings after an "if" condition; if the
3180 condition is true, the result is "true". As before, when the second string
3181 is omitted, a false condition yields an empty string. This makes it less
3182 cumbersome to write custom ACL and router conditions.
3184 34. Failure to deliver a bounce message always caused it to be frozen, even if
3185 there was an errors_to setting on the router. The errors_to setting is now
3188 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3189 canonical form (fully expanded) before being placed in
3190 $sender_host_address.
3192 36. The table in the code that translates DNS record types into text (T_A to
3193 "A" for instance) was missing entries for NS and CNAME. It is just possible
3194 that this could have caused confusion if both these types were looked up
3195 for the same domain, because the text type is used as part of Exim's
3196 per-process caching. But the chance of anyone hitting this buglet seems
3199 37. The dnsdb lookup has been extended in a number of ways.
3201 (1) There is a new type, "zns", which walks up the domain tree until it
3202 finds some nameserver records. It should be used with care.
3204 (2) There is a new type, "mxh", which is like "mx" except that it returns
3205 just the host names, not the priorities.
3207 (3) It is now possible to give a list of domains (or IP addresses) to be
3208 looked up. The behaviour when one of the lookups defers can be
3209 controlled by a keyword.
3211 (4) It is now possible to specify the separator character for use when
3212 multiple records are returned.
3214 38. The dnslists ACL condition has been extended: it is now possible to supply
3215 a list of IP addresses and/or domains to be looked up in a particular DNS
3218 39. Added log_selector=+queue_time_overall.
3220 40. When running the queue in the test harness, wait just a tad after forking a
3221 delivery process, to get repeatability of debugging output.
3223 41. Include certificate and key file names in error message when GnuTLS fails
3224 to set them up, because the GnuTLS error message doesn't include the name
3225 of the failing file when there is a problem reading it.
3227 42. Allow both -bf and -bF in the same test run.
3229 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3231 44. The "Exiscan patch" is now merged into the mainline Exim source.
3233 45. Sometimes the final signoff response after QUIT could fail to get
3234 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3235 < 0 before doing a fflush(). This bug looks as though it goes back to the
3236 introduction of TLS in release 3.20, but "sometimes" must have been rare
3237 because the tests only now provoked it.
3239 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3240 (this can affect the format of dates).
3242 47. exim_tidydb, when checking for the continued existence of a message for
3243 which it has found a message-specific retry record, was not finding
3244 messages that were in split spool directories. Consequently, it was
3245 deleting retry records that should have stayed in existence.
3247 48. Steve fixed some bugs in eximstats.
3249 49. The SPA authentication driver was not abandoning authentication and moving
3250 on to the next authenticator when an expansion was forced to fail,
3251 contradicting the general specification for all authenticators. Instead it
3252 was generating a temporary error. It now behaves as specified.
3254 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3255 (the order specifies the preference for clients). The order is now AES256,
3256 AES128, 3DES, ARCFOUR128.
3258 51. Small patch to Sieve code - explicitly set From: when generating an
3261 52. Exim crashed if a remote delivery caused a very long error message to be
3262 recorded - for instance if somebody sent an entire SpamAssassin report back
3263 as a large number of 550 error lines. This bug was coincidentally fixed by
3264 increasing the size of one of Exim's internal buffers (big_buffer) that
3265 happened as part of the Exiscan merge. However, to be on the safe side, I
3266 have made the code more robust (and fixed the comments that describe what
3269 53. Now that there can be additional text after "Completed" in log lines (if
3270 the queue_time_overall log selector is set), a one-byte patch to exigrep
3271 was needed to allow it to recognize "Completed" as not the last thing in
3274 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3275 patch that reportedly fixes this has been added. I am not expert enough to
3276 create a test for it. This is what the patch creator wrote:
3278 "I found a little strange behaviour of ldap code when working with
3279 Windows 2003 AD Domain, where users was placed in more than one
3280 Organization Units. When I tried to give exim partial DN, the exit code
3281 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3282 But simultaneously result of request was absolutely normal ldap result,
3283 so I produce this patch..."
3285 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3286 REFERENCE, so I have modified the code to exclude the patch when that macro
3289 55. Some experimental protocols are using DNS PTR records for new purposes. The
3290 keys for these records are domain names, not reversed IP addresses. The
3291 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3292 leaves it alone. Component reversal etc. now happens only for IP addresses.
3295 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3297 57. Double the size of the debug message buffer (to 2048) so that more of very
3298 long debug lines gets shown.
3300 58. The exicyclog utility now does better if the number of log files to keep
3301 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3303 59. Two changes related to the smtp_active_hostname option:
3305 (1) $smtp_active_hostname is now available as a variable.
3306 (2) The default for smtp_banner uses $smtp_active_hostname instead
3307 of $primary_hostname.
3309 60. The host_aton() function is supposed to be passed a string that is known
3310 to be a valid IP address. However, in the case of IPv6 addresses, it was
3311 not checking this. This is a hostage to fortune. Exim now panics and dies
3312 if the condition is not met. A case was found where this could be provoked
3313 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3314 components; fortuitously, this particular loophole had already been fixed
3315 by change 4.50/55 above.
3317 If there are any other similar loopholes, the new check in host_aton()
3318 itself should stop them being exploited. The report I received stated that
3319 data on the command line could provoke the exploit when Exim was running as
3320 exim, but did not say which command line option was involved. All I could
3321 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3322 running as the user.
3325 61. There was a buffer overflow vulnerability in the SPA authentication code
3326 (which came originally from the Samba project). I have added a test to the
3327 spa_base64_to_bits() function which I hope fixes it.
3330 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3331 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3333 63. The daemon start-up calls getloadavg() while still root for those OS that
3334 need the first call to be done as root, but it missed one case: when
3335 deliver_queue_load_max is set with deliver_drop_privilege. This is
3336 necessary for the benefit of the queue runner, because there is no re-exec
3337 when deliver_drop_privilege is set.
3339 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3340 This has been fixed.
3342 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3343 was in use, was not putting the data itself into the right store pool;
3344 consequently, it could be overwritten for a subsequent message in the same
3345 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3348 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3350 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3351 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3352 the function were treating the return as a boolean value, which happened to
3353 work because 0=false and not-0=true, but is not correct code.
3355 68. The host_aton() function was not handling scoped IPv6 addresses (those
3356 with, for example, "%eth0" on the end) correctly.
3358 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3359 negated items (that is, ~something) in unsigned ints. Some compilers
3360 apparently mutter when there is no cast.
3362 70. If an address verification called from an ACL failed, and did not produce a
3363 user-specific message (i.e. there was only a "system" message), nothing was
3364 put in $acl_verify_message. In this situation, it now puts the system
3367 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3368 session; change 4.31/43 added the unwanted input to the log line - except
3369 that it did not do this in the start of session case. It now does.
3371 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3372 This is wrong and can cause the other end to generate a synchronization
3373 error if it is another Exim or anything else that does the synchronization
3374 check. A QUIT command is no longer sent after a timeout.
3376 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3377 during host lookups.
3379 74. The defer_ok option of callout verification was not working if it was used
3380 when verifying addresses in header lines, that is, for this case:
3382 verify = header_sender/callout=defer_ok
3384 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3385 those file descriptors could be used for SMTP connections. If anything
3386 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3387 could be sent to the SMTP client, causing chaos. The daemon now opens
3388 stdin, stdout, and stderr to /dev/null when it puts itself into the
3391 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3392 log by default. The user can override this with suitable Perl magic.
3394 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3395 the log message when discard triggers, was not working for the DATA ACL or
3396 for the non-SMTP ACL.
3398 78. Error message wording change in sieve.c.
3400 79. If smtp_accept_max_per_host was set, the number of connections could be
3401 restricted to fewer than expected, because the daemon was trying to set up
3402 a new connection before checking whether the processes handling previous
3403 connections had finished. The check for completed processes is now done
3404 earlier. On busy systems, this bug wouldn't be noticed because something
3405 else would have woken the daemon, and it would have reaped the completed
3408 80. If a message was submitted locally by a user whose login name contained one
3409 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3410 It caused a spool format error. I have fixed the spool reading code. A
3411 related problem was that the "from" clause in the Received: line became
3412 illegal because of the space(s). It is now covered by ${quote_local_part.
3414 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3417 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3419 83. Patch from Sieve maintainer to fix unterminated string problem in
3420 "vacation" handling.
3422 84. Some minor changes to the Linux configuration files to help with other
3423 OS variants using glibc.
3425 85. One more patch for Sieve to update vacation handling to latest spec.
3428 ----------------------------------------------------
3429 See the note above about the 4.44 and 4.50 releases.
3430 ----------------------------------------------------
3436 1. Change 4.43/35 introduced a bug that caused file counts to be
3437 incorrectly computed when quota_filecount was set in an appendfile
3440 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3441 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3444 3. Give more explanation in the error message when the command for a transport
3445 filter fails to execute.
3447 4. There are several places where Exim runs a non-Exim command in a
3448 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3449 was being done only for the command run by the queryprogram router. It is
3450 now done for all such subprocesses. The other cases are: ${run, transport
3451 filters, and the commands run by the lmtp and pipe transports.
3453 5. Some older OS have a limit of 256 on the maximum number of file
3454 descriptors. Exim was using setrlimit() to set 1000 as a large value
3455 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3456 systems. I've change it so that if it can't get 1000, it tries for 256.
3458 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3459 was an oversight, and furthermore, ever since the addition of extra
3460 controls (e.g. 4.43/32), the checks on when to allow different forms of
3461 "control" were broken. There should now be diagnostics for all cases when a
3462 control that does not make sense is encountered.
3464 7. $recipients is now available in the predata ACL (oversight).
3466 8. Tidy the search cache before the fork to do a delivery from a message
3467 received from the command line. Otherwise the child will trigger a lookup
3468 failure and thereby defer the delivery if it tries to use (for example) a
3469 cached ldap connection that the parent has called unbind on.
3471 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3472 of $address_data from the recipient verification was clobbered by the
3473 sender verification.
3475 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3476 was its contents. (It was OK if the option was not defined at all.)
3478 11. A "Completed" log line is now written for messages that are removed from
3479 the spool by the -Mrm option.
3481 12. $host_address is now set to the target address during the checking of
3482 ignore_target_hosts.
3484 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3485 being passed; this would have caused $sender_host_name to have been used if
3486 matching the list had actually called for a host name (not very likely,
3487 since this list is usually IP addresses). A host name is now passed as
3490 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3491 code that specifies a non-restarting handler (typically sigaction() in
3492 modern systems) in an attempt to fix a rare and obscure crash bug.
3494 15. Narrowed the window for a race in the daemon that could cause it to ignore
3495 SIGCHLD signals. This is not a major problem, because they are used only to
3496 wake it up if nothing else does.
3498 16. A malformed maildirsize file could cause Exim to calculate negative values
3499 for the mailbox size or file count. Odd effects could occur as a result.
3500 The maildirsize information is now recalculated if the size or filecount
3503 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3504 support for a long time. Removed HAVE_SYS_VFS_H.
3506 18. Updated exipick to current release from John Jetmore.
3508 19. Allow an empty sender to be matched against a lookup in an address list.
3509 Previously the only cases considered were a regular expression, or an
3512 20. Exim went into a mad DNS lookup loop when doing a callout where the
3513 host was specified on the transport, if the DNS lookup yielded more than
3516 21. The RFC2047 encoding function was originally intended for short strings
3517 such as real names; it was not keeping to the 75-character limit for
3518 encoded words that the RFC imposes. It now respects the limit, and
3519 generates multiple encoded words if necessary. To be on the safe side, I
3520 have increased the buffer size for the ${rfc2047: expansion operator from
3523 22. Failure to deliver a bounce message always caused it to be frozen, even if
3524 there was an errors_to setting on the router. The errors_to setting is now
3527 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3528 canonical form (fully expanded) before being placed in
3529 $sender_host_address.
3531 24. Updated eximstats to version 1.33
3533 25. Include certificate and key file names in error message when GnuTLS fails
3534 to set them up, because the GnuTLS error message doesn't include the name
3535 of the failing file when there is a problem reading it.
3537 26. Expand error message when OpenSSL has problems setting up cert/key files.
3540 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3541 (this can affect the format of dates).
3543 28. exim_tidydb, when checking for the continued existence of a message for
3544 which it has found a message-specific retry record, was not finding
3545 messages that were in split spool directories. Consequently, it was
3546 deleting retry records that should have stayed in existence.
3548 29. eximstats updated to version 1.35
3549 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3550 1.35 - bugfix such that pie charts by volume are generated correctly
3552 30. The SPA authentication driver was not abandoning authentication and moving
3553 on to the next authenticator when an expansion was forced to fail,
3554 contradicting the general specification for all authenticators. Instead it
3555 was generating a temporary error. It now behaves as specified.
3557 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3558 (the order specifies the preference for clients). The order is now AES256,
3559 AES128, 3DES, ARCFOUR128.
3561 31. Small patch to Sieve code - explicitly set From: when generating an
3564 32. Exim crashed if a remote delivery caused a very long error message to be
3565 recorded - for instance if somebody sent an entire SpamAssassin report back
3566 as a large number of 550 error lines. This bug was coincidentally fixed by
3567 increasing the size of one of Exim's internal buffers (big_buffer) that
3568 happened as part of the Exiscan merge. However, to be on the safe side, I
3569 have made the code more robust (and fixed the comments that describe what
3572 33. Some experimental protocols are using DNS PTR records for new purposes. The
3573 keys for these records are domain names, not reversed IP addresses. The
3574 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3575 leaves it alone. Component reversal etc. now happens only for IP addresses.
3578 34. The host_aton() function is supposed to be passed a string that is known
3579 to be a valid IP address. However, in the case of IPv6 addresses, it was
3580 not checking this. This is a hostage to fortune. Exim now panics and dies
3581 if the condition is not met. A case was found where this could be provoked
3582 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3583 components; fortuitously, this particular loophole had already been fixed
3584 by change 4.50/55 or 4.44/33 above.
3586 If there are any other similar loopholes, the new check in host_aton()
3587 itself should stop them being exploited. The report I received stated that
3588 data on the command line could provoke the exploit when Exim was running as
3589 exim, but did not say which command line option was involved. All I could
3590 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3591 running as the user.
3594 35. There was a buffer overflow vulnerability in the SPA authentication code
3595 (which came originally from the Samba project). I have added a test to the
3596 spa_base64_to_bits() function which I hope fixes it.
3599 36. The daemon start-up calls getloadavg() while still root for those OS that
3600 need the first call to be done as root, but it missed one case: when
3601 deliver_queue_load_max is set with deliver_drop_privilege. This is
3602 necessary for the benefit of the queue runner, because there is no re-exec
3603 when deliver_drop_privilege is set.
3605 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3606 was in use, was not putting the data itself into the right store pool;
3607 consequently, it could be overwritten for a subsequent message in the same
3608 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3611 38. Sometimes the final signoff response after QUIT could fail to get
3612 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3613 < 0 before doing a fflush(). This bug looks as though it goes back to the
3614 introduction of TLS in release 3.20, but "sometimes" must have been rare
3615 because the tests only now provoked it.
3621 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3622 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3623 Now it returns an integer. A number of calls were still expecting a T/F
3624 return. Fortuitously, in all cases, the tests worked in OK situations,
3625 which is the norm. However, things would have gone wrong on any write
3626 failures on the smtp file descriptor. This function is used when sending
3627 messages over SMTP and also when doing verify callouts.
3629 2. When Exim is called to do synchronous delivery of a locally submitted
3630 message (the -odf or -odi options), it no longer closes stderr before doing
3633 3. Implemented the mua_wrapper option.
3635 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3637 5. Implemented the functions header_remove(), header_testname(),
3638 header_add_at_position(), and receive_remove_recipient(), and exported them
3641 6. If an ACL "warn" statement specified the addition of headers, Exim already
3642 inserted X-ACL-Warn: at the start if there was no header name. However, it
3643 was not making this test for the second and subsequent header lines if
3644 there were newlines in the string. This meant that an invalid header could
3645 be inserted if Exim was badly configured.
3647 7. Allow an ACL "warn" statement to add header lines at the start or after all
3648 the Received: headers, as well as at the end.
3650 8. Added the rcpt_4xx retry error code.
3652 9. Added postmaster_mailfrom=xxx to callout verification option.
3654 10. Added mailfrom=xxxx to the callout verification option, for verify=
3657 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3658 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3660 12. Inserted some casts to stop certain compilers warning when using pointer
3661 differences as field lengths or precisions in printf-type calls (mostly
3662 affecting debugging statements).
3664 13. Added optional readline() support for -be (dynamically loaded).
3666 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3667 same clock tick as a message's arrival, so that its received time was the
3668 same as the "first fail" time on the retry record, and that message
3669 remained on the queue past the ultimate address timeout, every queue runner
3670 would try a delivery (because it was past the ultimate address timeout) but
3671 after another failure, the ultimate address timeout, which should have then
3672 bounced the address, did not kick in. This was a "< instead of <=" error;
3673 in most cases the first failure would have been in the next clock tick
3674 after the received time, and all would be well.
3676 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3677 being recognized when the domain list was tested by the match_domain
3678 condition in an expansion string.
3680 16. Added the ${str2b64: operator.
3682 17. Exim was always calling setrlimit() to set a large limit for the number of
3683 processes, without checking whether the existing limit was already
3684 adequate. (It did check for the limit on file descriptors.) Furthermore,
3685 errors from getrlimit() and setrlimit() were being ignored. Now they are
3686 logged to the main and panic logs, but Exim does carry on, to try to do its
3687 job under whatever limits there are.
3689 18. Imported PCRE 5.0.
3691 19. Trivial typo in log message " temporarily refused connection" (the leading
3694 20. If the log selector return_path_on_delivery was set and an address was
3695 redirected to /dev/null, the delivery process crashed because it assumed
3696 that a return path would always be set for a "successful" delivery. In this
3697 case, the whole delivery is bypassed as an optimization, and therefore no
3700 21. Internal re-arrangement: the function for sending a challenge and reading
3701 a response while authentication was assuming a zero-terminated challenge
3702 string. It's now changed to take a pointer and a length, to allow for
3703 binary data in such strings.
3705 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3707 23. Exim was not respecting finduser_retries when seeking the login of the
3708 uid under which it was called; it was always trying 10 times. (The default
3709 setting of finduser_retries is zero.) Also, it was sleeping after the final
3710 failure, which is pointless.
3712 24. Implemented tls_on_connect_ports.
3714 25. Implemented acl_smtp_predata.
3716 26. If the domain in control=submission is set empty, Exim assumes that the
3717 authenticated id is a complete email address when it generates From: or
3718 Sender: header lines.
3720 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3721 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3722 chown and chgrp in /bin and hostname in /usr/bin.
3724 28. Exim was keeping the "process log" file open after each use, just as it
3725 does for the main log. This opens the possibility of it remaining open for
3726 long periods when the USR1 signal hits a daemon. Occasional processlog
3727 errors were reported, that could have been caused by this. Anyway, it seems
3728 much more sensible not to leave this file open at all, so that is what now
3731 29. The long-running daemon process does not normally write to the log once it
3732 has entered its main loop, and it closes the log before doing so. This is
3733 so that log files can straightforwardly be renamed and moved. However,
3734 there are a couple of unusual error situations where the daemon does write
3735 log entries, and I had neglected to close the log afterwards.
3737 30. The text of an SMTP error response that was received during a remote
3738 delivery was being truncated at 512 bytes. This is too short for some of
3739 the long messages that one sometimes sees. I've increased the limit to
3742 31. It is now possible to make retry rules that apply only when a message has a
3743 specific sender, in particular, an empty sender.
3745 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3746 it possible to be selective about when SMTP synchronization is enforced.
3748 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3750 32. Implemented hosts_connection_nolog.
3752 33. Added an ACL for QUIT.
3754 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3757 35. Added mailbox_size and mailbox_filecount to appendfile.
3759 36. Added control = no_multiline_responses to ACLs.
3761 37. There was a bug in the logic of the code that waits for the clock to tick
3762 in the case where the clock went backwards by a substantial amount such
3763 that the microsecond fraction of "now" was more than the microsecond
3764 fraction of "then" (but the whole seconds number was less).
3766 38. Added support for the libradius Radius client library this is found on
3767 FreeBSD (previously only the radiusclient library was supported).
3773 1. When certain lookups returned multiple values in the form name=value, the
3774 quoting of the values was not always being done properly. Specifically:
3775 (a) If the value started with a double quote, but contained no whitespace,
3777 (b) If the value contained whitespace other than a space character (i.e.
3778 tabs or newlines or carriage returns) it was not quoted.
3779 This fix has been applied to the mysql and pgsql lookups by writing a
3780 separate quoting function and calling it from the lookup code. The fix
3781 should probably also be applied to nisplus, ibase and oracle lookups, but
3782 since I cannot test any of those, I have not disturbed their existing code.
3784 2. A hit in the callout cache for a specific address caused a log line with no
3785 reason for rejecting RCPT. Now it says "Previous (cached) callout
3786 verification failure".
3788 3. There was an off-by-one bug in the queryprogram router. An over-long
3789 return line was truncated at 256 instead of 255 characters, thereby
3790 overflowing its buffer with the terminating zero. As well as fixing this, I
3791 have increased the buffer size to 1024 (and made a note to document this).
3793 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3794 when Exim is waiting for an SMTP response from a remote server, Exim
3795 restarts its select() call on the socket, thereby resetting its timeout.
3796 This is not a problem when such interrupts are rare. Somebody set up a cron
3797 job to run exiwhat every 2 minutes, which is less than the normal select()
3798 timeout (5 or 10 minutes). This meant that the select() timeout never
3799 kicked in because it was always reset. I have fixed this by comparing the
3800 time when an interrupt arrives with the time at the start of the first call
3801 to select(). If more time than the timeout has elapsed, the interrupt is
3802 treated as a timeout.
3804 5. Some internal re-factoring in preparation for the addition of Sieve
3805 extensions (by MH). In particular, the "personal" test is moved to a
3806 separate function, and given an option for scanning Cc: and Bcc: (which is
3807 not set for Exim filters).
3809 6. When Exim created an email address using the login of the caller as the
3810 local part (e.g. when creating a From: or Sender: header line), it was not
3811 quoting the local part when it contained special characters such as @.
3813 7. Installed new OpenBSD configuration files.
3815 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3816 try to make them clearer.
3818 9. Callout options, other than the timeout value, were being ignored when
3819 verifying sender addresses in header lines. For example, when using
3821 verify = header_sender/callout=no_cache
3823 the cache was (incorrectly) being used.
3825 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3826 only the Cygwin environment.
3828 11. When return_path_on_delivery was set as a log selector, if different remote
3829 addresses in the same message used different return paths and parallel
3830 remote delivery occurred, the wrong values would sometimes be logged.
3831 (Whenever a remote delivery process finished, the return path value from
3832 the most recently started remote delivery process was logged.)
3834 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3835 lines when AUTH and/or TLS are in use. This is the "received protocol"
3836 field. Exim used to use "asmtp" for authenticated SMTP, without any
3837 indication (in the protocol name) for TLS use. Now it follows the RFC and
3838 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3839 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3840 names appear in log lines as well as in Received: header lines.
3842 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3843 extensions, and comparison tests, and to fix some bugs.
3845 14. Changes to the "personal" filter test:
3847 (1) The test was buggy in that it was just doing the equivalent of
3848 "contains" tests on header lines. For example, if a user's address was
3849 anne@some.where, the "personal" test would incorrectly be true for
3851 To: susanne@some.where
3853 This test is now done by extracting each address from the header in turn,
3854 and checking the entire address. Other tests that are part of "personal"
3855 are now done using regular expressions (for example, to check local parts
3856 of addresses in From: header lines).
3858 (2) The list of non-personal local parts in From: addresses has been
3859 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3860 taken from the Sieve specification recommendations.
3862 (3) If the message contains any header line starting with "List-" it is
3863 treated as non-personal.
3865 (4) The test for "circular" in the Subject: header line has been removed
3866 because it now seems ill-conceived.
3868 15. Minor typos in src/EDITME comments corrected.
3870 16. Installed latest exipick from John Jetmore.
3872 17. If headers_add on a router specified a text string that was too long for
3873 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3874 of string_sprintf() is now avoided.
3876 18. $message_body_size was not set (it was always zero) when running the DATA
3877 ACL and the local_scan() function.
3879 19. For the "mail" command in an Exim filter, no default was being set for
3880 the once_repeat time, causing a random time value to be used if "once" was
3881 specified. (If the value happened to be <= 0, no repeat happened.) The
3882 default is now 0s, meaning "never repeat". The "vacation" command was OK
3883 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3884 (I found it when inspecting the code).
3886 20. There is now an overall timeout for performing a callout verification. It
3887 defaults to 4 times the callout timeout, which applies to individual SMTP
3888 commands during the callout. The overall timeout applies when there is more
3889 than one host that can be tried. The timeout is checked before trying the
3890 next host. This prevents very long delays if there are a large number of
3891 hosts and all are timing out (e.g. when the network connections are timing
3892 out). The value of the overall timeout can be changed by specifying an
3893 additional sub-option for "callout", called "maxwait". For example:
3895 verify = sender/callout=5s,maxwait=20s
3897 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3898 to the end before writing, but this should make it even safer).
3900 22. Exim was forgetting that it had advertised PIPELINING for the second and
3901 subsequent messages on an SMTP connection. It was also not resetting its
3902 memory on STARTTLS and an internal HELO.
3904 23. When Exim logs an SMTP synchronization error within a session, it now
3905 records whether PIPELINING has been advertised or not.
3907 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3908 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3909 rather than long int.
3911 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3913 26. Added the never_mail option to autoreply.
3919 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3920 crash if the getsockname() call failed; this can happen if a connection is
3921 closed very soon after it is established. The problem was simply in the
3922 order in which certain operations were done, causing Exim to try to write
3923 to the SMTP stream before it had set up the file descriptor. The bug has
3924 been fixed by making things happen in the correct order.
3930 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3931 before the connection was closed, thus losing the rejection response.
3933 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3934 some early Solaris releases, but causes trouble in current releases where
3935 socklen_t is defined.
3937 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3940 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3943 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3944 that releasing the top of it at the end releases what was used for sub-
3945 expansions (unless the block got too big). However, discard this block if
3946 the first thing is a variable or header, so that we can use its block when
3947 it is dynamic (useful for very large $message_headers, for example).
3949 6. Lookups now cache *every* query, not just the most recent. A new, separate
3950 store pool is used for this. It can be recovered when all lookup caches are
3951 flushed. Lookups now release memory at the end of their result strings.
3952 This has involved some general refactoring of the lookup sources.
3954 7. Some code has been added to the store_xxx() functions to reduce the amount
3955 of flapping under certain conditions.
3957 8. log_incoming_interface used to affect only the <= reception log lines. Now
3958 it causes the local interface and port to be added to several more SMTP log
3959 lines, for example "SMTP connection from", and rejection lines.
3961 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3963 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3965 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3966 could be overwritten at the end of the current message (or the start of a
3967 new message if it was set in a HELO ACL). The value is now preserved for
3968 the duration of the SMTP connection.
3970 12. If a transport had a headers_rewrite setting, and a matching header line
3971 contained an unqualified address, that address was qualified, even if it
3972 did not match any rewriting rules. The underlying bug was that the values
3973 of the flags that permit the existence of unqualified sender and recipient
3974 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3975 non-local messages, and by -bnq for local messages) were not being
3976 preserved with the message after it was received.
3978 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3979 "next input=" as part of the text comprising the host identity instead of
3980 the correct text. The code was using the same buffer for two different
3981 strings. However, depending on which order the printing function evaluated
3982 its arguments, the bug did not always show up. Under Linux, for example, my
3983 test suite worked just fine.
3985 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3986 doesn't work with some older versions of Perl. It has been changed to "my",
3987 which in any case is probably the better facility to use.
3989 15. A really picky compiler found some instances of statements for creating
3990 error messages that either had too many or two few arguments for the format
3993 16. The size of the buffer for calls to the DNS resolver has been increased
3994 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3995 for addresses that have a lot of PTR records. This alleviates a problem; it
3996 does not fully solve it.
3998 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3999 buffer now truncates the list and logs the incident, which is the same
4000 action as happens when Exim is looking up a host name and its aliases.
4001 Previously in this situation something unpredictable would happen;
4002 sometimes it was "internal error: store_reset failed".
4004 18. If a server dropped the connection unexpectedly when an Exim client was
4005 using GnuTLS and trying to read a response, the client delivery process
4006 crashed while trying to generate an error log message.
4008 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4009 string, for example:
4011 warn message = H1: something\nH2: something
4013 the text was added as a single header line from Exim's point of view
4014 though it ended up OK in the delivered message. However, searching for the
4015 second and subsequent header lines using $h_h2: did not work. This has been
4016 fixed. Similarly, if a system filter added multiple headers in this way,
4017 the routers could not see them.
4019 20. Expanded the error message when iplsearch is called with an invalid key to
4020 suggest using net-iplsearch in a host list.
4022 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4023 ACLs are no longer actually imposed (and a message to that effect is
4026 22. If a "gecos" field in a passwd entry contained escaped characters, in
4027 particular, if it contained a \" sequence, Exim got it wrong when building
4028 a From: or a Sender: header from that name. A second bug also caused
4029 incorrect handling when an unquoted " was present following a character
4030 that needed quoting.
4032 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4033 was not being matched caselessly.
4035 24. Arranged for all hyphens in the exim.8 source to be escaped with
4038 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4039 properly. Recipient callout cache records were still being keyed to include
4040 the sender, even when use_sender was set false. This led to far more
4041 callouts that were necessary. The sender is no longer included in the key
4042 when use_sender is false.
4044 26. Added "control = submission" modifier to ACLs.
4046 27. Added the ${base62d: operator to decode base 62 numbers.
4048 28. dnsdb lookups can now access SRV records.
4050 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4051 the configuration file.
4053 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4054 (-v) mode. This makes the output for a verbose queue run more intelligible.
4056 31. Added a use_postmaster feature to recipient callouts.
4058 32. Added the $body_zerocount variable, containing the number of binary zero
4059 bytes in the message body.
4061 33. The time of last modification of the "new" subdirectory is now used as the
4062 "mailbox time last read" when there is a quota error for a maildir
4065 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4067 35. Added +ignore_unknown as a special item in host lists.
4069 36. Code for decoding IPv6 addresses in host lists is now included, even if
4070 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4071 address was recognized as an IP address, but was then not correctly decoded
4072 into binary, causing unexpected and incorrect effects when compared with
4079 1. Very minor rewording of debugging text in manualroute to say "list of
4080 hosts" instead of "hostlist".
4082 2. If verify=header_syntax was set, and a header line with an unqualified
4083 address (no domain) and a large number of spaces between the end of the
4084 name and the colon was received, the reception process suffered a buffer
4085 overflow, and (when I tested it) crashed. This was caused by some obsolete
4086 code that should have been removed. The fix is to remove it!
4088 3. When running in the test harness, delay a bit after writing a bounce
4089 message to get a bit more predictability in the log output.
4091 4. Added a call to search_tidyup() just before forking a reception process. In
4092 theory, someone could use a lookup in the expansion of smtp_accept_max_
4093 per_host which, without the tidyup, could leave open a database connection.
4095 5. Added the variables $recipient_data and $sender_data which get set from a
4096 lookup success in an ACL "recipients" or "senders" condition, or a router
4097 "senders" option, similar to $domain_data and $local_part_data.
4099 6. Moved the writing of debug_print from before to after the "senders" test
4102 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4103 problems for message scanning, either using a data ACL, or using
4104 local_scan() because the Received: header was not generated till after they
4105 were called (in order to set the time as the time of reception completion).
4106 I have revised the way this works. The header is now generated after the
4107 body is received, but before the ACL or local_scan() are called. After they
4108 are run, the timestamp in the header is updated.
4114 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4115 before starting a queue runner without re-exec. This happened only when
4116 deliver_drop_privilege was set or when the Exim user was set to root. The
4117 effect of the bug was that timeouts during subsequent deliveries caused
4118 crashes instead of being properly handled. The handler is now left at its
4119 default (and expected) setting.
4121 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4122 message, again when deliver_drop_privilege is set or Exim is run as root.
4123 The bug described in (1) was not present in this case, but the tidying up
4124 of the other signals was missing. I have made the two cases consistent.
4126 3. The ignore_target_hosts setting on a manualroute router was being ignored
4127 for hosts that were looked up using the /MX notation.
4129 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4132 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4133 operated on the sender address. After changing the $sender_address to <>
4134 for the sender address verify, Exim was re-instated it as the original
4135 (before rewriting) address, but remembering that it had rewritten it, so it
4136 wasn't rewriting it again. This bug also had the effect of breaking the
4137 sender address verification caching when the sender address was rewritten.
4139 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4140 This has been changed so that if the ip literal address matches
4141 ignore_target_hosts, the router declines.
4143 7. Added expansion conditions match_domain, match_address, and match_local_
4144 part (NOT match_host).
4146 8. The placeholder for the Received: header didn't have a length field set.
4148 9. Added code to Exim itself and to exim_lock to test for a specific race
4149 condition that could lead to file corruption when using MBX delivery. The
4150 issue is with the lockfile that is created in /tmp. If this file is removed
4151 after a process has opened it but before that process has acquired a lock,
4152 there is the potential for a second process to recreate the file and also
4153 acquire a lock. This could lead to two Exim processes writing to the file
4154 at the same time. The added code performs the same test as UW imapd; it
4155 checks after acquiring the lock that its file descriptor still refers to
4156 the same named file.
4158 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4159 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4162 11. Added the smtp_active_hostname option. If used, this will typically be made
4163 to depend on the incoming interface address. Because $interface_address is
4164 not set up until the daemon has forked a reception process, error responses
4165 that can happen earlier (such as "too many connections") no longer contain
4168 12. If an expansion in a condition on a "warn" statement fails because a lookup
4169 defers, the "warn" statement is abandoned, and the next ACL statement is
4170 processed. Previously this caused the whole ACL to be aborted.
4172 13. Added the iplsearch lookup type.
4174 14. Added ident_timeout as a log selector.
4176 15. Added tls_certificate_verified as a log selector.
4178 16. Added a global option tls_require_ciphers (compare the smtp transport
4179 option of the same name). This controls incoming TLS connections.
4181 17. I finally figured out how to make tls_require_ciphers do a similar thing
4182 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4183 before starting the TLS session.
4185 18. Tabs are now shown as \t in -bP output.
4187 19. If the log selector return_path_on_delivery was set, Exim crashed when
4188 bouncing a message because it had too many Received: header lines.
4190 20. If two routers both had headers_remove settings, and the first one included
4191 a superfluous trailing colon, the final name in the first list and the
4192 first name in the second list were incorrectly joined into one item (with a
4193 colon in the middle).
4199 1. Added -C and -D options to the exinext utility, mainly to make it easier
4200 to include in the automated testing, but these could be helpful when
4201 multiple configurations are in use.
4203 2. The exinext utility was not formatting the output nicely when there was
4204 an alternate port involved in the retry record key, nor when there was a
4205 message id as well (for retries that were specific to a specific message
4206 and a specific host). It was also confused by IPv6 addresses, because of
4207 the additional colons they contain. I have fixed the IPv4 problem, and
4208 patched it up to do a reasonable job for IPv6.
4210 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4211 delivery, the log line now contains "pipelined" if PIPELINING was used.
4213 4. An SMTP transport process used to panic and die if the bind() call to set
4214 an explicit outgoing interface failed. This has been changed; it is now
4215 treated in the same way as a connect() failure.
4217 5. A reference to $sender_host_name in the part of a conditional expansion
4218 that was being skipped was still causing a DNS lookup. This no longer
4221 6. The def: expansion condition was not recognizing references to header lines
4222 that used bh_ and bheader_.
4224 7. Added the _cache feature to named lists.
4226 8. The code for checking quota_filecount in the appendfile transport was
4227 allowing one more file than it should have been.
4229 9. For compatibility with Sendmail, the command line option
4237 and sets the incoming protocol and host name (for trusted callers). The
4238 host name and its colon can be omitted when only the protocol is to be set.
4239 Note the Exim already has two private options, -pd and -ps, that refer to
4240 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4241 "s", but I don't think that's a major issue.
4243 10. A number of refactoring changes to the code, none of which should affect
4246 (a) The number of logging options was getting close to filling up the
4247 32-bit word that was used as a bit map. I have split them into two classes:
4248 those that are passed in the argument to log_write(), and those that are
4249 only ever tested independently outside of that function. These are now in
4250 separate 32-bit words, so there is plenty of room for expansion again.
4251 There is no change in the user interface or the logging behaviour.
4253 (b) When building, for example, log lines, the code previously used a
4254 macro that called string_cat() twice, in order to add two strings. This is
4255 not really sufficiently general. Furthermore, there was one instance where
4256 it was actually wrong because one of the argument was used twice, and in
4257 one call a function was used. (As it happened, calling the function twice
4258 did not affect the overall behaviour.) The macro has been replaced by a
4259 function that can join an arbitrary number of extra strings onto a growing
4262 (c) The code for expansion conditions now uses a table and a binary chop
4263 instead of a serial search (which was left over from when there were very
4264 few conditions). Also, it now recognizes conditions like "pam" even when
4265 the relevant support is not compiled in: a suitably worded error message is
4266 given if an attempt is made to use such a condition.
4268 11. Added ${time_interval:xxxxx}.
4270 12. A bug was causing one of the ddress fields not to be passed back correctly
4271 from remote delivery subprocesses. The field in question was not being
4272 subsequently used, so this caused to problems in practice.
4274 13. Added new log selectors queue_time and deliver_time.
4276 14. Might have fixed a bug in maildirsizefile handling that threw up
4277 "unexpected character" debug warnings, and recalculated the data
4278 unnecessarily. In any case, I expanded the warning message to give more
4281 15. Added the message "Restricted characters in address" to the statements in
4282 the default ACL that block characters like @ and % in local parts.
4284 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4285 Three changes have been made:
4287 (a) There was a serious bug; a negative response to MAIL caused the whole
4288 recipient domain to be cached as invalid, thereby blocking all messages
4289 to all local parts at the same domain, from all senders. This bug has
4290 been fixed. The domain is no longer cached after a negative response to
4291 MAIL if the sender used is not empty.
4293 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4296 (c) A new callout option, "use_sender" has been added for people who want
4297 the modified behaviour.
4303 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4306 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4307 indeed breaks things for older releases.
4309 3. Added additional logging to the case where there is a problem reading data
4310 from a filter that is running in a subprocess using a pipe, in order to
4311 try to track down a specific problem.
4313 4. Testing facility fudge: when running in the test harness and attempting
4314 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4315 getting "No route to host". Convert this to a timeout.
4317 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4320 6. Some OS don't have socklen_t but use size_t instead. This affects the
4321 fifth argument of getsockopt() amongst other things. This is now
4322 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4323 can be set for individual OS. I have set it for SunOS5, OSF1, and
4324 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4325 some earlier ones do not.
4327 7. Change 4.30/15 was not doing the test caselessly.
4329 8. The standard form for an IPv6 address literal was being rejected by address
4330 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4331 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4332 this, as well as the form without the "IPv6" on the front (but only when
4333 address literals are enabled, of course).
4335 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4337 10. Exim crashed if a message with an empty sender address specified by -f
4338 encountered a router with an errors_to setting. This could be provoked only
4339 by a command such as
4343 where an empty string was supplied; "<>" did not hit this bug.
4345 11. Installed PCRE release 4.5.
4347 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4348 remained set. It is now erased.
4350 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4351 times from message ids (which are base 36 rather than the normal 62).
4353 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4354 were being counted as actual protocol errors, and logged if the log
4355 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4356 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4357 and DATA following a set of rejected RCPTs do not count as protocol errors.
4358 In other words, Exim assumes they were pipelined, though this may not
4359 actually be the case. Of course, in all cases the client gets an
4360 appropriate error code.
4362 15. If a lookup fails in an ACL condition, a message about the failure may
4363 be available; it is used if testing the ACL cannot continue, because most
4364 such messages specify what the cause of the deferral is. However, some
4365 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4366 that caused an old message to be retained and used if a later statement
4367 caused a defer, replacing the real cause of the deferral.
4369 16. If an IP address had so many PTR records that the DNS lookup buffer
4370 was not large enough to hold them, Exim could crash while trying to process
4371 the truncated data. It now detects and logs this case.
4373 17. Further to 4.21/58, another change has been made: if (and only if) the
4374 first line of a message (the first header line) ends with CRLF, a bare LF
4375 in a subsequent header line has a space inserted after it, so as not to
4376 terminate the header.
4378 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4379 unnecessarily, used atoi() instead of strtol(), and didn't check the
4380 termination when getting file sizes from file names by regex.
4382 19. Completely re-implemented the support for maildirsize files, in the light
4383 of a number of problems with the previous contributed implementation
4384 (4.30/29). In particular:
4386 . If the quota is zero, the maildirsize file is maintained, but no quota is
4389 . If the maildir directory does not exist, it is created before any attempt
4390 to write a maildirsize file.
4392 . The quota value in the file is just a cache; if the quota is changed in
4393 the transport, the new value overrides.
4395 . A regular expression is available for excluding directories from the
4398 20. The autoreply transport checks the characters in options that define the
4399 message's headers; it allows continued headers, but it was checking with
4400 isspace() after an embedded newline instead of explicitly looking for a
4403 21. If all the "regular" hosts to which an address was routed had passed their
4404 expiry times, and had not reached their retry times, the address was
4405 bounced, even if fallback hosts were defined. Now Exim should go on to try
4408 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4409 equivalent code in the SMTP transport. Some hosts send humungous responses
4410 to HELO/EHLO, more than 1024 it seems.
4412 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4413 gives compiler warnings in some environments. I've now done it "properly",
4416 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4417 (because of problems with the built-in one) was declared to return uschar *
4418 instead of char *, causing compiler failure.
4420 25. Fixed a file descriptor leak when processing alias/forward files.
4422 26. Fixed a minor format string issue in dbfn.c.
4424 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4426 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4427 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4430 29. When a sender address is verified, it is cached, to save repeating the test
4431 when there is more than one recipient in a message. However, when the
4432 verification involves a callout, it is possible for different callout
4433 options to be set for different recipients. It is too complicated to keep
4434 track of this in the cache, so now Exim always runs a verification when a
4435 callout is required, relying on the callout cache for the optimization.
4436 The overhead is duplication of the address routing, but this should not be
4439 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4440 to be verified with callout=postmaster, and the main callout worked but the
4441 postmaster check failed, the verification correctly failed. However, if a
4442 subsequent RCPT command asked for sender verification *without* the
4443 postmaster check, incorrect caching caused this verification also to fail,
4446 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4447 it was not caching the DNS options (qualify_single, search_parents) that
4448 were used when the lookup failed. A subsequent lookup with different
4449 options therefore always gave the same answer, though there were cases
4450 where it should not have. (Example: a "domains = !$mx_any" option on a
4451 dnslookup router: the "domains" option is always processed without any
4452 widening, but the router might have qualify_single set.) Now Exim uses the
4453 cached value only when the same options are set.
4455 32. Added John Jetmore's "exipick" utility to the distribution.
4457 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4458 than a timeout (e.g. a certificate is required, and is not provided), an
4459 Exim server now closes the connection immediately. Previously it waited for
4460 the client to close - but if the client is SSL, it seems that they each
4461 wait for each other, leading to a delay before one of them times out.
4463 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4464 maintained 0.8.x compatibility because I don't think many are using it, and
4465 it is clearly obsolete.
4467 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4470 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4471 client certificate was expired. A simple patch fixes this, though I don't
4472 understand the full logic of why the verify callback is called multiple
4475 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4476 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4477 which causes problems with some clients (such as the Certicom SSL Plus
4478 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4479 disables the coutermeasure allowing Eudora to connect."
4481 38. Exim was not checking that a write() to a log file succeeded. This could
4482 lead to Bad Things if a log got too big, in particular if it hit a file
4483 size limit. Exim now panics and dies if it cannot write to a log file, just
4484 as it does if it cannot open a log file.
4486 39. Modified OS/Makefile-Linux so that it now contains
4488 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4490 The two -D definitions ensure that Exim is compiled with large file
4491 support, which makes it possible to handle log files that are bigger than
4494 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4495 instance) a domain was checked against a named list that involved a lookup,
4496 causing $domain_data to be set, then another domain was checked against the
4497 same list, then the first domain was re-checked, the value of $domain_data
4498 after the final check could be wrong. In particular, if the second check
4499 failed, it could be set empty. This bug probably also applied to
4502 41. The strip_trailing_dot option was not being applied to the address given
4503 with the -f command-line option.
4505 42. The code for reading a message's header from the spool was incrementing
4506 $received_count, but never initializing it. This meant that the value was
4507 incorrect (doubled) while delivering a message in the same process in which
4508 it was received. In the most common configuration of Exim, this never
4509 happens - a fresh exec is done - but it can happen when
4510 deliver_drop_privilege is set.
4512 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4513 it now includes up to 150 characters of the unexpected data in the log
4516 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4517 and building data strings. The size of both of these buffers was 10 000
4518 bytes - far larger than anybody would *ever* want, thought I. Needless to
4519 say, somebody hit the limit. I have increased the maximum line length to
4520 20 000 and the maximum data length of concatenated lines to 100 000. I have
4521 also fixed two bugs, because there was no checking on these buffers. Tsk,
4522 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4523 buffer is too small.
4525 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4526 lsearch lookups. Now it does.
4528 46. When parsing a route_list item in a manualroute router, a fixed-length
4529 buffer was used for the list of hosts. I made this 1024 bytes long,
4530 thinking that nobody would ever have a list of hosts that long. Wrong.
4531 Somebody had a whole pile of complicated expansion conditions, and the
4532 string was silently truncated, leading to an expansion error. It turns out
4533 that it is easier to change to an unlimited length (owing to other changes
4534 that have happened since this code was originally written) than to build
4535 structure for giving a limitation error. The length of the item that
4536 expands into the list of hosts is now unlimited.
4538 47. The lsearch lookup could not handle data where the length of text line was
4539 more than 4095 characters. Such lines were truncated, leading to shortened
4540 data being returned. It should now handle lines of any length.
4542 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4543 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4546 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4547 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4548 no longer happens in comment lines. A list of replacements is now placed
4549 at the head of all of the source files, except those whose only change is
4550 to replace PERL_COMMAND in the very first #! line.
4552 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4553 messages on the queue, with a bottom-up merge sort, using code contributed
4554 by Michael Haardt. This should make operations like -bp somewhat faster on
4555 large queues. It won't affect queue runners, except when queue_run_in_order
4558 51. Installed eximstats 1.31 in the distribution.
4560 52. Added support for SRV lookups to the dnslookup router.
4562 53. If an ACL referred to $message_body or $message_body_end, the value was not
4563 reset for any messages that followed in the same SMTP session.
4565 54. The store-handling optimization for building very long strings was not
4566 differentiating between the different store pools. I don't think this
4567 actually made any difference in practice, but I've tidied it.
4569 55. While running the routers to verify a sender address, $sender_address
4570 was still set to the sender address. This is wrong, because when routing to
4571 send a bounce to the sender, it would be empty. Therefore, I have changed
4572 it so that, while verifying a sender address, $sender_address is set to <>.
4573 (There is no change to what happens when verifying a recipient address.)
4575 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4576 target A or AAAA records (if not already returned) without resetting the
4577 qualify_single or search_parents options of the DNS resolver. These are
4578 inappropriate in this case because the targets of MX and SRV records must
4579 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4580 target that, when qualified, matched something in the local domain. These
4581 two options are now turned off when doing these lookups.
4583 57. It seems that at least some releases of Reiserfs (which does not have the
4584 concept of a fixed number of inodes) returns zero and not -1 for the
4585 number of available inodes. This interacted badly with check_spool_inodes,
4586 which assumed that -1 was the "no such thing" setting. What I have done is
4587 to check that the total number of inodes is greater than zero before doing
4588 the test of how many are available.
4590 58. When a "warn" ACL statement has a log_message modifier, the message is
4591 remembered, and not repeated. This is to avoid a lot of repetition when a
4592 message has many recipients that cause the same warning to be written.
4593 Howewer, Exim was preserving the list of already written lines for an
4594 entire SMTP session, which doesn't seem right. The memory is now reset if a
4595 new message is started.
4597 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4598 debugging output unless log_rewrite was also set.
4600 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4601 of (int)(handle) when we know that handle contains (void *)(-1).
4603 61. The Exim daemon panic-logs an error return when it closes the incoming
4604 connection. However "connection reset by peer" seems to be common, and
4605 isn't really an error worthy of noting specially, so that particular error
4608 62. When Exim is trying to find all the local interfaces, it used to panic and
4609 die if the ioctl to get the interface flags failed. However, it seems that
4610 on at least one OS (Solaris 9) it is possible to have an interface that is
4611 included in the list of interfaces, but for which you get a failure error
4612 for this call. This happens when the interface is not "plumbed" into a
4613 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4614 failure of the "get flags" call assumes that the interface is down.
4616 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4617 makes life easier for people who are doing arithmetic on fields extracted
4618 from dates, where you often get leading zeros that should not be
4619 interpreted as octal.
4621 64. Added qualify_domain to the redirect router, to override the global
4624 65. If a pathologically long header line contained very many addresses (the
4625 report of this problem mentioned 10 000) and each of them was rewritten,
4626 Exim could use up a very large amount of memory. (It kept on making new
4627 copies of the header line as it rewrote, and never released the old ones.)
4628 At the expense of a bit more processing, the header rewriting function has
4629 been changed so that it no longer eats memory in this way.
4631 66. The generation of the Received: header has been moved from the time that a
4632 message starts to be received, to the time that it finishes. The timestamp
4633 in the Received: header should now be very close to that of the <= log
4634 line. There are two side-effects of this change:
4636 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4637 logged header lines no longer include the local Received: line, because
4638 it has not yet been created. The same applies to a copy of the message
4639 that is returned to a non-SMTP sender when a message is rejected.
4641 (b) When a filter file is tested using -bf, no additional Received: header
4642 is added to the test message. After some thought, I decided that this
4645 This change does not affect the value of $received_for. It is still set
4646 after address rewriting, but before local_scan() is called.
4648 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4650 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4651 gave an unhelpful panic error message, and a defer error. I have managed to
4652 change this behaviour so that it now rejects any supplied certificate,
4653 which seems right, as the list of acceptable certificates is empty.
4655 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4656 gave an unhelpful defer error. I have not managed to make this reject any
4657 supplied certificates, but the error message it gives is "no certificate
4658 supplied", which is not helpful.
4660 70. exigrep's output now also includes lines that are not associated with any
4661 message, but which match the given pattern. Implemented by a patch from
4662 Martin Sluka, which also tidied up the Perl a bit.
4664 71. Recipient callout verification, like sender verification, was using <> in
4665 the MAIL FROM command. This isn't really the right thing, since the actual
4666 sender may affect whether the remote host accepts the recipient or not. I
4667 have changed it to use the actual sender in the callout; this means that
4668 the cache record is now keyed on a recipient/sender pair, not just the
4669 recipient address. There doesn't seem to be a real danger of callout loops,
4670 since a callout by the remote host to check the sender would use <>.
4671 [SEE ABOVE: changed after hitting problems.]
4673 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4674 temporary errors. However, in the case of such a code being given after
4675 the end of a data transmission (i.e. after ".") Exim was failing to write
4676 a retry record for the message. (Yes, there was some broken host that was
4677 actually sending 8xx at this point.)
4679 73. An unknown lookup type in a host list could cause Exim to panic-die when
4680 the list was checked. (An example that provoked this was putting <; in the
4681 middle of a list instead of at the start.) If this happened during a DATA
4682 ACL check, a -D file could be left lying around. This kind of configuration
4683 error no longer causes Exim to die; instead it causes a defer errror. The
4684 incident is still logged to the main and panic logs.
4686 74. Buglet left over from Exim 3 conversion. The message "too many messages
4687 in one connection" was written to the rejectlog but not the mainlog, except
4688 when address rewriting (yes!) was being logged.
4690 75. Added write_rejectlog option.
4692 76. When a system filter was run not as root (that is, when system_filter_user
4693 was set), the values of the $n variables were not being returned to the
4694 main process; thus, they were not subsequently available in the $sn
4697 77. Added +return_path_on_delivery log selector.
4699 78. A connection timeout was being treated differently from recipients deferred
4700 when testing hosts_max_try with a message that was older than the host's
4701 retry timeout. (The host should not be counted, thus allowing all hosts to
4702 be tried at least once before bouncing.) This may have been the cause of an
4703 occasionally reported bug whereby a message would remain on the queue
4704 longer than the retry timeout, but would be bounced if a delivery was
4705 forced. I say "may" because I never totally pinned down the problem;
4706 setting up timeout/retry tests is difficult. See also the next item.
4708 79. The ultimate address timeout was not being applied to errors that involved
4709 a combination of host plus message (for example, a timeout on a MAIL
4710 command). When an address resolved to a number of possible hosts, and they
4711 were not all tried for each delivery (e.g. because of hosts_max_try), a
4712 message could remain on the queue longer than the retry timeout.
4714 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4717 81. Fixed an obscure SMTP outgoing bug which required at least the following
4718 conditions: (a) there was another message waiting for the same server;
4719 (b) the server returned 5xx to all RCPT commands in the first message so
4720 that the message was not completed; (c) the server dropped the connection
4721 or gave a negative response to the RSET that Exim sends to abort the
4722 transaction. The observed case was a dropped connection after DATA that had
4723 been sent in pipelining mode. That is, the server had advertised PIPELINING
4724 but was not implementing it correctly. The effect of the bug was incorrect
4725 behaviour, such as trying another host, and this could lead to a crash.
4731 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4732 and daemon.c were passed as pointers to ints; they should have been
4733 pointers to socklen_t variables (which are typically unsigned ints).
4735 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4738 3. Fixed a really odd bug that affected only the testing scheme; patching a
4739 certain fixed string in the binary changed the value of another string that
4740 happened to be identical to the end of the original first string.
4742 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4743 name", it returns that address as the IP address. On some operating
4744 systems (e.g. Solaris), it also passes back the IP address string as the
4745 "host name". However, on others (e.g. Linux), it passes back an empty
4746 string. Exim wasn't checking for this, and was changing the host name to an
4747 empty string, assuming it had been canonicized.
4749 5. Although rare, it is permitted to have more than one PTR record for a given
4750 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4751 all the names associated with an address, because they do in Solaris.
4752 However, it seems that they do not in Linux for data that comes from the
4753 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4754 I found this out when I moved to a new Linux workstation and tried to run
4755 the Exim test suite.
4757 To get round this problem I have changed the code so that it now does its
4758 own call to the DNS to look up PTR records when searching for a host name.
4759 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4760 addresses that are only in /etc/hosts are still found.
4762 This behaviour is, however, controlled by an option called host_lookup_
4763 order, which defaults to "bydns:byaddr". If people want to use the other
4764 order, or indeed, just use one or the other means of lookup, they can
4765 specify it in this variable.
4767 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4768 some operating systems, this comes back from gethostbyaddr() as an empty
4769 string, and this is what Exim used to test for. However, it seems that in
4770 other systems, "." is yielded. Exim now tests for this case too.
4772 7. The values of check_spool_space and check_log_space are now held internally
4773 as a number of kilobytes instead of an absolute number of bytes. If a
4774 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4775 kilobyte. This means that much larger values can be stored.
4777 8. Exim monitor: an attempt to get the action menu when not actually pointing
4778 at a message produces an empty menu entitled "No message selected". This
4779 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4780 no entries in it ("Shell widget menu has zero width and/or height"). So I
4781 have added a single, blank menu entry in this case.
4783 9. Added ${quote_local_part.
4785 10. MIME decoding is now applied to the contents of Subject: header lines when
4788 11. Now that a reference to $sender_host_address automatically causes a reverse
4789 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4790 host lookup before query-style lookups in lists that might use this
4791 variable. This has therefore been abolished, and the "net-" prefix is no
4792 longer necessary for query-style lookups.
4794 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4795 have been a typo for LFLAGS, so it has been changed.
4797 13. The install script calls Exim with "-C /dev/null" in order to find the
4798 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4799 to be output. Howeve, since Exim outputs its version number before the
4800 error, it didn't break the script. It just looked ugly. I fixed this by
4801 always allowing "-C /dev/null" if the caller is root.
4803 14. Ignore overlarge ACL variable number when reading spool file - insurance
4804 against a later release with more variables having written the file.
4806 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4807 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4808 this, as well as the form without the "IPv6" on the front.
4810 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4811 OS/Makefile-Darwin file.
4813 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4814 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4816 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4817 variable. However, some OS use ints for inodes. I've added cast to long int
4818 to get rid of the compiler warning.
4820 19. I had forgotten to lock out "/../" in configuration file names when
4821 ALT_CONFIG_PREFIX was set.
4823 20. Routers used for verification do not need to specify transports. However,
4824 if such a router generated a host list, and callout was configured, Exim
4825 crashed, because it could not find a port number from the (non-existent)
4826 transport. It now assumes port 25 in this circumstance.
4828 21. Added the -t option to exigrep.
4830 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4831 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4832 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4833 them is set, LOOKUP_LSEARCH is forced.
4835 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4837 24. Added sender and host information to the "rejected by local_scan()" log
4838 line; previously there was no indication of these.
4840 25. Added .include_if_exists.
4842 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4843 Linux. It turns out that not all file systems support this. Apparently some
4844 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4845 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4846 not supported on the file descriptor, is now ignored when Exim is trying to
4847 sync a directory. This applies only to Linux.
4849 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4851 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4852 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4855 29. Added support for maildirsize files from supplied patch (modified a bit).
4857 30. The use of :fail: followed by an empty string could lead Exim to respond to
4858 sender verification failures with (e.g.):
4860 550 Verification failed for <xxx>
4861 550 Sender verify failed
4863 where the first response line was missing the '-' that indicates it is not
4864 the final line of the response.
4866 31. The loop for finding the name of the user that called Exim had a hardwired
4867 limit of 10; it now uses the value of finduser_retries, which is used for
4868 all other user lookups.
4870 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4873 33. Exim was neglecting to zero errno before one call of strtol() when
4874 expanding a string and expecting an integer value. On some systems this
4875 resulted in spurious "integer overflow" errors. Also, it was casting the
4876 result into an int without checking.
4878 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4879 did not work. The code looks as if it has *never* worked, though it appears
4880 to have been documented since at least releast 1.62. I have made it work.
4882 35. The "timeout_DNS" error in retry rules, also documented since at least
4883 1.62, also never worked. As it isn't clear exactly what this means, and
4884 clearly it isn't a major issue, I have abolished the feature by treating it
4885 as "timeout", and writing a warning to the main and panic logs.
4887 36. The display of retry rules for -brt wasn't always showing the error code
4890 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4891 timeout_connect_A, timeout_connect_MX.
4893 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4894 to the empty sender.
4896 39. The daemon was not analysing the content of -oX till after it had closed
4897 stderr and disconnected from the controlling terminal. This meant that any
4898 syntax errors were only noted on the panic log, and the return code from
4899 the command was 0. By re-arranging the code a little, I've made the
4900 decoding happen first, so such errors now appear on stderr, and the return
4901 code is 1. However, the actual setting up of the sockets still happens in
4902 the disconnected process, so errors there are still only recorded on the
4905 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4906 connections (as happens on some IP stacks) was logged at start up time as
4907 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4908 it from "IPv6 and IPv4", which means that two separate sockets are being
4911 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4912 says whether AF_INET or AF_INET6 was passed as an argument.
4914 42. Exiwhat output was messed up when time zones were included in log
4917 43. Exiwhat now gives more information about the daemon's listening ports,
4918 and whether -tls-on-connect was used.
4920 44. The "port" option of the smtp transport is now expanded.
4922 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4923 silently ignored. Now an error message is written to the main and panic
4926 46. There's a new ACL modifier called "logwrite" which writes to a log file
4927 as soon as it is encountered.
4929 47. Added $local_user_uid and $local_user_gid at routing time.
4931 48. Exim crashed when trying to verify a sender address that was being
4934 49. Exim was recognizing only a space character after ".include". It now also
4935 recognizes a tab character.
4937 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4938 extracting the relevant information from the specification. The man page no
4939 longer contains scrambled data for the -d option, and I've added a section
4940 at the front about calling Exim under different names.
4942 51. Added "extra_headers" argument to the "mail" command in filter files.
4944 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4947 53. Installed eximstats 1.29.
4949 54. Added transport_filter_timeout as a generic transport option.
4951 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4952 Cc: header lines. This was required by RFC 822, but it not required by RFC
4955 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4956 incoming messages that did not have them. Now it does so only if the
4957 message originates locally, that is, if there is no associated remote host
4958 address. When Resent- header lines are present, this applies to the Resent-
4959 lines rather than the non-Resent- lines.
4961 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4962 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4964 58. Messages for configuration errors now include the name of the main
4965 configuration file - useful now that there may be more than one file in a
4966 list (.included file names were always shown).
4968 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4969 for those rare installations that do not start the daemon as root or run it
4970 setuid root. I've cut out the call to initgroups() if the daemon is not
4973 60. The Exim user and group can now be bound into the binary as text strings
4974 that are looked up at the start of Exim's processing.
4976 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4978 62. Added $mailstore_basename variable.
4980 63. Installed patch to sieve.c from Michael Haardt.
4982 64. When Exim failed to open the panic log after failing to open the main log,
4983 the original message it was trying to log was written to stderr and debug
4984 output, but if they were not available (the usual case in production), it
4985 was lost. Now it is written to syslog before the two lines that record the
4986 failures to open the logs.
4988 65. Users' Exim filters run in subprocesses under the user's uid. It is
4989 possible for a "deliver" command or an alias in a "personal" command to
4990 provoke an address rewrite. If logging of address rewriting is configured,
4991 this fails because the process is not running as root or exim. There may be
4992 a better way of dealing with this, but for the moment (because 4.30 needs
4993 to be released), I have disabled address rewrite logging when running a
4994 filter in a non-root, non-exim process.
5000 1. The buildconfig auxiliary program wasn't quoting the value set for
5001 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5002 not defined. This bug was masked in 4.22 by the effect that was fixed in
5005 2. Some messages that were rejected after a message id was allocated were
5006 shown as "incomplete" by exigrep. It no longer does this for messages that
5007 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5009 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5010 have allow_domain_literals set, the ID did not get logged in the <= line.
5011 Domain literals are now always recognized in Message-ID: header lines.
5013 4. The first argument for a ${extract expansion item is the key name or field
5014 number. Leading and trailing spaces in this item were not being ignored,
5015 causing some misleading effects.
5017 5. When deliver_drop_privilege was set, single queue runner processes started
5018 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5019 same command in the process it spins off) were not dropping privilege.
5021 6. When the daemon running as "exim" started a queue runner, it always
5022 re-executed Exim in the spun-off process. This is a waste of effort when
5023 deliver_drop_privilege is set. The new process now just calls the
5024 queue-runner function directly.
5030 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5033 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5034 ignored. Though the use of -oP was forcing the writing of a pid file, it
5035 was always written to the default place.
5037 3. If the message "no IP address found for host xxxx" is generated during
5038 incoming verification, it is now followed by identification of the incoming
5039 connection (so you can more easily find what provoked it).
5041 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5043 5. Added some features to "harden" Exim a bit more against certain attacks:
5045 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5046 be put in Local/Makefile. This is like the never_users runtime option,
5047 but it cannot be overridden. The default setting is "root".
5049 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5050 prefix string with which any file named in a -C command line option
5053 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5054 is retained for -C and -D only if the caller of Exim is root. Without
5055 it, the exim user may also use -C and -D and retain privilege.
5057 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5058 command line option is disabled.
5060 6. Macro names set by the -D option must start with an upper case letter, just
5061 like macro names defined in the configuration file.
5063 7. Added "dereference=" facility to LDAP.
5065 8. Two instances of the typo "uknown" in the source files are fixed.
5067 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5068 the Configure-Makefile script screwed up while processing it.
5070 10. Incorporated PCRE 4.4.
5072 11. The SMTP synchronization check was not operating right at the start of an
5073 SMTP session. For example, it could not catch a HELO sent before the client
5074 waited for the greeting. There is now a check for outstanding input at the
5075 point when the greeting is written. Because of the duplex, asynchronous
5076 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5077 way, but not yet received, when the check is performed.
5079 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5080 on TCP/IP sockets, because this apparently causes some broken clients to
5083 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5084 unchanged) from the Cygwin maintainer.
5086 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5087 was supported instead of testing for mbx. Effectively a typo.
5089 15. The spa authenticator server code was not checking that the input it
5090 received was valid base64.
5092 16. The debug output line for the "set" modifier in ACLs was not showing the
5093 name of the variable that was being set.
5095 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5097 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5098 lookup on its own. Something else was needed to trigger the lookup. For
5099 example, a match in host_lookup or the need for a host name in a host list.
5100 Now, if $sender_host_name is referenced and the host name has not yet been
5101 looked up, a lookup is performed. If the lookup fails, the variable remains
5102 empty, and $host_lookup_failed is set to "1".
5104 19. Added "eqi" as a case-independent comparison operator.
5106 20. The saslauthd authentication condition could segfault if neither service
5107 nor realm was specified.
5109 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5110 error message that was logged was misleading, and incoming SMTP
5111 connections were dropped. The message is now more accurate, and temporary
5112 errors are given to SMTP connections.
5114 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5115 (except RSET) with a 421 error, until QUIT is received. However, it was
5116 failing to send a response to QUIT.
5118 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5119 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5120 ACL is now run after the helo_try_verify_hosts code.
5122 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5123 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5124 case-independent, so other case variants are also recognized). Apparently
5125 some systems use these upper case variants.
5127 25. If more than two messages were waiting for the same host, and a transport
5128 filter was specified for the transport, Exim sent two messages over the
5129 same TCP/IP connection, and then failed with "socket operation on non-
5130 socket" when it tried to send the third.
5132 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5134 27. The extern definition of crypt16() in expand.c was not being excluded when
5135 the OS had its own crypt16() function.
5137 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5138 as a preferred synonym for return_size_limit, both as an option and as an
5141 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5143 30. Changed the default configuration ACL to relax the local part checking rule
5144 for addresses that are not in any local domains. For these addresses,
5145 slashes and pipe symbols are allowed within local parts, but the sequence
5146 /../ is explicitly forbidden.
5148 31. SPA server authentication was not clearing the challenge buffer before
5151 32. log_message in a "warn" ACL statement was writing to the reject log as
5152 well as to the main log, which contradicts the documentation and doesn't
5153 seem right (because no rejection is happening). So I have stopped it.
5155 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5156 However, I am unable to do any testing of this.
5158 34. Fixed an infelicity in the appendfile transport. When checking directories
5159 for a mailbox, to see if any needed to be created, it was accidentally
5160 using path names with one or more superfluous leading slashes; tracing
5161 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5163 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5164 contents are added to the log line that is written for every discarded
5165 recipient. (Previously a log_message setting was ignored.)
5167 36. The ${quote: operator now quotes the string if it is empty.
5169 37. The install script runs exim in order to find its version number. If for
5170 some reason other than non-existence or emptiness, which it checks, it
5171 could not run './exim', it was installing it with an empty version number,
5172 i.e. as "exim-". This error state is now caught, and the installation is
5175 38. An argument was missing from the function that creates an error message
5176 when Exim fails to connect to the socket for saslauthd authentication.
5177 This could cause Exim to crash, or give a corrupted message.
5179 39. Added isip, isip4, and isip6 to ${if conditions.
5181 40. The ACL variables $acl_xx are now saved with the message, and can be
5182 accessed later in routers, transports, and filters.
5184 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5185 strings in the file are not string-expanded.
5187 42. If a MAIL command specified a SIZE value that was too large to fit into an
5188 int variable, the check against message_size_limit failed. Such values are
5189 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5190 day this will have to be increased, but I don't think I want to be around
5191 when emails are that large.
5198 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5199 iconv() is not standard in FreeBSD.
5201 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5202 IPv6 enabled. The observed symptom was a segmentation fault on return from
5203 the function os_common_find_running_interfaces() in src/os.c.
5205 3. In the check_special_case() function in daemon.c I had used "errno" as an
5206 argument name, which causes warnings on some systems. This was basically a
5207 typo, since it was named "eno" in the comments!
5209 4. The code that waits for the clock to tick (at a resolution of some fraction
5210 of a second) so as to ensure message-id uniqueness was always waiting for
5211 at least one whole tick, when it could have waited for less. [This is
5212 almost certainly not relevant at current processor speeds, where it is
5213 unlikely to ever wait at all. But we try to future-proof.]
5215 5. The function that sleeps for a time interval that includes fractions of a
5216 second contained a race. It did not block SIGALRM between setting the
5217 timer, and suspending (a couple of lines later). If the interval was short
5218 and the sigsuspend() was delayed until after it had expired, the suspension
5219 never ended. On busy systems this could lead to processes getting stuck for
5222 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5223 process, before it forks any delivery processes. The open lookup caching
5224 mechanism meant that the open file or database connection was passed into
5225 the delivery process. The problem was that delivery processes always tidy
5226 up cached lookup data. This could cause a problem for the next delivery
5227 process started by the queue runner, because the external queue runner
5228 process does not know about the closure. So the next delivery process
5229 still has data in the lookup cache. In the case of a file lookup, there was
5230 no problem because closing a file descriptor in a subprocess doesn't affect
5231 the parent. However, if the lookup was caching a connection to a database,
5232 the connection was closed, and the second delivery process was likely to
5233 see errors such as "PGSQL: query failed: server closed the connection
5234 unexpectedly". The problem has been fixed by closing all cached lookups
5235 in a queue runner before running a delivery process.
5237 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5238 seem to have the "const" qualifier which it has on other OS. I've
5241 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5242 *of the same type* (client or server) with the same public name that an
5243 error should be diagnosed.
5245 9. When Exim looked up a host name for an IP address, but failed to find the
5246 original IP address when looking up the host name (a safety check), it
5247 output the message "<ip address> does not match any IP for NULL", which was
5248 confusing, to say the least. The bug was that the host name should have
5249 appeared instead of "NULL".
5251 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5252 user that is built into the binary, and the -C or -D options is used, root
5253 privilege is dropped before the configuration file is read. In addition,
5254 logging is switched to stderr instead of the normal log files. If the
5255 configuration then re-defines the Exim user, the unprivileged environment
5256 is probably not what is expected, so Exim logs a panic warning message (but
5259 However, if deliver_drop_privilege is set, the unprivileged state may well
5260 be exactly what is intended, so the warning has been cut out in that case,
5261 and Exim is allowed to try to write to its normal log files.
5267 1. smtp_return_error_details was not giving details for temporary sender
5268 or receiver verification errors.
5270 2. Diagnose a configuration error if two authenticators have the same public
5273 3. Exim used not to create the message log file for a message until the first
5274 delivery attempt. This could be confusing when incoming messages were held
5275 for policy or load reasons. The message log file is now created at the time
5276 the message is received, and an initial "Received" line is written to it.
5278 4. The automatically generated man page for command line options had a minor
5279 bug that caused no ill effects; however, a more serious problem was that
5280 the procedure for building the man page automatically didn't always
5281 operate. Consequently, release 4.20 contains an out-of-date version. This
5282 shouldn't happen again.
5284 5. When building Exim with embedded Perl support, the script that builds the
5285 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5286 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5288 6. The freeze_tell option was not being used for messages that were frozen on
5289 arrival, either by an ACL or by local_scan().
5291 7. Added the smtp_incomplete_transaction log selector.
5293 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5294 was accepting AUTH without a new EHLO.
5296 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5297 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5300 10. Logging of TCP/IP connections (when configured) now happens in the main
5301 daemon process instead of the child process, so that the TCP/IP connection
5302 count is more accurate (but it can never be perfect).
5304 11. The use of "drop" in a nested ACL was not being handled correctly in the
5305 outer ACL. Now, if condition failure induced by the nested "drop" causes
5306 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5307 or "require"), the connection is dropped.
5309 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5310 that yield "discard" can now be used with an "accept" or a "discard" verb,
5311 but an error is generated for any others (because I can't see a useful way
5312 to define what should happen).
5314 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5315 are now processed in the same way as lines in the Exim configuration file.
5316 In particular, continuation lines are supported.
5318 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5320 15. Added -ti meaning -t -i.
5322 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5323 domains, and warn by logging if others are found.
5325 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5326 returned from GIFCONF when Exim is trying to find the list of interfaces on
5327 a host. The code in os.c has been modified to copy each ifreq to an aligned
5328 structure in all cases.
5330 Also, in some cases, the returned ifreq's were being copied to a 'struct
5331 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5332 means the last couple of bytes of an IPv6 address could be chopped if the
5333 ifreq contained only a normal sockaddr (14 bytes storage).
5335 18. Named domain lists were not supported in the hosts_treat_as_local option.
5336 An entry such as +xxxx was not recognized, and was treated as a literal
5339 19. Ensure that header lines added by a DATA ACL are included in the reject log
5340 if the ACL subsequently rejects the message.
5342 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5343 MD5 (which is deprecated).
5345 21. When testing a filter file using -bf, Exim was writing a message when it
5346 took the sender from a "From " line in the message, but it was not doing so
5347 when it took $return_path from a Return-Path: header line. It now does.
5349 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5350 with a valid header line field name (a series of printing characters
5351 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5353 23. Changed "disc" in the source to "disk" to conform to the documentation and
5354 the book and for uniformity.
5356 24. Ignore Sendmail's -Ooption=value command line item.
5358 25. When execve() failed while trying to run a command in a pipe transport,
5359 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5360 could be confused with a return value of 69 from the command itself. This
5361 has been changed to 127, the value the shell returns if it is asked to run
5362 a non-existent command. The wording for the related log line suggests a
5363 non-existent command as the problem.
5365 26. If received_header_text expands to an empty string, do not add a Received:
5366 header line to the message. (Well, it adds a token one on the spool, but
5367 marks it "old" so that it doesn't get used or transmitted.)
5369 27. Installed eximstats 1.28 (addition of -nt option).
5371 28. There was no check for failure on the call to getsockname() in the daemon
5372 code. This can fail if there is a shortage of resources on the system, with
5373 ENOMEM, for example. A temporary error is now given on failure.
5375 29. Contrary to the C standard, it seems that in some environments, the
5376 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5377 program. Exim now does this explicitly; it affects the formatting of
5378 timestamps using strftime().
5380 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5381 complaints. I've now initialized all the variables, to avoid this.
5383 32. Header lines added by a system filter were not being "seen" during
5384 transport-time rewrites.
5386 33. The info_callback() function passed to OpenSSL is set up with type void
5387 (*)(SSL *, int, int), as described somewhere. However, when calling the
5388 function (actually a macro) that sets it up, the type void(*)() is
5389 expected. I've put in a cast to prevent warnings from picky compilers.
5391 34. If a DNS black list lookup found a CNAME record, but there were no A
5392 records associated with the domain it pointed at, Exim crashed.
5394 35. If a DNS black list lookup returned more than one A record, Exim ignored
5395 all but the first. It now scans all returned addresses if a particular IP
5396 value is being sought. In this situation, the contents of the
5397 $dnslist_value variable are a list of all the addresses, separated by a
5400 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5401 to accept a host name and all its aliases if the forward lookup for any of
5402 them yielded the IP address of the incoming connection. Now it accepts only
5403 those names whose forward lookup yields the correct IP address. Any other
5404 names are discarded. This closes a loophole whereby a rogue DNS
5405 administrator could create reverse DNS records to break through a
5406 wildcarded host restriction in an ACL.
5408 37. If a user filter or a system filter that ran in a subprocess used any of
5409 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5410 the wrong values were passed to the pipe command ($thisaddress had the
5411 value of $0, $0 had the value of $1, etc). This bug was introduced by
5412 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5414 38. Improved the line breaking for long SMTP error messages from ACLs.
5415 Previously, if there was no break point between 40 and 75 characters, Exim
5416 left the rest of the message alone. Two changes have been made: (a) I've
5417 reduced the minimum length to 35 characters; (b) if it can't find a break
5418 point between 35 and 75 characters, it looks ahead and uses the first one
5419 that it finds. This may give the occasional overlong line, but at least the
5420 remaining text gets split now.
5422 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5423 file descriptors might be low, and that setting 1000 would always raise it.
5424 It turns out that in some environments, the limit is already over 1000 and
5425 that lowering it causes trouble. So now Exim takes care not to decrease it.
5427 40. When delivering a message, the value of $return_path is set to $sender_
5428 address at the start of routing (routers may change the value). By an
5429 oversight, this default was not being set up when an address was tested by
5430 -bt or -bv, which affected the outcome if any router or filter referred to
5433 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5434 log only when "message" or "log_message" are set. However, if one of the
5435 conditions was an address verification, or a call to a nested ACL, the
5436 messages generated by the underlying test were being passed through. This
5437 no longer happens. The underlying message is available in $acl_verify_
5438 message for both "message" and "log_message" expansions, so it can be
5439 passed through if needed.
5441 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5442 new expansion $bh_ to give the encoded byte string without charset
5443 translation. Translation happens only if iconv() is available; HAVE_ICONV
5444 indicates this at build time. HEADERS_CHARSET gives the charset to
5445 translate to; headers_charset can change it in the configuration, and
5446 "headers charset" can change it in an individual filter file.
5448 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5449 that creates RFC 2047 encoded "words" labels them as that charset instead
5450 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5451 expansion operator; (ii) when Exim creates a From: line for a local
5452 message; (iii) when a header line is rewritten to include a "phrase" part.
5454 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5455 buggy, causing it to skip the first lines of messages whose message ID
5456 ended in 'D'. This would not have bitten before Exim release 4.14, because
5457 message IDs were unlikely to end in 'D' before then. The effect was to have
5458 incorrect size information for certain domains.
5460 45. #include "config.h" was missing at the start of the crypt16.c module. This
5461 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5464 46. If there was a timeout during a "random" callout check, Exim treated it as
5465 a failure of the random address, and carried on sending RSET and the real
5466 address. If the delay was just some slowness somewhere, the response to the
5467 original RCPT would be taken as a response to RSET and so on, causing
5468 mayhem of various kinds.
5470 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5471 when I implemented it. It didn't allow for the fact that some option values
5472 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5473 the right test for positive values.
5475 48. Domain names in DNS records are case-independent. Exim always looks them up
5476 in lower case. Some resolvers return domain names in exactly the case they
5477 appear in the zone file, that is, they may contain uppercase letters. Not
5478 all resolvers do this - some return always lower case. Exim was treating a
5479 change of case by a resolver as a change of domain, similar to a widening
5480 of a domain abbreviation. This triggered its re-routing code and so it was
5481 trying to route what was effectively the same domain again. This normally
5482 caused routing to fail (because the router wouldn't handle the domain
5483 twice). Now Exim checks for this case specially, and just changes the
5484 casing of the domain that it ultimately uses when it transmits the message
5487 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5490 50. If a filter generated a file delivery with a non-absolute name (possible if
5491 no home directory exists for the router), the forbid_file option was not
5494 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5495 the existing equality matching.
5497 52. Exim was using ints instead of ino_t variables in some places where it was
5498 dealing with inode numbers.
5500 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5501 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5502 called TMPDIR, and if it finds it is different, it changes its value.
5504 54. The smtp_printf() function is now made available to local_scan() so
5505 additional output lines can be written before returning. There is also an
5506 smtp_fflush() function to enable the detection of a dropped connection.
5507 The variables smtp_input and smtp_batched_input are exported to
5510 55. Changed the default runtime configuration: the message "Unknown user"
5511 has been removed from the ACL, and instead placed on the localuser router,
5512 using the cannot_route_message feature. This means that any verification
5513 failures that generate their own messages won't get overridden. Similarly,
5514 the "Unrouteable address" message that was in the ACL for unverifiable
5515 relay addresses has also been removed.
5517 56. Added hosts_avoid_esmtp to the smtp transport.
5519 57. The exicyclog script was not checking for the esoteric option
5520 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5521 will work only if exicyclog is run under the appropriate euid.
5523 58. Following a discussion on the list, the rules by which Exim recognises line
5524 endings on incoming messages have been changed. The -dropcr and drop_cr
5525 options are now no-ops, retained only for backwards compatibility. The
5526 following line terminators are recognized: LF CRLF CR. However, special
5527 processing applies to CR:
5529 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5530 nor a local message in the state where . is a terminator.
5532 (ii) If a bare CR is encountered in a header line, an extra space is added
5533 after the line terminator so as not to end the header. The reasoning
5534 behind this is that bare CRs in header lines are most likely either
5535 to be mistakes, or people trying to play silly games.
5537 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5538 was being incorrectly given as 18 bytes larger than it should have been.
5539 This is a VOB (very old bug).
5541 60. This may never have affected anything current, but just in case it has:
5542 When the local host is found other than at the start of a list of hosts,
5543 the local host, those with the same MX, and any that follow, are discarded.
5544 When the list in question was part of a longer list of hosts, the following
5545 hosts (not currently being processed) were also being discarded. This no
5546 longer happens. I'm not sure if this situation could ever has previously
5549 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5552 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5553 header. This is something that is recommended in a new Internet Draft, and
5554 is something that is documented as being done by Sendmail. There are two
5555 possible values. For messages generated by the autoreply transport, Exim
5558 Auto-Submitted: auto-replied
5560 whereas for all other generated messages (e.g. bounces) it adds
5562 Auto-Submitted: auto-generated
5564 63. The "personal" condition in filters now includes a test for the
5565 Auto-Submitted: header. If it contains the string "auto-" the message it
5566 not considered personal.
5568 64. Added rcpt_include_affixes as a generic transport option.
5570 65. Added queue_only_override (default true).
5572 66. Added the syslog_duplication option.
5574 67. If what should have been the first header line of a message consisted of
5575 a space followed by a colon, Exim was mis-interpreting it as a header line.
5576 It isn't of course - it is syntactically invalid and should therefore be
5577 treated as the start of the message body. The misbehaviour could have
5578 caused a number of strange effects, including loss of data in subsequent
5579 header lines, and spool format errors.
5581 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5582 client host had authenticated. This control can now be exercised by an ACL
5583 for more flexibility.
5585 69. By default, callouts do not happen when testing with -bh. There is now a
5586 variant, -bhc, which does actually run the callout code, including
5587 consulting and updating the callout cache.
5589 70. Added support for saslauthd authentication, courtesy of Alexander
5592 71. If statvfs() failed on the spool or log directories while checking their
5593 size for availability, Exim confusingly gave the error "space shortage".
5594 Furthermore, in debugging mode it crashed with a floating point exception.
5595 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5596 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5597 serious problem, Exim now writes to the main and panic logs when this
5598 happens, with details of the failure. It then refuses to accept the
5599 incoming message, giving the message "spool directory problem" or "log
5600 directory problem" with a 421 code for SMTP messages.
5602 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5603 0, 1, and 2 exist, because some OS complain for execs without them (see
5604 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5605 descriptors. However, the code omitted to check that the open succeeded,
5606 causing mysterious errors if for some reason the permissions on /dev/null
5607 got screwed. Now Exim writes a message to the main and panic logs, and
5608 bombs out if it can't open /dev/null.
5610 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5611 interact so that it is all more flexible. It is supposed to remain
5612 backwards compatible. Also added extra_local_interfaces.
5614 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5615 to bomb out with an assertion failure - to the client this appears as a
5616 connection drop. This problem occurs in the part of the code that was taken
5617 from the Samba project. Fortunately, the assertion is in a very simple
5618 function, so I have fixed this by reproducing the function inline in the
5619 one place where it is called, and arranging for authentication to fail
5620 instead of killing the process with assert().
5622 75. The SPA client code was not working when the server requested OEM rather
5623 than Unicode encoding.
5625 76. Added code to make require_files with a specific uid setting more usable in
5626 the case where statting the file as root fails - usually a non-root-mounted
5627 NFS file system. When this happens and the failure is EACCES, Exim now
5628 forks a subprocess and does the per-uid checking as the relevant uid.
5630 77. Added process_log_path.
5632 78. If log_file_path was not explicitly set, a setting of check_log_space or
5633 check_log_inodes was ignored.
5635 79. If a space check for the spool or log partitions fails, the incident is now
5636 logged. Of course, in the latter case the data may get lost...
5638 80. Added the %p formatting code to string_format() so that it can be used to
5639 print addresses in debug_print(). Adjusted all the address printing in the
5640 debugging in store.c to use %p rather than %d.
5642 81. There was a concern that a line of code in smtp_in.c could overflow a
5643 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5644 initially expressed, the concern was not well-founded, because trailing
5645 spaces are removed early. However, if the trailing spaces were followed by
5646 a NULL, they did not get removed, so the overflow was possible. Two fixes
5649 (a) I re-wrote the offending code in a cleaner fashion.
5650 (b) If an incoming SMTP command contains a NULL character, it is rejected
5653 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5654 runs initgroups(), so that if the Exim user is in any additional groups,
5655 they will be used during message reception.
5661 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob